diff --git a/libraries/app/database_api.cpp b/libraries/app/database_api.cpp
index 6b14f2bc3..7ac0f7629 100644
--- a/libraries/app/database_api.cpp
+++ b/libraries/app/database_api.cpp
@@ -217,6 +217,10 @@ class database_api_impl : public std::enable_shared_from_this<database_api_impl>
       vector<offer_history_object> get_offer_history_by_item(const offer_history_id_type lower_id, const nft_id_type item, uint32_t limit) const;
       vector<offer_history_object> get_offer_history_by_bidder(const offer_history_id_type lower_id, const account_id_type bidder_account_id, uint32_t limit) const;
 
+      // rng
+      vector<uint64_t> get_random_number_ex(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates) const;
+      uint64_t get_random_number(uint64_t bound) const;
+
    //private:
       const account_object* get_account_from_string( const std::string& name_or_id,
                                                      bool throw_if_not_found = true ) const;
@@ -2888,6 +2892,60 @@ vector<offer_history_object> database_api_impl::get_offer_history_by_bidder(cons
 
    return result;
 }
+
+//////////////////////////////////////////////////////////////////////
+//                                                                  //
+// Random numbers                                                   //
+//                                                                  //
+//////////////////////////////////////////////////////////////////////
+
+vector<uint64_t> database_api::get_random_number_ex(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates) const
+{
+   return my->get_random_number_ex(minimum, maximum, selections, duplicates);
+}
+
+vector<uint64_t> database_api_impl::get_random_number_ex(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates) const
+{
+   FC_ASSERT( selections <= 100000 );
+   if (duplicates == false) {
+      FC_ASSERT( maximum - minimum >= selections );
+   }
+
+   vector<uint64_t> v;
+   v.reserve(selections);
+
+   if (duplicates) {
+      for (uint64_t i = 0; i < selections; i++) {
+         int64_t rnd = _db.get_random_bits(maximum - minimum) + minimum;
+         v.push_back(rnd);
+      }
+   } else {
+      vector<uint64_t> tmpv;
+      tmpv.reserve(selections);
+      for (uint64_t i = minimum; i < maximum; i++) {
+         tmpv.push_back(i);
+      }
+
+      for (uint64_t i = 0; (i < selections) && (tmpv.size() > 0); i++) {
+         uint64_t idx = _db.get_random_bits(tmpv.size());
+         v.push_back(tmpv.at(idx));
+         tmpv.erase(tmpv.begin() + idx);
+      }
+   }
+
+   return v;
+}
+
+uint64_t database_api::get_random_number(uint64_t bound) const
+{
+   return my->get_random_number(bound);
+}
+
+uint64_t database_api_impl::get_random_number(uint64_t bound) const {
+    vector<uint64_t> v = get_random_number_ex(0, bound, 1, false);
+    return v.at(0);
+}
+
 //////////////////////////////////////////////////////////////////////
 //                                                                  //
 // Private methods                                                  //
diff --git a/libraries/app/include/graphene/app/database_api.hpp b/libraries/app/include/graphene/app/database_api.hpp
index 0b1411252..4d3c0a841 100644
--- a/libraries/app/include/graphene/app/database_api.hpp
+++ b/libraries/app/include/graphene/app/database_api.hpp
@@ -829,7 +829,28 @@ class database_api
       vector<offer_history_object> get_offer_history_by_issuer(const offer_history_id_type lower_id, const account_id_type issuer_account_id, uint32_t limit) const;
       vector<offer_history_object> get_offer_history_by_item(const offer_history_id_type lower_id, const nft_id_type item, uint32_t limit) const;
       vector<offer_history_object> get_offer_history_by_bidder(const offer_history_id_type lower_id, const account_id_type bidder_account_id, uint32_t limit) const;
-private:
+
+      /////////////////////////////
+      // Random number generator //
+      /////////////////////////////
+      /**
+       * @brief Returns the random number
+       * @param minimum Lower bound of segment containing random number
+       * @param maximum Upper bound of segment containing random number
+       * @param selections Number of random numbers to return
+       * @param duplicates Allow duplicated numbers
+       * @return Vector containing random numbers from segment [minimum, maximum)
+       */
+      vector<uint64_t> get_random_number_ex(uint64_t minimum, uint64_t maximum, uint64_t selections, bool duplicates) const;
+
+      /**
+       * @brief Returns the random number
+       * @param bound Upper bound of segment containing random number
+       * @return Random number from segment [0, bound)
+       */
+      uint64_t get_random_number(uint64_t bound) const;
+
+   private:
       std::shared_ptr< database_api_impl > my;
 };
 
@@ -999,4 +1020,8 @@ FC_API(graphene::app::database_api,
    (get_offer_history_by_issuer)
    (get_offer_history_by_item)
    (get_offer_history_by_bidder)
+
+   // rngs
+   (get_random_number_ex)
+   (get_random_number)
 )
diff --git a/libraries/chain/CMakeLists.txt b/libraries/chain/CMakeLists.txt
index 88d868e5e..dcd2fc699 100644
--- a/libraries/chain/CMakeLists.txt
+++ b/libraries/chain/CMakeLists.txt
@@ -125,6 +125,8 @@ add_library( graphene_chain
              nft_evaluator.cpp
              protocol/nft.cpp
 
+             random_number_evaluator.cpp
+
              ${HEADERS}
              ${PROTOCOL_HEADERS}
              "${CMAKE_CURRENT_BINARY_DIR}/include/graphene/chain/hardfork.hpp"
diff --git a/libraries/chain/db_init.cpp b/libraries/chain/db_init.cpp
index 9ae1fb964..28a73a23f 100644
--- a/libraries/chain/db_init.cpp
+++ b/libraries/chain/db_init.cpp
@@ -52,6 +52,7 @@
 #include <graphene/chain/custom_permission_object.hpp>
 #include <graphene/chain/custom_account_authority_object.hpp>
 #include <graphene/chain/offer_object.hpp>
+#include <graphene/chain/random_number_object.hpp>
 
 #include <graphene/chain/nft_object.hpp>
 
@@ -85,6 +86,7 @@
 #include <graphene/chain/custom_account_authority_evaluator.hpp>
 #include <graphene/chain/offer_evaluator.hpp>
 #include <graphene/chain/nft_evaluator.hpp>
+#include <graphene/chain/random_number_evaluator.hpp>
 
 #include <graphene/chain/protocol/fee_schedule.hpp>
 
@@ -186,6 +188,9 @@ const uint8_t offer_object::type_id;
 const uint8_t offer_history_object::space_id;
 const uint8_t offer_history_object::type_id;
 
+const uint8_t random_number_object::space_id;
+const uint8_t random_number_object::type_id;
+
 void database::initialize_evaluators()
 {
    _operation_evaluators.resize(255);
@@ -275,6 +280,7 @@ void database::initialize_evaluators()
    register_evaluator<nft_safe_transfer_from_evaluator>();
    register_evaluator<nft_approve_evaluator>();
    register_evaluator<nft_set_approval_for_all_evaluator>();
+   register_evaluator<random_number_store_evaluator>();
 }
 
 void database::initialize_indexes()
@@ -353,6 +359,7 @@ void database::initialize_indexes()
    add_index< primary_index<lottery_balance_index                         > >();
    add_index< primary_index<sweeps_vesting_balance_index                  > >();
    add_index< primary_index<offer_history_index                           > >();
+   add_index< primary_index<random_number_index                           > >();
 
