diff --git a/libraries/chain/include/steemit/chain/config.hpp b/libraries/chain/include/steemit/chain/config.hpp
index 771561060f..2a56c0468a 100644
--- a/libraries/chain/include/steemit/chain/config.hpp
+++ b/libraries/chain/include/steemit/chain/config.hpp
@@ -3,7 +3,7 @@
  */
 #pragma once
 
-#define STEEMIT_BLOCKCHAIN_VERSION              ( version(0, 10, 0) )
+#define STEEMIT_BLOCKCHAIN_VERSION              ( version(0, 10, 1) )
 #define STEEMIT_BLOCKCHAIN_HARDFORK_VERSION     ( hardfork_version( STEEMIT_BLOCKCHAIN_VERSION ) )
 
 #ifdef IS_TEST_NET
diff --git a/libraries/chain/steem_evaluator.cpp b/libraries/chain/steem_evaluator.cpp
index 024f565f45..663116ed1c 100644
--- a/libraries/chain/steem_evaluator.cpp
+++ b/libraries/chain/steem_evaluator.cpp
@@ -149,6 +149,8 @@ void account_update_evaluator::do_apply( const account_update_operation& o )
  *  Because net_rshares is 0 there is no need to update any pending payout calculations or parent posts.
  */
 void delete_comment_evaluator::do_apply( const delete_comment_operation& o ) {
+   FC_ASSERT( !db().is_producing() );
+
    if( db().has_hardfork( STEEMIT_HARDFORK_0_10 ) )
    {
       const auto& auth = db().get_account( o.author );
@@ -205,6 +207,8 @@ void delete_comment_evaluator::do_apply( const delete_comment_operation& o ) {
 
 void comment_options_evaluator::do_apply( const comment_options_operation& o )
 {
+   FC_ASSERT( !db().is_producing() );
+
    if( db().has_hardfork( STEEMIT_HARDFORK_0_10 ) )
    {
       const auto& auth = db().get_account( o.author );
@@ -230,7 +234,10 @@ void comment_options_evaluator::do_apply( const comment_options_operation& o )
    });
 }
 void comment_evaluator::do_apply( const comment_operation& o )
-{ try {
+{
+   FC_ASSERT( !db().is_producing() );
+
+   try {
    if( db().is_producing() || db().has_hardfork( STEEMIT_HARDFORK_0_5__55 ) )
       FC_ASSERT( o.title.size() + o.body.size() + o.json_metadata.size(), "something should change" );
 
@@ -773,7 +780,9 @@ void account_witness_vote_evaluator::do_apply( const account_witness_vote_operat
 }
 
 void vote_evaluator::do_apply( const vote_operation& o )
-{ try {
+{
+   FC_ASSERT( !db().is_producing() );
+   try {
 
    const auto& comment = db().get_comment( o.author, o.permlink );
    const auto& voter   = db().get_account( o.voter );
@@ -1037,10 +1046,14 @@ void vote_evaluator::do_apply( const vote_operation& o )
 
 } FC_CAPTURE_AND_RETHROW( (o)) }
 
-void custom_evaluator::do_apply( const custom_operation& o ){}
+void custom_evaluator::do_apply( const custom_operation& o )
+{
+   FC_ASSERT( !db().is_producing() );
+}
 
 void custom_json_evaluator::do_apply( const custom_json_operation& o )
 {
+   FC_ASSERT( !db().is_producing() );
    FC_ASSERT( db().has_hardfork( STEEMIT_HARDFORK_0_5 ) );
    if( db().has_hardfork( STEEMIT_HARDFORK_0_10 ) )
    {
diff --git a/libraries/wallet/include/steemit/wallet/wallet.hpp b/libraries/wallet/include/steemit/wallet/wallet.hpp
index 3c7d951be4..2837191b19 100644
--- a/libraries/wallet/include/steemit/wallet/wallet.hpp
+++ b/libraries/wallet/include/steemit/wallet/wallet.hpp
@@ -707,6 +707,25 @@ class wallet_api
        */
       annotated_signed_transaction vote( string voter, string author, string permlink, int16_t weight, bool broadcast );
 
+      /**
+       * Challenge a user's authority. The challenger pays a fee to the challenged which is depositted as
+       * Steem Power. Until the challenged proves their active key, all posting rights are revoked.
+       *
+       * @param challenger The account issuing the challenge
+       * @param challenged The account being challenged
+       * @param broadcast true if you wish to broadcast the transaction
+       */
+      annotated_signed_transaction challenge( string challenger, string challenged, bool broadcast );
+
+      /**
+       * Prove an account's active authority, fulfilling a challenge, restoring posting rights, and making
+       * the account immune to challenge for 24 hours.
+       *
+       * @param challenged The account that was challenged and is proving its authority.
+       * @param broadcast true if you wish to broadcast the transaction
+       */
+      annotated_signed_transaction prove( string challenged, bool broadcast );
+
       /**
        *  Account operations have sequence numbers from 0 to N where N is the most recent operation. This method
        *  returns operations in the range [from-limit, from]
@@ -809,6 +828,8 @@ FC_API( steemit::wallet::wallet_api,
         (cancel_order)
         (post_comment)
         (vote)
+        (challenge)
+        (prove)
 
