approveToken method

Future<DC<Exception, Stream<SmartWalletEvent>>> approveToken(EthPrivateKey credentials, String tokenAddress, String spender, String value, { Map<String, dynamic>? transactionBody, })

Implementation

Future<DC<Exception, Stream<SmartWalletEvent>>> approveToken(
  EthPrivateKey credentials,
  String tokenAddress,
  String spender,
  String value, {
  Map<String, dynamic>? transactionBody,
}) async {
  final tokenDetailsRes = await ContractsUtils.getERC20TokenDetails(
    web3client,
    EthereumAddress.fromHex(tokenAddress),
  );

  final BigInt amount = AmountFormat.toBigInt(
    value,
    tokenDetailsRes.decimals,
  );

  final String walletModule = 'TransferManager';
  final String methodName = 'approveToken';
  final String data = ContractsUtils.encodedDataForContractCall(
    walletModule,
    EthereumAddress.fromHex(smartWallet.walletModules.transferManager),
    methodName,
    [
      EthereumAddress.fromHex(smartWallet.smartWalletAddress),
      EthereumAddress.fromHex(tokenAddress),
      EthereumAddress.fromHex(spender),
      amount,
    ],
    include0x: true,
  );

  final String nonce = await _getNonce();
  final String signature = ContractsUtils.signOffChain(
    credentials,
    smartWallet.walletModules.transferManager,
    smartWallet.smartWalletAddress,
    data,
    nonce,
  );

  final Relay relayDto = Relay(
    walletModuleAddress: smartWallet.walletModules.transferManager,
    walletAddress: smartWallet.smartWalletAddress,
    data: data,
    nonce: nonce,
    methodName: methodName,
    signature: signature,
    walletModule: walletModule,
    transactionBody: transactionBody,
  );

  return _relay(relayDto);
}