import { bip32, hmac, sha512 } from '../deps.js';
import { digibyte, DGB_COIN_TYPE } from './network.js';
// BIP32 derives the master key as HMAC-SHA512(key, seed) with the key
// "Bitcoin seed". DigiByte's 2018-19 official mobile wallets (BreadWallet
// forks) used "DigiByte seed" instead, so the SAME 12 words give a
// completely different key tree — every address differs. A recovery that
// only tries the standard key never finds those coins.
// Ported from Digibyte.X/dgb-wallet @ 989a2696.
export const HMAC_BITCOIN_SEED = 'Bitcoin seed';
export const HMAC_DIGIBYTE_SEED = 'DigiByte seed';
export const PURPOSE_LABEL = {
    44: 'BIP44 legacy P2PKH',
    49: 'BIP49 P2SH-wrapped SegWit',
    84: 'BIP84 native SegWit v0',
    86: 'BIP86 Taproot (SegWit v1)',
};
export function rootFromSeed(seed, network = digibyte, hmacKey = HMAC_BITCOIN_SEED) {
    if (hmacKey === HMAC_BITCOIN_SEED) return bip32().fromSeed(seed, network);
    const I = hmac()(sha512(), new TextEncoder().encode(hmacKey), seed);
    return bip32().fromPrivateKey(Buffer.from(I.slice(0, 32)), Buffer.from(I.slice(32)), network);
}
// Standard account-level derivation: m/purpose'/coin'/account'.
// account defaults to 0 (the first account).
export function accountNode(root, purpose, account = 0) {
    return root.derivePath(`m/${purpose}'/${DGB_COIN_TYPE}'/${account}'`);
}
// Address-level derivation from an account node.
// change = 0 for external (receive) addresses, 1 for internal (change).
export function addressNode(account, change, index) {
    return account.derive(change).derive(index);
}
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