forked from LBRYCommunity/lbry-sdk
242 lines
9.7 KiB
Python
242 lines
9.7 KiB
Python
import os.path
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import asyncio
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import sqlite3
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from typing import List, Optional
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from concurrent.futures import ThreadPoolExecutor
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from lbry.schema.url import normalize_name
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from .bcd_data_stream import BCDataStream
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FILES = [
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'claims',
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'block_index',
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]
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def make_short_url(r):
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try:
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return f'{normalize_name(r["name"].decode())}#{r["shortestID"] or r["claimID"][::-1].hex()[0]}'
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except UnicodeDecodeError:
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# print(f'failed making short url due to name parse error for claim_id: {r["claimID"][::-1].hex()}')
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return "INVALID NAME"
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class FindShortestID:
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__slots__ = 'short_id', 'new_id'
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def __init__(self):
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self.short_id = ''
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self.new_id = None
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def step(self, other_id, new_id):
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other_id = other_id[::-1].hex()
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if self.new_id is None:
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self.new_id = new_id[::-1].hex()
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for i in range(len(self.new_id)):
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if other_id[i] != self.new_id[i]:
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if i > len(self.short_id)-1:
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self.short_id = self.new_id[:i+1]
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break
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def finalize(self):
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return self.short_id
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class BlockchainDB:
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def __init__(self, directory: str):
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self.directory = directory
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self.connection: Optional[sqlite3.Connection] = None
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self.executor: Optional[ThreadPoolExecutor] = None
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async def run_in_executor(self, *args):
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return await asyncio.get_event_loop().run_in_executor(self.executor, *args)
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def sync_open(self):
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self.connection = sqlite3.connect(
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os.path.join(self.directory, FILES[0]+'.sqlite'),
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timeout=60.0 * 5
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)
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for file in FILES[1:]:
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self.connection.execute(
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f"ATTACH DATABASE '{os.path.join(self.directory, file+'.sqlite')}' AS {file}"
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)
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self.connection.create_aggregate("find_shortest_id", 2, FindShortestID)
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self.connection.execute("CREATE INDEX IF NOT EXISTS claim_originalheight ON claim (originalheight);")
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self.connection.execute("CREATE INDEX IF NOT EXISTS claim_updateheight ON claim (updateheight);")
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self.connection.execute("create index IF NOT EXISTS support_blockheight on support (blockheight);")
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self.connection.row_factory = sqlite3.Row
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async def open(self):
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assert self.executor is None, "Database is already open."
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self.executor = ThreadPoolExecutor(max_workers=1)
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return await self.run_in_executor(self.sync_open)
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def sync_close(self):
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self.connection.close()
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self.connection = None
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async def close(self):
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if self.executor is not None:
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if self.connection is not None:
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await self.run_in_executor(self.sync_close)
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self.executor.shutdown()
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self.executor = None
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async def commit(self):
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await self.run_in_executor(self.connection.commit)
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def sync_execute(self, sql: str, *args):
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return self.connection.execute(sql, *args)
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async def execute(self, sql: str, *args):
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return await self.run_in_executor(self.sync_execute, sql, *args)
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def sync_execute_fetchall(self, sql: str, *args) -> List[dict]:
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return self.connection.execute(sql, *args).fetchall()
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async def execute_fetchall(self, sql: str, *args) -> List[dict]:
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return await self.run_in_executor(self.sync_execute_fetchall, sql, *args)
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def sync_get_best_height(self) -> int:
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sql = "SELECT MAX(height) FROM block_info"
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return self.connection.execute(sql).fetchone()[0]
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async def get_best_height(self) -> int:
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return await self.run_in_executor(self.sync_get_best_height)
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def sync_get_block_files(self, file_number: int = None, start_height: int = None) -> List[dict]:
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sql = """
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SELECT
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file as file_number,
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COUNT(hash) as blocks,
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SUM(txcount) as txs,
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MAX(height) as best_height,
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MIN(height) as start_height
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FROM block_info
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WHERE status&1 AND status&4
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"""
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args = ()
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if file_number is not None and start_height is not None:
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sql += "AND file = ? AND height >= ?"
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args = (file_number, start_height)
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return [dict(r) for r in self.sync_execute_fetchall(sql + " GROUP BY file ORDER BY file ASC;", args)]
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async def get_block_files(self, file_number: int = None, start_height: int = None) -> List[dict]:
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return await self.run_in_executor(
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self.sync_get_block_files, file_number, start_height
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)
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def sync_get_blocks_in_file(self, block_file: int, start_height=0) -> List[dict]:
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return [dict(r) for r in self.sync_execute_fetchall(
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"""
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SELECT datapos as data_offset, height, hash as block_hash, txCount as txs
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FROM block_info
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WHERE file = ? AND height >= ? AND status&1 AND status&4
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ORDER BY datapos ASC;
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""", (block_file, start_height)
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)]
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async def get_blocks_in_file(self, block_file: int, start_height=0) -> List[dict]:
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return await self.run_in_executor(self.sync_get_blocks_in_file, block_file, start_height)
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def sync_get_claim_support_txo_hashes(self, at_height: int) -> set:
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return {
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r['txID'] + BCDataStream.uint32.pack(r['txN'])
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for r in self.connection.execute(
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"""
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SELECT txID, txN FROM claim WHERE updateHeight = ?
