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refactor SimpleWorld to use Optional for storing accounts and extra null checks (#7532)

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Signed-off-by: Luis Pinto <luis.pinto@consensys.net>
pull/7558/head
Luis Pinto 3 months ago committed by GitHub
parent e1dd400aa5
commit 4c4f2f3362
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3 changed files with 357 additions and 38 deletions
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  1. 17
      evm/src/main/java/org/hyperledger/besu/evm/fluent/SimpleAccount.java
  2. 35
      evm/src/main/java/org/hyperledger/besu/evm/fluent/SimpleWorld.java
  3. 331
      evm/src/test/java/org/hyperledger/besu/evm/fluent/SimpleWorldTest.java

17
evm/src/main/java/org/hyperledger/besu/evm/fluent/SimpleAccount.java
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@ -214,21 +214,4 @@ public class SimpleAccount implements MutableAccount {
return false;
}
}
/**
* Push changes into the parent account, if one exists
*
* @return true if a parent account was updated, false if not (this indicates the account should
* be inserted into the parent contact).
*/
public boolean updateParent() {
if (parent instanceof SimpleAccount simpleAccount) {
simpleAccount.balance = balance;
simpleAccount.nonce = nonce;
simpleAccount.storage.putAll(storage);
return true;
} else {
return false;
}
}
}

35
evm/src/main/java/org/hyperledger/besu/evm/fluent/SimpleWorld.java
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@ -29,10 +29,10 @@ import java.util.Optional;
public class SimpleWorld implements WorldUpdater {
/** The Parent. */
SimpleWorld parent;
private final SimpleWorld parent;
/** The Accounts. */
Map<Address, SimpleAccount> accounts = new HashMap<>();
private Map<Address, Optional<SimpleAccount>> accounts = new HashMap<>();
/** Instantiates a new Simple world. */
public SimpleWorld() {
@ -55,13 +55,15 @@ public class SimpleWorld implements WorldUpdater {
@Override
public Account get(final Address address) {
Optional<SimpleAccount> account = Optional.empty();
if (accounts.containsKey(address)) {
return accounts.get(address);
account = accounts.get(address);
} else if (parent != null) {
return parent.get(address);
} else {
return null;
if (parent.get(address) instanceof SimpleAccount accountFromParent) {
account = Optional.of(accountFromParent);
}
}
return account.orElse(null);
}
@Override
@ -70,45 +72,46 @@ public class SimpleWorld implements WorldUpdater {
throw new IllegalStateException("Cannot create an account when one already exists");
}
SimpleAccount account = new SimpleAccount(address, nonce, balance);
accounts.put(address, account);
accounts.put(address, Optional.of(account));
return account;
}
@Override
public MutableAccount getAccount(final Address address) {
SimpleAccount account = accounts.get(address);
Optional<SimpleAccount> account = accounts.get(address);
if (account != null) {
return account;
return account.orElse(null);
}
Account parentAccount = parent == null ? null : parent.getAccount(address);
if (parentAccount != null) {
account =
Optional.of(
new SimpleAccount(
parentAccount,
parentAccount.getAddress(),
parentAccount.getNonce(),
parentAccount.getBalance(),
parentAccount.getCode());
parentAccount.getCode()));
accounts.put(address, account);
return account;
return account.get();
}
return null;
}
@Override
public void deleteAccount(final Address address) {
accounts.put(address, null);
accounts.put(address, Optional.empty());
}
@Override
public Collection<? extends Account> getTouchedAccounts() {
return accounts.values();
