Article directory
-
- 1. Project preparation
- 2. Wallet-related concepts
- 3. Randomly create a wallet
- 4. Import the wallet according to the mnemonic
- 5. Import wallet according to keystore
- 6. Signature transfer
1. Project preparation
- Install ether.js
npm install --save ethers
Three ways to introduce ether.js:
- es3:
var ethers = require('ethers');
- es5/es6
const ethers = require('ethers');
- javascript/typescript-es6
import ethers from 'ethers';
2. Wallet-related concepts
The default here is that you already understand the relationship between address, password, private key, mnemonic, and Keystore, so I won’t introduce too much, just list the relationship between them:
address = bank card number password = bank card password Private key = bank card number + password Mnemonic phrase = bank card number + password Keystore = encrypted private key Keystore + password = private key
3. Randomly create a wallet
The Wallet class of ethers used:
ethers.Wallet.createRandom()
createRandom returns a new wallet with a random private key, generated from a cryptographically secure source of entropy. An error is thrown if the current environment does not have a safe source of entropy.
Wallets created using this method will have the mnemonic phrase
createNewWallet() {<!-- -->
let walletRandom = ethers. Wallet. createRandom()
// wallet mnemonic object
let mnemonic = walletRandom.mnemonic
//Wallet mnemonic words
let phrase = mnemonic. phrase
//path: "m/44'/60'/0'/0/0",
let path = mnemonic.path
// wallet address
let address = walletRandom.address
//Wallet public key
let publicKey = walletRandom. publicKey
//Wallet private key
let privateKey = walletRandom. privateKey
//Generate the keystore file through the password set by the user
let password = "123456"
walletRandom.encrypt(password).then((keystory_string) => {<!-- -->
let keystory_json = JSON. parse(keystory_string)
//The keystore string of the wallet
this.keystory = keystory_string
console.log(keystory_json)
})
\t
//The mnemonic of the wallet can be encrypted and stored locally through AES symmetric encryption
let encryptPassword = "1234qwer"
let encryptedPhrase = encryption(phrase, encryptPassword)
console.log('encrypted mnemonic:', encryptedPhrase)
let decryptedPhrase = decryption(encryptedPhrase, encryptPassword)
console.log('decrypted mnemonic:', decryptedPhrase)
}
import * as CryptoJS from 'crypto-js'
//Data symmetric encryption
function encryption(data, password) {<!-- -->
let encrypted = CryptoJS.AES.encrypt(data, password);
return encrypted. toString()
}
//Data decryption
function decryption(encrypted, password) {<!-- -->
let decrypted = CryptoJS.AES.decrypt(encrypted, password);
return decrypted.toString(CryptoJS.enc.Utf8);
}
4. Import the wallet according to the mnemonic
ethers.Wallet.fromMnemonic( mnemonic [ , path , [ wordlist ] ] ) ? Wallet
Create an instance from a mnemonic phrase.
If no path is specified, the default path of Ethereum (such as m/44’/60’/0’/0/0) will be used.
If wordlist is not specified, English Wordlist is used.
async createWalletByPhrase() {<!-- -->
//default path
let path = ethers.utils.defaultPath
//Wallet mnemonic words to be imported
let phrase =
'able fee damage express distress visit fine claim similar attract awkward market'
let mnemonic = ethers.Wallet.fromMnemonic(phrase)
//Wallet private key
let privateKey = mnemonic. privateKey
\t
//Create a wallet instance through the wallet private key
let wallet = new ethers. Wallet(privateKey)
//Wallet public key
let publicKey = wallet. publicKey
// wallet address
let address = wallet.address
//Generate the keystore file through the password set by the user
let password = "123456"
wallet.encrypt(password).then((keystory_string) => {<!-- -->
let keystory_json = JSON. parse(keystory_string)
let keystory = keystory_string
console.log(keystory_json)
})
}
5. Import wallet according to keystore
ethers.Wallet.fromEncryptedJson( json , password [ , progress ] ) ? Promise< Wallet >source
Create an instance from an encrypted JSON wallet.
If progress is provided, it will be called during decryption with a value between 0 and 1, indicating a completed progress.
createWalletByKeystory() {<!-- -->
\t
//Wallet keystore to be imported
let keystory =
'{"address":"df9e902814baba3ddc6b4a1ac9db11bc79eda07f","id":"60db3db5-ef64-400a-b25e-3615a9bdfa24","version":3,"crypto":{ "cipher":"aes-128-ctr","cipherparams":{"iv":"f4c7ece791d112dc408537203aa2bb10"},"ciphertext":"acba3333e3d7078e2186ebd561c28bf0e4a8c105e4b1eec40bec20616441cc31"," kdf":"scrypt","kdfparams":{"salt":"f1e8acd43868559c1ecda1c9b31489efd12f6c7c9302710b957a3b779dd6ec54","n":131072,"dklen":32,"p" :1,"r":8},"mac":"e466473ae761f98b1f26354e27305ce23e41b5d5c8a5674b65675bdfbf848718"},"x-ethers":{"client":"ethers.js"," gethFilename":"UTC--2023-03-25T03-36-38.0Z--df9e902814baba3ddc6b4a1ac9db11bc79eda07f","mnemonicCounter":"e4482220566b9a9f9d821c1352d1708f","mnemonicCiphertext":"7357682acae64479641611e17e1c6473",\ "path":"m/44'/60'/0'/0/0","locale":"en","version":"0.1" }}'
//Change the password used when the keystore was created
let password = "123456"
ethers.Wallet.fromEncryptedJson(keystory, password).then((wallet) => {<!-- -->
console.log('wallet instance:', wallet)
// wallet address
let address = wallet.address
//Wallet public key
let publicKey = wallet. publicKey
//Wallet private key
let privateKey = wallet. privateKey
// default path
let path = ethers.utils.defaultPath
})
}
6. Signature transfer
async sendTransaction() {<!-- -->
//ETH
// let network = 'goerli'
// let contractAddress = ''
//Polygon
// let network = 'maticmum'
// let contractAddress = ''
//BSC
// let network = 'https://bsc-dataseed.binance.org/'
let network = 'https://data-seed-prebsc-1-s1.binance.org:8545/'
let contractAddress = ''
//Use Infura as RPC
//let projectId = ''
// let provider = new ethers.providers.InfuraProvider(network, projectId)
let provider = new ethers.providers.JsonRpcProvider(network);
let privateKey = '0x0fb9146e20a3bd3497b47de967316c8aa7f83818ddc62429a24774f0df1f8065'
let wallet = new ethers. Wallet(privateKey, provider)
// let balance = await wallet. getBalance('latest')
// console.log('balance:', balance)
// console.log('balance:', ethers.utils.formatEther(balance))
// console.log(await wallet.getChainId())
// return
/**
//ETH transfer
let tx = {
to: '',
value: ethers.utils.parseEther('0.001'),
chainId: ethers.BigNumber.from('5').toHexString()
}
let res = await wallet. sendTransaction(tx)
console. log(res)
*/
/**
*
//Use signers for ERC20 transfer
let contract = new ethers.Contract(contractAddress, GBK.abi, wallet)
console. log(contract)
let balance = await contract.balanceOf(wallet.address)
balance = ethers.utils.formatEther(balance)
console. log(balance)
let res = await contract. transfer('', ethers. utils. parseUnits('1'))
console. log(res)
*/
}