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82 lines
2.6 KiB
82 lines
2.6 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file ExtVMFace.h
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#pragma once
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#include <libethsupport/Common.h>
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#include <libethcore/CommonEth.h>
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#include <libethcore/BlockInfo.h>
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namespace eth
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{
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/**
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* @brief A null implementation of the class for specifying VM externalities.
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*/
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class ExtVMFace
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{
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public:
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/// Null constructor.
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ExtVMFace() {}
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/// Full constructor.
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ExtVMFace(Address _myAddress, Address _caller, Address _origin, u256 _value, u256 _gasPrice, bytesConstRef _data, bytesConstRef _code, BlockInfo const& _previousBlock, BlockInfo const& _currentBlock);
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/// Get the code at the given location in code ROM.
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byte getCode(u256 _n) const { return _n < code.size() ? code[(unsigned)_n] : 0; }
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/// Read storage location.
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u256 store(u256) { return 0; }
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/// Write a value in storage.
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void setStore(u256, u256) {}
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/// Read address's balance.
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u256 balance(Address) { return 0; }
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/// Subtract amount from address's balance.
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void subBalance(u256) {}
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/// Determine address's TX count.
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u256 txCount(Address) { return 0; }
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/// Suicide the associated contract to the given address.
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void suicide(Address) {}
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/// Create a new contract.
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h160 create(u256, u256*, bytesConstRef, bytesConstRef) { return h160(); }
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/// Make a new message call.
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bool call(Address, u256, bytesConstRef, u256*, bytesRef) { return false; }
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Address myAddress; ///< Address associated with executing code (a contract, or contract-to-be).
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Address caller; ///< Address which sent the message (either equal to origin or a contract).
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Address origin; ///< Original transactor.
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u256 value; ///< Value (in Wei) that was passed to this address.
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u256 gasPrice; ///< Price of gas (that we already paid).
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bytesConstRef data; ///< Current input data.
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bytesConstRef code; ///< Current code that is executing.
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BlockInfo previousBlock; ///< The previous block's information.
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BlockInfo currentBlock; ///< The current block's information.
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};
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}
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