Listen to On-Chain Events

import { ethers } from "ethers";

const wsProvider = new ethers.WebSocketProvider(
  "wss://api.test.stablenet.network/ws"
);

wsProvider.on("block", async (blockNumber) => {
  const block = await wsProvider.getBlock(blockNumber);
  console.log(`Block ${block.number} — hash: ${block.hash}`);
});

Block 1234567 — hash: 0xabc...
Block 1234568 — hash: 0xdef...

const CONTRACT_ADDRESS = "0xYourDeployedContract";
const ABI = [
  "event Payment(address indexed from, address indexed to, uint256 amount)"
];

const contract = new ethers.Contract(CONTRACT_ADDRESS, ABI, wsProvider);

contract.on("Payment", (from, to, amount, event) => {
  console.log(`Payment from ${from} to ${to}: ${ethers.formatEther(amount)} WKRC`);
  console.log(`  tx: ${event.log.transactionHash}`);
});

Payment from 0xSender to 0xRecipient: 1.0 WKRC
  tx: 0xabc...

// Listen only for payments sent by a specific address
const filter = contract.filters.Payment("0xSpecificSender");
contract.on(filter, (from, to, amount) => {
  console.log(`Filtered payment: ${ethers.formatEther(amount)} WKRC`);
});

const httpProvider = new ethers.JsonRpcProvider(
  "https://api.test.stablenet.network"
);

const logs = await httpProvider.getLogs({
  address: CONTRACT_ADDRESS,
  fromBlock: 1200000,
  toBlock: "latest",
  topics: [
    ethers.id("Payment(address,address,uint256)")  // keccak256 of event signature
  ],
});

for (const log of logs) {
  const parsed = contract.interface.parseLog(log);
  console.log(
    `Block ${log.blockNumber}: ${ethers.formatEther(parsed.args.amount)} WKRC`
  );
}

Block 1234500: 1.0 WKRC
Block 1234512: 0.5 WKRC

// Remove a specific listener
contract.off("Payment", listenerFunction);

// Remove all listeners for an event
contract.removeAllListeners("Payment");

// Close the WebSocket connection
await wsProvider.destroy();