forked from cerc-io/plugeth
3f047be5aa
All code outside of cmd/ is licensed as LGPL. The headers now reflect this by calling the whole work "the go-ethereum library".
85 lines
2.4 KiB
Go
85 lines
2.4 KiB
Go
// Copyright 2014 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// go-ethereum is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library 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 Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package vm
|
|
|
|
import (
|
|
"errors"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/state"
|
|
)
|
|
|
|
// Environment is is required by the virtual machine to get information from
|
|
// it's own isolated environment. For an example see `core.VMEnv`
|
|
type Environment interface {
|
|
State() *state.StateDB
|
|
|
|
Origin() common.Address
|
|
BlockNumber() *big.Int
|
|
GetHash(n uint64) common.Hash
|
|
Coinbase() common.Address
|
|
Time() uint64
|
|
Difficulty() *big.Int
|
|
GasLimit() *big.Int
|
|
Transfer(from, to Account, amount *big.Int) error
|
|
AddLog(*state.Log)
|
|
AddStructLog(StructLog)
|
|
StructLogs() []StructLog
|
|
|
|
VmType() Type
|
|
|
|
Depth() int
|
|
SetDepth(i int)
|
|
|
|
Call(me ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error)
|
|
CallCode(me ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error)
|
|
Create(me ContextRef, data []byte, gas, price, value *big.Int) ([]byte, error, ContextRef)
|
|
}
|
|
|
|
// StructLog is emited to the Environment each cycle and lists information about the curent internal state
|
|
// prior to the execution of the statement.
|
|
type StructLog struct {
|
|
Pc uint64
|
|
Op OpCode
|
|
Gas *big.Int
|
|
GasCost *big.Int
|
|
Memory []byte
|
|
Stack []*big.Int
|
|
Storage map[common.Hash][]byte
|
|
Err error
|
|
}
|
|
|
|
type Account interface {
|
|
SubBalance(amount *big.Int)
|
|
AddBalance(amount *big.Int)
|
|
Balance() *big.Int
|
|
Address() common.Address
|
|
}
|
|
|
|
// generic transfer method
|
|
func Transfer(from, to Account, amount *big.Int) error {
|
|
if from.Balance().Cmp(amount) < 0 {
|
|
return errors.New("Insufficient balance in account")
|
|
}
|
|
|
|
from.SubBalance(amount)
|
|
to.AddBalance(amount)
|
|
|
|
return nil
|
|
}
|