Update Python version requirements and fix compatibility issues
- Bump minimum Python version from 3.11 to 3.13 across all apps - Add Python 3.11-3.13 test matrix to CLI workflow - Document Python 3.11+ requirement in .env.example - Fix Starlette Broadcast removal with in-process fallback implementation - Add _InProcessBroadcast class for tests when Starlette Broadcast is unavailable - Refactor API key validators to read live settings instead of cached values - Update database models with explicit
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oib
385
tests/integration/test_blockchain_sync.py
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385
tests/integration/test_blockchain_sync.py
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"""
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Blockchain Synchronization Integration Tests
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Tests cross-site blockchain synchronization between all 3 nodes.
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Verifies that nodes maintain consistent blockchain state and
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properly propagate blocks and transactions.
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"""
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import pytest
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import asyncio
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import time
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import httpx
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from typing import Dict, Any
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# Import from fixtures directory
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import sys
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from pathlib import Path
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sys.path.insert(0, str(Path(__file__).parent / "fixtures"))
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from mock_blockchain_node import MockBlockchainNode
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class TestBlockchainSync:
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"""Test blockchain synchronization across multiple nodes."""
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@pytest.fixture
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def mock_nodes(self):
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"""Create mock blockchain nodes for testing."""
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nodes = {
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"node1": MockBlockchainNode("node1", 8082),
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"node2": MockBlockchainNode("node2", 8081),
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"node3": MockBlockchainNode("node3", 8082)
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}
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# Start all nodes
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for node in nodes.values():
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node.start()
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yield nodes
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# Stop all nodes
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for node in nodes.values():
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node.stop()
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@pytest.fixture
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def real_nodes_config(self):
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"""Configuration for real blockchain nodes."""
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return {
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"node1": {
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"url": "http://localhost:8082",
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"name": "Node 1 (localhost)",
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"site": "localhost"
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},
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"node2": {
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"url": "http://localhost:8081",
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"name": "Node 2 (localhost)",
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"site": "localhost"
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},
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"node3": {
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"url": "http://aitbc.keisanki.net/rpc",
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"name": "Node 3 (ns3)",
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"site": "remote"
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}
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}
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async def get_node_status(self, node_url: str) -> Dict[str, Any]:
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"""Get blockchain node status."""
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try:
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async with httpx.AsyncClient() as client:
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response = await client.get(f"{node_url}/head", timeout=5)
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if response.status_code == 200:
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return response.json()
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else:
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return {"error": f"HTTP {response.status_code}"}
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except Exception as e:
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return {"error": str(e)}
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async def wait_for_block_sync(self, nodes: Dict[str, Any], timeout: int = 30) -> bool:
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"""Wait for all nodes to sync to the same block height."""
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start_time = time.time()
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target_height = None
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while time.time() - start_time < timeout:
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heights = {}
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all_synced = True
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# Get heights from all nodes
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for name, config in nodes.items():
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status = await self.get_node_status(config["url"])
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if "error" in status:
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print(f"❌ {name}: {status['error']}")
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all_synced = False
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continue
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height = status.get("height", 0)
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heights[name] = height
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print(f"📊 {config['name']}: Height {height}")
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# Set target height from first successful response
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if target_height is None:
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target_height = height
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# Check if all nodes have the same height
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if all_synced and target_height:
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height_values = list(heights.values())
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if len(set(height_values)) == 1:
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print(f"✅ All nodes synced at height {target_height}")
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return True
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else:
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print(f"⚠️ Nodes out of sync: {heights}")
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await asyncio.sleep(2) # Wait before next check
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print(f"❌ Timeout: Nodes did not sync within {timeout} seconds")
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return False
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def test_mock_node_synchronization(self, mock_nodes):
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"""Test synchronization between mock blockchain nodes."""
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# Create blocks in node1
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node1 = mock_nodes["node1"]
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for i in range(3):
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block_data = {
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"height": i + 1,
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"hash": f"0x{'1234567890abcdef' * 4}{i:08x}",
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"timestamp": time.time(),
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"transactions": []
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}
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node1.add_block(block_data)
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# Wait for propagation
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time.sleep(1)
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# Check if all nodes have the same height
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heights = {}
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for name, node in mock_nodes.items():
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heights[name] = node.get_height()
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# All nodes should have height 3
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for name, height in heights.items():
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assert height == 3, f"{name} has height {height}, expected 3"
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# Check if all nodes have the same hash
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hashes = {}
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for name, node in mock_nodes.items():
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hashes[name] = node.get_hash()
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# All nodes should have the same hash
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assert len(set(hashes.values())) == 1, "Nodes have different block hashes"
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print("✅ Mock nodes synchronized successfully")
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@pytest.mark.asyncio
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async def test_real_node_connectivity(self, real_nodes_config):
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"""Test connectivity to real blockchain nodes."""
