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metamask-extension/app/scripts/lib/seed-phrase-verifier.js

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import KeyringController from 'eth-keyring-controller';
import log from 'loglevel';
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const seedPhraseVerifier = {
/**
* Verifies if the seed words can restore the accounts.
*
* Key notes:
* - The seed words can recreate the primary keyring and the accounts belonging to it.
* - The created accounts in the primary keyring are always the same.
* - The keyring always creates the accounts in the same sequence.
*
* @param {Array} createdAccounts - The accounts to restore
* @param {string} seedWords - The seed words to verify
* @returns {Promise<void>} Promises undefined
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*/
async verifyAccounts(createdAccounts, seedWords) {
if (!createdAccounts || createdAccounts.length < 1) {
throw new Error('No created accounts defined.');
}
const keyringController = new KeyringController({});
const Keyring = keyringController.getKeyringClassForType('HD Key Tree');
const opts = {
mnemonic: seedWords,
numberOfAccounts: createdAccounts.length,
};
const keyring = new Keyring(opts);
const restoredAccounts = await keyring.getAccounts();
log.debug(`Created accounts: ${JSON.stringify(createdAccounts)}`);
log.debug(`Restored accounts: ${JSON.stringify(restoredAccounts)}`);
if (restoredAccounts.length !== createdAccounts.length) {
// this should not happen...
throw new Error('Wrong number of accounts');
}
for (let i = 0; i < restoredAccounts.length; i++) {
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if (
restoredAccounts[i].toLowerCase() !== createdAccounts[i].toLowerCase()
) {
throw new Error(
`Not identical accounts! Original: ${createdAccounts[i]}, Restored: ${restoredAccounts[i]}`,
);
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}
}
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},
};
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export default seedPhraseVerifier;