 }
 
diff --git a/libraries/chain/db_notify.cpp b/libraries/chain/db_notify.cpp
index f56e3d8b3..e10a72661 100644
--- a/libraries/chain/db_notify.cpp
+++ b/libraries/chain/db_notify.cpp
@@ -344,6 +344,9 @@ struct get_impacted_account_visitor
    void operator()( const finalize_offer_operation& op ) {
        _impacted.insert( op.fee_paying_account );
    }
+   void operator()( const random_number_store_operation& op ) {
+      _impacted.insert( op.account );
+   }
 };
 
 void graphene::chain::operation_get_impacted_accounts( const operation& op, flat_set<account_id_type>& result )
diff --git a/libraries/chain/include/graphene/chain/protocol/operations.hpp b/libraries/chain/include/graphene/chain/protocol/operations.hpp
index 1285d3531..430726c59 100644
--- a/libraries/chain/include/graphene/chain/protocol/operations.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/operations.hpp
@@ -49,6 +49,7 @@
 #include <graphene/chain/protocol/custom_account_authority.hpp>
 #include <graphene/chain/protocol/offer.hpp>
 #include <graphene/chain/protocol/nft_ops.hpp>
+#include <graphene/chain/protocol/random_number.hpp>
 
 namespace graphene { namespace chain {
 
@@ -155,7 +156,8 @@ namespace graphene { namespace chain {
             nft_mint_operation,
             nft_safe_transfer_from_operation,
             nft_approve_operation,
-            nft_set_approval_for_all_operation
+            nft_set_approval_for_all_operation,
+            random_number_store_operation
          > operation;
 
    /// @} // operations group
diff --git a/libraries/chain/include/graphene/chain/protocol/random_number.hpp b/libraries/chain/include/graphene/chain/protocol/random_number.hpp
new file mode 100644
index 000000000..3dbe487fd
--- /dev/null
+++ b/libraries/chain/include/graphene/chain/protocol/random_number.hpp
@@ -0,0 +1,25 @@
+#pragma once
+
+namespace graphene { namespace chain {
+
+   struct random_number_store_operation : public base_operation
+   {
+      struct fee_parameters_type { uint64_t fee = 5000 * GRAPHENE_BLOCKCHAIN_PRECISION; };
+
+      asset             fee;
+
+      account_id_type account;
+      vector<uint64_t> random_number;
+      std::string data;
+
+      account_id_type fee_payer()const { return account; }
+   };
+
+} } // graphene::chain
+
+FC_REFLECT( graphene::chain::random_number_store_operation::fee_parameters_type, (fee) )
+FC_REFLECT( graphene::chain::random_number_store_operation, (fee)
+             (account)
+             (random_number)
+             (data) )
+
diff --git a/libraries/chain/include/graphene/chain/protocol/types.hpp b/libraries/chain/include/graphene/chain/protocol/types.hpp
index 6fa2ab4d1..2be8ae345 100644
--- a/libraries/chain/include/graphene/chain/protocol/types.hpp
+++ b/libraries/chain/include/graphene/chain/protocol/types.hpp
@@ -176,6 +176,7 @@ namespace graphene { namespace chain {
       offer_object_type,
       nft_metadata_type,
       nft_object_type,
+      random_number_object_type,
       OBJECT_TYPE_COUNT ///< Sentry value which contains the number of different object types
    };
 
@@ -241,6 +242,7 @@ namespace graphene { namespace chain {
    class offer_object;
    class nft_metadata_object;
    class nft_object;
+   class random_number_object;
 
    typedef object_id< protocol_ids, account_object_type,            account_object>               account_id_type;
    typedef object_id< protocol_ids, asset_object_type,              asset_object>                 asset_id_type;
@@ -272,6 +274,7 @@ namespace graphene { namespace chain {
    typedef object_id< protocol_ids, offer_object_type,              offer_object>                 offer_id_type;
    typedef object_id< protocol_ids, nft_metadata_type,              nft_metadata_object>          nft_metadata_id_type;
    typedef object_id< protocol_ids, nft_object_type,                nft_object>                   nft_id_type;
+   typedef object_id< protocol_ids, random_number_object_type,      random_number_object>         random_number_id_type;
 
    // implementation types
    class global_property_object;
@@ -459,6 +462,7 @@ FC_REFLECT_ENUM( graphene::chain::object_type,
                  (offer_object_type)
                  (nft_metadata_type)
                  (nft_object_type)
+                 (random_number_object_type)
                  (OBJECT_TYPE_COUNT)
                )
 FC_REFLECT_ENUM( graphene::chain::impl_object_type,
@@ -535,6 +539,7 @@ FC_REFLECT_TYPENAME( graphene::chain::custom_account_authority_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::offer_history_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::nft_metadata_id_type )
 FC_REFLECT_TYPENAME( graphene::chain::nft_id_type )
+FC_REFLECT_TYPENAME( graphene::chain::random_number_id_type )
 
 FC_REFLECT( graphene::chain::void_t, )
 