         // private message api
         (send_private_message)
diff --git a/libraries/wallet/wallet.cpp b/libraries/wallet/wallet.cpp
index d8ccbaa347..c9ff4de5aa 100644
--- a/libraries/wallet/wallet.cpp
+++ b/libraries/wallet/wallet.cpp
@@ -1795,6 +1795,39 @@ annotated_signed_transaction wallet_api::vote( string voter, string author, stri
 
    return my->sign_transaction( tx, broadcast );
 }
+
+annotated_signed_transaction wallet_api::challenge( string challenger, string challenged, bool broadcast )
+{
+   FC_ASSERT( !is_locked() );
+
+   challenge_authority_operation op;
+   op.challenger = challenger;
+   op.challenged = challenged;
+   op.require_owner = false;
+
+   signed_transaction tx;
+   tx.operations.push_back( op );
+   tx.validate();
+
+   return my->sign_transaction( tx, broadcast );
+}
+
+annotated_signed_transaction wallet_api::prove( string challenged, bool broadcast )
+{
+   FC_ASSERT( !is_locked() );
+
+   prove_authority_operation op;
+   op.challenged = challenged;
+   op.require_owner = false;
+
+   signed_transaction tx;
+   tx.operations.push_back( op );
+   tx.validate();
+
+   return my->sign_transaction( tx, broadcast );
+}
+
+
 annotated_signed_transaction wallet_api::get_transaction( transaction_id_type id )const {
    return my->_remote_db->get_transaction( id );
 }
diff --git a/tests/tests/operation_time_tests.cpp b/tests/tests/operation_time_tests.cpp
index 3ef0a2e14a..b171f845c6 100644
--- a/tests/tests/operation_time_tests.cpp
+++ b/tests/tests/operation_time_tests.cpp
@@ -1602,7 +1602,7 @@ BOOST_AUTO_TEST_CASE( liquidity_rewards )
 
       BOOST_TEST_MESSAGE( "Waiting 10 minutes" );
 
-      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF9, true );
+      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF10, true );
 
       BOOST_TEST_MESSAGE( "Creating Limit Order for SBD that will be filled immediately." );
 
@@ -1669,7 +1669,7 @@ BOOST_AUTO_TEST_CASE( liquidity_rewards )
 
       BOOST_TEST_MESSAGE( "Waiting 10 minutes" );
 
-      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF9, true );
+      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF10, true );
 
       BOOST_TEST_MESSAGE( "Creating Limit Order for SBD that will stay on the books for 30 minutes." );
 
@@ -1687,7 +1687,7 @@ BOOST_AUTO_TEST_CASE( liquidity_rewards )
 
       BOOST_TEST_MESSAGE( "Waiting 30 minutes" );
 
-      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF9, true );
+      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF10, true );
 
       BOOST_TEST_MESSAGE( "Filling both limit orders." );
 
@@ -1761,7 +1761,7 @@ BOOST_AUTO_TEST_CASE( liquidity_rewards )
       tx.sign( alice_private_key, db.get_chain_id() );
       db.push_transaction( tx, 0 );
 
-      generate_blocks( db.head_block_time() + fc::seconds( STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF9.to_seconds() / 2 ), true );
+      generate_blocks( db.head_block_time() + fc::seconds( STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF10.to_seconds() / 2 ), true );
 
       op.owner = "bob";
       op.orderid = 7;
@@ -1775,7 +1775,7 @@ BOOST_AUTO_TEST_CASE( liquidity_rewards )
       tx.sign( bob_private_key, db.get_chain_id() );
       db.push_transaction( tx, 0 );
 
-      generate_blocks( db.head_block_time() + fc::seconds( STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF9.to_seconds() / 2 ), true );
+      generate_blocks( db.head_block_time() + fc::seconds( STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF10.to_seconds() / 2 ), true );
 
       ops = get_last_operations( 1 );
       fill_order_op = ops[0].get< fill_order_operation >();
@@ -1808,7 +1808,7 @@ BOOST_AUTO_TEST_CASE( liquidity_rewards )
       BOOST_CHECK_EQUAL( reward->steem_volume, sam_steem_volume );
       BOOST_CHECK( reward->last_update == sam_reward_last_update );
 
-      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF9, true );
+      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF10, true );
 
       op.owner = "sam";
       op.orderid = 8;
@@ -1880,7 +1880,7 @@ BOOST_AUTO_TEST_CASE( liquidity_rewards )
       tx.sign( alice_private_key, db.get_chain_id() );
       db.push_transaction( tx, 0 );
 
-      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF9, true );
+      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF10, true );
 
       op.owner = "dave";
       op.amount_to_sell = asset( 7 * ( alice_sbd.amount.value / 20 ), SBD_SYMBOL );;
@@ -2009,7 +2009,7 @@ BOOST_AUTO_TEST_CASE( liquidity_rewards )
       tx.sign( bob_private_key, db.get_chain_id() );
       db.push_transaction( tx, 0 );
 
-      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF9, true );
+      generate_blocks( db.head_block_time() + STEEMIT_MIN_LIQUIDITY_REWARD_PERIOD_SEC_HF10, true );
 
       op.owner = "dave";
       op.orderid = 13;