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package vm
import (
"errors"
"math/big"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/state"
)
type Environment interface {
State() *state.State
Origin() []byte
BlockNumber() *big.Int
PrevHash() []byte
Coinbase() []byte
Time() int64
Difficulty() *big.Int
BlockHash() []byte
GasLimit() *big.Int
Transfer(from, to Account, amount *big.Int) error
AddLog(*state.Log)
Depth() int
SetDepth(i int)
Call(me ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error)
CallCode(me ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error)
Create(me ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, ClosureRef)
}
type Object interface {
GetStorage(key *big.Int) *ethutil.Value
SetStorage(key *big.Int, value *ethutil.Value)
}
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
}
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