V3 keystore.

This example demonstrates how to encrypt and decrypt keystore V3.

Import the Web3 class from the @kaiachain/web3js-ext package.

Set up the provider and define a web3 instance using the provider.

Encrypted key and password information are declared.

You can also create a key with the web3.eth.accounts.create().encrypt() function.

Decrypt account from the encryptedKey with the password.

You can check address and privateKey of the account.

Encrypt the account with another password2. And it will make another encryptedKey2.

Re-decrypt the account2 from encryptedKey2 with password2 and check if the address and privateKey of the account2 are same with the info of the account from encryptedKey.

Because the account2 is same to account and already exists in the wallet, so we need to delete existing account with the web3.eth.accounts.wallet.remove() function before re-decrypting account2.

Execute the main function.

keystoreV3.js


const { Web3 } = require('@kaiachain/web3js-ext')
const provider = new Web3.providers.HttpProvider(
  'https://public-en-kairos.node.kaia.io'
)
const web3 = new Web3(provider)
// Web3 V3. web3.eth.accounts.create(1).encrypt("password")
const encryptedKey = `{
    "address": "029e786304c1531af3ac7db24a02448e543a099e",
    "id": "9d492c95-b9e3-42e3-af73-5c77e932208d",
    "version": 3,
    "crypto": {
      "cipher": "aes-128-ctr",
      "cipherparams": {"iv": "bfcb88a1501e2bb1e6694c03da18953d"},
      "ciphertext": "076510b4e25d5cfc31239bffcad6036fe543cbbb04b9f3ec719bf4f61b58fc05",
      "kdf": "scrypt",
      "kdfparams": {
        "salt": "79124f05995aae98b3088d8365f59a6dfadd1c9ed249abae3c07733f4cbbee53",
        "n": 131072,
        "dklen": 32,
        "p": 1,
        "r": 8
      },
      "mac": "d70f83824c2c30dc5cd3a244d87147b6aa713a6000165789a82a467651284ac7"
    }
  }`
// const address = "0x029e786304c1531aF3aC7db24A02448e543A099E";
// const key = "0x1b33a48f58d8c85ab142a7375fcf18714d88271f6647cfa6b54f1be66b05a762";
const password = 'password'
const password2 = 'password2'
async function main() {
  web3.eth.accounts.wallet
    .decrypt([JSON.parse(encryptedKey)], password)
    .then((account) => {
      console.log('\ndecrypted address')
      console.log(account[0].address)
      console.log('\ndecrypted privateKey')
      console.log(account[0].privateKey)
      web3.eth.accounts.wallet.encrypt(password2).then((encryptedKey2) => {
        // Delete account before adding the same account already existing in the wallet.
        web3.eth.accounts.wallet.remove(encryptedKey2[0].address)
        web3.eth.accounts.wallet
          .decrypt(encryptedKey2, password2)
          .then((account2) => {
            console.log('\ndecrypted address with new password')
            console.log(account2[0].address)
            console.log('\ndecrypted privateKey with new password')
            console.log(account2[0].privateKey)
          })
      })
    })
}
main()

output


❯ node keystoreV3.js
decrypted address
0x029e786304c1531af3ac7db24a02448e543a099e
decrypted privateKey
0x1b33a48f58d8c85ab142a7375fcf18714d88271f6647cfa6b54f1be66b05a762
decrypted address with new password
0x029e786304c1531af3ac7db24a02448e543a099e
decrypted privateKey with new password
0x1b33a48f58d8c85ab142a7375fcf18714d88271f6647cfa6b54f1be66b05a762