mnemonic.computeSeed is not a function (hdwallet.js:318:48)

[srw]

Ethers Version

6.12.1

Search Terms

mnemonic.computeSeed is not a function

Describe the Problem

Self explainable:

doing: var wallet = ethers.HDNodeWallet.fromMnemonic(data) gives the error.

Code Snippet

Again: doing: var wallet = ethers.HDNodeWallet.fromMnemonic(data) gives the error.

Contract ABI

No response

Errors

TypeError: mnemonic.computeSeed is not a function
    at HDNodeWallet.fromMnemonic (node_modules/ethers/lib.commonjs/wallet/hdwallet.js:318:48)

Environment

node.js (v12 or newer)

Environment (Other)

No response

[srw]

Now I understand that mnemonic is a class. So:

var mnemonic = ethers.Mnemonic.fromPhrase(CHATGPT_MNEMONIC)
var wallet = ethers.HDNodeWallet.fromMnemonic(mnemonic);

now gives: TypeError: invalid mnemonic checksum.

[ricmoo]

That’s means the mnemonic is wrong. Either a wrong word was used or more often the order was wrong.

Some people write mnemonics in 2 columns and go left-to-right then top-to-bottom and some use top-to-bottom then left-to-right.

[ricmoo]

(moving to discussions to continue this ;))

[srw]

Could you please give me a random mnemonic phrase that is accepted? Thanks.

[srw]

I traced the error and it is related that you are not handling strings with different encodings. I am not sure we can assume now that the encoding is just plain ascii.

[ricmoo]

It should handle any UTF-8 character, not just ascii. Is your string outside UTF-8?

[srw]

Now I clearly recognize the error, the library is not handling the case where there are trailing '\n' at the end. I assume that the library should handle this case in some way or return a proper error since '\n' is considered like a space or blank in many contexts.

[ricmoo]

That is fair. The Wordlist’s split could trim leading and trailing whitespace. There was a reason I specifically didn’t do that, which I cannot recall; I’ll have to look at the code and see if I can remember why, as it may no longer be relevant…