From a80df869a92c330fbad9695057720b11a18af901 Mon Sep 17 00:00:00 2001
From: Doan Luu Duc Tai <doan@luuduct.ai>
Date: Sat, 31 Oct 2026 13:08:08 -0500
Subject: Forbid Rust lints and enforce strict typed TypeScript linting

---
 crates/chat-crypto/browser/wasi.ts | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

(limited to 'crates/chat-crypto/browser/wasi.ts')

diff --git a/crates/chat-crypto/browser/wasi.ts b/crates/chat-crypto/browser/wasi.ts
index a037519..f2d9290 100644
--- a/crates/chat-crypto/browser/wasi.ts
+++ b/crates/chat-crypto/browser/wasi.ts
@@ -15,8 +15,12 @@
 
 // @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-3.0
 
+function isStart(value: WebAssembly.ExportValue | undefined): value is () => unknown {
+    return typeof value === 'function' && value.length === 0;
+}
+
 async function execute(bytes: ArrayBuffer, input: string): Promise<StackChat.Execution> {
-    let memory: WebAssembly.Memory | undefined;
+    const instanceState: { memory: WebAssembly.Memory | undefined } = { memory: undefined };
     let output = '';
     let errors = '';
     const stdoutDecoder = new TextDecoder('utf-8', { fatal: true });
@@ -26,15 +30,16 @@ async function execute(bytes: ArrayBuffer, input: string): Promise<StackChat.Exe
     let randomCalls = 0;
     let randomBytes = 0;
     const memoryBuffer = (): ArrayBuffer => {
-        if (!memory) throw new Error('WASI memory is unavailable');
+        const memory = instanceState.memory;
+        if (memory === undefined) throw new Error('WASI memory is unavailable');
         return memory.buffer;
     };
     const data = (): DataView => new DataView(memoryBuffer());
-    const put32 = (address: number, value: number) => data().setUint32(address, value, true);
-    const noEntries = (count: number, size: number) => { put32(count, 0); put32(size, 0); return 0; };
+    const put32 = (address: number, value: number): void => { data().setUint32(address, value, true); };
+    const noEntries = (count: number, size: number): number => { put32(count, 0); put32(size, 0); return 0; };
     class Exit extends Error {
         readonly code: number;
-        constructor(code: number) { super(`WASI exit ${code}`); this.code = code; }
+        constructor(code: number) { super(`WASI exit ${String(code)}`); this.code = code; }
     }
     const wasi: Record<string, WebAssembly.ImportValue> = {
         args_sizes_get: noEntries,
@@ -108,7 +113,7 @@ async function execute(bytes: ArrayBuffer, input: string): Promise<StackChat.Exe
         'path_filestat_get', 'path_filestat_set_times', 'path_readlink', 'path_unlink_file',
         'path_rename', 'path_create_directory', 'path_remove_directory', 'path_link', 'path_symlink',
         'sock_accept', 'sock_recv', 'sock_send', 'sock_shutdown', 'poll_oneoff',
-    ]) wasi[name] = () => 76;
+    ]) wasi[name] = (): number => 76;
     const module = await WebAssembly.compile(bytes);
     for (const entry of WebAssembly.Module.imports(module)) {
         if (entry.module !== 'wasi_snapshot_preview1' || typeof wasi[entry.name] !== 'function') {
@@ -118,17 +123,17 @@ async function execute(bytes: ArrayBuffer, input: string): Promise<StackChat.Exe
     const instance = await WebAssembly.instantiate(module, { wasi_snapshot_preview1: wasi });
     const exportedMemory = instance.exports['memory'];
     const start = instance.exports['_start'];
-    if (!(exportedMemory instanceof WebAssembly.Memory) || typeof start !== 'function') throw new Error('Invalid WASI exports');
-    memory = exportedMemory;
+    if (!(exportedMemory instanceof WebAssembly.Memory) || !isStart(start)) throw new Error('Invalid WASI exports');
+    instanceState.memory = exportedMemory;
     try { start(); }
-    catch (error) { if (!(error instanceof Exit) || error.code !== 0) throw new Error(`${error instanceof Error ? error.message : 'WASI execution failed'}: ${errors}`); }
+    catch (error) { if (!(error instanceof Exit) || error.code !== 0) throw new Error(`${error instanceof Error ? error.message : 'WASI execution failed'}: ${errors}`, { cause: error }); }
     output += stdoutDecoder.decode();
     errors += stderrDecoder.decode();
     stdin.fill(0);
     return { output, randomCalls, randomBytes };
 }
 
-async function runProbe(bytes: ArrayBuffer) {
+async function runProbe(bytes: ArrayBuffer): Promise<StackChat.Execution> {
     const result = await execute(bytes, '');
     if (!result.output.startsWith('PASS: backend=OpenSSL ') || result.randomCalls === 0) {
         throw new Error('OpenSSL probe did not pass');
@@ -146,6 +151,6 @@ async function runCommand(bytes: ArrayBuffer, request: StackChat.CryptoRequest):
     return response;
 }
 
-globalThis.stackChatWasi = Object.freeze({ runCommand, runProbe });
+Object.defineProperty(globalThis, 'stackChatWasi', { value: Object.freeze({ runCommand, runProbe }), writable: false, configurable: false });
 
 // @license-end
-- 
cgit v1.2.3