@iden3/js-merkletree/dist/node/esm/lib/utils/bigint.js

javascript sparse merkle tree library

import { HASH_BYTES_LENGTH } from '../../constants';
export const bigint2Array = (bigNum, radix) => {
    return bigNum
        .toString(radix ? radix : 10)
        .split('')
        .map((n) => {
        return parseInt(n);
    });
};
export const bigIntToUINT8Array = (bigNum) => {
    const n256 = BigInt(256);
    const bytes = new Uint8Array(HASH_BYTES_LENGTH);
    let i = 0;
    while (bigNum > BigInt(0)) {
        bytes[HASH_BYTES_LENGTH - 1 - i] = Number(bigNum % n256);
        bigNum = bigNum / n256;
        i += 1;
    }
    return bytes;
};