fix: Fix integration tests with transfer in method support

- For now, hardcode them to TRANSFER on the rust encoder side. This will be fixed in an upcoming PR.
- Remove the split swap simple route integration test - seemed overkill since simple routes are tested in many other integration tests, the original rust test named doesn't exist anymore, and simple routes should anyway be passing through the single endpoint.

src/encoding/evm/swap_encoder/swap_encoders.rs

@@ -22,6 +22,15 @@ use crate::encoding::{
     swap_encoder::SwapEncoder,
 };
 
+#[allow(dead_code)]
+#[repr(u8)]
+pub enum TransferType {
+    Transfer = 0,
+    TransferFrom = 1,
+    Permit2Transfer = 2,
+    None = 3,
+}
+
 /// Encodes a swap on a Uniswap V2 pool through the given executor address.
 ///
 /// # Fields
@@ -66,6 +75,7 @@ impl SwapEncoder for UniswapV2SwapEncoder {
             component_id,
             bytes_to_address(&encoding_context.receiver)?,
             zero_to_one,
+            (TransferType::Transfer as u8).to_be_bytes(),
         );
 
         Ok(args.abi_encode_packed())
@@ -128,6 +138,7 @@ impl SwapEncoder for UniswapV3SwapEncoder {
             bytes_to_address(&encoding_context.receiver)?,
             component_id,
             zero_to_one,
+            (TransferType::Transfer as u8).to_be_bytes(),
         );
 
         Ok(args.abi_encode_packed())
@@ -606,6 +617,8 @@ mod tests {
                 "0000000000000000000000000000000000000001",
                 // zero for one
                 "00",
+                // transfer type (transfer)
+                "00",
             ))
         );
     }
@@ -661,6 +674,8 @@ mod tests {
                 "88e6a0c2ddd26feeb64f039a2c41296fcb3f5640",
                 // zero for one
                 "00",
+                // transfer type (transfer)
+                "00",
             ))
         );
     }