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package vm
import (
"errors"
"fmt"
"io"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/rlp"
)
type Environment interface {
State() *state.StateDB
Origin() common.Address
BlockNumber() *big.Int
GetHash(n uint64) common.Hash
Coinbase() common.Address
Time() int64
Difficulty() *big.Int
GasLimit() *big.Int
Transfer(from, to Account, amount *big.Int) error
AddLog(*state.Log)
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)
}
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
}
type Log struct {
address common.Address
topics []common.Hash
data []byte
log uint64
}
func (self *Log) Address() common.Address {
return self.address
}
func (self *Log) Topics() []common.Hash {
return self.topics
}
func (self *Log) Data() []byte {
return self.data
}
func (self *Log) Number() uint64 {
return self.log
}
func (self *Log) EncodeRLP(w io.Writer) error {
return rlp.Encode(w, []interface{}{self.address, self.topics, self.data})
}
/*
func (self *Log) RlpData() interface{} {
return []interface{}{self.address, common.ByteSliceToInterface(self.topics), self.data}
}
*/
func (self *Log) String() string {
return fmt.Sprintf("{%x %x %x}", self.address, self.data, self.topics)
}
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