transactionDataToGrpcTransaction function

Transaction transactionDataToGrpcTransaction(TransactionBlockDataBuilder data, { bool includeGas = true, bool includeBudget = true, })

Maps the transaction builder's internal ($kind-tagged map) representation to the gRPC structured Transaction message, so it can be simulated with the gas payment/budget left unset for server-side gas selection — mirroring Mysten's TS transactionDataToGrpcTransaction.

Inputs must already be resolved (no UnresolvedPure / UnresolvedObject); Transaction.build's _prepare does that before gas resolution.

Implementation

Transaction transactionDataToGrpcTransaction(
  TransactionBlockDataBuilder data, {
  bool includeGas = true,
  bool includeBudget = true,
}) {
  final inputs = (data.inputs).map(_callArgToGrpcInput).toList();
  final commands = (data.commands).map(_commandToGrpcCommand).toList();

  final tx = Transaction(
    version: 1,
    kind: TransactionKind(
      programmableTransaction: ProgrammableTransaction(
        inputs: inputs,
        commands: commands,
      ),
    ),
  );

  if (data.sender != null) {
    tx.sender = data.sender!;
  }

  if (includeGas) {
    final gas = data.gasData;
    final payment = GasPayment(
      objects: (gas.payment ?? const [])
          .map((ref) => ObjectReference(
                objectId: ref.objectId,
                version: Int64(ref.version),
                digest: ref.digest,
              ))
          .toList(),
    );
    final owner = gas.owner ?? data.sender;
    if (owner != null) payment.owner = owner;
    if (gas.price != null) payment.price = Int64.parseInt(gas.price.toString());
    // For server-side gas selection (`doGasSelection`) the budget is omitted so
    // the node estimates it from the simulation. Honoring a caller/dApp-supplied
    // budget here would make the node select coins to satisfy that budget (often
    // a conservative 50_000_000 ceiling), which fails for accounts holding less
    // than it even though the transaction's real gas is tiny.
    if (includeBudget && gas.budget != null) {
      payment.budget = Int64.parseInt(gas.budget.toString());
    }
    tx.gasPayment = payment;
  }

  return tx;
}