eth-cache/eth_cache/store/file.py

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Python
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2022-03-01 16:03:47 +01:00
# standard imports
import os
import json
import logging
# external imports
from hexathon import strip_0x
from chainlib.eth.tx import (
Tx,
pack,
)
from leveldir.numeric import NumDir
from leveldir.hex import HexDir
logg = logging.getLogger(__name__)
default_base_dir = '/var/lib'
def chain_dir_for(chain_spec, base_dir=default_base_dir):
chain_dir = os.path.join(base_dir, str(chain_spec).replace(':', '/'))
return os.path.join(chain_dir, 'eth_cache')
class FileStore:
def put_tx(self, tx, include_data=False):
raw = pack(tx.src(), self.chain_spec)
tx_hash_dirnormal = strip_0x(tx.hash).upper()
tx_hash_bytes = bytes.fromhex(tx_hash_dirnormal)
self.tx_raw_dir.add(tx_hash_bytes, raw)
if self.address_rules != None:
for a in tx.outputs + tx.inputs:
if self.address_rules.apply_rules_addresses(a, a, tx.hash):
a_hex = strip_0x(a).upper()
a = bytes.fromhex(a_hex)
self.address_dir.add_dir(tx_hash_dirnormal, a, b'')
dirpath = self.address_dir.to_filepath(a_hex)
fp = os.path.join(dirpath, '.start')
num = tx.block.number
num_compare = 0
try:
f = open(fp, 'rb')
r = f.read(8)
f.close()
num_compare = int.from_bytes(r, 'big')
except FileNotFoundError:
pass
if num_compare == 0 or num < num_compare:
logg.debug('recoding new start block {} for {}'.format(num, a))
num_bytes = num.to_bytes(8, 'big')
f = open(fp, 'wb')
f.write(num_bytes)
f.close()
if include_data:
src = json.dumps(tx.src()).encode('utf-8')
self.tx_dir.add(bytes.fromhex(strip_0x(tx.hash)), src)
rcpt_src = tx.rcpt_src()
logg.debug('rcpt {}'.format(rcpt_src))
if rcpt_src != None:
rcpt_src = json.dumps(rcpt_src).encode('utf-8')
self.rcpt_dir.add(bytes.fromhex(strip_0x(tx.hash)), rcpt_src)
def put_block(self, block, include_data=False):
hash_bytes = bytes.fromhex(strip_0x(block.hash))
self.block_num_dir.add(block.number, hash_bytes)
num_bytes = block.number.to_bytes(8, 'big')
self.block_hash_dir.add(hash_bytes, num_bytes)
if include_data:
src = json.dumps(block.src()).encode('utf-8')
self.block_src_dir.add(hash_bytes, src)
def get_block_number(self, block_number):
fp = self.block_num_dir.to_filepath(block_number)
f = open(fp, 'rb')
r = f.read()
f.close()
return self.get_block(r.hex())
def get_block(self, block_hash):
fp = self.block_src_dir.to_filepath(block_hash)
f = open(fp, 'rb')
r = f.read()
f.close()
return r
def get_tx(self, tx_hash):
fp = self.tx_dir.to_filepath(tx_hash)
f = open(fp, 'rb')
r = f.read()
f.close()
return r
def get_rcpt(self, tx_hash):
fp = self.rcpt_dir.to_filepath(tx_hash)
f = open(fp, 'rb')
r = f.read()
f.close()
return r
def get_address_tx(self, address):
fp = self.address_dir.to_filepath(address)
tx_hashes = []
for tx_hash in os.listdir(fp):
if tx_hash[0] == '.':
continue
tx_hashes.append(tx_hash)
return tx_hashes
def __init__(self, chain_spec, cache_root=default_base_dir, address_rules=None):
# self.cache_root = os.path.join(
# cache_root,
# 'eth_cache',
# chain_spec.engine(),
# chain_spec.fork(),
# str(chain_spec.chain_id()),
# )
#self.cache_root = os.path.realpath(self.cache_root)
#self.chain_dir = chain_dir_for(chain_spec, self.cache_root)
self.chain_dir = chain_dir_for(chain_spec, cache_root)
self.cache_dir = self.chain_dir
self.block_src_path = os.path.join(self.cache_dir, 'block', 'src')
self.block_src_dir = HexDir(self.block_src_path, 32, levels=2)
self.block_num_path = os.path.join(self.cache_dir, 'block', 'num')
self.block_num_dir = NumDir(self.block_num_path, [100000, 1000])
self.block_hash_path = os.path.join(self.cache_dir, 'block', 'hash')
self.block_hash_dir = HexDir(self.block_hash_path, 32, levels=2)
self.tx_path = os.path.join(self.cache_dir, 'tx', 'src')
self.tx_raw_path = os.path.join(self.cache_dir, 'tx', 'raw')
self.tx_dir = HexDir(self.tx_path, 32, levels=2)
self.tx_raw_dir = HexDir(self.tx_raw_path, 32, levels=2)
self.rcpt_path = os.path.join(self.cache_dir, 'rcpt', 'src')
self.rcpt_raw_path = os.path.join(self.cache_dir, 'rcpt', 'raw')
self.rcpt_dir = HexDir(self.rcpt_path, 32, levels=2)
self.rcpt_raw_dir = HexDir(self.rcpt_raw_path, 32, levels=2)
self.address_path = os.path.join(self.cache_dir, 'address')
self.address_dir = HexDir(self.address_path, 20, levels=2)
self.chain_spec = chain_spec
self.address_rules = address_rules
def __str__(self):
return 'FileStore: root {}'.format(self.cache_root)