@ecash/lib/src/hash.ts

Library for eCash transaction building

// Copyright (c) 2024 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

export interface Hasher {
    update: (data: Uint8Array) => void;
    finalize: () => Uint8Array;
    clone: () => Hasher;
    free: () => void;
}

type HasherClass = { new (): Hasher };

interface EcashLibHashes {
    sha256?: (data: Uint8Array) => Uint8Array;
    sha256d?: (data: Uint8Array) => Uint8Array;
    shaRmd160?: (data: Uint8Array) => Uint8Array;
    sha512?: (data: Uint8Array) => Uint8Array;
    Sha256H?: HasherClass;
    Sha512H?: HasherClass;
}

const HASHES: EcashLibHashes = {};

export function sha256(data: Uint8Array): Uint8Array {
    return HASHES.sha256!(data);
}
export function sha256d(data: Uint8Array): Uint8Array {
    return HASHES.sha256d!(data);
}
export function shaRmd160(data: Uint8Array): Uint8Array {
    return HASHES.shaRmd160!(data);
}
export function sha512(data: Uint8Array): Uint8Array {
    return HASHES.sha512!(data);
}
export function sha256Hasher(): Hasher {
    return new HASHES.Sha256H!();
}
export function sha512Hasher(): Hasher {
    return new HASHES.Sha512H!();
}

export function __setHashes(hashes: EcashLibHashes) {
    HASHES.sha256 = hashes.sha256;
    HASHES.sha256d = hashes.sha256d;
    HASHES.shaRmd160 = hashes.shaRmd160;
    HASHES.sha512 = hashes.sha512;
    HASHES.Sha256H = hashes.Sha256H;
    HASHES.Sha512H = hashes.Sha512H;
}