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/*
This file is part of go-ethereum
go-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.
go-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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @authors
* Jeffrey Wilcke <i@jev.io>
*/
package utils
import (
"math/big"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/state"
"github.com/ethereum/go-ethereum/vm"
)
type VMEnv struct {
chain *core.ChainManager
state *state.StateDB
block *types.Block
transactor []byte
value *big.Int
depth int
Gas *big.Int
}
func NewEnv(chain *core.ChainManager, state *state.StateDB, block *types.Block, transactor []byte, value *big.Int) *VMEnv {
return &VMEnv{
chain: chain,
state: state,
block: block,
transactor: transactor,
value: value,
}
}
func (self *VMEnv) Origin() []byte { return self.transactor }
func (self *VMEnv) BlockNumber() *big.Int { return self.block.Number() }
func (self *VMEnv) PrevHash() []byte { return self.block.ParentHash() }
func (self *VMEnv) Coinbase() []byte { return self.block.Coinbase() }
func (self *VMEnv) Time() int64 { return self.block.Time() }
func (self *VMEnv) Difficulty() *big.Int { return self.block.Difficulty() }
func (self *VMEnv) GasLimit() *big.Int { return self.block.GasLimit() }
func (self *VMEnv) Value() *big.Int { return self.value }
func (self *VMEnv) State() *state.StateDB { return self.state }
func (self *VMEnv) Depth() int { return self.depth }
func (self *VMEnv) SetDepth(i int) { self.depth = i }
func (self *VMEnv) GetHash(n uint64) []byte {
if block := self.chain.GetBlockByNumber(n); block != nil {
return block.Hash()
}
return nil
}
func (self *VMEnv) AddLog(log state.Log) {
self.state.AddLog(log)
}
func (self *VMEnv) Transfer(from, to vm.Account, amount *big.Int) error {
return vm.Transfer(from, to, amount)
}
func (self *VMEnv) vm(addr, data []byte, gas, price, value *big.Int) *core.Execution {
return core.NewExecution(self, addr, data, gas, price, value)
}
func (self *VMEnv) Call(caller vm.ContextRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
exe := self.vm(addr, data, gas, price, value)
ret, err := exe.Call(addr, caller)
self.Gas = exe.Gas
return ret, err
}
func (self *VMEnv) CallCode(caller vm.ContextRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
exe := self.vm(caller.Address(), data, gas, price, value)
return exe.Call(addr, caller)
}
func (self *VMEnv) Create(caller vm.ContextRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, vm.ContextRef) {
exe := self.vm(addr, data, gas, price, value)
return exe.Create(caller)
}
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