CryptoDelete handle implementation

hedera-node/hedera-app-spi/src/main/java/com/hedera/node/app/spi/validation/ExpiryValidator.java

@@ -16,6 +16,8 @@
 
 package com.hedera.node.app.spi.validation;
 
+import com.hedera.hapi.node.base.ResponseCodeEnum;
+import com.hedera.hapi.node.state.token.Account;
 import com.hedera.node.app.spi.workflows.HandleException;
 import com.hedera.node.app.spi.workflows.TransactionHandler;
 
@@ -45,4 +47,28 @@ public interface ExpiryValidator {
      * @throws HandleException if the metadata is invalid
      */
     ExpiryMeta resolveUpdateAttempt(ExpiryMeta currentMetadata, ExpiryMeta updateMetadata);
+
+    /**
+     * Gets the expiration status of an account
+     * @param account the account to check
+     * @param isAutoRenewEnabled whether auto-renew is enabled for the account
+     * @param expireContracts whether to expire contracts
+     * @param expireAccounts whether to expire accounts
+     * @return OK if the account is not expired, otherwise the appropriate error code
+     */
+    ResponseCodeEnum expirationStatus(
+            Account account, boolean isAutoRenewEnabled, boolean expireContracts, boolean expireAccounts);
+
+    /**
+     * Gets the expiration status of an account and returns if the account is detached
+     * @param account the account to check
+     * @param isAutoRenewEnabled whether auto-renew is enabled for the account
+     * @param expireContracts whether to expire contracts
+     * @param expireAccounts whether to expire accounts
+     * @return true if the account is detached, otherwise false
+     */
+    default boolean isDetached(
+            Account account, boolean isAutoRenewEnabled, boolean expireContracts, boolean expireAccounts) {
+        return expirationStatus(account, isAutoRenewEnabled, expireContracts, expireAccounts) != ResponseCodeEnum.OK;
+    }
 }

hedera-node/hedera-app/src/main/java/com/hedera/node/app/workflows/dispatcher/MonoTransactionDispatcher.java

@@ -94,6 +94,11 @@ protected void finishCryptoCreate(
         accountStore.commit();
     }
 
+    @Override
+    protected void finishCryptoDelete(@NonNull final WritableAccountStore accountStore) {
+        accountStore.commit();
+    }
+
     @Override
     protected void finishConsensusUpdateTopic(@NonNull WritableTopicStore topicStore) {
         topicStore.commit();

hedera-node/hedera-app/src/main/java/com/hedera/node/app/workflows/dispatcher/TransactionDispatcher.java

@@ -110,6 +110,7 @@
             case TOKEN_FEE_SCHEDULE_UPDATE -> dispatchTokenFeeScheduleUpdate(
                     txn, writableStoreFactory.createTokenStore());
             case CRYPTO_CREATE -> dispatchCryptoCreate(txn, writableStoreFactory.createAccountStore());
+            case CRYPTO_DELETE -> dispatchCryptoDelete(txn, writableStoreFactory.createAccountStore());
             case UTIL_PRNG -> dispatchPrng(txn);
             default -> throw new IllegalArgumentException(TYPE_NOT_SUPPORTED);
         }
@@ -431,6 +432,18 @@
         finishCryptoCreate(recordBuilder, accountStore);
     }
 
+    /**
+     * Dispatches the crypto delete transaction to the appropriate handler.
+     * @param cryptoDelete the crypto delete transaction body
+     * @param accountStore the writable account store
+     */
+    private void dispatchCryptoDelete(
+            @NonNull final TransactionBody cryptoDelete, @NonNull final WritableAccountStore accountStore) {
+        final var handler = handlers.cryptoDeleteHandler();
+        handler.handle(handleContext, cryptoDelete, accountStore);
+        finishCryptoDelete(accountStore);
+    }
+
     /**
      * A temporary hook to isolate logic that we expect to move to a workflow, but
      * is currently needed when running with facility implementations that are adapters
@@ -444,6 +457,17 @@
         // No-op by default
     }
 
+    /**
+     * A temporary hook to isolate logic that we expect to move to a workflow, but
+     * is currently needed when running with facility implementations that are adapters
+     * for either {@code mono-service} logic or integration tests.
+     *
+     * @param accountStore the account store used for the creation
+     */
+    protected void finishCryptoDelete(@NonNull final WritableAccountStore accountStore) {
+        // No-op by default
+    }
+
     /**
      * Dispatches the token fee schedule update transaction to the appropriate handler.
      *

hedera-node/hedera-app/src/main/java/com/hedera/node/app/workflows/handle/validation/StandardizedExpiryValidator.java