return accounts.values().stream().filter(Optional::isPresent).map(Optional::get).toList();
}
@Override
public Collection<Address> getDeletedAccountAddresses() {
return accounts.entrySet().stream()
.filter(e -> e.getValue() == null)
.filter(e -> e.getValue().isEmpty())
.map(Map.Entry::getKey)
.toList();
}
@ -122,9 +125,11 @@ public class SimpleWorld implements WorldUpdater {
public void commit() {
accounts.forEach(
(address, account) -> {
if (!account.updateParent()) {
if (account.isEmpty() || !account.get().commit()) {
if (parent != null) {
parent.accounts.put(address, account);
}
}
});
}

331
evm/src/test/java/org/hyperledger/besu/evm/fluent/SimpleWorldTest.java
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@ -0,0 +1,331 @@
/*
* Copyright contributors to Hyperledger Besu.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
*/
package org.hyperledger.besu.evm.fluent;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import org.hyperledger.besu.datatypes.Address;
import org.hyperledger.besu.evm.account.Account;
import org.hyperledger.besu.evm.account.MutableAccount;
import org.hyperledger.besu.evm.worldstate.WorldUpdater;
import org.apache.tuweni.units.bigints.UInt256;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
public class SimpleWorldTest {
private static final Address ADDRESS1 = Address.fromHexString("0x0");
private static final Address ADDRESS2 = Address.fromHexString("0x1");
private static final Address ADDRESS3 = Address.fromHexString("0x2");
private SimpleWorld simpleWorld;
@BeforeEach
void setUp() {
simpleWorld = new SimpleWorld();
}
@Test
void get_noAccounts() {
assertThat(simpleWorld.get(ADDRESS1)).isNull();
}
@Test
void get_noAccountsWithParent() {
WorldUpdater childUpdater = simpleWorld.updater();
assertThat(childUpdater.get(ADDRESS1)).isNull();
}
@Test
void createAccount_cannotCreateIfExists() {
simpleWorld.createAccount(ADDRESS1);
assertThatThrownBy(() -> simpleWorld.createAccount(ADDRESS1))
.isInstanceOf(IllegalStateException.class);
}
@Test
void get_createdAccountExistsInParent() {
MutableAccount account = simpleWorld.createAccount(ADDRESS1);
WorldUpdater childUpdater = simpleWorld.updater();
assertThat(childUpdater.get(ADDRESS1)).isEqualTo(account);
}
@Test
void get_createdAccountExistsInMultiParent() {
MutableAccount account = simpleWorld.createAccount(ADDRESS1);
WorldUpdater childUpdater = simpleWorld.updater();
childUpdater = childUpdater.updater();
childUpdater = childUpdater.updater();
childUpdater = childUpdater.updater();
assertThat(childUpdater.get(ADDRESS1)).isEqualTo(account);
}
@Test
void get_createdAccountExists() {
MutableAccount account = simpleWorld.createAccount(ADDRESS1);
assertThat(simpleWorld.get(ADDRESS1)).isEqualTo(account);
}
@Test
void get_createdAccountDeleted() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.deleteAccount(ADDRESS1);
assertThat(simpleWorld.get(ADDRESS1)).isNull();
}
@Test
void get_revertRemovesAllAccounts() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
simpleWorld.createAccount(ADDRESS3);
simpleWorld.revert();
assertThat(simpleWorld.get(ADDRESS1)).isNull();
assertThat(simpleWorld.get(ADDRESS2)).isNull();
assertThat(simpleWorld.get(ADDRESS3)).isNull();
}
@Test
void get_commitKeepsAllAccounts() {
MutableAccount acc1 = simpleWorld.createAccount(ADDRESS1);
MutableAccount acc2 = simpleWorld.createAccount(ADDRESS2);
MutableAccount acc3 = simpleWorld.createAccount(ADDRESS3);
simpleWorld.commit();
assertThat(simpleWorld.get(ADDRESS1)).isEqualTo(acc1);
assertThat(simpleWorld.get(ADDRESS2)).isEqualTo(acc2);
assertThat(simpleWorld.get(ADDRESS3)).isEqualTo(acc3);
}
@Test
