@cosmjs/tendermint-rpc

Querying Blockchain Data

This feature allows you to query various pieces of information from the blockchain, such as the current status, block information, and more. The code sample demonstrates how to connect to a Tendermint node and fetch its status.

const { Tendermint34Client } = require('@cosmjs/tendermint-rpc');

async function queryBlockchain() {
  const client = await Tendermint34Client.connect('http://localhost:26657');
  const status = await client.status();
  console.log(status);
}

queryBlockchain();

Subscribing to Events

This feature allows you to subscribe to various events happening on the blockchain, such as new blocks being created. The code sample demonstrates how to subscribe to new block events and handle them.

const { Tendermint34Client, SubscriptionEventType } = require('@cosmjs/tendermint-rpc');

async function subscribeToEvents() {
  const client = await Tendermint34Client.connect('http://localhost:26657');
  const subscription = client.subscribe({
    query: 'tm.event = "NewBlock"'
  });

  subscription.addListener(SubscriptionEventType.NewBlock, (event) => {
    console.log('New block event:', event);
  });
}

subscribeToEvents();

Broadcasting Transactions

This feature allows you to broadcast transactions to the blockchain. The code sample demonstrates how to connect to a Tendermint node and broadcast a sample transaction.

const { Tendermint34Client } = require('@cosmjs/tendermint-rpc');

async function broadcastTransaction(tx) {
  const client = await Tendermint34Client.connect('http://localhost:26657');
  const result = await client.broadcastTxCommit({ tx });
  console.log(result);
}

const sampleTx = new Uint8Array([0x00, 0x01, 0x02]);
broadcastTransaction(sampleTx);