diff --git a/libraries/chain/include/graphene/chain/random_number_evaluator.hpp b/libraries/chain/include/graphene/chain/random_number_evaluator.hpp
new file mode 100644
index 000000000..a26b9f3ec
--- /dev/null
+++ b/libraries/chain/include/graphene/chain/random_number_evaluator.hpp
@@ -0,0 +1,19 @@
+#pragma once
+#include <graphene/chain/database.hpp>
+#include <graphene/chain/evaluator.hpp>
+#include <graphene/chain/protocol/operations.hpp>
+#include <graphene/chain/protocol/types.hpp>
+
+namespace graphene { namespace chain {
+
+   class random_number_store_evaluator : public evaluator<random_number_store_evaluator>
+   {
+      public:
+         typedef random_number_store_operation operation_type;
+
+         void_result do_evaluate( const random_number_store_operation& o );
+         object_id_type do_apply( const random_number_store_operation& o );
+   };
+
+} } // graphene::chain
+
diff --git a/libraries/chain/include/graphene/chain/random_number_object.hpp b/libraries/chain/include/graphene/chain/random_number_object.hpp
new file mode 100644
index 000000000..3613d7a19
--- /dev/null
+++ b/libraries/chain/include/graphene/chain/random_number_object.hpp
@@ -0,0 +1,41 @@
+#pragma once
+
+namespace graphene { namespace chain {
+   using namespace graphene::db;
+
+   class random_number_object : public abstract_object<random_number_object>
+   {
+      public:
+         static const uint8_t space_id = protocol_ids;
+         static const uint8_t type_id  = random_number_object_type;
+
+         account_id_type account; /* account who requested random number */
+         time_point_sec timestamp; /* date and time when the number is read */
+         vector<uint64_t> random_number; /* random number(s) */
+         std::string data; /* custom data in json format */
+   };
+
+   struct by_account;
+   struct by_timestamp;
+   using random_number_multi_index_type = multi_index_container<
+      random_number_object,
+      indexed_by<
+         ordered_unique< tag<by_id>,
+            member<object, object_id_type, &object::id>
+         >,
+         ordered_non_unique< tag<by_account>,
+            member<random_number_object, account_id_type, &random_number_object::account>
+         >,
+         ordered_non_unique< tag<by_timestamp>,
+            member<random_number_object, time_point_sec, &random_number_object::timestamp>
+         >
+      >
+   >;
+   using random_number_index = generic_index<random_number_object, random_number_multi_index_type>;
+
+} } // graphene::chain
+
+FC_REFLECT_DERIVED( graphene::chain::random_number_object, (graphene::db::object),
+                    (account) (timestamp)
+                    (random_number) (data) )
+
diff --git a/libraries/chain/random_number_evaluator.cpp b/libraries/chain/random_number_evaluator.cpp
new file mode 100644
index 000000000..acfab042a
--- /dev/null
+++ b/libraries/chain/random_number_evaluator.cpp
@@ -0,0 +1,24 @@
+#include <graphene/chain/random_number_evaluator.hpp>
+#include <graphene/chain/random_number_object.hpp>
+
+namespace graphene { namespace chain {
+
+void_result random_number_store_evaluator::do_evaluate( const random_number_store_operation& op )
+{ try {
+
+   return void_result();
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+object_id_type random_number_store_evaluator::do_apply( const random_number_store_operation& op )
+{ try {
+   const auto& new_random_number_object = db().create<random_number_object>( [&]( random_number_object& obj ) {
+         obj.account        = op.account;
+         obj.timestamp      = db().head_block_time();
+         obj.random_number  = op.random_number;
+         obj.data           = op.data;
+   });
+   return new_random_number_object.id;
+} FC_CAPTURE_AND_RETHROW( (op) ) }
+
+} } // graphene::chain
+
diff --git a/libraries/wallet/include/graphene/wallet/wallet.hpp b/libraries/wallet/include/graphene/wallet/wallet.hpp
index 7f5913287..d224cff66 100644
--- a/libraries/wallet/include/graphene/wallet/wallet.hpp
+++ b/libraries/wallet/include/graphene/wallet/wallet.hpp
@@ -68,7 +68,7 @@ struct brain_key_info
  *  the meta data about the receipt that helps the sender identify which receipt is
  *  for the receiver and which is for the change address.
  */
-struct blind_confirmation 
+struct blind_confirmation
 {
    struct output
    {
@@ -312,7 +312,7 @@ class wallet_api
        */
       uint64_t                          get_account_count()const;
       /** Lists all accounts controlled by this wallet.
-       * This returns a list of the full account objects for all accounts whose private keys 
+       * This returns a list of the full account objects for all accounts whose private keys
        * we possess.
        * @returns a list of account objects
        */
@@ -324,14 +324,14 @@ class wallet_api
        * start by setting \c lowerbound to the empty string \c "", and then each iteration, pass
        * the last account name returned as the \c lowerbound for the next \c list_accounts() call.
        *
-       * @param lowerbound the name of the first account to return.  If the named account does not exist, 
+       * @param lowerbound the name of the first account to return.  If the named account does not exist,
        *                   the list will start at the account that comes after \c lowerbound
        * @param limit the maximum number of accounts to return (max: 1000)
        * @returns a list of accounts mapping account names to account ids
        */
       map<string,account_id_type>       list_accounts(const string& lowerbound, uint32_t limit);
       /** List the balances of an account.
-       * Each account can have multiple balances, one for each type of asset owned by that 
+       * Each account can have multiple balances, one for each type of asset owned by that
        * account.  The returned list will only contain assets for which the account has a
        * nonzero balance
        * @param id the name or id of the account whose balances you want
@@ -339,7 +339,7 @@ class wallet_api
        */
       vector<asset>                     list_account_balances(const string& id);
       /** Lists all assets registered on the blockchain.
-       * 
+       *
        * To list all assets, pass the empty string \c "" for the lowerbound to start
        * at the beginning of the list, and iterate as necessary.
        *
@@ -350,12 +350,12 @@ class wallet_api
       vector<asset_object>              list_assets(const string& lowerbound, uint32_t limit)const;
 
       /** Returns assets count registered on the blockchain.
-       * 
+       *
        * @returns assets count
        */
       uint64_t get_asset_count()const;
-   
-   
+
+
       vector<asset_object>              get_lotteries( asset_id_type stop = asset_id_type(),
                                                        unsigned limit = 100,
                                                        asset_id_type start = asset_id_type() )const;
@@ -391,7 +391,7 @@ class wallet_api
       vector<limit_order_object>        get_limit_orders(string a, string b, uint32_t limit)const;
       vector<call_order_object>         get_call_orders(string a, uint32_t limit)const;
       vector<force_settlement_object>   get_settle_orders(string a, uint32_t limit)const;
-      
+
       /** Returns the block chain's slowly-changing settings.
        * This object contains all of the properties of the blockchain that are fixed
        * or that change only once per maintenance interval (daily) such as the
@@ -447,8 +447,8 @@ class wallet_api
        * Returns the blockchain object corresponding to the given id.
        *
        * This generic function can be used to retrieve any object from the blockchain
-       * that is assigned an ID.  Certain types of objects have specialized convenience 
-       * functions to return their objects -- e.g., assets have \c get_asset(), accounts 
+       * that is assigned an ID.  Certain types of objects have specialized convenience
+       * functions to return their objects -- e.g., assets have \c get_asset(), accounts
        * have \c get_account(), but this function will work for any object.
        *
        * @param id the id of the object to return
@@ -456,7 +456,7 @@ class wallet_api
        */
       variant                           get_object(object_id_type id) const;
 
-      /** Returns the current wallet filename.  
+      /** Returns the current wallet filename.
        *
        * This is the filename that will be used when automatically saving the wallet.
        *
@@ -532,21 +532,21 @@ class wallet_api
        * @ingroup Wallet Management
        */
       bool    is_new()const;
-      
-      /** Checks whether the wallet is locked (is unable to use its private keys).  
+
+      /** Checks whether the wallet is locked (is unable to use its private keys).
        *
        * This state can be changed by calling \c lock() or \c unlock().
        * @return true if the wallet is locked
        * @ingroup Wallet Management
        */
       bool    is_locked()const;
-      
+
       /** Locks the wallet immediately.
        * @ingroup Wallet Management
        */
       void    lock();
-      
-      /** Unlocks the wallet.  
+
+      /** Unlocks the wallet.
        *
        * The wallet remain unlocked until the \c lock is called
        * or the program exits.
@@ -554,7 +554,7 @@ class wallet_api
        * @ingroup Wallet Management
        */
       void    unlock(string password);
-      
+
       /** Sets a new password on the wallet.
        *
        * The wallet must be either 'new' or 'unlocked' to
@@ -567,7 +567,7 @@ class wallet_api
        *
        * The keys are printed in WIF format.  You can import these keys into another wallet
        * using \c import_key()
-       * @returns a map containing the private keys, indexed by their public key 
+       * @returns a map containing the private keys, indexed by their public key
        */
       map<public_key_type, string> dump_private_keys();
 
@@ -602,13 +602,13 @@ class wallet_api
       bool    load_wallet_file(string wallet_filename = "");
 
       /** Quitting from Peerplays wallet.
-       * 
+       *
        * The current wallet will be closed.
        */
       void    quit();
 
