Migrate blockchain-explorer and CLI to centralized aitbc package utilities

- Add DataLayer, MockDataGenerator, RealDataFetcher, and get_data_layer to aitbc package exports
- Migrate blockchain-explorer/main.py to use aitbc.get_data_layer for mock/real data toggle
- Add data layer integration to search_transactions, search_blocks, and analytics_overview endpoints
- Migrate CLI blockchain commands to use chain registry instead of hardcoded chain list
- Replace hardcoded ['ait-devnet', 'ait-testnet'] with get

aitbc/__init__.py

@@ -108,6 +108,7 @@ from .monitoring import (
     PerformanceTimer,
     HealthChecker,
 )
+from .data_layer import DataLayer, MockDataGenerator, RealDataFetcher, get_data_layer
 from .crypto import (
     derive_ethereum_address,
     sign_transaction_hash,
@@ -344,6 +345,11 @@ __all__ = [
     "vacuum_database",
     "get_table_info",
     "table_exists",
+    # Data layer
+    "DataLayer",
+    "MockDataGenerator",
+    "RealDataFetcher",
+    "get_data_layer",
     # Monitoring
     "MetricsCollector",
     "PerformanceTimer",

aitbc/data_layer.py

@@ -0,0 +1,271 @@
+"""
+Data layer abstraction for AITBC
+Provides toggle between mock and real data sources for development/testing
+"""
+
+import os
+from typing import Any, Dict, List, Optional
+from datetime import datetime
+import httpx
+
+
+class DataLayer:
+    """Data layer abstraction that can switch between mock and real data sources"""
+    
+    def __init__(self, use_mock_data: Optional[bool] = None):
+        """Initialize data layer
+        
+        Args:
+            use_mock_data: Force mock mode. If None, uses USE_MOCK_DATA env var
+        """
+        if use_mock_data is None:
+            self.use_mock_data = os.getenv("USE_MOCK_DATA", "false").lower() == "true"
+        else:
+            self.use_mock_data = use_mock_data
+        
+        self.mock_generator = MockDataGenerator()
+        self.real_fetcher = RealDataFetcher()
+    
+    async def get_transactions(
+        self,
+        address: Optional[str] = None,
+        amount_min: Optional[float] = None,
+        amount_max: Optional[float] = None,
+        tx_type: Optional[str] = None,
+        since: Optional[str] = None,
+        until: Optional[str] = None,
+        limit: int = 50,
+        offset: int = 0,
+        chain_id: str = "ait-devnet",
+        rpc_url: Optional[str] = None
+    ) -> List[Dict[str, Any]]:
+        """Get transactions from either mock or real data source"""
+        if self.use_mock_data:
+            return self.mock_generator.generate_transactions(
+                address, amount_min, amount_max, tx_type, limit
+            )
+        else:
+            return await self.real_fetcher.fetch_transactions(
+                address, amount_min, amount_max, tx_type, since, until,
+                limit, offset, chain_id, rpc_url
+            )
+    
+    async def get_blocks(
+        self,
+        validator: Optional[str] = None,
+        since: Optional[str] = None,
+        until: Optional[str] = None,
+        min_tx: Optional[int] = None,
+        limit: int = 50,
+        offset: int = 0,
+        chain_id: str = "ait-devnet",
+        rpc_url: Optional[str] = None
+    ) -> List[Dict[str, Any]]:
+        """Get blocks from either mock or real data source"""
+        if self.use_mock_data:
+            return self.mock_generator.generate_blocks(validator, min_tx, limit)
+        else:
+            return await self.real_fetcher.fetch_blocks(
+                validator, since, until, min_tx, limit, offset, chain_id, rpc_url
+            )
+    
+    async def get_analytics_overview(self, period: str = "24h", rpc_url: Optional[str] = None) -> Dict[str, Any]:
+        """Get analytics overview from either mock or real data source"""
+        if self.use_mock_data:
+            return self.mock_generator.generate_analytics(period)
+        else:
+            return await self.real_fetcher.fetch_analytics(period, rpc_url)
+
+
+class MockDataGenerator:
+    """Generates mock data for development/testing when mock mode is enabled"""
+    
+    def generate_transactions(
+        self,
+        address: Optional[str] = None,
+        amount_min: Optional[float] = None,
+        amount_max: Optional[float] = None,
+        tx_type: Optional[str] = None,
+        limit: int = 50
+    ) -> List[Dict[str, Any]]:
+        """Generate mock transaction data"""
+        from aitbc.testing import MockFactory, TestDataGenerator
+        
+        transactions = []
+        for _ in range(limit):
+            tx = TestDataGenerator.generate_transaction_data(
+                from_address=address or MockFactory.generate_ethereum_address(),
+                to_address=MockFactory.generate_ethereum_address()
+            )
+            if tx_type:
+                tx["type"] = tx_type
+            transactions.append(tx)
+        
+        return transactions
+    
+    def generate_blocks(
+        self,
+        validator: Optional[str] = None,
+        min_tx: Optional[int] = None,
+        limit: int = 50
+    ) -> List[Dict[str, Any]]:
+        """Generate mock block data"""
+        from aitbc.testing import MockFactory
+        
+        blocks = []
+        for i in range(limit):
+            blocks.append({
+                "height": 10000 + i,
+                "hash": MockFactory.generate_hash(),
+                "validator": validator or MockFactory.generate_ethereum_address(),
+                "tx_count": min_tx or 5,
+                "timestamp": datetime.utcnow().isoformat()
+            })
+        
+        return blocks
+    
+    def generate_analytics(self, period: str = "24h") -> Dict[str, Any]:
+        """Generate mock analytics data"""
+        if period == "1h":
+            labels = [f"{i:02d}:{(i*5)%60:02d}" for i in range(12)]
+            volume_values = [10 + i * 2 for i in range(12)]
+            activity_values = [5 + i for i in range(12)]
+        elif period == "24h":
+            labels = [f"{i:02d}:00" for i in range(0, 24, 2)]
+            volume_values = [50 + i * 5 for i in range(12)]
+            activity_values = [20 + i * 3 for i in range(12)]
+        elif period == "7d":
+            labels = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
+            volume_values = [500, 600, 550, 700, 800, 650, 750]
+            activity_values = [200, 250, 220, 300, 350, 280, 320]
+        else:  # 30d
+            labels = [f"Week {i+1}" for i in range(4)]
+            volume_values = [3000, 3500, 3200, 3800]
+            activity_values = [1200, 1400, 1300, 1500]
+        
+        return {
+            "total_transactions": "1,234",
+            "transaction_volume": "5,678.90 AITBC",
+            "active_addresses": "89",
+            "avg_block_time": "2.1s",
+            "volume_data": {
+                "labels": labels,
+                "values": volume_values
+            },
+            "activity_data": {
+                "labels": labels,
+                "values": activity_values
+            }
+        }
+
+
+class RealDataFetcher:
+    """Fetches real data from blockchain RPC endpoints"""
+    
+    async def fetch_transactions(
+        self,
+        address: Optional[str] = None,
+        amount_min: Optional[float] = None,
+        amount_max: Optional[float] = None,
+        tx_type: Optional[str] = None,
+        since: Optional[str] = None,
+        until: Optional[str] = None,
+        limit: int = 50,
+        offset: int = 0,
+        chain_id: str = "ait-devnet",
+        rpc_url: Optional[str] = None
+    ) -> List[Dict[str, Any]]:
+        """Fetch real transactions from blockchain RPC"""
+        if rpc_url is None:
+            rpc_url = f"http://localhost:8025"
+        
+        params = {}
+        if address:
+            params["address"] = address
+        if amount_min:
+            params["amount_min"] = amount_min
+        if amount_max:
+            params["amount_max"] = amount_max
+        if tx_type:
+            params["type"] = tx_type
+        if since:
+            params["since"] = since
+        if until:
+            params["until"] = until
+        params["limit"] = limit
+        params["offset"] = offset
+        params["chain_id"] = chain_id
+        
+        async with httpx.AsyncClient() as client:
+            response = await client.get(f"{rpc_url}/rpc/search/transactions", params=params)
+            if response.status_code == 200:
+                return response.json()
+            elif response.status_code == 404:
+                return []
+            else:
+                raise Exception(f"Failed to fetch transactions: {response.status_code}")
+    
+    async def fetch_blocks(
+        self,
+        validator: Optional[str] = None,
+        since: Optional[str] = None,
+        until: Optional[str] = None,
+        min_tx: Optional[int] = None,
+        limit: int = 50,
+        offset: int = 0,
+        chain_id: str = "ait-devnet",
+        rpc_url: Optional[str] = None
+    ) -> List[Dict[str, Any]]:
+        """Fetch real blocks from blockchain RPC"""
+        if rpc_url is None:
+            rpc_url = f"http://localhost:8025"
+        
+        params = {}
+        if validator:
+            params["validator"] = validator
+        if since:
+            params["since"] = since
+        if until:
+            params["until"] = until
+        if min_tx:
+            params["min_tx"] = min_tx
+        params["limit"] = limit
+        params["offset"] = offset
+        params["chain_id"] = chain_id
+        
+        async with httpx.AsyncClient() as client:
+            response = await client.get(f"{rpc_url}/rpc/search/blocks", params=params)
+            if response.status_code == 200:
+                return response.json()
+            elif response.status_code == 404:
+                return []
+            else:
+                raise Exception(f"Failed to fetch blocks: {response.status_code}")
+    
+    async def fetch_analytics(self, period: str = "24h", rpc_url: Optional[str] = None) -> Dict[str, Any]:
+        """Fetch real analytics from blockchain RPC"""
+        if rpc_url is None:
+            rpc_url = f"http://localhost:8025"
+        
+        params = {"period": period}
+        
+        async with httpx.AsyncClient() as client:
+            response = await client.get(f"{rpc_url}/rpc/analytics/overview", params=params)
+            if response.status_code == 200:
+                return response.json()
+            elif response.status_code == 404:
+                raise Exception("Analytics endpoint not available")
+            else:
+                raise Exception(f"Failed to fetch analytics: {response.status_code}")
+
+
+# Global data layer instance
+_data_layer: Optional[DataLayer] = None
+
+
+def get_data_layer(use_mock_data: Optional[bool] = None) -> DataLayer:
+    """Get or create global data layer instance"""
+    global _data_layer
+    if _data_layer is None:
+        _data_layer = DataLayer(use_mock_data)
+    return _data_layer

apps/blockchain-explorer/main.py

@@ -4,20 +4,28 @@ AITBC Blockchain Explorer - Enhanced Version
 Advanced web interface with search, analytics, and export capabilities
 """
 
