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I am learning Hyperledger Fabric for Enterprise Blockchain. I have setup a network of an organization with orderer, ca, peer and cli running as docker containers(I will be setting up other organizations on other computers instead of dockerzing the whole process).

1.I want to know how I can use hyperledger composer in the scene. I would like to code and deploy chaincode on the channel I have setup, but I am clueless how to do so using composer.

2.The documentation of Composer has steps which involve setting up and run their blockchain docker files.

My efforts :

Went through composer documentation but to no avail. I have traversed createPeerAdminCard.sh and modified it to generate card using peer channel-artifacts of my blockchain network. But on importing it to composer via cli or composer-playground, I see None under the Business Network section of the card on browser interface of fabric-composer.

Please help as I am stuck on this problem for quite long. image of composer-playground output

Has anyone succeeded in running fabric-composer on windows 10 linux sub-system running ubuntu 16.04 ?

I am studying and trying out to deploy a Hyperledger Composer Business Network to Fabric Multiple Org as per the tutorial https://hyperledger.github.io/composer/latest/tutorials/deploy-to-fabric-multi-org

I have done all the steps exactly as required .

I am getting an error during the composer ping step

Is fabric-composer supported on Windows? https://fabric-composer.github.io/tasks/prerequisites.html

How can I get an invitation to the Slack channel? https://fabric-composer.github.io/support/index.html

I have created a network composed by two nodes using this tutorial: Multiple Machine.

In the node with orderer and ca installed, I can use the composer-playground to interact with the blockchain. Instead, analysing the logs of the docker on the second node, I am able to see the communication between the nodes but I am not able to access the data.

How can I access data on the second machine?

It is a simple node connect to the first node (where is installed the orderer and the ca).

Thanks,

I am confused as to what data type my fabric ledger transactions need to return.

The sample-network makes believe a Promise needs to be returned, but it isn't clear to me if the a Promise is the expected return value and/or if the returned Promise needs to return any particular type (e.g. String or a boolean).

Using the definitions created using fabric-composer, can one generate the chaincode and individual nodejs components i.e REST API and UI ? So that it can be later run without using fabric-composer?

I'm having problems with 'npm install' step in the the Fabric Composer Quickstart guide -- https://fabric-composer.github.io/installing/quickstart.html

My system levels are:

Ubuntu 16.04 LTS Docker version 1.12.6, build 78d1802 docker-compose version 1.12.0-rc2, build 08dc2a4 node v6.9.4 git 2.7.4

I installed the command line tools: npm install -g composer-cli

Cloned the sample apps repository: git clone https://github.com/fabric-composer/sample-applications.git

cd'ed to the sample apps dir: cd sample-applications/packages/getting-started

ran 'npm install' where I got the following error in the Deploying business network from archive digitalPropertyNetwork.bna step:

... Found: Description:Digital Property Network Name:digitalproperty-network Identifier:digitalproperty-network@0.0.6

Written Business Network Definition Archive file to digitalPropertyNetwork.bna Command completed successfully. Deploying business network from archive digitalPropertyNetwork.bna Business network definition: Identifier: digitalproperty-network@0.0.6 Description: Digital Property Network events.js:160 throw er; // Unhandled 'error' event ^

Error at ClientDuplexStream._emitStatusIfDone (/home/bill/blockchain-fabric-composer/sample-applications/packages/getting-started/node_modules/grpc/src/node/src/client.js:189:19) at ClientDuplexStream._readsDone (/home/bill/blockchain-fabric-composer/sample-applications/packages/getting-started/node_modules/grpc/src/node/src/client.js:158:8) at readCallback (/home/bill/blockchain-fabric-composer/sample-applications/packages/getting-started/node_modules/grpc/src/node/src/client.js:217:12)

npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! getting-started@1.0.0 deployNetwork: composer archive create --sourceName digitalproperty-network --sourceType module --archiveFile digitalPropertyNetwork.bna && composer network deploy --archiveFile digitalPropertyNetwork.bna --enrollId WebAppAdmin --enrollSecret DJY27pEnl16d && composer network list -n digitalproperty-network --enrollId WebAppAdmin --enrollSecret DJY27pEnl16d npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the getting-started@1.0.0 deployNetwork script 'composer archive create --sourceName digitalproperty-network --sourceType module --archiveFile digitalPropertyNetwork.bna && composer network deploy --archiveFile digitalPropertyNetwork.bna --enrollId WebAppAdmin --enrollSecret DJY27pEnl16d && composer network list -n digitalproperty-network --enrollId WebAppAdmin --enrollSecret DJY27pEnl16d'. npm ERR! Make sure you have the latest version of node.js and npm installed. npm ERR! If you do, this is most likely a problem with the getting-started package, npm ERR! not with npm itself. ...

Any ideas?

none of the ports which appear to be used by the fabric containers (7050-7054) are in use prior to running nps install according to netstat -a.

I'm attaching the full output from 'npm install' along with the 'docker ps' command result after it runs:

I am bit confused to understand role and responsibilities of core composer runtime and composer platform runtime.

Different component of fabric-composer architecture:

Kindly explain in details of core runtime, runtime container and composer platform runtime, also cover following question:

will there be different instance of composer platform runtime for each deployed business network?