Return appropriate error code when not enough money for tx

src/wallet/wallet_rpc_server.cpp

@@ -2412,6 +2412,11 @@ namespace tools
       er.code = WALLET_RPC_ERROR_CODE_NOT_ENOUGH_MONEY;
       er.message = e.what();
     }
+    catch (const tools::error::not_enough_unlocked_money& e)
+    {
+      er.code = WALLET_RPC_ERROR_CODE_NOT_ENOUGH_UNLOCKED_MONEY;
+      er.message = e.what();
+    }
     catch (const tools::error::tx_not_possible& e)
     {
       er.code = WALLET_RPC_ERROR_CODE_TX_NOT_POSSIBLE;

src/wallet/wallet_rpc_server_error_codes.h

@@ -67,3 +67,4 @@
 #define WALLET_RPC_ERROR_CODE_BAD_MULTISIG_TX_DATA   -34
 #define WALLET_RPC_ERROR_CODE_MULTISIG_SIGNATURE     -35
 #define WALLET_RPC_ERROR_CODE_MULTISIG_SUBMISSION    -36
+#define WALLET_RPC_ERROR_CODE_NOT_ENOUGH_UNLOCKED_MONEY -37