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<?php declare(strict_types=1); |
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/** |
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* This file is part of the ngutech/lnd-adapter project. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace NGUtech\Lnd\Message; |
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use Daikon\AsyncJob\Worker\WorkerInterface; |
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use Daikon\Boot\Service\Provisioner\MessageBusProvisioner; |
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use Daikon\Interop\Assertion; |
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use Daikon\Interop\RuntimeException; |
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use Daikon\MessageBus\MessageBusInterface; |
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use Daikon\RabbitMq3\Connector\RabbitMq3Connector; |
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use Daikon\ValueObject\Timestamp; |
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use NGUtech\Bitcoin\Service\SatoshiCurrencies; |
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use NGUtech\Lightning\Message\LightningInvoiceMessageInterface; |
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use NGUtech\Lightning\Message\LightningMessageInterface; |
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use PhpAmqpLib\Channel\AMQPChannel; |
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use PhpAmqpLib\Message\AMQPMessage; |
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use Psr\Log\LoggerInterface; |
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final class LndMessageWorker implements WorkerInterface |
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{ |
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private const MESSAGE_INVOICE = 'lnd.message.invoice'; |
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private const MESSAGE_HTLC_EVENT = 'lnd.message.htlc_event'; |
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private const STATE_INVOICE_OPEN = 0; |
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private const STATE_INVOICE_SETTLED = 1; |
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private const STATE_INVOICE_CANCELLED = 2; |
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private const STATE_INVOICE_ACCEPTED = 3; |
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private const EVENT_HTLC_FORWARD = 7; |
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private const EVENT_HTLC_FORWARD_FAIL = 8; |
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private const EVENT_HTLC_SETTLE = 9; |
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private const EVENT_HTLC_LINK_FAIL = 10; |
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private RabbitMq3Connector $connector; |
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private MessageBusInterface $messageBus; |
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private LoggerInterface $logger; |
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private array $settings; |
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public function __construct( |
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RabbitMq3Connector $connector, |
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MessageBusInterface $messageBus, |
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LoggerInterface $logger, |
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array $settings = [] |
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) { |
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$this->connector = $connector; |
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$this->messageBus = $messageBus; |
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$this->logger = $logger; |
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$this->settings = $settings; |
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} |
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public function run(array $parameters = []): void |
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{ |
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$queue = $parameters['queue']; |
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Assertion::notBlank($queue); |
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$messageHandler = function (AMQPMessage $amqpMessage): void { |
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$this->execute($amqpMessage); |
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}; |
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/** @var AMQPChannel $channel */ |
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$channel = $this->connector->getConnection()->channel(); |
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$channel->basic_qos(0, 1, false); |
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$channel->basic_consume($queue, '', true, false, false, false, $messageHandler); |
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while (count($channel->callbacks)) { |
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$channel->wait(); |
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} |
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} |
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private function execute(AMQPMessage $amqpMessage): void |
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{ |
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try { |
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$message = $this->createMessage($amqpMessage); |
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if ($message instanceof LightningMessageInterface) { |
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$this->messageBus->publish($message, MessageBusProvisioner::EVENTS_CHANNEL); |
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} |
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$amqpMessage->ack(); |
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} catch (RuntimeException $error) { |
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$this->logger->error( |
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"Error handling lnd message '{$amqpMessage->getRoutingKey()}'.", |
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['exception' => $error->getTrace()] |
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); |
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$amqpMessage->nack(); |
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} |
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} |
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private function createMessage(AMQPMessage $amqpMessage): ?LightningMessageInterface |
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{ |
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switch ($amqpMessage->getRoutingKey()) { |
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case self::MESSAGE_INVOICE: |
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$message = $this->createInvoiceMessage($amqpMessage); |
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break; |
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case self::MESSAGE_HTLC_EVENT: |
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$message = $this->createHtlcMessage($amqpMessage); |
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break; |
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default: |
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// ignore unknown routing keys |
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} |
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return $message ?? null; |
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} |
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private function createInvoiceMessage(AMQPMessage $amqpMessage): LightningInvoiceMessageInterface |
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{ |
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$invoice = json_decode($amqpMessage->body, true); |
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switch ($invoice['state']) { |
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case self::STATE_INVOICE_OPEN: |
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$messageFqcn = LndInvoiceRequested::class; |
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$timestamp = Timestamp::fromTime($invoice['creationDate']); |
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break; |
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case self::STATE_INVOICE_SETTLED: |
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$messageFqcn = LndInvoiceSettled::class; |
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$timestamp = Timestamp::fromTime($invoice['settleDate']); |
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break; |
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case self::STATE_INVOICE_CANCELLED: |
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$messageFqcn = LndInvoiceCancelled::class; |
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$timestamp = $amqpMessage->get('timestamp'); |
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break; |
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case self::STATE_INVOICE_ACCEPTED: |
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$messageFqcn = LndInvoiceAccepted::class; |
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$timestamp = $amqpMessage->get('timestamp'); |
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break; |
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default: |
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throw new RuntimeException("Unhandled LND invoice state '".$invoice['state']."'."); |
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} |
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return $messageFqcn::fromNative([ |
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'preimageHash' => $invoice['rHash'], |
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'preimage' => $invoice['rPreimage'] ?? null, |
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'request' => $invoice['paymentRequest'], |
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'amount' => $invoice['valueMsat'].SatoshiCurrencies::MSAT, |
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'amountPaid' => $invoice['amtPaidMsat'].SatoshiCurrencies::MSAT, |
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'timestamp' => (string)$timestamp, |
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'cltvExpiry' => $invoice['cltvExpiry'] |
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]); |
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} |
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private function createHtlcMessage(AMQPMessage $amqpMessage): LightningMessageInterface |
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{ |
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$event = json_decode($amqpMessage->body, true); |
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switch ($event['event']) { |
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case self::EVENT_HTLC_FORWARD: |
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$messageFqcn = LndHtlcForwarded::class; |
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break; |
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case self::EVENT_HTLC_FORWARD_FAIL: |
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$messageFqcn = LndHtlcForwardFailed::class; |
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break; |
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case self::EVENT_HTLC_SETTLE: |
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$messageFqcn = LndHtlcSettled::class; |
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break; |
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case self::EVENT_HTLC_LINK_FAIL: |
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$messageFqcn = LndHtlcLinkFailed::class; |
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break; |
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default: |
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throw new RuntimeException("Unhandled LND event '".$event['event']."'."); |
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} |
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return $messageFqcn::fromNative([ |
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'incomingChannelId' => $event['incomingChannelId'], |
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'outgoingChannelId' => $event['outgoingChannelId'], |
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'incomingHtlcId' => $event['incomingHtlcId'], |
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'outgoingHtlcId' => $event['outgoingHtlcId'], |
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'timestamp' => substr_replace(substr($event['timestampNs'], 0, -3), '.', -6, 0), |
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'eventType' => $event['eventType'] |
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]); |
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} |
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} |
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NGUtech /
lnd-adapter
