js-databox/esm/utils/common.js

databox & metabox

import { Buffer } from "buffer";
import { toHexString } from "@dfinity/candid";
import { getCrc32 } from "@dfinity/principal/lib/cjs/utils/getCrc";
import * as SHA1 from "@dfinity/principal/lib/cjs/utils/sha224";
export const ArrayToHexString = (byteArray) => {
    return Array.from(byteArray, function (byte) {
        return ("0" + (byte & 0xff).toString(16)).slice(-2);
    }).join("");
};
export const getUint8ArrayFromHex = (str) => {
    return Uint8Array.from(Buffer.from(str, "hex"));
};
export const getToAccountIdentifier = (principal, s) => {
    const padding = new Buffer("\x0Aaccount-id");
    const array = new Uint8Array([
        ...padding,
        ...principal.toUint8Array(),
        ...getPrincipalSubAccountArray(s),
    ]);
    const hash = SHA1.sha224(array);
    const checksum = to32bits(getCrc32(hash));
    const array2 = new Uint8Array([...checksum, ...hash]);
    return toHexString(array2);
};
const getPrincipalSubAccountArray = (principal) => {
    const p = Array.from(principal.toUint8Array());
    let tmp = Array(1).fill(p.length).concat(p);
    while (tmp.length < 32)
        tmp.push(0);
    return tmp;
};
const to32bits = (num) => {
    let b = new ArrayBuffer(4);
    new DataView(b).setUint32(0, num);
    return Array.from(new Uint8Array(b));
};