Add blockchain event bridge service with smart contract event integration

- Phase 1: Core bridge service with gossip broker subscription
- Phase 2: Smart contract event integration via eth_getLogs RPC endpoint
- Add contract event subscriber for AgentStaking, PerformanceVerifier, Marketplace, Bounty, CrossChainBridge
- Add contract event handlers in agent_daemon.py and marketplace.py
- Add systemd service file for blockchain-event-bridge
- Update blockchain node router.py with eth_getLogs endpoint
- Add configuration for contract addresses
- Add tests for contract subscriber and handlers (27 tests passing)

apps/blockchain-event-bridge/tests/test_contract_subscriber.py

@@ -0,0 +1,103 @@
+"""Tests for contract event subscriber."""
+
+import pytest
+from unittest.mock import Mock, AsyncMock, patch
+
+from blockchain_event_bridge.event_subscribers.contracts import ContractEventSubscriber
+
+
+@pytest.mark.asyncio
+async def test_contract_subscriber_initialization():
+    """Test contract subscriber initialization."""
+    from blockchain_event_bridge.config import Settings
+
+    settings = Settings()
+    subscriber = ContractEventSubscriber(settings)
+
+    assert subscriber.settings == settings
+    assert subscriber._running is False
+    assert subscriber.contract_addresses is not None
+
+
+@pytest.mark.asyncio
+async def test_contract_subscriber_set_bridge():
+    """Test setting bridge on contract subscriber."""
+    from blockchain_event_bridge.config import Settings
+    from blockchain_event_bridge.bridge import BlockchainEventBridge
+
+    settings = Settings()
+    subscriber = ContractEventSubscriber(settings)
+    bridge = Mock(spec=BlockchainEventBridge)
+
+    subscriber.set_bridge(bridge)
+    assert subscriber._bridge == bridge
+
+
+@pytest.mark.asyncio
+async def test_contract_subscriber_disabled():
+    """Test contract subscriber when disabled."""
+    from blockchain_event_bridge.config import Settings
+
+    settings = Settings(subscribe_contracts=False)
+    subscriber = ContractEventSubscriber(settings)
+
+    await subscriber.run()
+    assert subscriber._running is False
+
+
+@pytest.mark.asyncio
+async def test_contract_subscriber_stop():
+    """Test stopping contract subscriber."""
+    from blockchain_event_bridge.config import Settings
+
+    settings = Settings(subscribe_contracts=False)
+    subscriber = ContractEventSubscriber(settings)
+
+    await subscriber.stop()
+    assert subscriber._running is False
+
+
+@pytest.mark.asyncio
+async def test_process_staking_event():
+    """Test processing staking event."""
+    from blockchain_event_bridge.config import Settings
+    from blockchain_event_bridge.bridge import BlockchainEventBridge
+
+    settings = Settings()
+    subscriber = ContractEventSubscriber(settings)
+    bridge = Mock(spec=BlockchainEventBridge)
+    bridge.handle_staking_event = AsyncMock()
+
+    subscriber.set_bridge(bridge)
+
+    event_log = {
+        "topics": ["StakeCreated"],
+        "data": "{}",
+        "address": "0x123"
+    }
+
+    await subscriber._handle_staking_event(event_log)
+    bridge.handle_staking_event.assert_called_once_with(event_log)
+
+
+@pytest.mark.asyncio
+async def test_process_performance_event():
+    """Test processing performance event."""
+    from blockchain_event_bridge.config import Settings
+    from blockchain_event_bridge.bridge import BlockchainEventBridge
+
+    settings = Settings()
+    subscriber = ContractEventSubscriber(settings)
+    bridge = Mock(spec=BlockchainEventBridge)
+    bridge.handle_performance_event = AsyncMock()
+
+    subscriber.set_bridge(bridge)
+
+    event_log = {
+        "topics": ["PerformanceVerified"],
+        "data": "{}",
+        "address": "0x123"
+    }
+
+    await subscriber._handle_performance_event(event_log)
+    bridge.handle_performance_event.assert_called_once_with(event_log)