@nervosnetwork/ckb-sdk-utils/lib-esm/convertors/index.js

Utils module of @nervosnetwork/ckb-sdk-core

import { assertToBeHexStringOrBigint, assertToBeHexString } from '../validators.js';
import { HexStringWithout0xException } from '../exceptions/index.js';
export const toUint16Le = (uint16) => {
    assertToBeHexStringOrBigint(uint16);
    const dv = new DataView(new ArrayBuffer(2));
    dv.setUint16(0, Number(uint16), true);
    return `0x${dv.getUint16(0, false).toString(16).padStart(4, '0')}`;
};
export const toUint32Le = (uint32) => {
    assertToBeHexStringOrBigint(uint32);
    const dv = new DataView(new ArrayBuffer(4));
    dv.setUint32(0, Number(uint32), true);
    return `0x${dv.getUint32(0, false).toString(16).padStart(8, '0')}`;
};
export const toUint64Le = (uint64) => {
    assertToBeHexStringOrBigint(uint64);
    const val = (typeof uint64 === 'bigint' ? uint64.toString(16) : uint64.slice(2)).padStart(16, '0');
    const viewRight = toUint32Le(`0x${val.slice(0, 8)}`).slice(2);
    const viewLeft = toUint32Le(`0x${val.slice(8)}`).slice(2);
    return `0x${viewLeft}${viewRight}`;
};
export const hexToBytes = (rawhex) => {
    if (rawhex === '')
        return new Uint8Array();
    if (typeof rawhex === 'string' && !rawhex.startsWith('0x')) {
        throw new HexStringWithout0xException(rawhex);
    }
    let hex = rawhex.toString(16).replace(/^0x/i, '');
    hex = hex.length % 2 ? `0${hex}` : hex;
    const bytes = [];
    for (let c = 0; c < hex.length; c += 2) {
        bytes.push(parseInt(hex.substr(c, 2), 16));
    }
    return new Uint8Array(bytes);
};
export const toBigEndian = (leHex) => {
    assertToBeHexString(leHex);
    const bytes = hexToBytes(leHex);
    return `0x${bytes.reduceRight((pre, cur) => pre + cur.toString(16).padStart(2, '0'), '')}`;
};
export const bytesToHex = (bytes) => `0x${[...bytes].map(b => b.toString(16).padStart(2, '0')).join('')}`;
export default {
    toUint16Le,
    toUint32Le,
    toUint64Le,
    hexToBytes,
    bytesToHex,
    toBigEndian
};
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