hyperledger-composer

问题 I am using hyperledger composer for transaction invocation and all the stuffs related to resource(participants, assets etc) manipulation. I have generated the server using composer-rest-server, and also generated the angular frontend using yeoman generator. This makes me to ask what is the use of fabric sdk? Will I need it in the above mentioned scenario? Please clarify, thanks. 回答1: There are two ways to write chaincode in Hyperledger Fabric, 1) Using GoLang 2) Using NodeJS In order to

问题 Im trying to learn Hyperledger Composer but seems to be a relatively new technology, i mean there are few tutorials and few solutions to a lot of questions, tutorial does not mention possible error case when following the commands and which means there are is also no solution for those errors. I have joined the composer channel in their community chat, looks like its running in Discord or something, and asked the same question without a response, i have a better experience here in SO. This is

问题 I am trying run two org example on tow different nodes acting as Org1 and Org2. I am able to query chaincode. Next I tried installing composer over it. All the steps were successful except when I tried pinging the network. It gave me ENDORSEMENT_POLICY_FAILURE error. For Org1-only and Org2-only connection profiles I have used localhost only. Moreover even though there is endorsement failure error, I can see using blockchain explorer and in logs blocks getting generating using ping command in

问题 Here is what I want to implement: I want to allow user(kind of participant) to create an asset, but do it only in transaction, whereas outside of this transaction I want deny all user rights to create assets. I tried to solve it using condition in rule .acl file using function: rule UserCanCreateAssetOnlyInTransaction { description: "Deny all participants create access to all userWallets if not in transaction" participant(p): "com.example.User" operation: CREATE resource(r): "com.example

问题 In my hyperledger-composer app, I have a transaction processor: async function doSomething(transaction) { //some code // the following line results in error message: const connection = new BusinessNetworkConnection(); await connection.connect('admin@tmy-network'); const result = await connection.query(selectPatientByEmail, { inputValue: email }); //some more code } However, the line const connection = new BusinessNetworkConnection(); causes the following error messsage: ReferenceError:

问题 I'm at the stage of my project where I've Developed the Chaincode (Model,Script,ACL,Queries) Deployed on IBM Cloud Developed Front-end Apps to communicate with the cloud based REST Server Tested the code and business logic through Playground and single user REST server Now I have to add identities, connection-profiles, & business network cards to the mix to make a production-testing ready prototype and to run REST Server on Multi-User Mode. But I'm having trouble with the said things as I can

问题 I've been following the Hyperledger Composer tutorial. I managed to install Ubuntu 16.04 on Hyper-V on my Windows 10 Enterprise. I then started on the following pre-req installation instructions: https://hyperledger.github.io/composer/installing/installing-prereqs.html I ran the prereqs-ubuntu.sh script. It ran fine with no errors. I examined the logs and saw that it had successfully installed npm 5.6.0, node 8.9.4, docker 17.12.x, docker composer 1.13.x, and Python 2.7.12. However, when I

问题 According to hyperledger-composer tutorial, to deploy network with multi-organization I need to clean previous installation of composer: cd ~/fabric-dev-servers ./stopFabric.sh ./teardownFabric.sh After that, I cloned hyperledger/fabric-sample branch git clone -b issue-6978 https://github.com/sstone1/fabric-samples.git Then, navigate to fabric-sample and download specific binaries from the repository with shortened link curl -sSL [shortened-url-here] | bash -s 1.1.0 Right after that, one

问题 I'm using Hyperledger Composer on Fabric v1.0. When stopping Fabric with fabric-tools/stopFabric.sh and then starting with startFabric.sh, the deployed model (.bna file) is no longer there. How do I set the system up so that data will stay there after a system reboot? 回答1: This is an operational consideration for how to set up a fabric environment and as you correctly observe, because our fabric dev server just start up fabric containers, if those containers are destroyed for any reason then

问题 I am trying to upgrade hyperledger fabric business network and I get this error composer archive create -t dir -n . && \ composer network install -a $BNA_FILE -c PeerAdmin@hlfv1 && \ composer network upgrade -c PeerAdmin@hlfv1 -n NETWORK-NAME -V 0.1.23 The version number corresponds to that one in the package.json like the documentation says it should. I get the below error when I run the upgrade command Error: Error trying to upgrade business network. Error: No valid responses from any peers