void get_createdAccountDeletedInChild() {
simpleWorld.createAccount(ADDRESS1);
WorldUpdater childUpdater = simpleWorld.updater();
childUpdater.deleteAccount(ADDRESS1);
assertThat(childUpdater.get(ADDRESS1)).isNull();
}
@Test
void getAccount_noAccounts() {
assertThat(simpleWorld.getAccount(ADDRESS1)).isNull();
}
@Test
void getAccount_noAccountsWithParent() {
WorldUpdater childUpdater = simpleWorld.updater();
assertThat(childUpdater.getAccount(ADDRESS1)).isNull();
}
@Test
void getAccount_createdAccountExistsInParent() {
MutableAccount account = simpleWorld.createAccount(ADDRESS1);
account.setStorageValue(UInt256.MAX_VALUE, UInt256.ONE);
WorldUpdater childUpdater = simpleWorld.updater();
assertThat(childUpdater.getAccount(ADDRESS1).getOriginalStorageValue(UInt256.MAX_VALUE))
.isEqualTo(UInt256.ONE);
}
@Test
void getAccount_createdAccountExistsInMultiParent() {
MutableAccount account = simpleWorld.createAccount(ADDRESS1);
account.setStorageValue(UInt256.MAX_VALUE, UInt256.ONE);
WorldUpdater childUpdater = simpleWorld.updater();
childUpdater = childUpdater.updater();
childUpdater = childUpdater.updater();
childUpdater = childUpdater.updater();
assertThat(childUpdater.getAccount(ADDRESS1).getOriginalStorageValue(UInt256.MAX_VALUE))
.isEqualTo(UInt256.ONE);
}
@Test
void getAccount_createdAccountExists() {
MutableAccount account = simpleWorld.createAccount(ADDRESS1);
assertThat(simpleWorld.getAccount(ADDRESS1)).isEqualTo(account);
}
@Test
void getAccount_createdAccountDeleted() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.deleteAccount(ADDRESS1);
assertThat(simpleWorld.getAccount(ADDRESS1)).isNull();
}
@Test
void getAccount_revertRemovesAllAccounts() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
simpleWorld.createAccount(ADDRESS3);
simpleWorld.revert();
assertThat(simpleWorld.getAccount(ADDRESS1)).isNull();
assertThat(simpleWorld.getAccount(ADDRESS2)).isNull();
assertThat(simpleWorld.getAccount(ADDRESS3)).isNull();
}
@Test
void getAccount_commitKeepsAllAccounts() {
MutableAccount acc1 = simpleWorld.createAccount(ADDRESS1);
MutableAccount acc2 = simpleWorld.createAccount(ADDRESS2);
MutableAccount acc3 = simpleWorld.createAccount(ADDRESS3);
simpleWorld.commit();
assertThat(simpleWorld.getAccount(ADDRESS1)).isEqualTo(acc1);
assertThat(simpleWorld.getAccount(ADDRESS2)).isEqualTo(acc2);
assertThat(simpleWorld.getAccount(ADDRESS3)).isEqualTo(acc3);
}
@Test
void getAccount_createdAccountDeletedInChild() {
simpleWorld.createAccount(ADDRESS1);
WorldUpdater childUpdater = simpleWorld.updater();
childUpdater.deleteAccount(ADDRESS1);
assertThat(childUpdater.getAccount(ADDRESS1)).isNull();
}
@Test
void getTouchedAccounts_createdAccounts() {
Account acc1 = simpleWorld.createAccount(ADDRESS1);
Account acc2 = simpleWorld.createAccount(ADDRESS2);
Account acc3 = simpleWorld.createAccount(ADDRESS3);
assertThat(simpleWorld.getTouchedAccounts().toArray())
.containsExactlyInAnyOrder(acc1, acc2, acc3);
}
@Test
void getTouchedAccounts_revertedAccounts() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
simpleWorld.createAccount(ADDRESS3);
simpleWorld.revert();
assertThat(simpleWorld.getTouchedAccounts()).isEmpty();
}
@Test
void getTouchedAccounts_createdAndDeletedAccounts() {
Account acc1 = simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
Account acc3 = simpleWorld.createAccount(ADDRESS3);
simpleWorld.deleteAccount(ADDRESS2);
assertThat(simpleWorld.getTouchedAccounts().toArray()).containsExactlyInAnyOrder(acc1, acc3);
}
@Test
void getTouchedAccounts_allDeletedAccounts() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
simpleWorld.createAccount(ADDRESS3);
