callContract method

Future<String> callContract({ required String contractAddress, required String contractAbi, required String functionName, required List args, required String currentAddress, bool? useDefaultPaymaster, BigInt? gasPrice, BigInt? gasLimit, })

Calls a function of a smart contract and returns the user operation hash.

This function allows you to call a function on any smart contract using an userOp .

Parameters:

• contractAddress: The address of the smart contract to interact with.
• contractAbi: The JSON ABI (Application Binary Interface) of the smart contract, which defines the methods and data structures of the contract.
• functionName: The name of the function within the smart contract that you want to call.
• args: A list of dynamic arguments required for the function call, which should match the function's parameter types as specified in the contract's ABI.
• currentAddress: The current Ethereum address of the user making the function call.
• useDefaultPaymaster: An optional boolean indicating whether to use the default paymaster for gas payment. If not provided, it defaults to the value of this.usePaymaster.
• gasPrice: An optional BigInt representing the price (in Wei) that you are willing to pay per unit of gas.
• gasLimit: An optional BigInt representing the maximum amount of gas that can be consumed by the transaction.

Returns:

• A Future

Implementation

Future<String> callContract({
  required String contractAddress,
  required String contractAbi,
  required String functionName,
  required List<dynamic> args,
  required String currentAddress,
  bool? useDefaultPaymaster,
  BigInt? gasPrice,
  BigInt? gasLimit,
}) async {
  // Get the user operation for the contract function call.
  final RPCResult res = await _getContractCallingUserOp(
    contractAddress: contractAddress,
    contractAbi: contractAbi,
    functionName: functionName,
    args: args,
    useDefaultPaymaster: useDefaultPaymaster ?? this.usePaymaster,
    currentAddress: currentAddress,
  );

  // Fetch the personal signature for the user operation.
  final String signature =
      await fetchSignature(res.userOpHash!, this.signer, true);
  print("Now sending signed op");
  // Send the signed user operation to the Ethereum network.
  final String userOpHash = await RPCCall().sendSignedOp(
    signature,
    res.userOp!,
    useDefaultPaymaster ?? this.usePaymaster,
    this.bundlerURL,
    this.entryPointAddress,
    this.paymasterConfig,
  );

  // Return the user operation hash.
  return userOpHash;
}