import { bufferToHex, ecrecover, pubToAddress } from 'ethereumjs-util'

export const isTxHashSignedWithPrefix = (txHash: string, signature: string, ownerAddress: string): boolean => {
  let hasPrefix
  try {
    const rsvSig = {
      r: Buffer.from(signature.slice(2, 66), 'hex'),
      s: Buffer.from(signature.slice(66, 130), 'hex'),
      v: parseInt(signature.slice(130, 132), 16),
    }
    const recoveredData = ecrecover(Buffer.from(txHash.slice(2), 'hex'), rsvSig.v, rsvSig.r, rsvSig.s)
    const recoveredAddress = bufferToHex(pubToAddress(recoveredData))
    hasPrefix = !sameString(recoveredAddress, ownerAddress)
  } catch (e) {
    console.error(e)
    hasPrefix = true
  }
  return hasPrefix
}