add database support

.gitignore

@@ -2,4 +2,5 @@
 venv/
 __pycache__/
 *.py[cod]
+*.db
 config.json

db.py

@@ -0,0 +1,49 @@
+from sqlalchemy import create_engine, Column, String, BigInteger, ForeignKey, TIMESTAMP, UniqueConstraint
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import relationship, sessionmaker
+from datetime import datetime
+
+Base = declarative_base()
+
+
+class Token(Base):
+    __tablename__ = 'tokens'
+
+    id = Column(String(42), primary_key=True)
+    name = Column(String(255), nullable=True)
+    symbol = Column(String(32), nullable=True)
+    total_supply = Column(String, nullable=True)
+
+
+class Pair(Base):
+    __tablename__ = 'pairs'
+
+    id = Column(String(42), primary_key=True)
+    token0 = Column(String(42), ForeignKey('tokens.id'), nullable=False)
+    token1 = Column(String(42), ForeignKey('tokens.id'), nullable=False)
+    created_at = Column(TIMESTAMP, default=datetime.utcnow)
+
+    # Ensuring the combination of token0, token1, and pool_address is unique
+    __table_args__ = (UniqueConstraint('token0', 'token1', name='_token_pool_uc'),)
+
+    # Relationships
+    token0_rel = relationship("Token", foreign_keys=[token0])
+    token1_rel = relationship("Token", foreign_keys=[token1])
+
+
+# Engine creation
+engine = create_engine('sqlite:///uniswap.db', echo=True)
+
+# Create tables
+Base.metadata.create_all(engine)
+
+# Create a session factory
+SessionLocal = sessionmaker(bind=engine)
+
+# Dependency to get a database session
+def get_session():
+    session = SessionLocal()
+    try:
+        yield session
+    finally:
+        session.close()

main.py

@@ -19,7 +19,10 @@ async def main():
     queue = Queue()
     bot = MatrixBot(config['matrix'])
     monitor = EventMonitor(
-        config={"infura_url": config['infura_url'], "pool_address": config['pool_address']},
+        config={
+            "infura_url": config['infura_url'],
+            "pool_address": config['pool_address']
+        },
         queue=queue
     )
     monitor_thread = threading.Thread(target=monitor.log_loop, args=(15,))

monitor.py

@@ -3,6 +3,7 @@ from queue import Queue
 from loguru import logger
 from web3 import Web3
 from util import fetch_abi
+from db import Token, Pair, get_session
 
 
 class EventMonitor:
@@ -34,6 +35,31 @@ class EventMonitor:
 
             time.sleep(interval)
 
+    def fetch_token_info(self, token_address):
+        try:
+            token_abi = fetch_abi(token_address)
+        except Exception as err:
+            logger.warning(f"Failed to fetch info for {token_address}: {err}")
+            return {
+                'name': None,
+                'symbol': None,
+                'total_supply': None
+            }
+
+        # Create the contract instance
+        token_contract = self.web3.eth.contract(address=token_address, abi=token_abi)
+
+        # Fetch the name, symbol, and total supply
+        name = token_contract.functions.name().call()
+        symbol = token_contract.functions.symbol().call()
+        total_supply = token_contract.functions.totalSupply().call()
+
+        return {
+            'name': name,
+            'symbol': symbol,
+            'total_supply': str(total_supply)
+        }
+
     def _check_connection(self):
         if self.web3.is_connected():
             logger.debug("Connected to Ethereum RPC")
@@ -43,16 +69,57 @@ class EventMonitor:
             return False
 
     def _handle_event(self, event):
-        # TODO: Get token names
+        # Get token addresses from the event
-        # TODO: Resolve token names
+        token0_address = event.args['token0']
-        # TODO: Create data structure for the event
+        token1_address = event.args['token1']
+        pair_address = event.args['pair']
 
-        token0 = event.args['token0']
+        # Try to resolve name, symbol, and supply
-        token1 = event.args['token1']
+        token0_info = self.fetch_token_info(token0_address)
+        token1_info = self.fetch_token_info(token1_address)
 
-        logger.info(f"New pair: {token0} + {token1}")
+        # Create SQLAlchemy objects
-
+        new_token0 = Token(
-        self.queue.put(
+            id=token0_address,
-            f"New Uniswap pair: https://etherscan.io/address/{token0} + https://etherscan.io/address/{token1}"
+            name=token0_info['name'],
+            symbol=token0_info['symbol'],
+            total_supply=token0_info['total_supply']
         )
+        new_token1 = Token(
+            id=token1_address,
+            name=token1_info['name'],
+            symbol=token1_info['symbol'],
+            total_supply=token1_info['total_supply']
+        )
+        new_pair = Pair(id=pair_address, token0=token0_address, token1=token1_address)
 
+        # Add token0
+        try:
+            session = next(get_session())
+            session.add(new_token0)
+            session.commit()
+        except Exception as err:
+            logger.warning(f"Could not add token0: {err}")
+
+        # Add token1
+        try:
+            session = next(get_session())
+            session.add(new_token1)
+            session.commit()
+        except Exception as err:
+            logger.warning(f"Could not add token1: {err}")
+
+        # Add pair
+        try:
+            session = next(get_session())
+            session.add(new_pair)
+            session.commit()
+        except Exception as err:
+            logger.warning(f"Could not add new pair: {err}")
+
+        # Add alert to queue
+        logger.info(f"New pair: {token0_address} + {token1_address}")
+        self.queue.put(
+            f"New Uniswap pair: [{token0_info['name']}](https://etherscan.io/address/{token0_address}) +"
+            f"[{token1_info['name']}](https://etherscan.io/address/{token1_address})"
+        )

requirements.txt

@@ -1,3 +1,4 @@
 matrix-nio
 loguru
 web3
+SQLAlchemy

util.py

@@ -23,4 +23,3 @@ def fetch_abi(address: ChecksumAddress, headers: Optional[Dict[str, Any]] = None
 def load_config(path: str) -> dict:
     with open(path, 'r', encoding='utf-8') as f:
         return json.loads(f.read())
-