A single API for most EVM blockchains

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	x	x	x	x	x	x	x	x	x	x	x
Account	balance	api?module=account&action=balance	x	x	x	x	x	x	x	x	x	x	x
Account	txlistinternal	api?module=account&action=txlistinternal	x	x	x	x	x	x	x	x	x	x	x
Account	txlist	api?module=account&action=txlist	x	x	x	x	x	x	x	x	x	x	x
Account	getminedblocks	api?module=account&action=getminedblocks	x	x	x	x	x	x	x	x	x	x	x
Account	tokentx	api?module=account&action=tokentx	x	x	x	x	x	x	x	x	x	x	x
Token	tokensupply	api?module=tokens&action=tokensupply	-	x	-	-	-	-	-	-	-	-	-
Token	tokenbalance	api?module=tokens&action=tokenbalance	-	x	-	-	-	-	-	-	-	-	-

*subject to change