47 skills found · Page 1 of 2
llogiq / BytecountCounting occurrences of a given byte or UTF-8 characters in a slice of memory – fast
bytesize-rs / BytesizeSemantic wrapper for byte count representations
jettbrains / L W3C Strategic Highlights September 2019 This report was prepared for the September 2019 W3C Advisory Committee Meeting (W3C Member link). See the accompanying W3C Fact Sheet — September 2019. For the previous edition, see the April 2019 W3C Strategic Highlights. For future editions of this report, please consult the latest version. A Chinese translation is available. ☰ Contents Introduction Future Web Standards Meeting Industry Needs Web Payments Digital Publishing Media and Entertainment Web & Telecommunications Real-Time Communications (WebRTC) Web & Networks Automotive Web of Things Strengthening the Core of the Web HTML CSS Fonts SVG Audio Performance Web Performance WebAssembly Testing Browser Testing and Tools WebPlatform Tests Web of Data Web for All Security, Privacy, Identity Internationalization (i18n) Web Accessibility Outreach to the world W3C Developer Relations W3C Training Translations W3C Liaisons Introduction This report highlights recent work of enhancement of the existing landscape of the Web platform and innovation for the growth and strength of the Web. 33 working groups and a dozen interest groups enable W3C to pursue its mission through the creation of Web standards, guidelines, and supporting materials. We track the tremendous work done across the Consortium through homogeneous work-spaces in Github which enables better monitoring and management. We are in the middle of a period where we are chartering numerous working groups which demonstrate the rapid degree of change for the Web platform: After 4 years, we are nearly ready to publish a Payment Request API Proposed Recommendation and we need to soon charter follow-on work. In the last year we chartered the Web Payment Security Interest Group. In the last year we chartered the Web Media Working Group with 7 specifications for next generation Media support on the Web. We have Accessibility Guidelines under W3C Member review which includes Silver, a new approach. We have just launched the Decentralized Identifier Working Group which has tremendous potential because Decentralized Identifier (DID) is an identifier that is globally unique, resolveable with high availability, and cryptographically verifiable. We have Privacy IG (PING) under W3C Member review which strengthens our focus on the tradeoff between privacy and function. We have a new CSS charter under W3C Member review which maps the group's work for the next three years. In this period, W3C and the WHATWG have succesfully completed the negotiation of a Memorandum of Understanding rooted in the mutual belief that that having two distinct specifications claiming to be normative is generally harmful for the Web community. The MOU, signed last May, describes how the two organizations are to collaborate on the development of a single authoritative version of the HTML and DOM specifications. W3C subsequently rechartered the HTML Working Group to assist the W3C community in raising issues and proposing solutions for the HTML and DOM specifications, and for the production of W3C Recommendations from WHATWG Review Drafts. As the Web evolves continuously, some groups are looking for ways for specifications to do so as well. So-called "evergreen recommendations" or "living standards" aim to track continuous development (and maintenance) of features, on a feature-by-feature basis, while getting review and patent commitments. We see the maturation and further development of an incredible number of new technologies coming to the Web. Continued progress in many areas demonstrates the vitality of the W3C and the Web community, as the rest of the report illustrates. Future Web Standards W3C has a variety of mechanisms for listening to what the community thinks could become good future Web standards. These include discussions with the Membership, discussions with other standards bodies, the activities of thousands of participants in over 300 community groups, and W3C Workshops. There are lots of good ideas. The W3C strategy team has been identifying promising topics and invites public participation. Future, recent and under consideration Workshops include: Inclusive XR (5-6 November 2019, Seattle, WA, USA) to explore existing and future approaches on making Virtual and Augmented Reality experiences more inclusive, including to people with disabilities; W3C Workshop on Data Models for Transportation (12-13 September 2019, Palo Alto, CA, USA) W3C Workshop on Web Games (27-28 June 2019, Redmond, WA, USA), view report Second W3C Workshop on the Web of Things (3-5 June 2019, Munich, Germany) W3C Workshop on Web Standardization for Graph Data; Creating Bridges: RDF, Property Graph and SQL (4-6 March 2019, Berlin, Germany), view report Web & Machine Learning. The Strategy Funnel documents the staff's exploration of potential new work at various phases: Exploration and Investigation, Incubation and Evaluation, and eventually to the chartering of a new standards group. The Funnel view is a GitHub Project where new area are issues represented by “cards” which move through the columns, usually from left to right. Most cards start in Exploration and move towards Chartering, or move out of the funnel. Public input is welcome at any stage but particularly once Incubation has begun. This helps W3C identify work that is sufficiently incubated to warrant standardization, to review the ecosystem around the work and indicate interest in participating in its standardization, and then to draft a charter that reflects an appropriate scope. Ongoing feedback can speed up the overall standardization process. Since the previous highlights document, W3C has chartered a number of groups, and started discussion on many more: Newly Chartered or Rechartered Web Application Security WG (03-Apr) Web Payment Security IG (17-Apr) Patent and Standards IG (24-Apr) Web Applications WG (14-May) Web & Networks IG (16-May) Media WG (23-May) Media and Entertainment IG (06-Jun) HTML WG (06-Jun) Decentralized Identifier WG (05-Sep) Extended Privacy IG (PING) (30-Sep) Verifiable Claims WG (30-Sep) Service Workers WG (31-Dec) Dataset Exchange WG (31-Dec) Web of Things Working Group (31-Dec) Web Audio Working Group (31-Dec) Proposed charters / Advance Notice Accessibility Guidelines WG Privacy IG (PING) RDF Literal Direction WG Timed Text WG CSS WG Web Authentication WG Closed Internationalization Tag Set IG Meeting Industry Needs Web Payments All Web Payments specifications W3C's payments standards enable a streamlined checkout experience, enabling a consistent user experience across the Web with lower front end development costs for merchants. Users can store and reuse information and more quickly and accurately complete online transactions. The Web Payments Working Group has republished Payment Request API as a Candidate Recommendation, aiming to publish a Proposed Recommendation in the Fall 2019, and is discussing use cases and features for Payment Request after publication of the 1.0 Recommendation. Browser vendors have been finalizing implementation of features added in the past year (view the implementation report). As work continues on the Payment Handler API and its implementation (currently in Chrome and Edge Canary), one focus in 2019 is to increase adoption in other browsers. Recently, Mastercard demonstrated the use of Payment Request API to carry out EMVCo's Secure Remote Commerce (SRC) protocol whose payment method definition is being developed with active participation by Visa, Mastercard, American Express, and Discover. Payment method availability is a key factor in merchant considerations about adopting Payment Request API. The ability to get uniform adoption of a new payment method such as Secure Remote Commerce (SRC) also depends on the availability of the Payment Handler API in browsers, or of proprietary alternatives. Web Monetization, which the Web Payments Working Group will discuss again at its face-to-face meeting in September, can be used to enable micropayments as an alternative revenue stream to advertising. Since the beginning of 2019, Amazon, Brave Software, JCB, Certus Cybersecurity Solutions and Netflix have joined the Web Payments Working Group. In April, W3C launched the Web Payment Security Group to enable W3C, EMVCo, and the FIDO Alliance to collaborate on a vision for Web payment security and interoperability. Participants will define areas of collaboration and identify gaps between existing technical specifications in order to increase compatibility among different technologies, such as: How do SRC, FIDO, and Payment Request relate? The Payment Services Directive 2 (PSD2) regulations in Europe are scheduled to take effect in September 2019. What is the role of EMVCo, W3C, and FIDO technologies, and what is the current state of readiness for the deadline? How can we improve privacy on the Web at the same time as we meet industry requirements regarding user identity? Digital Publishing All Digital Publishing specifications, Publication milestones The Web is the universal publishing platform. Publishing is increasingly impacted by the Web, and the Web increasingly impacts Publishing. Topic of particular interest to Publishing@W3C include typography and layout, accessibility, usability, portability, distribution, archiving, offline access, print on demand, and reliable cross referencing. And the diverse publishing community represented in the groups consist of the traditional "trade" publishers, ebook reading system manufacturers, but also publishers of audio book, scholarly journals or educational materials, library scientists or browser developers. The Publishing Working Group currently concentrates on Audiobooks which lack a comprehensive standard, thus incurring extra costs and time to publish in this booming market. Active development is ongoing on the future standard: Publication Manifest Audiobook profile for Web Publications Lightweight Packaging Format The BD Comics Manga Community Group, the Synchronized Multimedia for Publications Community Group, the Publishing Community Group and a future group on archival, are companions to the working group where specific work is developed and incubated. The Publishing Community Group is a recently launched incubation channel for Publishing@W3C. The goal of the group is to propose, document, and prototype features broadly related to: publications on the Web reading modes and systems and the user experience of publications The EPUB 3 Community Group has successfully completed the revision of EPUB 3.2. The Publishing Business Group fosters ongoing participation by members of the publishing industry and the overall ecosystem in the development of Web infrastructure to better support the needs of the industry. The Business Group serves as an additional conduit to the Publishing Working Group and several Community Groups for feedback between the publishing ecosystem and W3C. The Publishing BG has played a vital role in fostering and advancing the adoption and continued development of EPUB 3. In particular the BG provided critical support to the update of EPUBCheck to validate EPUB content to the new EPUB 3.2 specification. This resulted in the development, in conjunction with the EPUB3 Community Group, of a new generation of EPUBCheck, i.e., EPUBCheck 4.2 production-ready release. Media and Entertainment All Media specifications The Media and Entertainment vertical tracks media-related topics and features that create immersive experiences for end users. HTML5 brought standard audio and video elements to the Web. Standardization activities since then have aimed at turning the Web into a professional platform fully suitable for the delivery of media content and associated materials, enabling missing features to stream video content on the Web such as adaptive streaming and content protection. Together with Microsoft, Comcast, Netflix and Google, W3C received an Technology & Engineering Emmy Award in April 2019 for standardization of a full TV experience on the Web. Current goals are to: Reinforce core media technologies: Creation of the Media Working Group, to develop media-related specifications incubated in the WICG (e.g. Media Capabilities, Picture-in-picture, Media Session) and maintain maintain/evolve Media Source Extensions (MSE) and Encrypted Media Extensions (EME). Improve support for Media Timed Events: data cues incubation. Enhance color support (HDR, wide gamut), in scope of the CSS WG and in the Color on the Web CG. Reduce fragmentation: Continue annual releases of a common and testable baseline media devices, in scope of the Web Media APIs CG and in collaboration with the CTA WAVE Project. Maintain the Road-map of Media Technologies for the Web which highlights Web technologies that can be used to build media applications and services, as well as known gaps to enable additional use cases. Create the future: Discuss perspectives for Media and Entertainment for the Web. Bring the power of GPUs to the Web (graphics, machine learning, heavy processing), under incubation in the GPU for the Web CG. Transition to a Working Group is under discussion. Determine next steps after the successful W3C Workshop on Web Games of June 2019. View the report. Timed Text The Timed Text Working Group develops and maintains formats used for the representation of text synchronized with other timed media, like audio and video, and notably works on TTML, profiles of TTML, and WebVTT. Recent progress includes: A robust WebVTT implementation report poises the specification for publication as a proposed recommendation. Discussions around re-chartering, notably to add a TTML Profile for Audio Description deliverable to the scope of the group, and clarify that rendering of captions within XR content is also in scope. Immersive Web Hardware that enables Virtual Reality (VR) and Augmented Reality (AR) applications are now broadly available to consumers, offering an immersive computing platform with both new opportunities and challenges. The ability to interact directly with immersive hardware is critical to ensuring that the web is well equipped to operate as a first-class citizen in this environment. The Immersive Web Working Group has been stabilizing the WebXR Device API while the companion Immersive Web Community Group incubates the next series of features identified as key for the future of the Immersive Web. W3C plans a workshop focused on the needs and benefits at the intersection of VR & Accessibility (Inclusive XR), on 5-6 November 2019 in Seattle, WA, USA, to explore existing and future approaches on making Virtual and Augmented Reality experiences more inclusive. Web & Telecommunications The Web is the Open Platform for Mobile. Telecommunication service providers and network equipment providers have long been critical actors in the deployment of Web technologies. As the Web platform matures, it brings richer and richer capabilities to extend existing services to new users and devices, and propose new and innovative services. Real-Time Communications (WebRTC) All Real-Time Communications specifications WebRTC has reshaped the whole communication landscape by making any connected device a potential communication end-point, bringing audio and video communications anywhere, on any network, vastly expanding the ability of operators to reach their customers. WebRTC serves as the corner-stone of many online communication and collaboration services. The WebRTC Working Group aims to bringing WebRTC 1.0 (and companion specification Media Capture and Streams) to Recommendation by the end of 2019. Intense efforts are focused on testing (supported by a dedicated hackathon at IETF 104) and interoperability. The group is considering pushing features that have not gotten enough traction to separate modules or to a later minor revision of the spec. Beyond WebRTC 1.0, the WebRTC Working Group will focus its efforts on WebRTC NV which the group has started documenting by identifying use cases. Web & Networks Recently launched, in the wake of the May 2018 Web5G workshop, the Web & Networks Interest Group is chaired by representatives from AT&T, China Mobile and Intel, with a goal to explore solutions for web applications to achieve better performance and resource allocation, both on the device and network. The group's first efforts are around use cases, privacy & security requirements and liaisons. Automotive All Automotive specifications To create a rich application ecosystem for vehicles and other devices allowed to connect to the vehicle, the W3C Automotive Working Group is delivering a service specification to expose all common vehicle signals (engine temperature, fuel/charge level, range, tire pressure, speed, etc.) The Vehicle Information Service Specification (VISS), which is a Candidate Recommendation, is seeing more implementations across the industry. It provides the access method to a common data model for all the vehicle signals –presently encapsulating a thousand or so different data elements– and will be growing to accommodate the advances in automotive such as autonomous and driver assist technologies and electrification. The group is already working on a successor to VISS, leveraging the underlying data model and the VIWI submission from Volkswagen, for a more robust means of accessing vehicle signals information and the same paradigm for other automotive needs including location-based services, media, notifications and caching content. The Automotive and Web Platform Business Group acts as an incubator for prospective standards work. One of its task forces is using W3C VISS in performing data sampling and off-boarding the information to the cloud. Access to the wealth of information that W3C's auto signals standard exposes is of interest to regulators, urban planners, insurance companies, auto manufacturers, fleet managers and owners, service providers and others. In addition to components needed for data sampling and edge computing, capturing user and owner consent, information collection methods and handling of data are in scope. The upcoming W3C Workshop on Data Models for Transportation (September 2019) is expected to focus on the need of additional ontologies around transportation space. Web of Things All Web of Things specifications W3C's Web of Things work is designed to bridge disparate technology stacks to allow devices to work together and achieve scale, thus enabling the potential of the Internet of Things by eliminating fragmentation and fostering interoperability. Thing descriptions expressed in JSON-LD cover the behavior, interaction affordances, data schema, security configuration, and protocol bindings. The Web of Things complements existing IoT ecosystems to reduce the cost and risk for suppliers and consumers of applications that create value by combining multiple devices and information services. There are many sectors that will benefit, e.g. smart homes, smart cities, smart industry, smart agriculture, smart healthcare and many more. The Web of Things Working Group is finishing the initial Web of Things standards, with support from the Web of Things Interest Group: Web of Things Architecture Thing Descriptions Strengthening the Core of the Web HTML The HTML Working Group was chartered early June to assist the W3C community in raising issues and proposing solutions for the HTML and DOM specifications, and to produce W3C Recommendations from WHATWG Review Drafts. A few days before, W3C and the WHATWG signed a Memorandum of Understanding outlining the agreement to collaborate on the development of a single version of the HTML and DOM specifications. Issues and proposed solutions for HTML and DOM done via the newly rechartered HTML Working Group in the WHATWG repositories The HTML Working Group is targetting November 2019 to bring HTML and DOM to Candidate Recommendations. CSS All CSS specifications CSS is a critical part of the Open Web Platform. The CSS Working Group gathers requirements from two large groups of CSS users: the publishing industry and application developers. Within W3C, those groups are exemplified by the Publishing groups and the Web Platform Working Group. The former requires things like better pagination support and advanced font handling, the latter needs intelligent (and fast!) scrolling and animations. What we know as CSS is actually a collection of almost a hundred specifications, referred to as ‘modules’. The current state of CSS is defined by a snapshot, updated once a year. The group also publishes an index defining every term defined by CSS specifications. Fonts All Fonts specifications The Web Fonts Working Group develops specifications that allow the interoperable deployment of downloadable fonts on the Web, with a focus on Progressive Font Enrichment as well as maintenance of WOFF Recommendations. Recent and ongoing work includes: Early API experiments by Adobe and Monotype have demonstrated the feasibility of a font enrichment API, where a server delivers a font with