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readme.hints.md

@@ -802,4 +802,51 @@ class ProxyProtocolSocket {
 📋 **Consider full WrappedSocket for future major version**
 - Cleaner architecture
 - Better maintainability
-- But requires significant refactoring
+- But requires significant refactoring
+
+## WrappedSocket Implementation (PROXY Protocol Phase 1) - v19.5.19+
+
+The WrappedSocket class has been implemented as the foundation for PROXY protocol support:
+
+### Implementation Details
+
+1. **Design Approach**: Uses JavaScript Proxy to delegate all Socket methods/properties to the underlying socket while allowing override of specific properties (remoteAddress, remotePort).
+
+2. **Key Design Decisions**:
+   - NOT a Duplex stream - Initially tried this approach but it created infinite loops
+   - Simple wrapper using Proxy pattern for transparent delegation
+   - All sockets are wrapped, not just those from trusted proxies
+   - Trusted proxy detection happens after wrapping
+
+3. **Usage Pattern**:
+   ```typescript
+   // In RouteConnectionHandler.handleConnection()
+   const wrappedSocket = new WrappedSocket(socket);
+   // Pass wrappedSocket throughout the flow
+   
+   // When calling socket-utils functions, extract underlying socket:
+   const underlyingSocket = getUnderlyingSocket(socket);
+   setupBidirectionalForwarding(underlyingSocket, targetSocket, {...});
+   ```
+
+4. **Important Implementation Notes**:
+   - Socket utility functions (setupBidirectionalForwarding, cleanupSocket) expect raw net.Socket
+   - Always extract underlying socket before passing to these utilities using `getUnderlyingSocket()`
+   - WrappedSocket preserves all Socket functionality through Proxy delegation
+   - TypeScript typing handled via index signature: `[key: string]: any`
+
+5. **Files Modified**:
+   - `ts/core/models/wrapped-socket.ts` - The WrappedSocket implementation
+   - `ts/core/models/socket-types.ts` - Helper functions and type guards
+   - `ts/proxies/smart-proxy/route-connection-handler.ts` - Updated to wrap all incoming sockets
+   - `ts/proxies/smart-proxy/connection-manager.ts` - Updated to accept WrappedSocket
+   - `ts/proxies/smart-proxy/http-proxy-bridge.ts` - Updated to handle WrappedSocket
+
+6. **Test Coverage**:
+   - `test/test.wrapped-socket-forwarding.ts` - Verifies data forwarding through wrapped sockets
+
+### Next Steps for PROXY Protocol
+- Phase 2: Parse PROXY protocol header from trusted proxies
+- Phase 3: Update real client IP/port after parsing
+- Phase 4: Test with HAProxy and AWS ELB
+- Phase 5: Documentation and configuration