tricu

An interpreted language for exploring Tree Calculus
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local-modules.js (1637B)

      1 import { BUNDLE_LIMIT, decodeBundle, sha256 } from './bundle.js';
      2 import { moduleHash, moduleIdentity } from './module-identity.js';
      3 export const LOCAL_MODULE_COUNT = 32, LOCAL_MODULE_BYTES = 64 * 1024 * 1024;
      4 export async function validateLocalModule(input) {
      5     if (!(input instanceof Uint8Array) || !input.byteLength || input.byteLength > BUNDLE_LIMIT)
      6         throw new Error('Local module must be at most 16 MiB');
      7     const bytes = new Uint8Array(input), bundle = decodeBundle(bytes);
      8     return { bytes, manifest: await moduleIdentity(bundle), hash: await sha256(bytes), names: bundle.exports.map(e => e.name) };
      9 }
     10 // Copy at the async boundary; verify supplied identities against these bytes.
     11 export function localModuleInputs(input = []) {
     12     if (!Array.isArray(input) || input.length > LOCAL_MODULE_COUNT)
     13         throw new Error('Local module count limit exceeded');
     14     let size = 0;
     15     const seen = new Set();
     16     return input.map((entry) => {
     17         if (!entry || typeof entry !== 'object')
     18             throw new Error('Invalid local module');
     19         const { manifest, bytes } = entry;
     20         moduleHash(manifest);
     21         if (seen.has(manifest))
     22             throw new Error('Duplicate local module manifest');
     23         seen.add(manifest);
     24         if (!(bytes instanceof Uint8Array) || !bytes.byteLength || bytes.byteLength > BUNDLE_LIMIT)
     25             throw new Error('Local module byte limit exceeded');
     26         size += bytes.byteLength;
     27         if (size > LOCAL_MODULE_BYTES)
     28             throw new Error('Local module collection exceeds 64 MiB');
     29         return { manifest, bytes: new Uint8Array(bytes) };
     30     });
     31 }