Blockchain Development for Finance Projects

Setting up the contract interfaces

We need to set up interfaces that our app will use in order to interact with the smart contracts that will be deployed to our blockchain:

1. Within the contracts folder, create the Gold.js, USD.js, and OrderbookABI.js files.
2. Open the Gold.js file in a text editor.
3. With the file open, navigate to your Truffle project environment that you used to deploy the smart contracts.
4. In the Truffle environment, locate the build directory. Under build, you'll have the Gold.json build file.
5. Open the file, and locate the ABI contract . It should look like the code that follows.
6. Copy this entire ABI, and paste it in OrderbookABI.js as a parameter, as follows:

export default { abi: [    {      "constant": true,      "inputs": [], "name": ...