Wrap Native Tokens

import { ethers } from "ethers";

const WETH_ABI = ["function deposit() external payable"];

async function wrapNative(
  wrappedTokenAddress: string,
  amount: bigint,
  signer: ethers.Signer,
): Promise<ethers.TransactionReceipt> {
  const wrappedToken = new ethers.Contract(
    wrappedTokenAddress,
    WETH_ABI,
    signer,
  );

  const transaction = await wrappedToken.deposit({ value: amount });
  const receipt = await transaction.wait();

  if (!receipt) {
    throw new Error("The wrapping transaction did not produce a receipt");
  }

  return receipt;
}