tricu

An interpreted language for exploring Tree Calculus
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published-bundle.js (1266B)

      1 import { decodeBundle, fetchBytes, sha256 } from './bundle.js';
      2 // Common authenticated package/source boundary, independent of the evaluator.
      3 export async function publishedBundle(hash, localId) {
      4     const base = new URL('../', import.meta.url);
      5     let source = null;
      6     if (localId !== undefined) {
      7         const catalogue = JSON.parse(new TextDecoder('utf-8', { fatal: true }).decode(await fetchBytes(new URL('catalogue.json', base), 64000)));
      8         if (!Array.isArray(catalogue))
      9             throw new Error('Invalid catalogue');
     10         const entry = catalogue.find((item) => !!item && typeof item === 'object' && item['id'] === localId);
     11         if (!entry || entry['hash'] !== hash)
     12             throw new Error('Invalid catalogue pin');
     13         if (typeof entry['source'] !== 'string' || entry['source'].length > 32000 || await sha256(new TextEncoder().encode(entry['source'])) !== entry['sourceSha256'])
     14             throw new Error('Catalogue source integrity failure');
     15         source = entry['source'];
     16     }
     17     const bytes = await fetchBytes(new URL(`/_arboricx/bundle/hash/${hash}`, base));
     18     if (await sha256(bytes) !== hash)
     19         throw new Error('Bundle SHA-256 mismatch');
     20     return { hash, bytes, bundle: decodeBundle(bytes), source };
     21 }