       /** Saves the current wallet to the given filename.
-       * 
+       *
        * @warning This does not change the wallet filename that will be used for future
        * writes, so think of this function as 'Save a Copy As...' instead of
        * 'Save As...'.  Use \c set_wallet_filename() to make the filename
@@ -677,7 +677,7 @@ class wallet_api
       /** Imports the private key for an existing account.
        *
        * The private key must match either an owner key or an active key for the
-       * named account.  
+       * named account.
        *
        * @see dump_private_keys()
        *
@@ -780,7 +780,7 @@ class wallet_api
        * @param to the name or id of the account receiving the funds
        * @param amount the amount to send (in nominal units -- to send half of a BTS, specify 0.5)
        * @param asset_symbol the symbol or id of the asset to send
-       * @param memo a memo to attach to the transaction.  The memo will be encrypted in the 
+       * @param memo a memo to attach to the transaction.  The memo will be encrypted in the
        *             transaction and readable for the receiver.  There is no length limit
        *             other than the limit imposed by maximum transaction size, but transaction
        *             increase with transaction size
@@ -855,7 +855,7 @@ class wallet_api
        *  who sent it.
        *
        *  @param opt_from - if not empty and the sender is a unknown public key, then the unknown public key will be given the label opt_from
-       *  @param confirmation_receipt - a base58 encoded stealth confirmation 
+       *  @param confirmation_receipt - a base58 encoded stealth confirmation
        */
       blind_receipt receive_blind_transfer( string confirmation_receipt, string opt_from, string opt_memo );
 
@@ -863,18 +863,18 @@ class wallet_api
        *  Transfers a public balance from @from to one or more blinded balances using a
        *  stealth transfer.
        */
-      blind_confirmation transfer_to_blind( string from_account_id_or_name, 
+      blind_confirmation transfer_to_blind( string from_account_id_or_name,
                                             string asset_symbol,
                                             /** map from key or label to amount */
-                                            vector<pair<string, string>> to_amounts, 
+                                            vector<pair<string, string>> to_amounts,
                                             bool broadcast = false );
 
       /**
        * Transfers funds from a set of blinded balances to a public account balance.
        */
-      blind_confirmation transfer_from_blind( 
+      blind_confirmation transfer_from_blind(
                                             string from_blind_account_key_or_label,
-                                            string to_account_id_or_name, 
+                                            string to_account_id_or_name,
                                             string amount,
                                             string asset_symbol,
                                             bool broadcast = false );
@@ -890,14 +890,14 @@ class wallet_api
 
       /** Place a limit order attempting to sell one asset for another.
        *
-       * Buying and selling are the same operation on Graphene; if you want to buy BTS 
+       * Buying and selling are the same operation on Graphene; if you want to buy BTS
        * with USD, you should sell USD for BTS.
        *
        * The blockchain will attempt to sell the \c symbol_to_sell for as
-       * much \c symbol_to_receive as possible, as long as the price is at 
-       * least \c min_to_receive / \c amount_to_sell.   
+       * much \c symbol_to_receive as possible, as long as the price is at
+       * least \c min_to_receive / \c amount_to_sell.
        *
-       * In addition to the transaction fees, market fees will apply as specified 
+       * In addition to the transaction fees, market fees will apply as specified
        * by the issuer of both the selling asset and the receiving asset as
        * a percentage of the amount exchanged.
        *
@@ -910,16 +910,16 @@ class wallet_api
        *
        * @todo Allow order expiration to be set here.  Document default/max expiration time
        *
-       * @param seller_account the account providing the asset being sold, and which will 
+       * @param seller_account the account providing the asset being sold, and which will
        *                       receive the proceeds of the sale.
        * @param amount_to_sell the amount of the asset being sold to sell (in nominal units)
        * @param symbol_to_sell the name or id of the asset to sell
        * @param min_to_receive the minimum amount you are willing to receive in return for
        *                       selling the entire amount_to_sell
        * @param symbol_to_receive the name or id of the asset you wish to receive
-       * @param timeout_sec if the order does not fill immediately, this is the length of 
-       *                    time the order will remain on the order books before it is 
-       *                    cancelled and the un-spent funds are returned to the seller's 
+       * @param timeout_sec if the order does not fill immediately, this is the length of
+       *                    time the order will remain on the order books before it is
+       *                    cancelled and the un-spent funds are returned to the seller's
        *                    account
        * @param fill_or_kill if true, the order will only be included in the blockchain
        *                     if it is filled immediately; if false, an open order will be
@@ -936,12 +936,12 @@ class wallet_api
                                     uint32_t timeout_sec = 0,
                                     bool     fill_or_kill = false,
                                     bool     broadcast = false);
-                                    
+
       /** Place a limit order attempting to sell one asset for another.
-       * 
+       *
        * This API call abstracts away some of the details of the sell_asset call to be more
        * user friendly. All orders placed with sell never timeout and will not be killed if they
-       * cannot be filled immediately. If you wish for one of these parameters to be different, 
+       * cannot be filled immediately. If you wish for one of these parameters to be different,
        * then sell_asset should be used instead.
        *
        * @param seller_account the account providing the asset being sold, and which will
@@ -951,7 +951,7 @@ class wallet_api
        * @param rate The rate in base:quote at which you want to sell.
        * @param amount The amount of base you want to sell.
        * @param broadcast true to broadcast the transaction on the network.
-       * @returns The signed transaction selling the funds.                 
+       * @returns The signed transaction selling the funds.
        */
       signed_transaction sell( string seller_account,
                                string base,
@@ -959,7 +959,7 @@ class wallet_api
                                double rate,
                                double amount,
                                bool broadcast );
-                               
+
       /** Place a limit order attempting to buy one asset with another.
        *
        * This API call abstracts away some of the details of the sell_asset call to be more
@@ -1014,14 +1014,14 @@ class wallet_api
        * Right now this function is difficult to use because you must provide raw JSON data
        * structures for the options objects, and those include prices and asset ids.
        *
-       * @param issuer the name or id of the account who will pay the fee and become the 
+       * @param issuer the name or id of the account who will pay the fee and become the
        *               issuer of the new asset.  This can be updated later
        * @param symbol the ticker symbol of the new asset
        * @param precision the number of digits of precision to the right of the decimal point,
        *                  must be less than or equal to 12
        * @param common asset options required for all new assets.
-       *               Note that core_exchange_rate technically needs to store the asset ID of 
-       *               this new asset. Since this ID is not known at the time this operation is 
+       *               Note that core_exchange_rate technically needs to store the asset ID of
+       *               this new asset. Since this ID is not known at the time this operation is
        *               created, create this price as though the new asset has instance ID 1, and
        *               the chain will overwrite it with the new asset's ID.
        * @param bitasset_opts options specific to BitAssets.  This may be null unless the
@@ -1041,7 +1041,7 @@ class wallet_api
                                           asset_options common,
                                           lottery_asset_options lottery_opts,
                                           bool broadcast = false);
-   
+
       signed_transaction buy_ticket( asset_id_type lottery, account_id_type buyer, uint64_t tickets_to_buy );
 
       /** Issue new shares of an asset.
@@ -1059,8 +1059,8 @@ class wallet_api
                                      bool broadcast = false);
 
