Centrifuge OS node

go-centrifuge is the go implementation of the Centrifuge OS interacting with the peer to peer network and our Ethereum smart contracts.

Getting help: Head over to our developer documentation at developer.centrifuge.io to learn how to setup a node and interact with it. If you have any questions, feel free to join our slack channel

DISCLAIMER: The code released here presents a very early alpha version that should not be used in production and has not been audited. Use this at your own risk.

Table of Contents

• Installing pre-requisites
• Linux
  • Install Docker Compose
• Mac
  • Install Docker Compose
• Build
• Install
• Running Tests
• Running tests continuously while developing
• Run a Geth node locally or Rinkeby environments
  • Run as local node in dev mode
  • Run local peer connected to Rinkeby
  • Checking on your local geth node
  • Attaching to your local geth node
• Run Integration Tests against Local/Rinkeby Environments
• Configure local dev node run integration/functional tests
• Configure node to point to integration run integration/functional tests
• Configure node to point to rinkeby run integration/functional tests
• Configure node to point to infura-rinkeby run integration/functional tests
• Ethereum Contract Bindings
• Protobufs bindings

Installing pre-requisites

Linux

# Install Go

sudo apt-get update
sudo apt-get -y upgrade

#download go using this command
wget https://dl.google.com/go/go1.11.4.linux-amd64.tar.gz

#extract the archive and move it to /usr/local folder
sudo tar -xvf go1.11.4.linux-amd64.tar.gz
sudo mv go /usr/local

#cd to ~/.profile and add the following lines to the end.
export GOROOT=/usr/local/go
export GOPATH=$HOME/go
export PATH=$GOPATH/bin:$GOROOT/bin:$PATH

# execute this command to use go in the current shell. 
source ~/.profile

# install jq
sudo apt-get install jq

# install truffle framework
npm install -g truffle@4.0.4

# install Dep
curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh

Install Docker Compose

# Run this command to download the latest version of Docker Compose
sudo curl -L https://github.com/docker/compose/releases/download/1.22.0/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose

# Apply executable permissions to the binary
sudo chmod +x /usr/local/bin/docker-compose

Mac

# install jq
brew install jq

# install truffle framework
npm install -g truffle@4.0.4

# install Dep
curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh

Install Docker Compose

Make sure you have docker-compose installed, usually comes bundled with Mac OS Docker. Otherwise: https://docs.docker.com/compose/install/

Build

Build & install the Centrifuge OS Node

mkdir -p $GOPATH/src/github.com/centrifuge/go-centrifuge/
cd $GOPATH/src/github.com/centrifuge/
git clone git@github.com:centrifuge/go-centrifuge.git $GOPATH/src/github.com/centrifuge/go-centrifuge
cd go-centrifuge
make install

Check whether everything is fine by running tests

go test --tags="unit" ./...
go test --tags="integration" ./...

Running Tests

Install packages and dependencies

dep ensure

Run only unit tests

go test --tags="unit" ./...

Run only integration tests:

go test --tags="integration" ./...

For Testworld tests, please refer to the Testworld README

To run integration/functional tests a few other components need to be set up.

• Geth node needs to be up and running
• Contracts need to be deployed
  • Run contract migration (fetched by ENV_VAR CENT_ETHEREUM_CONTRACTS_DIR under build/scripts/test-dependencies/test-ethereum/env_vars.sh )
• Local account keys need to be set and able to call the right contracts on Ethereum

To do this setup + run all the tests (unit, integration, functional) use the test_wrapper.sh script.

Run the whole test-suite with

./build/scripts/test_wrapper.sh

Please note that this testing script is intended for CI testing. Please use the go test commands for unit and integration testing.

