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web3 cronos PART 1 read from SINGLE/USDC LP
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| import json | |
| import asyncio | |
| from web3 import Web3 | |
| ''' | |
| SINGLE/USDC LP: https://vvs.finance/info/farm/0x0fbab8a90cac61b481530aad3a64fe17b322c25d | |
| This will lead to CRONOS Explorer (Where you'd find ABI and contract source code): https://cronos.org/explorer/address/0x0fBAB8A90CAC61b481530AAd3a64fE17B322C25d/contracts | |
| Cronos integration doc (Where you'd find the node_url): https://cronos.org/docs/resources/chain-integration.html | |
| ''' | |
| from web3 import Web3 | |
| import json | |
| cronos_mainnet_rpc = "https://evm.cronos.org" | |
| w3 = Web3(Web3.HTTPProvider(cronos_mainnet_rpc)) | |
| pool_address = Web3.toChecksumAddress("0x0fBAB8A90CAC61b481530AAd3a64fE17B322C25d") | |
| pool_abi = '[{"type":"constructor","stateMutability":"nonpayable","payable":false,"inputs":[]},{"type":"event","name":"Approval","inputs":[{"type":"address","name":"owner","internalType":"address","indexed":true},{"type":"address","name":"spender","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Burn","inputs":[{"type":"address","name":"sender","internalType":"address","indexed":true},{"type":"uint256","name":"amount0","internalType":"uint256","indexed":false},{"type":"uint256","name":"amount1","internalType":"uint256","indexed":false},{"type":"address","name":"to","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Mint","inputs":[{"type":"address","name":"sender","internalType":"address","indexed":true},{"type":"uint256","name":"amount0","internalType":"uint256","indexed":false},{"type":"uint256","name":"amount1","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Swap","inputs":[{"type":"address","name":"sender","internalType":"address","indexed":true},{"type":"uint256","name":"amount0In","internalType":"uint256","indexed":false},{"type":"uint256","name":"amount1In","internalType":"uint256","indexed":false},{"type":"uint256","name":"amount0Out","internalType":"uint256","indexed":false},{"type":"uint256","name":"amount1Out","internalType":"uint256","indexed":false},{"type":"address","name":"to","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Sync","inputs":[{"type":"uint112","name":"reserve0","internalType":"uint112","indexed":false},{"type":"uint112","name":"reserve1","internalType":"uint112","indexed":false}],"anonymous":false},{"type":"event","name":"Transfer","inputs":[{"type":"address","name":"from","internalType":"address","indexed":true},{"type":"address","name":"to","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"DOMAIN_SEPARATOR","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"MINIMUM_LIQUIDITY","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bytes32","name":"","internalType":"bytes32"}],"name":"PERMIT_TYPEHASH","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"allowance","inputs":[{"type":"address","name":"","internalType":"address"},{"type":"address","name":"","internalType":"address"}],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"approve","inputs":[{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"balanceOf","inputs":[{"type":"address","name":"","internalType":"address"}],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"uint256","name":"amount0","internalType":"uint256"},{"type":"uint256","name":"amount1","internalType":"uint256"}],"name":"burn","inputs":[{"type":"address","name":"to","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"decimals","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"factory","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint112","name":"_reserve0","internalType":"uint112"},{"type":"uint112","name":"_reserve1","internalType":"uint112"},{"type":"uint32","name":"_blockTimestampLast","internalType":"uint32"}],"name":"getReserves","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"initialize","inputs":[{"type":"address","name":"_token0","internalType":"address"},{"type":"address","name":"_token1","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"kLast","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"uint256","name":"liquidity","internalType":"uint256"}],"name":"mint","inputs":[{"type":"address","name":"to","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"string","name":"","internalType":"string"}],"name":"name","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"nonces","inputs":[{"type":"address","name":"","internalType":"address"}],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"permit","inputs":[{"type":"address","name":"owner","internalType":"address"},{