[Ethereum] Web3 create account from mnemonic + passphrase

bip39hd-walletsjavascriptweb3js

I'm trying to create an ethereum account using web3-js by providing a mnemonic + passphrase (created with BIP39-js) but can't seem to find an implementation of web3.eth.accounts.create() that accepts both the mnemonic and the passphrase.

Is it not supported or am I missing something on how to implement it?

Best Answer

Do it with ethers:

const ethers = require('ethers');
const mnemonic = await ethers.HDNode.entropyToMnemonic(ethers.utils.randomBytes(16));
const wallet = ethers.Wallet.fromMnemonic(mnemonic);

P.S.

Here is a community you can find ask more questions about it:

Related Solutions

[Ethereum] Creating an account using web3js or web3j

Prior to version 1.0 of web3js - which has the eth.accounts functionality; creating a new account is achieved via


eth.personal.newAccount('password')

which you can find documented here

That said, to achieve this via Node.js you will need to enable 'personal' via RPC - which is inadvisable - or connect via IPC. See this existing answer for more details.

More information on the rpc flag, and parameter, that you would have to provide to enable this can be found on this web3js issue.

[Ethereum] web3.personal.newAccount how to get address

Moreover can anyone tell me the difference of web3.personal.newAccount & web3.eth.accounts.create both are creating accounts and if by second method i store the key in keystore then how can I unlock the account using web3.personal.unlockAccount?

The big difference is:

web3.personal.newAccount is used to generate addresses on the wallet associated with your node/provider. This is misleading as personal method is not necessarily local. Do not use this method unless you are running your own node (i.e. Geth or Parity). If you are using Infura or similar provider service, I doubt you'd want to create a wallet account on their node.
web3.eth.accounts.create will generate a local key pair. If you use this method, definitely make sure to store your key info, as it is only kept TEMPORARY in memory. You can then send transactions with web3.eth.accounts.signTransaction(tx, privateKey), but you have to encode any contract data with an encodeABI method first before placing it in tx. This is not a recommended method, and this approach is used under the hood by browser-based wallet providers like Metamask.

To query the list of accounts controlled by your node wallet use web3.eth.getAccounts(). I need to look into how you can get a list of locally generated addresses.

Best Answer

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[Ethereum] Creating an account using web3js or web3j

[Ethereum] web3.personal.newAccount how to get address

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