Ethers V5 PopulatedTransaction to Wagmi Transaction Args

[jmrossy]

Hey, just sharing a snippet that has been useful to my team and I. This takes an Ethers V5 PopulatedTransaction, like one would get from a typechain-generated contract call, and converts it to a wagmi-compatible transcation request object.

import { SendTransactionArgs } from '@wagmi/core';
import { PopulatedTransaction, BigNumber } from 'ethers';

export function ethers5TxToWagmiTx(tx: PopulatedTransaction): SendTransactionArgs {
  if (!tx.to) throw new Error('No tx recipient address specified');
  if (!tx.data) throw new Error('No tx data specified');
  return {
    to: tx.to,
    value: ethersBnToBigInt(tx.value || BigNumber.from('0')),
    data: tx.data as `0x{string}`,
    nonce: tx.nonce,
    chainId: tx.chainId,
    gas: tx.gasLimit ? ethersBnToBigInt(tx.gasLimit) : undefined,
    gasPrice: tx.gasPrice ? ethersBnToBigInt(tx.gasPrice) : undefined,
    maxFeePerGas: tx.maxFeePerGas ? ethersBnToBigInt(tx.maxFeePerGas) : undefined,
    maxPriorityFeePerGas: tx.maxPriorityFeePerGas
      ? ethersBnToBigInt(tx.maxPriorityFeePerGas)
      : undefined,
  };
}

function ethersBnToBigInt(bn: BigNumber): bigint {
  return BigInt(bn.toString());
}