       /** Update the core options on an asset.
-       * There are a number of options which all assets in the network use. These options are 
-       * enumerated in the asset_object::asset_options struct. This command is used to update 
+       * There are a number of options which all assets in the network use. These options are
+       * enumerated in the asset_object::asset_options struct. This command is used to update
        * these options for an existing asset.
        *
        * @note This operation cannot be used to update BitAsset-specific options. For these options,
@@ -1124,7 +1124,7 @@ class wallet_api
       signed_transaction update_asset_feed_producers(string symbol,
                                                      flat_set<string> new_feed_producers,
                                                      bool broadcast = false);
-      
+
       /** Publishes a price feed for the named asset.
        *
        * Price feed providers use this command to publish their price feeds for market-issued assets. A price feed is
@@ -1152,7 +1152,7 @@ class wallet_api
 
       /** Pay into the fee pool for the given asset.
        *
-       * User-issued assets can optionally have a pool of the core asset which is 
+       * User-issued assets can optionally have a pool of the core asset which is
        * automatically used to pay transaction fees for any transaction using that
        * asset (using the asset's core exchange rate).
        *
@@ -1193,7 +1193,7 @@ class wallet_api
        * used as backing for other bitassets, those bitassets will be force settled at their current
        * feed price.
        *
-       * @note this operation is used only by the asset issuer, \c settle_asset() may be used by 
+       * @note this operation is used only by the asset issuer, \c settle_asset() may be used by
        *       any user owning the asset
        *
        * @param symbol the name or id of the asset to force settlement on
@@ -1261,7 +1261,7 @@ class wallet_api
        * @returns the signed transaction registering a committee_member
        */
       signed_transaction create_committee_member(string owner_account,
-                                         string url, 
+                                         string url,
                                          bool broadcast = false);
 
       /** Lists all witnesses registered in the blockchain.
@@ -1272,7 +1272,7 @@ class wallet_api
        * start by setting \c lowerbound to the empty string \c "", and then each iteration, pass
        * the last witness name returned as the \c lowerbound for the next \c list_witnesss() call.
        *
-       * @param lowerbound the name of the first witness to return.  If the named witness does not exist, 
+       * @param lowerbound the name of the first witness to return.  If the named witness does not exist,
        *                   the list will start at the witness that comes after \c lowerbound
        * @param limit the maximum number of witnesss to return (max: 1000)
        * @returns a list of witnesss mapping witness names to witness ids
@@ -1287,7 +1287,7 @@ class wallet_api
        * start by setting \c lowerbound to the empty string \c "", and then each iteration, pass
        * the last committee_member name returned as the \c lowerbound for the next \c list_committee_members() call.
        *
-       * @param lowerbound the name of the first committee_member to return.  If the named committee_member does not exist, 
+       * @param lowerbound the name of the first committee_member to return.  If the named committee_member does not exist,
        *                   the list will start at the committee_member that comes after \c lowerbound
        * @param limit the maximum number of committee_members to return (max: 1000)
        * @returns a list of committee_members mapping committee_member names to committee_member ids
@@ -1413,7 +1413,7 @@ class wallet_api
 
       /** Vote for a given committee_member.
        *
-       * An account can publish a list of all committee_memberes they approve of.  This 
+       * An account can publish a list of all committee_memberes they approve of.  This
        * command allows you to add or remove committee_memberes from this list.
        * Each account's vote is weighted according to the number of shares of the
        * core asset owned by that account at the time the votes are tallied.
@@ -1423,7 +1423,7 @@ class wallet_api
        *
        * @param voting_account the name or id of the account who is voting with their shares
        * @param committee_member the name or id of the committee_member' owner account
-       * @param approve true if you wish to vote in favor of that committee_member, false to 
+       * @param approve true if you wish to vote in favor of that committee_member, false to
        *                remove your vote in favor of that committee_member
        * @param broadcast true if you wish to broadcast the transaction
        * @return the signed transaction changing your vote for the given committee_member
@@ -1435,7 +1435,7 @@ class wallet_api
 
       /** Vote for a given witness.
        *
-       * An account can publish a list of all witnesses they approve of.  This 
+       * An account can publish a list of all witnesses they approve of.  This
        * command allows you to add or remove witnesses from this list.
        * Each account's vote is weighted according to the number of shares of the
        * core asset owned by that account at the time the votes are tallied.
@@ -1445,7 +1445,7 @@ class wallet_api
        *
        * @param voting_account the name or id of the account who is voting with their shares
        * @param witness the name or id of the witness' owner account
-       * @param approve true if you wish to vote in favor of that witness, false to 
+       * @param approve true if you wish to vote in favor of that witness, false to
        *                remove your vote in favor of that witness
        * @param broadcast true if you wish to broadcast the transaction
        * @return the signed transaction changing your vote for the given witness
@@ -1457,12 +1457,12 @@ class wallet_api
 
       /** Change your witness votes.
        *
-       * An account can publish a list of all witnesses they approve of.  
+       * An account can publish a list of all witnesses they approve of.
        * Each account's vote is weighted according to the number of shares of the
        * core asset owned by that account at the time the votes are tallied.
-       * This command allows you to add or remove one or more witnesses from this list 
+       * This command allows you to add or remove one or more witnesses from this list
        * in one call.  When you are changing your vote on several witnesses, this
-       * may be easier than multiple `vote_for_witness` and 
+       * may be easier than multiple `vote_for_witness` and
        * `set_desired_witness_and_committee_member_count` calls.
        *
        * @note you cannot vote against a witness, you can only vote for the witness
@@ -1477,7 +1477,7 @@ class wallet_api
        *                            you currently approve).  This list can be empty.
        * @param desired_number_of_witnesses the number of witnesses you believe the network
        *                                    should have.  You must vote for at least this many
-       *                                    witnesses.  You can set this to 0 to abstain from 
+       *                                    witnesses.  You can set this to 0 to abstain from
        *                                    voting on the number of witnesses.
        * @param broadcast true if you wish to broadcast the transaction
        * @return the signed transaction changing your vote for the given witnesses
@@ -1508,23 +1508,23 @@ class wallet_api
       signed_transaction set_voting_proxy(string account_to_modify,
                                           optional<string> voting_account,
                                           bool broadcast = false);
-      
+
       /** Set your vote for the number of witnesses and committee_members in the system.
        *
-       * Each account can voice their opinion on how many committee_members and how many 
+       * Each account can voice their opinion on how many committee_members and how many
        * witnesses there should be in the active committee_member/active witness list.  These
        * are independent of each other.  You must vote your approval of at least as many
        * committee_members or witnesses as you claim there should be (you can't say that there should
-       * be 20 committee_members but only vote for 10). 
+       * be 20 committee_members but only vote for 10).
        *
-       * There are maximum values for each set in the blockchain parameters (currently 
+       * There are maximum values for each set in the blockchain parameters (currently
        * defaulting to 1001).
        *
        * This setting can be changed at any time.  If your account has a voting proxy
        * set, your preferences will be ignored.
        *
        * @param account_to_modify the name or id of the account to update
-       * @param number_of_committee_members the number 
+       * @param number_of_committee_members the number
        *
        * @param broadcast true if you wish to broadcast the transaction
        * @return the signed transaction changing your vote proxy settings
@@ -1577,16 +1577,16 @@ class wallet_api
 
