tricu

An interpreted language for exploring Tree Calculus
Log | Files | Refs | README | LICENSE

published-bundle.ts (1323B)

      1 import { decodeBundle, fetchBytes, sha256, type BundleHash } from './bundle.js';
      2 // Common authenticated package/source boundary, independent of the evaluator.
      3 export async function publishedBundle(hash: BundleHash, localId?: string) {
      4   const base = new URL('../', import.meta.url);
      5   let source: string | null = null;
      6   if (localId !== undefined) {
      7     const catalogue: unknown = JSON.parse(new TextDecoder('utf-8', { fatal: true }).decode(await fetchBytes(new URL('catalogue.json', base), 64000)));
      8     if (!Array.isArray(catalogue)) throw new Error('Invalid catalogue');
      9     const entry = catalogue.find((item: unknown) => !!item && typeof item === 'object' && (item as Record<string, unknown>)['id'] === localId) as Record<string, unknown> | undefined;
     10     if (!entry || entry['hash'] !== hash) throw new Error('Invalid catalogue pin');
     11     if (typeof entry['source'] !== 'string' || entry['source'].length > 32000 || await sha256(new TextEncoder().encode(entry['source'])) !== entry['sourceSha256']) throw new Error('Catalogue source integrity failure');
     12     source = entry['source'];
     13   }
     14   const bytes = await fetchBytes(new URL(`/_arboricx/bundle/hash/${hash}`, base));
     15   if (await sha256(bytes) !== hash) throw new Error('Bundle SHA-256 mismatch');
     16   return { hash, bytes, bundle: decodeBundle(bytes), source };
     17 }