minimal glyph repertoire and the client can query the full repertoire and request additional subsets on-the-fly. In other experiments, the Brotli compression used in WOFF 2 was extended to support shared dictionaries and patch update. Metrics to quantify improvement are a current hot discussion topic. The group will meet at ATypi 2019 in Japan, to gather requirements from the international typography community. The group will first produce a report summarizing the strengths and weaknesses of each prototype solution by Q2 2020. SVG All SVG specifications SVG is an important and widely-used part of the Open Web Platform. The SVG Working Group focuses on aligning the SVG 2.0 specification with browser implementations, having split the specification into a currently-implemented 2.0 and a forward-looking 2.1. Current activity is on stabilization, increased integration with the Open Web Platform, and test coverage analysis. The Working Group was rechartered in March 2019. A new work item concerns native (non-Web-browser) uses of SVG as a non-interactive, vector graphics format. Audio The Web Audio Working Group was extended to finish its work on the Web Audio API, expecting to publish it as a Recommendation by year end. The specification enables synthesizing audio in the browser. Audio operations are performed with audio nodes, which are linked together to form a modular audio routing graph. Multiple sources — with different types of channel layout — are supported. This modular design provides the flexibility to create complex audio functions with dynamic effects. The first version of Web Audio API is now feature complete and is implemented in all modern browsers. Work has started on the next version, and new features are being incubated in the Audio Community Group. Performance Web Performance All Web Performance specifications There are currently 18 specifications in development in the Web Performance Working Group aiming to provide methods to observe and improve aspects of application performance of user agent features and APIs. The W3C team is looking at related work incubated in the W3C GPU for the Web (WebGPU) Community Group which is poised to transition to a W3C Working Group. A preliminary draft charter is available. WebAssembly All WebAssembly specifications WebAssembly improves Web performance and power by being a virtual machine and execution environment enabling loaded pages to run native (compiled) code. It is deployed in Firefox, Edge, Safari and Chrome. The specification will soon reach Candidate Recommendation. WebAssembly enables near-native performance, optimized load time, and perhaps most importantly, a compilation target for existing code bases. While it has a small number of native types, much of the performance increase relative to Javascript derives from its use of consistent typing. WebAssembly leverages decades of optimization for compiled languages and the byte code is optimized for compactness and streaming (the web page starts executing while the rest of the code downloads). Network and API access all occurs through accompanying Javascript libraries -- the security model is identical to that of Javascript. Requirements gathering and language development occur in the Community Group while the Working Group manages test development, community review and progression of specifications on the Recommendation Track. Testing Browser testing plays a critical role in the growth of the Web by: Improving the reliability of Web technology definitions; Improving the quality of implementations of these technologies by helping vendors to detect bugs in their products; Improving the data available to Web developers on known bugs and deficiencies of Web technologies by publishing results of these tests. Browser Testing and Tools The Browser Testing and Tools Working Group is developing WebDriver version 2, having published last year the W3C Recommendation of WebDriver. WebDriver acts as a remote control interface that enables introspection and control of user agents, provides a platform- and language-neutral wire protocol as a way for out-of-process programs to remotely instruct the behavior of Web, and emulates the actions of a real person using the browser. WebPlatform Tests The WebPlatform Tests project now provides a mechanism which allows to fully automate tests that previously needed to be run manually: TestDriver. TestDriver enables sending trusted key and mouse events, sending complex series of trusted pointer and key interactions for things like in-content drag-and-drop or pinch zoom, and even file upload. Since 2014 W3C began work on this coordinated open-source effort to build a cross-browser test suite for the Web Platform, which WHATWG, and all major browsers adopted. Web of Data All Data specifications There have been several great success stories around the standardization of data on the web over the past year. Verifiable Claims seems to have significant uptake. It is also significant that the Distributed Identifier WG charter has received numerous favorable reviews, and was just recently launched. JSON-LD has been a major success with the large deployment on Web sites via schema.org. JSON-LD 1.1 completed technical work, about to transition to CR More than 25% of websites today include schema.org data in JSON-LD The Web of Things description is in CR since May, making use of JSON-LD Verifiable Credentials data model is in CR since July, also making use of JSON-LD Continued strong interest in decentralized identifiers Engagement from the TAG with reframing core documents, such as Ethical Web Principles, to include data on the web within their scope Data is increasingly important for all organizations, especially with the rise of IoT and Big Data. W3C has a mature and extensive suite of standards relating to data that were developed over two decades of experience, with plans for further work on making it easier for developers to work with graph data and knowledge graphs. Linked Data is about the use of URIs as names for things, the ability to dereference these URIs to get further information and to include links to other data. There are ever-increasing sources of open Linked Data on the Web, as well as data services that are restricted to the suppliers and consumers of those services. The digital transformation of industry is seeking to exploit advanced digital technologies. This will facilitate businesses to integrate horizontally along the supply and value chains, and vertically from the factory floor to the office floor. W3C is seeking to make it easier to support enterprise-wide data management and governance, reflecting the strategic importance of data to modern businesses. Traditional approaches to data have focused on tabular databases (SQL/RDBMS), Comma Separated Value (CSV) files, and data embedded in PDF documents and spreadsheets. We're now in midst of a major shift to graph data with nodes and labeled directed links between them. Graph data is: Faster than using SQL and associated JOIN operations More favorable to integrating data from heterogeneous sources Better suited to situations where the data model is evolving In the wake of the recent W3C Workshop on Graph Data we are in the process of launching a Graph Standardization Business Group to provide a business perspective with use cases and requirements, to coordinate technical standards work and liaisons with external organizations. Web for All Security, Privacy, Identity All Security specifications, all Privacy specifications Authentication on the Web As the WebAuthn Level 1 W3C Recommendation published last March is seeing wide implementation and adoption of strong cryptographic authentication, work is proceeding on Level 2. The open standard Web API gives native authentication technology built into native platforms, browsers, operating systems (including mobile) and hardware, offering protection against hacking, credential theft, phishing attacks, thus aiming to end the era of passwords as a security construct. You may read more in our March press release. Privacy An increasing number of W3C specifications are benefitting from Privacy and Security review; there are security and privacy aspects to every specification. Early review is essential. Working with the TAG, the Privacy Interest Group has updated the Self-Review Questionnaire: Security and Privacy. Other recent work of the group includes public blogging further to the exploration of anti-patterns in standards and permission prompts. Security The Web Application Security Working Group adopted Feature Policy, aiming to allow developers to selectively enable, disable, or modify the behavior of some of these browser features and APIs within their application; and Fetch Metadata, aiming to provide servers with enough information to make a priori decisions about whether or not to service a request based on the way it was made, and the context in which it will be used. The Web Payment Security Interest Group, launched last April, convenes members from W3C, EMVCo, and the FIDO Alliance to discuss cooperative work to enhance the security and interoperability of Web payments (read more about payments). Internationalization (i18n) All Internationalization specifications, educational articles related to Internationalization, spec developers checklist Only a quarter or so current Web users use English online and that proportion will continue to decrease as the Web reaches more and more communities of limited English proficiency. If the Web is to live up to the "World Wide" portion of its name, and for the Web to truly work for stakeholders all around the world engaging with content in various languages, it must support the needs of worldwide users as they engage with content in the various languages. The growth of epublishing also brings requirements for new features and improved typography on the Web. It is important to ensure the needs of local communities are captured. The W3C Internationalization Initiative was set up to increase in-house resources dedicated to accelerating progress in making the World Wide Web "worldwide" by gathering user requirements, supporting developers, and education & outreach. For an overview of current projects see the i18n radar. W3C's Internationalization efforts progressed on a number of fronts recently: Requirements: New African and European language groups will work on the gap analysis, errata and layout requirements. Gap analysis: Japanese, Devanagari, Bengali, Tamil, Lao, Khmer, Javanese, and Ethiopic updated in the gap-analysis documents. Layout requirements document: notable progress tracked in the Southeast Asian Task Force while work continues on Chinese layout requirements. Developer support: Spec reviews: the i18n WG continues active review of specifications of the WHATWG and other W3C Working Groups. Short review checklist: easy way to begin a self-review to help spec developers understand what aspects of their spec are likely to need attention for internationalization, and points them to more detailed checklists for the relevant topics. It also helps those reviewing specs for i18n issues. Strings on the Web: Language and Direction Metadata lays out issues and discusses potential solutions for passing information about language and direction with strings in JSON or other data formats. The document was rewritten for clarity, and expanded. The group is collaborating with the JSON-LD and Web Publishing groups to develop a plan for updating RDF, JSON-LD and related specifications to handle metadata for base direction of text (bidi). User-friendly test format: a new format was developed for Internationalization Test Suite tests, which displays helpful information about how the test works. This particularly useful because those tests are pointed to by educational materials and gap-analysis documents. Web Platform Tests: a large number of tests in the i18n test suite have been ported to the WPT repository, including: css-counter-styles, css-ruby, css-syntax, css-test, css-text-decor, css-writing-modes, and css-pseudo. Education & outreach: (for all educational materials, see the HTML & CSS Authoring Techniques) Web Accessibility All Accessibility specifications, WAI resources The Web Accessibility Initiative supports W3C's Web for All mission. Recent achievements include: Education and training: Inaccessibility of CAPTCHA updated to bring our analysis and recommendations up to date with CAPTCHA practice today, concluding two years of extensive work and invaluable input from the public (read more on the W3C Blog Learn why your web content and applications should be accessible. The Education and Outreach Working Group has completed revision and updating of the Business Case for Digital Accessibility. Accessibility guidelines: The Accessibility Guidelines Working Group has continued to update WCAG Techniques and Understanding WCAG 2.1; and published a Candidate Recommendation of Accessibility Conformance Testing Rules Format 1.0 to improve inter-rater reliability when evaluating conformance of web content to WCAG An updated charter is being developed to host work on "Silver", the next generation accessibility guidelines (WCAG 2.2) There are accessibility aspects to most specifications. Check your work with the FAST checklist. Outreach to the world W3C Developer Relations To foster the excellent feedback loop between Web Standards development and Web developers, and to grow participation from that diverse community, recent W3C Developer Relations activities include: @w3cdevs tracks the enormous amount of work happening across W3C W3C Track during the Web Conference 2019 in San Francisco Tech videos: W3C published the 2019 Web Games Workshop videos The 16 September 2019 Developer Meetup in Fukuoka, Japan, is open to all and will combine a set of technical demos prepared by W3C groups, and a series of talks on a selected set of W3C technologies and projects W3C is involved with Mozilla, Google, Samsung, Microsoft and Bocoup in the organization of ViewSource 2019 in Amsterdam (read more on the W3C Blog) W3C Training In partnership with EdX, W3C's MOOC training program, W3Cx offers a complete "Front-End Web Developer" (FEWD) professional certificate program that consists of a suite of five courses on the foundational languages that power the Web: HTML5, CSS and JavaScript. We count nearly 900K students from all over the world. Translations Many Web users rely on translations of documents developed at W3C whose official language is English. W3C is extremely grateful to the continuous efforts of its community in ensuring our various deliverables in general, and in our specifications in particular, are made available in other languages, for free, ensuring their exposure to a much more diverse set of readers. Last Spring we developed a more robust system, a new listing of translations of W3C specifications and updated the instructions on how to contribute to our translation efforts. W3C Liaisons Liaisons and coordination with numerous organizations and Standards Development Organizations (SDOs) is crucial for W3C to: make sure standards are interoperable coordinate our respective agenda in Internet governance: W3C participates in ICANN, GIPO, IGF, the I* organizations (ICANN, IETF, ISOC, IAB). ensure at the government liaison level that our standards work is officially recognized when important to our membership so that products based on them (often done by our members) are part of procurement orders. W3C has ARO/PAS status with ISO. W3C participates in the EU MSP and Rolling Plan on Standardization ensure the global set of Web and Internet standards form a compatible stack of technologies, at the technical and policy level (patent regime, fragmentation, use in policy making) promote Standards adoption equally by the industry, the public sector, and the public at large Coralie Mercier, Editor, W3C Marketing & Communications $Id: Overview.html,v 1.60 2019/10/15 12:05:52 coralie Exp $ Copyright © 2019 W3C ® (MIT, ERCIM, Keio, Beihang) Usage policies apply.
bostrt / Wordcount.jsCalculate file newlines, word, and byte counts on client side using HTML5 File API. (Emulates Linux's wc command)
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SOYJUN / FTP Implement Based On UDPThe aim of this assignment is to have you do UDP socket client / server programming with a focus on two broad aspects : Setting up the exchange between the client and server in a secure way despite the lack of a formal connection (as in TCP) between the two, so that ‘outsider’ UDP datagrams (broadcast, multicast, unicast - fortuitously or maliciously) cannot intrude on the communication. Introducing application-layer protocol data-transmission reliability, flow control and congestion control in the client and server using TCP-like ARQ sliding window mechanisms. The second item above is much more of a challenge to implement than the first, though neither is particularly trivial. But they are not tightly interdependent; each can be worked on separately at first and then integrated together at a later stage. Apart from the material in Chapters 8, 14 & 22 (especially Sections 22.5 - 22.7), and the experience you gained from the preceding assignment, you will also need to refer to the following : ioctl function (Chapter 17). get_ifi_info function (Section 17.6, Chapter 17). This function will be used by the server code to discover its node’s network interfaces so that it can bind all its interface IP addresses (see Section 22.6). ‘Race’ conditions (Section 20.5, Chapter 20) You also need a thorough understanding of how the TCP protocol implements reliable data transfer, flow control and congestion control. Chapters 17- 24 of TCP/IP Illustrated, Volume 1 by W. Richard Stevens gives a good overview of TCP. Though somewhat dated for some things (it was published in 1994), it remains, overall, a good basic reference. Overview This assignment asks you to implement a primitive file transfer protocol for Unix platforms, based on UDP, and with TCP-like reliability added to the transfer operation using timeouts and sliding-window mechanisms, and implementing flow and congestion control. The server is a concurrent server which can handle multiple clients simultaneously. A client gives the server the name of a file. The server forks off a child which reads directly from the file and transfers the contents over to the client using UDP datagrams. The client prints out the file contents as they come in, in order, with nothing missing and with no duplication of content, directly on to stdout (via the receiver sliding window, of course, but with no other intermediate buffering). The file to be transferred can be of arbitrary length, but its contents are always straightforward ascii text. As an aside let me mention that assuming the file contents ascii is not as restrictive as it sounds. We can always pretend, for example, that binary files are base64 encoded (“ASCII armor”). A real file transfer protocol would, of course, have to worry about transferring files between heterogeneous platforms with different file structure conventions and semantics. The sender would first have to transform the file into a platform-independent, protocol-defined, format (using, say, ASN.1, or some such standard), and the receiver would have to transform the received file into its platform’s native file format. This kind of thing can be fairly time consuming, and is certainly very tedious, to implement, with little educational value - it is not part of this assignment. Arguments for the server You should provide the server with an input file server.in from which it reads the following information, in the order shown, one item per line : Well-known port number for server. Maximum sending sliding-window size (in datagram units). You will not be handing in your server.in file. We shall create our own when we come to test your code. So it is important that you stick strictly to the file name and content conventions specified above. The same applies to the client.in input file below. Arguments for the client The client is to be provided with an input file client.in from which it reads the following information, in the order shown, one item per line : IP address of server (not the hostname). Well-known port number of server. filename to be transferred. Receiving sliding-window size (in datagram units). Random generator seed value. Probability p of datagram loss. This should be a real number in the range [ 0.0 , 1.0 ] (value 0.0 means no loss occurs; value 1.0 means all datagrams all lost). The mean µ, in milliseconds, for an exponential distribution controlling the rate at which the client reads received datagram payloads from its receive buffer. Operation Server starts up and reads its arguments from file server.in. As we shall see, when a client communicates with the server, the server will want to know what IP address that client is using to identify the server (i.e. , the destination IP address in the incoming datagram). Normally, this can be done relatively straightforwardly using the IP_RECVDESTADDR socket option, and picking up the information using the ancillary data (‘control