dino_landing_page/MOBILE_WALLET_FIXES.md

Mobile Wallet Signature Verification Fixes

Issue Description

The mobile wallet adapter was experiencing "signature verification failed, missing signature for public key" errors when trying to pay DINO coins. This is a common issue with mobile Solana wallets due to differences in how they handle transaction signing and verification.

Root Causes Identified

1. Missing Transaction Fields: Mobile wallets require specific transaction fields like lastValidBlockHeight
2. Incorrect Commitment Levels: Mobile wallets work better with 'confirmed' commitment vs 'finalized'
3. Missing Preflight Checks: Mobile wallets benefit from transaction simulation before sending
4. Insufficient Error Handling: Generic error messages didn't help debug mobile-specific issues
5. Transaction Validation: Missing validation for required transaction properties

Solutions Implemented

1. Enhanced Transaction Construction

• Added lastValidBlockHeight to transactions
• Set proper commitment levels for mobile devices
• Added transaction validation before sending

2. Mobile-Optimized Transaction Sending

• Created sendTransactionWithMobileOptimization utility function
• Added retry logic with exponential backoff
• Implemented proper error handling for mobile wallets

3. Enhanced Error Handling

• Mobile-specific error messages
• Better debugging information for mobile devices
• Specific handling for signature verification failures

4. Preflight Transaction Checks

• Added transaction simulation before sending
• Mobile-specific validation rules
• Graceful fallback for preflight failures

5. Additional Wallet Adapters

• Added support for more mobile-friendly wallets
• Better mobile wallet detection
• Improved wallet connection handling

Code Changes Made

app/page.tsx

• Updated transaction construction with mobile-optimized parameters
• Added mobile-specific validation and error handling
• Integrated mobile wallet utility functions

app/components/WalletProvider.tsx

• Added more wallet adapters for better mobile support
• Enhanced error handling for mobile wallets
• Added mobile-specific wallet configuration

app/utils/mobileWalletUtils.ts (New File)

• Mobile-optimized transaction sending function
• Mobile device detection utilities
• Transaction validation for mobile wallets

Testing Recommendations

1. Test on Multiple Mobile Devices

   • iOS Safari with Phantom wallet
   • Android Chrome with Solflare wallet
   • Different screen sizes and orientations

2. Test Different Network Conditions

   • Slow network connections
   • Intermittent connectivity
   • High latency scenarios

3. Test Wallet States

   • Fresh wallet connections
   • Reconnected wallets
   • Wallets with different token balances

Common Mobile Wallet Issues and Solutions

Issue: "Signature verification failed"

Solution: Ensure transaction has all required fields and proper commitment levels

Issue: "Missing signature for public key"

Solution: Validate transaction before sending and use mobile-optimized sending

Issue: "Transaction simulation failed"

Solution: Check wallet connection and ensure proper transaction construction

Issue: "User rejected transaction"

Solution: Provide clear error messages and retry options

Future Improvements

1. Wallet-Specific Optimizations

   • Phantom-specific transaction handling
   • Solflare-specific optimizations
   • Hardware wallet support

2. Better Mobile UX

   • Mobile-specific UI components
   • Touch-friendly interactions
   • Better mobile error display

3. Advanced Error Recovery

   • Automatic retry mechanisms
   • Transaction recovery options
   • Better user guidance

Monitoring and Debugging

The implementation includes enhanced logging for mobile devices:

• Device detection information
• Wallet connection status
• Transaction validation details
• Error context for debugging

Check browser console for detailed mobile wallet debugging information when issues occur.