[rpc] walletcreatefundedpsbt: allow inputs to be null

This is of neglible use here, but it allows new RPC methods to take outputs as their first argument and make inputs optional.

2 files changed, 9 insertions, 4 deletions

diff --git a/src/rpc/rawtransaction_util.cpp b/src/rpc/rawtransaction_util.cpp
index 1031716b4a..cfe4575090 100644
--- a/src/rpc/rawtransaction_util.cpp
+++ b/src/rpc/rawtransaction_util.cpp
@@ -21,10 +21,15 @@
 
 CMutableTransaction ConstructTransaction(const UniValue& inputs_in, const UniValue& outputs_in, const UniValue& locktime, bool rbf)
 {
-    if (inputs_in.isNull() || outputs_in.isNull())
-        throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, arguments 1 and 2 must be non-null");
+    if (outputs_in.isNull())
+        throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, output argument must be non-null");
+
+    UniValue inputs;
+    if (inputs_in.isNull())
+        inputs = UniValue::VARR;
+    else
+        inputs = inputs_in.get_array();
 
-    UniValue inputs = inputs_in.get_array();
     const bool outputs_is_obj = outputs_in.isObject();
     UniValue outputs = outputs_is_obj ? outputs_in.get_obj() : outputs_in.get_array();
 
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 891d650ad3..c00f5b1b70 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -3997,7 +3997,7 @@ UniValue walletcreatefundedpsbt(const JSONRPCRequest& request)
                 "\nCreates and funds a transaction in the Partially Signed Transaction format.\n"
                 "Implements the Creator and Updater roles.\n",
                 {
-                    {"inputs", RPCArg::Type::ARR, RPCArg::Optional::NO, "The inputs. Leave empty to add inputs automatically. See add_inputs option.",
+                    {"inputs", RPCArg::Type::ARR, RPCArg::Optional::OMITTED_NAMED_ARG, "Leave empty to add inputs automatically. See add_inputs option.",
                         {
                             {"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "",
                                 {