information’) capability of the recvmsg function. Unfortunately, Solaris 2.10 does not support the IP_RECVDESTADDR option (nor, incidentally, does it support the msg_flags option in msghdr - see p.390). This considerably complicates things. In the absence of IP_RECVDESTADDR, what the server has to do as part of its initialization phase is to bind each IP address it has (and, simultaneously, its well-known port number, which it has read in from server.in) to a separate UDP socket. The code in Section 22.6, which uses the get_ifi_info function, shows you how to do that. However, there are important differences between that code and the version you want to implement. The code of Section 22.6 binds the IP addresses and forks off a child for each address that is bound to. We do not want to do that. Instead you should have an array of socket descriptors. For each IP address, create a new socket and bind the address (and well-known port number) to the socket without forking off child processes. Creating child processes comes later, when clients arrive. The code of Section 22.6 also attempts to bind broadcast addresses. We do not want to do this. It binds a wildcard IP address, which we certainly do not want to do either. We should bind strictly only unicast addresses (including the loopback address). The get_ifi_info function (which the code in Section 22.6 uses) has to be modified so that it also gets the network masks for the IP addresses of the node, and adds these to the information stored in the linked list of ifi_info structures (see Figure 17.5, p.471) it produces. As you go binding each IP address to a distinct socket, it will be useful for later processing to build your own array of structures, where a structure element records the following information for each socket : sockfd IP address bound to the socket network mask for the IP address subnet address (obtained by doing a bit-wise and between the IP address and its network mask) Report, in a ReadMe file which you hand in with your code, on the modifications you had to introduce to ensure that only unicast addresses are bound, and on your implementation of the array of structures described above. You should print out on stdout, with an appropriate message and appropriately formatted in dotted decimal notation, the IP address, network mask, and subnet address for each socket in your array of structures (you do not need to print the sockfd). The server now uses select to monitor the sockets it has created for incoming datagrams. When it returns from select, it must use recvfrom or recvmsg to read the incoming datagram (see 6. below). When a client starts, it first reads its arguments from the file client.in. The client checks if the server host is ‘local’ to its (extended) Ethernet. If so, all its communication to the server is to occur as MSG_DONTROUTE (or SO_DONTROUTE socket option). It determines if the server host is ‘local’ as follows. The first thing the client should do is to use the modified get_ifi_info function to obtain all of its IP addresses and associated network masks. Print out on stdout, in dotted decimal notation and with an appropriate message, the IP addresses and network masks obtained. In the following, IPserver designates the IP address the client will use to identify the server, and IPclient designates the IP address the client will choose to identify itself. The client checks whether the server is on the same host. If so, it should use the loopback address 127.0.0.1 for the server (i.e. , IPserver = 127.0.0.1). IPclient should also be set to the loopback address. Otherwise it proceeds as follows: IPserver is set to the IP address for the server in the client.in file. Given IPserver and the (unicast) IP addresses and network masks for the client returned by get_ifi_info in the linked list of ifi_info structures, you should be able to figure out if the server node is ‘local’ or not. This will be discussed in class; but let me just remind you here that you should use ‘longest prefix matching’ where applicable. If there are multiple client addresses, and the server host is ‘local’, the client chooses an IP address for itself, IPclient, which matches up as ‘local’ according to your examination above. If the server host is not ‘local’, then IPclient can be chosen arbitrarily. Print out on stdout the results of your examination, as to whether the server host is ‘local’ or not, as well as the IPclient and IPserver addresses selected. Note that this manner of determining whether the server is local or not is somewhat clumsy and ‘over-engineered’, and, as such, should be viewed more in the nature of a pedagogical exercise. Ideally, we would like to look up the server IP address(es) in the routing table (see Section 18.3). This requires that a routing socket be created, for which we need superuser privilege. Alternatively, we might want to dump out the routing table, using the sysctl function for example (see Section 18.4), and examine it directly. Unfortunately, Solaris 2.10 does not support sysctl. Furthermore, note that there is a slight problem with the address 130.245.1.123/24 assigned to compserv3 (see rightmost column of file hosts, and note that this particular compserv3 address “overlaps” with the 130.245.1.x/28 addresses in that same column assigned to compserv1, compserv2 & comserv4). In particular, if the client is running on compserv3 and the server on any of the other three compservs, and if that server node is also being identified to the client by its /28 (rather than its /24) address, then the client will get a “false positive” when it tests as to whether the server node is local or not. In other words, the client will deem the server node to be local, whereas in fact it should not be considered local. Because of this, it is perhaps best simply not to use compserv3 to run the client (but it is o.k. to use it to run the server). Finally, using MSG_DONTROUTE where possible would seem to gain us efficiency, in as much as the kernel does not need to consult the routing table for every datagram sent. But, in fact, that is not so. Recall that one effect of connect with UDP sockets is that routing information is obtained by the kernel at the time the connect is issued. That information is cached and used for subsequent sends from the connected socket (see p.255). The client now creates a UDP socket and calls bind on IPclient, with 0 as the port number. This will cause the kernel to bind an ephemeral port to the socket. After the bind, use the getsockname function (Section 4.10) to obtain IPclient and the ephemeral port number that has been assigned to the socket, and print that information out on stdout, with an appropriate message and appropriately formatted. The client connects its socket to IPserver and the well-known port number of the server. After the connect, use the getpeername function (Section 4.10) to obtain IPserver and the well-known port number of the server, and print that information out on stdout, with an appropriate message and appropriately formatted. The client sends a datagram to the server giving the filename for the transfer. This send needs to be backed up by a timeout in case the datagram is lost. Note that the incoming datagram from the client will be delivered to the server at the socket to which the destination IP address that the datagram is carrying has been bound. Thus, the server can obtain that address (it is, of course, IPserver) and thereby achieve what IP_RECVDESTADDR would have given us had it been available. Furthermore, the server process can obtain the IP address (this will, of course, be IPclient) and ephemeral port number of the client through the recvfrom or recvmsg functions. The server forks off a child process to handle the client. The server parent process goes back to the select to listen for new clients. Hereafter, and unless otherwise stated, whenever we refer to the ‘server’, we mean the server child process handling the client’s file transfer, not the server parent process. Typically, the first thing the server child would be expected to do is to close all sockets it ‘inherits’ from its parent. However, this is not the case with us. The server child does indeed close the sockets it inherited, but not the socket on which the client request arrived. It leaves that socket open for now. Call this socket the ‘listening’ socket. The server (child) then checks if the client host is local to its (extended) Ethernet. If so, all its communication to the client is to occur as MSG_DONTROUTE (or SO_DONTROUTE socket option). If IPserver (obtained in 5. above) is the loopback address, then we are done. Otherwise, the server has to proceed with the following step. Use the array of structures you built in 1. above, together with the addresses IPserver and IPclient to determine if the client is ‘local’. Print out on stdout the results of your examination, as to whether the client host is ‘local’ or not. The server (child) creates a UDP socket to handle file transfer to the client. Call this socket the ‘connection’ socket. It binds the socket to IPserver, with port number 0 so that its kernel assigns an ephemeral port. After the bind, use the getsockname function (Section 4.10) to obtain IPserver and the ephemeral port number that has been assigned to the socket, and print that information out on stdout, with an appropriate message and appropriately formatted. The server then connects this ‘connection’ socket to the client’s IPclient and ephemeral port number. The server now sends the client a datagram, in which it passes it the ephemeral port number of its ‘connection’ socket as the data payload of the datagram. This datagram is sent using the ‘listening’ socket inherited from its parent, otherwise the client (whose socket is connected to the server’s ‘listening’ socket at the latter’s well-known port number) will reject it. This datagram must be backed up by the ARQ mechanism, and retransmitted in the event of loss. Note that if this datagram is indeed lost, the client might well time out and retransmit its original request message (the one carrying the file name). In this event, you must somehow ensure that the parent server does not mistake this retransmitted request for a new client coming in, and spawn off yet another child to handle it. How do you do that? It is potentially more involved than it might seem. I will be discussing this in class, as well as ‘race’ conditions that could potentially arise, depending on how you code the mechanisms I present. When the client receives the datagram carrying the ephemeral port number of the server’s ‘connection’ socket, it reconnects its socket to the server’s ‘connection’ socket, using IPserver and the ephemeral port number received in the datagram (see p.254). It now uses this reconnected socket to send the server an acknowledgment. Note that this implies that, in the event of the server timing out, it should retransmit two copies of its ‘ephemeral port number’ message, one on its ‘listening’ socket and the other on its ‘connection’ socket (why?). When the server receives the acknowledgment, it closes the ‘listening’ socket it inherited from its parent. The server can now commence the file transfer through its ‘connection’ socket. The net effect of all these binds and connects at server and client is that no ‘outsider’ UDP datagram (broadcast, multicast, unicast - fortuitously or maliciously) can now intrude on the communication between server and client. Starting with the first datagram sent out, the client behaves as follows. Whenever a datagram arrives, or an ACK is about to be sent out (or, indeed, the initial datagram to the server giving the filename for the transfer), the client uses some random number generator function random() (initialized by the client.in argument value seed) to decide with probability p (another client.in argument value) if the datagram or ACK should be discarded by way of simulating transmission loss across the network. (I will briefly discuss in class how you do this.) Adding reliability to UDP The mechanisms you are to implement are based on TCP Reno. These include : Reliable data transmission using ARQ sliding-windows, with Fast Retransmit. Flow control via receiver window advertisements. Congestion control that implements : SlowStart Congestion Avoidance (‘Additive-Increase/Multiplicative Decrease’ – AIMD) Fast Recovery (but without the window-inflation aspect of Fast Recovery) Only some, and by no means all, of the details for these are covered below. The rest will be presented in class, especially those concerning flow control and TCP Reno’s congestion control mechanisms in general : Slow Start, Congestion Avoidance, Fast Retransmit and Fast Recovery. Implement a timeout mechanism on the sender (server) side. This is available to you from Stevens, Section 22.5 . Note, however, that you will need to modify the basic driving mechanism of Figure 22.7 appropriately since the situation at the sender side is not a repetitive cycle of send-receive, but rather a straightforward progression of send-send-send-send- . . . . . . . . . . . Also, modify the RTT and RTO mechanisms of Section 22.5 as specified below. I will be discussing the details of these modifications and the reasons for them in class. Modify function rtt_stop (Fig. 22.13) so that it uses integer arithmetic rather than floating point. This will entail your also having to modify some of the variable and function parameter declarations throughout Section 22.5 from float to int, as appropriate. In the unprrt.h header file (Fig. 22.10) set : RTT_RXTMIN to 1000 msec. (1 sec. instead of the current value 3 sec.) RTT_RXTMAX to 3000 msec. (3 sec. instead of the current value 60 sec.) RTT_MAXNREXMT to 12 (instead of the current value 3) In function rtt_timeout (Fig. 22.14), after doubling the RTO in line 86, pass its value through the function rtt_minmax of Fig. 22.11 (somewhat along the lines of what is done in line 77 of rtt_stop, Fig. 22.13). Finally, note that with the modification to integer calculation of the smoothed RTT and its variation, and given the small RTT values you will experience on the cs / sbpub network, these calculations should probably now be done on a millisecond or even microsecond scale (rather than in seconds, as is the case with Stevens’ code). Otherwise, small measured RTTs could show up as 0 on a scale of seconds, yielding a negative result when we subtract the smoothed RTT from the measured RTT (line 72 of rtt_stop, Fig. 22.13). Report the details of your modifications to the code of Section 22.5 in the ReadMe file which you hand in with your code. We need to have a sender sliding window mechanism for the retransmission of lost datagrams; and a receiver sliding window in order to ensure correct sequencing of received file contents, and some measure of flow control. You should implement something based on TCP Reno’s mechanisms, with cumulative acknowledgments, receiver window advertisements, and a congestion control mechanism I will explain in detail in class. For a reference on TCP’s mechanisms generally, see W. Richard Stevens, TCP/IP Illustrated, Volume 1 , especially Sections 20.2 - 20.4 of Chapter 20 , and Sections 21.1 - 21.8 of Chapter 21 . Bear in mind that our sequence numbers should count datagrams, not bytes as in TCP. Remember that the sender and receiver window sizes have to be set according to the argument values in client.in and server.in, respectively. Whenever the sender window becomes full and so ‘locks’, the server should print out a message to that effect on stdout. Similarly, whenever the receiver window ‘locks’, the client should print out a message on stdout. Be aware of the potential for deadlock when the receiver window ‘locks’. This situation is handled by having the receiver process send a duplicate ACK which acts as a window update when its window opens again (see Figure 20.3 and the discussion about it in TCP/IP Illustrated). However, this is not enough, because ACKs are not backed up by a timeout mechanism in the event they are lost. So we will also need to implement a persist timer driving window probes in the sender process (see Sections 22.1 & 22.2 in Chapter 22 of TCP/IP Illustrated). Note that you do not have to worry about the Silly Window Syndrome discussed in Section 22.3 of TCP/IP Illustrated since the receiver process consumes ‘full sized’ 512-byte messages from the receiver buffer (see 3. below). Report on the details of the ARQ mechanism you implemented in the ReadMe file you hand in. Indeed, you should report on all the TCP mechanisms you implemented in the ReadMe file, both the ones discussed here, and the ones I will be discussing in class. Make your datagram payload a fixed 512 bytes, inclusive of the file transfer protocol header (which must, at the very least, carry: the sequence number of the datagram; ACKs; and advertised window notifications). The client reads the file contents in its receive buffer and prints them out on stdout using a separate thread. This thread sits in a repetitive loop till all the file contents have been printed out, doing the following. It samples from an exponential distribution with mean µ milliseconds (read from the client.in file), sleeps for that number of milliseconds; wakes up to read and print all in-order file contents available in the receive buffer at that point; samples again from the exponential distribution; sleeps; and so on. The formula -1 × µ × ln( random( ) ) , where ln is the natural logarithm, yields variates from an exponential distribution with mean µ, based on the uniformly-distributed variates over ( 0 , 1 ) returned by random(). Note that you will need to implement some sort of mutual exclusion/semaphore mechanism on the client side so that the thread that sleeps and wakes up to consume from the receive buffer is not updating the state variables of the buffer at the same time as the main thread reading from the socket and depositing into the buffer is doing the same. Furthermore, we need to ensure that the main thread does not effectively monopolize the semaphore (and thus lock out for prolonged periods of time) the sleeping thread when the latter wakes up. See the textbook, Section 26.7, ‘Mutexes: Mutual Exclusion’, pp.697-701. You might also find Section 26.8, ‘Condition Variables’, pp.701-705, useful. You will need to devise some way by which the sender can notify the receiver when it has sent the last datagram of the file transfer, without the receiver mistaking that EOF marker as part of the file contents. (Also, note that the last data segment could be a “short” segment of less than 512 bytes – your client needs to be able to handle this correctly somehow.) When the sender receives an ACK for the last datagram of the transfer, the (child) server terminates. The parent server has to take care of cleaning up zombie children. Note that if we want a clean closing, the client process cannot simply terminate when the receiver ACKs the last datagram. This ACK could be lost, which would leave the (child) server process ‘hanging’, timing out, and retransmitting the last datagram. TCP attempts to deal with this problem by means of the TIME_WAIT state. You should have your receiver process behave similarly, sticking around in something akin to a TIME_WAIT state in case in case it needs to retransmit the ACK. In the ReadMe file you hand in, report on how you dealt with the issues raised here: sender notifying receiver of the last datagram, clean closing, and so on. Output Some of the output required from your program has been described in the section Operation above. I expect you to provide further output – clear, well-structured, well-laid-out, concise but sufficient and helpful – in the client and server windows by means of which we can trace the correct evolution of your TCP’s behaviour in all its intricacies : information (e.g., sequence number) on datagrams and acks sent and dropped, window advertisements, datagram retransmissions (and why : dup acks or RTO); entering/exiting Slow Start and Congestion Avoidance, ssthresh and cwnd values; sender and receiver windows locking/unlocking; etc., etc. . . . . The onus is on you to convince us that the TCP mechanisms you implemented are working correctly. Too many students do not put sufficient thought, creative imagination, time or effort into this. It is not the TA’s nor my responsibility to sit staring at an essentially blank screen, trying to summon up our paranormal psychology skills to figure out if your TCP implementation is really working correctly in all its very intricate aspects, simply because the transferred file seems to be printing o.k. in the client window. Nor is it our responsibility to strain our eyes and our patience wading through a mountain of obscure, ill-structured, hyper-messy, debugging-style output because, for example, your effort-conserving concept of what is ‘suitable’ is to dump your debugging output on us, relevant, irrelevant, and everything in between.
