Store contracts in struct

crates/solvers/src/domain/solver/dex/mod.rs

@@ -41,8 +41,8 @@ impl Dex {
             dex,
             simulator: infra::dex::Simulator::new(
                 &config.node_url,
-                config.settlement,
-                config.authenticator,
+                config.contracts.settlement,
+                config.contracts.authenticator,
             ),
             slippage: config.slippage,
             concurrent_requests: config.concurrent_requests,

crates/solvers/src/infra/config/dex/balancer/file.rs

@@ -40,7 +40,7 @@ pub async fn load(path: &Path) -> super::Config {
                 .vault
                 .map(eth::ContractAddress)
                 .unwrap_or(contracts.balancer_vault),
-            settlement: base.settlement,
+            settlement: base.contracts.settlement,
         },
         base,
     }

crates/solvers/src/infra/config/dex/file.rs

@@ -100,8 +100,10 @@ pub async fn load<T: DeserializeOwned>(path: &Path) -> (super::Config, T) {
 
     let config = super::Config {
         node_url: config.node_url,
-        settlement,
-        authenticator,
+        contracts: super::Contracts {
+            settlement,
+            authenticator,
+        },
         slippage: slippage::Limits::new(
             config.relative_slippage,
             config.absolute_slippage.map(eth::Ether),

crates/solvers/src/infra/config/dex/mod.rs

@@ -9,10 +9,14 @@ use {
     std::num::NonZeroUsize,
 };
 
-pub struct Config {
-    pub node_url: reqwest::Url,
+pub struct Contracts {
     pub settlement: eth::ContractAddress,
     pub authenticator: eth::ContractAddress,
+}
+
+pub struct Config {
+    pub node_url: reqwest::Url,
+    pub contracts: Contracts,
     pub slippage: slippage::Limits,
     pub concurrent_requests: NonZeroUsize,
     pub smallest_partial_fill: eth::Ether,