spb/admin-ka

1export function modPow(b, e, m) {2    let r = 1n;3    b = b % m;4    while (e > 0n) {5        if ((e & 1n) === 1n) {6            r = (r * b) % m;7        }8        e = e >> 1n;9        b = (b * b) % m;10    }11    return r;12}1314export function bigIntToU8Array(bigint, padLength=0) {15    let hex = bigint.toString(16);16    if (padLength === 0) {17        padLength = Math.ceil(hex.length / 2);18    }19    hex = hex.padStart(padLength * 2, '0');20    const length = hex.length / 2;21    const arr = new Uint8Array(length);22    for (let i = 0; i < length; i++) {23        arr[i] = parseInt(hex.slice(i * 2, i * 2 + 2), 16);24    }25    return arr;26}2728export function u8ArrayToBigInt(arr) {29    let hex = '0x';30    for (let i = 0; i < arr.length; i++) {31        hex += arr[i].toString(16).padStart(2, '0');32    }33    return BigInt(hex);34}35