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arashstar1 / Bot LuaCode Issues 0 Pull requests 0 Pulse MaTaDoR/ 3233fdf V 5.7 MaTaDoR @MaTaDoRTeaMMaTaDoRTeaM committed on GitHub about 1 month ago 2 changed files 2,704 additions and 0 deletions cli/tg/tdcli.lua @@ -0,0 +1,2704 @@ +--[[ + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + MA 02110-1301, USA. + +]]-- + +-- Vector example form is like this: {[0] = v} or {v1, v2, v3, [0] = v} +-- If false or true crashed your telegram-cli, try to change true to 1 and false to 0 + +-- Main Bot Framework +local M = {} + +-- @chat_id = user, group, channel, and broadcast +-- @group_id = normal group +-- @channel_id = channel and broadcast +local function getChatId(chat_id) + local chat = {} + local chat_id = tostring(chat_id) + + if chat_id:match('^-100') then + local channel_id = chat_id:gsub('-100', '') + chat = {ID = channel_id, type = 'channel'} + else + local group_id = chat_id:gsub('-', '') + chat = {ID = group_id, type = 'group'} + end + + return chat +end + +local function getInputFile(file) + if file:match('/') then + infile = {ID = "InputFileLocal", path_ = file} + elseif file:match('^%d+$') then + infile = {ID = "InputFileId", id_ = file} + else + infile = {ID = "InputFilePersistentId", persistent_id_ = file} + end + + return infile +end + +-- User can send bold, italic, and monospace text uses HTML or Markdown format. +local function getParseMode(parse_mode) + if parse_mode then + local mode = parse_mode:lower() + + if mode == 'markdown' or mode == 'md' then + P = {ID = "TextParseModeMarkdown"} + elseif mode == 'html' then + P = {ID = "TextParseModeHTML"} + end + end + + return P +end + +-- Returns current authorization state, offline request +local function getAuthState(dl_cb, cmd) + tdcli_function ({ + ID = "GetAuthState", + }, dl_cb, cmd) +end + +M.getAuthState = getAuthState + +-- Sets user's phone number and sends authentication code to the user. +-- Works only when authGetState returns authStateWaitPhoneNumber. +-- If phone number is not recognized or another error has happened, returns an error. Otherwise returns authStateWaitCode +-- @phone_number User's phone number in any reasonable format +-- @allow_flash_call Pass True, if code can be sent via flash call to the specified phone number +-- @is_current_phone_number Pass true, if the phone number is used on the current device. Ignored if allow_flash_call is False +local function setAuthPhoneNumber(phone_number, allow_flash_call, is_current_phone_number, dl_cb, cmd) + tdcli_function ({ + ID = "SetAuthPhoneNumber", + phone_number_ = phone_number, + allow_flash_call_ = allow_flash_call, + is_current_phone_number_ = is_current_phone_number + }, dl_cb, cmd) +end + +M.setAuthPhoneNumber = setAuthPhoneNumber + +-- Resends authentication code to the user. +-- Works only when authGetState returns authStateWaitCode and next_code_type of result is not null. +-- Returns authStateWaitCode on success +local function resendAuthCode(dl_cb, cmd) + tdcli_function ({ + ID = "ResendAuthCode", + }, dl_cb, cmd) +end + +M.resendAuthCode = resendAuthCode + +-- Checks authentication code. +-- Works only when authGetState returns authStateWaitCode. +-- Returns authStateWaitPassword or authStateOk on success +-- @code Verification code from SMS, Telegram message, voice call or flash call +-- @first_name User first name, if user is yet not registered, 1-255 characters +-- @last_name Optional user last name, if user is yet not registered, 0-255 characters +local function checkAuthCode(code, first_name, last_name, dl_cb, cmd) + tdcli_function ({ + ID = "CheckAuthCode", + code_ = code, + first_name_ = first_name, + last_name_ = last_name + }, dl_cb, cmd) +end + +M.checkAuthCode = checkAuthCode + +-- Checks password for correctness. +-- Works only when authGetState returns authStateWaitPassword. +-- Returns authStateOk on success +-- @password Password to check +local function checkAuthPassword(password, dl_cb, cmd) + tdcli_function ({ + ID = "CheckAuthPassword", + password_ = password + }, dl_cb, cmd) +end + +M.checkAuthPassword = checkAuthPassword + +-- Requests to send password recovery code to email. +-- Works only when authGetState returns authStateWaitPassword. +-- Returns authStateWaitPassword on success +local function requestAuthPasswordRecovery(dl_cb, cmd) + tdcli_function ({ + ID = "RequestAuthPasswordRecovery", + }, dl_cb, cmd) +end + +M.requestAuthPasswordRecovery = requestAuthPasswordRecovery + +-- Recovers password with recovery code sent to email. +-- Works only when authGetState returns authStateWaitPassword. +-- Returns authStateOk on success +-- @recovery_code Recovery code to check +local function recoverAuthPassword(recovery_code, dl_cb, cmd) + tdcli_function ({ + ID = "RecoverAuthPassword", + recovery_code_ = recovery_code + }, dl_cb, cmd) +end + +M.recoverAuthPassword = recoverAuthPassword + +-- Logs out user. +-- If force == false, begins to perform soft log out, returns authStateLoggingOut after completion. +-- If force == true then succeeds almost immediately without cleaning anything at the server, but returns error with code 401 and description "Unauthorized" +-- @force If true, just delete all local data. Session will remain in list of active sessions +local function resetAuth(force, dl_cb, cmd) + tdcli_function ({ + ID = "ResetAuth", + force_ = force or nil + }, dl_cb, cmd) +end + +M.resetAuth = resetAuth + +-- Check bot's authentication token to log in as a bot. +-- Works only when authGetState returns authStateWaitPhoneNumber. +-- Can be used instead of setAuthPhoneNumber and checkAuthCode to log in. +-- Returns authStateOk on success +-- @token Bot token +local function checkAuthBotToken(token, dl_cb, cmd) + tdcli_function ({ + ID = "CheckAuthBotToken", + token_ = token + }, dl_cb, cmd) +end + +M.checkAuthBotToken = checkAuthBotToken + +-- Returns current state of two-step verification +local function getPasswordState(dl_cb, cmd) + tdcli_function ({ + ID = "GetPasswordState", + }, dl_cb, cmd) +end + +M.getPasswordState = getPasswordState + +-- Changes user password. +-- If new recovery email is specified, then error EMAIL_UNCONFIRMED is returned and password change will not be applied until email confirmation. +-- Application should call getPasswordState from time to time to check if email is already confirmed +-- @old_password Old user password +-- @new_password New user password, may be empty to remove the password +-- @new_hint New password hint, can be empty +-- @set_recovery_email Pass True, if recovery email should be changed +-- @new_recovery_email New recovery email, may be empty +local function setPassword(old_password, new_password, new_hint, set_recovery_email, new_recovery_email, dl_cb, cmd) + tdcli_function ({ + ID = "SetPassword", + old_password_ = old_password, + new_password_ = new_password, + new_hint_ = new_hint, + set_recovery_email_ = set_recovery_email, + new_recovery_email_ = new_recovery_email + }, dl_cb, cmd) +end + +M.setPassword = setPassword + +-- Returns set up recovery email. +-- This method can be used to verify a password provided by the user +-- @password Current user password +local function getRecoveryEmail(password, dl_cb, cmd) + tdcli_function ({ + ID = "GetRecoveryEmail", + password_ = password + }, dl_cb, cmd) +end + +M.getRecoveryEmail = getRecoveryEmail + +-- Changes user recovery email. +-- If new recovery email is specified, then error EMAIL_UNCONFIRMED is returned and email will not be changed until email confirmation. +-- Application should call getPasswordState from time to time to check if email is already confirmed. +-- If new_recovery_email coincides with the current set up email succeeds immediately and aborts all other requests waiting for email confirmation +-- @password Current user password +-- @new_recovery_email New recovery email +local function setRecoveryEmail(password, new_recovery_email, dl_cb, cmd) + tdcli_function ({ + ID = "SetRecoveryEmail", + password_ = password, + new_recovery_email_ = new_recovery_email + }, dl_cb, cmd) +end + +M.setRecoveryEmail = setRecoveryEmail + +-- Requests to send password recovery code to email +local function requestPasswordRecovery(dl_cb, cmd) + tdcli_function ({ + ID = "RequestPasswordRecovery", + }, dl_cb, cmd) +end + +M.requestPasswordRecovery = requestPasswordRecovery + +-- Recovers password with recovery code sent to email +-- @recovery_code Recovery code to check +local function recoverPassword(recovery_code, dl_cb, cmd) + tdcli_function ({ + ID = "RecoverPassword", + recovery_code_ = tostring(recovery_code) + }, dl_cb, cmd) +end + +M.recoverPassword = recoverPassword + +-- Returns current logged in user +local function getMe(dl_cb, cmd) + tdcli_function ({ + ID = "GetMe", + }, dl_cb, cmd) +end + +M.getMe = getMe + +-- Returns information about a user by its identifier, offline request if current user is not a bot +-- @user_id User identifier +local function getUser(user_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetUser", + user_id_ = user_id + }, dl_cb, cmd) +end + +M.getUser = getUser + +-- Returns full information about a user by its identifier +-- @user_id User identifier +local function getUserFull(user_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetUserFull", + user_id_ = user_id + }, dl_cb, cmd) +end + +M.getUserFull = getUserFull + +-- Returns information about a group by its identifier, offline request if current user is not a bot +-- @group_id Group identifier +local function getGroup(group_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetGroup", + group_id_ = getChatId(group_id).ID + }, dl_cb, cmd) +end + +M.getGroup = getGroup + +-- Returns full information about a group by its identifier +-- @group_id Group identifier +local function getGroupFull(group_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetGroupFull", + group_id_ = getChatId(group_id).ID + }, dl_cb, cmd) +end + +M.getGroupFull = getGroupFull + +-- Returns information about a channel by its identifier, offline request if current user is not a bot +-- @channel_id Channel identifier +local function getChannel(channel_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetChannel", + channel_id_ = getChatId(channel_id).ID + }, dl_cb, cmd) +end + +M.getChannel = getChannel + +-- Returns full information about a channel by its identifier, cached for at most 1 minute +-- @channel_id Channel identifier +local function getChannelFull(channel_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetChannelFull", + channel_id_ = getChatId(channel_id).ID + }, dl_cb, cmd) +end + +M.getChannelFull = getChannelFull + +-- Returns information about a secret chat by its identifier, offline request +-- @secret_chat_id Secret chat identifier +local function getSecretChat(secret_chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetSecretChat", + secret_chat_id_ = secret_chat_id + }, dl_cb, cmd) +end + +M.getSecretChat = getSecretChat + +-- Returns information about a chat by its identifier, offline request if current user is not a bot +-- @chat_id Chat identifier +local function getChat(chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetChat", + chat_id_ = chat_id + }, dl_cb, cmd) +end + +M.getChat = getChat + +-- Returns information about a message +-- @chat_id Identifier of the chat, message belongs to +-- @message_id Identifier of the message to get +local function getMessage(chat_id, message_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetMessage", + chat_id_ = chat_id, + message_id_ = message_id + }, dl_cb, cmd) +end + +M.getMessage = getMessage + +-- Returns information about messages. +-- If message is not found, returns null on the corresponding position of the result +-- @chat_id Identifier of the chat, messages belongs to +-- @message_ids Identifiers of the messages to get +local function getMessages(chat_id, message_ids, dl_cb, cmd) + tdcli_function ({ + ID = "GetMessages", + chat_id_ = chat_id, + message_ids_ = message_ids -- vector + }, dl_cb, cmd) +end + +M.getMessages = getMessages + +-- Returns information about a file, offline request +-- @file_id Identifier of the file to get +local function getFile(file_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetFile", + file_id_ = file_id + }, dl_cb, cmd) +end + +M.getFile = getFile + +-- Returns information about a file by its persistent id, offline request +-- @persistent_file_id Persistent identifier of the file to get +local function getFilePersistent(persistent_file_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetFilePersistent", + persistent_file_id_ = persistent_file_id + }, dl_cb, cmd) +end + +M.getFilePersistent = getFilePersistent + +-- Returns list of chats in the right order, chats are sorted by (order, chat_id) in decreasing order. +-- For example, to get list of chats from the beginning, the offset_order should be equal 2^63 - 1 +-- @offset_order Chat order to return chats from +-- @offset_chat_id Chat identifier to return chats from +-- @limit Maximum number of chats to be returned +local function getChats(offset_order, offset_chat_id, limit, dl_cb, cmd) + if not limit or limit > 20 then + limit = 20 + end + + tdcli_function ({ + ID = "GetChats", + offset_order_ = offset_order or 9223372036854775807, + offset_chat_id_ = offset_chat_id or 0, + limit_ = limit + }, dl_cb, cmd) +end + +M.getChats = getChats + +-- Searches public chat by its username. +-- Currently only private and channel chats can be public. +-- Returns chat if found, otherwise some error is returned +-- @username Username to be resolved +local function searchPublicChat(username, dl_cb, cmd) + tdcli_function ({ + ID = "SearchPublicChat", + username_ = username + }, dl_cb, cmd) +end + +M.searchPublicChat = searchPublicChat + +-- Searches public chats by prefix of their username. +-- Currently only private and channel (including supergroup) chats can be public. +-- Returns meaningful number of results. +-- Returns nothing if length of the searched username prefix is less than 5. +-- Excludes private chats with contacts from the results +-- @username_prefix Prefix of the username to search +local function searchPublicChats(username_prefix, dl_cb, cmd) + tdcli_function ({ + ID = "SearchPublicChats", + username_prefix_ = username_prefix + }, dl_cb, cmd) +end + +M.searchPublicChats = searchPublicChats + +-- Searches for specified query in the title and username of known chats, offline request. +-- Returns chats in the order of them in the chat list +-- @query Query to search for, if query is empty, returns up to 20 recently found chats +-- @limit Maximum number of chats to be returned +local function searchChats(query, limit, dl_cb, cmd) + if not limit or limit > 20 then + limit = 20 + end + + tdcli_function ({ + ID = "SearchChats", + query_ = query, + limit_ = limit + }, dl_cb, cmd) +end + +M.searchChats = searchChats + +-- Adds chat to the list of recently found chats. +-- The chat is added to the beginning of the list. +-- If the chat is already in the list, at first it is removed from the list +-- @chat_id Identifier of the chat to add +local function addRecentlyFoundChat(chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "AddRecentlyFoundChat", + chat_id_ = chat_id + }, dl_cb, cmd) +end + +M.addRecentlyFoundChat = addRecentlyFoundChat + +-- Deletes chat from the list of recently found chats +-- @chat_id Identifier of the chat to delete +local function deleteRecentlyFoundChat(chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteRecentlyFoundChat", + chat_id_ = chat_id + }, dl_cb, cmd) +end + +M.deleteRecentlyFoundChat = deleteRecentlyFoundChat + +-- Clears list of recently found chats +local function deleteRecentlyFoundChats(dl_cb, cmd) + tdcli_function ({ + ID = "DeleteRecentlyFoundChats", + }, dl_cb, cmd) +end + +M.deleteRecentlyFoundChats = deleteRecentlyFoundChats + +-- Returns list of common chats with an other given user. +-- Chats are sorted by their type and creation date +-- @user_id User identifier +-- @offset_chat_id Chat identifier to return chats from, use 0 for the first request +-- @limit Maximum number of chats to be returned, up to 100 +local function getCommonChats(user_id, offset_chat_id, limit, dl_cb, cmd) + if not limit or limit > 100 then + limit = 100 + end + + tdcli_function ({ + ID = "GetCommonChats", + user_id_ = user_id, + offset_chat_id_ = offset_chat_id, + limit_ = limit + }, dl_cb, cmd) +end + +M.getCommonChats = getCommonChats + +-- Returns messages in a chat. +-- Automatically calls openChat. +-- Returns result in reverse chronological order, i.e. in order of decreasing message.message_id +-- @chat_id Chat identifier +-- @from_message_id Identifier of the message near which we need a history, you can use 0 to get results from the beginning, i.e. from oldest to newest +-- @offset Specify 0 to get results exactly from from_message_id or negative offset to get specified message and some newer messages +-- @limit Maximum number of messages to be returned, should be positive and can't be greater than 100. +-- If offset is negative, limit must be greater than -offset. +-- There may be less than limit messages returned even the end of the history is not reached +local function getChatHistory(chat_id, from_message_id, offset, limit, dl_cb, cmd) + if not limit or limit > 100 then + limit = 100 + end + + tdcli_function ({ + ID = "GetChatHistory", + chat_id_ = chat_id, + from_message_id_ = from_message_id, + offset_ = offset or 0, + limit_ = limit + }, dl_cb, cmd) +end + +M.getChatHistory = getChatHistory + +-- Deletes all messages in the chat. +-- Can't be used for channel chats +-- @chat_id Chat identifier +-- @remove_from_chat_list Pass true, if chat should be removed from the chat list +local function deleteChatHistory(chat_id, remove_from_chat_list, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteChatHistory", + chat_id_ = chat_id, + remove_from_chat_list_ = remove_from_chat_list + }, dl_cb, cmd) +end + +M.deleteChatHistory = deleteChatHistory + +-- Searches for messages with given words in the chat. +-- Returns result in reverse chronological order, i. e. in order of decreasimg message_id. +-- Doesn't work in secret chats +-- @chat_id Chat identifier to search in +-- @query Query to search for +-- @from_message_id Identifier of the message from which we need a history, you can use 0 to get results from beginning +-- @limit Maximum number of messages to be returned, can't be greater than 100 +-- @filter Filter for content of searched messages +-- filter = Empty|Animation|Audio|Document|Photo|Video|Voice|PhotoAndVideo|Url|ChatPhoto +local function searchChatMessages(chat_id, query, from_message_id, limit, filter, dl_cb, cmd) + if not limit or limit > 100 then + limit = 100 + end + + tdcli_function ({ + ID = "SearchChatMessages", + chat_id_ = chat_id, + query_ = query, + from_message_id_ = from_message_id, + limit_ = limit, + filter_ = { + ID = 'SearchMessagesFilter' .. filter + }, + }, dl_cb, cmd) +end + +M.searchChatMessages = searchChatMessages + +-- Searches for messages in all chats except secret chats. Returns result in reverse chronological order, i. e. in order of decreasing (date, chat_id, message_id) +-- @query Query to search for +-- @offset_date Date of the message to search from, you can use 0 or any date in the future to get results from the beginning +-- @offset_chat_id Chat identifier of the last found message or 0 for the first request +-- @offset_message_id Message identifier of the last found message or 0 for the first request +-- @limit Maximum number of messages to be returned, can't be greater than 100 +local function searchMessages(query, offset_date, offset_chat_id, offset_message_id, limit, dl_cb, cmd) + if not limit or limit > 100 then + limit = 100 + end + + tdcli_function ({ + ID = "SearchMessages", + query_ = query, + offset_date_ = offset_date, + offset_chat_id_ = offset_chat_id, + offset_message_id_ = offset_message_id, + limit_ = limit + }, dl_cb, cmd) +end + +M.searchMessages = searchMessages + +-- Invites bot to a chat (if it is not in the chat) and send /start to it. +-- Bot can't be invited to a private chat other than chat with the bot. +-- Bots can't be invited to broadcast channel chats and secret chats. +-- Returns sent message. +-- UpdateChatTopMessage will not be sent, so returned message should be used to update chat top message +-- @bot_user_id Identifier of the bot +-- @chat_id Identifier of the chat +-- @parameter Hidden parameter sent to bot for deep linking (https://api.telegram.org/bots#deep-linking) +-- parameter=start|startgroup or custom as defined by bot creator +local function sendBotStartMessage(bot_user_id, chat_id, parameter, dl_cb, cmd) + tdcli_function ({ + ID = "SendBotStartMessage", + bot_user_id_ = bot_user_id, + chat_id_ = chat_id, + parameter_ = parameter + }, dl_cb, cmd) +end + +M.sendBotStartMessage = sendBotStartMessage + +-- Sends result of the inline query as a message. +-- Returns sent message. +-- UpdateChatTopMessage will not be sent, so returned message should be used to update chat top message. +-- Always clears chat draft message +-- @chat_id Chat to send message +-- @reply_to_message_id Identifier of a message to reply to or 0 +-- @disable_notification Pass true, to disable notification about the message, doesn't works in secret chats +-- @from_background Pass true, if the message is sent from background +-- @query_id Identifier of the inline query +-- @result_id Identifier of the inline result +local function sendInlineQueryResultMessage(chat_id, reply_to_message_id, disable_notification, from_background, query_id, result_id, dl_cb, cmd) + tdcli_function ({ + ID = "SendInlineQueryResultMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + query_id_ = query_id, + result_id_ = result_id + }, dl_cb, cmd) +end + +M.sendInlineQueryResultMessage = sendInlineQueryResultMessage + +-- Forwards previously sent messages. +-- Returns forwarded messages in the same order as message identifiers passed in message_ids. +-- If message can't be forwarded, null will be returned instead of the message. +-- UpdateChatTopMessage will not be sent, so returned messages should be used to update chat top message +-- @chat_id Identifier of a chat to forward messages +-- @from_chat_id Identifier of a chat to forward from +-- @message_ids Identifiers of messages to forward +-- @disable_notification Pass true, to disable notification about the message, doesn't works if messages are forwarded to secret chat +-- @from_background Pass true, if the message is sent from background +local function forwardMessages(chat_id, from_chat_id, message_ids, disable_notification, dl_cb, cmd) + tdcli_function ({ + ID = "ForwardMessages", + chat_id_ = chat_id, + from_chat_id_ = from_chat_id, + message_ids_ = message_ids, -- vector + disable_notification_ = disable_notification, + from_background_ = 1 + }, dl_cb, cmd) +end + +M.forwardMessages = forwardMessages + +-- Changes current ttl setting in a secret chat and sends corresponding message +-- @chat_id Chat identifier +-- @ttl New value of ttl in seconds +local function sendChatSetTtlMessage(chat_id, ttl, dl_cb, cmd) + tdcli_function ({ + ID = "SendChatSetTtlMessage", + chat_id_ = chat_id, + ttl_ = ttl + }, dl_cb, cmd) +end + +M.sendChatSetTtlMessage = sendChatSetTtlMessage + +-- Deletes messages. +-- UpdateDeleteMessages will not be sent for messages deleted through that function +-- @chat_id Chat identifier +-- @message_ids Identifiers of messages to delete +local function deleteMessages(chat_id, message_ids, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteMessages", + chat_id_ = chat_id, + message_ids_ = message_ids -- vector + }, dl_cb, cmd) +end + +M.deleteMessages = deleteMessages + +-- Deletes all messages in the chat sent by the specified user. +-- Works only in supergroup channel chats, needs appropriate privileges +-- @chat_id Chat identifier +-- @user_id User identifier +local function deleteMessagesFromUser(chat_id, user_id, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteMessagesFromUser", + chat_id_ = chat_id, + user_id_ = user_id + }, dl_cb, cmd) +end + +M.deleteMessagesFromUser = deleteMessagesFromUser + +-- Edits text of text or game message. +-- Non-bots can edit message in a limited period of time. +-- Returns edited message after edit is complete server side +-- @chat_id Chat the message belongs to +-- @message_id Identifier of the message +-- @reply_markup Bots only. New message reply markup +-- @input_message_content New text content of the message. Should be of type InputMessageText +local function editMessageText(chat_id, message_id, reply_markup, text, disable_web_page_preview, parse_mode, dl_cb, cmd) + local TextParseMode = getParseMode(parse_mode) + + tdcli_function ({ + ID = "EditMessageText", + chat_id_ = chat_id, + message_id_ = message_id, + reply_markup_ = reply_markup, -- reply_markup:ReplyMarkup + input_message_content_ = { + ID = "InputMessageText", + text_ = text, + disable_web_page_preview_ = disable_web_page_preview, + clear_draft_ = 0, + entities_ = {}, + parse_mode_ = TextParseMode, + }, + }, dl_cb, cmd) +end + +M.editMessageText = editMessageText + +-- Edits message content caption. +-- Non-bots can edit message in a limited period of time. +-- Returns edited message after edit is complete server side +-- @chat_id Chat the message belongs to +-- @message_id Identifier of the message +-- @reply_markup Bots only. New message reply markup +-- @caption New message content caption, 0-200 characters +local function editMessageCaption(chat_id, message_id, reply_markup, caption, dl_cb, cmd) + tdcli_function ({ + ID = "EditMessageCaption", + chat_id_ = chat_id, + message_id_ = message_id, + reply_markup_ = reply_markup, -- reply_markup:ReplyMarkup + caption_ = caption + }, dl_cb, cmd) +end + +M.editMessageCaption = editMessageCaption + +-- Bots only. +-- Edits message reply markup. +-- Returns edited message after edit is complete server side +-- @chat_id Chat the message belongs to +-- @message_id Identifier of the message +-- @reply_markup New message reply markup +local function editMessageReplyMarkup(inline_message_id, reply_markup, caption, dl_cb, cmd) + tdcli_function ({ + ID = "EditInlineMessageCaption", + inline_message_id_ = inline_message_id, + reply_markup_ = reply_markup, -- reply_markup:ReplyMarkup + caption_ = caption + }, dl_cb, cmd) +end + +M.editMessageReplyMarkup = editMessageReplyMarkup + +-- Bots only. +-- Edits text of an inline text or game message sent via bot +-- @inline_message_id Inline message identifier +-- @reply_markup New message reply markup +-- @input_message_content New text content of the message. Should be of type InputMessageText +local function editInlineMessageText(inline_message_id, reply_markup, text, disable_web_page_preview, dl_cb, cmd) + tdcli_function ({ + ID = "EditInlineMessageText", + inline_message_id_ = inline_message_id, + reply_markup_ = reply_markup, -- reply_markup:ReplyMarkup + input_message_content_ = { + ID = "InputMessageText", + text_ = text, + disable_web_page_preview_ = disable_web_page_preview, + clear_draft_ = 0, + entities_ = {} + }, + }, dl_cb, cmd) +end + +M.editInlineMessageText = editInlineMessageText + +-- Bots only. +-- Edits caption of an inline message content sent via bot +-- @inline_message_id Inline message identifier +-- @reply_markup New message reply markup +-- @caption New message content caption, 0-200 characters +local function editInlineMessageCaption(inline_message_id, reply_markup, caption, dl_cb, cmd) + tdcli_function ({ + ID = "EditInlineMessageCaption", + inline_message_id_ = inline_message_id, + reply_markup_ = reply_markup, -- reply_markup:ReplyMarkup + caption_ = caption + }, dl_cb, cmd) +end + +M.editInlineMessageCaption = editInlineMessageCaption + +-- Bots only. +-- Edits reply markup of an inline message sent via bot +-- @inline_message_id Inline message identifier +-- @reply_markup New message reply markup +local function editInlineMessageReplyMarkup(inline_message_id, reply_markup, dl_cb, cmd) + tdcli_function ({ + ID = "EditInlineMessageReplyMarkup", + inline_message_id_ = inline_message_id, + reply_markup_ = reply_markup -- reply_markup:ReplyMarkup + }, dl_cb, cmd) +end + +M.editInlineMessageReplyMarkup = editInlineMessageReplyMarkup + + +-- Sends inline query to a bot and returns its results. +-- Unavailable for bots +-- @bot_user_id Identifier of the bot send query to +-- @chat_id Identifier of the chat, where the query is sent +-- @user_location User location, only if needed +-- @query Text of the query +-- @offset Offset of the first entry to return +local function getInlineQueryResults(bot_user_id, chat_id, latitude, longitude, query, offset, dl_cb, cmd) + tdcli_function ({ + ID = "GetInlineQueryResults", + bot_user_id_ = bot_user_id, + chat_id_ = chat_id, + user_location_ = { + ID = "Location", + latitude_ = latitude, + longitude_ = longitude + }, + query_ = query, + offset_ = offset + }, dl_cb, cmd) +end + +M.getInlineQueryResults = getInlineQueryResults + +-- Bots only. +-- Sets result of the inline query +-- @inline_query_id Identifier of the inline query +-- @is_personal Does result of the query can be cached only for specified user +-- @results Results of the query +-- @cache_time Allowed time to cache results of the query in seconds +-- @next_offset Offset for the next inline query, pass empty string if there is no more results +-- @switch_pm_text If non-empty, this text should be shown on the button, which opens private chat with the bot and sends bot start message with parameter switch_pm_parameter +-- @switch_pm_parameter Parameter for the bot start message +local function answerInlineQuery(inline_query_id, is_personal, cache_time, next_offset, switch_pm_text, switch_pm_parameter, dl_cb, cmd) + tdcli_function ({ + ID = "AnswerInlineQuery", + inline_query_id_ = inline_query_id, + is_personal_ = is_personal, + results_ = results, --vector<InputInlineQueryResult>, + cache_time_ = cache_time, + next_offset_ = next_offset, + switch_pm_text_ = switch_pm_text, + switch_pm_parameter_ = switch_pm_parameter + }, dl_cb, cmd) +end + +M.answerInlineQuery = answerInlineQuery + +-- Sends callback query to a bot and returns answer to it. +-- Unavailable for bots +-- @chat_id Identifier of the chat with a message +-- @message_id Identifier of the message, from which the query is originated +-- @payload Query payload +-- @text Text of the answer +-- @show_alert If true, an alert should be shown to the user instead of a toast +-- @url URL to be open +local function getCallbackQueryAnswer(chat_id, message_id, text, show_alert, url, dl_cb, cmd) + tdcli_function ({ + ID = "GetCallbackQueryAnswer", + chat_id_ = chat_id, + message_id_ = message_id, + payload_ = { + ID = "CallbackQueryAnswer", + text_ = text, + show_alert_ = show_alert, + url_ = url + }, + }, dl_cb, cmd) +end + +M.getCallbackQueryAnswer = getCallbackQueryAnswer + +-- Bots only. +-- Sets result of the callback query +-- @callback_query_id Identifier of the callback query +-- @text Text of the answer +-- @show_alert If true, an alert should be shown to the user instead of a toast +-- @url Url to be opened +-- @cache_time Allowed time to cache result of the query in seconds +local function answerCallbackQuery(callback_query_id, text, show_alert, url, cache_time, dl_cb, cmd) + tdcli_function ({ + ID = "AnswerCallbackQuery", + callback_query_id_ = callback_query_id, + text_ = text, + show_alert_ = show_alert, + url_ = url, + cache_time_ = cache_time + }, dl_cb, cmd) +end + +M.answerCallbackQuery = answerCallbackQuery + +-- Bots only. +-- Updates game score of the specified user in the game +-- @chat_id Chat a message with the game belongs to +-- @message_id Identifier of the message +-- @edit_message True, if message should be edited +-- @user_id User identifier +-- @score New score +-- @force Pass True to update the score even if it decreases. If score is 0, user will be deleted from the high scores table +local function setGameScore(chat_id, message_id, edit_message, user_id, score, force, dl_cb, cmd) + tdcli_function ({ + ID = "SetGameScore", + chat_id_ = chat_id, + message_id_ = message_id, + edit_message_ = edit_message, + user_id_ = user_id, + score_ = score, + force_ = force + }, dl_cb, cmd) +end + +M.setGameScore = setGameScore + +-- Bots only. +-- Updates game score of the specified user in the game +-- @inline_message_id Inline message identifier +-- @edit_message True, if message should be edited +-- @user_id User identifier +-- @score New score +-- @force Pass True to update the score even if it decreases. If score is 0, user will be deleted from the high scores table +local function setInlineGameScore(inline_message_id, edit_message, user_id, score, force, dl_cb, cmd) + tdcli_function ({ + ID = "SetInlineGameScore", + inline_message_id_ = inline_message_id, + edit_message_ = edit_message, + user_id_ = user_id, + score_ = score, + force_ = force + }, dl_cb, cmd) +end + +M.setInlineGameScore = setInlineGameScore + +-- Bots only. +-- Returns game high scores and some part of the score table around of the specified user in the game +-- @chat_id Chat a message with the game belongs to +-- @message_id Identifier of the message +-- @user_id User identifie +local function getGameHighScores(chat_id, message_id, user_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetGameHighScores", + chat_id_ = chat_id, + message_id_ = message_id, + user_id_ = user_id + }, dl_cb, cmd) +end + +M.getGameHighScores = getGameHighScores + +-- Bots only. +-- Returns game high scores and some part of the score table around of the specified user in the game +-- @inline_message_id Inline message identifier +-- @user_id User identifier +local function getInlineGameHighScores(inline_message_id, user_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetInlineGameHighScores", + inline_message_id_ = inline_message_id, + user_id_ = user_id + }, dl_cb, cmd) +end + +M.getInlineGameHighScores = getInlineGameHighScores + +-- Deletes default reply markup from chat. +-- This method needs to be called after one-time keyboard or ForceReply reply markup has been used. +-- UpdateChatReplyMarkup will be send if reply markup will be changed +-- @chat_id Chat identifier +-- @message_id Message identifier of used keyboard +local function deleteChatReplyMarkup(chat_id, message_id, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteChatReplyMarkup", + chat_id_ = chat_id, + message_id_ = message_id + }, dl_cb, cmd) +end + +M.deleteChatReplyMarkup = deleteChatReplyMarkup + +-- Sends notification about user activity in a chat +-- @chat_id Chat identifier +-- @action Action description +-- action = Typing|Cancel|RecordVideo|UploadVideo|RecordVoice|UploadVoice|UploadPhoto|UploadDocument|GeoLocation|ChooseContact|StartPlayGame +local function sendChatAction(chat_id, action, progress, dl_cb, cmd) + tdcli_function ({ + ID = "SendChatAction", + chat_id_ = chat_id, + action_ = { + ID = "SendMessage" .. action .. "Action", + progress_ = progress or 100 + } + }, dl_cb, cmd) +end + +M.sendChatAction = sendChatAction + +-- Sends notification about screenshot taken in a chat. +-- Works only in secret chats +-- @chat_id Chat identifier +local function sendChatScreenshotTakenNotification(chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "SendChatScreenshotTakenNotification", + chat_id_ = chat_id + }, dl_cb, cmd) +end + +M.sendChatScreenshotTakenNotification = sendChatScreenshotTakenNotification + +-- Chat is opened by the user. +-- Many useful activities depends on chat being opened or closed. For example, in channels all updates are received only for opened chats +-- @chat_id Chat identifier +local function openChat(chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "OpenChat", + chat_id_ = chat_id + }, dl_cb, cmd) +end + +M.openChat = openChat + +-- Chat is closed by the user. +-- Many useful activities depends on chat being opened or closed. +-- @chat_id Chat identifier +local function closeChat(chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "CloseChat", + chat_id_ = chat_id + }, dl_cb, cmd) +end + +M.closeChat = closeChat + +-- Messages are viewed by the user. +-- Many useful activities depends on message being viewed. For example, marking messages as read, incrementing of view counter, updating of view counter, removing of deleted messages in channels +-- @chat_id Chat identifier +-- @message_ids Identifiers of viewed messages +local function viewMessages(chat_id, message_ids, dl_cb, cmd) + tdcli_function ({ + ID = "ViewMessages", + chat_id_ = chat_id, + message_ids_ = message_ids -- vector + }, dl_cb, cmd) +end + +M.viewMessages = viewMessages + +-- Message content is opened, for example the user has opened a photo, a video, a document, a location or a venue or have listened to an audio or a voice message +-- @chat_id Chat identifier of the message +-- @message_id Identifier of the message with opened content +local function openMessageContent(chat_id, message_id, dl_cb, cmd) + tdcli_function ({ + ID = "OpenMessageContent", + chat_id_ = chat_id, + message_id_ = message_id + }, dl_cb, cmd) +end + +M.openMessageContent = openMessageContent + +-- Returns existing chat corresponding to the given user +-- @user_id User identifier +local function createPrivateChat(user_id, dl_cb, cmd) + tdcli_function ({ + ID = "CreatePrivateChat", + user_id_ = user_id + }, dl_cb, cmd) +end + +M.createPrivateChat = createPrivateChat + +-- Returns existing chat corresponding to the known group +-- @group_id Group identifier +local function createGroupChat(group_id, dl_cb, cmd) + tdcli_function ({ + ID = "CreateGroupChat", + group_id_ = getChatId(group_id).ID + }, dl_cb, cmd) +end + +M.createGroupChat = createGroupChat + +-- Returns existing chat corresponding to the known channel +-- @channel_id Channel identifier +local function createChannelChat(channel_id, dl_cb, cmd) + tdcli_function ({ + ID = "CreateChannelChat", + channel_id_ = getChatId(channel_id).ID + }, dl_cb, cmd) +end + +M.createChannelChat = createChannelChat + +-- Returns existing chat corresponding to the known secret chat +-- @secret_chat_id SecretChat identifier +local function createSecretChat(secret_chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "CreateSecretChat", + secret_chat_id_ = secret_chat_id + }, dl_cb, cmd) +end + +M.createSecretChat = createSecretChat + +-- Creates new group chat and send corresponding messageGroupChatCreate, returns created chat +-- @user_ids Identifiers of users to add to the group +-- @title Title of new group chat, 0-255 characters +local function createNewGroupChat(user_ids, title, dl_cb, cmd) + tdcli_function ({ + ID = "CreateNewGroupChat", + user_ids_ = user_ids, -- vector + title_ = title + }, dl_cb, cmd) +end + +M.createNewGroupChat = createNewGroupChat + +-- Creates new channel chat and send corresponding messageChannelChatCreate, returns created chat +-- @title Title of new channel chat, 0-255 characters +-- @is_supergroup True, if supergroup chat should be created +-- @about Information about the channel, 0-255 characters +local function createNewChannelChat(title, is_supergroup, about, dl_cb, cmd) + tdcli_function ({ + ID = "CreateNewChannelChat", + title_ = title, + is_supergroup_ = is_supergroup, + about_ = about + }, dl_cb, cmd) +end + +M.createNewChannelChat = createNewChannelChat + +-- Creates new secret chat, returns created chat +-- @user_id Identifier of a user to create secret chat with +local function createNewSecretChat(user_id, dl_cb, cmd) + tdcli_function ({ + ID = "CreateNewSecretChat", + user_id_ = user_id + }, dl_cb, cmd) +end + +M.createNewSecretChat = createNewSecretChat + +-- Creates new channel supergroup chat from existing group chat and send corresponding messageChatMigrateTo and messageChatMigrateFrom. Deactivates group +-- @chat_id Group chat identifier +local function migrateGroupChatToChannelChat(chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "MigrateGroupChatToChannelChat", + chat_id_ = chat_id + }, dl_cb, cmd) +end + +M.migrateGroupChatToChannelChat = migrateGroupChatToChannelChat + +-- Changes chat title. +-- Title can't be changed for private chats. +-- Title will not change until change will be synchronized with the server. +-- Title will not be changed if application is killed before it can send request to the server. +-- There will be update about change of the title on success. Otherwise error will be returned +-- @chat_id Chat identifier +-- @title New title of a chat, 0-255 characters +local function changeChatTitle(chat_id, title, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeChatTitle", + chat_id_ = chat_id, + title_ = title + }, dl_cb, cmd) +end + +M.changeChatTitle = changeChatTitle + +-- Changes chat photo. +-- Photo can't be changed for private chats. +-- Photo will not change until change will be synchronized with the server. +-- Photo will not be changed if application is killed before it can send request to the server. +-- There will be update about change of the photo on success. Otherwise error will be returned +-- @chat_id Chat identifier +-- @photo New chat photo. You can use zero InputFileId to delete photo. Files accessible only by HTTP URL are not acceptable +local function changeChatPhoto(chat_id, photo, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeChatPhoto", + chat_id_ = chat_id, + photo_ = getInputFile(photo) + }, dl_cb, cmd) +end + +M.changeChatPhoto = changeChatPhoto + +-- Changes chat draft message +-- @chat_id Chat identifier +-- @draft_message New draft message, nullable +local function changeChatDraftMessage(chat_id, reply_to_message_id, text, disable_web_page_preview, clear_draft, parse_mode, dl_cb, cmd) + local TextParseMode = getParseMode(parse_mode) + + tdcli_function ({ + ID = "ChangeChatDraftMessage", + chat_id_ = chat_id, + draft_message_ = { + ID = "DraftMessage", + reply_to_message_id_ = reply_to_message_id, + input_message_text_ = { + ID = "InputMessageText", + text_ = text, + disable_web_page_preview_ = disable_web_page_preview, + clear_draft_ = clear_draft, + entities_ = {}, + parse_mode_ = TextParseMode, + }, + }, + }, dl_cb, cmd) +end + +M.changeChatDraftMessage = changeChatDraftMessage + +-- Adds new member to chat. +-- Members can't be added to private or secret chats. +-- Member will not be added until chat state will be synchronized with the server. +-- Member will not be added if application is killed before it can send request to the server +-- @chat_id Chat identifier +-- @user_id Identifier of the user to add +-- @forward_limit Number of previous messages from chat to forward to new member, ignored for channel chats +local function