From 3dcbb9b6b488f077d4ab7e4296dffbf3aea4a0fb Mon Sep 17 00:00:00 2001
From: Luke Dashjr <luke-jr+git@utopios.org>
Date: Thu, 30 Oct 2014 02:56:33 +0000
Subject: [PATCH] Abstract DecodeHexBlk and BIP22ValidationResult functions out
 of submitblock

---
 src/core_io.h     |  2 ++
 src/core_read.cpp | 18 ++++++++++++++++++
 src/rpcmining.cpp | 42 +++++++++++++++++++++---------------------
 3 files changed, 41 insertions(+), 21 deletions(-)

diff --git a/src/core_io.h b/src/core_io.h
index 94848f1c3..8777aa3b8 100644
--- a/src/core_io.h
+++ b/src/core_io.h
@@ -8,6 +8,7 @@
 #include <string>
 #include <vector>
 
+class CBlock;
 class CScript;
 class CTransaction;
 class uint256;
@@ -16,6 +17,7 @@ class UniValue;
 // core_read.cpp
 extern CScript ParseScript(std::string s);
 extern bool DecodeHexTx(CTransaction& tx, const std::string& strHexTx);
+extern bool DecodeHexBlk(CBlock&, const std::string& strHexBlk);
 extern uint256 ParseHashUV(const UniValue& v, const std::string& strName);
 extern std::vector<unsigned char> ParseHexUV(const UniValue& v, const std::string& strName);
 
diff --git a/src/core_read.cpp b/src/core_read.cpp
index d39bc9a78..42e2f8d20 100644
--- a/src/core_read.cpp
+++ b/src/core_read.cpp
@@ -4,6 +4,7 @@
 
 #include "core_io.h"
 
+#include "core/block.h"
 #include "core/transaction.h"
 #include "script/script.h"
 #include "serialize.h"
@@ -108,6 +109,23 @@ bool DecodeHexTx(CTransaction& tx, const std::string& strHexTx)
     return true;
 }
 
+bool DecodeHexBlk(CBlock& block, const std::string& strHexBlk)
+{
+    if (!IsHex(strHexBlk))
+        return false;
+
+    std::vector<unsigned char> blockData(ParseHex(strHexBlk));
+    CDataStream ssBlock(blockData, SER_NETWORK, PROTOCOL_VERSION);
+    try {
+        ssBlock >> block;
+    }
+    catch (const std::exception &) {
+        return false;
+    }
+
+    return true;
+}
+
 uint256 ParseHashUV(const UniValue& v, const string& strName)
 {
     string strHex;
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index 879a50411..577f37779 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -283,6 +283,25 @@ Value prioritisetransaction(const Array& params, bool fHelp)
 }
 
 
+// NOTE: Assumes a conclusive result; if result is inconclusive, it must be handled by caller
+static Value BIP22ValidationResult(const CValidationState& state)
+{
+    if (state.IsValid())
+        return Value::null;
+
+    std::string strRejectReason = state.GetRejectReason();
+    if (state.IsError())
+        throw JSONRPCError(RPC_VERIFY_ERROR, strRejectReason);
+    if (state.IsInvalid())
+    {
+        if (strRejectReason.empty())
+            return "rejected";
+        return strRejectReason;
+    }
+    // Should be impossible
+    return "valid?";
+}
+
 Value getblocktemplate(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() > 1)
@@ -566,15 +585,9 @@ Value submitblock(const Array& params, bool fHelp)
             + HelpExampleRpc("submitblock", "\"mydata\"")
         );
 
-    vector<unsigned char> blockData(ParseHex(params[0].get_str()));
-    CDataStream ssBlock(blockData, SER_NETWORK, PROTOCOL_VERSION);
     CBlock pblock;
-    try {
-        ssBlock >> pblock;
-    }
-    catch (const std::exception &) {
+    if (!DecodeHexBlk(pblock, params[0].get_str()))
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block decode failed");
-    }
 
     CValidationState state;
     submitblock_StateCatcher sc(pblock.GetHash());
@@ -587,20 +600,7 @@ Value submitblock(const Array& params, bool fHelp)
             return "inconclusive";
         state = sc.state;
     }
-    if (state.IsError())
-    {
-        std::string strRejectReason = state.GetRejectReason();
-        throw JSONRPCError(RPC_VERIFY_ERROR, strRejectReason);
-    }
-    if (state.IsInvalid())
-    {
-        std::string strRejectReason = state.GetRejectReason();
-        if (strRejectReason.empty())
-            return "rejected";
-        return strRejectReason;
-    }
-
-    return Value::null;
+    return BIP22ValidationResult(state);
 }
 
 Value estimatefee(const Array& params, bool fHelp)