parseTransfer static method

NftTransfer? parseTransfer(Transaction tx)

Returns a NftTransfer? from the parsed transaction tx

Implementation

static NftTransfer? parseTransfer(Transaction tx) {
  try {
    final body = tx.inMessage?.body.beginParse();
    if (body == null) {
      return null;
    }

    final op = body.loadUint(32);
    if (op != 0x5fcc3d14) {
      return null;
    }

    // Eligibility check
    if ((tx.inMessage?.info is CmiInternal) == false) {
      return null;
    }
    if ((tx.description is TdGeneric) == false) {
      return null;
    }
    if (((tx.description as TdGeneric).computePhase is TcpVm) == false) {
      return null;
    }
    if (((tx.description as TdGeneric).computePhase as TcpVm).exitCode != 0) {
      return null;
    }

    // NftTransfer instance
    var queryId = body.loadUint(64);
    var from = (tx.inMessage!.info as CmiInternal).src;
    var to = body.loadInternalAddress();
    var responseTo = body.loadInternalAddressOrNull();
    var customPayload = body.loadRef();
    var forwardAmount = body.loadCoins();
    var forwardPayload = body.loadRef();

    return NftTransfer(
      queryId: queryId,
      from: from,
      to: to,
      responseTo: responseTo,
      customPayload: customPayload,
      forwardAmount: forwardAmount,
      forwardPayload: forwardPayload,
    );
  } catch (e) {
    return null;
  }
}