addChatMember(chat_id, user_id, forward_limit, dl_cb, cmd) + tdcli_function ({ + ID = "AddChatMember", + chat_id_ = chat_id, + user_id_ = user_id, + forward_limit_ = forward_limit or 50 + }, dl_cb, cmd) +end + +M.addChatMember = addChatMember + +-- Adds many new members to the chat. +-- Currently, available only for channels. +-- Can't be used to join the channel. +-- Member will not be added until chat state will be synchronized with the server. +-- Member will not be added if application is killed before it can send request to the server +-- @chat_id Chat identifier +-- @user_ids Identifiers of the users to add +local function addChatMembers(chat_id, user_ids, dl_cb, cmd) + tdcli_function ({ + ID = "AddChatMembers", + chat_id_ = chat_id, + user_ids_ = user_ids -- vector + }, dl_cb, cmd) +end + +M.addChatMembers = addChatMembers + +-- Changes status of the chat member, need appropriate privileges. +-- In channel chats, user will be added to chat members if he is yet not a member and there is less than 200 members in the channel. +-- Status will not be changed until chat state will be synchronized with the server. +-- Status will not be changed if application is killed before it can send request to the server +-- @chat_id Chat identifier +-- @user_id Identifier of the user to edit status, bots can be editors in the channel chats +-- @status New status of the member in the chat +-- status = Creator|Editor|Moderator|Member|Left|Kicked +local function changeChatMemberStatus(chat_id, user_id, status, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeChatMemberStatus", + chat_id_ = chat_id, + user_id_ = user_id, + status_ = { + ID = "ChatMemberStatus" .. status + }, + }, dl_cb, cmd) +end + +M.changeChatMemberStatus = changeChatMemberStatus + +-- Returns information about one participant of the chat +-- @chat_id Chat identifier +-- @user_id User identifier +local function getChatMember(chat_id, user_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetChatMember", + chat_id_ = chat_id, + user_id_ = user_id + }, dl_cb, cmd) +end + +M.getChatMember = getChatMember + +-- Asynchronously downloads file from cloud. +-- Updates updateFileProgress will notify about download progress. +-- Update updateFile will notify about successful download +-- @file_id Identifier of file to download +local function downloadFile(file_id, dl_cb, cmd) + tdcli_function ({ + ID = "DownloadFile", + file_id_ = file_id + }, dl_cb, cmd) +end + +M.downloadFile = downloadFile + +-- Stops file downloading. +-- If file already downloaded do nothing. +-- @file_id Identifier of file to cancel download +local function cancelDownloadFile(file_id, dl_cb, cmd) + tdcli_function ({ + ID = "CancelDownloadFile", + file_id_ = file_id + }, dl_cb, cmd) +end + +M.cancelDownloadFile = cancelDownloadFile + +-- Next part of a file was generated +-- @generation_id Identifier of the generation process +-- @ready Number of bytes already generated. Negative number means that generation has failed and should be terminated +local function setFileGenerationProgress(generation_id, ready, dl_cb, cmd) + tdcli_function ({ + ID = "SetFileGenerationProgress", + generation_id_ = generation_id, + ready_ = ready + }, dl_cb, cmd) +end + +M.setFileGenerationProgress = setFileGenerationProgress + +-- Finishes file generation +-- @generation_id Identifier of the generation process +local function finishFileGeneration(generation_id, dl_cb, cmd) + tdcli_function ({ + ID = "FinishFileGeneration", + generation_id_ = generation_id + }, dl_cb, cmd) +end + +M.finishFileGeneration = finishFileGeneration + +-- Generates new chat invite link, previously generated link is revoked. +-- Available for group and channel chats. +-- Only creator of the chat can export chat invite link +-- @chat_id Chat identifier +local function exportChatInviteLink(chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "ExportChatInviteLink", + chat_id_ = chat_id + }, dl_cb, cmd) +end + +M.exportChatInviteLink = exportChatInviteLink + +-- Checks chat invite link for validness and returns information about the corresponding chat +-- @invite_link Invite link to check. Should begin with "https://telegram.me/joinchat/" +local function checkChatInviteLink(link, dl_cb, cmd) + tdcli_function ({ + ID = "CheckChatInviteLink", + invite_link_ = link + }, dl_cb, cmd) +end + +M.checkChatInviteLink = checkChatInviteLink + +-- Imports chat invite link, adds current user to a chat if possible. +-- Member will not be added until chat state will be synchronized with the server. +-- Member will not be added if application is killed before it can send request to the server +-- @invite_link Invite link to import. Should begin with "https://telegram.me/joinchat/" +local function importChatInviteLink(invite_link, dl_cb, cmd) + tdcli_function ({ + ID = "ImportChatInviteLink", + invite_link_ = invite_link + }, dl_cb, cmd) +end + +M.importChatInviteLink = importChatInviteLink + +-- Adds user to black list +-- @user_id User identifier +local function blockUser(user_id, dl_cb, cmd) + tdcli_function ({ + ID = "BlockUser", + user_id_ = user_id + }, dl_cb, cmd) +end + +M.blockUser = blockUser + +-- Removes user from black list +-- @user_id User identifier +local function unblockUser(user_id, dl_cb, cmd) + tdcli_function ({ + ID = "UnblockUser", + user_id_ = user_id + }, dl_cb, cmd) +end + +M.unblockUser = unblockUser + +-- Returns users blocked by the current user +-- @offset Number of users to skip in result, must be non-negative +-- @limit Maximum number of users to return, can't be greater than 100 +local function getBlockedUsers(offset, limit, dl_cb, cmd) + tdcli_function ({ + ID = "GetBlockedUsers", + offset_ = offset, + limit_ = limit + }, dl_cb, cmd) +end + +M.getBlockedUsers = getBlockedUsers + +-- Adds new contacts/edits existing contacts, contacts user identifiers are ignored. +-- Returns list of corresponding users in the same order as input contacts. +-- If contact doesn't registered in Telegram, user with id == 0 will be returned +-- @contacts List of contacts to import/edit +local function importContacts(phone_number, first_name, last_name, user_id, dl_cb, cmd) + tdcli_function ({ + ID = "ImportContacts", + contacts_ = {[0] = { + phone_number_ = tostring(phone_number), + first_name_ = tostring(first_name), + last_name_ = tostring(last_name), + user_id_ = user_id + }, + }, + }, dl_cb, cmd) +end + +M.importContacts = importContacts + +-- Searches for specified query in the first name, last name and username of the known user contacts +-- @query Query to search for, can be empty to return all contacts +-- @limit Maximum number of users to be returned +local function searchContacts(query, limit, dl_cb, cmd) + tdcli_function ({ + ID = "SearchContacts", + query_ = query, + limit_ = limit + }, dl_cb, cmd) +end + +M.searchContacts = searchContacts + +-- Deletes users from contacts list +-- @user_ids Identifiers of users to be deleted +local function deleteContacts(user_ids, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteContacts", + user_ids_ = user_ids -- vector + }, dl_cb, cmd) +end + +M.deleteContacts = deleteContacts + +-- Returns profile photos of the user. +-- Result of this query can't be invalidated, so it must be used with care +-- @user_id User identifier +-- @offset Photos to skip, must be non-negative +-- @limit Maximum number of photos to be returned, can't be greater than 100 +local function getUserProfilePhotos(user_id, offset, limit, dl_cb, cmd) + tdcli_function ({ + ID = "GetUserProfilePhotos", + user_id_ = user_id, + offset_ = offset, + limit_ = limit + }, dl_cb, cmd) +end + +M.getUserProfilePhotos = getUserProfilePhotos + +-- Returns stickers corresponding to given emoji +-- @emoji String representation of emoji. If empty, returns all known stickers +local function getStickers(emoji, dl_cb, cmd) + tdcli_function ({ + ID = "GetStickers", + emoji_ = emoji + }, dl_cb, cmd) +end + +M.getStickers = getStickers + +-- Returns list of installed sticker sets without archived sticker sets +-- @is_masks Pass true to return masks, pass false to return stickers +local function getStickerSets(is_masks, dl_cb, cmd) + tdcli_function ({ + ID = "GetStickerSets", + is_masks_ = is_masks + }, dl_cb, cmd) +end + +M.getStickerSets = getStickerSets + +-- Returns list of archived sticker sets +-- @is_masks Pass true to return masks, pass false to return stickers +-- @offset_sticker_set_id Identifier of the sticker set from which return the result +-- @limit Maximum number of sticker sets to return +local function getArchivedStickerSets(is_masks, offset_sticker_set_id, limit, dl_cb, cmd) + tdcli_function ({ + ID = "GetArchivedStickerSets", + is_masks_ = is_masks, + offset_sticker_set_id_ = offset_sticker_set_id, + limit_ = limit + }, dl_cb, cmd) +end + +M.getArchivedStickerSets = getArchivedStickerSets + +-- Returns list of trending sticker sets +local function getTrendingStickerSets(dl_cb, cmd) + tdcli_function ({ + ID = "GetTrendingStickerSets" + }, dl_cb, cmd) +end + +M.getTrendingStickerSets = getTrendingStickerSets + +-- Returns list of sticker sets attached to a file, currently only photos and videos can have attached sticker sets +-- @file_id File identifier +local function getAttachedStickerSets(file_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetAttachedStickerSets", + file_id_ = file_id + }, dl_cb, cmd) +end + +M.getAttachedStickerSets = getAttachedStickerSets + +-- Returns information about sticker set by its identifier +-- @set_id Identifier of the sticker set +local function getStickerSet(set_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetStickerSet", + set_id_ = set_id + }, dl_cb, cmd) +end + +M.getStickerSet = getStickerSet + +-- Searches sticker set by its short name +-- @name Name of the sticker set +local function searchStickerSet(name, dl_cb, cmd) + tdcli_function ({ + ID = "SearchStickerSet", + name_ = name + }, dl_cb, cmd) +end + +M.searchStickerSet = searchStickerSet + +-- Installs/uninstalls or enables/archives sticker set. +-- Official sticker set can't be uninstalled, but it can be archived +-- @set_id Identifier of the sticker set +-- @is_installed New value of is_installed +-- @is_archived New value of is_archived +local function updateStickerSet(set_id, is_installed, is_archived, dl_cb, cmd) + tdcli_function ({ + ID = "UpdateStickerSet", + set_id_ = set_id, + is_installed_ = is_installed, + is_archived_ = is_archived + }, dl_cb, cmd) +end + +M.updateStickerSet = updateStickerSet + +-- Trending sticker sets are viewed by the user +-- @sticker_set_ids Identifiers of viewed trending sticker sets +local function viewTrendingStickerSets(sticker_set_ids, dl_cb, cmd) + tdcli_function ({ + ID = "ViewTrendingStickerSets", + sticker_set_ids_ = sticker_set_ids -- vector + }, dl_cb, cmd) +end + +M.viewTrendingStickerSets = viewTrendingStickerSets + +-- Changes the order of installed sticker sets +-- @is_masks Pass true to change masks order, pass false to change stickers order +-- @sticker_set_ids Identifiers of installed sticker sets in the new right order +local function reorderStickerSets(is_masks, sticker_set_ids, dl_cb, cmd) + tdcli_function ({ + ID = "ReorderStickerSets", + is_masks_ = is_masks, + sticker_set_ids_ = sticker_set_ids -- vector + }, dl_cb, cmd) +end + +M.reorderStickerSets = reorderStickerSets + +-- Returns list of recently used stickers +-- @is_attached Pass true to return stickers and masks recently attached to photo or video files, pass false to return recently sent stickers +local function getRecentStickers(is_attached, dl_cb, cmd) + tdcli_function ({ + ID = "GetRecentStickers", + is_attached_ = is_attached + }, dl_cb, cmd) +end + +M.getRecentStickers = getRecentStickers + +-- Manually adds new sticker to the list of recently used stickers. +-- New sticker is added to the beginning of the list. +-- If the sticker is already in the list, at first it is removed from the list +-- @is_attached Pass true to add the sticker to the list of stickers recently attached to photo or video files, pass false to add the sticker to the list of recently sent stickers +-- @sticker Sticker file to add +local function addRecentSticker(is_attached, sticker, dl_cb, cmd) + tdcli_function ({ + ID = "AddRecentSticker", + is_attached_ = is_attached, + sticker_ = getInputFile(sticker) + }, dl_cb, cmd) +end + +M.addRecentSticker = addRecentSticker + +-- Removes a sticker from the list of recently used stickers +-- @is_attached Pass true to remove the sticker from the list of stickers recently attached to photo or video files, pass false to remove the sticker from the list of recently sent stickers +-- @sticker Sticker file to delete +local function deleteRecentSticker(is_attached, sticker, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteRecentSticker", + is_attached_ = is_attached, + sticker_ = getInputFile(sticker) + }, dl_cb, cmd) +end + +M.deleteRecentSticker = deleteRecentSticker + +-- Clears list of recently used stickers +-- @is_attached Pass true to clear list of stickers recently attached to photo or video files, pass false to clear the list of recently sent stickers +local function clearRecentStickers(is_attached, dl_cb, cmd) + tdcli_function ({ + ID = "ClearRecentStickers", + is_attached_ = is_attached + }, dl_cb, cmd) +end + +M.clearRecentStickers = clearRecentStickers + +-- Returns emojis corresponding to a sticker +-- @sticker Sticker file identifier +local function getStickerEmojis(sticker, dl_cb, cmd) + tdcli_function ({ + ID = "GetStickerEmojis", + sticker_ = getInputFile(sticker) + }, dl_cb, cmd) +end + +M.getStickerEmojis = getStickerEmojis + +-- Returns saved animations +local function getSavedAnimations(dl_cb, cmd) + tdcli_function ({ + ID = "GetSavedAnimations", + }, dl_cb, cmd) +end + +M.getSavedAnimations = getSavedAnimations + +-- Manually adds new animation to the list of saved animations. +-- New animation is added to the beginning of the list. +-- If the animation is already in the list, at first it is removed from the list. +-- Only non-secret video animations with MIME type "video/mp4" can be added to the list +-- @animation Animation file to add. Only known to server animations (i. e. successfully sent via message) can be added to the list +local function addSavedAnimation(animation, dl_cb, cmd) + tdcli_function ({ + ID = "AddSavedAnimation", + animation_ = getInputFile(animation) + }, dl_cb, cmd) +end + +M.addSavedAnimation = addSavedAnimation + +-- Removes animation from the list of saved animations +-- @animation Animation file to delete +local function deleteSavedAnimation(animation, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteSavedAnimation", + animation_ = getInputFile(animation) + }, dl_cb, cmd) +end + +M.deleteSavedAnimation = deleteSavedAnimation + +-- Returns up to 20 recently used inline bots in the order of the last usage +local function getRecentInlineBots(dl_cb, cmd) + tdcli_function ({ + ID = "GetRecentInlineBots", + }, dl_cb, cmd) +end + +M.getRecentInlineBots = getRecentInlineBots + +-- Get web page preview by text of the message. +-- Do not call this function to often +-- @message_text Message text +local function getWebPagePreview(message_text, dl_cb, cmd) + tdcli_function ({ + ID = "GetWebPagePreview", + message_text_ = message_text + }, dl_cb, cmd) +end + +M.getWebPagePreview = getWebPagePreview + +-- Returns notification settings for a given scope +-- @scope Scope to return information about notification settings +-- scope = Chat(chat_id)|PrivateChats|GroupChats|AllChats| +local function getNotificationSettings(scope, chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetNotificationSettings", + scope_ = { + ID = 'NotificationSettingsFor' .. scope, + chat_id_ = chat_id or nil + }, + }, dl_cb, cmd) +end + +M.getNotificationSettings = getNotificationSettings + +-- Changes notification settings for a given scope +-- @scope Scope to change notification settings +-- @notification_settings New notification settings for given scope +-- scope = Chat(chat_id)|PrivateChats|GroupChats|AllChats| +local function setNotificationSettings(scope, chat_id, mute_for, show_preview, dl_cb, cmd) + tdcli_function ({ + ID = "SetNotificationSettings", + scope_ = { + ID = 'NotificationSettingsFor' .. scope, + chat_id_ = chat_id or nil + }, + notification_settings_ = { + ID = "NotificationSettings", + mute_for_ = mute_for, + sound_ = "default", + show_preview_ = show_preview + } + }, dl_cb, cmd) +end + +M.setNotificationSettings = setNotificationSettings + +-- Resets all notification settings to the default value. +-- By default the only muted chats are supergroups, sound is set to 'default' and message previews are showed +local function resetAllNotificationSettings(dl_cb, cmd) + tdcli_function ({ + ID = "ResetAllNotificationSettings" + }, dl_cb, cmd) +end + +M.resetAllNotificationSettings = resetAllNotificationSettings + +-- Uploads new profile photo for logged in user. +-- Photo will not change until change will be synchronized with the server. +-- Photo will not be changed if application is killed before it can send request to the server. +-- If something changes, updateUser will be sent +-- @photo_path Path to new profile photo +local function setProfilePhoto(photo_path, dl_cb, cmd) + tdcli_function ({ + ID = "SetProfilePhoto", + photo_path_ = photo_path + }, dl_cb, cmd) +end + +M.setProfilePhoto = setProfilePhoto + +-- Deletes profile photo. +-- If something changes, updateUser will be sent +-- @profile_photo_id Identifier of profile photo to delete +local function deleteProfilePhoto(profile_photo_id, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteProfilePhoto", + profile_photo_id_ = profile_photo_id + }, dl_cb, cmd) +end + +M.deleteProfilePhoto = deleteProfilePhoto + +-- Changes first and last names of logged in user. +-- If something changes, updateUser will be sent +-- @first_name New value of user first name, 1-255 characters +-- @last_name New value of optional user last name, 0-255 characters +local function changeName(first_name, last_name, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeName", + first_name_ = first_name, + last_name_ = last_name + }, dl_cb, cmd) +end + +M.changeName = changeName + +-- Changes about information of logged in user +-- @about New value of userFull.about, 0-255 characters +local function changeAbout(about, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeAbout", + about_ = about + }, dl_cb, cmd) +end + +M.changeAbout = changeAbout + +-- Changes username of logged in user. +-- If something changes, updateUser will be sent +-- @username New value of username. Use empty string to remove username +local function changeUsername(username, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeUsername", + username_ = username + }, dl_cb, cmd) +end + +M.changeUsername = changeUsername + +-- Changes user's phone number and sends authentication code to the new user's phone number. +-- Returns authStateWaitCode with information about sent code on success +-- @phone_number New user's phone number in any reasonable format +-- @allow_flash_call Pass True, if code can be sent via flash call to the specified phone number +-- @is_current_phone_number Pass true, if the phone number is used on the current device. Ignored if allow_flash_call is False +local function changePhoneNumber(phone_number, allow_flash_call, is_current_phone_number, dl_cb, cmd) + tdcli_function ({ + ID = "ChangePhoneNumber", + phone_number_ = phone_number, + allow_flash_call_ = allow_flash_call, + is_current_phone_number_ = is_current_phone_number + }, dl_cb, cmd) +end + +M.changePhoneNumber = changePhoneNumber + +-- Resends authentication code sent to change user's phone number. +-- Works only if in previously received authStateWaitCode next_code_type was not null. +-- Returns authStateWaitCode on success +local function resendChangePhoneNumberCode(dl_cb, cmd) + tdcli_function ({ + ID = "ResendChangePhoneNumberCode", + }, dl_cb, cmd) +end + +M.resendChangePhoneNumberCode = resendChangePhoneNumberCode + +-- Checks authentication code sent to change user's phone number. +-- Returns authStateOk on success +-- @code Verification code from SMS, voice call or flash call +local function checkChangePhoneNumberCode(code, dl_cb, cmd) + tdcli_function ({ + ID = "CheckChangePhoneNumberCode", + code_ = code + }, dl_cb, cmd) +end + +M.checkChangePhoneNumberCode = checkChangePhoneNumberCode + +-- Returns all active sessions of logged in user +local function getActiveSessions(dl_cb, cmd) + tdcli_function ({ + ID = "GetActiveSessions", + }, dl_cb, cmd) +end + +M.getActiveSessions = getActiveSessions + +-- Terminates another session of logged in user +-- @session_id Session identifier +local function terminateSession(session_id, dl_cb, cmd) + tdcli_function ({ + ID = "TerminateSession", + session_id_ = session_id + }, dl_cb, cmd) +end + +M.terminateSession = terminateSession + +-- Terminates all other sessions of logged in user +local function terminateAllOtherSessions(dl_cb, cmd) + tdcli_function ({ + ID = "TerminateAllOtherSessions", + }, dl_cb, cmd) +end + +M.terminateAllOtherSessions = terminateAllOtherSessions + +-- Gives or revokes all members of the group editor rights. +-- Needs creator privileges in the group +-- @group_id