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46 lines
865 B
46 lines
865 B
package vm
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import (
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"errors"
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"math/big"
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"github.com/ethereum/go-ethereum/ethstate"
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"github.com/ethereum/go-ethereum/ethutil"
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)
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type Environment interface {
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State() *ethstate.State
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Origin() []byte
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BlockNumber() *big.Int
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PrevHash() []byte
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Coinbase() []byte
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Time() int64
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Difficulty() *big.Int
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BlockHash() []byte
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GasLimit() *big.Int
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Transfer(from, to Account, amount *big.Int) error
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}
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type Object interface {
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GetStorage(key *big.Int) *ethutil.Value
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SetStorage(key *big.Int, value *ethutil.Value)
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}
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type Account interface {
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SubBalance(amount *big.Int)
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AddBalance(amount *big.Int)
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Balance() *big.Int
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}
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// generic transfer method
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func Transfer(from, to Account, amount *big.Int) error {
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if from.Balance().Cmp(amount) < 0 {
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return errors.New("Insufficient balance in account")
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}
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from.SubBalance(amount)
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to.AddBalance(amount)
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return nil
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}
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