Lightweight HTTP and WebSocket JSON RPC client for Ethereum, compatible with both geth and parity, made for polling blocks from Ethercast. Great for when Web3 is too heavy.
npm install --save @ethercast/eth-jsonrpc-client
There are three main classes exported from this module. EthHTTPClient, EthWebSocketClient, and ValidatedEthClient.
To construct a client, call getClient(nodeUrl: string)
which will construct the appropriate client based on the URL (HTTP or WebSocket)
Once you have a client, use one of the supported methods on the interface or call an unsupported method using .cmd, e.g.:
import { EthClient } from '@ethercast/eth-jsonrpc-client';
import BigNumber from 'bignumber.js';
async function getBlockNumber(): BigNumber {
const client: EthClient = getClient('http://infura.node.io/my-api-key');
const blockNumber = await client.eth_blockNumber();
console.log(`blockNumber is ${blockNumber}`);
}