From 093635e9a8c750ecb8e5f93d321d94e5eb97e48f Mon Sep 17 00:00:00 2001
From: jl777 <jameslee777@yahoo.com>
Date: Wed, 30 Jan 2019 23:15:44 -1100
Subject: [PATCH] Initial validation skeleton

---
 src/cc/rewards.cpp |  2 +-
 src/cc/sudoku.cpp  | 33 ++++++++++++++++++++++++++++++++-
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/src/cc/rewards.cpp b/src/cc/rewards.cpp
index bd5a6d919..b9f4677be 100644
--- a/src/cc/rewards.cpp
+++ b/src/cc/rewards.cpp
@@ -203,7 +203,7 @@ bool RewardsValidate(struct CCcontract_info *cp,Eval* eval,const CTransaction &t
     else
     {
         txid = tx.GetHash();
-        if ( (funcid=  DecodeRewardsOpRet(txid,tx.vout[numvouts-1].scriptPubKey,sbits,fundingtxid)) != 0 )
+        if ( (funcid= DecodeRewardsOpRet(txid,tx.vout[numvouts-1].scriptPubKey,sbits,fundingtxid)) != 0 )
         {
             if ( eval->GetTxUnconfirmed(fundingtxid,fundingTx,hashBlock) == 0 )
                 return eval->Invalid("cant find fundingtxid");
diff --git a/src/cc/sudoku.cpp b/src/cc/sudoku.cpp
index 5968f59d9..9d52728a3 100644
--- a/src/cc/sudoku.cpp
+++ b/src/cc/sudoku.cpp
@@ -2909,5 +2909,36 @@ UniValue sudoku_solution(uint64_t txfee,struct CCcontract_info *cp,cJSON *params
 
 bool sudoku_validate(struct CCcontract_info *cp,int32_t height,Eval *eval,const CTransaction tx)
 {
-    return(true);
+    CScript scriptPubKey; std::vector<uint8_t> vopret; uint8_t *script,e,f,funcid; int32_t score,numvouts; char unsolved[82];
+    if ( (numvouts= tx.vout.size()) > 1 )
+    {
+        scriptPubKey = tx.vout[numvouts-1].scriptPubKey;
+        GetOpReturnData(scriptPubKey,vopret);
+        if ( vopret.size() > 2 )
+        {
+            script = (uint8_t *)vopret.data();
+            if ( script[0] == EVAL_SUDOKU )
+            {
+                switch ( script[1] )
+                {
+                    case 'G':
+                        if ( sudoku_genopreturndecode(unsolved,scriptPubKey) == 'G' )
+                        {
+                            if ( dupree_solver(&score,unsolved) != 1 || score*COIN != tx.vout[1].nValue )
+                            {
+                                fprintf(stderr,"ht.%d score.%d vs %.8f %s\n",height,score,(double)tx.vout[1].nValue/COIN,tx.GetHash().ToString());
+                            }
+                        }
+                        return(true);
+                    case 'S':
+                        fprintf(stderr,"SOLVED ht.%d %.8f %s\n",height,score,(double)tx.vout[0].nValue/COIN,tx.GetHash().ToString());
+                        return(true);
+                    default: return eval->Invalid("invalid funcid");
+                }
+            } else return eval->Invalid("invalid evalcode");
+            
+        }
+    }
+    return eval->Invalid("not enough vouts");
 }
+