src/Socialbox/Classes/StandardMethods/AddressBook/AddressBookRevokeSignature.php

@@ -0,0 +1,89 @@
+<?php
+
+    namespace Socialbox\Classes\StandardMethods\AddressBook;
+
+    use InvalidArgumentException;
+    use Socialbox\Abstracts\Method;
+    use Socialbox\Classes\Configuration;
+    use Socialbox\Enums\StandardError;
+    use Socialbox\Exceptions\DatabaseOperationException;
+    use Socialbox\Exceptions\Standard\InvalidRpcArgumentException;
+    use Socialbox\Exceptions\Standard\MissingRpcArgumentException;
+    use Socialbox\Exceptions\Standard\StandardRpcException;
+    use Socialbox\Interfaces\SerializableInterface;
+    use Socialbox\Managers\ContactManager;
+    use Socialbox\Objects\ClientRequest;
+    use Socialbox\Objects\PeerAddress;
+    use Socialbox\Objects\RpcRequest;
+    use Socialbox\Socialbox;
+    use Symfony\Component\Uid\Uuid;
+
+    class AddressBookRevokeSignature extends Method
+    {
+        /**
+         * @inheritDoc
+         */
+        public static function execute(ClientRequest $request, RpcRequest $rpcRequest): ?SerializableInterface
+        {
+            if(!$rpcRequest->containsParameter('peer'))
+            {
+                throw new MissingRpcArgumentException('peer');
+            }
+
+            try
+            {
+                $address = PeerAddress::fromAddress($rpcRequest->getParameter('peer'));
+            }
+            catch(InvalidArgumentException $e)
+            {
+                throw new InvalidRpcArgumentException('peer', $e->getMessage());
+            }
+
+            if(!$rpcRequest->containsParameter('uuid'))
+            {
+                throw new MissingRpcArgumentException('uuid');
+            }
+
+            try
+            {
+                $uuid = Uuid::fromString($rpcRequest->getParameter('uuid'));
+            }
+            catch(InvalidArgumentException $e)
+            {
+                throw new InvalidRpcArgumentException('uuid', $e->getMessage());
+            }
+
+            try
+            {
+                // Check if the contact already exists
+                $peer = $request->getPeer();
+                $contact = ContactManager::getContact($peer, $address);
+            }
+            catch (DatabaseOperationException $e)
+            {
+                throw new StandardRpcException('Failed to check contact state with calling peer', StandardError::INTERNAL_SERVER_ERROR, $e);
+            }
+
+            if($contact === null)
+            {
+                return $rpcRequest->produceResponse(false);
+            }
+
+            try
+            {
+                if(!ContactManager::contactSigningKeyUuidExists($contact, $uuid))
+                {
+                    return $rpcRequest->produceResponse(false);
+                }
+
+                ContactManager::removeContactSigningKey($contact, $uuid);
+            }
+            catch (DatabaseOperationException $e)
+            {
+                throw new StandardRpcException('Failed to remove contact signature', StandardError::INTERNAL_SERVER_ERROR, $e);
+            }
+
+            // Return success
+            return $rpcRequest->produceResponse(true);
+        }
+    }

src/Socialbox/Managers/ContactManager.php

@@ -371,6 +371,26 @@
             }
         }
 
+        public static function removeContactSigningKey(string|ContactDatabaseRecord $contactUuid, string $signatureUuid): void
+        {
+            if($contactUuid instanceof ContactDatabaseRecord)
+            {
+                $contactUuid = $contactUuid->getUuid();
+            }
+
+            try
+            {
+                $statement = Database::getConnection()->prepare('DELETE FROM contacts_known_keys WHERE contact_uuid=:contact_uuid AND signature_uuid=:signature_uuid');
+                $statement->bindParam(':contact_uuid', $contactUuid);
+                $statement->bindParam(':signature_uuid', $signatureUuid);
+                $statement->execute();
+            }
+            catch(PDOException $e)
+            {
+                throw new DatabaseOperationException('Failed to remove a signing key from a contact in the database', $e);
+            }
+        }
+
         /**
          * Determines if a signing key UUID exists for a contact in the database.
          *