@cosmjs/stargate

What is @cosmjs/stargate?

@cosmjs/stargate is a JavaScript library for interacting with Cosmos SDK-based blockchains. It provides tools for connecting to nodes, querying blockchain data, and creating and signing transactions.

What are @cosmjs/stargate's main functionalities?

Connecting to a Blockchain

This feature allows you to connect to a Cosmos SDK-based blockchain using an RPC endpoint. The code sample demonstrates how to establish a connection and retrieve the chain ID.

const { StargateClient } = require('@cosmjs/stargate');

async function connect() {
  const rpcEndpoint = 'https://rpc.cosmos.network';
  const client = await StargateClient.connect(rpcEndpoint);
  console.log('Connected to chain:', await client.getChainId());
}

connect();

Querying Blockchain Data

This feature allows you to query blockchain data such as account information. The code sample demonstrates how to retrieve account data for a given address.

const { StargateClient } = require('@cosmjs/stargate');

async function queryAccount(address) {
  const rpcEndpoint = 'https://rpc.cosmos.network';
  const client = await StargateClient.connect(rpcEndpoint);
  const account = await client.getAccount(address);
  console.log('Account data:', account);
}

queryAccount('cosmos1...');

Creating and Signing Transactions

This feature allows you to create and sign transactions. The code sample demonstrates how to send tokens from one account to another, including setting up the wallet, connecting to the blockchain, and broadcasting the transaction.

const { DirectSecp256k1HdWallet } = require('@cosmjs/proto-signing');
const { assertIsBroadcastTxSuccess, SigningStargateClient } = require('@cosmjs/stargate');

async function sendTokens() {
  const mnemonic = 'your mnemonic here';
  const wallet = await DirectSecp256k1HdWallet.fromMnemonic(mnemonic);
  const [firstAccount] = await wallet.getAccounts();
  const rpcEndpoint = 'https://rpc.cosmos.network';
  const client = await SigningStargateClient.connectWithSigner(rpcEndpoint, wallet);

  const amountFinal = {
    denom: 'uatom',
    amount: '1000',
  };

  const fee = {
    amount: [{ denom: 'uatom', amount: '500' }],
    gas: '200000',
  };

  const result = await client.sendTokens(firstAccount.address, 'cosmos1...', [amountFinal], fee, 'Test transaction');
  assertIsBroadcastTxSuccess(result);
  console.log('Transaction successful:', result);
}

sendTokens();

Other packages similar to @cosmjs/stargate

@cosmjs/launchpad

@cosmjs/launchpad is another library for interacting with Cosmos SDK-based blockchains, but it is designed for the older Cosmos SDK versions (pre-Stargate). It provides similar functionalities such as connecting to nodes, querying data, and signing transactions, but it is not compatible with the latest Stargate features.

cosmjs-types

cosmjs-types is a library that provides TypeScript definitions for Cosmos SDK protobuf messages. It is useful for developers who need to work with raw protobuf messages and want type safety in their applications. While it does not provide high-level functionalities like @cosmjs/stargate, it complements it by offering low-level message handling.

cosmos-client

cosmos-client is a JavaScript library for interacting with Cosmos SDK-based blockchains. It offers similar functionalities to @cosmjs/stargate, such as connecting to nodes, querying data, and signing transactions. However, it may not be as actively maintained or feature-rich as @cosmjs/stargate.

README

@cosmjs/stargate

A client library for the Cosmos SDK 0.40.

Supported Cosmos SDK versions

CosmJS version	Supported Cosmos SDK version(s)
^0.24.0	0.40.x, 0.41.x, 0.42.x
^0.24.0-alpha.14	0.40.0
^0.24.0-alpha.8	0.40.0-rc3
0.24.0-alpha.2 – 0.24.0-alpha.7	0.40.0-rc2
0.24.0-alpha.1	0.40.0-rc1

License

This package is part of the cosmjs repository, licensed under the Apache License 2.0 (see NOTICE and LICENSE).