Add warnings field to createmultisig to warn about uncompressed keys

1 files changed, 11 insertions, 0 deletions

diff --git a/src/rpc/misc.cpp b/src/rpc/misc.cpp
index 2c05fc39fd..762f6665da 100644
--- a/src/rpc/misc.cpp
+++ b/src/rpc/misc.cpp
@@ -113,6 +113,10 @@ static RPCHelpMan createmultisig()
                         {RPCResult::Type::STR, "address", "The value of the new multisig address."},
                         {RPCResult::Type::STR_HEX, "redeemScript", "The string value of the hex-encoded redemption script."},
                         {RPCResult::Type::STR, "descriptor", "The descriptor for this multisig"},
+                        {RPCResult::Type::ARR, "warnings", /* optional */ true, "Any warnings resulting from the creation of this multisig",
+                        {
+                            {RPCResult::Type::STR, "", ""},
+                        }},
                     }
                 },
                 RPCExamples{
@@ -161,6 +165,13 @@ static RPCHelpMan createmultisig()
     result.pushKV("redeemScript", HexStr(inner));
     result.pushKV("descriptor", descriptor->ToString());
 
+    UniValue warnings(UniValue::VARR);
+    if (!request.params[2].isNull() && OutputTypeFromDestination(dest) != output_type) {
+        // Only warns if the user has explicitly chosen an address type we cannot generate
+        warnings.push_back("Unable to make chosen address type, please ensure no uncompressed public keys are present.");
+    }
+    if (warnings.size()) result.pushKV("warnings", warnings);
+
     return result;
 },
     };