Torchwood

An ethereum library for watching contract changes on the chain.

Setup

• Clone this repo and cd into Torchwood
• npm i
• npm build to build the project (creates release folder with js files & maps)
• npm run package same as npm build, but also creates a package.json file for release and a package.zip
• npm test to run all tests

Using the library

You can use Torchwood to create your own oracle. For this you need:

• A running blockchain
  • e.g. ganache-cli
• Some transactions on the chain
• A config file pointing to the blockchain
• The .sol file of the contract you want to watch
• An oracle file

Getting Torchwood to read contracts not compiled with Torchwood

Torchwood uses the default solcjs settings when compiling, this is equivalent of running solc --optimize which should compile and optimize the contract for 200 runs. If you compiled and deployed the contract using Truffle or another testing framework, make sure that it is compiling the contracts with the optimizer enabled.

Enabling optimizer for Truffle

By default Truffle does not have the optimizer enabled when compiled contracts. To enable the optimizer you must open your truffle.js or truffle-config.js file and adjust your module.exports object to look like the following:

module.exports = {
  solc: { 
    optimizer: { 
      enabled: true, // Enable solc optimizer
    },
  }
};

Follow the README of this sample oracle project that uses Torchwood: https://github.com/liliankasem/torchwood-oracle