80 lines
2.2 KiB
TypeScript
80 lines
2.2 KiB
TypeScript
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import HDKey from 'hdkey';
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import { pubToAddress, toChecksumAddress } from 'ethereumjs-util';
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interface DeriveAddressesParams {
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chainCode: string;
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publicKey: string;
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index: number;
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numAddresses: number;
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}
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export function deriveAddressesFromPubKey(params: DeriveAddressesParams): string[] {
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const addresses = [];
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const hdkey = new HDKey();
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hdkey.chainCode = new Buffer(params.chainCode, 'hex');
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hdkey.publicKey = new Buffer(params.publicKey, 'hex');
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for (let i = params.index; i < params.index + params.numAddresses; i++) {
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const dkey = hdkey.derive(`m/${i}`);
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const address = (pubToAddress(dkey.publicKey, true) as Buffer).toString('hex');
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addresses.push(toChecksumAddress(address));
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}
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return addresses;
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}
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// Ledger throws a few types of errors
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interface U2FError {
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metaData: {
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type: string;
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code: number;
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};
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}
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interface ErrorWithId {
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id: string;
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message: string;
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name: string;
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stack: string;
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}
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type LedgerError = U2FError | ErrorWithId | Error | string;
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const isU2FError = (err: LedgerError): err is U2FError =>
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!!err && !!(err as U2FError).metaData;
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const isStringError = (err: LedgerError): err is string => typeof err === 'string';
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const isErrorWithId = (err: LedgerError): err is ErrorWithId =>
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err.hasOwnProperty('id') && err.hasOwnProperty('message');
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export function parseLedgerError(err: LedgerError): string {
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// https://developers.yubico.com/U2F/Libraries/Client_error_codes.html
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if (isU2FError(err)) {
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// Timeout
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if (err.metaData.code === 5) {
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return 'The request timed out';
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}
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return err.metaData.type;
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}
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if (isStringError(err)) {
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// Wrong app logged into
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if (err.includes('6804')) {
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return 'Wrong application selected on your ledger device. Make sure you’ve selected the ETH app.';
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}
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// Ledger locked
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if (err.includes('6801')) {
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return 'Your Ledger device is locked';
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}
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return err;
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}
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if (isErrorWithId(err)) {
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// Browser doesn't support U2F
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if (err.message.includes('U2F not supported')) {
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return 'Your browser doesn’t support Ledger. Please try updating it, or using a different one.';
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}
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}
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// Other
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return err.message || err.toString();
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}
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