diff --git a/src/cc/oracles.cpp b/src/cc/oracles.cpp
index fbb60a04e..db76eece2 100644
--- a/src/cc/oracles.cpp
+++ b/src/cc/oracles.cpp
@@ -42,6 +42,15 @@
  2) pay provider for N oracle data points -> lock funds for oracle provider
  3) publish oracle data point -> publish data and collect payment
  
+ The format string is a set of chars with the following meaning:
+  's' -> <256 char string
+  'S' -> <65536 char string
+  'c' -> 1 byte signed little endian number, 'C' unsigned
+  't' -> 2 byte signed little endian number, 'T' unsigned
+  'i' -> 4 byte signed little endian number, 'I' unsigned
+  'l' -> 8 byte signed little endian number, 'L' unsigned
+  uppercase is unsigned, lowercase is a signed number
+ 
  create:
  vins.*: normal inputs
  vout.0: txfee tag to oracle normal address
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 4e0986502..c4defc18c 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -5425,7 +5425,7 @@ UniValue oraclessubscribe(const UniValue& params, bool fHelp)
 
 UniValue oraclessamples(const UniValue& params, bool fHelp)
 {
-    UniValue result(UniValue::VOBJ); uint256 txid; int32_t num; std::string hex;
+    UniValue result(UniValue::VOBJ); uint256 txid,batontxid; int32_t num; std::string hex;
     if ( fHelp || params.size() != 3 )
         throw runtime_error("oraclessamples oracletxid batonutxo num\n");
     if ( ensure_CCrequirements() < 0 )