Fix unbound outpoint server error (#2479)

src/index.rs

@@ -1128,7 +1128,7 @@ impl Index {
   }
 
   pub(crate) fn list(&self, outpoint: OutPoint) -> Result<Option<List>> {
-    if !self.index_sats {
+    if !self.index_sats || outpoint == unbound_outpoint() {
       return Ok(None);
     }
 

src/subcommand/server.rs

@@ -2575,7 +2575,7 @@ mod tests {
 
   #[test]
   fn unbound_output_receives_unbound_inscriptions() {
-    let server = TestServer::new_with_regtest();
+    let server = TestServer::new_with_regtest_with_index_sats();
 
     server.mine_blocks(1);
 
@@ -2611,6 +2611,17 @@ mod tests {
   <dd><a class=monospace href=/output/0000000000000000000000000000000000000000000000000000000000000000:0>0000000000000000000000000000000000000000000000000000000000000000:0</a></dd>.*"
       ),
     );
+
+    server.assert_response_regex(
+      "/output/0000000000000000000000000000000000000000000000000000000000000000:0",
+      StatusCode::OK,
+      ".*<h1>Output <span class=monospace>0000000000000000000000000000000000000000000000000000000000000000:0</span></h1>
+<dl>
+  <dt>inscriptions</dt>
+  <dd class=thumbnails>
+    <a href=/inscription/.*><iframe sandbox=allow-scripts scrolling=no loading=lazy src=/preview/.*></iframe></a>
+  </dd>.*",
+    );
   }
 
   #[test]

tests/wallet/outputs.rs

@@ -35,3 +35,22 @@ fn outputs_includes_locked_outputs() {
   assert_eq!(output[0].output, outpoint);
   assert_eq!(output[0].amount, amount);
 }
+
+#[test]
+fn outputs_includes_unbound_outputs() {
+  let rpc_server = test_bitcoincore_rpc::spawn();
+  create_wallet(&rpc_server);
+
+  let coinbase_tx = &rpc_server.mine_blocks_with_subsidy(1, 1_000_000)[0].txdata[0];
+  let outpoint = OutPoint::new(coinbase_tx.txid(), 0);
+  let amount = coinbase_tx.output[0].value;
+
+  rpc_server.lock(outpoint);
+
+  let output = CommandBuilder::new("wallet outputs")
+    .rpc_server(&rpc_server)
+    .run_and_deserialize_output::<Vec<Output>>();
+
+  assert_eq!(output[0].output, outpoint);
+  assert_eq!(output[0].amount, amount);
+}