@polkadot/util-crypto/key/DeriveJunction.js

A collection of useful crypto utilities for @polkadot

import { BN, bnToU8a, compactAddLength, hexToU8a, isBigInt, isBn, isHex, isNumber, isString, stringToU8a } from '@polkadot/util';
import { blake2AsU8a } from '../blake2/asU8a.js';
import { BN_LE_256_OPTS } from '../bn.js';
const RE_NUMBER = /^\d+$/;
const JUNCTION_ID_LEN = 32;
export class DeriveJunction {
    __internal__chainCode = new Uint8Array(32);
    __internal__isHard = false;
    static from(value) {
        const result = new DeriveJunction();
        const [code, isHard] = value.startsWith('/')
            ? [value.substring(1), true]
            : [value, false];
        result.soft(RE_NUMBER.test(code)
            ? new BN(code, 10)
            : code);
        return isHard
            ? result.harden()
            : result;
    }
    get chainCode() {
        return this.__internal__chainCode;
    }
    get isHard() {
        return this.__internal__isHard;
    }
    get isSoft() {
        return !this.__internal__isHard;
    }
    hard(value) {
        return this.soft(value).harden();
    }
    harden() {
        this.__internal__isHard = true;
        return this;
    }
    soft(value) {
        if (isNumber(value) || isBn(value) || isBigInt(value)) {
            return this.soft(bnToU8a(value, BN_LE_256_OPTS));
        }
        else if (isHex(value)) {
            return this.soft(hexToU8a(value));
        }
        else if (isString(value)) {
            return this.soft(compactAddLength(stringToU8a(value)));
        }
        else if (value.length > JUNCTION_ID_LEN) {
            return this.soft(blake2AsU8a(value));
        }
        this.__internal__chainCode.fill(0);
        this.__internal__chainCode.set(value, 0);
        return this;
    }
    soften() {
        this.__internal__isHard = false;
        return this;
    }
}