       /** Returns an uninitialized object representing a given blockchain operation.
        *
-       * This returns a default-initialized object of the given type; it can be used 
+       * This returns a default-initialized object of the given type; it can be used
        * during early development of the wallet when we don't yet have custom commands for
-       * creating all of the operations the blockchain supports.  
+       * creating all of the operations the blockchain supports.
        *
        * Any operation the blockchain supports can be created using the transaction builder's
-       * \c add_operation_to_builder_transaction() , but to do that from the CLI you need to 
+       * \c add_operation_to_builder_transaction() , but to do that from the CLI you need to
        * know what the JSON form of the operation looks like.  This will give you a template
        * you can fill in.  It's better than nothing.
-       * 
-       * @param operation_type the type of operation to return, must be one of the 
+       *
+       * @param operation_type the type of operation to return, must be one of the
        *                       operations defined in `graphene/chain/operations.hpp`
        *                       (e.g., "global_parameters_update_operation")
        * @return a default-constructed operation of the given type
@@ -1611,7 +1611,7 @@ class wallet_api
          bool broadcast = false);
 
       /** Propose a fee change.
-       * 
+       *
        * @param proposing_account The account paying the fee to propose the tx
        * @param expiration_time Timestamp specifying when the proposal will either take effect or expire.
        * @param changed_values Map of operation type to new fee.  Operations may be specified by name or ID.
@@ -1653,7 +1653,33 @@ class wallet_api
          const approval_delta& delta,
          bool broadcast /* = false */
          );
-         
+
+      /** Get random numbers
+       * @brief Returns the random number
+       * @param minimum Lower bound of segment containing random number
+       * @param maximum Upper bound of segment containing random number
+       * @param selections Number of random numbers to return
+       * @param duplicates Allow duplicated numbers
+       * @param broadcast true if you wish to broadcast the transaction
+       * @return the signed version of the transaction
+       * @return Vector containing random numbers from segment [minimum, maximum)
+       */
+      vector<uint64_t> get_random_number_ex(string account,
+                                            uint64_t minimum,
+                                            uint64_t maximum,
+                                            uint64_t selections,
+                                            bool duplicates,
+                                            bool broadcast);
+
+      /** Get random number
+       * @brief Returns the random number
+       * @param bound Upper bound of segment containing random number
+       * @return Random number from segment [0, bound)
+       */
+      uint64_t get_random_number(string account,
+                                 uint64_t bound,
+                                 bool broadcast);
+
       order_book get_order_book( const string& base, const string& quote, unsigned limit = 50);
 
       asset get_total_matched_bet_amount_for_betting_market_group(betting_market_group_id_type group_id);
@@ -1692,7 +1718,7 @@ class wallet_api
               sport_id_type sport_id,
               fc::optional<internationalized_string_type> name,
               bool broadcast = false);
-    
+
       signed_transaction propose_delete_sport(
               const string& proposing_account,
               fc::time_point_sec expiration_time,
@@ -1719,7 +1745,7 @@ class wallet_api
               fc::time_point_sec expiration_time,
               event_group_id_type event_group,
               bool broadcast = false);
-    
+
       signed_transaction propose_create_event(
               const string& proposing_account,
               fc::time_point_sec expiration_time,
@@ -1790,7 +1816,7 @@ class wallet_api
               fc::optional<internationalized_string_type> payout_condition,
               bool broadcast = false);
 
-      /** Place a bet  
+      /** Place a bet
        * @param bettor the account placing the bet
        * @param betting_market_id the market on which to bet
        * @param back_or_lay back or lay
@@ -1866,7 +1892,7 @@ class wallet_api
                                                          tournament_state state);
 
       /** Get specific information about a tournament
-       * @param tournament_id the ID of the tournament 
+       * @param tournament_id the ID of the tournament
        */
       tournament_object get_tournament(tournament_id_type id);
 
@@ -1926,6 +1952,7 @@ class wallet_api
       vector<custom_account_authority_object> get_custom_account_authorities_by_permission_id(custom_permission_id_type permission_id) const;
       vector<custom_account_authority_object> get_custom_account_authorities_by_permission_name(string owner, string permission_name) const;
       vector<authority> get_active_custom_account_authorities_by_operation(string owner, int operation_type) const;
+
       /////////
       // NFT //
       /////////
@@ -2202,7 +2229,7 @@ FC_REFLECT_DERIVED( graphene::wallet::signed_block_with_info, (graphene::chain::
 FC_REFLECT_DERIVED( graphene::wallet::vesting_balance_object_with_info, (graphene::chain::vesting_balance_object),
    (allowed_withdraw)(allowed_withdraw_time) )
 
-FC_REFLECT( graphene::wallet::operation_detail, 
+FC_REFLECT( graphene::wallet::operation_detail,
             (memo)(description)(op) )
 
 FC_API( graphene::wallet::wallet_api,
@@ -2312,6 +2339,8 @@ FC_API( graphene::wallet::wallet_api,
         (propose_fee_change)
         (propose_dividend_asset_update)
         (approve_proposal)
+        (get_random_number_ex)
+        (get_random_number)
         (dbg_make_uia)
         (dbg_make_mia)
         (dbg_push_blocks)
diff --git a/libraries/wallet/wallet.cpp b/libraries/wallet/wallet.cpp
index 97b31370f..2617a8262 100644
--- a/libraries/wallet/wallet.cpp
+++ b/libraries/wallet/wallet.cpp
@@ -615,7 +615,7 @@ class wallet_api_impl
 
       throw fc::canceled_exception();
    }
-   
+
    bool copy_wallet_file( string destination_filename )
    {
       fc::path src_path = get_wallet_filename();
@@ -907,7 +907,7 @@ class wallet_api_impl
          const rock_paper_scissors_game_details& rps_details = game_obj.game_details.get<rock_paper_scissors_game_details>();
          for (unsigned i = 0; i < 2; ++i)
          {
-            if (rps_details.commit_moves.at(i) && 
+            if (rps_details.commit_moves.at(i) &&
                 !rps_details.reveal_moves.at(i)) // if this player has committed but not revealed
             {
                const account_id_type& account_id = game_obj.players[i];
@@ -927,7 +927,7 @@ class wallet_api_impl
                      if (iter != _wallet.committed_game_moves.end())
                      {
                         const rock_paper_scissors_throw_reveal& reveal = iter->second;
-                        
+
                         game_move_operation move_operation;
                         move_operation.game_id = game_obj.id;
                         move_operation.player_account_id = account_id;
@@ -970,7 +970,7 @@ class wallet_api_impl
       }
    } FC_RETHROW_EXCEPTIONS(warn, "") }
 
