Harmony

Dev Environment Setup

export GOPATH=$HOME/<path_of_your_choice>

mkdir -p $HOME/<path_of_your_choice>/src/github.com/harmony-one

cd $HOME/<path_of_your_choice>/src/github.com/harmony-one

git clone git@github.com:harmony-one/harmony.git

cd harmony

go get ./...

git submodule update --init --recursive

Build

Harmony server / main node:

go build -o bin/harmony cmd/harmony.go

Beacon node:

go build -o bin/beacon cmd/beaconchain/main.go

Wallet:

go build -o bin/wallet cmd/client/wallet/main.go

Tx Generator:

go build -o bin/txgen cmd/client/txgen/main.go

You can also run the script ./scripts/go_executable_build.sh to build all the executables.

Some of our scripts require bash 4.x support, please install bash 4.x on MacOS X.

Usage

You may build the src/harmony.go locally and run local test.

Running local test

The deploy.sh script creates a local environment of Harmony blockchain devnet based on the configuration file. The configuration file configures number of nodes and their IP/Port. The script starts one local beacon chain node, the blockchain nodes, and run a transactional generator program which generates and sends simulated transactions to the local blockchain.

./test/deploy.sh ./test/configs/local_config1.txt

Testing

Make sure you use the following command and make sure everything passed before submitting your code.

./test/test_before_submit.sh

License

Harmony is licensed under the MIT License. See LICENSE file for the terms and conditions.

Also please see our Fiduciary License Agreement if you are contributing to the project. By your submission of your contribution to us, you and we mutually agree to the terms and conditions of the agreement.

Contributing To Harmony

See CONTRIBUTING for details.

Development Status

Features Done

Basic consensus protocol with O(n) complexity
Basic validator server
P2p network connection and unicast
Account model and support for Solidity
Simple wallet program
Mock beacon chain with static sharding
Information disposal algorithm using erasure encoding (to be integrated)
Blockchain explorer with performance report and transaction lookup
Transaction generator for loadtesting

Features To Be Implemented

Full beacon chain with multiple validators
Resharding
Staking on beacon chain
Fast state synchronization
Distributed randomness generation with VRF and VDF
Kademlia routing
P2P network and gossiping
Full protocol of consensus with BLS multi-sig and view-change protocol
Integration with WASM
Cross-shard transaction

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