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package vm
import (
"errors"
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/state"
)
type Environment interface {
State() *state.StateDB
Origin() []byte
BlockNumber() *big.Int
GetHash(n uint64) []byte
Coinbase() []byte
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, data []byte, gas, price, value *big.Int) ([]byte, error)
CallCode(me ContextRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error)
Create(me ContextRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, ContextRef)
}
type Account interface {
SubBalance(amount *big.Int)
AddBalance(amount *big.Int)
Balance() *big.Int
}
// 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 []byte
topics [][]byte
data []byte
log uint64
}
func (self *Log) Address() []byte {
return self.address
}
func (self *Log) Topics() [][]byte {
return self.topics
}
func (self *Log) Data() []byte {
return self.data
}
func (self *Log) Number() uint64 {
return self.log
}
func (self *Log) RlpData() interface{} {
return []interface{}{self.address, ethutil.ByteSliceToInterface(self.topics), self.data}
}
func (self *Log) String() string {
return fmt.Sprintf("[A=%x T=%x D=%x]", self.address, self.topics, self.data)
}
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