def __init__(self, count, freq, cachedir='', pairs=[]):
self.count = max(count, 1)
self.d = {}
self.lastmutex = Semaphore(1)
self.first = None
self.last = None
for key, value in pairs:
self[key] = value
# Set the frequency to something like 1/100th of
# the expected dictionary final size to achieve
# best performance.
self.diskcache = DictCache(freq, cachedir)
def __init__(self,
router_config: str='uniswap',
name: Optional[str]=None,
filter_address: Sequence[str]=None):
script_dir = os.path.dirname(os.path.realpath(__file__))
self.name = type(self).__name__ if name is None else name
with open(os.path.join(script_dir, 'config.json')) as f:
self._config = json5.load(f)
self._uniswap: Dict[str, UniswapV2Client] = {}
self.router_config = router_config
self._web3: Optional[Web3] = None
self._web3_write: Optional[Web3] = None
self._abi_cache: Dict[str, str] = {}
self.wait_async = 0.1
self.token_cache = DictCache("token-" + self.name)
self.pair_cache = DictCache("pair-" + self.name)
self.reserves_cache = DictCache("reserves-" + self.name)
self.deadline = 1800.0
self.default_gas_price = \
self.web3().toWei(15, "gwei")
self._weth_address: Optional[str] = None
self.execute_trade = False
self.filter_address = [ self.uniswap().router_address.lower() ] \
if filter_address is None else [x.lower() for x in filter_address]
class LRU2(object):
"""
Implementation of a length-limited O(1) LRU queue
with disk caching.
"""
# This LRU drops off items to a disk dictionary cache
# when older items are dropped.
def __init__(self, count, freq, cachedir='', pairs=[]):
self.count = max(count, 1)
self.d = {}
self.lastmutex = Semaphore(1)
self.first = None
self.last = None
for key, value in pairs:
self[key] = value
# Set the frequency to something like 1/100th of
# the expected dictionary final size to achieve
# best performance.
self.diskcache = DictCache(freq, cachedir)
def __copy__(self):
lrucopy = LRU(self.count)
lrucopy.first = copy.copy(self.first)
lrucopy.last = copy.copy(self.last)
lrucopy.d = self.d.copy()
for key, value in self.iteritems():
lrucopy[key] = value
return lrucopy
def __contains__(self, obj):
return obj in self.d
def __getitem__(self, obj):
try:
a = self.d[obj].me
self[a[0]] = a[1]
return a[1]
except (KeyError, AttributeError):
return self.diskcache[obj]
def __setitem__(self, obj, val):
if obj in self.d:
del self[obj]
nobj = Node(self.last, (obj, val))
if self.first is None:
self.first = nobj
self.lastmutex.acquire()
try:
if self.last:
self.last.next = nobj
self.last = nobj
except:
pass
self.lastmutex.release()
self.d[obj] = nobj
if len(self.d) > self.count:
self.lastmutex.acquire()
try:
if self.first == self.last:
self.first = None
self.last = None
self.lastmutex.release()
return
except:
pass
self.lastmutex.release()
a = self.first
if a:
if a.next:
a.next.prev = None
self.first = a.next
a.next = None
try:
key, val = a.me[0], self.d[a.me[0]]
del self.d[a.me[0]]
del a
self.diskcache[key] = val.me[1]
except (KeyError, AttributeError):
pass
def __delitem__(self, obj):
nobj = self.d[obj]
if nobj.prev:
nobj.prev.next = nobj.next
else:
self.first = nobj.next
if nobj.next:
nobj.next.prev = nobj.prev
else:
self.last = nobj.prev
del self.d[obj]
def __iter__(self):
cur = self.first
while cur != None:
cur2 = cur.next
yield cur.me[1]
cur = cur2
def iteritems(self):
cur = self.first
while cur != None:
cur2 = cur.next
yield cur.me
cur = cur2
def iterkeys(self):
return iter(self.d)
def itervalues(self):
for i, j in self.iteritems():
yield j
def keys(self):
return self.d.keys()
def clear(self):
self.d.clear()
self.diskcache.clear()
def __len__(self):
return len(self.d)
def get_stats(self):
""" Return statistics as a dictionary """
return self.diskcache.get_stats()
def test(self, N):
# Test to see if the diskcache works. Pass
# the total number of items added to this
# function...
flag = True
for x in range(N):
if self[x] == None:
flag = False
break
return flag
