diff --git a/fuzz/targets/send_msg.rs b/fuzz/targets/send_msg.rs
index d690a96..7d92bb9 100644
--- a/fuzz/targets/send_msg.rs
+++ b/fuzz/targets/send_msg.rs
@@ -3,7 +3,10 @@ use revault_coordinatord::{
     fuzz::builder::CoordinatordTestBuilder,
     processing::{process_request, MessageSender},
 };
-use revault_net::message::{RequestParams, ResponseResult};
+use revault_net::message::{
+    coordinator::{GetSigs, GetSpendTx},
+    RequestParams, ResponseResult,
+};
 use tokio::runtime::Runtime;
 
 fn main() {
@@ -26,14 +29,91 @@ fn main() {
                 _ => return,
             };
 
-            let res =
-                current_runtime.block_on(process_request(&builder.postgres_config, sender, msg.clone()));
-            match (msg, res) {
-                (RequestParams::CoordSig(_), Some(ResponseResult::Sig(_)))
-                | (RequestParams::GetSigs(_), Some(ResponseResult::Sigs(_)))
-                | (RequestParams::GetSpendTx(_), Some(ResponseResult::SpendTx(_)))
-                | (RequestParams::SetSpendTx(_), Some(ResponseResult::SetSpend(_))) => {}
-                _ => return,
+            let res = current_runtime.block_on(process_request(
+                &builder.postgres_config,
+                sender,
+                msg.clone(),
+            ));
+            match msg {
+                RequestParams::CoordSig(sigreq) => {
+                    match res {
+                        None => {}
+                        Some(resp) => {
+                            match resp {
+                                ResponseResult::Sig(sigres) => {
+                                    // If it was stored and accepted it must return it now.
+                                    if sigres.ack {
+                                        let id = sigreq.id;
+                                        let getsigs_req = RequestParams::GetSigs(GetSigs { id });
+                                        let res = current_runtime
+                                            .block_on(process_request(
+                                                &builder.postgres_config,
+                                                MessageSender::StakeHolder,
+                                                getsigs_req,
+                                            ))
+                                            .unwrap();
+                                        let sigs = match res {
+                                            ResponseResult::Sigs(sigs) => sigs,
+                                            _ => unreachable!("Must have answered with a sigs msg"),
+                                        };
+                                        assert_eq!(
+                                            sigs.signatures
+                                                .get(&sigreq.pubkey)
+                                                .unwrap()
+                                                .serialize_der()
+                                                .to_vec(),
+                                            sigreq.signature.serialize_der().to_vec()
+                                        );
+                                    }
+                                }
+                                _ => unreachable!("Must have responded with a sig_ack, or nothing"),
+                            }
+                        }
+                    }
+                }
+                RequestParams::GetSigs(_) => {}
+                RequestParams::GetSpendTx(_) => {}
+                RequestParams::SetSpendTx(setspendreq) => {
+                    match res {
+                        None => {}
+                        Some(resp) => {
+                            match resp {
+                                ResponseResult::SetSpend(setspendres) => {
+                                    // If it was stored and accepted it must return it now.
+                                    if setspendres.ack {
+                                        let deposit_outpoint = setspendreq.deposit_outpoints[0];
+                                        let getspend_req = RequestParams::GetSpendTx(GetSpendTx {
+                                            deposit_outpoint,
+                                        });
+                                        let res = current_runtime
+                                            .block_on(process_request(
+                                                &builder.postgres_config,
+                                                MessageSender::WatchTower,
+                                                getspend_req,
+                                            ))
+                                            .unwrap();
+                                        // NOTE: we must have *some* transaction, but the actual
+                                        // transaction we sent might have been replaced. Therefore
+                                        // we can't assert it's equal to the req's tx.
+                                        // TODO: we should probably have a DB per thread.
+                                        match res {
+                                            ResponseResult::SpendTx(spend_tx) => {
+                                                spend_tx.transaction.expect("We just stored it")
+                                            }
+                                            _ => unreachable!(
+                                                "Must have answered with a spend_tx msg"
+                                            ),
+                                        };
+                                    }
+                                }
+                                _ => unreachable!("Must have responded with a sig_ack, or nothing"),
+                            }
+                        }
+                    }
+                }
+                _ => {
+                    assert!(res.is_none(), "Message was unexpected, must not respond");
+                }
             };
         });
     }