get rid of sql_alchemy

contrib/requirements/requirements.txt

@@ -11,4 +11,3 @@ aiohttp_socks
 certifi
 bitstring
 pycryptodomex>=3.7
-sqlalchemy>=1.3.0b3

electrum/channel_db.py

@@ -36,10 +36,6 @@ from typing import Sequence, List, Tuple, Optional, Dict, NamedTuple, TYPE_CHECK
 import binascii
 import base64
 
-from sqlalchemy import Column, ForeignKey, Integer, String, Boolean
-from sqlalchemy.orm.query import Query
-from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy.sql import not_, or_
 
 from .sql_db import SqlDB, sql
 from . import constants
@@ -66,7 +62,6 @@ def validate_features(features : int):
         if (1 << fbit) not in LN_GLOBAL_FEATURES_KNOWN_SET and fbit % 2 == 0:
             raise UnknownEvenFeatureBits()
 
-Base = declarative_base()
 
 FLAG_DISABLE   = 1 << 1
 FLAG_DIRECTION = 1 << 0
@@ -193,57 +188,45 @@ class Address(NamedTuple):
     port: int
     last_connected_date: int
 
-
-class ChannelInfoBase(Base):
-    __tablename__ = 'channel_info'
-    short_channel_id = Column(String(64), primary_key=True, sqlite_on_conflict_primary_key='REPLACE')
-    node1_id = Column(String(66), ForeignKey('node_info.node_id'), nullable=False)
-    node2_id = Column(String(66), ForeignKey('node_info.node_id'), nullable=False)
-    capacity_sat = Column(Integer)
-    def to_nametuple(self):
-        return ChannelInfo(
-            short_channel_id=self.short_channel_id,
-            node1_id=self.node1_id,
-            node2_id=self.node2_id,
-            capacity_sat=self.capacity_sat
-        )
-
-class PolicyBase(Base):
-    __tablename__ = 'policy'
-    key                         = Column(String(66), primary_key=True, sqlite_on_conflict_primary_key='REPLACE')
-    cltv_expiry_delta           = Column(Integer, nullable=False)
-    htlc_minimum_msat           = Column(Integer, nullable=False)
-    htlc_maximum_msat           = Column(Integer)
-    fee_base_msat               = Column(Integer, nullable=False)
-    fee_proportional_millionths = Column(Integer, nullable=False)
-    channel_flags               = Column(Integer, nullable=False)
-    timestamp                   = Column(Integer, nullable=False)
-
-    def to_nametuple(self):
-        return Policy(
-            key=self.key,
-            cltv_expiry_delta=self.cltv_expiry_delta,
-            htlc_minimum_msat=self.htlc_minimum_msat,
-            htlc_maximum_msat=self.htlc_maximum_msat,
-            fee_base_msat= self.fee_base_msat,
-            fee_proportional_millionths = self.fee_proportional_millionths,
-            channel_flags=self.channel_flags,
-            timestamp=self.timestamp
-        )
-
-class NodeInfoBase(Base):
-    __tablename__ = 'node_info'
-    node_id = Column(String(66), primary_key=True, sqlite_on_conflict_primary_key='REPLACE')
-    features = Column(Integer, nullable=False)
-    timestamp = Column(Integer, nullable=False)
-    alias = Column(String(64), nullable=False)
-
-class AddressBase(Base):
-    __tablename__ = 'address'
-    node_id = Column(String(66), primary_key=True, sqlite_on_conflict_primary_key='REPLACE')
-    host = Column(String(256))
-    port = Column(Integer)
-    last_connected_date = Column(Integer(), nullable=True)
+create_channel_info = """
+CREATE TABLE IF NOT EXISTS channel_info (
+short_channel_id VARCHAR(64),
+node1_id VARCHAR(66),
+node2_id VARCHAR(66),
+capacity_sat INTEGER,
+PRIMARY KEY(short_channel_id)
+)"""
+
+create_policy = """
+CREATE TABLE IF NOT EXISTS policy (
+key VARCHAR(66),
+cltv_expiry_delta INTEGER NOT NULL,
+htlc_minimum_msat INTEGER NOT NULL,
+htlc_maximum_msat INTEGER,
+fee_base_msat INTEGER NOT NULL,
+fee_proportional_millionths INTEGER NOT NULL,
+channel_flags INTEGER NOT NULL,
+timestamp INTEGER NOT NULL,
+PRIMARY KEY(key)
+)"""
+
+create_address = """
+CREATE TABLE IF NOT EXISTS address (
+node_id VARCHAR(66),
+host STRING(256),
+port INTEGER NOT NULL,
+timestamp INTEGER,
+PRIMARY KEY(node_id, host, port)
+)"""
+
+create_node_info = """
+CREATE TABLE IF NOT EXISTS node_info (
+node_id VARCHAR(66),
+features INTEGER NOT NULL,
+timestamp INTEGER NOT NULL,
+alias STRING(64),
+PRIMARY KEY(node_id)
+)"""
 