Running tests continuously while developing

If you want to run tests continuously when a file changes, you can use reflex:

go get github.com/cespare/reflex

Then run (only for unit tests). It is a good idea to exclude the vendor and ``.idea` folders from scanning by reflex as it hogs a lot of resources for no good reason.

reflex -R '(^|/)vendor/|(^|/)\\.idea/' -- go test ./centrifuge/... -tags=unit

Or run for specific tests only:

reflex -R '(^|/)vendor/|(^|/)\\.idea/' -- go test ./centrifuge/invoice/... -tags=unit

Run a Geth node locally or Rinkeby environments

For development, we make use of Docker Compose locally as it is easy and clear to bundle volume and environment configurations: Docker Compose files live in ./build/scripts/docker

Run as local node in dev mode

Then run the local node via ./build/scripts/docker/run.sh dev By default it uses:

• ETH_DATADIR=${HOME}/Library/Ethereum
• RPC_PORT=9545
• WS_PORT=9546

Run local peer connected to Rinkeby

Let's run the rinkeby local node: ./build/scripts/docker/run.sh rinkeby By default it uses:

• ETH_DATADIR=${HOME}/Library/Ethereum
• RPC_PORT=9545

Override those when needed

Let it catch up for a while until is fully synced with the remote peer

Run Integration Tests against Local/Rinkeby Environments

Configure local dev node + run integration/functional tests

• Remove running container if any:
  • docker rm -f geth-node
• Clear up ~/Library/Ethereum/8383 folder (keep in mind this will clear up all previous data you had before)
  • rm -Rf ~/Library/Ethereum/8383
• In go-centrifuge project run:
  • ./build/scripts/docker/run.sh dev
• Run contract migration to generate local contract address artifact:
  • In centrifuge-ethereum-contracts project:
    • ./build/scripts/migrate.sh localgeth
    • Verify that ./deployments/local.json has been generated (note that local.json is excluded in .gitignore)
• Run tests:
  • To run only integration tests:
    • ./build/scripts/tests/run_integration_tests.sh

Configure node to point to rinkeby + run integration/functional tests

• Remove running container if any:
  • docker rm -f geth-node
• In go-centrifuge project run:
  • ./build/scripts/docker/run.sh rinkeby
  • Wait until node is in sync with remote peer (1-2 hours):
    • geth attach http://localhost:9545 --exec "net.peerCount" > 0 (rinkeby takes additional time to sync as it needs a peer to pull from, and has shortage of full node peers)
    • geth attach http://localhost:9545 --exec "eth.syncing" -> false
• Run tests:
  • To run only integration tests:
    • CENT_CENTRIFUGENETWORK='russianhill' TEST_TARGET_ENVIRONMENT='rinkeby' CENT_ETHEREUM_ACCOUNTS_MAIN_KEY='$JSON_KEY' CENT_ETHEREUM_ACCOUNTS_MAIN_PASSWORD="$PASS" CENT_ETHEREUM_ACCOUNTS_MAIN_ADDRESS="$ADDR" ./build/scripts/tests/run_integration_tests.sh

Configure node to point to infura-rinkeby + run integration/functional tests

• Run tests:
  • To run only integration tests:
    • CENT_ETHEREUM_TXPOOLACCESSENABLED=false CENT_ETHEREUM_NODEURL='wss://rinkeby.infura.io/ws/MtCWERMbJtnqPKI8co84' CENT_CENTRIFUGENETWORK='russianhill' TEST_TARGET_ENVIRONMENT='rinkeby' CENT_ETHEREUM_ACCOUNTS_MAIN_KEY='$JSON_KEY' CENT_ETHEREUM_ACCOUNTS_MAIN_PASSWORD="$PASS" CENT_ETHEREUM_ACCOUNTS_MAIN_ADDRESS="$ADDR" ./build/scripts/tests/run_integration_tests.sh

Ethereum Contract Bindings

To create the go bindings for the deployed truffle contract, use the following command:

abigen --abi abi/AnchorRepository.abi --pkg anchor --type EthereumAnchorRepositoryContract --out ${GOPATH}/src/github.com/centrifuge/go-centrifuge/anchor/ethereum_anchor_repository_contract.go

and then copy the ethereum_anchor_registry_contract.go file to anchors/. You will also need to modify the file to add the following imports:

import(
	ethereum "github.com/ethereum/go-ethereum"
	"github.com/ethereum/go-ethereum/accounts/abi"
	"github.com/ethereum/go-ethereum/accounts/abi/bind"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/event"
)

Protobufs bindings

Create any new .proto files in its own package under protobufs folder. Generating go bindings and swagger with the following command

make proto-all