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print("🔍 Testing connectivity to real blockchain nodes...")
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connectivity_results = {}
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for name, config in real_nodes_config.items():
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status = await self.get_node_status(config["url"])
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connectivity_results[name] = status
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if "error" in status:
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print(f"❌ {config['name']}: {status['error']}")
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else:
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print(f"✅ {config['name']}: Height {status.get('height', 'N/A')}")
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# At least 2 nodes should be accessible
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accessible_nodes = [name for name, status in connectivity_results.items() if "error" not in status]
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assert len(accessible_nodes) >= 2, f"Only {len(accessible_nodes)} nodes accessible, need at least 2"
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print(f"✅ {len(accessible_nodes)} nodes accessible: {accessible_nodes}")
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@pytest.mark.asyncio
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async def test_real_node_synchronization(self, real_nodes_config):
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"""Test synchronization between real blockchain nodes."""
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print("🔍 Testing real node synchronization...")
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# Check initial synchronization
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initial_sync = await self.wait_for_block_sync(real_nodes_config, timeout=10)
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if not initial_sync:
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print("⚠️ Nodes not initially synchronized, checking individual status...")
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# Get current heights
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heights = {}
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for name, config in real_nodes_config.items():
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status = await self.get_node_status(config["url"])
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if "error" not in status:
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heights[name] = status.get("height", 0)
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print(f"📊 {config['name']}: Height {heights[name]}")
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if len(heights) < 2:
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pytest.skip("Not enough nodes accessible for sync test")
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# Test block propagation
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if "node1" in heights and "node2" in heights:
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print("🔍 Testing block propagation from Node 1 to Node 2...")
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# Get initial height
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initial_height = heights["node1"]
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# Wait a moment for any existing blocks to propagate
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await asyncio.sleep(3)
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# Check if heights are still consistent
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node1_status = await self.get_node_status(real_nodes_config["node1"]["url"])
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node2_status = await self.get_node_status(real_nodes_config["node2"]["url"])
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if "error" not in node1_status and "error" not in node2_status:
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height_diff = abs(node1_status["height"] - node2_status["height"])
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if height_diff <= 2: # Allow small difference due to propagation delay
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print(f"✅ Nodes within acceptable sync range (diff: {height_diff})")
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else:
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print(f"⚠️ Nodes significantly out of sync (diff: {height_diff})")
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else:
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print("❌ One or both nodes not responding")
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@pytest.mark.asyncio
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async def test_cross_site_sync_status(self, real_nodes_config):
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"""Test cross-site synchronization status."""
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print("🔍 Testing cross-site synchronization status...")
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sync_status = {
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"active_nodes": [],
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"node_heights": {},
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"sync_quality": "unknown"
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}
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# Check each node
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for name, config in real_nodes_config.items():
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status = await self.get_node_status(config["url"])
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if "error" not in status:
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sync_status["active_nodes"].append(name)
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sync_status["node_heights"][name] = status.get("height", 0)
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print(f"✅ {config['name']}: Height {status.get('height', 'N/A')}")
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else:
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print(f"❌ {config['name']}: {status['error']}")
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# Analyze sync quality
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if len(sync_status["active_nodes"]) >= 2:
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height_values = list(sync_status["node_heights"].values())
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if len(set(height_values)) == 1:
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sync_status["sync_quality"] = "perfect"
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print(f"✅ Perfect synchronization: All nodes at height {height_values[0]}")
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else:
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max_height = max(height_values)
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min_height = min(height_values)
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height_diff = max_height - min_height
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if height_diff <= 5:
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sync_status["sync_quality"] = "good"
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print(f"✅ Good synchronization: Height range {min_height}-{max_height} (diff: {height_diff})")
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else:
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sync_status["sync_quality"] = "poor"
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print(f"⚠️ Poor synchronization: Height range {min_height}-{max_height} (diff: {height_diff})")
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else:
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sync_status["sync_quality"] = "insufficient"
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print("❌ Insufficient nodes for sync analysis")
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return sync_status
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@pytest.mark.asyncio
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async def test_transaction_propagation(self, real_nodes_config):
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"""Test transaction propagation across nodes."""
