transferPreCombine method

Future<ConstructionPayloadsResponse> transferPreCombine(Uint8List srcPub, Uint8List destAddr, BigInt count, BigInt? maxFee, Map<String, dynamic>? opt,)

Implementation

Future<rosetta.ConstructionPayloadsResponse> transferPreCombine(
    Uint8List srcPub,
    Uint8List destAddr,
    BigInt count,
    BigInt? maxFee,
    Map<String, dynamic>? opt) async {
  assert(networkIdentifier != null, "Cannot get networkIdentifier");

  var netId = networkIdentifier;

  var oper1 = rosetta.Operation.fromMap(
    {
      "operation_identifier": {"index": 0},
      "type": "TRANSACTION",
      "account": {
        "address": getAccountIdFromEd25519PublicKey(srcPub).toHex()
      },
      "amount": {
        "value": "-${count.toRadixString(10)}",
        "currency": currency?.toJson(),
      },
    },
  ).toJson();
  var oper2 = rosetta.Operation.fromMap(
    {
      "operation_identifier": {"index": 1},
      "type": "TRANSACTION",
      "account": {
        "address": crc32Add(destAddr).toHex(),
      },
      "amount": {
        "value": count.toRadixString(10),
        "currency": currency?.toJson(),
      },
    },
  ).toJson();
  var oper3 = rosetta.Operation.fromMap(
    {
      "operation_identifier": {"index": 2},
      "type": "FEE",
      "account": {
        "address": getAccountIdFromEd25519PublicKey(srcPub).toHex()
      },
      "amount": {
        "value":
            "-${maxFee?.toRadixString(10) ?? suggestedFee?.toRadixString(10)}",
        "currency": currency?.toJson(),
      },
    },
  ).toJson();
  var metaResult = await metadata(rosetta.ConstructionMetadataRequest.fromMap(
      {"network_identifier": netId?.toJson()}));
  var meta = {...metaResult.metadata, ...?opt};

  var _payloads = rosetta.ConstructionPayloadsRequest.fromMap({
    "network_identifier": netId?.toJson(),
    "operations": [oper1, oper2, oper3],
    "metadata": meta,
    "public_keys": [
      {
        "hex_bytes": srcPub.toHex(),
        "curve_type": "edwards25519",
      },
    ],
  });

  // print(jsonEncode(_payloads.toJson()));

  return await payloads(_payloads);
}