move error closer to Result it takes part in

coverage_point_calculator/src/lib.rs

@@ -69,6 +69,11 @@ pub mod speedtest;
 
 pub type Result<T = ()> = std::result::Result<T, Error>;
 
+#[derive(thiserror::Error, Debug)]
+pub enum Error {
+    #[error("signal level {0:?} not allowed for {1:?}")]
+    InvalidSignalLevel(SignalLevel, RadioType),
+}
 /// Necessary checks for calculating coverage points is done during [RewardableRadio::new].
 #[derive(Debug, Clone)]
 pub struct RewardableRadio {
@@ -112,12 +117,6 @@ pub struct CoveragePoints {
     pub boosted_hex_eligibility: BoostedHexStatus,
 }
 
-#[derive(thiserror::Error, Debug)]
-pub enum Error {
-    #[error("signal level {0:?} not allowed for {1:?}")]
-    InvalidSignalLevel(SignalLevel, RadioType),
-}
-
 pub fn calculate_coverage_points(radio: RewardableRadio) -> CoveragePoints {
     let hex_coverage_points = radio.covered_hexes.calculated_coverage_points();
     let location_trust_multiplier = radio.location_trust_scores.multiplier;