我正在使用 Hyperledger Fabric Java SDK 通過 txId 獲取交易。返回對象包括交易信息。TransactionInfo txInfo = channel.queryTransactionByID(txId);Common.Envelope envelope = txInfo.getEnvelope();Common.Payload payload = Common.Payload.parseFrom(envelope.getPayload());該Payload消息包括標題和數據。我可以使用Common.Header.ChannelHeader和來解析標頭Common.Header.SignatureHeader。Common.ChannelHeader channelHeader = Common.ChannelHeader.parseFrom(payload.getHeader().getChannelHeader());Common.SignatureHeader signatureHeader = Common.SignatureHeader.parseFrom(payload.getHeader().getSignatureHeader());問題是，我看不到任何消息類型來從中獲取數據Payload。我的期望是，SomeMessage someMsg = SomeMessage.parseFrom(payload.getData());獲取數據對象的理想方法是什么？
3 回答
MM們
TA貢獻1886條經驗 獲得超2個贊
終于找到了一種將 QSCC 響應解析為 TxReadWriteSet 甚至 KVRWSet 的方法??！這是一個例子：
TransactionInfo txInfo = channel.queryTransactionByID(txId);
Common.Envelope envelope = txInfo.getEnvelope();
Common.Payload payload = Common.Payload.parseFrom(envelope.getPayload());
FabricTransaction.Transaction transaction = FabricTransaction.Transaction.parseFrom(payload.getData());
FabricTransaction.TransactionAction action = transaction.getActionsList().get(0); // 0 is a index
FabricTransaction.ChaincodeActionPayload chaincodeActionPayload = FabricTransaction.ChaincodeActionPayload.parseFrom(action.getPayload());
FabricProposalResponse.ProposalResponsePayload prp = FabricProposalResponse.ProposalResponsePayload.parseFrom(chaincodeActionPayload.getAction().getProposalResponsePayload());
FabricProposal.ChaincodeAction ca = FabricProposal.ChaincodeAction.parseFrom(prp.getExtension());
Rwset.TxReadWriteSet txrws = Rwset.TxReadWriteSet.parseFrom(ca.getResults());
TxReadWriteSetInfo txrwsInfo = new TxReadWriteSetInfo(txrws);
KvRwset.KVRWSet kvrwSet = txrwsInfo.getNsRwsetInfo(0).getRwset();
KvRwset.KVWrite kvWrite = kvrwSet.getWrites(0);
String writeVal = kvWrite.getValue().toStringUtf8();
慕桂英3389331
TA貢獻2036條經驗 獲得超8個贊
從事務中獲取請求數據時，我們遇到了類似的問題。
以下代碼將有助于獲取交易的交易請求數據
面料 SDK 版本：2.1.4
// get transaction from transaction ID
TransactionInfo txInfo = channel.queryTransactionByID(txId);
// transaction is stored inside the envelope containing the payload and signature
Common.Envelope envelope = txInfo.getEnvelope();
// parse payload from the envelope
Common.Payload payload = Common.Payload.parseFrom(envelope.getPayload());
// payload contains Header and Data. We are parsing data to get the transaction
TransactionPackage.Transaction transaction = TransactionPackage.Transaction.parseFrom(payload.getData());
// get first action from the transaction action list. it contains input and other details
TransactionPackage.TransactionAction action = transaction.getActionsList().get(0); // 0 is a index
// chaincode action payload contains input parameters. So we are taking the action payload
TransactionPackage.ChaincodeActionPayload chaincodeActionPayload = TransactionPackage.ChaincodeActionPayload.parseFrom(action.getPayload());
// chaincode ProposalPayload contains Input and TransientMap. We are parsing actionPayload to proposalPayload
ProposalPackage.ChaincodeProposalPayload prp = ProposalPackage.ChaincodeProposalPayload.parseFrom(chaincodeActionPayload.getChaincodeProposalPayload());
// parse the input to chaincodeInvocationSpec so that we can unmarshal the input
Chaincode.ChaincodeInvocationSpec chaincodeInvocationSpec = Chaincode.ChaincodeInvocationSpec.parseFrom(prp.getInput());
// get the input and parse the arg list and get input arguments
chaincodeInvocationSpec.getChaincodeSpec().getInput().getArgsList().get(ChaincodeInput.ARGS_FIELD_NUMBER).toStringUtf8();
侃侃爾雅
TA貢獻1801條經驗 獲得超16個贊
我找到了答案。
FabricTransaction.Transaction transaction = FabricTransaction.Transaction.parseFrom(payload.getData());
在那之后，
FabricTransaction.TransactionAction action = transaction.getActionsList().get(index);
FabricTransaction.ChaincodeActionPayload chaincodeActionPayload = FabricTransaction.ChaincodeActionPayload.parseFrom(action.getPayload());
chaincodeActionPayload.getAction().getEndorsementsList().forEach(endorsement -> {
// This is my current point
???? endorser = ????.parseFrom(endorsement.getEndorser());
});
如果我能找到更多，讓我補充一下。歡迎大家補充評論。
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