hyperledger-fabric

问题 Is it possible to dynamically set access to private data in Hyperledger fabric 1.4? Unlike the collections file where we have to add the organizations that can have access to a particular "collection", is it possible to add access through chaincode? 回答1: Had to do some research on this myself, but since Fabric v1.4 it is possible to dynamically add peers to private data collections. Private data reconciliation ensures that all private data state in that collection, which was created prior to

问题 Error starting container: Failed to generate platform-specific docker build: Error returned from build: 1 "can't load package: package ../../bin/github.com/hyperledger/fabric/chaincode/marbles: open /bin/github.com/hyperledger/fabric/chaincode/marbles: no such file or directory. I see it is looking for a relative directory. relative to what? chaincode install was fine. If the chaincode is installed, why can it not be found for instantiate? 1 peer. 1 solo orderer. channel joined fine. 回答1:

问题 Which language among Node.js and Go is better suited for 'chaincode' development when it comes to maintainibility, scalability and better support? 回答1: It's a matter of personal preference, but I'd say Golang, because: Node.js chaincode uses npm install at the time of container building, which is slow and might fail due to network problems, while Golang just compiles the source code without fetching anything. Chaincode features are introduced to Golang chaincode first and then later on to

问题 Which language among Node.js and Go is better suited for 'chaincode' development when it comes to maintainibility, scalability and better support? 回答1: It's a matter of personal preference, but I'd say Golang, because: Node.js chaincode uses npm install at the time of container building, which is slow and might fail due to network problems, while Golang just compiles the source code without fetching anything. Chaincode features are introduced to Golang chaincode first and then later on to

问题 After normal run the ./startFabric.sh(it shows as follow ): 2017-07-21 07:47:37.477 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 00a Chaincode invoke successful. result: status:200 2017-07-21 07:47:37.477 UTC [main] main -> INFO 00b Exiting..... Total execution time : 364 secs ... Then I try to run npm install in the \facbar But I get err again . $ npm install > grpc@1.2.4 install C:\Users\Lenovo.WIN10-20170627G\Desktop\fabric-samples- release\fabcar\node_modules\grpc > node-pre-gyp

问题 I need to calculate the difference between "the timestamp when transaction is submitted" and "the timestamp when transaction is committed". Is it possible to get the tx committed (or completed) timestamp in fabric? I tried to use Hyperledger Explorer running on my composer channel. I can see tx timestamp inside the block. But I am not sure whether it is creation or committing timestamp. Also, can I convert explorer timestamp to ISO 8601 format? Please help me on this. 回答1: The timestamp you

问题 I am getting Error: Common connection profile is missing this client's organization and certificate authority Error, while running gateway.getClient().getCertificateAuthority() code line. My connection profile file is there and as per my understanding it has no issues. Following is my nodejs client code. 'use strict'; const { FileSystemWallet, Gateway, X509WalletMixin } = require('fabric-network'); const path = require('path'); const ccpPath = "../connection-ogr4.json"; async function main()

问题 I'm trying to build a network with two orders using Kafka. In the first network example there is a script named./script.sh that creates a channel with an associated orderer that runs this command: peer channel create -o orderer.example.com:7050 -c $CHANNEL_NAME -f ./channel-artifacts/channel.tx --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem >&log.txt I already

问题 I'm trying to build a network with two orders using Kafka. In the first network example there is a script named./script.sh that creates a channel with an associated orderer that runs this command: peer channel create -o orderer.example.com:7050 -c $CHANNEL_NAME -f ./channel-artifacts/channel.tx --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem >&log.txt I already

问题 Consider the Organization-Peer setup in a Hyperledger Fabric network as shown in the image. Org 1 has two peers, Org 2 has one peer - all of which exist inside the same channel - X. Org 3 has one peer which exist outside in a different channel. The peers have distinct chaincodes(c1, c2, c3 & c4) installed in each of them with the functions as explained. write() - put a key-value pair into the ledger update() - update a value for an existing key read() - query an existing key-value pair Now on