HIVE Price Feed

A price feed application written in NodeJS for witnesses on the Hive network.

Features

• Application resilience with NodeJS restart on crash/exit.
• Automatic RPC switching.
• Volume Weighted Average Price (VWAP) from several cryptocurrency exchanges.
• Supported exchanges: Binance, Bittrex, Huobi, Ionomy, Probit, Upbit.

Docker Install (recommended)

sudo apt install -y jq
git clone https://github.com/Jolly-Pirate/pricefeed.git
cd pricefeed
chmod +x run.sh
./run.sh install_docker
./run.sh build
cp app/config.json.example app/config.json
chmod 600 app/config.json

Edit the file app/config.json accordingly (see the Configuration section below), then start the container with

./run.sh start

Check that it's running fine with ./runs.sh logs
Type ./run.sh without arguments for a list of options.

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Npm Install (on Ubuntu 22.04)

Alternate steps to the docker installation procedure.
Requires NodeJS >7.6 (for the async functions).
Recommend to use NVM (Node Version Manager).

sudo apt update
sudo apt install -y curl
curl https://raw.githubusercontent.com/creationix/nvm/master/install.sh | bash
nvm install stable
nvm use stable

git clone https://github.com/Jolly-Pirate/pricefeed.git
cd pricefeed
cp app/config.json.example app/config.json
chmod 600 app/config.json

Edit the file app/config.json accordingly (see the Configuration section below), then start the app with

npm install
npm start

Screen session example

Start and enter a screen session: screen -S pricefeed
Start the script: npm start
Detach from the screen session with CTRL-a-d. This will leave it running in the background.
Reattach to the session with screen -x pricefeed to monitor its status.
If you want to terminate the script press CTRL-c, then type exit to close the session.

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Configuration

The configuration is located in the file app/config.json.

• witness: witness account
• privateActiveKey: private active key of the witness account
• interval: delay between each feed publishing.
• peg: set to true only if you want to adjust your price feed bias.
• peg_multi: if the peg is enabled, then this will change the "quote" to 1 / peg_multi, e.g. a peg_multi of 2 it will show a 100% bias on the feed.
• testmode: when set to true, the script won't broadcast the price feed to the blockchain, good for testing or checking the price on the different exchanges
• hiverpc: array of Hive RPC nodes

The different exchanges can be enabled/disabled with true or false. Always keep an eye on the exchange prices/volumes and edit their setting accordingly, then restart the price feed.

Acknowledgment

Some parts were based on someguy123's steemfeed-js and steem-in-a-box.