-   // Cache all matches in the tournament, which will also register us for 
+   // Cache all matches in the tournament, which will also register us for
    // updates on those matches
    void monitor_matches_in_tournament(const tournament_object& tournament_obj)
    { try {
@@ -1127,8 +1127,8 @@ class wallet_api_impl
             dlog( "validated successfully tmp wallet file ${fn}", ("fn", tmp_wallet_filename) );
             fc::rename( tmp_wallet_filename, wallet_filename );
             dlog( "renamed successfully tmp wallet file ${fn}", ("fn", tmp_wallet_filename) );
-         } 
-         else 
+         }
+         else
          {
             FC_THROW("tmp wallet file cannot be validated ${fn}", ("fn", tmp_wallet_filename) );
          }
@@ -1527,7 +1527,7 @@ class wallet_api_impl
 
       return sign_transaction( tx, broadcast );
    } FC_CAPTURE_AND_RETHROW( (issuer)(symbol)(common)(broadcast) ) }
-   
+
    signed_transaction buy_ticket( asset_id_type lottery, account_id_type buyer, uint64_t tickets_to_buy )
    { try {
       auto asset_obj = get_asset( lottery );
@@ -1538,7 +1538,7 @@ class wallet_api_impl
       top.buyer = buyer;
       top.tickets_to_buy = tickets_to_buy;
       top.amount = asset( asset_obj.lottery_options->ticket_price.amount * tickets_to_buy, asset_obj.lottery_options->ticket_price.asset_id );
-      
+
       signed_transaction tx;
       tx.operations.push_back( top );
       set_operation_fees( tx, _remote_db->get_global_properties().parameters.current_fees);
@@ -1546,8 +1546,8 @@ class wallet_api_impl
 
       return sign_transaction( tx, true );
    } FC_CAPTURE_AND_RETHROW( (lottery)(tickets_to_buy) ) }
-   
-   
+
+
    signed_transaction update_asset(string symbol,
                                    optional<string> new_issuer,
                                    asset_options new_options,
@@ -2102,13 +2102,13 @@ class wallet_api_impl
       fc::optional<vesting_balance_id_type> vbid = maybe_id<vesting_balance_id_type>(witness_name);
       if( !vbid )
       {
-         if (is_witness(witness_name)) 
+         if (is_witness(witness_name))
          {
             witness_object wit = get_witness( witness_name );
             FC_ASSERT( wit.pay_vb, "Account ${account} has no core Token ${TOKEN} vested and thus its not allowed to withdraw.", ("account", witness_name)("TOKEN", GRAPHENE_SYMBOL));
             vbid = wit.pay_vb;
          }
-         else 
+         else
             FC_THROW("Account ${account} has no core Token ${TOKEN} vested and thus its not allowed to withdraw.", ("account", witness_name)("TOKEN", GRAPHENE_SYMBOL));
       }
 
@@ -2151,14 +2151,14 @@ class wallet_api_impl
       if( !vbid )
       {
          vbos = _remote_db->get_vesting_balances( account_name );
-         if( vbos.size() == 0 ) 
+         if( vbos.size() == 0 )
             FC_THROW("Account ${account} has no core TOKEN vested and thus its not allowed to withdraw.", ("account", account_name));
       }
 
-      //whether it is a witness or user, keep it in a container and iterate over to process all vesting balances and types 
+      //whether it is a witness or user, keep it in a container and iterate over to process all vesting balances and types
       if(!vbos.size())
          vbos.emplace_back( get_object<vesting_balance_object>(*vbid) );
- 
+
       for (const vesting_balance_object& vesting_balance_obj: vbos) {
          if(vesting_balance_obj.balance_type == vesting_balance_type::gpos)
          {
@@ -2188,7 +2188,7 @@ class wallet_api_impl
                                         bool broadcast /* = false */)
    { try {
       std::vector<vesting_balance_object_with_info> vbo_info = get_vesting_balances(voting_account);
-      
+
       time_point_sec now = time_point::now();
       if(now >= HARDFORK_GPOS_TIME)  //can be removed after GPOS HARDFORK time pass
       {
@@ -2215,7 +2215,7 @@ class wallet_api_impl
             const auto vesting_subperiod = _remote_db->get_global_properties().parameters.gpos_subperiod();
             const auto gpos_start_time = fc::time_point_sec(_remote_db->get_global_properties().parameters.gpos_period_start());
             const auto subperiod_start_time = gpos_start_time.sec_since_epoch() + (gpos_info.current_subperiod - 1) * vesting_subperiod;
-            
+
             if (!insert_result.second && (gpos_info.last_voted_time.sec_since_epoch() >= subperiod_start_time))
                FC_THROW("Account ${account} was already voting for committee_member ${committee_member} in the current GPOS sub-period", ("account", voting_account)("committee_member", committee_member));
             else
@@ -2252,7 +2252,7 @@ class wallet_api_impl
                                        bool broadcast /* = false */)
    { try {
       std::vector<vesting_balance_object_with_info> vbo_info = get_vesting_balances(voting_account);
-      
+
       time_point_sec now = time_point::now();
       if(now >= HARDFORK_GPOS_TIME)  //can be removed after GPOS HARDFORK time pass
       {
@@ -2263,7 +2263,7 @@ class wallet_api_impl
       }
 
       account_object voting_account_object = get_account(voting_account);
-      
+
       fc::optional<witness_object> witness_obj = _remote_db->get_witness_by_account(witness);
       if (!witness_obj)
          FC_THROW("Account ${witness} is not registered as a witness", ("witness", witness));
@@ -2279,7 +2279,7 @@ class wallet_api_impl
             const auto vesting_subperiod = _remote_db->get_global_properties().parameters.gpos_subperiod();
             const auto gpos_start_time = fc::time_point_sec(_remote_db->get_global_properties().parameters.gpos_period_start());
             const auto subperiod_start_time = gpos_start_time.sec_since_epoch() + (gpos_info.current_subperiod - 1) * vesting_subperiod;
-        
+
             if (!insert_result.second && (gpos_info.last_voted_time.sec_since_epoch() >= subperiod_start_time))
                FC_THROW("Account ${account} was already voting for witness ${witness} in the current GPOS sub-period", ("account", voting_account)("witness", witness));
             else
@@ -2297,7 +2297,7 @@ class wallet_api_impl
          if (!votes_removed)
             FC_THROW("Account ${account} has not voted for witness ${witness}", ("account", voting_account)("witness", witness));
       }
-      
+
       account_update_operation account_update_op;
       account_update_op.account = voting_account_object.id;
       account_update_op.new_options = voting_account_object.options;
@@ -2906,7 +2906,7 @@ class wallet_api_impl
                {
                   unsigned row_offset = (1 << round) - 1;
                   unsigned row_vertical_spacing = 1 << (round + 1);
-                  if (row >= row_offset && 
+                  if (row >= row_offset &&
                       (row - row_offset) % row_vertical_spacing == 0)
                   {
                      unsigned player_number_in_round = (row - row_offset) / row_vertical_spacing;
@@ -2920,7 +2920,7 @@ class wallet_api_impl
                      if (round == num_rounds)
                      {
                         match_object match = get_object<match_object>(tournament_details.matches[num_matches - 1]);
-                        if (match.get_state() == match_state::match_complete && 
+                        if (match.get_state() == match_state::match_complete &&
                             !match.match_winners.empty())
                         {
                            assert(match.match_winners.size() == 1);
@@ -3376,6 +3376,38 @@ class wallet_api_impl
       return _remote_db->get_active_custom_account_authorities_by_operation(get_account(owner).id, operation_type);
    }
 
