fix: Add new to SwapEncoder trait

Add executor_address in SwapEncoderBuilder::new and not in the builder pattern

src/encoding/swap_encoder/builder.rs

@@ -6,33 +6,22 @@ use std::str::FromStr;
 
 pub struct SwapEncoderBuilder {
     protocol_system: String,
-    executor_address: Option<Address>,
+    executor_address: Address,
 }
 
 impl SwapEncoderBuilder {
-    pub fn new(protocol_system: &str) -> Self {
+    pub fn new(protocol_system: &str, executor_address: &str) -> Self {
         SwapEncoderBuilder {
             protocol_system: protocol_system.to_string(),
-            executor_address: None,
+            executor_address: Address::from_str(executor_address)
+                .expect(&format!("Invalid address: {}", executor_address)),
         }
     }
 
-    pub fn executor_address(mut self, address: &str) -> Self {
-        self.executor_address =
-            Some(Address::from_str(address).expect(&format!("Invalid address: {}", address)));
-        self
-    }
-
     pub fn build(self) -> Result<Box<dyn SwapEncoder>, String> {
-        let executor_address = self.executor_address.ok_or_else(|| {
-            format!(
-                "Executor address must be provided for protocol: {}",
-                self.protocol_system
-            )
-        })?;
         match self.protocol_system.as_str() {
-            "uniswap_v2" => Ok(Box::new(UniswapV2SwapEncoder::new(executor_address))),
-            "vm:balancer_v2" => Ok(Box::new(BalancerV2SwapEncoder::new(executor_address))),
+            "uniswap_v2" => Ok(Box::new(UniswapV2SwapEncoder::new(self.executor_address))),
+            "vm:balancer_v2" => Ok(Box::new(BalancerV2SwapEncoder::new(self.executor_address))),
             _ => Err(format!("Unknown protocol system: {}", self.protocol_system)),
         }
     }

src/encoding/swap_encoder/registry.rs

@@ -13,7 +13,7 @@ impl SwapEncoderRegistry {
         let mut encoders = HashMap::new();
 
         for (protocol, executor_address) in config.executors {
-            let builder = SwapEncoderBuilder::new(&protocol).executor_address(&executor_address);
+            let builder = SwapEncoderBuilder::new(&protocol, &executor_address);
             let encoder = builder.build().expect(&format!(
                 "Failed to build swap encoder for protocol: {}",
                 protocol

src/encoding/swap_encoder/swap_encoder.rs

@@ -7,6 +7,7 @@ use anyhow::Error;
 use std::str::FromStr;
 
 pub trait SwapEncoder: Sync + Send {
+    fn new(executor_address: Address) -> Self;
     fn encode_swap(&self, swap: Swap, encoding_context: EncodingContext) -> Result<Vec<u8>, Error>;
     fn executor_address(&self) -> Address;
 }
@@ -15,12 +16,11 @@ pub struct UniswapV2SwapEncoder {
     executor_address: Address,
 }
 
-impl UniswapV2SwapEncoder {
-    pub fn new(executor_address: Address) -> Self {
+impl UniswapV2SwapEncoder {}
+impl SwapEncoder for UniswapV2SwapEncoder {
+    fn new(executor_address: Address) -> Self {
         Self { executor_address }
     }
-}
-impl SwapEncoder for UniswapV2SwapEncoder {
     fn encode_swap(&self, swap: Swap, encoding_context: EncodingContext) -> Result<Vec<u8>, Error> {
         todo!()
     }
@@ -35,17 +35,14 @@ pub struct BalancerV2SwapEncoder {
     vault_address: Address,
 }
 
-impl BalancerV2SwapEncoder {
-    pub fn new(executor_address: Address) -> Self {
+impl SwapEncoder for BalancerV2SwapEncoder {
+    fn new(executor_address: Address) -> Self {
         Self {
             executor_address,
             vault_address: Address::from_str("0xba12222222228d8ba445958a75a0704d566bf2c8")
                 .expect("Invalid string for balancer vault address"),
         }
     }
-}
-
-impl SwapEncoder for BalancerV2SwapEncoder {
     fn encode_swap(&self, swap: Swap, encoding_context: EncodingContext) -> Result<Vec<u8>, Error> {
         let token_approvals_manager = ProtocolApprovalsManager::new();
         let runtime = tokio::runtime::Handle::try_current()