fix: error mapping for fee_provision in excess_balance hint (#2236)

* fix: error mapping for fee_provision in excess_balance hint

* Update CHANGELOG.md

---------

Co-authored-by: Julian Gonzalez Calderon <gonzalezcalderonjulian@gmail.com>

Author: radik878

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 #### Upcoming Changes
 
+* fix: error mapping for fee_provision in excess_balance hint [#2236](https://github.com/lambdaclass/cairo-vm/pull/2236)
+
 * fix: ArcTooBig parameter order in assert_le_felt. [#2234](https://github.com/lambdaclass/cairo-vm/pull/2234)
 
 * chore: Bump Rust toolchain to 1.89 [#2245](https://github.com/lambdaclass/cairo-vm/pull/2245)

vm/src/hint_processor/builtin_hint_processor/excess_balance.rs

@@ -376,10 +376,12 @@ pub fn excess_balance_hint(
         .checked_add(unrealized_funding_pnl)
         .and_then(|sum| sum.checked_add(token_assets_value_d))
         .ok_or_else(|| HintError::ExcessBalanceCalculationFailed("account_value".into()))?;
-    let fee_provision = fees
+    let fee = fees
         .get(&account)
-        .and_then(|fee| abs_balance_value.checked_mul(*fee))
         .ok_or_else(|| HintError::ExcessBalanceKeyError("fees".into()))?;
+    let fee_provision = abs_balance_value
+        .checked_mul(*fee)
+        .ok_or_else(|| HintError::ExcessBalanceCalculationFailed("fee_provision".into()))?;
     let margin_requirement = position_margin
         .checked_add(fee_provision)
         .ok_or_else(|| HintError::ExcessBalanceCalculationFailed("margin_requirements".into()))?;