five-bells-trader v1.0.1

Five Bells Trader

A reference implementation of the Five Bells Trader API

Usage

You can see the trader in action as part of the five-bells-demo!

To run the trader as a standalone server, follow these directions.

Note: You need two five-bells-ledger instances to trade between.

Step 1: Clone repo

git clone https://github.com/intertrader/five-bells-trader.git
cd five-bells-trader

Step 2: Install dependencies

npm install

Step 3: Run it!

npm start

Configuration

General

• TRADER_BIND_IP (default: 0.0.0.0) IP that Five Bells Trader will bind to.
• TRADER_PORT (default: 4000) Port that Five Bells Trader will listen on.
• TRADER_HOSTNAME (default: your hostname) Publicly visible hostname. This is important for things like generating globally unique IDs. Make sure this is a hostname that all your clients will be able to see. The default should be fine for local testing.
• TRADER_PUBLIC_PORT (default: $PORT) Publicly visible port. You can set this if your public port differs from the listening port, e.g. because the trader is running behind a proxy.
• TRADER_PUBLIC_HTTPS (default: '') Whether or not the publicly visible instance of Five Bells Trader is using HTTPS.

Trading

• TRADING_PAIRS (default: []) Pairs to trade on, ex.

[
  [
    'USD@http://ledger1.example',
    'EUR@http://ledger2.example'
  ],[
    'EUR@http://ledger2.example',
    'USD@http://ledger1.example'
  ]
]

• TRADER_CREDENTIALS (default: {}) Trader's login credentials, ex.

{
   "<ledger_uri>": {
     "account_uri": "...",
     "username": "...",
     "password": "..."
   }
}

• TRADER_DEBUG_AUTOFUND (default: '') Debug feature which uses corresponding ledger debug
• TRADER_FX_SPREAD (default: 0.002 =.2%) How much of a spread to add on top of the reference exchange rate. This determines the trader's margin.
• TRADER_MIN_MESSAGE_WINDOW (default: 1) Minimum time the trader wants to budget for getting a message to the ledgers its trading on. In seconds.
• TRADER_MAX_HOLD_TIME (default: 10) Maximum duration the trader is willing to place funds on hold while waiting for the outcome of a transaction. In seconds.

Running with Docker

This project can be run in a Docker container.

docker run -it --rm -e PORT=4000 quay.io/ripple/five-bells-trader

Breaking down that command:

• -it Run Five Bells Trader in an interactive terminal.
• --rm Delete container when it's done running.
• -e PORT=4000 Set the trader's port to 4000. This is just an example for how to set a config option.