 
 class ChannelDB(SqlDB):
@@ -252,7 +235,7 @@ class ChannelDB(SqlDB):
 
     def __init__(self, network: 'Network'):
         path = os.path.join(get_headers_dir(network.config), 'channel_db')
-        super().__init__(network, path, Base, commit_interval=100)
+        super().__init__(network, path, commit_interval=100)
         self.num_nodes = 0
         self.num_channels = 0
         self._channel_updates_for_private_channels = {}  # type: Dict[Tuple[bytes, bytes], dict]
@@ -276,16 +259,7 @@ class ChannelDB(SqlDB):
         now = int(time.time())
         node_id = peer.pubkey
         self._addresses[node_id].add((peer.host, peer.port, now))
-        self.save_address(node_id, peer, now)
-
-    @sql
-    def save_address(self, node_id, peer, now):
-        addr = self.DBSession.query(AddressBase).filter_by(node_id=node_id, host=peer.host, port=peer.port).one_or_none()
-        if addr:
-            addr.last_connected_date = now
-        else:
-            addr = AddressBase(node_id=node_id, host=peer.host, port=peer.port, last_connected_date=now)
-            self.DBSession.add(addr)
+        self.save_node_address(node_id, peer, now)
 
     def get_200_randomly_sorted_nodes_not_in(self, node_ids):
         unshuffled = set(self._nodes.keys()) - node_ids
@@ -394,17 +368,47 @@ class ChannelDB(SqlDB):
         orphaned, expired, deprecated, good, to_delete = self.add_channel_updates([payload], verify=False)
         assert len(good) == 1
 
+    def create_database(self):
+        c = self.conn.cursor()
+        c.execute(create_node_info)
+        c.execute(create_address)
+        c.execute(create_policy)
+        c.execute(create_channel_info)
+        self.conn.commit()
+
     @sql
     def save_policy(self, policy):
-        self.DBSession.execute(PolicyBase.__table__.insert().values(policy))
+        c = self.conn.cursor()
+        c.execute("""REPLACE INTO policy (key, cltv_expiry_delta, htlc_minimum_msat, htlc_maximum_msat, fee_base_msat, fee_proportional_millionths, channel_flags, timestamp) VALUES (?,?,?,?,?,?, ?, ?)""", list(policy))
 
     @sql
     def delete_policy(self, short_channel_id, node_id):
-        self.DBSession.execute(PolicyBase.__table__.delete().values(policy))
+        c = self.conn.cursor()
+        c.execute("""DELETE FROM policy WHERE key=?""", (key,))
 