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UNION
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SELECT txID, txN FROM support WHERE blockHeight = ?
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""", (at_height, at_height)
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).fetchall()
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}
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def sync_get_takeover_count(self, start_height: int, end_height: int) -> int:
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sql = """
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SELECT COUNT(*) FROM claim WHERE name IN (
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SELECT name FROM takeover
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WHERE name IS NOT NULL AND height BETWEEN ? AND ?
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)
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""", (start_height, end_height)
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return self.connection.execute(*sql).fetchone()[0]
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async def get_takeover_count(self, start_height: int, end_height: int) -> int:
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return await self.run_in_executor(self.sync_get_takeover_count, start_height, end_height)
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def sync_get_takeovers(self, start_height: int, end_height: int) -> List[dict]:
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sql = """
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SELECT name, claimID, MAX(height) AS height FROM takeover
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WHERE name IS NOT NULL AND height BETWEEN ? AND ?
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GROUP BY name
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""", (start_height, end_height)
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return [{
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'normalized': normalize_name(r['name'].decode()),
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'claim_hash': r['claimID'],
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'height': r['height']
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} for r in self.sync_execute_fetchall(*sql)]
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async def get_takeovers(self, start_height: int, end_height: int) -> List[dict]:
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return await self.run_in_executor(self.sync_get_takeovers, start_height, end_height)
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def sync_get_claim_metadata_count(self, start_height: int, end_height: int) -> int:
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sql = "SELECT COUNT(*) FROM claim WHERE originalHeight BETWEEN ? AND ?"
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return self.connection.execute(sql, (start_height, end_height)).fetchone()[0]
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async def get_claim_metadata_count(self, start_height: int, end_height: int) -> int:
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return await self.run_in_executor(self.sync_get_claim_metadata_count, start_height, end_height)
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def sync_get_claim_metadata(self, claim_hashes) -> List[dict]:
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sql = f"""
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SELECT
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name, claimID, activationHeight, expirationHeight, originalHeight,
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(SELECT
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CASE WHEN takeover.claimID = claim.claimID THEN takeover.height END
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FROM takeover WHERE takeover.name = claim.name
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ORDER BY height DESC LIMIT 1
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) AS takeoverHeight,
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(SELECT find_shortest_id(c.claimid, claim.claimid) FROM claim AS c
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WHERE
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c.nodename = claim.nodename AND
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c.originalheight <= claim.originalheight AND
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c.claimid != claim.claimid
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) AS shortestID
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FROM claim
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WHERE claimID IN ({','.join(['?' for _ in claim_hashes])})
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ORDER BY claimID
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""", claim_hashes
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return [{
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"name": r["name"],
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"claim_hash": r["claimID"],
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"activation_height": r["activationHeight"],
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"expiration_height": r["expirationHeight"],
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"takeover_height": r["takeoverHeight"],
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"creation_height": r["originalHeight"],
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"short_url": make_short_url(r),
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} for r in self.sync_execute_fetchall(*sql)]
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async def get_claim_metadata(self, start_height: int, end_height: int) -> List[dict]:
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return await self.run_in_executor(self.sync_get_claim_metadata, start_height, end_height)
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def sync_get_support_metadata_count(self, start_height: int, end_height: int) -> int:
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sql = "SELECT COUNT(*) FROM support WHERE blockHeight BETWEEN ? AND ?"
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return self.connection.execute(sql, (start_height, end_height)).fetchone()[0]
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async def get_support_metadata_count(self, start_height: int, end_height: int) -> int:
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return await self.run_in_executor(self.sync_get_support_metadata_count, start_height, end_height)
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def sync_get_support_metadata(self, start_height: int, end_height: int) -> List[dict]:
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sql = """
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SELECT name, txid, txn, activationHeight, expirationHeight
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FROM support WHERE blockHeight BETWEEN ? AND ?
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""", (start_height, end_height)
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return [{
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"name": r['name'],
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"txo_hash_pk": r['txID'] + BCDataStream.uint32.pack(r['txN']),
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"activation_height": r['activationHeight'],
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"expiration_height": r['expirationHeight'],
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} for r in self.sync_execute_fetchall(*sql)]
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async def get_support_metadata(self, start_height: int, end_height: int) -> List[dict]:
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return await self.run_in_executor(self.sync_get_support_metadata, start_height, end_height)
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