descriptor: check if `rawtr` has only one key.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp
index 9bcbe1ceef..953d6a7ec6 100644
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -1472,6 +1472,10 @@ std::unique_ptr<DescriptorImpl> ParseScript(uint32_t& key_exp_index, Span<const
     }
     if (ctx == ParseScriptContext::TOP && Func("rawtr", expr)) {
         auto arg = Expr(expr);
+        if (expr.size()) {
+            error = strprintf("rawtr(): only one key expected.");
+            return nullptr;
+        }
         auto output_key = ParsePubkey(key_exp_index, arg, ParseScriptContext::P2TR, out, error);
         if (!output_key) return nullptr;
         ++key_exp_index;