-import asyncio
 import httpx
 import json
 import csv
 import io
 import re
 from datetime import datetime, timedelta
-from typing import Dict, List, Optional, Any, Union
-from fastapi import FastAPI, HTTPException, Request, Query, Response
-from fastapi.responses import HTMLResponse, StreamingResponse
-from fastapi.staticfiles import StaticFiles
+from typing import Optional
+import os
+
+from fastapi import FastAPI, HTTPException, Query
+from fastapi.responses import JSONResponse
+from fastapi.middleware.cors import CORSMiddleware
 from pydantic import BaseModel, Field
 import uvicorn
 
+# Import data layer for toggle between mock and real data
+try:
+    from aitbc import get_data_layer
+    USE_DATA_LAYER = True
+except ImportError:
+    USE_DATA_LAYER = False
+
 app = FastAPI(title="AITBC Blockchain Explorer", version="0.1.0")
 
 # Validation patterns for user inputs to prevent SSRF
@@ -1025,36 +1033,46 @@ async def search_transactions(
 ):
     """Advanced transaction search"""
     try:
-        # Build query parameters for blockchain node
-        params = {}
-        if address:
-            params["address"] = address
-        if amount_min:
-            params["amount_min"] = amount_min
-        if amount_max:
-            params["amount_max"] = amount_max
-        if tx_type:
-            params["type"] = tx_type
-        if since:
-            params["since"] = since
-        if until:
-            params["until"] = until
-        params["limit"] = limit
-        params["offset"] = offset
-        params["chain_id"] = chain_id
-        
-        rpc_url = BLOCKCHAIN_RPC_URLS.get(chain_id, BLOCKCHAIN_RPC_URLS[DEFAULT_CHAIN])
-        async with httpx.AsyncClient() as client:
-            response = await client.get(f"{rpc_url}/rpc/search/transactions", params=params)
-            if response.status_code == 200:
-                return response.json()
-            elif response.status_code == 404:
-                return []
-            else:
-                raise HTTPException(
-                    status_code=response.status_code,
-                    detail=f"Failed to fetch transactions from blockchain RPC: {response.text}"
-                )
+        if USE_DATA_LAYER:
+            # Use data layer with toggle support
+            data_layer = get_data_layer()
+            rpc_url = BLOCKCHAIN_RPC_URLS.get(chain_id, BLOCKCHAIN_RPC_URLS[DEFAULT_CHAIN])
+            return await data_layer.get_transactions(
+                address, amount_min, amount_max, tx_type, since, until,
+                limit, offset, chain_id, rpc_url
+            )
+        else:
+            # Original implementation without data layer
+            # Build query parameters
+            params = {}
+            if address:
+                params["address"] = address
+            if amount_min:
+                params["amount_min"] = amount_min
+            if amount_max:
+                params["amount_max"] = amount_max
+            if tx_type:
+                params["type"] = tx_type
+            if since:
+                params["since"] = since
+            if until:
+                params["until"] = until
+            params["limit"] = limit
+            params["offset"] = offset
+            params["chain_id"] = chain_id
+            
+            rpc_url = BLOCKCHAIN_RPC_URLS.get(chain_id, BLOCKCHAIN_RPC_URLS[DEFAULT_CHAIN])
+            async with httpx.AsyncClient() as client:
+                response = await client.get(f"{rpc_url}/rpc/search/transactions", params=params)
+                if response.status_code == 200:
+                    return response.json()
+                elif response.status_code == 404:
+                    return []
+                else:
+                    raise HTTPException(
+                        status_code=response.status_code,
+                        detail=f"Failed to fetch transactions from blockchain RPC: {response.text}"
+                    )
     except httpx.RequestError as e:
         raise HTTPException(status_code=503, detail=f"Blockchain RPC unavailable: {str(e)}")
     except Exception as e:
@@ -1072,32 +1090,40 @@ async def search_blocks(
 ):
     """Advanced block search"""
     try:
-        # Build query parameters
-        params = {}
-        if validator:
-            params["validator"] = validator
-        if since:
-            params["since"] = since
-        if until:
-            params["until"] = until
-        if min_tx:
-            params["min_tx"] = min_tx
-        params["limit"] = limit
-        params["offset"] = offset
-        params["chain_id"] = chain_id
-        
-        rpc_url = BLOCKCHAIN_RPC_URLS.get(chain_id, BLOCKCHAIN_RPC_URLS[DEFAULT_CHAIN])
-        async with httpx.AsyncClient() as client:
-            response = await client.get(f"{rpc_url}/rpc/search/blocks", params=params)
-            if response.status_code == 200:
-                return response.json()
-            elif response.status_code == 404:
-                return []
-            else:
-                raise HTTPException(
-                    status_code=response.status_code,
-                    detail=f"Failed to fetch blocks from blockchain RPC: {response.text}"
-                )
+        if USE_DATA_LAYER:
+            # Use data layer with toggle support
+            data_layer = get_data_layer()
+            rpc_url = BLOCKCHAIN_RPC_URLS.get(chain_id, BLOCKCHAIN_RPC_URLS[DEFAULT_CHAIN])
+            return await data_layer.get_blocks(
+                validator, since, until, min_tx, limit, offset, chain_id, rpc_url
+            )
+        else:
+            # Original implementation without data layer
+            params = {}
+            if validator:
+                params["validator"] = validator
+            if since:
+                params["since"] = since
+            if until:
+                params["until"] = until
+            if min_tx:
+                params["min_tx"] = min_tx
+            params["limit"] = limit
+            params["offset"] = offset
+            params["chain_id"] = chain_id
+            
+            rpc_url = BLOCKCHAIN_RPC_URLS.get(chain_id, BLOCKCHAIN_RPC_URLS[DEFAULT_CHAIN])
+            async with httpx.AsyncClient() as client:
+                response = await client.get(f"{rpc_url}/rpc/search/blocks", params=params)
+                if response.status_code == 200:
+                    return response.json()
+                elif response.status_code == 404:
+                    return []
+                else:
+                    raise HTTPException(
+                        status_code=response.status_code,
+                        detail=f"Failed to fetch blocks from blockchain RPC: {response.text}"
+                    )
     except httpx.RequestError as e:
         raise HTTPException(status_code=503, detail=f"Blockchain RPC unavailable: {str(e)}")
     except Exception as e:
@@ -1105,42 +1131,31 @@ async def search_blocks(
 
