@zondax/ledger-stacks/dist/helper.js

Node API for Stacks App (Ledger Nano S+, X, Stax, Flex and Apex)

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.serializePath = serializePath;
const HARDENED = 0x80000000;
const DEFAULT_DER_PATH_LEN = 6;
const IDENTITY_DER_PATH_LEN = 4; // m/888'/0'/<account>
function serializePath(path) {
    if (!path.startsWith('m')) {
        throw new Error('Path should start with "m" (e.g "m/44\'/5757\'/5\'/0/3")');
    }
    const pathArray = path.split('/');
    let allocSize = 0;
    if (pathArray.length === DEFAULT_DER_PATH_LEN || pathArray.length === IDENTITY_DER_PATH_LEN) {
        allocSize = (pathArray.length - 1) * 4;
    }
    else {
        throw new Error("Invalid path. (e.g \"m/44'/5757'/5'/0/3\" or \"m/888'/0'/<account>\")");
    }
    const buf = Buffer.alloc(allocSize);
    for (let i = 1; i < pathArray.length; i += 1) {
        let value = 0;
        let child = pathArray[i];
        if (child.endsWith("'")) {
            value += HARDENED;
            child = child.slice(0, -1);
        }
        const childNumber = Number(child);
        if (Number.isNaN(childNumber)) {
            throw new Error(`Invalid path : ${child} is not a number. (e.g "m/44'/461'/5'/0/3")`);
        }
        if (childNumber >= HARDENED) {
            throw new Error('Incorrect child value (bigger or equal to 0x80000000)');
        }
        value += childNumber;
        buf.writeUInt32LE(value, 4 * (i - 1));
    }
    return buf;
}
//# sourceMappingURL=helper.js.map