Hello Token

This is a simple mock project to develop smartcontracts to deploy to Ethereum network using Truffle framework or Web3.js.

Quick Start

Set environment variables in .env file and type npm test to call a property method for pre-deployed HelloToken smart contract.

Smart Contracts

Contracts written in Solidity will be placed in ./contracts directory. (see truffle-config.js to modify the directory)

• HelloToken.sol: A simple contract that has public fields(name, nextTokenId) and methods (mint, getData).
• Migrations.sol: This is provided by Truffle and used for deployment by truffle migrate.

Environment variables

Please refer to .env.sample and create .env to provide secret info such as private keys, Infura ID.

Compile

To compile smart contracts, type truffle compile. Use --all option to recompile everyting if needed.

The compiled output is a json file called Artifacts and saved in ./contracts directory. (Hello.token.json. See truffle-config.js to modify the directory) ABI and bytecode will be saved in the json file.

Deploy

There are two ways to deploy. By A) Truffle or B) Web3.js.

A) Truffle

1. truffle develop to launch local network. (see truffle-config.js to modify the host 127.0.0.1:9545)

2. migrate to deploy smartcontracts specified in ./migrations/2_deploy_contracts.js.

B) Web3.js

A sample test file ./test/web3Test.ts is provided. It uses ./src/services/web3/web3.service.ts library.

The web3.service is created to deploy smart contracts, send transactions, and interact with smart contracts.