fabric-chaincode-ocaml

OCaml support for smart contracts in Hyperledger Fabric

The repository contains three OCaml packages:

grpc: OCaml binding to libgrpc core
grpc-protoc-plugin: link between services defined by ocaml-protoc-plugin and the grpc library. Instantiate server and client of grpc with the definition derived from a protobuf file by ocaml-protoc-plugin
fabric-chaincode-shim: define the actual shim for defining chaincode for Hyperledger Fabric, using grpc-protoc-plugin and the protobuf file of Hyperledger Fabric.

A specific version of ocaml-protoc-plugin is currently used. It is specified using a submodule.

Installation in development mode

The installation of the different dependencies is done in the repository using opam 2.1 with:

git clone https://github.com/bobot/fabric-chaincode-ocaml.git
cd fabric-chaincode-ocaml
opam install --deps-only .

Hyperledger Fabric Development mode

The script ./fabric-chaincode-shim/tests/peer-chaincode-devmode.sh TMPDIR start a shell after starting an hyperledger fabric in development mode. Don't forget to remove the temporary directory before restarting it. then inside the new shell a test using the OCaml shim can be started with:

dune exec -- fabric-chaincode-shim/tests/test.exe 127.0.0.1:7052 &
CORE_PEER_ADDRESS=127.0.0.1:7051 peer chaincode invoke -o 127.0.0.1:7050 -C ch1 -n mycc -c '{"Args":["query","a"]}'