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core/vm: use types.EmptyCodeHash (#27729)

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ucwong 2023-07-15 16:45:57 +01:00 committed by GitHub
parent d233b6b23a
commit 99e000cb13
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2 changed files with 3 additions and 6 deletions
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7
core/vm/evm.go
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@ -21,15 +21,12 @@ import (
"sync/atomic"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/params"
"github.com/holiman/uint256"
)
// emptyCodeHash is used by create to ensure deployment is disallowed to already
// deployed contract addresses (relevant after the account abstraction).
var emptyCodeHash = crypto.Keccak256Hash(nil)
type (
// CanTransferFunc is the signature of a transfer guard function
CanTransferFunc func(StateDB, common.Address, *big.Int) bool
@ -438,7 +435,7 @@ func (evm *EVM) create(caller ContractRef, codeAndHash *codeAndHash, gas uint64,
}
// Ensure there's no existing contract already at the designated address
contractHash := evm.StateDB.GetCodeHash(address)
if evm.StateDB.GetNonce(address) != 0 || (contractHash != (common.Hash{}) && contractHash != emptyCodeHash) {
if evm.StateDB.GetNonce(address) != 0 || (contractHash != (common.Hash{}) && contractHash != types.EmptyCodeHash) {
return nil, common.Address{}, 0, ErrContractAddressCollision
}
// Create a new account on the state

2
core/vm/instructions_test.go
View File

@ -725,7 +725,7 @@ func TestRandom(t *testing.T) {
for _, tt := range []testcase{
{name: "empty hash", random: common.Hash{}},
{name: "1", random: common.Hash{0}},
{name: "emptyCodeHash", random: emptyCodeHash},
{name: "emptyCodeHash", random: types.EmptyCodeHash},
{name: "hash(0x010203)", random: crypto.Keccak256Hash([]byte{0x01, 0x02, 0x03})},
} {
var (