 @app.get("/api/analytics/overview")
 async def analytics_overview(period: str = "24h"):
-    """Get analytics overview"""
+    """Get analytics overview from blockchain RPC"""
     try:
-        # Generate mock analytics data
-        now = datetime.now()
-        
-        if period == "1h":
-            labels = [f"{i:02d}:{(i*5)%60:02d}" for i in range(12)]
-            volume_values = [10 + i * 2 for i in range(12)]
-            activity_values = [5 + i for i in range(12)]
-        elif period == "24h":
-            labels = [f"{i:02d}:00" for i in range(0, 24, 2)]
-            volume_values = [50 + i * 5 for i in range(12)]
-            activity_values = [20 + i * 3 for i in range(12)]
-        elif period == "7d":
-            labels = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
-            volume_values = [500, 600, 550, 700, 800, 650, 750]
-            activity_values = [200, 250, 220, 300, 350, 280, 320]
-        else:  # 30d
-            labels = [f"Week {i+1}" for i in range(4)]
-            volume_values = [3000, 3500, 3200, 3800]
-            activity_values = [1200, 1400, 1300, 1500]
-        
-        return {
-            "total_transactions": "1,234",
-            "transaction_volume": "5,678.90 AITBC",
-            "active_addresses": "89",
-            "avg_block_time": "2.1s",
-            "volume_data": {
-                "labels": labels,
-                "values": volume_values
-            },
-            "activity_data": {
-                "labels": labels,
-                "values": activity_values
-            }
-        }
+        if USE_DATA_LAYER:
+            # Use data layer with toggle support
+            data_layer = get_data_layer()
+            rpc_url = BLOCKCHAIN_RPC_URLS.get(DEFAULT_CHAIN)
+            return await data_layer.get_analytics_overview(period, rpc_url)
+        else:
+            # Original implementation without data layer
+            rpc_url = BLOCKCHAIN_RPC_URLS.get(DEFAULT_CHAIN)
+            params = {"period": period}
+            
+            async with httpx.AsyncClient() as client:
+                response = await client.get(f"{rpc_url}/rpc/analytics/overview", params=params)
+                if response.status_code == 200:
+                    return response.json()
+                elif response.status_code == 404:
+                    raise HTTPException(status_code=501, detail="Analytics endpoint not available on blockchain RPC")
+                else:
+                    raise HTTPException(
+                        status_code=response.status_code,
+                        detail=f"Failed to fetch analytics from blockchain RPC: {response.text}"
+                    )
+    except httpx.RequestError as e:
+        raise HTTPException(status_code=503, detail=f"Blockchain RPC unavailable: {str(e)}")
     except Exception as e:
         raise HTTPException(status_code=500, detail=f"Analytics failed: {str(e)}")
 

cli/commands/blockchain.py

@@ -37,8 +37,10 @@ def blocks(ctx, limit: int, from_height: Optional[int], chain_id: str, all_chain
         config = ctx.obj['config']
         
         if all_chains:
-            # Query all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             all_blocks = {}
             
             for chain in chains:
@@ -148,7 +150,10 @@ def block(ctx, block_hash: str, chain_id: str, all_chains: bool):
         
         if all_chains:
             # Search for block across all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             block_results = {}
             
             for chain in chains:
@@ -246,7 +251,10 @@ def transaction(ctx, tx_hash: str, chain_id: str, all_chains: bool):
     try:
         if all_chains:
             # Search for transaction across all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             tx_results = {}
             
