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from web3 import Web3, HTTPProvider
from web3.middleware import geth_poa_middleware
from web3.auto import w3
from eth_account.messages import encode_defunct
from web3.exceptions import TransactionNotFound
from requests.exceptions import ConnectionError
from web3.datastructures import AttributeDict
class ContractProvider:
def __init__(self, name,
provider_urls,
contract_address,
abi,
commision_wallet=None,
cfnet=None,
chain_name=None,
event_keys_map = None,
native_token_index = None,
pair_token_index = None,
nft_contract = False,
nft_token = None, network_id = None):
self.name = name
self.net = cfnet
self.commision_wallet = commision_wallet
self.contract_address = contract_address
self.__last_attempt_block = "latest"
self.abi = abi
self.urls = provider_urls
self.chain_name = chain_name
self.event_keys_map = event_keys_map
self.native_token_index = native_token_index
self.pair_token_index = pair_token_index
self.__reserves = None
self.__supply = None
self.__tokens = None
self.__token_symbols = None
self.is_nft = nft_contract
self.nft_token = nft_token
self.network_id = network_id
pavel.sidorenko
committed
@property
def w3(self):
for url in self.urls:
try:
web3 = Web3(HTTPProvider(url))
if web3.isConnected():
web3.middleware_onion.inject(geth_poa_middleware, layer=0)
return web3
except Exception as e:
#logIt.notice(f"Connection failed for URL {url}: {e}")
continue
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raise ConnectionError("No valid links provided - failed to connect")
@property
def contract(self):
contract = self.w3.eth.contract(address=self.contract_address, abi=self.abi)
return contract
@property
def functions(self):
return self.contract.functions
@property
def reserves(self):
if self.is_nft:
return 0
return self.functions.getReserves().call()
@property
def supply(self):
if self.is_nft:
return 0
return self.functions.totalSupply().call()
@property
def native_token_ticker(self):
#just nft - native ticker form ERC20 abi
if self.is_nft:
self.__token_symbols = [self.contract.functions.symbol().call(), "Unknown"]
return self.__token_symbols[self.native_token_index]
if not self.__tokens:
self.__tokens = [self.functions.token0().call(), self.functions.token1().call()]
if not self.__token_symbols:
t0provider = ContractProvider(name = "Token0-lp", provider_urls=self.urls, contract_address=self.__tokens[0], abi = self.abi)
t1provider = ContractProvider(name = "Token1-lp", provider_urls=self.urls, contract_address=self.__tokens[1], abi = self.abi)
t1 = t0provider.functions.symbol().call()
t2 = t1provider.functions.symbol().call()
self.__token_symbols = [t1, t2]
return self.__token_symbols[self.native_token_index]
@property
def pair_token_ticker(self):
if self.is_nft:
return "NFT"
if not self.__tokens:
self.__tokens = [self.functions.token0().call(), self.functions.token1().call()]
if not self.__token_symbols:
t0provider = ContractProvider(name = "Token0-lp", provider_urls=self.urls, contract_address=self.__tokens[0], abi = self.abi)
t1provider = ContractProvider(name = "Token1-lp", provider_urls=self.urls, contract_address=self.__tokens[1], abi = self.abi)
t1 = t0provider.functions.symbol().call()
t2 = t1provider.functions.symbol().call()
self.__token_symbols = [t1, t2]
return self.__token_symbols[self.pair_token_index]
def all_events(self, event_name, **kwargs):
return self.contract.events[event_name].createFilter(**kwargs).get_all_entries()
def all_events_from_last_try(self, event_name):
block = self.w3.eth.blockNumber
events = self.contract.events[event_name].createFilter(fromBlock=self.__last_attempt_block).get_all_entries()
#logIt.notice("{} events from {} to {} block: {}".format(self.name, self.__last_attempt_block, block, len(events)))
self.__last_attempt_block = block
return events
def event_from_tx_logs(self, tx_hash, event_name):
receipt = self.w3.eth.get_transaction_receipt(tx_hash)
return self.contract.events[event_name]().processReceipt(receipt)
def get_transaction(self, txhash):
tx = self.w3.eth.get_transaction(txhash)
contract_data = self.contract.decode_function_input(tx.input)[1]
return tx, contract_data
def normalized_event_data(self, ev):
if not self.event_keys_map:
raise RuntimeError("Can't normilize event data, no mapping")
result = {}
for key in self.event_keys_map.keys():
result[key] = ev["args"][self.event_keys_map[key]]
if not "_block" in ev["args"]:
result["_block"] = self.w3.eth.blockNumber
else:
result["_block"] = ev["args"]["_block"]
return result