witness_evaluator.cpp

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/*
 * Copyright (c) 2015 Cryptonomex, Inc., and contributors.
 *
 * The MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#include <graphene/chain/witness_evaluator.hpp>
#include <graphene/chain/witness_object.hpp>
#include <graphene/chain/committee_member_object.hpp>
#include <graphene/chain/account_object.hpp>
#include <graphene/chain/database.hpp>
#include <graphene/protocol/vote.hpp>
 
namespace graphene { namespace chain {
 
void_result witness_create_evaluator::do_evaluate( const witness_create_operation& op )
{ try {
   FC_ASSERT(db().get(op.witness_account).is_lifetime_member());
   return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }
 
object_id_type witness_create_evaluator::do_apply( const witness_create_operation& op )
{ try {
   database& _db = db();
   vote_id_type vote_id;
   _db.modify( _db.get_global_properties(), [&vote_id](global_property_object& p) {
      vote_id = vote_id_type(vote_id_type::witness, p.next_available_vote_id++);
   });
 
   const auto& new_witness_object = _db.create<witness_object>( [&op,&vote_id]( witness_object& obj ){
         obj.witness_account  = op.witness_account;
         obj.signing_key      = op.block_signing_key;
         obj.vote_id          = vote_id;
         obj.url              = op.url;
   });
   return new_witness_object.id;
} FC_CAPTURE_AND_RETHROW( (op) ) }
 
void_result witness_update_evaluator::do_evaluate( const witness_update_operation& op )
{ try {
   FC_ASSERT(db().get(op.witness).witness_account == op.witness_account);
   return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }
 
void_result witness_update_evaluator::do_apply( const witness_update_operation& op )
{ try {
   database& _db = db();
   _db.modify(
      _db.get(op.witness),
      [&op]( witness_object& wit )
      {
         if( op.new_url.valid() )
            wit.url = *op.new_url;
         if( op.new_signing_key.valid() )
            wit.signing_key = *op.new_signing_key;
      });
   return void_result();
} FC_CAPTURE_AND_RETHROW( (op) ) }
 
} } // graphene::chain