You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
100 lines
3.6 KiB
100 lines
3.6 KiB
/*
|
|
This file is part of cpp-ethereum.
|
|
|
|
cpp-ethereum is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
cpp-ethereum is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/** @file ExtVM.h
|
|
* @author Gav Wood <i@gavwood.com>
|
|
* @date 2014
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <map>
|
|
#include <functional>
|
|
#include <libethcore/CommonEth.h>
|
|
#include <libevm/ExtVMFace.h>
|
|
#include "State.h"
|
|
|
|
namespace dev
|
|
{
|
|
namespace eth
|
|
{
|
|
|
|
/**
|
|
* @brief Externality interface for the Virtual Machine providing access to world state.
|
|
*/
|
|
class ExtVM: public ExtVMFace
|
|
{
|
|
public:
|
|
/// Full constructor.
|
|
ExtVM(State& _s, Address _myAddress, Address _caller, Address _origin, u256 _value, u256 _gasPrice, bytesConstRef _data, bytesConstRef _code, unsigned _depth = 0):
|
|
ExtVMFace(_myAddress, _caller, _origin, _value, _gasPrice, _data, _code.toBytes(), _s.m_previousBlock, _s.m_currentBlock, _depth), m_s(_s), m_origCache(_s.m_cache)
|
|
{
|
|
m_s.ensureCached(_myAddress, true, true);
|
|
}
|
|
|
|
/// Read storage location.
|
|
virtual u256 store(u256 _n) override final { return m_s.storage(myAddress, _n); }
|
|
|
|
/// Write a value in storage.
|
|
virtual void setStore(u256 _n, u256 _v) override final { m_s.setStorage(myAddress, _n, _v); }
|
|
|
|
/// Read address's code.
|
|
virtual bytes const& codeAt(Address _a) override final { return m_s.code(_a); }
|
|
|
|
/// Create a new contract.
|
|
virtual h160 create(u256 _endowment, u256* _gas, bytesConstRef _code, OnOpFunc const& _onOp = OnOpFunc()) override final
|
|
{
|
|
// Increment associated nonce for sender.
|
|
m_s.noteSending(myAddress);
|
|
return m_s.create(myAddress, _endowment, gasPrice, _gas, _code, origin, &sub, _onOp, depth + 1);
|
|
}
|
|
|
|
/// Create a new message call. Leave _myAddressOverride as the default to use the present address as caller.
|
|
virtual bool call(Address _receiveAddress, u256 _txValue, bytesConstRef _txData, u256* _gas, bytesRef _out, OnOpFunc const& _onOp = {}, Address _myAddressOverride = {}, Address _codeAddressOverride = {}) override final
|
|
{
|
|
return m_s.call(_receiveAddress, _codeAddressOverride ? _codeAddressOverride : _receiveAddress, _myAddressOverride ? _myAddressOverride : myAddress, _txValue, gasPrice, _txData, _gas, _out, origin, &sub, _onOp, depth + 1);
|
|
}
|
|
|
|
/// Read address's balance.
|
|
virtual u256 balance(Address _a) override final { return m_s.balance(_a); }
|
|
|
|
/// Subtract amount from account's balance.
|
|
virtual void subBalance(u256 _a) override final { m_s.subBalance(myAddress, _a); }
|
|
|
|
/// Determine account's TX count.
|
|
virtual u256 txCount(Address _a) override final { return m_s.transactionsFrom(_a); }
|
|
|
|
/// Suicide the associated contract to the given address.
|
|
virtual void suicide(Address _a) override final
|
|
{
|
|
m_s.addBalance(_a, m_s.balance(myAddress));
|
|
ExtVMFace::suicide(_a);
|
|
}
|
|
|
|
/// Revert any changes made (by any of the other calls).
|
|
/// @TODO check call site for the parent manifest being discarded.
|
|
virtual void revert() override final { m_s.m_cache = m_origCache; }
|
|
|
|
State& state() const { return m_s; }
|
|
|
|
private:
|
|
State& m_s; ///< A reference to the base state.
|
|
std::map<Address, Account> m_origCache; ///< The cache of the address states (i.e. the externalities) as-was prior to the execution.
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
|