wip

Author: Hallmane

src/wallet.rs

@@ -2556,15 +2556,36 @@ pub fn encode_usdc_paymaster_data(
     let mut data = Vec::new();
     data.extend_from_slice(paymaster.as_slice());
 
-    // Add paymaster-specific data
-    // For Circle's paymaster on Base, we only include the token address
-    // The paymaster will calculate the gas cost internally
+    // Add paymaster-specific data for Circle's TokenPaymaster v0.8
+    // Format: encodePacked([uint8, address, uint256, bytes])
+    // - uint8: mode (0 for permit mode)
+    // - address: USDC token address
+    // - uint256: permit amount
+    // - bytes: permit signature (empty for now, needs EIP-2612 implementation)
+    
+    // Mode byte (0 for permit mode)
+    data.push(0u8);
 
     // Token address (USDC)
     data.extend_from_slice(token_address.as_slice());
 
-    // Note: Circle's paymaster may expect additional data, but based on
-    // the error we're getting, let's try with just the token address
-
+    // Permit amount - use a reasonable amount for gas payment (10 USDC worth)
+    let permit_amount = U256::from(10_000_000u64); // 10 USDC (6 decimals)
+    data.extend_from_slice(&permit_amount.to_be_bytes::<32>());
+    
+    // TODO: Implement EIP-2612 permit signature
+    // For now, we'll try with an empty signature to see if that changes the error
+    // In production, this would need to be a valid permit signature allowing
+    // the paymaster to spend USDC on behalf of the TBA
+    
+    // Note: The permit signature would typically be generated by signing:
+    // - owner: TBA address
+    // - spender: paymaster address  
+    // - value: permit_amount
+    // - nonce: current permit nonce from USDC contract
+    // - deadline: future timestamp
+    
+    // For testing, let's try without the signature first to see if we get a different error
+    
     data
 }