memo support

contracts/ibc-reflect-send/src/contract.rs

@@ -157,6 +157,7 @@ pub fn handle_send_funds(
         to_address: remote_addr,
         amount,
         timeout: env.block.time.plus_seconds(PACKET_LIFETIME).into(),
+        memo: None,
     };
 
     let res = Response::new()

contracts/ibc-reflect-send/src/ibc.rs

@@ -410,12 +410,14 @@ mod tests {
                 to_address,
                 amount,
                 timeout,
+                memo,
             }) => {
                 assert_eq!(transfer_channel_id, channel_id.as_str());
                 assert_eq!(remote_addr, to_address.as_str());
                 assert_eq!(&coin(12344, "utrgd"), amount);
                 assert!(timeout.block().is_none());
                 assert!(timeout.timestamp().is_some());
+                assert_eq!(memo, None);
             }
             o => panic!("unexpected message: {o:?}"),
         }

contracts/ibc-reflect-send/tests/integration.rs

@@ -234,12 +234,14 @@ fn send_remote_funds() {
             to_address,
             amount,
             timeout,
+            memo,
         }) => {
             assert_eq!(transfer_channel_id, channel_id.as_str());
             assert_eq!(remote_addr, to_address.as_str());
             assert_eq!(&coin(12344, "utrgd"), amount);
             assert!(timeout.block().is_none());
             assert!(timeout.timestamp().is_some());
+            assert_eq!(memo, None);
         }
         o => panic!("unexpected message: {o:?}"),
     }

packages/std/src/ibc.rs

@@ -26,16 +26,19 @@ pub enum IbcMsg {
     /// and a matching module on the remote chain.
     /// We cannot select the port_id, this is whatever the local chain has bound the ibctransfer
     /// module to.
+    /// For each parameter see [reference declaration of packet](https://github.com/cosmos/ibc-go/blob/main/proto/ibc/applications/transfer/v2/packet.proto)
     Transfer {
         /// exisiting channel to send the tokens over
         channel_id: String,
         /// address on the remote chain to receive these tokens
         to_address: String,
         /// packet data only supports one coin
-        /// https://github.com/cosmos/cosmos-sdk/blob/v0.40.0/proto/ibc/applications/transfer/v1/transfer.proto#L11-L20
         amount: Coin,
         /// when packet times out, measured on remote chain
         timeout: IbcTimeout,
+        /// optional, usually JSON
+        #[serde(skip_serializing_if = "Option::is_none")]
+        memo: Option<Binary>,
     },
     /// Sends an IBC packet with given data over the existing channel.
     /// Data should be encoded in a format defined by the channel version,
@@ -783,6 +786,7 @@ mod tests {
             to_address: "my-special-addr".into(),
             amount: Coin::new(12345678, "uatom"),
             timeout: IbcTimeout::with_timestamp(Timestamp::from_nanos(1234567890)),
+            memo: None,
         };
         let encoded = to_string(&msg).unwrap();
         let expected = r#"{"transfer":{"channel_id":"channel-123","to_address":"my-special-addr","amount":{"denom":"uatom","amount":"12345678"},"timeout":{"block":null,"timestamp":"1234567890"}}}"#;