simpleWorld.deleteAccount(ADDRESS1);
simpleWorld.deleteAccount(ADDRESS2);
simpleWorld.deleteAccount(ADDRESS3);
assertThat(simpleWorld.getTouchedAccounts()).isEmpty();
}
@Test
void getTouchedAccounts_createdAndCommittedAccounts() {
Account acc1 = simpleWorld.createAccount(ADDRESS1);
Account acc2 = simpleWorld.createAccount(ADDRESS2);
Account acc3 = simpleWorld.createAccount(ADDRESS3);
simpleWorld.commit();
assertThat(simpleWorld.getTouchedAccounts().toArray())
.containsExactlyInAnyOrder(acc1, acc2, acc3);
}
@Test
void getDeletedAccountAddresses_singleDeleted() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
simpleWorld.createAccount(ADDRESS3);
simpleWorld.deleteAccount(ADDRESS2);
assertThat(simpleWorld.getDeletedAccountAddresses().toArray()).containsExactly(ADDRESS2);
}
@Test
void getDeletedAccountAddresses_allDeleted() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
simpleWorld.createAccount(ADDRESS3);
simpleWorld.deleteAccount(ADDRESS1);
simpleWorld.deleteAccount(ADDRESS2);
simpleWorld.deleteAccount(ADDRESS3);
assertThat(simpleWorld.getDeletedAccountAddresses().toArray())
.containsExactlyInAnyOrder(ADDRESS1, ADDRESS2, ADDRESS3);
}
@Test
void getDeletedAccountAddresses_allDeletedThenRevert() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
simpleWorld.createAccount(ADDRESS3);
simpleWorld.deleteAccount(ADDRESS1);
simpleWorld.deleteAccount(ADDRESS2);
simpleWorld.deleteAccount(ADDRESS3);
simpleWorld.revert();
assertThat(simpleWorld.getDeletedAccountAddresses()).isEmpty();
}
@Test
void getDeletedAccountAddresses_allDeletedThenCommit() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
simpleWorld.createAccount(ADDRESS3);
simpleWorld.deleteAccount(ADDRESS1);
simpleWorld.deleteAccount(ADDRESS2);
simpleWorld.deleteAccount(ADDRESS3);
simpleWorld.commit();
assertThat(simpleWorld.getDeletedAccountAddresses().toArray())
.containsExactlyInAnyOrder(ADDRESS1, ADDRESS2, ADDRESS3);
}
@Test
void commit_deletedAccountNoNPEs() {
simpleWorld.createAccount(ADDRESS1);
simpleWorld.createAccount(ADDRESS2);
simpleWorld.createAccount(ADDRESS3);
simpleWorld.deleteAccount(ADDRESS1);
simpleWorld.commit();
}
@Test
void commit_onlyCommitsNewAccountsToDirectParent() {
WorldUpdater simpleWorldLevel1 = simpleWorld.updater();
WorldUpdater simpleWorldLevel2 = simpleWorldLevel1.updater();
MutableAccount createdAccount = simpleWorldLevel2.createAccount(ADDRESS1);
simpleWorldLevel2.commit();
assertThat(simpleWorldLevel1.getTouchedAccounts().toArray()).containsExactly(createdAccount);
assertThat(simpleWorld.getTouchedAccounts()).isEmpty();
}
@Test
void commit_onlyCommitsDeletedAccountsToDirectParent() {
WorldUpdater simpleWorldLevel1 = simpleWorld.updater();
WorldUpdater simpleWorldLevel2 = simpleWorldLevel1.updater();
simpleWorldLevel2.createAccount(ADDRESS2);
simpleWorldLevel2.deleteAccount(ADDRESS2);
simpleWorldLevel2.commit();
assertThat(simpleWorldLevel1.getDeletedAccountAddresses().toArray()).containsExactly(ADDRESS2);
assertThat(simpleWorld.getDeletedAccountAddresses()).isEmpty();
}
@Test
void commit_accountsReflectChangesAfterCommit() {
MutableAccount account = simpleWorld.createAccount(ADDRESS1);
account.setStorageValue(UInt256.MAX_VALUE, UInt256.ONE);
WorldUpdater simpleWorldUpdater = simpleWorld.updater();
account = simpleWorldUpdater.getAccount(ADDRESS1);
account.setStorageValue(UInt256.MAX_VALUE, UInt256.valueOf(22L));
simpleWorldUpdater.commit();
assertThat(simpleWorldUpdater.get(ADDRESS1).getStorageValue(UInt256.MAX_VALUE))
.isEqualTo(simpleWorldUpdater.get(ADDRESS1).getOriginalStorageValue(UInt256.MAX_VALUE));
}
}
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