snap_getBip44Entropy command

[MrDonaldBean]

Hi, I'm a really noob user.

I'd like to use the snap_getBip44Entropy command...I've run correctly the "confirmation screen" example of the "getting started" tutorial and I've installed @metamaks/key-tree.

Then I've copied:

{
"initialPermissions": {
"snap_getBip44Entropy": [
{
"coinType": 3
}
]
}
}

in snap.manifest.json and:

import { getBIP44AddressKeyDeriver } from '@metamask/key-tree';

// By way of example, we will use Dogecoin, which has coin_type 3.
const dogecoinNode = await wallet.request({
method: 'snap_getBip44Entropy',
params: {
coinType: 3,
},
});

// Next, we'll create an address key deriver function for the Dogecoin coin_type node.
// In this case, its path will be: m / 44' / 3' / 0' / 0 / address_index
const deriveDogecoinAddress = await getBIP44AddressKeyDeriver(dogecoinNode);

// These are BIP-44 nodes containing the extended private keys for
// the respective derivation paths.

// m / 44' / 3' / 0' / 0 / 0
const addressKey0 = await deriveDogecoinAddress(0);

// m / 44' / 3' / 0' / 0 / 1
const addressKey1 = await deriveDogecoinAddress(1);

// Now, you can ask the user to e.g. sign transactions!

in index.ts

I'm trying to run it but it gives me an error...what am I missing?

Really really sorry for the dummy question, I hope that someone can help me.
I've looked for guides and similar discussions but I wasn't able to get it by myself (it's more than 2 days that I'm stopped here...as I said I'm a noob, unfortunately).
Thanks again

[ritave]

Hello @MrDonaldBean,

To help you out, I'd need a complete, but minimal, snap example. I also need to understand it clearly, could you please format your question in a more understandable way? Having the code properly quoted would be very helpful.

[MrDonaldBean]

Sorry, I'll try to properly quotes.

Basically I've:

• Cloned https://github.com/MetaMask/template-snap-monorepo
• Installed @metamaks/key-tree
• Copied code <1> below into "template-snap-monorepo/packages/snap/snap.manifest.json"
• Copied code <2> below into "template-snap-monorepo/packages/snap/src/index.ts"

code<1>:
{ "initialPermissions": { "snap_getBip44Entropy": [ { "coinType": 3 } ] } }

code<2>:

import { getBIP44AddressKeyDeriver } from '@metamask/key-tree';

// By way of example, we will use Dogecoin, which has coin_type 3.
const dogecoinNode = await wallet.request({
method: 'snap_getBip44Entropy',
params: {
coinType: 3,
},
});

// Next, we'll create an address key deriver function for the Dogecoin coin_type node.
// In this case, its path will be: m / 44' / 3' / 0' / 0 / address_index
const deriveDogecoinAddress = await getBIP44AddressKeyDeriver(dogecoinNode);

// These are BIP-44 nodes containing the extended private keys for
// the respective derivation paths.

// m / 44' / 3' / 0' / 0 / 0
const addressKey0 = await deriveDogecoinAddress(0);

// m / 44' / 3' / 0' / 0 / 1
const addressKey1 = await deriveDogecoinAddress(1);

// Now, you can ask the user to e.g. sign transactions!`

[ritave]

I see you're requesting snap_getBip44Entropy in a global scope. This won't work because we cancel all requests that are done outside of a callbacks such as onRpcRequest.

For example

exports.onRpcRequest = async () => {
  const dogecoinNode = await wallet.request({
    method: 'snap_getBip44Entropy',
    params: { coinType: 3 },
  });
};

[MrDonaldBean]

I've changed "template-snap-monorepo/packages/snap/src/index.ts" into:

// By way of example, we will use Dogecoin, which has coin_type` 3.
exports.onRpcRequest = async () => {
const dogecoinNode = await wallet.request({
method: 'snap_getBip44Entropy',
params: {
coinType: 3,
},
});
};

// Next, we'll create an address key deriver function for the Dogecoin coin_type node.
// In this case, its path will be: m / 44' / 3' / 0' / 0 / address_index
const deriveDogecoinAddress = await getBIP44AddressKeyDeriver(dogecoinNode);

// These are BIP-44 nodes containing the extended private keys for
// the respective derivation paths.

// m / 44' / 3' / 0' / 0 / 0
const addressKey0 = await deriveDogecoinAddress(0);

// m / 44' / 3' / 0' / 0 / 1
const addressKey1 = await deriveDogecoinAddress(1);

// Now, you can ask the user to e.g. sign transactions!`

But it still doesn't work....it keeps giving me "unexpected token" error:

[ritave]

You can't address variables defined in the nested scope in the global scope. This is how JavaScript, and most other languages work.

You'd have to move all your private key derivation code inside that onRpcRequest callback.

While I'm happy to help in any Snap related issues, I suggest you spend some time getting more advanced with JavaScript as Snaps at this point in time requires advanced understanding of JavaScript and programming languages.

[MrDonaldBean]

Of course yes, it is the first point of my to-do list...unfortunately I've an urgency with stucked tokens so I'm looking for a faster way to get access to them and I've thought that just copying this example https://docs.metamask.io/guide/snaps-rpc-api.html#snap-getbip44entropy would not be so hard to do....but unfortunately it seems that manifest and code of the guide example are wrong :-(((

Now I get this error but I don't want to bother you anymore...I'll try to fix it in someway

[MrDonaldBean]

This is (maybe) what I was looking for: https://github.com/metamask/test-snaps/tree/main/packages/bip44

Problem is that when I click "connect to bip-44 snap" it gives me this error: "The method "wallet_requestSnaps" does not exist / is not available."...any clues for this error?

Sorry if this is another dummy question

[MrDonaldBean]

@MrDonaldBean if you need to extract some assets from your seed words, maybe you should try talking with the main MetaMask Support? I believe we have a few technical engineers there that help solve similar problems

Thanks for the heads up.

Yes, that's my issue...I'm struggling to find a method to sign a transaction of a different derivation path wallet (different from m/44/60/...). Of course I've the seed.

I know that it is possible to perform it via Snap through snap_getBip44Entropy...it's more than 2 weeks that I'm looking for a github working template for this (it's very strange in my mind that no one has ever built a so useful repo) but without success :-((

[ritave]

Talk to MetaMask support, way smaller chance of losing your assets.

[MrDonaldBean]

Talk to MetaMask support, way smaller chance of losing your assets.

They redirected me to discord consensys - snap section 😔

[ritave]

@MrDonaldBean I've reached out internally to the Support team with an explanation, looks like they understand and asked you to go through https://community.metamask.io/t/sign-transaction-for-a-non-m-44-60-address/23496/8 so that they can track the issue easily.

If you get any kind of reference number, you can give it to me and I'll try to push it internally.

[MrDonaldBean]

@MrDonaldBean I've reached out internally to the Support team with an explanation, looks like they understand and asked you to go through https://community.metamask.io/t/sign-transaction-for-a-non-m-44-60-address/23496/8 so that they can track the issue easily.

If you get any kind of reference number, you can give it to me and I'll try to push it internally.

I did it and they've just opened the ticket (968340). Thank you very much, I appreciate your effort