Identifier of the group +-- @anyone_can_edit New value of anyone_can_edit +local function toggleGroupEditors(group_id, anyone_can_edit, dl_cb, cmd) + tdcli_function ({ + ID = "ToggleGroupEditors", + group_id_ = getChatId(group_id).ID, + anyone_can_edit_ = anyone_can_edit + }, dl_cb, cmd) +end + +M.toggleGroupEditors = toggleGroupEditors + +-- Changes username of the channel. +-- Needs creator privileges in the channel +-- @channel_id Identifier of the channel +-- @username New value of username. Use empty string to remove username +local function changeChannelUsername(channel_id, username, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeChannelUsername", + channel_id_ = getChatId(channel_id).ID, + username_ = username + }, dl_cb, cmd) +end + +M.changeChannelUsername = changeChannelUsername + +-- Gives or revokes right to invite new members to all current members of the channel. +-- Needs creator privileges in the channel. +-- Available only for supergroups +-- @channel_id Identifier of the channel +-- @anyone_can_invite New value of anyone_can_invite +local function toggleChannelInvites(channel_id, anyone_can_invite, dl_cb, cmd) + tdcli_function ({ + ID = "ToggleChannelInvites", + channel_id_ = getChatId(channel_id).ID, + anyone_can_invite_ = anyone_can_invite + }, dl_cb, cmd) +end + +M.toggleChannelInvites = toggleChannelInvites + +-- Enables or disables sender signature on sent messages in the channel. +-- Needs creator privileges in the channel. +-- Not available for supergroups +-- @channel_id Identifier of the channel +-- @sign_messages New value of sign_messages +local function toggleChannelSignMessages(channel_id, sign_messages, dl_cb, cmd) + tdcli_function ({ + ID = "ToggleChannelSignMessages", + channel_id_ = getChatId(channel_id).ID, + sign_messages_ = sign_messages + }, dl_cb, cmd) +end + +M.toggleChannelSignMessages = toggleChannelSignMessages + +-- Changes information about the channel. +-- Needs creator privileges in the broadcast channel or editor privileges in the supergroup channel +-- @channel_id Identifier of the channel +-- @about New value of about, 0-255 characters +local function changeChannelAbout(channel_id, about, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeChannelAbout", + channel_id_ = getChatId(channel_id).ID, + about_ = about + }, dl_cb, cmd) +end + +M.changeChannelAbout = changeChannelAbout + +-- Pins a message in a supergroup channel chat. +-- Needs editor privileges in the channel +-- @channel_id Identifier of the channel +-- @message_id Identifier of the new pinned message +-- @disable_notification True, if there should be no notification about the pinned message +local function pinChannelMessage(channel_id, message_id, disable_notification, dl_cb, cmd) + tdcli_function ({ + ID = "PinChannelMessage", + channel_id_ = getChatId(channel_id).ID, + message_id_ = message_id, + disable_notification_ = disable_notification + }, dl_cb, cmd) +end + +M.pinChannelMessage = pinChannelMessage + +-- Removes pinned message in the supergroup channel. +-- Needs editor privileges in the channel +-- @channel_id Identifier of the channel +local function unpinChannelMessage(channel_id, dl_cb, cmd) + tdcli_function ({ + ID = "UnpinChannelMessage", + channel_id_ = getChatId(channel_id).ID + }, dl_cb, cmd) +end + +M.unpinChannelMessage = unpinChannelMessage + +-- Reports some supergroup channel messages from a user as spam messages +-- @channel_id Channel identifier +-- @user_id User identifier +-- @message_ids Identifiers of messages sent in the supergroup by the user, the list should be non-empty +local function reportChannelSpam(channel_id, user_id, message_ids, dl_cb, cmd) + tdcli_function ({ + ID = "ReportChannelSpam", + channel_id_ = getChatId(channel_id).ID, + user_id_ = user_id, + message_ids_ = message_ids -- vector + }, dl_cb, cmd) +end + +M.reportChannelSpam = reportChannelSpam + +-- Returns information about channel members or kicked from channel users. +-- Can be used only if channel_full->can_get_members == true +-- @channel_id Identifier of the channel +-- @filter Kind of channel users to return, defaults to channelMembersRecent +-- @offset Number of channel users to skip +-- @limit Maximum number of users be returned, can't be greater than 200 +-- filter = Recent|Administrators|Kicked|Bots +local function getChannelMembers(channel_id, offset, filter, limit, dl_cb, cmd) + if not limit or limit > 200 then + limit = 200 + end + + tdcli_function ({ + ID = "GetChannelMembers", + channel_id_ = getChatId(channel_id).ID, + filter_ = { + ID = "ChannelMembers" .. filter + }, + offset_ = offset, + limit_ = limit + }, dl_cb, cmd) +end + +M.getChannelMembers = getChannelMembers + +-- Deletes channel along with all messages in corresponding chat. +-- Releases channel username and removes all members. +-- Needs creator privileges in the channel. +-- Channels with more than 1000 members can't be deleted +-- @channel_id Identifier of the channel +local function deleteChannel(channel_id, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteChannel", + channel_id_ = getChatId(channel_id).ID + }, dl_cb, cmd) +end + +M.deleteChannel = deleteChannel + +-- Returns list of created public channels +local function getCreatedPublicChannels(dl_cb, cmd) + tdcli_function ({ + ID = "GetCreatedPublicChannels" + }, dl_cb, cmd) +end + +M.getCreatedPublicChannels = getCreatedPublicChannels + +-- Closes secret chat +-- @secret_chat_id Secret chat identifier +local function closeSecretChat(secret_chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "CloseSecretChat", + secret_chat_id_ = secret_chat_id + }, dl_cb, cmd) +end + +M.closeSecretChat = closeSecretChat + +-- Returns user that can be contacted to get support +local function getSupportUser(dl_cb, cmd) + tdcli_function ({ + ID = "GetSupportUser", + }, dl_cb, cmd) +end + +M.getSupportUser = getSupportUser + +-- Returns background wallpapers +local function getWallpapers(dl_cb, cmd) + tdcli_function ({ + ID = "GetWallpapers", + }, dl_cb, cmd) +end + +M.getWallpapers = getWallpapers + +-- Registers current used device for receiving push notifications +-- @device_token Device token +-- device_token = apns|gcm|mpns|simplePush|ubuntuPhone|blackberry +local function registerDevice(device_token, token, device_token_set, dl_cb, cmd) + local dToken = {ID = device_token .. 'DeviceToken', token_ = token} + + if device_token_set then + dToken = {ID = "DeviceTokenSet", token_ = device_token_set} -- tokens:vector<DeviceToken> + end + + tdcli_function ({ + ID = "RegisterDevice", + device_token_ = dToken + }, dl_cb, cmd) +end + +M.registerDevice = registerDevice + +-- Returns list of used device tokens +local function getDeviceTokens(dl_cb, cmd) + tdcli_function ({ + ID = "GetDeviceTokens", + }, dl_cb, cmd) +end + +M.getDeviceTokens = getDeviceTokens + +-- Changes privacy settings +-- @key Privacy key +-- @rules New privacy rules +-- @privacyKeyUserStatus Privacy key for managing visibility of the user status +-- @privacyKeyChatInvite Privacy key for managing ability of invitation of the user to chats +-- @privacyRuleAllowAll Rule to allow all users +-- @privacyRuleAllowContacts Rule to allow all user contacts +-- @privacyRuleAllowUsers Rule to allow specified users +-- @user_ids User identifiers +-- @privacyRuleDisallowAll Rule to disallow all users +-- @privacyRuleDisallowContacts Rule to disallow all user contacts +-- @privacyRuleDisallowUsers Rule to disallow all specified users +-- key = UserStatus|ChatInvite +-- rules = AllowAll|AllowContacts|AllowUsers(user_ids)|DisallowAll|DisallowContacts|DisallowUsers(user_ids) +local function setPrivacy(key, rule, allowed_user_ids, disallowed_user_ids, dl_cb, cmd) + local rules = {[0] = {ID = 'PrivacyRule' .. rule}} + + if allowed_user_ids then + rules = { + { + ID = 'PrivacyRule' .. rule + }, + [0] = { + ID = "PrivacyRuleAllowUsers", + user_ids_ = allowed_user_ids -- vector + }, + } + end + if disallowed_user_ids then + rules = { + { + ID = 'PrivacyRule' .. rule + }, + [0] = { + ID = "PrivacyRuleDisallowUsers", + user_ids_ = disallowed_user_ids -- vector + }, + } + end + if allowed_user_ids and disallowed_user_ids then + rules = { + { + ID = 'PrivacyRule' .. rule + }, + { + ID = "PrivacyRuleAllowUsers", + user_ids_ = allowed_user_ids + }, + [0] = { + ID = "PrivacyRuleDisallowUsers", + user_ids_ = disallowed_user_ids + }, + } + end + tdcli_function ({ + ID = "SetPrivacy", + key_ = { + ID = 'PrivacyKey' .. key + }, + rules_ = { + ID = "PrivacyRules", + rules_ = rules + }, + }, dl_cb, cmd) +end + +M.setPrivacy = setPrivacy + +-- Returns current privacy settings +-- @key Privacy key +-- key = UserStatus|ChatInvite +local function getPrivacy(key, dl_cb, cmd) + tdcli_function ({ + ID = "GetPrivacy", + key_ = { + ID = "PrivacyKey" .. key + }, + }, dl_cb, cmd) +end + +M.getPrivacy = getPrivacy + +-- Returns value of an option by its name. +-- See list of available options on https://core.telegram.org/tdlib/options +-- @name Name of the option +local function getOption(name, dl_cb, cmd) + tdcli_function ({ + ID = "GetOption", + name_ = name + }, dl_cb, cmd) +end + +M.getOption = getOption + +-- Sets value of an option. +-- See list of available options on https://core.telegram.org/tdlib/options. +-- Only writable options can be set +-- @name Name of the option +-- @value New value of the option +local function setOption(name, option, value, dl_cb, cmd) + tdcli_function ({ + ID = "SetOption", + name_ = name, + value_ = { + ID = 'Option' .. option, + value_ = value + }, + }, dl_cb, cmd) +end + +M.setOption = setOption + +-- Changes period of inactivity, after which the account of currently logged in user will be automatically deleted +-- @ttl New account TTL +local function changeAccountTtl(days, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeAccountTtl", + ttl_ = { + ID = "AccountTtl", + days_ = days + }, + }, dl_cb, cmd) +end + +M.changeAccountTtl = changeAccountTtl + +-- Returns period of inactivity, after which the account of currently logged in user will be automatically deleted +local function getAccountTtl(dl_cb, cmd) + tdcli_function ({ + ID = "GetAccountTtl", + }, dl_cb, cmd) +end + +M.getAccountTtl = getAccountTtl + +-- Deletes the account of currently logged in user, deleting from the server all information associated with it. +-- Account's phone number can be used to create new account, but only once in two weeks +-- @reason Optional reason of account deletion +local function deleteAccount(reason, dl_cb, cmd) + tdcli_function ({ + ID = "DeleteAccount", + reason_ = reason + }, dl_cb, cmd) +end + +M.deleteAccount = deleteAccount + +-- Returns current chat report spam state +-- @chat_id Chat identifier +local function getChatReportSpamState(chat_id, dl_cb, cmd) + tdcli_function ({ + ID = "GetChatReportSpamState", + chat_id_ = chat_id + }, dl_cb, cmd) +end + +M.getChatReportSpamState = getChatReportSpamState + +-- Reports chat as a spam chat or as not a spam chat. +-- Can be used only if ChatReportSpamState.can_report_spam is true. +-- After this request ChatReportSpamState.can_report_spam became false forever +-- @chat_id Chat identifier +-- @is_spam_chat If true, chat will be reported as a spam chat, otherwise it will be marked as not a spam chat +local function changeChatReportSpamState(chat_id, is_spam_chat, dl_cb, cmd) + tdcli_function ({ + ID = "ChangeChatReportSpamState", + chat_id_ = chat_id, + is_spam_chat_ = is_spam_chat + }, dl_cb, cmd) +end + +M.changeChatReportSpamState = changeChatReportSpamState + +-- Bots only. +-- Informs server about number of pending bot updates if they aren't processed for a long time +-- @pending_update_count Number of pending updates +-- @error_message Last error's message +local function setBotUpdatesStatus(pending_update_count, error_message, dl_cb, cmd) + tdcli_function ({ + ID = "SetBotUpdatesStatus", + pending_update_count_ = pending_update_count, + error_message_ = error_message + }, dl_cb, cmd) +end + +M.setBotUpdatesStatus = setBotUpdatesStatus + +-- Returns Ok after specified amount of the time passed +-- @seconds Number of seconds before that function returns +local function setAlarm(seconds, dl_cb, cmd) + tdcli_function ({ + ID = "SetAlarm", + seconds_ = seconds + }, dl_cb, cmd) +end + +M.setAlarm = setAlarm + +-- Text message +-- @text Text to send +-- @disable_notification Pass true, to disable notification about the message, doesn't works in secret chats +-- @from_background Pass true, if the message is sent from background +-- @reply_markup Bots only. Markup for replying to message +-- @disable_web_page_preview Pass true to disable rich preview for link in the message text +-- @clear_draft Pass true if chat draft message should be deleted +-- @entities Bold, Italic, Code, Pre, PreCode and TextUrl entities contained in the text. Non-bot users can't use TextUrl entities. Can't be used with non-null parse_mode +-- @parse_mode Text parse mode, nullable. Can't be used along with enitities +local function sendMessage(chat_id, reply_to_message_id, disable_notification, text, disable_web_page_preview, parse_mode) + local TextParseMode = getParseMode(parse_mode) + + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = 1, + reply_markup_ = nil, + input_message_content_ = { + ID = "InputMessageText", + text_ = text, + disable_web_page_preview_ = disable_web_page_preview, + clear_draft_ = 0, + entities_ = {}, + parse_mode_ = TextParseMode, + }, + }, dl_cb, nil) +end + +M.sendMessage = sendMessage + +-- Animation message +-- @animation Animation file to send +-- @thumb Animation thumb, if available +-- @width Width of the animation, may be replaced by the server +-- @height Height of the animation, may be replaced by the server +-- @caption Animation caption, 0-200 characters +local function sendAnimation(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, animation, width, height, caption, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageAnimation", + animation_ = getInputFile(animation), + --thumb_ = { + --ID = "InputThumb", + --path_ = path, + --width_ = width, + --height_ = height + --}, + width_ = width or '', + height_ = height or '', + caption_ = caption or '' + }, + }, dl_cb, cmd) +end + +M.sendAnimation = sendAnimation + +-- Audio message +-- @audio Audio file to send +-- @album_cover_thumb Thumb of the album's cover, if available +-- @duration Duration of audio in seconds, may be replaced by the server +-- @title Title of the audio, 0-64 characters, may be replaced by the server +-- @performer Performer of the audio, 0-64 characters, may be replaced by the server +-- @caption Audio caption, 0-200 characters +local function sendAudio(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, audio, duration, title, performer, caption, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageAudio", + audio_ = getInputFile(audio), + --album_cover_thumb_ = { + --ID = "InputThumb", + --path_ = path, + --width_ = width, + --height_ = height + --}, + duration_ = duration or '', + title_ = title or '', + performer_ = performer or '', + caption_ = caption or '' + }, + }, dl_cb, cmd) +end + +M.sendAudio = sendAudio + +-- Document message +-- @document Document to send +-- @thumb Document thumb, if available +-- @caption Document caption, 0-200 characters +local function sendDocument(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, document, caption, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageDocument", + document_ = getInputFile(document), + --thumb_ = { + --ID = "InputThumb", + --path_ = path, + --width_ = width, + --height_ = height + --}, + caption_ = caption + }, + }, dl_cb, cmd) +end + +M.sendDocument = sendDocument + +-- Photo message +-- @photo Photo to send +-- @caption Photo caption, 0-200 characters +local function sendPhoto(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, photo, caption, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessagePhoto", + photo_ = getInputFile(photo), + added_sticker_file_ids_ = {}, + width_ = 0, + height_ = 0, + caption_ = caption + }, + }, dl_cb, cmd) +end + +M.sendPhoto = sendPhoto + +-- Sticker message +-- @sticker Sticker to send +-- @thumb Sticker thumb, if available +local function sendSticker(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, sticker, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageSticker", + sticker_ = getInputFile(sticker), + --thumb_ = { + --ID = "InputThumb", + --path_ = path, + --width_ = width, + --height_ = height + --}, + }, + }, dl_cb, cmd) +end + +M.sendSticker = sendSticker + +-- Video message +-- @video Video to send +-- @thumb Video thumb, if available +-- @duration Duration of video in seconds +-- @width Video width +-- @height Video height +-- @caption Video caption, 0-200 characters +local function sendVideo(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, video, duration, width, height, caption, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageVideo", + video_ = getInputFile(video), + --thumb_ = { + --ID = "InputThumb", + --path_ = path, + --width_ = width, + --height_ = height + --}, + added_sticker_file_ids_ = {}, + duration_ = duration or '', + width_ = width or '', + height_ = height or '', + caption_ = caption or '' + }, + }, dl_cb, cmd) +end + +M.sendVideo = sendVideo + +-- Voice message +-- @voice Voice file to send +-- @duration Duration of voice in seconds +-- @waveform Waveform representation of the voice in 5-bit format +-- @caption Voice caption, 0-200 characters +local function sendVoice(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, voice, duration, waveform, caption, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageVoice", + voice_ = getInputFile(voice), + duration_ = duration or '', + waveform_ = waveform or '', + caption_ = caption or '' + }, + }, dl_cb, cmd) +end + +M.sendVoice = sendVoice + +-- Message with location +-- @latitude Latitude of location in degrees as defined by sender +-- @longitude Longitude of location in degrees as defined by sender +local function sendLocation(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, latitude, longitude, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageLocation", + location_ = { + ID = "Location", + latitude_ = latitude, + longitude_ = longitude + }, + }, + }, dl_cb, cmd) +end + +M.sendLocation = sendLocation + +-- Message with information about venue +-- @venue Venue to send +-- @latitude Latitude of location in degrees as defined by sender +-- @longitude Longitude of location in degrees as defined by sender +-- @title Venue name as defined by sender +-- @address Venue address as defined by sender +-- @provider Provider of venue database as defined by sender. Only "foursquare" need to be supported currently +-- @id Identifier of the venue in provider database as defined by sender +local function sendVenue(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, latitude, longitude, title, address, id, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageVenue", + venue_ = { + ID = "Venue", + location_ = { + ID = "Location", + latitude_ = latitude, + longitude_ = longitude + }, + title_ = title, + address_ = address, + provider_ = 'foursquare', + id_ = id + }, + }, + }, dl_cb, cmd) +end + +M.sendVenue = sendVenue + +-- User contact message +-- @contact Contact to send +-- @phone_number User's phone number +-- @first_name User first name, 1-255 characters +-- @last_name User last name +-- @user_id User identifier if known, 0 otherwise +local function sendContact(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, phone_number, first_name, last_name, user_id, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageContact", + contact_ = { + ID = "Contact", + phone_number_ = phone_number, + first_name_ = first_name, + last_name_ = last_name, + user_id_ = user_id + }, + }, + }, dl_cb, cmd) +end + +M.sendContact = sendContact + +-- Message with a game +-- @bot_user_id User identifier of a bot owned the game +-- @game_short_name Game short name +local function sendGame(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, bot_user_id, game_short_name, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageGame", + bot_user_id_ = bot_user_id, + game_short_name_ = game_short_name + }, + }, dl_cb, cmd) +end + +M.sendGame = sendGame + +-- Forwarded message +-- @from_chat_id Chat identifier of the message to forward +-- @message_id Identifier of the message to forward +local function sendForwarded(chat_id, reply_to_message_id, disable_notification, from_background, reply_markup, from_chat_id, message_id, dl_cb, cmd) + tdcli_function ({ + ID = "SendMessage", + chat_id_ = chat_id, + reply_to_message_id_ = reply_to_message_id, + disable_notification_ = disable_notification, + from_background_ = from_background, + reply_markup_ = reply_markup, + input_message_content_ = { + ID = "InputMessageForwarded", + from_chat_id_ = from_chat_id, + message_id_ = message_id + }, + }, dl_cb, cmd) +end + +M.sendForwarded = sendForwarded + +return M cli/tg/tgcli (Binary file not shown.) 0 comments on commit 3233fdf Comment on 3233fdf Leave a comment Comment Desktop version
brycebaril / Node Stream MeterA streams2 passthrough meter. Counts bytes passed through, and if given a max byte limit will abort the stream when it is exceeded.
