Lino Price Feeder

This is a simple implementation of a lino price feeder. It queries the price from multiple exchanges, and take a median price of all.

Usage

Build

make build
./bin/lino-price-feeder

Print Current Prices

Example:

./bin/lino-price-feeder price --config example.config.json

Feed

Example:

$ ./bin/lino-price-feeder feed validatorX --config example.config.json --priv-key @validatorX.key
Password of validatorX.key:

Configuration

An example config:

{
  "chain_id": "lino-testnet-upgrade5",
  "node_url": "tcp://18.213.116.0:26657",
  "max_tx_fee_lino": "0.5",
  "max_retry": 10,
  "retry_interval_sec": 20,
  "feed_every_sec": 650,
  "rest_api_list": [
    {
      "name": "binance",
      "endpoint": "https://api.binance.com/api/v3/ticker/price?symbol=BTCUSDT",
      "json_path": "price"
    },
    {
      "name": "huobi",
      "endpoint": "https://api.huobi.pro/market/trade?symbol=btcusdt",
      "json_path": "tick.data.0.price"
    },
    {
      "name": "coinbase",
      "endpoint": "https://api.coinbase.com/v2/prices/BTC-USD/spot",
      "json_path": "data.amount"
    }
  ]
}

This config queries the BTC-USD price from binance, huobi, and coinbase for example. It will feed price to the blockchain every 650 seconds. When feediing faield, it will retry every 20 seconds, and it will panic if there are 10 errors in a row. The maximum transaction fee is 0.5 lino.

node-a-team / lino-price-feeder