fix(rn): TON crypto deps, Buffer subarray polyfill, migrate on Vercel dev

- Add expo-crypto and react-native-fast-pbkdf2 for @ton/crypto-primitives on React Native.

- Patch Buffer.prototype.subarray so Hermes slices are real buffer Buffers with .copy() (fixes @ton/core BitBuilder).

- Remove SKIP_DB_MIGRATE from dev:vercel and start-expo-managed so local Vercel runs DB migrations.

Made-with: Cursor

Author: anriltine

package-lock.json

@@ -35,7 +35,7 @@
     "android": "expo start --android",
     "ios": "expo start --ios",
     "web": "expo start --web",
-    "dev:vercel": "cross-env SKIP_DB_MIGRATE=1 TS_NODE_PROJECT=api/tsconfig.json npx vercel dev --yes",
+    "dev:vercel": "cross-env TS_NODE_PROJECT=api/tsconfig.json npx vercel dev --yes",
     "lint": "expo lint",
     "draft": "npx eas-cli@latest workflow:run create-draft.yml",
     "development-builds": "npx eas-cli@latest workflow:run create-development-builds.yml",
@@ -148,6 +148,7 @@
     "expo": "~54.0.0",
     "expo-blur": "~15.0.8",
     "expo-constants": "~18.0.13",
+    "expo-crypto": "~15.0.8",
     "expo-font": "~14.0.11",
     "expo-haptics": "~15.0.8",
     "expo-image": "~3.0.11",
@@ -165,6 +166,7 @@
     "react": "19.1.0",
     "react-dom": "19.1.0",
     "react-native": "0.81.5",
+    "react-native-fast-pbkdf2": "^0.3.1",
     "react-native-gesture-handler": "~2.28.0",
     "react-native-reanimated": "~4.1.1",
     "react-native-safe-area-context": "~5.6.2",

package.json

@@ -1,9 +1,25 @@
 /**
  * Load before any module that touches Node's `Buffer` at evaluation time (e.g. @ton/*).
  * Browsers and Telegram WebView do not define `globalThis.Buffer`.
+ *
+ * Hermes / RN: `Buffer.prototype.subarray` can follow `Uint8Array` and return a slice
+ * without `.copy()`. `@ton/core` BitBuilder.buffer() does `this._buffer.subarray(...).copy(...)`.
+ * Always return a real `buffer` package Buffer from subarray.
  */
 import { Buffer } from "buffer";
 
-if (typeof globalThis !== "undefined" && !(globalThis as { Buffer?: unknown }).Buffer) {
-  (globalThis as { Buffer: typeof Buffer }).Buffer = Buffer;
+const BufferImpl = Buffer;
+const uint8Subarray = Uint8Array.prototype.subarray;
+
+if (typeof globalThis !== "undefined") {
+  (globalThis as { Buffer: typeof BufferImpl }).Buffer = BufferImpl;
+
+  BufferImpl.prototype.subarray = function subarrayPatched(
+    this: Buffer,
+    start?: number,
+    end?: number,
+  ): Buffer {
+    const slice = uint8Subarray.call(this, start, end);
+    return BufferImpl.from(slice);
+  };
 }

polyfills/buffer.ts

@@ -55,7 +55,6 @@ async function main() {
     stdio: "inherit",
     env: {
       ...process.env,
-      SKIP_DB_MIGRATE: "1",
       TS_NODE_PROJECT: "api/tsconfig.json",
     },
   });