plugeth/core/vm/environment.go

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package vm
import (
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"errors"
"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
)
type Environment interface {
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State() *state.StateDB
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Origin() common.Address
BlockNumber() *big.Int
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GetHash(n uint64) common.Hash
Coinbase() common.Address
Time() int64
Difficulty() *big.Int
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GasLimit() *big.Int
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Transfer(from, to Account, amount *big.Int) error
AddLog(*state.Log)
AddStructLog(StructLog)
StructLogs() []StructLog
VmType() Type
Depth() int
SetDepth(i int)
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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)
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Create(me ContextRef, data []byte, gas, price, value *big.Int) ([]byte, error, ContextRef)
}
type StructLog struct {
Pc uint64
Op OpCode
Gas *big.Int
Memory []byte
Stack []*big.Int
Storage map[common.Hash][]byte
}
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type Account interface {
SubBalance(amount *big.Int)
AddBalance(amount *big.Int)
Balance() *big.Int
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Address() common.Address
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}
// 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
}