What is SoftFork 0.22.2? A dive into the code

SoftFork 0.22.2 confused me as much as it probably did the rest of you, I slept through the fork and so I was very confused, let's take a look into the code:

/ If the time of the current block is more than the target SoftFork time /

if ( fc::time_point_sec( STEEM_PROTECTION_HARDFORK_TIME ) <= head_block_time() ) 
   { 

Based on the kind of operation, block it if it's from a STEEMIT, Inc owned account and:

      switch( op.which() ) 
      { 

It's a witness vote or proxy

         case operation::tag<account_witness_proxy_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< account_witness_proxy_operation >().account ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 
         case operation::tag<account_witness_vote_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< account_witness_vote_operation >().account ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 
         case  

It's a proposal vote

operation::tag<update_proposal_votes_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< update_proposal_votes_operation >().voter ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 

It's a post vote

         case operation::tag<vote_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< vote_operation >().voter ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 

It's a powerdown (you can powerdown to other accounts)

         case operation::tag<withdraw_vesting_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< withdraw_vesting_operation >().account ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 

Trying to set powerdown route (account to powerdown to)

         case operation::tag<set_withdraw_vesting_route_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< set_withdraw_vesting_route_operation >().from_account ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 

Trying to do a plain-old transfer

         case operation::tag<transfer_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< transfer_operation >().from ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 

Trying to make a market order

         case operation::tag<limit_order_create_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< limit_order_create_operation >().owner ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 
         case operation::tag<limit_order_create2_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< limit_order_create2_operation >().owner ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 

Powering up

         case operation::tag<transfer_to_vesting_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< transfer_to_vesting_operation >().from ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 

Sending to savings

         case operation::tag<transfer_to_savings_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< transfer_to_savings_operation >().from ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 

Using inbuilt escrow function of the chain to make a transfer

         case operation::tag<escrow_transfer_operation>::value: 
            if ( hardforkprotect::get_steemit_accounts().count( op.get< escrow_transfer_operation >().from ) ) 
               FC_THROW_EXCEPTION(transaction_exception, "Error when pushing TX:\nReason: TX has been rejected."); 
            break; 

For any other transaction, allow (so long as all the other requirements are ok)

         default: 
            break; 
      } 
   } 

Hope this helps you to understand, ~ @CADawg