feat: implement display trait for FeeRate type

Author: thunderbiscuit

bdk-ffi/src/bitcoin.rs

@@ -121,6 +121,7 @@ impl HashableOutPoint {
 /// This is an integer type representing fee rate in sat/kwu. It provides protection against mixing
 /// up the types as well as basic formatting features.
 #[derive(Clone, Debug, uniffi::Object)]
+#[uniffi::export(Display)]
 pub struct FeeRate(pub BdkFeeRate);
 
 #[uniffi::export]
@@ -157,6 +158,12 @@ impl FeeRate {
     }
 }
 
+impl Display for FeeRate {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(f, "{} sat/kwu", self.0)
+    }
+}
+
 impl_from_core_type!(BdkFeeRate, FeeRate);
 impl_into_core_type!(FeeRate, BdkFeeRate);