msggen: Add Wait method to managed API

Fixes ElementsProject#6792

Changelog-Added: Cln-RPC: Add `wait` system to cln-rpc and cln-grpc.

.msggen.json

@@ -334,6 +334,16 @@
             "complete": 1,
             "pending": 0
         },
+        "WaitIndexname": {
+            "created": 0,
+            "deleted": 2,
+            "updated": 1
+        },
+        "WaitSubsystem": {
+            "forwards": 1,
+            "invoices": 0,
+            "sendpays": 2
+        },
         "WaitanyinvoiceStatus": {
             "expired": 1,
             "paid": 0
@@ -1632,6 +1642,17 @@
             "UtxoPsbt.psbt": 1,
             "UtxoPsbt.reservations[]": 6
         },
+        "WaitRequest": {
+            "Wait.indexname": 2,
+            "Wait.nextvalue": 3,
+            "Wait.subsystem": 1
+        },
+        "WaitResponse": {
+            "Wait.created": 2,
+            "Wait.deleted": 4,
+            "Wait.subsystem": 1,
+            "Wait.updated": 3
+        },
         "WaitanyinvoicePaid_outpoint": {
             "WaitAnyInvoice.paid_outpoint.outnum": 2,
             "WaitAnyInvoice.paid_outpoint.txid": 1
@@ -5730,6 +5751,34 @@
             "added": "pre-v0.10.1",
             "deprecated": false
         },
+        "Wait": {
+            "added": "v23.08",
+            "deprecated": null
+        },
+        "Wait.created": {
+            "added": "pre-v0.10.1",
+            "deprecated": false
+        },
+        "Wait.deleted": {
+            "added": "pre-v0.10.1",
+            "deprecated": false
+        },
+        "Wait.indexname": {
+            "added": "pre-v0.10.1",
+            "deprecated": false
+        },
+        "Wait.nextvalue": {
+            "added": "pre-v0.10.1",
+            "deprecated": false
+        },
+        "Wait.subsystem": {
+            "added": "pre-v0.10.1",
+            "deprecated": false
+        },
+        "Wait.updated": {
+            "added": "pre-v0.10.1",
+            "deprecated": false
+        },
         "WaitAnyInvoice": {
             "added": "pre-v0.10.1",
             "deprecated": null

cln-grpc/src/server.rs

@@ -1818,6 +1818,38 @@ async fn wait_block_height(
 
 }
 
+async fn wait(
+    &self,
+    request: tonic::Request<pb::WaitRequest>,
+) -> Result<tonic::Response<pb::WaitResponse>, tonic::Status> {
+    let req = request.into_inner();
+    let req: requests::WaitRequest = req.into();
+    debug!("Client asked for wait");
+    trace!("wait request: {:?}", req);
+    let mut rpc = ClnRpc::new(&self.rpc_path)
+        .await
+        .map_err(|e| Status::new(Code::Internal, e.to_string()))?;
+    let result = rpc.call(Request::Wait(req))
+        .await
+        .map_err(|e| Status::new(
+           Code::Unknown,
+           format!("Error calling method Wait: {:?}", e)))?;
+    match result {
+        Response::Wait(r) => {
+           trace!("wait response: {:?}", r);
+           Ok(tonic::Response::new(r.into()))
+        },
+        r => Err(Status::new(
+            Code::Internal,
+            format!(
+                "Unexpected result {:?} to method call Wait",
+                r
+            )
+        )),
+    }
+
+}
+
 async fn stop(
     &self,
     request: tonic::Request<pb::StopRequest>,

contrib/msggen/msggen/utils/utils.py

@@ -105,6 +105,7 @@ def load_jsonrpc_service(schema_dir: str):
         "SignMessage",
         # "unreserveinputs",
         "WaitBlockHeight",
+        "Wait",
         # "ListConfigs",
         # "check",  # No point in mapping this one
         "Stop",