<h3 align="center"> <img height="35%" width="35%" src="https://github.com/vondas-network/viewfinder/assets/7625379/db8a63b6-4df4-4898-912d-3ff6f17690d0"/> </h3> <p align="center"><em>A single API for most EVM blockchains</em></p>

What?

Viewfinder is a single API for most EVM blockchains. The project extends sebs-etherscan API to more EVM blockchains. New methods are added by scanning each blockchain for their available methods. Each blockchain requires an API key that can be found for free (with restrictions) on Etherscan and Etherscan-clones (ex. Snowtrace, BSCscan, etc.). API keys are loaded using an .env file, more information below.

Requirements

• Node.js
• API key for supported blockchains

Installation

npm i -g viewfinder

Docs

Request

curl --location --request GET 'http://localhost:3000/util/txbyhash?blockchain=ethereum&contract=0xe6236684face5ca33c531a011071236d24460fb8&hash=0x6e471b46c6ddfc5164beb5f5ff2581acac826462b33e98471cbafc94f391765e&key=YOUR_API_KEY'

Usage

function testTxByHash(obj){
    var api = require("@vondas/viewfinder").init(obj.blockchain, obj.key);
    var output = new Promise(async(resolve, reject) => {
        try {
            response = api.proxy.eth_getTransactionByHash(obj.hash);
        } catch (ex) {
            response = null;
            reject(ex);
        }
        if (response) {
            response.then(function(txs) {
                var exportOBJ = {
                    blockchain: obj.blockchain,
                    contract: obj.contract,
                    hash: obj.hash,
                    tx: txs.result
                }
                resolve(exportOBJ);
            })
        }
    });
    return output;
}

Response

{
    "blockchain": "ethereum",
    "contract": "0xe6236684face5ca33c531a011071236d24460fb8",
    "hash": "0x6e471b46c6ddfc5164beb5f5ff2581acac826462b33e98471cbafc94f391765e",
    "tx": {
        "blockHash": "0x3c0fbfbfeb94ae16a513abbc1a668e1d1baefcbab7e53808949ddb68887f3304",
        "blockNumber": "0xd79449",
        "from": "0x3fe8c83615f7f32d11c65eb8a0a04675d8c4402b",
        "gas": "0x8774",
        "gasPrice": "0x2e5b48e700",
        "hash": "0x6e471b46c6ddfc5164beb5f5ff2581acac826462b33e98471cbafc94f391765e",
        "input": "0x095ea7b300000000000000000000000068b3465833fb72a70ecdf485e0e4c7bd8665fc45ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
        "nonce": "0x24",
        "to": "0xe6236684face5ca33c531a011071236d24460fb8",
        "transactionIndex": "0x6d",
        "value": "0x0",
        "type": "0x0",
        "chainId": "0x1",
        "v": "0x25",
        "r": "0xb45ff9d9f38c028cd27b71e3ad5bc0466268bbdaf8565e7f448ec01cec7b2a73",
        "s": "0x24487a69f87408d11a80fd6da708e08241819695f5748f37d28a15527412648b"
    }
}

Supported Blockchains

Testnet

| Testnet | Blockchain | Endpoint | | ------- | ---------- | -------------------------------- | | Ropsten | Ethereum | https://api-ropsten.etherscan.io | | Kovan | Ethereum | https://api-kovan.etherscan.io | | Rinkeby | Ethereum | https://api-rinkeby.etherscan.io |

Mainnet

| Mainnet | Endpoint | Docs | | --------- | ----------------------------------- | -------------------------------------------- | | Ethereum | https://api.etherscan.io | https://docs.etherscan.io/ | | Avalanche | https://api.snowtrace.io | https://snowtrace.io/apis | | Binance | https://api.bscscan.com | https://docs.bscscan.com/ | | Heco | https://api.hecoinfo.com | https://hecoinfo.com/apis | | Cronos | https://api.cronoscan.com | https://cronoscan.com/apis | | Moonriver | https://api-moonriver.moonscan.io | https://moonriver.moonscan.io/apis | | Moonbeam | https://blockscout.moonbeam.network | https://blockscout.moonbeam.network/api-docs | | Arbitrum | https://api.arbiscan.io | https://arbiscan.io/apis | | Fantom | https://api.ftmscan.com | https://ftmscan.com/apis | | Hooscan | https://api.hooscan.com | https://hooscan.com/apis | | Optimism | https://api-optimistic.etherscan.io | https://optimistic.etherscan.io/apis |

Methods & Functions by Blockchain

| Type | Method | URL | Ethereum | Polygon | Avalanche | BSC | Heco | Cronos | Moonriver | Moonbeam | Arbitrum | Fantom | Hooscan | | ----------- | --------------------------------------- | ------------------------------------------------------------ | -------- | ------- | --------- | ---- | ---- | ------ | --------- | -------- | -------- | ------ | ------- | | Logs | getLogs | api?module=logs&action=getLogs | x | x | x | x | x | x | x | x | x | - | - | | Proxy | eth_blockNumber | api?module=proxy&action=eth_blockNumber | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_getBlockByNumber | api?module=proxy&action=eth_getBlockByNumber | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_getBlockTransactionCountByNumber | api?module=proxy&action=eth_getBlockTransactionCountByNumber | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_getTransactionByHash | api?module=proxy&action=eth_getTransactionByHash | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_getTransactionByBlockNumberAndIndex | api?module=proxy&action=eth_getTransactionByBlockNumberAndIndex | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_getTransactionCount | api?module=proxy&action=eth_getTransactionCount | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_sendRawTransaction | api?module=proxy&action=eth_sendRawTransaction | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_getTransactionReceipt | api?module=proxy&action=eth_getTransactionReceipt | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_call | api?module=proxy&action=eth_call | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_getCode | api?module=proxy&action=eth_getCode | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_getStorageAt | api?module=proxy&action=eth_getStorageAt | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_gasPrice | api?module=proxy&action=eth_gasPrice | x | x | x | x | x | x | x | x | - | - | - | | Proxy | eth_estimateGas | api?module=proxy&action=eth_estimateGas | x | x | x | x | x | x | x | x | - | - | - | | Stats | tokensupply | api?module=stats&action=tokensupply | x | x | x | x | x | x | x | x | - | x | x | | Stats | ethsupply | api?module=stats&action=ethsupply | x | x | x | x | x | x | x | x | - | x | x | | Stats | ethprice | api?module=stats&action=ethprice | x | x | x | x | x | x | x | x | - | x | x | | Block | block | api?module=block&action=gtblockreward | x | x | x | x | x | x | x | x | x | - | - | | Transaction | getstatus | api?module=transaction&action=gettxreceiptstatus | x | x | x | x | x | x | x | x | x | - | - | | Contract | getabi | api?module=contract&action=getabi | x | x | x | x | x | x | x | x | x | x | x | | Contract | getsourcecode | api?module=contract&action=getsourcecode | x | x | x | x | x | x | x | x | x | x | x | | Account | tokenbalance | api?module=account&action=tokenbalance