     @sql
     def save_channel(self, channel_info):
-        self.DBSession.execute(ChannelInfoBase.__table__.insert().values(channel_info))
+        c = self.conn.cursor()
+        c.execute("REPLACE INTO channel_info (short_channel_id, node1_id, node2_id, capacity_sat) VALUES (?,?,?,?)", list(channel_info))
+
+    @sql
+    def save_node(self, node_info):
+        c = self.conn.cursor()
+        c.execute("REPLACE INTO node_info (node_id, features, timestamp, alias) VALUES (?,?,?,?)", list(node_info))
+
+    @sql
+    def save_node_address(self, node_id, peer, now):
+        c = self.conn.cursor()
+        c.execute("REPLACE INTO address (node_id, host, port, timestamp) VALUES (?,?,?,?)", (node_id, peer.host, peer.port, now))
+
+    @sql
+    def save_node_addresses(self, node_id, node_addresses):
+        c = self.conn.cursor()
+        for addr in node_addresses:
+            c.execute("SELECT * FROM address WHERE node_id=? AND host=? AND port=?", (addr.node_id, addr.host, addr.port))
+            r = c.fetchall()
+            if r == []:
+                c.execute("INSERT INTO address (node_id, host, port, timestamp) VALUES (?,?,?,?)", (addr.node_id, addr.host, addr.port, 0))
 
     def verify_channel_update(self, payload):
         short_channel_id = payload['short_channel_id']
@@ -418,7 +422,6 @@ class ChannelDB(SqlDB):
             msg_payloads = [msg_payloads]
         old_addr = None
         new_nodes = {}
-        new_addresses = {}
         for msg_payload in msg_payloads:
             try:
                 node_info, node_addresses = NodeInfo.from_msg(msg_payload)
@@ -445,17 +448,6 @@ class ChannelDB(SqlDB):
         self.logger.debug("on_node_announcement: %d/%d"%(len(new_nodes), len(msg_payloads)))
         self.update_counts()
 
-    @sql
-    def save_node_addresses(self, node_if, node_addresses):
-        for new_addr in node_addresses:
-            old_addr = self.DBSession.query(AddressBase).filter_by(node_id=new_addr.node_id, host=new_addr.host, port=new_addr.port).one_or_none()
-            if not old_addr:
-                self.DBSession.execute(AddressBase.__table__.insert().values(new_addr))
-
-    @sql
-    def save_node(self, node_info):
-        self.DBSession.execute(NodeInfoBase.__table__.insert().values(node_info))
-
     def get_routing_policy_for_channel(self, start_node_id: bytes,
                                        short_channel_id: bytes) -> Optional[bytes]:
         if not start_node_id or not short_channel_id: return None
@@ -506,12 +498,18 @@ class ChannelDB(SqlDB):
     @sql
     @profiler
     def load_data(self):
-        for x in self.DBSession.query(AddressBase).all():
-            self._addresses[x.node_id].add((str(x.host), int(x.port), int(x.last_connected_date or 0)))
-        for x in self.DBSession.query(ChannelInfoBase).all():
-            self._channels[x.short_channel_id] = x.to_nametuple()
-        for x in self.DBSession.query(PolicyBase).filter_by().all():
-            p = x.to_nametuple()
+        c = self.conn.cursor()
+        c.execute("""SELECT * FROM address""")
+        for x in c:
+            node_id, host, port, timestamp = x
+            self._addresses[node_id].add((str(host), int(port), int(timestamp or 0)))
+        c.execute("""SELECT * FROM channel_info""")
+        for x in c:
+            ci = ChannelInfo(*x)
+            self._channels[ci.short_channel_id] = ci
+        c.execute("""SELECT * FROM policy""")
+        for x in c:
+            p = Policy(*x)
             self._policies[(p.start_node, p.short_channel_id)] = p
         for channel_info in self._channels.values():
             self._channels_for_node[channel_info.node1_id].add(channel_info.short_channel_id)

electrum/lnwatcher.py

@@ -13,12 +13,7 @@ from enum import IntEnum, auto
 from typing import NamedTuple, Dict
 import jsonrpclib
 
-from sqlalchemy import Column, ForeignKey, Integer, String, DateTime, Boolean
-from sqlalchemy.orm.query import Query
-from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy.sql import not_, or_
 from .sql_db import SqlDB, sql
-
 from .util import bh2u, bfh, log_exceptions, ignore_exceptions
 from . import wallet
 from .storage import WalletStorage
@@ -42,80 +37,105 @@ class TxMinedDepth(IntEnum):
     FREE = auto()
 
