Coin uses shorter format for Debug

CHANGELOG.md

@@ -34,6 +34,8 @@ and this project adheres to
 - cosmwasm-vm: Add `.wasm` extension to stored wasm files ([#1686]).
 - cosmwasm-vm: Upgrade Wasmer to version 3.3.0.
 - cosmwasm-check: Update clap dependency to version 4 ([#1677])
+- cosmwasm-std: Coin uses shorter `Coin { 123 "ucosm" }` format for Debug
+  ([#1704])
 
 [#1511]: https://github.com/CosmWasm/cosmwasm/issues/1511
 [#1629]: https://github.com/CosmWasm/cosmwasm/pull/1629
@@ -42,6 +44,7 @@ and this project adheres to
 [#1667]: https://github.com/CosmWasm/cosmwasm/pull/1667
 [#1677]: https://github.com/CosmWasm/cosmwasm/pull/1677
 [#1686]: https://github.com/CosmWasm/cosmwasm/pull/1686
+[#1704]: https://github.com/CosmWasm/cosmwasm/pull/1704
 
 ### Deprecated
 

packages/std/src/coin.rs

@@ -4,7 +4,7 @@ use std::{fmt, str::FromStr};
 
 use crate::{errors::CoinFromStrError, math::Uint128};
 
-#[derive(Serialize, Deserialize, Clone, Default, Debug, PartialEq, Eq, JsonSchema)]
+#[derive(Serialize, Deserialize, Clone, Default, PartialEq, Eq, JsonSchema)]
 pub struct Coin {
     pub denom: String,
     pub amount: Uint128,
@@ -19,6 +19,12 @@ impl Coin {
     }
 }
 
+impl fmt::Debug for Coin {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Coin {{ {} \"{}\" }}", self.amount, self.denom)
+    }
+}
+
 impl FromStr for Coin {
     type Err = CoinFromStrError;
 
@@ -235,4 +241,10 @@ mod tests {
             "Invalid amount: number too large to fit in target type"
         );
     }
+
+    #[test]
+    fn debug_coin() {
+        let coin = Coin::new(123, "ucosm");
+        assert_eq!(format!("{:?}", coin), r#"Coin { 123 "ucosm" }"#);
+    }
 }