             for chain in chains:
@@ -328,7 +336,10 @@ def status(ctx, node: int, chain_id: str, all_chains: bool):
     try:
         if all_chains:
             # Get status across all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             all_status = {}
             
             for chain in chains:
@@ -420,7 +431,10 @@ def sync_status(ctx, chain_id: str, all_chains: bool):
     try:
         if all_chains:
             # Get sync status across all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             all_sync_status = {}
             
             for chain in chains:
@@ -505,7 +519,10 @@ def peers(ctx, chain_id: str, all_chains: bool):
         
         if all_chains:
             # Get peers across all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             all_peers = {}
             
             for chain in chains:
@@ -594,7 +611,10 @@ def info(ctx, chain_id: str, all_chains: bool):
         
         if all_chains:
             # Get info across all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             all_info = {}
             
             for chain in chains:
@@ -690,7 +710,10 @@ def supply(ctx, chain_id: str, all_chains: bool):
         
         if all_chains:
             # Get supply across all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             all_supply = {}
             
             for chain in chains:
@@ -773,7 +796,10 @@ def validators(ctx, chain_id: str, all_chains: bool):
         
         if all_chains:
             # Get validators across all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             all_validators = {}
             
             for chain in chains:
@@ -959,7 +985,10 @@ def balance(ctx, address, chain_id, all_chains):
         
         if all_chains:
             # Query all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             balances = {}
             
             with httpx.Client() as client:
@@ -1180,7 +1209,10 @@ def state(ctx, chain_id: str, all_chains: bool):
     try:
         if all_chains:
             # Get state across all available chains
-            chains = ['ait-devnet', 'ait-testnet']  # TODO: Get from chain registry
+            # Query all available chains from chain registry
+            from cli.config.chains import get_chain_registry
+            registry = get_chain_registry()
+            chains = registry.get_chain_ids()
             all_state = {}
             
             for chain in chains:

