parodyBit/witnet-price-feeds

Price feed examples using the Witnet decentralized oracle network

witnet-price-feeds

This repository contains the price feeds currently mantained by the Witnet Foundation within all the EVM-compatible networks supported by the Witnet oracle.

Usage

Install repo

• npm install
• npm run flatten

List Witnet-supported networks

• npm run avail:networks

List available price feeds

• npm run avail:feeds

List deployed addresses

• See contents of migrations/addresses.json

Create new Witnet price update query

• Add new .js file into queries/ folder.
• Follow examples available in same folder, or this tutorial.
• Compile JS queries into CBOR-encoded bytecodes: npm run compile:queries A new entry will be added to migrations/witnet-queries.json file, named after the new .js

Try out Witnet price update queries

• Run this command: npm run try-query:js <path_to_js_file>

Deploy new WitnetPriceFeed instance

• Specify fields base, quote and decimals within the corresponding entry in migrations/witnet.request.json, if not yet done so.
• Add empty string into the appropiate network section within migrations/addresses.json file, named after the Witnet price update request you want to deploy. E.g.:

  {
    ...    
    "boba": {
      ...
      "boba.mainnet": {
        ...
        "OmgBtcPriceFeed": """
      },  
    }
  }
  

• `npm run migrate <network.name>´
• Type "y" + [ENTER] when asked for permission to update the WitnetPriceRouter contract.

Update an already deployed WitnetPriceFeed instance:

• Remove address from the corresponding entry within migrations/addresses.json
• npm run migrate <network.name>
• Type "y" + [ENTER] when asked for permission to update the WitnetPriceRouter contract.