import { keccak_256 } from "@noble/hashes/sha3";

import { getBytes, hexlify } from "../utils/index.js";

import type { BytesLike } from "../utils/index.js";


let locked = false;

const _keccak256 = function(data: Uint8Array): Uint8Array {
    return keccak_256(data);
}

let __keccak256: (data: Uint8Array) => BytesLike = _keccak256;

export function keccak256(_data: BytesLike): string {
    const data = getBytes(_data, "data");
    return hexlify(__keccak256(data));
}
keccak256._ = _keccak256;
keccak256.lock = function(): void { locked = true; }
keccak256.register = function(func: (data: Uint8Array) => BytesLike) {
    if (locked) { throw new TypeError("keccak256 is locked"); }
    __keccak256 = func;
}
Object.freeze(keccak256);