 
-Base = declarative_base()
-
-class SweepTx(Base):
-    __tablename__ = 'sweep_txs'
-    funding_outpoint = Column(String(34), primary_key=True)
-    index = Column(Integer(), primary_key=True)
-    prevout = Column(String(34))
-    tx = Column(String())
-
-class ChannelInfo(Base):
-    __tablename__ = 'channel_info'
-    outpoint = Column(String(34), primary_key=True)
-    address = Column(String(32))
+create_sweep_txs="""
+CREATE TABLE IF NOT EXISTS sweep_txs (
+funding_outpoint VARCHAR(34) NOT NULL,
+"index" INTEGER NOT NULL,
+prevout VARCHAR(34),
+tx VARCHAR,
+PRIMARY KEY(funding_outpoint, "index")
+)"""
 
+create_channel_info="""
+CREATE TABLE IF NOT EXISTS channel_info (
+outpoint VARCHAR(34) NOT NULL,
+address VARCHAR(32),
+PRIMARY KEY(outpoint)
+)"""
 
 
 class SweepStore(SqlDB):
 
     def __init__(self, path, network):
-        super().__init__(network, path, Base)
+        super().__init__(network, path)
+
+    def create_database(self):
+        c = self.conn.cursor()
+        c.execute(create_channel_info)
+        c.execute(create_sweep_txs)
+        self.conn.commit()
 
     @sql
     def get_sweep_tx(self, funding_outpoint, prevout):
-        return [Transaction(bh2u(r.tx)) for r in self.DBSession.query(SweepTx).filter(SweepTx.funding_outpoint==funding_outpoint, SweepTx.prevout==prevout).all()]
+        c = self.conn.cursor()
+        c.execute("SELECT tx FROM sweep_txs WHERE funding_outpoint=? AND prevout=?", (funding_outpoint, prevout))
+        return [Transaction(bh2u(r[0])) for r in c.fetchall()]
 
     @sql
     def get_tx_by_index(self, funding_outpoint, index):
-        r = self.DBSession.query(SweepTx).filter(SweepTx.funding_outpoint==funding_outpoint, SweepTx.index==index).one_or_none()
-        return str(r.prevout), bh2u(r.tx)
+        c = self.conn.cursor()
+        c.execute("""SELECT prevout, tx FROM sweep_txs WHERE funding_outpoint=? AND "index"=?""", (funding_outpoint, index))
+        r = c.fetchone()[0]
+        return str(r[0]), bh2u(r[1])
 
     @sql
     def list_sweep_tx(self):
-        return set(str(r.funding_outpoint) for r in self.DBSession.query(SweepTx).all())
+        c = self.conn.cursor()
+        c.execute("SELECT funding_outpoint FROM sweep_txs")
+        return set([r[0] for r in c.fetchall()])
 
     @sql
     def add_sweep_tx(self, funding_outpoint, prevout, tx):
-        n = self.DBSession.query(SweepTx).filter(funding_outpoint==funding_outpoint).count()
-        self.DBSession.add(SweepTx(funding_outpoint=funding_outpoint, index=n, prevout=prevout, tx=bfh(tx)))
-        self.DBSession.commit()
+        c = self.conn.cursor()
+        c.execute("SELECT count(*) FROM sweep_txs WHERE funding_outpoint=?", (funding_outpoint,))
+        n = int(c.fetchone()[0])
+        c.execute("""INSERT INTO sweep_txs (funding_outpoint, "index", prevout, tx) VALUES (?,?,?,?)""", (funding_outpoint, n, prevout, bfh(str(tx))))
+        self.conn.commit()
 
     @sql
     def get_num_tx(self, funding_outpoint):
-        return int(self.DBSession.query(SweepTx).filter(funding_outpoint==funding_outpoint).count())
+        c = self.conn.cursor()
+        c.execute("SELECT count(*) FROM sweep_txs WHERE funding_outpoint=?", (funding_outpoint,))
+        return int(c.fetchone()[0])
 
     @sql
     def remove_sweep_tx(self, funding_outpoint):
-        r = self.DBSession.query(SweepTx).filter(SweepTx.funding_outpoint==funding_outpoint).all()
-        for x in r:
-            self.DBSession.delete(x)
-        self.DBSession.commit()
+        c = self.conn.cursor()
+        c.execute("DELETE FROM sweep_txs WHERE funding_outpoint=?", (funding_outpoint,))
+        self.conn.commit()
 
