feat: add new attributes in encoding context, update usv4 swap encoder and tests

src/encoding/models.rs

@@ -111,11 +111,17 @@ pub struct Transaction {
 /// * `receiver`: Address of the receiver of the out token after the swaps are completed.
 /// * `exact_out`: true if the solution is a buy order, false if it is a sell order.
 /// * `router_address`: Address of the router contract to be used for the swaps.
+/// * `group_token_in`: Token to be used as the input for the group swap.
+/// * `group_token_out`: Token to be used as the output for the group swap.
+/// * `amount_out_min`: Minimum amount of the output token to be received.
 #[derive(Clone, Debug)]
 pub struct EncodingContext {
     pub receiver: Bytes,
     pub exact_out: bool,
     pub router_address: Bytes,
+    pub group_token_in: Option<Bytes>,
+    pub group_token_out: Option<Bytes>,
+    pub amount_out_min: Option<BigUint>,
 }
 
 #[derive(Clone, PartialEq, Eq, Hash)]