Add unmodified-but-with-checksum to getdescriptorinfo

2 files changed, 16 insertions, 0 deletions

diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp
index 95b949e9c2..a39cf635aa 100644
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -938,6 +938,14 @@ std::unique_ptr<Descriptor> Parse(const std::string& descriptor, FlatSigningProv
     return nullptr;
 }
 
+std::string GetDescriptorChecksum(const std::string& descriptor)
+{
+    std::string ret;
+    Span<const char> sp(descriptor.data(), descriptor.size());
+    if (!CheckChecksum(sp, false, &ret)) return "";
+    return ret;
+}
+
 std::unique_ptr<Descriptor> InferDescriptor(const CScript& script, const SigningProvider& provider)
 {
     return InferScript(script, ParseScriptContext::TOP, provider);
diff --git a/src/script/descriptor.h b/src/script/descriptor.h
index 29915c6c92..8c937d7fe5 100644
--- a/src/script/descriptor.h
+++ b/src/script/descriptor.h
@@ -81,6 +81,14 @@ struct Descriptor {
  */
 std::unique_ptr<Descriptor> Parse(const std::string& descriptor, FlatSigningProvider& out, bool require_checksum = false);
 
+/** Get the checksum for a descriptor.
+ *
+ * If it already has one, and it is correct, return the checksum in the input.
+ * If it already has one that is wrong, return "".
+ * If it does not already have one, return the checksum that would need to be added.
+ */
+std::string GetDescriptorChecksum(const std::string& descriptor);
+
 /** Find a descriptor for the specified script, using information from provider where possible.
  *
  * A non-ranged descriptor which only generates the specified script will be returned in all