Use the correct dust limit. Add test. Fix existing test

src/subcommand/wallet/transaction_builder.rs

@@ -212,7 +212,13 @@ impl TransactionBuilder {
   }
 
   fn select_outgoing(mut self) -> Result<Self> {
-    let dust_limit = self.recipient.script_pubkey().dust_value().to_sat();
+    let dust_limit = self
+      .unused_change_addresses
+      .last()
+      .unwrap()
+      .script_pubkey()
+      .dust_value()
+      .to_sat();
     for (inscribed_satpoint, inscription_id) in self.inscriptions.iter().rev() {
       if self.outgoing.outpoint == inscribed_satpoint.outpoint
         && self.outgoing.offset != inscribed_satpoint.offset

tests/wallet/send.rs

@@ -164,7 +164,7 @@ fn send_does_not_use_inscribed_sats_as_cardinal_utxos() {
 }
 
 #[test]
-fn do_not_accidentally_send_an_inscription() {
+fn do_not_send_within_dust_limit_of_an_inscription() {
   let rpc_server = test_bitcoincore_rpc::spawn();
   create_wallet(&rpc_server);
 
@@ -182,16 +182,38 @@ fn do_not_accidentally_send_an_inscription() {
   };
 
   CommandBuilder::new(format!(
-    "wallet send --fee-rate 1 bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4 {output}:55"
+    "wallet send --fee-rate 1 bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4 {output}:329"
   ))
   .rpc_server(&rpc_server)
   .expected_exit_code(1)
   .expected_stderr(format!(
-    "error: cannot send {output}:55 without also sending inscription {inscription} at {output}:0\n"
+    "error: cannot send {output}:329 without also sending inscription {inscription} at {output}:0\n"
   ))
   .run();
 }
 
+#[test]
+fn can_send_after_dust_limit_from_an_inscription() {
+  let rpc_server = test_bitcoincore_rpc::spawn();
+  create_wallet(&rpc_server);
+
+  let Inscribe { reveal, .. } = inscribe(&rpc_server);
+
+  rpc_server.mine_blocks(1);
+
+  let output = OutPoint {
+    txid: reveal,
+    vout: 0,
+  };
+
+  CommandBuilder::new(format!(
+    "wallet send --fee-rate 1 bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4 {output}:330"
+  ))
+  .rpc_server(&rpc_server)
+  .stdout_regex("[[:xdigit:]]{64}\n")
+  .run();
+}
+
 #[test]
 fn inscriptions_cannot_be_sent_by_satpoint() {
   let rpc_server = test_bitcoincore_rpc::spawn();