Generate Agoric address from BIP-39 mnemonic seed

[thangld322]

How can I convert a 24-word BIP-39 mnemonic seed to an Agoric address with programing?
I know I can get the address by importing the seed to an Agoric wallet like Keplr. But how can I do it by coding?

[dckc]

briefly... most of the answer is in #5830
but rather than DirectSecp256k1Wallet.fromKey() use new DirectSecp256k1HdWallet(mnemonic: EnglishMnemonic, ...)

[dckc]

Perhaps add coinType: 564 in options?

    bip44: {
      coinType: 564,
    },
    bech32Config: Bech32Address.defaultBech32Config("agoric"),

https://github.com/chainapsis/keplr-wallet/blob/c75e0b2d721879dcaaba8035fa43c00934be2d8b/packages/extension/src/config.ts#L1234-L1237

[thangld322]

const wallet = await DirectSecp256k1HdWallet.fromMnemonic(mnemonic, {prefix:"agoric", coinType: 564});

Looks like coinType is not an option for this function. The output is still the same.

[dckc]

oh... coinType is part of hdPaths. I have this code lying around...

import { stringToPath } from '@cosmjs/crypto';

const hdPath = (coinType = 118, account = 0) =>
  stringToPath(`m/44'/${coinType}'/${account}'/0/0`);

see also: https://github.com/cosmos/cosmjs/blob/33271bc51c/packages/proto-signing/src/directsecp256k1hdwallet.ts#L116

[thangld322]

Works like a champ! Thank you so much!

[dckc]

Nice work assembling several clues into a working solution!

If you could share the whole thing assembled, that would be great.

[dckc]

for reference, I see this was also asked in https://community.agoric.com/t/convert-bip-39-mnemonic-seed-to-agoric-address/190/1