antage / CdnstatsCDNStat is a daemon collecting various statistics from nginx requests: request count, sent bytes, referer, URI path.
dtolnay / Bufsizebytes::BufMut implementation to count buffer size
sindresorhus / Byte CounterCount bytes passing through a stream
noorkhokhar99 / Track Count Objects And Speed Estimation Using YOLOv8 ByteTrack SupervisionTrack & Count Objects and Speed Estimation using YOLOv8 ByteTrack & Supervision
crftbt / EveryByteCounts.orgComparative analysis of desktop environments, window managers, and display managers across different operating systems. Quantitative metrics to help make informed decisions when choosing a desktop environment.
uvhw / Bitcoin FoundationBitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com www.bitcoin.org Abstract. A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution. Digital signatures provide part of the solution, but the main benefits are lost if a trusted third party is still required to prevent double-spending. We propose a solution to the double-spending problem using a peer-to-peer network. The network timestamps transactions by hashing them into an ongoing chain of hash-based proof-of-work, forming a record that cannot be changed without redoing the proof-of-work. The longest chain not only serves as proof of the sequence of events witnessed, but proof that it came from the largest pool of CPU power. As long as a majority of CPU power is controlled by nodes that are not cooperating to attack the network, they'll generate the longest chain and outpace attackers. The network itself requires minimal structure. Messages are broadcast on a best effort basis, and nodes can leave and rejoin the network at will, accepting the longest proof-of-work chain as proof of what happened while they were gone. 1. Introduction Commerce on the Internet has come to rely almost exclusively on financial institutions serving as trusted third parties to process electronic payments. While the system works well enough for most transactions, it still suffers from the inherent weaknesses of the trust based model. Completely non-reversible transactions are not really possible, since financial institutions cannot avoid mediating disputes. The cost of mediation increases transaction costs, limiting the minimum practical transaction size and cutting off the possibility for small casual transactions, and there is a broader cost in the loss of ability to make non-reversible payments for non- reversible services. With the possibility of reversal, the need for trust spreads. Merchants must be wary of their customers, hassling them for more information than they would otherwise need. A certain percentage of fraud is accepted as unavoidable. These costs and payment uncertainties can be avoided in person by using physical currency, but no mechanism exists to make payments over a communications channel without a trusted party. What is needed is an electronic payment system based on cryptographic proof instead of trust, allowing any two willing parties to transact directly with each other without the need for a trusted third party. Transactions that are computationally impractical to reverse would protect sellers from fraud, and routine escrow mechanisms could easily be implemented to protect buyers. In this paper, we propose a solution to the double-spending problem using a peer-to-peer distributed timestamp server to generate computational proof of the chronological order of transactions. The system is secure as long as honest nodes collectively control more CPU power than any cooperating group of attacker nodes. 1 2. Transactions We define an electronic coin as a chain of digital signatures. Each owner transfers the coin to the next by digitally signing a hash of the previous transaction and the public key of the next owner and adding these to the end of the coin. A payee can verify the signatures to verify the chain of ownership. Transaction Hash Transaction Hash Transaction Hash Owner 1's Public Key Owner 2's Public Key Owner 3's Public Key Owner 0's Signature Owner 1's Signature The problem of course is the payee can't verify that one of the owners did not double-spend the coin. A common solution is to introduce a trusted central authority, or mint, that checks every transaction for double spending. After each transaction, the coin must be returned to the mint to issue a new coin, and only coins issued directly from the mint are trusted not to be double-spent. The problem with this solution is that the fate of the entire money system depends on the company running the mint, with every transaction having to go through them, just like a bank. We need a way for the payee to know that the previous owners did not sign any earlier transactions. For our purposes, the earliest transaction is the one that counts, so we don't care about later attempts to double-spend. The only way to confirm the absence of a transaction is to be aware of all transactions. In the mint based model, the mint was aware of all transactions and decided which arrived first. To accomplish this without a trusted party, transactions must be publicly announced [1], and we need a system for participants to agree on a single history of the order in which they were received. The payee needs proof that at the time of each transaction, the majority of nodes agreed it was the first received. 3. Timestamp Server The solution we propose begins with a timestamp server. A timestamp server works by taking a hash of a block of items to be timestamped and widely publishing the hash, such as in a newspaper or Usenet post [2-5]. The timestamp proves that the data must have existed at the time, obviously, in order to get into the hash. Each timestamp includes the previous timestamp in its hash, forming a chain, with each additional timestamp reinforcing the ones before it. Hash Hash Owner 2's Signature Owner 1's Private Key Owner 2's Private Key Owner 3's Private Key Block Item Item ... 2 Block Item Item ... Verify Verify Sign Sign 4. Proof-of-Work To implement a distributed timestamp server on a peer-to-peer basis, we will need to use a proof- of-work system similar to Adam Back's Hashcash [6], rather than newspaper or Usenet posts. The proof-of-work involves scanning for a value that when hashed, such as with SHA-256, the hash begins with a number of zero bits. The average work required is exponential in the number of zero bits required and can be verified by executing a single hash. For our timestamp network, we implement the proof-of-work by incrementing a nonce in the block until a value is found that gives the block's hash the required zero bits. Once the CPU effort has been expended to make it satisfy the proof-of-work, the block cannot be changed without redoing the work. As later blocks are chained after it, the work to change the block would include redoing all the blocks after it. The proof-of-work also solves the problem of determining representation in majority decision making. If the majority were based on one-IP-address-one-vote, it could be subverted by anyone able to allocate many IPs. Proof-of-work is essentially one-CPU-one-vote. The majority decision is represented by the longest chain, which has the greatest proof-of-work effort invested in it. If a majority of CPU power is controlled by honest nodes, the honest chain will grow the fastest and outpace any competing chains. To modify a past block, an attacker would have to redo the proof-of-work of the block and all blocks after it and then catch up with and surpass the work of the honest nodes. We will show later that the probability of a slower attacker catching up diminishes exponentially as subsequent blocks are added. To compensate for increasing hardware speed and varying interest in running nodes over time, the proof-of-work difficulty is determined by a moving average targeting an average number of blocks per hour. If they're generated too fast, the difficulty increases. 5. Network The steps to run the network are as follows: 1) New transactions are broadcast to all nodes. 2) Each node collects new transactions into a block. 3) Each node works on finding a difficult proof-of-work for its block. 4) When a node finds a proof-of-work, it broadcasts the block to all nodes. 5) Nodes accept the block only if all transactions in it are valid and not already spent. 6) Nodes express their acceptance of the block by working on creating the next block in the chain, using the hash of the accepted block as the previous hash. Nodes always consider the longest chain to be the correct one and will keep working on extending it. If two nodes broadcast different versions of the next block simultaneously, some nodes may receive one or the other first. In that case, they work on the first one they received, but save the other branch in case it becomes longer. The tie will be broken when the next proof- of-work is found and one branch becomes longer; the nodes that were working on the other branch will then switch to the longer one. 3 Block Nonce Tx Tx ... Block Nonce Tx Tx ... Prev Hash Prev Hash New transaction broadcasts do not necessarily need to reach all nodes. As long as they reach many nodes, they will get into a block before long. Block broadcasts are also tolerant of dropped messages. If a node does not receive a block, it will request it when it receives the next block and realizes it missed one. 6. Incentive By convention, the first transaction in a block is a special transaction that starts a new coin owned by the creator of the block. This adds an incentive for nodes to support the network, and provides a way to initially distribute coins into circulation, since there is no central authority to issue them. The steady addition of a constant of amount of new coins is analogous to gold miners expending resources to add gold to circulation. In our case, it is CPU time and electricity that is expended. The incentive can also be funded with transaction fees. If the output value of a transaction is less than its input value, the difference is a transaction fee that is added to the incentive value of the block containing the transaction. Once a predetermined number of coins have entered circulation, the incentive can transition entirely to transaction fees and be completely inflation free. The incentive may help encourage nodes to stay honest. If a greedy attacker is able to assemble more CPU power than all the honest nodes, he would have to choose between using it to defraud people by stealing back his payments, or using it to generate new coins. He ought to find it more profitable to play by the rules, such rules that favour him with more new coins than everyone else combined, than to undermine the system and the validity of his own wealth. 7. Reclaiming Disk Space Once the latest transaction in a coin is buried under enough blocks, the spent transactions before it can be discarded to save disk space. To facilitate this without breaking the block's hash, transactions are hashed in a Merkle Tree [7][2][5], with only the root included in the block's hash. Old blocks can then be compacted by stubbing off branches of the tree. The interior hashes do not need to be stored. Block Hash0 Hash1 Hash2 Hash3 Tx0 Tx1 Tx2 Tx3 Block Header (Block Hash) Prev Hash Nonce Root Hash Hash01 Hash23 Block Block Header (Block Hash) Prev Hash Nonce Root Hash Hash01 Hash23 Hash2 Hash3 Tx3 Transactions Hashed in a Merkle Tree After Pruning Tx0-2 from the Block A block header with no transactions would be about 80 bytes. If we suppose blocks are generated every 10 minutes, 80 bytes * 6 * 24 * 365 = 4.2MB per year. With computer systems typically selling with 2GB of RAM as of 2008, and Moore's Law predicting current growth of 1.2GB per year, storage should not be a problem even if the block headers must be kept in memory. 4 8. Simplified Payment Verification It is possible to verify payments without running a full network node. A user only needs to keep a copy of the block headers of the longest proof-of-work chain, which he can get by querying network nodes until he's convinced he has the longest chain, and obtain the Merkle branch linking the transaction to the block it's timestamped in. He can't check the transaction for himself, but by linking it to a place in the chain, he can see that a network node has accepted it, and blocks added after it further confirm the network has accepted it. Longest Proof-of-Work Chain Block Header Block Header Block Header Prev Hash Nonce Prev Hash Nonce Prev Hash Nonce Merkle Root Merkle Root Merkle Root Hash01 Hash23 Merkle Branch for Tx3 Hash2 Hash3 Tx3 As such, the verification is reliable as long as honest nodes control the network, but is more vulnerable if the network is overpowered by an attacker. While network nodes can verify transactions for themselves, the simplified method can be fooled by an attacker's fabricated transactions for as long as the attacker can continue to overpower the network. One strategy to protect against this would be to accept alerts from network nodes when they detect an invalid block, prompting the user's software to download the full block and alerted transactions to confirm the inconsistency. Businesses that receive frequent payments will probably still want to run their own nodes for more independent security and quicker verification. 9. Combining and Splitting Value Although it would be possible to handle coins individually, it would be unwieldy to make a separate transaction for every cent in a transfer. To allow value to be split and combined, transactions contain multiple inputs and outputs. Normally there will be either a single input from a larger previous transaction or multiple inputs combining smaller amounts, and at most two outputs: one for the payment, and one returning the change, if any, back to the sender. It should be noted that fan-out, where a transaction depends on several transactions, and those transactions depend on many more, is not a problem here. There is never the need to extract a complete standalone copy of a transaction's history. 5 Transaction In Out In ... ... 10. Privacy The traditional banking model achieves a level of privacy by limiting access to information to the parties involved and the trusted third party. The necessity to announce all transactions publicly precludes this method, but privacy can still be maintained by breaking the flow of information in another place: by keeping public keys anonymous. The public can see that someone is sending an amount to someone else, but without information linking the transaction to anyone. This is similar to the level of information released by stock exchanges, where the time and size of individual trades, the "tape", is made public, but without telling who the parties were. Traditional Privacy Model Identities Transactions New Privacy Model Identities Transactions As an additional firewall, a new key pair should be used for each transaction to keep them from being linked to a common owner. Some linking is still unavoidable with multi-input transactions, which necessarily reveal that their inputs were owned by the same owner. The risk is that if the owner of a key is revealed, linking could reveal other transactions that belonged to the same owner. 11. Calculations We consider the scenario of an attacker trying to generate an alternate chain faster than the honest chain. Even if this is accomplished, it does not throw the system open to arbitrary changes, such as creating value out of thin air or taking money that never belonged to the attacker. Nodes are not going to accept an invalid transaction as payment, and honest nodes will never accept a block containing them. An attacker can only try to change one of his own transactions to take back money he recently spent. The race between the honest chain and an attacker chain can be characterized as a Binomial Random Walk. The success event is the honest chain being extended by one block, increasing its lead by +1, and the failure event is the attacker's chain being extended by one block, reducing the gap by -1. The probability of an attacker catching up from a given deficit is analogous to a Gambler's Ruin problem. Suppose a gambler with unlimited credit starts at a deficit and plays potentially an infinite number of trials to try to reach breakeven. We can calculate the probability he ever reaches breakeven, or that an attacker ever catches up with the honest chain, as follows [8]: p = probability an honest node finds the next block q = probability the attacker finds the next block qz = probability the attacker will ever catch up from z blocks behind Trusted Third Party q ={ 1 if p≤q} z q/pz if pq 6 Counterparty Public Public Given our assumption that p > q, the probability drops exponentially as the number of blocks the attacker has to catch up with increases. With the odds against him, if he doesn't make a lucky lunge forward early on, his chances become vanishingly small as he falls further behind. We now consider how long the recipient of a new transaction needs to wait before being sufficiently certain the sender can't change the transaction. We assume the sender is an attacker who wants to make the recipient believe he paid him for a while, then switch it to pay back to himself after some time has passed. The receiver will be alerted when that happens, but the sender hopes it will be too late. The receiver generates a new key pair and gives the public key to the sender shortly before signing. This prevents the sender from preparing a chain of blocks ahead of time by working on it continuously until he is lucky enough to get far enough ahead, then executing the transaction at that moment. Once the transaction is sent, the dishonest sender starts working in secret on a parallel chain containing an alternate version of his transaction. The recipient waits until the transaction has been added to a block and z blocks have been linked after it. He doesn't know the exact amount of progress the attacker has made, but assuming the honest blocks took the average expected time per block, the attacker's potential progress will be a Poisson distribution with expected value: = z qp To get the probability the attacker could still catch up now, we multiply the Poisson density for each amount of progress he could have made by the probability he could catch up from that point: ∞ ke−{q/pz−k ifk≤z} ∑k=0 k!⋅ 1 ifkz Rearranging to avoid summing the infinite tail of the distribution... z ke− z−k 1−∑k=0 k! 1−q/p Converting to C code... #include <math.h> double AttackerSuccessProbability(double q, int z) { double p = 1.0 - q; double lambda = z * (q / p); double sum = 1.0; int i, k; for (k = 0; k <= z; k++) { double poisson = exp(-lambda); for (i = 1; i <= k; i++) poisson *= lambda / i; sum -= poisson * (1 - pow(q / p, z - k)); } return sum; } 7 Running some results, we can see the probability drop off exponentially with z. q=0.1 z=0 P=1.0000000 z=1 P=0.2045873 z=2 P=0.0509779 z=3 P=0.0131722 z=4 P=0.0034552 z=5 P=0.0009137 z=6 P=0.0002428 z=7 P=0.0000647 z=8 P=0.0000173 z=9 P=0.0000046 z=10 P=0.0000012 q=0.3 z=0 P=1.0000000 z=5 P=0.1773523 z=10 P=0.0416605 z=15 P=0.0101008 z=20 P=0.0024804 z=25 P=0.0006132 z=30 P=0.0001522 z=35 P=0.0000379 z=40 P=0.0000095 z=45 P=0.0000024 z=50 P=0.0000006 Solving for P less than 0.1%... P < 0.001 q=0.10 z=5 q=0.15 z=8 q=0.20 z=11 q=0.25 z=15 q=0.30 z=24 q=0.35 z=41 q=0.40 z=89 q=0.45 z=340 12. Conclusion We have proposed a system for electronic transactions without relying on trust. We started with the usual framework of coins made from digital signatures, which provides strong control of ownership, but is incomplete without a way to prevent double-spending. To solve this, we proposed a peer-to-peer network using proof-of-work to record a public history of transactions that quickly becomes computationally impractical for an attacker to change if honest nodes control a majority of CPU power. The network is robust in its unstructured simplicity. Nodes work all at once with little coordination. They do not need to be identified, since messages are not routed to any particular place and only need to be delivered on a best effort basis. Nodes can leave and rejoin the network at will, accepting the proof-of-work chain as proof of what happened while they were gone. They vote with their CPU power, expressing their acceptance of valid blocks by working on extending them and rejecting invalid blocks by refusing to work on them. Any needed rules and incentives can be enforced with this consensus mechanism. 8 References [1] W. Dai, "b-money," http://www.weidai.com/bmoney.txt, 1998. [2] H. Massias, X.S. Avila, and J.-J. Quisquater, "Design of a secure timestamping service with minimal trust requirements," In 20th Symposium on Information Theory in the Benelux, May 1999. [3] S. Haber, W.S. Stornetta, "How to time-stamp a digital document," In Journal of Cryptology, vol 3, no 2, pages 99-111, 1991. [4] D. Bayer, S. Haber, W.S. Stornetta, "Improving the efficiency and reliability of digital time-stamping," In Sequences II: Methods in Communication, Security and Computer Science, pages 329-334, 1993. [5] S. Haber, W.S. Stornetta, "Secure names for bit-strings," In Proceedings of the 4th ACM Conference on Computer and Communications Security, pages 28-35, April 1997. [6] A. Back, "Hashcash - a denial of service counter-measure," http://www.hashcash.org/papers/hashcash.pdf, 2002. [7] R.C. Merkle, "Protocols for public key cryptosystems," In Proc. 1980 Symposium on Security and Privacy, IEEE Computer Society, pages 122-133, April 1980. [8] W. Feller, "An introduction to probability theory and its applications," 1957. 9
joehand / Count Filescount files, directories, and bytes recursively in a folder as fast as possible.
MYK12397 / GohotpoolA PostgreSQL-inspired byte buffer pool for Go with advanced eviction strategies, pin/usage count mechanisms, and dirty buffer tracking.
