Use saturating_abs() to protect against overflow

Author: Rafał Chabowski

crates/fuel-gas-price-algorithm/src/utils.rs

@@ -18,24 +18,3 @@ pub(crate) fn cumulative_percentage_change(
     // `f64` over `u64::MAX` are cast to `u64::MAX`
     approx.ceil() as u64
 }
-
-pub(crate) fn safe_signed_abs(n: i128) -> i128 {
-    let n = if n == i128::MIN {
-        n.saturating_add(1)
-    } else {
-        n
-    };
-    debug_assert!(n != i128::MIN);
-    n.abs()
-}
-
-#[cfg(test)]
-mod tests {
-    use crate::utils::safe_signed_abs;
-
-    #[test]
-    fn safe_signed_abs_does_not_overflow_on_min_value() {
-        let abs = safe_signed_abs(i128::MIN);
-        assert_eq!(abs, i128::MAX);
-    }
-}

crates/fuel-gas-price-algorithm/src/v1.rs

@@ -4,10 +4,7 @@ use std::{
     ops::Div,
 };
 
-use crate::utils::{
-    cumulative_percentage_change,
-    safe_signed_abs,
-};
+use crate::utils::cumulative_percentage_change;
 
 #[cfg(test)]
 mod tests;
@@ -334,7 +331,7 @@ impl AlgorithmUpdaterV1 {
             .saturating_mul(upcast_percent)
             .saturating_div(100)
             .into();
-        let clamped_change = safe_signed_abs(pd_change).min(max_change);
+        let clamped_change = pd_change.saturating_abs().min(max_change);
         pd_change.signum().saturating_mul(clamped_change)
     }