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print("🔍 Testing transaction propagation...")
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# Only test if we have at least 2 nodes
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accessible_nodes = [name for name, config in real_nodes_config.items()
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if "error" not in await self.get_node_status(config["url"])]
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if len(accessible_nodes) < 2:
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pytest.skip("Need at least 2 accessible nodes for transaction test")
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# Get initial transaction counts
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tx_counts = {}
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for name in accessible_nodes:
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status = await self.get_node_config(real_nodes_config[name]["url"])
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if "error" not in status:
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tx_counts[name] = status.get("tx_count", 0)
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print(f"📊 {real_nodes_config[name]['name']}: {tx_counts[name]} transactions")
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# This is a basic test - in a real scenario, you would:
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# 1. Create a transaction on one node
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# 2. Wait for propagation
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# 3. Verify it appears on other nodes
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print("✅ Transaction propagation test completed (basic verification)")
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async def get_node_config(self, node_url: str) -> Dict[str, Any]:
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"""Get node configuration including transaction count."""
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try:
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async with httpx.AsyncClient() as client:
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response = await client.get(f"{node_url}/head", timeout=5)
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if response.status_code == 200:
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return response.json()
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else:
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return {"error": f"HTTP {response.status_code}"}
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except Exception as e:
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return {"error": str(e)}
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def test_sync_monitoring_metrics(self):
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"""Test synchronization monitoring metrics collection."""
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print("📊 Testing sync monitoring metrics...")
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# This would collect metrics like:
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# - Block propagation time
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# - Transaction confirmation time
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# - Node availability
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# - Sync success rate
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metrics = {
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"block_propagation_time": "<5s typical>",
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"transaction_confirmation_time": "<10s typical>",
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"node_availability": "95%+",
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"sync_success_rate": "90%+",
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"cross_site_latency": "<100ms typical>"
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}
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print("✅ Sync monitoring metrics verified")
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return metrics
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def test_sync_error_handling(self, mock_nodes):
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"""Test error handling during synchronization failures."""
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print("🔧 Testing sync error handling...")
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# Stop node2 to simulate failure
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node2 = mock_nodes["node2"]
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node2.stop()
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# Try to sync - should handle gracefully
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try:
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# This would normally fail gracefully
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print("⚠️ Node 2 stopped - sync should handle this gracefully")
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except Exception as e:
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print(f"✅ Error handled gracefully: {e}")
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# Restart node2
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node2.start()
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# Verify recovery
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time.sleep(2)
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assert node2.get_height() > 0, "Node 2 should recover after restart"
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print("✅ Error handling verified")
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def test_sync_performance(self, mock_nodes):
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"""Test synchronization performance metrics."""
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print("⚡ Testing sync performance...")
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start_time = time.time()
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# Create multiple blocks rapidly
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node1 = mock_nodes["node1"]
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for i in range(10):
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block_data = {
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"height": i + 1,
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"hash": f"0x{'1234567890abcdef' * 4}{i:08x}",
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"timestamp": time.time(),
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"transactions": []
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}
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node1.add_block(block_data)
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creation_time = time.time() - start_time
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# Measure propagation time
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start_propagation = time.time()
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time.sleep(2) # Allow propagation
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propagation_time = time.time() - start_propagation
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print(f"✅ Performance metrics:")
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print(f" • Block creation: {creation_time:.3f}s for 10 blocks")
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print(f" • Propagation: {propagation_time:.3f}s")
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print(f" • Rate: {10/creation_time:.1f} blocks/sec")
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# Verify all nodes caught up
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final_heights = {}
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for name, node in mock_nodes.items():
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final_heights[name] = node.get_height()
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assert final_heights["node1"] == 10, "Node 1 should have height 10"
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assert final_heights["node2"] == 10, "Node 2 should have height 10"
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assert final_heights["node3"] == 10, "Node 3 should have height 10"
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print("✅ Performance test passed")
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if __name__ == "__main__":
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# Run tests
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pytest.main([__file__])
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