Implement clearing the regular key, setting and clearing the no master

flag and enforcing the no master flag.

modules/ripple_data/protocol/ripple_SerializedObject.cpp

@@ -531,6 +531,11 @@ bool STObject::clearFlag (uint32 f)
     return true;
 }
 
+bool STObject::isFlag (uint32 f)
+{
+    return (getFlags () & f) == f;
+}
+
 uint32 STObject::getFlags (void) const
 {
     const STUInt32* t = dynamic_cast<const STUInt32*> (peekAtPField (sfFlags));

modules/ripple_data/protocol/ripple_SerializedObject.h

@@ -136,6 +136,7 @@ public:
 
     bool setFlag (uint32);
     bool clearFlag (uint32);
+    bool isFlag(uint32);
     uint32 getFlags () const;
 
     uint256 getHash (uint32 prefix) const;

modules/ripple_data/protocol/ripple_TER.cpp

@@ -46,6 +46,8 @@ bool transResultInfo (TER terCode, std::string& strToken, std::string& strHuman)
         {   tefNO_AUTH_REQUIRED,    "tefNO_AUTH_REQUIRED",      "Auth is not required."                                 },
         {   tefPAST_SEQ,            "tefPAST_SEQ",              "This sequence number has already past."                },
         {   tefWRONG_PRIOR,         "tefWRONG_PRIOR",           "This previous transaction does not match."             },
+        {   tefMASTER_DISABLED,     "tefMASTER_DISABLED",       "Master key is disabled."                               },
+        {   tefNO_REGULAR_KEY,      "tefNO_REGULAR_KEY",        "Regular key is not set."                               },
 
         {   telLOCAL_ERROR,         "telLOCAL_ERROR",           "Local failure."                                        },
         {   telBAD_DOMAIN,          "telBAD_DOMAIN",            "Domain too long."                                      },

modules/ripple_data/protocol/ripple_TER.h

@@ -94,6 +94,8 @@ enum TER    // aka TransactionEngineResult
     tefNO_AUTH_REQUIRED,    // Can't set auth if auth is not required.
     tefPAST_SEQ,
     tefWRONG_PRIOR,
+    tefMASTER_DISABLED,
+    tefNO_REGULAR_KEY,
 
     // -99 .. -1: R Retry (sequence too high, no funds for txn fee, originating account non-existent)
     // Causes:

modules/ripple_data/protocol/ripple_TxFormat.cpp

@@ -51,7 +51,7 @@ void TFInit ()
             ;
 
     DECLARE_TF (SetRegularKey, ttREGULAR_KEY_SET)
-            << SOElement (sfRegularKey,  SOE_REQUIRED)
+            << SOElement (sfRegularKey,  SOE_OPTIONAL)
             ;
 
     DECLARE_TF (Payment, ttPAYMENT)