import { createHash } from 'node:crypto';
import { readFile, stat } from '../backends/files.js';

export async function sha256(path: string): Promise<string> {
    const buf = await readFile(path);
    return createHash('sha256').update(buf).digest('hex');
}

export async function sha256OrNull(path: string): Promise<string | null> {
    try {
        await stat(path);
    } catch {
        return null;
    }
    return sha256(path);
}

export function sha256Buffer(buf: Buffer): string {
    return createHash('sha256').update(buf).digest('hex');
}