From f590653377d5ee18c05894a58d226b5d2531077b Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jgarzik@bitpay.com>
Date: Wed, 19 Jun 2013 11:53:02 -0400
Subject: [PATCH] RPC: add 'verifychain', to verify chain database at runtime

---
 src/bitcoinrpc.cpp    |  3 +++
 src/bitcoinrpc.h      |  1 +
 src/main.cpp          |  2 +-
 src/rpcblockchain.cpp | 16 ++++++++++++++++
 4 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index 285a88c8d..d939f5f7b 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -258,6 +258,7 @@ static const CRPCCommand vRPCCommands[] =
     { "gettxout",               &gettxout,               true,      false },
     { "lockunspent",            &lockunspent,            false,     false },
     { "listlockunspent",        &listlockunspent,        false,     false },
+    { "verifychain",            &verifychain,            true,      false },
 };
 
 CRPCTable::CRPCTable()
@@ -1198,6 +1199,8 @@ Array RPCConvertValues(const std::string &strMethod, const std::vector<std::stri
     if (strMethod == "lockunspent"            && n > 0) ConvertTo<bool>(params[0]);
     if (strMethod == "lockunspent"            && n > 1) ConvertTo<Array>(params[1]);
     if (strMethod == "importprivkey"          && n > 2) ConvertTo<bool>(params[2]);
+    if (strMethod == "verifychain"            && n > 0) ConvertTo<boost::int64_t>(params[0]);
+    if (strMethod == "verifychain"            && n > 1) ConvertTo<boost::int64_t>(params[1]);
 
     return params;
 }
diff --git a/src/bitcoinrpc.h b/src/bitcoinrpc.h
index 44c657f8d..aff759a5c 100644
--- a/src/bitcoinrpc.h
+++ b/src/bitcoinrpc.h
@@ -205,5 +205,6 @@ extern json_spirit::Value getblockhash(const json_spirit::Array& params, bool fH
 extern json_spirit::Value getblock(const json_spirit::Array& params, bool fHelp);
 extern json_spirit::Value gettxoutsetinfo(const json_spirit::Array& params, bool fHelp);
 extern json_spirit::Value gettxout(const json_spirit::Array& params, bool fHelp);
+extern json_spirit::Value verifychain(const json_spirit::Array& params, bool fHelp);
 
 #endif
diff --git a/src/main.cpp b/src/main.cpp
index 58c0c9363..4f29f7711 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2622,7 +2622,7 @@ bool VerifyDB(int nCheckLevel, int nCheckDepth)
         return true;
 
     // Verify blocks in the best chain
-    if (nCheckDepth == 0)
+    if (nCheckDepth <= 0)
         nCheckDepth = 1000000000; // suffices until the year 19000
     if (nCheckDepth > nBestHeight)
         nCheckDepth = nBestHeight;
diff --git a/src/rpcblockchain.cpp b/src/rpcblockchain.cpp
index a0ddc4d9e..6b2ef8315 100644
--- a/src/rpcblockchain.cpp
+++ b/src/rpcblockchain.cpp
@@ -243,4 +243,20 @@ Value gettxout(const Array& params, bool fHelp)
     return ret;
 }
 
+Value verifychain(const Array& params, bool fHelp)
+{
+    if (fHelp || params.size() > 2)
+        throw runtime_error(
+            "verifychain [check level] [num blocks]\n"
+            "Verifies blockchain database.");
+
+    int nCheckLevel = GetArg("-checklevel", 3);
+    int nCheckDepth = GetArg("-checkblocks", 288);
+    if (params.size() > 0)
+        nCheckLevel = params[0].get_int();
+    if (params.size() > 1)
+        nCheckDepth = params[1].get_int();
+
+    return VerifyDB(nCheckLevel, nCheckDepth);
+}