npm install ethers

npx tsx script.ts

import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://evm-rpc.sei-apis.com');

// Any valid Sei EVM address — swap in your own
const address = '0x0000000000000000000000000000000000000000';

const blockNumber = await provider.getBlockNumber(); // number
console.log('Block number:', blockNumber);

const balance = await provider.getBalance(address); // bigint, wei
console.log('Balance (SEI):', ethers.formatEther(balance));

const nonce = await provider.getTransactionCount(address); // number
console.log('Nonce:', nonce);

Block number: 148203117
Balance (SEI): 12.5
Nonce: 7

const provider = new ethers.BrowserProvider(window.ethereum);
const signer = await provider.getSigner();
const address = await signer.getAddress();

const wallet = new ethers.Wallet('0xYourPrivateKey', provider);

const tx = await wallet.sendTransaction({
  to: '0xRecipient',
  value: ethers.parseEther('1'),
});

const receipt = await tx.wait();
// receipt is final immediately — Sei has instant finality

const abi = ['function balanceOf(address owner) view returns (uint256)'];
const contract = new ethers.Contract('0xTokenAddress', abi, provider);

const balance = await contract.balanceOf('0xYourAddress');

const contract = new ethers.Contract('0xTokenAddress', abi, wallet);

const tx = await contract.transfer('0xRecipient', 1_000_000n);
const receipt = await tx.wait();

const gas = await provider.estimateGas({
  from: wallet.address,
  to: '0xContractAddress',
  data: '0xCalldata',
});

const wsProvider = new ethers.WebSocketProvider('wss://evm-ws.sei-apis.com');
const token = new ethers.Contract(
  '0xTokenAddress',
  ['event Transfer(address indexed from, address indexed to, uint256 value)'],
  wsProvider
);

token.on('Transfer', (from, to, value) => {
  console.log('Transfer:', { from, to, value });
});

// Stop listening
token.off('Transfer');