05-ethersjs-erc20

中文 / English

ethersjs-erc20

About this task

This demo shows the procedure for creating an ERC20 contract using ethers.js

Difference between web3.js and ethers.js can be seen here

Contents

1. Deploy an ERC20 contract Deploying by using depoly.js. In this demo, we use the test network Kovan to deploy the contract, and we need to use an account with Ether to send the transaction.

2. Call the contract Call transfer, balanceof functions of the contract, and check the result.

3. Listen to events Listen Transfer events by using providerContract.once and providerContract.on

How to run this task

1. Install dependencies

   npm install

2. Config .env

   cp .env.example .env
   # replace the xxx and yyy with your own key
   PRIVATE_KEY=xxxxxxxxxxxxxxxx
   INFURA_ID=yyyyyyyy

3. Run it

   node index.js

References

Official documentation:

• https://docs.ethers.io/v4/api-providers.html
• https://docs.ethers.io/v5/getting-started/#getting-started--contracts

Other resources(Chinese):

• https://learnblockchain.cn/docs/ethers.js/api-providers.html
• http://zhaozhiming.github.io/2018/04/25/how-to-use-ethers-dot-js/