docs/development/mock-data-system.md

@@ -0,0 +1,329 @@
+# Mock Data and Placeholder System Documentation
+
+This document describes the mock data and placeholder systems in AITBC, including the toggle system for development/testing, data layer abstraction, testing utilities, and chain registry configuration.
+
+## Overview
+
+The AITBC codebase previously contained mock data and placeholders in various locations. These have been systematically cleaned up and organized into a proper mock data system with a toggle for development and testing.
+
+## Data Layer Abstraction
+
+### Purpose
+
+The data layer provides a clean abstraction between mock and real data sources, allowing developers to switch between mock data (for development/testing) and real blockchain data (for production).
+
+### Usage
+
+The data layer is implemented in `aitbc/data_layer.py` and provides three main classes:
+
+- **DataLayer**: Main abstraction layer that switches between mock and real data sources
+- **MockDataGenerator**: Generates mock data when mock mode is enabled
+- **RealDataFetcher**: Fetches real data from blockchain RPC endpoints
+
+### Configuration
+
+Toggle mock data mode using the `USE_MOCK_DATA` environment variable:
+
+```bash
+# Enable mock data mode (for development/testing)
+export USE_MOCK_DATA=true
+
+# Disable mock data mode (use real data - default)
+export USE_MOCK_DATA=false
+```
+
+### Example Usage
+
+```python
+from aitbc import get_data_layer
+
+# Get data layer instance (respects USE_MOCK_DATA env var)
+data_layer = get_data_layer()
+
+# Get transactions (will use mock or real data based on config)
+transactions = await data_layer.get_transactions(
+    address="0x123...",
+    limit=50,
+    chain_id="ait-devnet",
+    rpc_url="http://localhost:8025"
+)
+
+# Get blocks
+blocks = await data_layer.get_blocks(
+    validator="0xabc...",
+    limit=50,
+    chain_id="ait-devnet"
+)
+
+# Get analytics
+analytics = await data_layer.get_analytics_overview(period="24h")
+```
+
+### Force Mode
+
+You can also force a specific mode programmatically:
+
+```python
+from aitbc import DataLayer
+
+# Force mock mode
+data_layer = DataLayer(use_mock_data=True)
+
+# Force real data mode
+data_layer = DataLayer(use_mock_data=False)
+```
+
+## Blockchain Explorer Integration
+
+The blockchain explorer (`apps/blockchain-explorer/main.py`) has been updated to use the data layer when available. It falls back to direct RPC calls if the data layer is not available.
+
+### Endpoints Updated
+
+- `/api/search/transactions` - Uses data layer for transaction search
+- `/api/search/blocks` - Uses data layer for block search
+- `/api/analytics/overview` - Uses data layer for analytics data
+
+## Chain Registry Configuration
+
+### Purpose
+
+The chain registry provides a centralized configuration for blockchain networks, replacing hardcoded chain lists throughout the codebase.
+
+### Location
+
+Configuration file: `cli/config/chains.py`
+
+### Usage
+
+```python
+from cli.config.chains import get_chain_registry
+
+# Get global chain registry
+registry = get_chain_registry()
+
+# Get all chains
+chains = registry.get_chain_ids()
+
+# Get specific chain
+chain = registry.get_chain("ait-devnet")
+
+# Get testnet chains only
+testnets = registry.get_testnet_chains()
+
+# Get mainnet chains only
+mainnets = registry.get_mainnet_chains()
+```
+
+### Environment Variable Configuration
+
+You can add custom chains via environment variables:
+
+```bash
+export AITBC_CHAIN_MYCHAIN_NAME="My Custom Chain"
+export AITBC_CHAIN_MYCHAIN_RPC_URL="http://localhost:8030"
+export AITBC_CHAIN_MYCHAIN_EXPLORER_URL="http://localhost:8031"
+export AITBC_CHAIN_MYCHAIN_IS_TESTNET="true"
+export AITBC_CHAIN_MYCHAIN_NATIVE_CURRENCY="AITBC"
+```
+
+### Default Chains
+
+The registry comes with two default chains:
+
+- **ait-devnet**: Development network (localhost:8025)
+- **ait-testnet**: Test network (localhost:8027)
+
+## Testing Utilities
+
+### Purpose
+
+The `aitbc.testing` module provides standardized testing utilities for generating mock data across the codebase.
+
+### Components
+
+- **MockFactory**: Generates mock strings, emails, URLs, hashes, and Ethereum addresses
+- **TestDataGenerator**: Generates structured test data (users, transactions, wallets, etc.)
+- **MockResponse**: Mock HTTP response object for testing
+- **MockDatabase**: Mock database for testing
+- **MockCache**: Mock cache for testing
+- **TestHelpers**: Helper functions for common test scenarios
+
+### Usage in Tests
+
+```python
+from aitbc.testing import MockFactory, TestDataGenerator, MockResponse
+
+# Generate mock data
+email = MockFactory.generate_email()
+url = MockFactory.generate_url()
+eth_address = MockFactory.generate_ethereum_address()
+
+# Generate structured test data
+user_data = TestDataGenerator.generate_user_data()
+transaction_data = TestDataGenerator.generate_transaction_data()
+wallet_data = TestDataGenerator.generate_wallet_data()
+
+# Create mock HTTP response
+mock_response = MockResponse(
+    status_code=200,
+    json_data={"result": "success"},
+    text="success"
+)
+```
+
+### Pytest Fixtures
+
+The `tests/conftest.py` file has been updated with reusable fixtures:
+
+```python
+@pytest.fixture
+def mock_db():
+    """Create a mock database for testing"""
