from web3 import Web3
from web3._utils.events import get_event_data
w3 = Web3(Web3.HTTPProvider("https://cloudflare-eth.com"))
ck_token_addr = "0x06012c8cf97BEaD5deAe237070F9587f8E7A266d" # CryptoKitties Contract
acc_address = "0xb1690C08E213a35Ed9bAb7B318DE14420FB57d8C" # CryptoKitties Sales Auction
# This is a simplified Contract Application Binary Interface (ABI) of an ERC-721 NFT Contract.
# It will expose only the methods: balanceOf(address), name(), ownerOf(tokenId), symbol(), totalSupply()
simplified_abi = [
{
'inputs': [{'internalType': 'address', 'name': 'owner', 'type': 'address'}],
'name': 'balanceOf',
'outputs': [{'internalType': 'uint256', 'name': '', 'type': 'uint256'}],
'payable': False, 'stateMutability': 'view', 'type': 'function', 'constant': True
},
{
'inputs': [],
'name': 'name',
'outputs': [{'internalType': 'string', 'name': '', 'type': 'string'}],
'stateMutability': 'view', 'type': 'function', 'constant': True
},
{
'inputs': [{'internalType': 'uint256', 'name': 'tokenId', 'type': 'uint256'}],
'name': 'ownerOf',
'outputs': [{'internalType': 'address', 'name': '', 'type': 'address'}],
'payable': False, 'stateMutability': 'view', 'type': 'function', 'constant': True
},
{
'inputs': [],
'name': 'symbol',
'outputs': [{'internalType': 'string', 'name': '', 'type': 'string'}],
'stateMutability': 'view', 'type': 'function', 'constant': True
},
{
'inputs': [],
'name': 'totalSupply',
'outputs': [{'internalType': 'uint256', 'name': '', 'type': 'uint256'}],
'stateMutability': 'view', 'type': 'function', 'constant': True
},
]
ck_extra_abi = [
{
'inputs': [],
'name': 'pregnantKitties',
'outputs': [{'name': '', 'type': 'uint256'}],
'payable': False, 'stateMutability': 'view', 'type': 'function', 'constant': True
},
{
'inputs': [{'name': '_kittyId', 'type': 'uint256'}],
'name': 'isPregnant',
'outputs': [{'name': '', 'type': 'bool'}],
'payable': False, 'stateMutability': 'view', 'type': 'function', 'constant': True
}
]
ck_contract = w3.eth.contract(address=w3.to_checksum_address(ck_token_addr), abi=simplified_abi+ck_extra_abi)
name = ck_contract.functions.name().call()
symbol = ck_contract.functions.symbol().call()
kitties_auctions = ck_contract.functions.balanceOf(acc_address).call()
print(f"{name} [{symbol}] NFTs in Auctions: {kitties_auctions}")
pregnant_kitties = ck_contract.functions.pregnantKitties().call()
print(f"{name} [{symbol}] NFTs Pregnants: {pregnant_kitties}")
# Using the Transfer Event ABI to get info about transferred Kitties.
tx_event_abi = {
'anonymous': False,
'inputs': [
{'indexed': False, 'name': 'from', 'type': 'address'},
{'indexed': False, 'name': 'to', 'type': 'address'},
{'indexed': False, 'name': 'tokenId', 'type': 'uint256'}],
'name': 'Transfer',
'type': 'event'
}
# We need the event's signature to filter the logs
event_signature = w3.keccak(text="Transfer(address,address,uint256)").hex()
logs = w3.eth.get_logs({
"fromBlock": w3.eth.block_number - 120,
"address": w3.to_checksum_address(ck_token_addr),
"topics": [event_signature]
})
# Notes:
# - Increase the number of blocks up from 120 if no Transfer event is returned.
# - If you didn't find any Transfer event you can also try to get a tokenId at:
# https://etherscan.io/address/0x06012c8cf97BEaD5deAe237070F9587f8E7A266d#events
# Click to expand the event's logs and copy its "tokenId" argument
recent_tx = [get_event_data(w3.codec, tx_event_abi, log)["args"] for log in logs]
if recent_tx:
kitty_id = recent_tx[0]['tokenId'] # Paste the "tokenId" here from the link above
is_pregnant = ck_contract.functions.isPregnant(kitty_id).call()
print(f"{name} [{symbol}] NFTs {kitty_id} is pregnant: {is_pregnant}")
