bridge_listener.ts

/**
 * Copyright 2025 Circle Internet Group, Inc. All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {
  AddressLike,
  BigNumberish,
  Contract,
  WebSocketProvider,
  formatEther,
  // Wallet,
  // JsonRpcProvider,
} from "ethers";

import BridgeContract from "./artifacts/hardhat/contracts/RadiusBridge.sol/RadiusBridge.json";
import { exec } from "child_process";

import * as dotenv from "dotenv";
dotenv.config();

const HOLESKY_WS_RPC_URL =
  "wss://eth-holesky.g.alchemy.com/v2/zz9S1NLrUlFEBOvEhRktRxMJzXJYW30V";
const HOLESKY_BRIDGE_ADDRESS = "0xB10F4F97771F9B139637F23B20152F661dAcE269";
const RADIUS_BRIDGE_ADDRESS = "0x0320c72946E46E2bbb2d8700982e87c6f2c3503D";
const PRIVATE_KEY = "";

const holeskyProvider = new WebSocketProvider(HOLESKY_WS_RPC_URL, {
  name: "holesky",
  chainId: 17000,
});

const holeskyBridgeContract = new Contract(
  HOLESKY_BRIDGE_ADDRESS,
  BridgeContract.abi,
  holeskyProvider
);

function runCommand(command: string): Promise<string> {
  return new Promise((resolve, reject) => {
    exec(command, (error, stdout) => {
      if (error) {
        console.error(error);
        reject(error);
      } else {
        resolve(stdout.trim());
      }
    });
  });
}
console.log("bot listening!");

void holeskyBridgeContract.on(
  "Deposit",
  async (depositor: AddressLike, amount: BigNumberish) => {
    // TODO: edit command to use ${depositor}, ${amount}
    console.log(`sending ${formatEther(amount)} tokens to ${depositor}`);
    try {
      const output = await runCommand(
        `cast send ${RADIUS_BRIDGE_ADDRESS} --rpc-url https://rpc.testnet.tryradi.us/ac030419463f6b74251f4b090c743b051b3624eaf6d9e7c0 --private-key ${PRIVATE_KEY} "release(address,uint256)" ${depositor}  ${parseInt(
          formatEther(amount)
        )}`
      );

      console.log(output);
    } catch (err) {
      console.error(err);
    }
    console.log(
      `sent ${formatEther(
        amount
      )} tokens to ${depositor} on Radius contract: ${RADIUS_BRIDGE_ADDRESS}`
    );
  }
);