+    return MockDatabase()
+
+@pytest.fixture
+def mock_cache():
+    """Create a mock cache for testing"""
+    return MockCache()
+
+@pytest.fixture
+def test_user_data():
+    """Generate test user data using TestDataGenerator"""
+    return TestDataGenerator.generate_user_data()
+
+@pytest.fixture
+def test_ethereum_address():
+    """Generate a test Ethereum address using MockFactory"""
+    return MockFactory.generate_ethereum_address()
+```
+
+## Agent SDK Implementation
+
+### Compute Consumer
+
+The `compute_consumer.py` module has been updated to use the coordinator API for job submission and status queries:
+
+- `submit_job()`: Submits jobs to coordinator API at `/v1/jobs`
+- `get_job_status()`: Queries job status from coordinator API at `/v1/jobs/{job_id}`
+
+### Swarm Coordinator
+
+The `swarm_coordinator.py` module has been updated to use coordinator APIs for various operations:
+
+- `_get_load_balancing_data()`: Fetches from `/v1/load-balancing/metrics`
+- `_get_pricing_data()`: Fetches from `/v1/marketplace/pricing/trends`
+- `_get_security_data()`: Fetches from `/v1/security/metrics`
+- `_register_with_swarm()`: Registers via `/v1/swarm/{swarm_id}/register`
+- `_broadcast_to_swarm_network()`: Broadcasts via `/v1/swarm/{swarm_id}/broadcast`
+- `_process_swarm_messages()`: Processes messages from `/v1/swarm/{swarm_id}/messages`
+- `_participate_in_decisions()`: Participates via `/v1/swarm/{swarm_id}/decisions/participate`
+- `_submit_coordination_proposal()`: Submits via `/v1/swarm/coordination/proposals`
+
+All methods include fallback to default data when the coordinator API is unavailable.
+
+## Migration Guide
+
+### For Existing Code
+
+1. **Replace hardcoded chain lists**:
+   ```python
+   # Old
+   chains = ['ait-devnet', 'ait-testnet']
+   
+   # New
+   from cli.config.chains import get_chain_registry
+   registry = get_chain_registry()
+   chains = registry.get_chain_ids()
+   ```
+
+2. **Use data layer for data fetching**:
+   ```python
+   # Old
+   response = await client.get(f"{rpc_url}/rpc/transactions")
+   data = response.json()
+   
+   # New
+   from aitbc import get_data_layer
+   data_layer = get_data_layer()
+   data = await data_layer.get_transactions(rpc_url=rpc_url)
+   ```
+
+3. **Use testing utilities in tests**:
+   ```python
+   # Old
+   mock_address = "0x1234567890abcdef"
+   
+   # New
+   from aitbc.testing import MockFactory
+   mock_address = MockFactory.generate_ethereum_address()
+   ```
+
+### For New Code
+
+1. Always use the chain registry for chain configuration
+2. Use the data layer for all data fetching operations
+3. Use testing utilities for generating mock data in tests
+4. Implement proper error handling with fallbacks when external APIs are unavailable
+
+## Architecture Diagram
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                     Application Layer                         │
+│  (Blockchain Explorer, CLI, Agent SDK, etc.)                │
+└────────────────────┬────────────────────────────────────────┘
+                     │
+                     ▼
+┌─────────────────────────────────────────────────────────────┐
+│                    Data Layer Abstraction                     │
+│  (aitbc/data_layer.py)                                      │
+│  - USE_MOCK_DATA environment variable                        │
+│  - Switches between mock and real data sources               │
+└──────────┬────────────────────────────┬──────────────────────┘
+           │                            │
+           ▼                            ▼
+┌──────────────────────┐    ┌──────────────────────────┐
+│  MockDataGenerator   │    │   RealDataFetcher        │
+│  (aitbc/data_layer)   │    │   (aitbc/data_layer)     │
+│  - Generates mock     │    │   - Fetches from RPC     │
+│    data for testing   │    │   - Blockchain RPC calls  │
+└──────────────────────┘    └──────────────────────────┘
+```
+
+## Best Practices
+
+1. **Always use the data layer**: Never bypass the data layer for data fetching
+2. **Test both modes**: Ensure code works with both mock and real data
+3. **Use proper error handling**: Include fallbacks when APIs are unavailable
+4. **Document mock data**: Clearly indicate when data is mock vs real
+5. **Keep mock data realistic**: Mock data should resemble real data structure
+6. **Use testing utilities**: Standardize mock data generation across tests
+7. **Configure chains properly**: Use chain registry for all chain configuration
+
+## Troubleshooting
+
+### Mock Data Not Working
+
+- Check `USE_MOCK_DATA` environment variable is set to `true`
+- Verify data layer is properly imported
+- Check logs for import errors
+
+### Chain Registry Issues
+
+- Verify chain IDs match expected format
+- Check environment variable configuration
+- Ensure coordinator URL is accessible
+
+### Testing Utilities Not Available
+
+- Verify `aitbc.testing` module is in Python path
+- Check imports in `tests/conftest.py`
+- Ensure dependencies are installed
+
+## References
+
+- Data layer implementation: `aitbc/data_layer.py`
+- Chain registry: `cli/config/chains.py`
+- Testing utilities: `aitbc/testing.py`
+- Blockchain explorer: `apps/blockchain-explorer/main.py`
+- Agent SDK: `packages/py/aitbc-agent-sdk/src/aitbc_agent/`

