simonmullaney/SimplifiedDistributedExchange

The BFX challenge

A simplified distributed exchange

• Each client will have its own instance of the orderbook.
• Clients submit orders to their own instance of orderbook. The order is distributed to other instances, too.
• If a client's order matches with another order, any remainer is added to the orderbook, too.

Requirement:

• Use Grenache for communication between nodes
• Simple order matching engine
• You don't need to create a UI or HTTP API

Running simplified distributed exchange

Setting up the DHT

npm i -g grenache-grape

# boot two grape servers

grape --dp 20001 --aph 30001 --bn '127.0.0.1:20002'
grape --dp 20002 --aph 40001 --bn '127.0.0.1:20001'

Setting up Grenache in your project

npm install --save grenache-nodejs-http
npm install --save grenache-nodejs-link

Clone this repository

git clone https://github.com/simonmullaney/SimplifiedDistributedExchange.git

Running simplified distributed exchange

Setting up the DHT

npm i -g grenache-grape

# boot two grape servers

grape --dp 20001 --aph 30001 --bn '127.0.0.1:20002'
grape --dp 20002 --aph 40001 --bn '127.0.0.1:20001'

Setting up Grenache in your project

git clone https://github.com/simonmullaney/SimplifiedDistributedExchange.git

Setting up the RPC server

Change directory into rpcSever and run:

npm i
node server.js

Setting up the Clients

Change directory into client1 and client2 respectively and run:

npm i
node client.js

As each client is started they will automatically send preconfigured trades to the RPC server.

You can change the payload of the respective clients to send different messages to the RPC server:

const payload = {id:"client1",trade: "Buy", pair: "tBTCUSD", amount: 1.0860}

Re-run the client with the new payload to send your new message to the RPC server.

Limitations:

• Not properly tested, no test suite to guarantee required functionality
• Race conditions need some more thought and need tests written to ensure correct functionality