@airgap/crypto/utils/derivation.js

The @airgap/crypto packages provides common crypto functionalities.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.incIndex = exports.splitDerivationPath = exports.createDerivationIndexFromString = exports.createDerivationIndexFromNumber = void 0;
var MASK_HARD_DERIVATION = 0x80000000;
var MASK_SOFT_DERIVATION = 0x00000000;
function createDerivationIndexFromNumber(value, isHardened) {
    var mask = isHardened ? MASK_HARD_DERIVATION : MASK_SOFT_DERIVATION;
    return {
        value: value,
        // tslint:disable-next-line: no-bitwise
        masked: parseInt((BigInt(mask) | BigInt(value)).toString(), 10),
        isHardened: isHardened
    };
}
exports.createDerivationIndexFromNumber = createDerivationIndexFromNumber;
function createDerivationIndexFromString(value) {
    var isHardened = ['h', "'"].includes(value.slice(-1));
    var index = parseInt(isHardened ? value.slice(0, -1) : value, 10);
    return createDerivationIndexFromNumber(index, isHardened);
}
exports.createDerivationIndexFromString = createDerivationIndexFromString;
function splitDerivationPath(path) {
    if (path.length === 0 || !path.startsWith('m/') || path === 'm/') {
        return [];
    }
    return path.slice(2).split('/').map(createDerivationIndexFromString);
}
exports.splitDerivationPath = splitDerivationPath;
function incIndex(current) {
    return createDerivationIndexFromNumber(current.value + 1, current.isHardened);
}
exports.incIndex = incIndex;
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