Fix: detect multisig type from input cells in deploy

src/subcommands/deploy/tx_builder.rs

@@ -80,6 +80,25 @@ pub fn build_tx<T: ChangeInfo>(
         .filter_map(|info| info.build_cell_output(lock_script, first_cell_input))
         .unzip();
 
+    // Create tx_dep_provider first, so we can use it to inspect input cells
+    let header_dep_resolver = DefaultHeaderDepResolver::new(ckb_rpc);
+    let tx_dep_provider = {
+        let inner = DefaultTransactionDependencyProvider::new(ckb_rpc, 0);
+        let mut offchain = OffchainTransactionDependencyProvider::default();
+        if let Some(pending_tx) = pending_tx {
+            let tx_view = pending_tx.into_view();
+            let tx_hash: H256 = tx_view.hash().unpack();
+            offchain.txs.insert(tx_hash.clone(), tx_view.clone());
+            for (output_idx, (output, output_data)) in tx_view.outputs_with_data_iter().enumerate()
+            {
+                offchain
+                    .cells
+                    .insert((tx_hash.clone(), output_idx as u32), (output, output_data));
+            }
+        }
+        TxDepProviderWrapper { inner, offchain }
+    };
+
     let mut unlockers = HashMap::new();
     let signer = DummySigner {
         args: vec![from_address.payload().args()],
@@ -92,49 +111,43 @@ pub fn build_tx<T: ChangeInfo>(
     );
 
     let mut cell_deps = vec![genesis_info.sighash_dep()];
+
+    // Detect multisig script types from input cells and add cell_deps/unlockers
+    // In upgrade scenarios, we need to check the actual input cell locks, not the deployment config
     if let Some(cfg) = multisig_config {
-        let multisig_script =
-            MultisigScript::try_from(cfg.lock_code_hash()).unwrap_or_else(|_err| {
-                panic!(
-                    "Failed to get multisig script from {}",
-                    cfg.lock_code_hash(),
-                )
-            });
-
-        cell_deps.push(genesis_info.multisig_dep(multisig_script));
-
-        let multisig_signer = SecpMultisigScriptSigner::new(Box::new(signer), cfg.clone());
-        let multisig_unlocker = SecpMultisigUnlocker::new(multisig_signer);
-        let multisig_script_id = multisig_script.script_id();
-        unlockers.insert(
-            multisig_script_id,
-            Box::new(multisig_unlocker) as Box<dyn ScriptUnlocker>,
-        );
+        for input in inputs.iter() {
+            let out_point = input.previous_output();
+            let cell_output = tx_dep_provider.get_cell(&out_point)?;
+            let lock_script_id = ScriptId::from(&cell_output.lock());
+
+            // Check if this is a multisig lock and we haven't added it yet
+            let multisig_script = if lock_script_id == MultisigScript::Legacy.script_id() {
+                Some(MultisigScript::Legacy)
+            } else if lock_script_id == MultisigScript::V2.script_id() {
+                Some(MultisigScript::V2)
+            } else {
+                None
+            };
+
+            // Add cell_dep and unlocker if this is a new multisig type
+            if let Some(multisig_script) = multisig_script {
+                unlockers.entry(lock_script_id).or_insert_with(|| {
+                    cell_deps.push(genesis_info.multisig_dep(multisig_script));
+
+                    let multisig_signer =
+                        SecpMultisigScriptSigner::new(Box::new(signer.clone()), cfg.clone());
+                    let multisig_unlocker = SecpMultisigUnlocker::new(multisig_signer);
+                    Box::new(multisig_unlocker) as Box<dyn ScriptUnlocker>
+                });
+            }
+        }
     }
 
     let placeholder_witness = packed::WitnessArgs::new_builder()
         .lock(Some(Bytes::from(vec![0u8; 65])).pack())
         .build();
     let balancer = CapacityBalancer::new_simple(from_script, placeholder_witness, fee_rate);
 
-    let header_dep_resolver = DefaultHeaderDepResolver::new(ckb_rpc);
-    let tx_dep_provider = {
-        let inner = DefaultTransactionDependencyProvider::new(ckb_rpc, 0);
-        let mut offchain = OffchainTransactionDependencyProvider::default();
-        if let Some(pending_tx) = pending_tx {
-            let tx_view = pending_tx.into_view();
-            let tx_hash: H256 = tx_view.hash().unpack();
-            offchain.txs.insert(tx_hash.clone(), tx_view.clone());
-            for (output_idx, (output, output_data)) in tx_view.outputs_with_data_iter().enumerate()
-            {
-                offchain
-                    .cells
-                    .insert((tx_hash.clone(), output_idx as u32), (output, output_data));
-            }
-        }
-        TxDepProviderWrapper { inner, offchain }
-    };
-
     let base_tx = TransactionBuilder::default()
         .cell_deps(cell_deps)
         .inputs(inputs)