From 6b9f45e81bfe7472493b6df66133c929780ef2fb Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Wed, 27 Feb 2019 13:45:47 -0800
Subject: [PATCH] Support ranges arguments in RPC help

---
 src/rpc/util.cpp | 8 ++++++++
 src/rpc/util.h   | 1 +
 2 files changed, 9 insertions(+)

diff --git a/src/rpc/util.cpp b/src/rpc/util.cpp
index 7fb139f93c05f..40ac13318631c 100644
--- a/src/rpc/util.cpp
+++ b/src/rpc/util.cpp
@@ -200,6 +200,7 @@ struct Sections {
         case RPCArg::Type::STR:
         case RPCArg::Type::NUM:
         case RPCArg::Type::AMOUNT:
+        case RPCArg::Type::RANGE:
         case RPCArg::Type::BOOL: {
             if (outer_type == OuterType::NAMED_ARG) return; // Nothing more to do for non-recursive types on first recursion
             auto left = indent;
@@ -405,6 +406,10 @@ std::string RPCArg::ToDescriptionString() const
             ret += "numeric or string";
             break;
         }
+        case Type::RANGE: {
+            ret += "numeric or array";
+            break;
+        }
         case Type::BOOL: {
             ret += "boolean";
             break;
@@ -464,6 +469,8 @@ std::string RPCArg::ToStringObj(const bool oneline) const
         return res + "\"hex\"";
     case Type::NUM:
         return res + "n";
+    case Type::RANGE:
+        return res + "n or [n,n]";
     case Type::AMOUNT:
         return res + "amount";
     case Type::BOOL:
@@ -494,6 +501,7 @@ std::string RPCArg::ToString(const bool oneline) const
         return "\"" + m_name + "\"";
     }
     case Type::NUM:
+    case Type::RANGE:
     case Type::AMOUNT:
     case Type::BOOL: {
         return m_name;
diff --git a/src/rpc/util.h b/src/rpc/util.h
index f11998bafaa3b..f1bd2c89dfc50 100644
--- a/src/rpc/util.h
+++ b/src/rpc/util.h
@@ -51,6 +51,7 @@ struct RPCArg {
         OBJ_USER_KEYS, //!< Special type where the user must set the keys e.g. to define multiple addresses; as opposed to e.g. an options object where the keys are predefined
         AMOUNT,        //!< Special type representing a floating point amount (can be either NUM or STR)
         STR_HEX,       //!< Special type that is a STR with only hex chars
+        RANGE,         //!< Special type that is a NUM or [NUM,NUM]
     };
 
     enum class Optional {