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Merge pull request #17982 from holiman/polish_contantinople_extcodehash

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core/vm: check empty in extcodehash
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Péter Szilágyi 2018-11-08 14:26:04 +02:00 committed by GitHub
commit d0675e9d9c
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1 changed files with 6 additions and 1 deletions
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7
core/vm/instructions.go
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@ -544,7 +544,12 @@ func opExtCodeCopy(pc *uint64, interpreter *EVMInterpreter, contract *Contract,
// this account should be regarded as a non-existent account and zero should be returned.
func opExtCodeHash(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
slot := stack.peek()
slot.SetBytes(interpreter.evm.StateDB.GetCodeHash(common.BigToAddress(slot)).Bytes())
address := common.BigToAddress(slot)
if interpreter.evm.StateDB.Empty(address) {
slot.SetUint64(0)
} else {
slot.SetBytes(interpreter.evm.StateDB.GetCodeHash(address).Bytes())
}
return nil, nil
}