@@ -16,11 +16,16 @@
 
 package com.hedera.node.app.workflows.handle.validation;
 
+import static com.hedera.hapi.node.base.ResponseCodeEnum.ACCOUNT_EXPIRED_AND_PENDING_REMOVAL;
+import static com.hedera.hapi.node.base.ResponseCodeEnum.CONTRACT_EXPIRED_AND_PENDING_REMOVAL;
 import static com.hedera.hapi.node.base.ResponseCodeEnum.EXPIRATION_REDUCTION_NOT_ALLOWED;
 import static com.hedera.hapi.node.base.ResponseCodeEnum.INVALID_AUTORENEW_ACCOUNT;
+import static com.hedera.hapi.node.base.ResponseCodeEnum.OK;
 import static com.hedera.node.app.spi.workflows.HandleException.validateFalse;
 import static com.hedera.node.app.spi.workflows.HandleException.validateTrue;
 
+import com.hedera.hapi.node.base.ResponseCodeEnum;
+import com.hedera.hapi.node.state.token.Account;
 import com.hedera.node.app.service.mono.config.HederaNumbers;
 import com.hedera.node.app.service.mono.store.models.Id;
 import com.hedera.node.app.spi.validation.AttributeValidator;
@@ -115,6 +120,30 @@
         return new ExpiryMeta(resolvedExpiry, resolvedAutoRenewPeriod, resolvedAutoRenewNum);
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public ResponseCodeEnum expirationStatus(
+            @NonNull final Account account,
+            final boolean isAutoRenewEnabled,
+            final boolean expireAccounts,
+            final boolean expireContracts) {
+        if (!isAutoRenewEnabled) {
+            return OK;
+        }
+        if (account.tinybarBalance() > 0) {
+            return OK;
+        }
+        if (!account.expiredAndPendingRemoval()) {
+            return OK;
+        }
+        if (isExpiryDisabled(account.smartContract(), expireAccounts, expireContracts)) {
+            return OK;
+        }
+        return account.smartContract() ? CONTRACT_EXPIRED_AND_PENDING_REMOVAL : ACCOUNT_EXPIRED_AND_PENDING_REMOVAL;
+    }
+
     /**
      * Helper to check if an entity with the given metadata has a completely specified
      * auto-renew configuration. This is true if either the {@link ExpiryMeta} includes
@@ -148,4 +177,8 @@
         final var autoRenewId = new Id(numbers.shard(), numbers.realm(), num);
         idValidator.accept(autoRenewId);
     }
+
+    private boolean isExpiryDisabled(boolean smartContract, boolean expireAccounts, boolean expireContracts) {
+        return (smartContract && !expireContracts) || (!smartContract && !expireAccounts);
+    }
 }

hedera-node/hedera-app/src/test/java/com/hedera/node/app/workflows/dispatcher/MonoTransactionDispatcherTest.java

@@ -613,6 +613,14 @@ void dispatchesCryptoCreateAsExpected() {
         verify(writableAccountStore).commit();
     }
 
+    @Test
+    void dispatchesCryptoDeleteAsExpected() {
+        given(writableStoreFactory.createAccountStore()).willReturn(writableAccountStore);
+
+        dispatcher.dispatchHandle(HederaFunctionality.CRYPTO_DELETE, transactionBody, writableStoreFactory);
+        verify(writableAccountStore).commit();
+    }
+
     @Test
     void doesntCommitWhenUsageLimitsExceeded() {
         final var createBuilder = mock(CreateAccountRecordBuilder.class);

hedera-node/hedera-app/src/test/java/com/hedera/node/app/workflows/handle/validation/MonoExpiryValidatorTest.java

@@ -16,16 +16,22 @@
 
 package com.hedera.node.app.workflows.handle.validation;
 
+import static com.hedera.hapi.node.base.ResponseCodeEnum.ACCOUNT_EXPIRED_AND_PENDING_REMOVAL;
+import static com.hedera.hapi.node.base.ResponseCodeEnum.CONTRACT_EXPIRED_AND_PENDING_REMOVAL;
+import static com.hedera.hapi.node.base.ResponseCodeEnum.OK;
 import static com.hedera.node.app.spi.validation.ExpiryMeta.NA;
 import static com.hederahashgraph.api.proto.java.ResponseCodeEnum.INVALID_AUTORENEW_ACCOUNT;
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.mockito.ArgumentMatchers.anyLong;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.BDDMockito.willThrow;
 
 import com.hedera.hapi.node.base.ResponseCodeEnum;
+import com.hedera.hapi.node.state.token.Account;
 import com.hedera.node.app.service.evm.exceptions.InvalidTransactionException;
 import com.hedera.node.app.service.mono.config.HederaNumbers;
 import com.hedera.node.app.service.mono.store.AccountStore;
@@ -61,6 +67,9 @@ class MonoExpiryValidatorTest {
     @Mock
     private HederaNumbers numbers;
 
