Blake3 streaming + hashing

index.ts

import * as blake3 from 'blake3';

async function streamHash(stream:ReadableStream<Uint8Array>):Promise<string> {
    const hasher = blake3.createHash();
    const reader = stream.getReader();

    while (true) {
        const { done, value } = await reader.read();
        if (done) {
            break;
        }
        hasher.update(value);
    }

    return hasher.digest('hex');
}

// Example usage with a ReadableStream (e.g., from a fetch response):
async function hashFileFromUrl(url:string):Promise<string> {
    const response = await fetch(url);
    if (!response.body) {
        throw new Error("Response body is null");
    }
    return streamHash(response.body);
}