Update

src/cc/CCtx.cpp

@@ -601,7 +601,6 @@ int64_t AddNormalinputs(CMutableTransaction &mtx,CPubKey mypk,int64_t total,int3
     return(0);
 }
 
-
 int64_t AddNormalinputs2(CMutableTransaction &mtx,int64_t total,int32_t maxinputs)
 {
     int32_t abovei,belowi,ind,vout,i,n = 0; int64_t sum,threshold,above,below; int64_t remains,nValue,totalinputs = 0; char coinaddr[64]; uint256 txid,hashBlock; CTransaction tx; struct CC_utxo *utxos,*up;

src/cc/gamescc.cpp

@@ -34,9 +34,49 @@ UniValue games_rawtxresult(UniValue &result,std::string rawtx,int32_t broadcastf
     return(result);
 }
 
-UniValue games_func0(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
+UniValue games_rng(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
 {
-    UniValue result(UniValue::VOBJ);
+    UniValue result(UniValue::VOBJ); int32_t i,n,playerid=0; uint16_t seeds[4]; uint64_t seed; bits256 hash;
+    if ( params != 0 && ((n= cJSON_GetArraySize(params)) == 2 || n == 3) )
+    {
+        hash = jbits256(jitem(params,0),0);
+        seed = jdouble(jitem(params,1),0);
+        if ( n == 3 )
+        {
+            playerid = juint(jitem(params,2),0);
+            if ( playerid >= 0x100 )
+            {
+                result.push_back(Pair("result","error"));
+                result.push_back(Pair("error","playerid too big"));
+                return(result);
+            }
+        }
+        if ( seed == 0 )
+        {
+            playerid++;
+            if ( playerid == 0x100 )
+            {
+                for (i=0; i<8; i++)
+                    hash.uints[i] ^= 0xffffffff;
+                playerid--;
+            }
+            for (i=0; i<8; i++)
+            {
+                if ( ((1 << i) & playerid) != 0 )
+                    seed ^= hash.uints[i];
+            }
+        }
+        else
+        {
+            for (i=0; i<4; i++)
+            {
+                seeds[i] = (seed >> (i*16));
+                seeds[i] = (seeds[i]*11109 + 13849);
+            }
+            seed = ((uint64_t)seeds[3] << 48) | ((uint64_t)seeds[2] << 24) | ((uint64_t)seeds[1] << 16) | seeds[0];
+        }
+        result.push_back(Pair("seed",seed));
+    }
     result.push_back(Pair("result","success"));
     result.push_back(Pair("message","just an example of an information returning rpc"));
     return(result);

src/cc/gamescc.h

@@ -7,18 +7,18 @@ std::string MYCCLIBNAME = (char *)"gamescc";
 #define MYCCNAME "games"
 
 #define RPC_FUNCS    \
-    { (char *)MYCCNAME, (char *)"func0", (char *)"<parameter help>", 1, 1, '0', EVAL_GAMES }, \
+    { (char *)MYCCNAME, (char *)"rng", (char *)"hash,seed,playerid", 2, 3, '0', EVAL_GAMES }, \
     { (char *)MYCCNAME, (char *)"func1", (char *)"<no args>", 0, 0, '1', EVAL_GAMES },
 
 bool games_validate(struct CCcontract_info *cp,int32_t height,Eval *eval,const CTransaction tx);
-UniValue games_func0(uint64_t txfee,struct CCcontract_info *cp,cJSON *params);
+UniValue games_rng(uint64_t txfee,struct CCcontract_info *cp,cJSON *params);
 UniValue games_func1(uint64_t txfee,struct CCcontract_info *cp,cJSON *params);
 
 #define CUSTOM_DISPATCH \
 if ( cp->evalcode == EVAL_GAMES ) \
 { \
-    if ( strcmp(method,"func0") == 0 ) \
-        return(games_func0(txfee,cp,params)); \
+    if ( strcmp(method,"rng") == 0 ) \
+        return(games_rng(txfee,cp,params)); \
     else if ( strcmp(method,"func1") == 0 ) \
         return(games_func1(txfee,cp,params)); \
     else \