getErc20TransferSig method
Implementation
Uint8List getErc20TransferSig() {
  return (erc20TransferSig +
          recipient.substring(2).padLeft(64, '0') +
          amount.value.toHex.padLeft(64, '0'))
      .hexToBytes;
}Uint8List getErc20TransferSig() {
  return (erc20TransferSig +
          recipient.substring(2).padLeft(64, '0') +
          amount.value.toHex.padLeft(64, '0'))
      .hexToBytes;
}