dpow_notarytx: correct sapling unsigned raw tx with usesigs=0

now we have correct format of unsigned rawtx with sapling support inside
dpow_notarytx and correct format of signed raw tx when usesigs=0.
but as we don't yet create sapling preimage - sigs are still incorrect,
and notary tx can't be broadcasted.

iguana/dpow/dpow_tx.c

@@ -267,7 +267,8 @@ int32_t dpow_voutstandard(struct supernet_info *myinfo,struct dpow_block *bp,uin
 bits256 dpow_notarytx(struct supernet_info *myinfo,char *signedtx,int32_t *numsigsp,int32_t isPoS,struct dpow_block *bp,int8_t bestk,uint64_t bestmask,int32_t usesigs,int32_t src_or_dest,uint8_t pubkeys[][33],int32_t numratified)
 {
     uint32_t k,m,numsigs,version,vout,crcval,sequenceid = 0xffffffff; bits256 zero; int32_t n,siglen,len; uint8_t serialized[32768],*sig; bits256 txid; struct dpow_entry *ep; struct dpow_coinentry *cp;
-    
+    // int32_t preimage_len; uint8_t preimage[32768]; // here we will create preimage, when usesigs=0 (?)
+
 	struct iguana_info *coin = (src_or_dest != 0) ? bp->destcoin : bp->srccoin;
 	uint32_t zcash = (strcmp(coin->symbol, "VRSC") == 0 || strcmp(coin->symbol, "VRSCTEST") == 0);
 	printf("[Decker] dpow_notarytx: src.(%s) dst.(%s) src_or_dest.(%d) usesigs.(%d)\n", bp->srccoin->symbol, bp->destcoin->symbol, src_or_dest, usesigs);
@@ -290,7 +291,6 @@ bits256 dpow_notarytx(struct supernet_info *myinfo,char *signedtx,int32_t *numsi
 		len += iguana_rwnum(1, &serialized[len], sizeof(versiongroupid), &versiongroupid);
 	}
 	
-	    
 	if ( isPoS != 0 )
         len += iguana_rwnum(1,&serialized[len],sizeof(bp->timestamp),&bp->timestamp);
     m = bp->minsigs;
@@ -344,7 +344,7 @@ bits256 dpow_notarytx(struct supernet_info *myinfo,char *signedtx,int32_t *numsi
             len += iguana_rwbignum(1,&serialized[len],sizeof(txid),txid.bytes);
             len += iguana_rwnum(1,&serialized[len],sizeof(vout),&vout);
             
-			if ( usesigs != 0 && bestk >= 0 )
+			if ( usesigs != 0 && bestk >= 0 ) // usesigs=1 -> insert signature
             {
                 len += iguana_rwvarint32(1,&serialized[len],(uint32_t *)&siglen);
                 if ( siglen > 0 && siglen <= sizeof(cp->sigs[bestk]) )
@@ -353,7 +353,7 @@ bits256 dpow_notarytx(struct supernet_info *myinfo,char *signedtx,int32_t *numsi
                     len += siglen;
                     numsigs++;
                 } //else printf("%s -> %s src_or_dest.%d Missing sig from k.%d\n",bp->srccoin->symbol,bp->destcoin->symbol,src_or_dest,k);
-            } else serialized[len++] = 0;
+            } else serialized[len++] = 0; // usesigs=0 -> insert scriptlen = 0
 
             len += iguana_rwnum(1,&serialized[len],sizeof(sequenceid),&sequenceid);
             //printf("height.%d mod.%d VINI.%d <- i.%d j.%d\n",height,height % numnotaries,m,i,j);
@@ -369,6 +369,22 @@ bits256 dpow_notarytx(struct supernet_info *myinfo,char *signedtx,int32_t *numsi
         return(zero);
     }
     len += n;
+
+	if (zcash) {
+		uint32_t nExpiryHeight = 0;
+		uint64_t valueBalance = 0;
+		uint8_t nShieldedSpend = 0;
+		uint8_t nShieldedOutput = 0;
+		uint8_t nJoinSplit = 0;
+		len += iguana_rwnum(1, &serialized[len], sizeof(nExpiryHeight), &nExpiryHeight);
+		len += iguana_rwnum(1, &serialized[len], sizeof(valueBalance), &valueBalance);
+		len += iguana_rwnum(1, &serialized[len], sizeof(nShieldedSpend), &nShieldedSpend); // The number of Spend descriptions in vShieldedSpend
+		len += iguana_rwnum(1, &serialized[len], sizeof(nShieldedOutput), &nShieldedOutput); // The number of Output descriptions in vShieldedOutput
+		len += iguana_rwnum(1, &serialized[len], sizeof(nJoinSplit), &nJoinSplit); // The number of JoinSplit descriptions in vJoinSplit
+	}
+
+	// here if usesigs=0 we have unsigned tx (not preimage), if usesigs=1 - we have signed tx with sigs from nn_bus network (?)
+
     init_hexbytes_noT(signedtx,serialized,len);
 	printf("[Decker] dpow_notarytx: signedtx.(%s)\n", signedtx);