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+---
+title: "imToken production in-app browser login — Quick Fix"
+type: quick-fix
+date: 2026-06-06
+---
+
+# imToken production in-app browser login — Quick Fix
+
+## Bug
+
+`main` serves `ark-library.com`, while `terry-wallet-login` serves the staging site. imToken login worked on staging, but on `ark-library.com` the imToken deeplink could open the in-app browser without completing login.
+
+## Root Cause
+
+The production imToken in-app browser path depends on injected wallet provider behavior after the deeplink opens `ark-library.com`. Some imToken environments can expose a legacy provider shape (`window.web3.currentProvider`, `selectedAddress`, or `enable()`) or fail BNB-chain switching even though the wallet address is already available. The previous flow required the modern EIP-1193 path and chain switch to succeed, so login could silently fail before the frontend posted the wallet address to the backend.
+
+## Fix
+
+Made the injected wallet login path more tolerant for imToken/mobile in-app browser environments:
+
+- Detect legacy `window.web3.currentProvider` if `window.ethereum` is unavailable.
+- Accept `selectedAddress` when it is already exposed by the wallet.
+- Fall back to legacy `ethereum.enable()` if `eth_requestAccounts` fails.
+- Do not block wallet-address login if BNB-chain switching fails, because the backend login only needs the wallet address.
+
+### Files Modified
+
+- `src/wallet/injected.ts` — adds legacy provider/address fallbacks and makes BNB-chain switching non-blocking for injected wallet login.
+
+## Verification
+
+- `npx prettier --write src/wallet/injected.ts`
+- `npx tsc --noEmit`
+- `npm run format:check`
+- `npm test`
+- `VITE_API_URL="" VITE_API_PREFIX="/apnew" VITE_DISABLE_ADMIN="true" npm run build`
+
+## Notes
+
+The production fix was committed and pushed to `main` as `9c4b8a4 fix: support imToken in-app browser login`; Terry confirmed CI handles deploy for `ark-library.com`.