+   vector<uint64_t> get_random_number_ex(string account,
+                                         uint64_t minimum,
+                                         uint64_t maximum,
+                                         uint64_t selections,
+                                         bool duplicates,
+                                         bool broadcast)
+   {
+
+      vector<uint64_t> v = _remote_db->get_random_number_ex(minimum, maximum, selections, duplicates);
+
+      random_number_store_operation op;
+      op.account = get_account(account).id;
+      op.random_number = v;
+      op.data = "";
+
+      signed_transaction trx;
+      trx.operations.push_back(op);
+      set_operation_fees( trx, _remote_db->get_global_properties().parameters.current_fees );
+      trx.validate();
+      sign_transaction( trx, broadcast );
+
+      return v;
+   }
+
+   uint64_t get_random_number(string account,
+                              uint64_t bound,
+                              bool broadcast)
+   {
+      vector<uint64_t> v = get_random_number_ex(account, 0, bound, 1, false, broadcast);
+      return v.at(0);
+   }
+
    void dbg_make_uia(string creator, string symbol)
    {
       asset_options opts;
@@ -3733,7 +3765,7 @@ std::string operation_printer::operator()(const bet_place_operation& op)const
    auto asset = wallet.get_asset(op.amount_to_bet.asset_id);
    auto bettor = wallet.get_account(op.bettor_id);
 
-   out << bettor.name << " placed a " << fc::json::to_string(op.back_or_lay) << " bet for " 
+   out << bettor.name << " placed a " << fc::json::to_string(op.back_or_lay) << " bet for "
        << asset.amount_to_pretty_string(op.amount_to_bet) << " at odds " << ((double)op.backer_multiplier /  GRAPHENE_BETTING_ODDS_PRECISION)
        << " on market " << fc::json::to_string(op.betting_market_id)
        << " fee: " << fee_asset.amount_to_pretty_string(op.fee);
@@ -3876,7 +3908,7 @@ vector<asset_object> wallet_api::get_account_lotteries(  account_id_type issuer,
    return my->_remote_db->get_account_lotteries( issuer, stop, limit, start );
 }
 
-asset wallet_api::get_lottery_balance( asset_id_type lottery_id )const 
+asset wallet_api::get_lottery_balance( asset_id_type lottery_id )const
 {
    return my->_remote_db->get_lottery_balance( lottery_id );
 }
@@ -3884,7 +3916,7 @@ asset wallet_api::get_lottery_balance( asset_id_type lottery_id )const
 vector<operation_detail> wallet_api::get_account_history(string name, int limit) const
 {
    vector<operation_detail> result;
-   
+
    while (limit > 0)
    {
       bool skip_first_row = false;
@@ -3935,9 +3967,9 @@ vector<operation_detail> wallet_api::get_account_history(string name, int limit)
 
 vector<operation_detail> wallet_api::get_relative_account_history(string name, uint32_t stop, int limit, uint32_t start)const
 {
-   
+
    FC_ASSERT( start > 0 || limit <= 100 );
-   
+
    vector<operation_detail> result;
 
    while( limit > 0 )
@@ -4754,6 +4786,23 @@ vector<authority> wallet_api::get_active_custom_account_authorities_by_operation
    return my->get_active_custom_account_authorities_by_operation(owner, operation_type);
 }
 
+vector<uint64_t> wallet_api::get_random_number_ex(string account,
+                                                  uint64_t minimum,
+                                                  uint64_t maximum,
+                                                  uint64_t selections,
+                                                  bool duplicates,
+                                                  bool broadcast)
+{
+   return my->get_random_number_ex( account, minimum, maximum, selections, duplicates, broadcast );
+}
+
+uint64_t wallet_api::get_random_number(string account,
+                                       uint64_t bound,
+                                       bool broadcast)
+{
+   return my->get_random_number( account, bound, broadcast );
+}
+
 global_property_object wallet_api::get_global_properties() const
 {
    return my->get_global_properties();
@@ -5722,22 +5771,22 @@ signed_transaction wallet_api::propose_delete_sport(
 {
     FC_ASSERT( !is_locked() );
     const chain_parameters& current_params = get_global_properties().parameters;
-    
+
     sport_delete_operation sport_delete_op;
     sport_delete_op.sport_id = sport_id;
-    
+
     proposal_create_operation prop_op;
     prop_op.expiration_time = expiration_time;
     prop_op.review_period_seconds = current_params.committee_proposal_review_period;
     prop_op.fee_paying_account = get_account(proposing_account).id;
     prop_op.proposed_ops.emplace_back( sport_delete_op );
     current_params.current_fees->set_fee( prop_op.proposed_ops.back().op );
-    
+
     signed_transaction tx;
     tx.operations.push_back(prop_op);
     my->set_operation_fees(tx, current_params.current_fees);
     tx.validate();
-    
+
     return my->sign_transaction(tx, broadcast);
 }
 
@@ -5800,7 +5849,7 @@ signed_transaction wallet_api::propose_update_event_group(
 
     return my->sign_transaction(tx, broadcast);
 }
-    
+
 signed_transaction wallet_api::propose_delete_event_group(
         const string& proposing_account,
         fc::time_point_sec expiration_time,
@@ -5809,22 +5858,22 @@ signed_transaction wallet_api::propose_delete_event_group(
 {
     FC_ASSERT( !is_locked() );
     const chain_parameters& current_params = get_global_properties().parameters;
-    
+
     event_group_delete_operation event_group_delete_op;
     event_group_delete_op.event_group_id = event_group;
-    
+
     proposal_create_operation prop_op;
     prop_op.expiration_time = expiration_time;
     prop_op.review_period_seconds = current_params.committee_proposal_review_period;
     prop_op.fee_paying_account = get_account(proposing_account).id;
     prop_op.proposed_ops.emplace_back( event_group_delete_op );
     current_params.current_fees->set_fee( prop_op.proposed_ops.back().op );
-    
+
     signed_transaction tx;
     tx.operations.push_back(prop_op);
     my->set_operation_fees(tx, current_params.current_fees);
     tx.validate();
-    
+
     return my->sign_transaction(tx, broadcast);
 }
 
@@ -6209,10 +6258,10 @@ signed_transaction wallet_api::tournament_create( string creator, tournament_opt
    return my->sign_transaction( tx, broadcast );
 }
 
-signed_transaction wallet_api::tournament_join( string payer_account, 
-                                                string player_account, 
-                                                tournament_id_type tournament_id, 
-                                                string buy_in_amount, 
+signed_transaction wallet_api::tournament_join( string payer_account,
+                                                string player_account,
+                                                tournament_id_type tournament_id,
+                                                string buy_in_amount,
                                                 string buy_in_asset_symbol,
                                                 bool broadcast )
 {
@@ -6294,7 +6343,7 @@ signed_transaction wallet_api::rps_throw(game_id_type game_id,
    graphene::chain::game_object game_obj = my->get_object<graphene::chain::game_object>(game_id);
    graphene::chain::match_object match_obj = my->get_object<graphene::chain::match_object>(game_obj.match_id);
    graphene::chain::tournament_object tournament_obj = my->get_object<graphene::chain::tournament_object>(match_obj.tournament_id);
-   graphene::chain::rock_paper_scissors_game_options game_options = 
+   graphene::chain::rock_paper_scissors_game_options game_options =
       tournament_obj.options.game_options.get<graphene::chain::rock_paper_scissors_game_options>();
    if ((int)gesture >= game_options.number_of_gestures)
       FC_THROW("Gesture ${gesture} not supported in this game", ("gesture", gesture));