     @sql
     def add_channel(self, outpoint, address):
-        self.DBSession.add(ChannelInfo(address=address, outpoint=outpoint))
-        self.DBSession.commit()
+        c = self.conn.cursor()
+        c.execute("INSERT INTO channel_info (address, outpoint) VALUES (?,?)", (address, outpoint))
+        self.conn.commit()
 
     @sql
     def remove_channel(self, outpoint):
-        v = self.DBSession.query(ChannelInfo).filter(ChannelInfo.outpoint==outpoint).one_or_none()
-        self.DBSession.delete(v)
-        self.DBSession.commit()
+        c = self.conn.cursor()
+        c.execute("DELETE FROM channel_info WHERE outpoint=?", (outpoint,))
+        self.conn.commit()
 
     @sql
     def has_channel(self, outpoint):
-        return bool(self.DBSession.query(ChannelInfo).filter(ChannelInfo.outpoint==outpoint).one_or_none())
+        c = self.conn.cursor()
+        c.execute("SELECT * FROM channel_info WHERE outpoint=?", (outpoint,))
+        r = c.fetchone()
+        return r is not None
 
     @sql
     def get_address(self, outpoint):
-        r = self.DBSession.query(ChannelInfo).filter(ChannelInfo.outpoint==outpoint).one_or_none()
-        return str(r.address) if r else None
+        c = self.conn.cursor()
+        c.execute("SELECT address FROM channel_info WHERE outpoint=?", (outpoint,))
+        r = c.fetchone()
+        return r[0] if r else None
 
     @sql
     def list_channel_info(self):
-        return [(str(r.address), str(r.outpoint)) for r in self.DBSession.query(ChannelInfo).all()]
+        c = self.conn.cursor()
+        c.execute("SELECT address, outpoint FROM channel_info")
+        return [(r[0], r[1]) for r in c.fetchall()]
+
 
 
 class LNWatcher(AddressSynchronizer):

electrum/sql_db.py

@@ -3,18 +3,11 @@ import concurrent
 import queue
 import threading
 import asyncio
-
-from sqlalchemy import create_engine
-from sqlalchemy.pool import StaticPool
-from sqlalchemy.orm import sessionmaker
+import sqlite3
 
 from .logging import Logger
 
 
-# https://stackoverflow.com/questions/26971050/sqlalchemy-sqlite-too-many-sql-variables
-SQLITE_LIMIT_VARIABLE_NUMBER = 999
-
-
 def sql(func):
     """wrapper for sql methods"""
     def wrapper(self, *args, **kwargs):
@@ -26,9 +19,8 @@ def sql(func):
 
 class SqlDB(Logger):
     
-    def __init__(self, network, path, base, commit_interval=None):
+    def __init__(self, network, path, commit_interval=None):
         Logger.__init__(self)
-        self.base = base
         self.network = network
         self.path = path
         self.commit_interval = commit_interval
@@ -37,13 +29,10 @@ class SqlDB(Logger):
         self.sql_thread.start()
 
     def run_sql(self):
-        #return
         self.logger.info("SQL thread started")
-        engine = create_engine('sqlite:///' + self.path, pool_reset_on_return=None, poolclass=StaticPool)#, echo=True)
-        DBSession = sessionmaker(bind=engine, autoflush=False)
-        if not os.path.exists(self.path):
-            self.base.metadata.create_all(engine)
-        self.DBSession = DBSession()
+        self.conn = sqlite3.connect(self.path)
+        self.logger.info("Creating database")
+        self.create_database()
         i = 0
         while self.network.asyncio_loop.is_running():
             try:
@@ -62,7 +51,7 @@ class SqlDB(Logger):
             if self.commit_interval:
                 i = (i + 1) % self.commit_interval
                 if i == 0:
-                    self.DBSession.commit()
+                    self.conn.commit()
         # write
-        self.DBSession.commit()
+        self.conn.commit()
         self.logger.info("SQL thread terminated")