Flogo extension for Hyperledger Fabric client

This Flogo extension is designed to allow developers to design and implement client apps to invoke Hyperledger Fabric chaincode in the Flogo visual programming environment. This extension supports the following release versions:

• Flogo Web UI
• Hyperledger Fabric 2.2

The Flogo extension supports the following activity to send request of invoke or query to a chaincode deployed on a Hyperledger Fabric network.

• Request: Configure request type in activity setting; Use Flogo CLI plugin flogo configfabric to specify Fabric network configuration.

With these Flogo extensions, Hyperledger Fabric client app can be designed and implemented by using the Flogo Web UI with zero code. The client app can use any other available Flogo triggers and activities implemented by the open-source community of Flogo.

Getting Started

• Setup Fabric chaincode development environment as described in README.md.
• Build and run a sample Flogo app demo as described in README.md. It is an HTTP service that invokes transactions of the Fabric sample asset-transfer-basic

Generate HTTP service to test smart contract

For smart contract developers who do not want to code, you can define chaincode transactions in a JSON file as illustrated here.

You can generate an HTTP service for the contract JSON file, e.g., sample-contract.json, and the test the chaincode for the contract by using HTTP requests as described in README.md.

View and edit Flogo model

You can view and edit the client app implementation in a web-browser. First, start the Flogo Web UI:

docker run -it -p 3303:3303 flogo/flogo-docker eula-accept

Open the Flogo Web UI in a web-browser by using the URL: http://localhost:3303.

Install the following Dovetail contributions, i.e., click the link Install contribution at the top-right corner of the UI, and then enter the following URL to install. If the installation fails, you can follow the Troubleshoot steps below to patch Flogo libs, and then retry the installation.

• github.com/open-dovetail/fabric-client/activity/request
• github.com/open-dovetail/dovetail-contrib/function/dovetail
• github.com/open-dovetail/dovetail-contrib/trigger/rest

You can then import a sample app by selecting the model file samples/basic/demo_basic.json.

Troubleshoot

Failed to import Flogo model

Make sure that you have installed required Flogo contributions listed above.

Failed to install dovetail contributions in Web UI

Refer to the resolution here.