tests/conftest.py

@@ -18,6 +18,9 @@ sys.path.insert(0, str(project_root / "aitbc"))
 # Import aitbc utilities for conftest
 from aitbc import DATA_DIR, LOG_DIR
 
+# Import new testing utilities
+from aitbc.testing import MockFactory, TestDataGenerator, MockResponse, MockDatabase, MockCache
+
 # Add necessary source paths
 sys.path.insert(0, str(project_root / "packages" / "py" / "aitbc-core" / "src"))
 sys.path.insert(0, str(project_root / "packages" / "py" / "aitbc-crypto" / "src"))
@@ -110,91 +113,77 @@ def coordinator_client():
         return TestClient(coordinator_app)
     except ImportError as e:
         # Create a mock client if imports fail
-        from unittest.mock import Mock
         print(f"Warning: Using mock coordinator_client due to import error: {e}")
+        
+        # Use new MockResponse from aitbc.testing
+        mock_response = MockResponse(
+            status_code=201,
+            json_data={
+                "job_id": "test-job-123",
+                "state": "QUEUED",
+                "assigned_miner_id": None,
+                "requested_at": "2026-01-26T18:00:00.000000",
+                "expires_at": "2026-01-26T18:15:00.000000",
+                "error": None,
+                "payment_id": "test-payment-456",
+                "payment_status": "escrowed"
+            }
+        )
+        
         mock_client = Mock()
-        
-        # Mock response objects that match real API structure
-        mock_response = Mock()
-        mock_response.status_code = 201
-        mock_response.json.return_value = {
-            "job_id": "test-job-123",
-            "state": "QUEUED",
-            "assigned_miner_id": None,
-            "requested_at": "2026-01-26T18:00:00.000000",
-            "expires_at": "2026-01-26T18:15:00.000000",
-            "error": None,
-            "payment_id": "test-payment-456",
-            "payment_status": "escrowed"
-        }
-        
-        # Configure mock methods
         mock_client.post.return_value = mock_response
         
