fix: Add RecoverableError

--- don't change below this line ---
ENG-4076 <#DTT#>

src/encoding/errors.rs

@@ -9,6 +9,9 @@ use thiserror::Error;
 /// Variants:
 /// - `InvalidInput`: Indicates that the encoding has failed due to bad input parameters.
 /// - `FatalError`: There is problem with the application setup.
+/// - `RecoverableError`: Indicates that the encoding has failed with a recoverable error. Retrying
+///   at a later time may succeed. It may have failed due to a temporary issue, such as a network
+///   problem.
 #[derive(Error, Debug)]
 #[allow(dead_code)]
 pub enum EncodingError {
@@ -16,6 +19,8 @@ pub enum EncodingError {
     InvalidInput(String),
     #[error("Fatal error: {0}")]
     FatalError(String),
+    #[error("Recoverable error: {0}")]
+    RecoverableError(String),
 }
 
 impl From<io::Error> for EncodingError {

src/encoding/evm/router_encoder.rs

@@ -1,4 +1,3 @@
-use alloy_sol_types::SolValue;
 use num_bigint::BigUint;
 
 use crate::encoding::{

src/encoding/evm/strategy_encoder/encoder.rs

@@ -1,7 +1,5 @@
 use alloy_primitives::Address;
 use alloy_sol_types::SolValue;
-use num_bigint::BigUint;
-use num_traits::Zero;
 
 use crate::encoding::{
     errors::EncodingError,

src/encoding/strategy_encoder.rs

@@ -1,7 +1,4 @@
-use crate::encoding::{
-    errors::EncodingError,
-    models::{ActionType, Solution},
-};
+use crate::encoding::{errors::EncodingError, models::Solution};
 
 #[allow(dead_code)]
 pub trait StrategyEncoder {