+    @Mock
+    private Account account;
+
     private MonoExpiryValidator subject;
 
     @BeforeEach
@@ -279,6 +288,40 @@ void canUseWildcardForRemovingAutoRenewAccount() {
         assertEquals(update, subject.resolveUpdateAttempt(current, update));
     }
 
+    @Test
+    void checksIfAccountIsDetachedIfBalanceZero() {
+        given(account.tinybarBalance()).willReturn(0L);
+
+        assertEquals(OK, subject.expirationStatus(account, true, true, true));
+        assertFalse(subject.isDetached(account, true, true, true));
+    }
+
+    @Test
+    void failsIfAccountExpiredAndPendingRemoval() {
+        given(account.expiredAndPendingRemoval()).willReturn(true);
+
+        assertEquals(ACCOUNT_EXPIRED_AND_PENDING_REMOVAL, subject.expirationStatus(account, true, true, true));
+        assertTrue(subject.isDetached(account, true, true, true));
+
+        given(account.smartContract()).willReturn(true);
+        assertEquals(CONTRACT_EXPIRED_AND_PENDING_REMOVAL, subject.expirationStatus(account, true, true, true));
+        assertTrue(subject.isDetached(account, true, true, true));
+    }
+
+    @Test
+    void notDetachedIfAccountNotExpired() {
+        given(account.expiredAndPendingRemoval()).willReturn(false);
+
+        assertEquals(OK, subject.expirationStatus(account, true, true, true));
+        assertFalse(subject.isDetached(account, true, true, true));
+    }
+
+    @Test
+    void notDetachedIfAutoRenewDisabled() {
+        assertEquals(OK, subject.expirationStatus(account, false, false, false));
+        assertFalse(subject.isDetached(account, false, false, false));
+    }
+
     private static void assertFailsWith(final ResponseCodeEnum expected, final Runnable runnable) {
         final var e = assertThrows(HandleException.class, runnable::run);
         assertEquals(expected, e.getStatus());

hedera-node/hedera-config/src/main/java/com/hedera/node/config/data/AutoRenewConfig.java

@@ -17,7 +17,22 @@
 package com.hedera.node.config.data;
 
 import com.swirlds.config.api.ConfigData;
+import com.swirlds.config.api.ConfigProperty;
+import java.util.Set;
 
 @ConfigData("autoRenew")
-public record AutoRenewConfig( // @ConfigProperty(defaultValue = "") Set<EntityType> targetTypes
-        ) {}
+public record AutoRenewConfig(
+        //         @ConfigProperty(defaultValue = "") Set<EntityType> targetTypes
+        @ConfigProperty(defaultValue = "CONTRACT") Set<String> targetTypes) {
+    public boolean expireContracts() {
+        return targetTypes.contains("CONTRACT");
+    }
+
+    public boolean expireAccounts() {
+        return targetTypes.contains("ACCOUNT");
+    }
+
+    public boolean isAutoRenewEnabled() {
+        return !targetTypes.isEmpty();
+    }
+}

hedera-node/hedera-token-service-impl/build.gradle.kts

@@ -30,6 +30,7 @@ configurations.all {
 dependencies {
   implementation(project(":hedera-node:hapi"))
   implementation(project(":hedera-node:hedera-config"))
+  implementation(project(mapOf("path" to ":hedera-node:hedera-config")))
   testImplementation(project(mapOf("path" to ":hedera-node:hedera-app")))
   annotationProcessor(libs.dagger.compiler)
   api(project(":hedera-node:hedera-token-service"))

hedera-node/hedera-token-service-impl/src/main/java/com/hedera/node/app/service/token/impl/WritableAccountStore.java

@@ -127,6 +127,15 @@ public Optional<Account> getForModify(final AccountID id) {
         return Optional.ofNullable(accountState.getForModify(EntityNumVirtualKey.fromLong(accountNum)));
     }
 
+    /**
+     * Removes the {@link Account} with the given {@link AccountID} from the state.
+     * This will add value of the accountId to num in the modifications in state.
+     * @param accountID - the account id of the account to be removed.
+     */
+    public void remove(@NonNull final AccountID accountID) {
+        accountState.remove(EntityNumVirtualKey.fromLong(accountID.accountNum()));
+    }
+
     /**
      * Returns the number of accounts in the state. It also includes modifications in the {@link
      * WritableKVState}.