WebSocket Connections

Paxeer supports eth_subscribe over WebSocket. You can subscribe to new blocks, event logs, and pending transactions using standard library WebSocket transports.

Endpoints

Network	WebSocket endpoint
Mainnet	`wss://evm-ws.sei-apis.com`
Testnet	`wss://evm-ws-testnet.sei-apis.com`
Devnet	`wss://evm-ws-arctic-1.sei-apis.com`

Connecting

viem

import { createPublicClient, webSocket } from 'viem';
import { sei } from 'viem/chains';

const client = createPublicClient({
  chain: sei,
  transport: webSocket('wss://evm-ws.sei-apis.com'),
});

ethers

import { ethers } from 'ethers';

const provider = new ethers.WebSocketProvider('wss://evm-ws.sei-apis.com');

Watching New Blocks

viem

const unwatch = client.watchBlocks({
  onBlock: (block) => {
    console.log('New block:', block.number);
  },
});

// Stop watching
unwatch();

ethers

provider.on('block', (blockNumber) => {
  console.log('New block:', blockNumber);
});

// Stop watching
provider.off('block');

Watching Contract Events

viem

import { parseAbiItem } from 'viem';

const unwatch = client.watchEvent({
  address: '0xContractAddress',
  event: parseAbiItem('event Transfer(address indexed from, address indexed to, uint256 value)'),
  onLogs: (logs) => {
    console.log('Transfer events:', logs);
  },
});

ethers

import { ethers } from 'ethers';

const ERC20_ABI = ['event Transfer(address indexed from, address indexed to, uint256 value)'];
const contract = new ethers.Contract('0xContractAddress', ERC20_ABI, provider);

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

// Stop watching
contract.off('Transfer');

Watching ERC-20 Transfers Across All Contracts

viem

import { parseAbiItem } from 'viem';

const unwatch = client.watchEvent({
  event: parseAbiItem('event Transfer(address indexed from, address indexed to, uint256 value)'),
  onLogs: (logs) => {
    logs.forEach((log) => {
      console.log(`Transfer on ${log.address}:`, log.args);
    });
  },
});

Notes

Paxeer's instant finality means every block emitted over WebSocket is already final - no need to wait for additional confirmations before acting on an event.
Pending transaction subscriptions (newPendingTransactions) are supported at the RPC level but Paxeer does not guarantee Ethereum-style pending state visibility.