-        # Mock for GET requests
-        mock_get_response = Mock()
-        mock_get_response.status_code = 200
-        mock_get_response.json.return_value = {
-            "job_id": "test-job-123",
-            "state": "QUEUED",
-            "assigned_miner_id": None,
-            "requested_at": "2026-01-26T18:00:00.000000",
-            "expires_at": "2026-01-26T18:15:00.000000",
-            "error": None,
-            "payment_id": "test-payment-456",
-            "payment_status": "escrowed"
-        }
-        mock_get_response.text = '{"openapi": "3.0.0", "info": {"title": "AITBC Coordinator API"}}'
+        # Use TestDataGenerator for consistent test data
+        mock_get_response = MockResponse(
+            status_code=200,
+            json_data={
+                "job_id": "test-job-123",
+                "state": "QUEUED",
+                "assigned_miner_id": None,
+                "requested_at": "2026-01-26T18:00:00.000000",
+                "expires_at": "2026-01-26T18:15:00.000000",
+                "error": None,
+                "payment_id": "test-payment-456",
+                "payment_status": "escrowed"
+            }
+        )
         mock_client.get.return_value = mock_get_response
         
         # Mock for receipts
-        mock_receipts_response = Mock()
-        mock_receipts_response.status_code = 200
-        mock_receipts_response.json.return_value = {
-            "items": [],
-            "total": 0
-        }
-        mock_receipts_response.text = '{"items": [], "total": 0}'
+        mock_receipts_response = MockResponse(
+            status_code=200,
+            json_data={
+                "items": [],
+                "total": 0
+            }
+        )
         
         def mock_get_side_effect(url, headers=None):
             if "receipts" in url:
                 return mock_receipts_response
             elif "/docs" in url or "/openapi.json" in url:
-                docs_response = Mock()
-                docs_response.status_code = 200
-                docs_response.text = '{"openapi": "3.0.0", "info": {"title": "AITBC Coordinator API"}}'
-                return docs_response
+                return MockResponse(status_code=200, text='{"openapi": "3.0.0", "info": {"title": "AITBC Coordinator API"}}')
             elif "/v1/health" in url:
-                health_response = Mock()
-                health_response.status_code = 200
-                health_response.json.return_value = {
-                    "status": "ok",
-                    "env": "dev"
-                }
-                return health_response
+                return MockResponse(status_code=200, json_data={"status": "ok", "env": "dev"})
             elif "/payment" in url:
-                payment_response = Mock()
-                payment_response.status_code = 200
-                payment_response.json.return_value = {
-                    "job_id": "test-job-123",
-                    "payment_id": "test-payment-456",
-                    "amount": 100,
-                    "currency": "AITBC",
-                    "status": "escrowed",
-                    "payment_method": "aitbc_token",
-                    "escrow_address": "test-escrow-id",
-                    "created_at": "2026-01-26T18:00:00.000000",
-                    "updated_at": "2026-01-26T18:00:00.000000"
-                }
-                return payment_response
+                return MockResponse(
+                    status_code=200,
+                    json_data={
+                        "job_id": "test-job-123",
+                        "payment_id": "test-payment-456",
+                        "amount": 100,
+                        "currency": "AITBC",
+                        "status": "escrowed",
+                        "payment_method": "aitbc_token",
+                        "escrow_address": "test-escrow-id",
+                        "created_at": "2026-01-26T18:00:00.000000",
+                        "updated_at": "2026-01-26T18:00:00.000000"
+                    }
+                )
             return mock_get_response
         
         mock_client.get.side_effect = mock_get_side_effect
-        
-        mock_client.patch.return_value = Mock(
-            status_code=200,
-            json=lambda: {"status": "updated"}
-        )
+        mock_client.patch.return_value = MockResponse(status_code=200, json_data={"status": "updated"})
         return mock_client
 
 
@@ -283,18 +272,18 @@ def marketplace_client():
 
 @pytest.fixture
 def sample_tenant():
-    """Create a sample tenant for testing"""
-    return {
-        "id": "tenant-123",
-        "name": "Test Tenant",
-        "created_at": pytest.helpers.utc_now(),
-        "status": "active"
-    }
+    """Create a sample tenant for testing using TestDataGenerator"""
+    return TestDataGenerator.generate_user_data(
+        id="tenant-123",
+        first_name="Test",
+        last_name="Tenant",
+        is_active=True
+    )
 
 
 @pytest.fixture
 def sample_job_data():
-    """Sample job creation data"""
+    """Sample job creation data using TestDataGenerator"""
     return {
         "job_type": "ai_inference",
         "parameters": {
@@ -306,3 +295,39 @@ def sample_job_data():
         "priority": "normal",
         "timeout": 300
     }
+
+
+@pytest.fixture
+def mock_db():
+    """Create a mock database for testing"""
+    return MockDatabase()
+
+
+@pytest.fixture
+def mock_cache():
+    """Create a mock cache for testing"""
+    return MockCache()
+
+
+@pytest.fixture
+def test_user_data():
+    """Generate test user data using TestDataGenerator"""
+    return TestDataGenerator.generate_user_data()
+
+
+@pytest.fixture
+def test_transaction_data():
+    """Generate test transaction data using TestDataGenerator"""
+    return TestDataGenerator.generate_transaction_data()
+
+
+@pytest.fixture
+def test_wallet_data():
+    """Generate test wallet data using TestDataGenerator"""
+    return TestDataGenerator.generate_wallet_data()
+
+
+@pytest.fixture
+def test_ethereum_address():
+    """Generate a test Ethereum address using MockFactory"""
+    return MockFactory.generate_ethereum_address()