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The Payment Pals

This project is bootstrapped from the drizzle Truffle box, so it includes everything we need to start using smart countracts from a react app.

Prerequisites

Software Dependencies

  • Node.js Required to install packages such as Truffle and React.
  • Truffle Used for compiling and deploying contracts.

Check your versions using truffle version. This project was made using:

Truffle v5.1.10 (core: 5.1.10)
Solidity v0.5.16 (solc-js)
Node v10.16.3
Web3.js v1.2.1

Shared Ethereum Wallet

For this project we will be testing on Rinkeby. We load the secrets via files called .mnemonic and .infura. Contact Casey for these.

Getting Started

  1. Install node modules, i.e. OpenZeppelin npm install
  2. Run the development console truffle develop
  3. Compile and migrate the smart contracts. Note inside the development console we don't preface commands with truffle.
compile
migrate
  1. In the app directory, we install the node modules, then run the React app. Smart contract changes must be recompiled and migrated.
// in another terminal (i.e. not in the truffle development prompt)
cd app
npm install
npm run start
  1. Truffle can run tests written in Solidity or JavaScript against your smart contracts. Note the command varies slightly if you're in or outside of the development console.
// inside the development console
test

// outside the development console
truffle test
  1. Jest is included for testing React components. Compile your contracts before running Jest, or you may receive some file not found errors.
// ensure you are inside the app directory when running this
npm run test
  1. To build the application for production, use the build script. A production build will be in the app/build folder.
// ensure you are inside the app directory when running this
npm run build

Solidity console.log using Buidler

To have console.log, follow these steps:

  1. From root directory, run npx buidler node
  2. In seperate terminal, run npx buidler run deploy.js --network localhost to compile contracts, take note of the deployed contract address.
  3. Copy the artifact PaymentHub.json from /artifactsto /app/arc/contracts
  4. Append this networks key to the bottom of the artifact json object:
  "networks": {
    "31337": {
      "events": {},
      "links": {},
      "address": "0xa4bcDF64Cdd5451b6ac3743B414124A6299B65FF",
      "transactionHash": "0x320692bd72b17af0be036b5d59fe799be3a7ce336a1a2e3d3de72fa51db0d146"
    }
  }
  1. Run npm run start in app directory.

The dApp will now be available and console.logs within PaymentHub will be visible in the console running the buidler node!