Change Insufficient Allowance message to High network fee

src/Managing.Web3Proxy/src/plugins/custom/gmx.ts

@@ -770,6 +770,34 @@ export const openGmxPositionImpl = async (
                 direction: direction
             });
 
+            // Check and handle token allowance for GMX contracts
+            console.log('🔐 Checking token allowances for position opening...');
+            await approveTokenForContract(
+                sdk,
+                "USDC", // Using USDC as collateral
+                collateralToken,
+                collateralAmount,
+                "OrderVault"
+            );
+
+            await approveTokenForContract(
+                sdk,
+                "USDC", // Using USDC as collateral
+                collateralToken,
+                collateralAmount,
+                "ExchangeRouter"
+            );
+
+            await approveTokenForContract(
+                sdk,
+                "USDC", // Using USDC as collateral
+                collateralToken,
+                collateralAmount,
+                "SyntheticsRouter"
+            );
+
+            console.log('✅ Token allowances verified, proceeding with position opening...');
+
             // Check gas fees before opening position
             console.log('⛽ Checking gas fees before opening position...');
             const estimatedGasFee = await estimatePositionGasFee(sdk);
@@ -881,6 +909,17 @@ export async function openGmxPosition(
             };
         }
         
+        // Handle approval-specific errors with better messaging
+        if (error instanceof Error && error.message.includes('Failed to handle token allowance')) {
+            reply.status(400);
+            return {
+                success: false,
+                error: error.message,
+                errorType: 'APPROVAL_FAILED',
+                suggestion: 'Token approval failed. Please ensure you have sufficient funds and try again, or manually approve the GMX contracts to spend your USDC tokens.'
+            };
+        }
+        
         return handleError(this, reply, error, 'gmx/open-position');
     }
 }