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"uint256","name":"deadline","internalType":"uint256"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"price0CumulativeLast","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"price1CumulativeLast","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"skim","inputs":[{"type":"address","name":"to","internalType":"address"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"swap","inputs":[{"type":"uint256","name":"amount0Out","internalType":"uint256"},{"type":"uint256","name":"amount1Out","internalType":"uint256"},{"type":"address","name":"to","internalType":"address"},{"type":"bytes","name":"data","internalType":"bytes"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"string","name":"","internalType":"string"}],"name":"symbol","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"sync","inputs":[],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"token0","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"","internalType":"address"}],"name":"token1","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalSupply","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transfer","inputs":[{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transferFrom","inputs":[{"type":"address","name":"from","internalType":"address"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"}],"constant":false}]' | |
| pool_contract = w3.eth.contract(address=pool_address, abi=pool_abi) | |
| router_address = Web3.toChecksumAddress("0x145863Eb42Cf62847A6Ca784e6416C1682b1b2Ae") | |
| router_abi = json.loads('[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_factory","internalType":"address"},{"type":"address","name":"_WETH","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"WETH","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"amountA","internalType":"uint256"},{"type":"uint256","name":"amountB","internalType":"uint256"},{"type":"uint256","name":"liquidity","internalType":"uint256"}],"name":"addLiquidity","inputs":[{"type":"address","name":"tokenA","internalType":"address"},{"type":"address","name":"tokenB","internalType":"address"},{"type":"uint256","name":"amountADesired","internalType":"uint256"},{"type":"uint256","name":"amountBDesired","internalType":"uint256"},{"type":"uint256","name":"amountAMin","internalType":"uint256"},{"type":"uint256","name":"amountBMin","internalType":"uint256"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[{"type":"uint256","name":"amountToken","internalType":"uint256"},{"type":"uint256","name":"amountETH","internalType":"uint256"},{"type":"uint256","name":"liquidity","internalType":"uint256"}],"name":"addLiquidityETH","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"amountTokenDesired","internalType":"uint256"},{"type":"uint256","name":"amountTokenMin","internalType":"uint256"},{"type":"uint256","name":"amountETHMin","internalType":"uint256"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"factory","inputs":[]},{"type":"function","stateMutability":"pure","outputs":[{"type":"uint256","name":"amountIn","internalType":"uint256"}],"name":"getAmountIn","inputs":[{"type":"uint256","name":"amountOut","internalType":"uint256"},{"type":"uint256","name":"reserveIn","internalType":"uint256"},{"type":"uint256","name":"reserveOut","internalType":"uint256"}]},{"type":"function","stateMutability":"pure","outputs":[{"type":"uint256","name":"amountOut","internalType":"uint256"}],"name":"getAmountOut","inputs":[{"type":"uint256","name":"amountIn","internalType":"uint256"},{"type":"uint256","name":"reserveIn","internalType":"uint256"},{"type":"uint256","name":"reserveOut","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256[]","name":"amounts","internalType":"uint256[]"}],"name":"getAmountsIn","inputs":[{"type":"uint256","name":"amountOut","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256[]","name":"amounts","internalType":"uint256[]"}],"name":"getAmountsOut","inputs":[{"type":"uint256","name":"amountIn","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"}]},{"type":"function","stateMutability":"pure","outputs":[{"type":"uint256","name":"amountB","internalType":"uint256"}],"name":"quote","inputs":[{"type":"uint256","name":"amountA","internalType":"uint256"},{"type":"uint256","name":"reserveA","internalType":"uint256"},{"type":"uint256","name":"reserveB","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"amountA","internalType":"uint256"},{"type":"uint256","name":"amountB","internalType":"uint256"}],"name":"removeLiquidity","inputs":[{"type":"address","name":"tokenA","internalType":"address"},{"type":"address","name":"tokenB","internalType":"address"},{"type":"uint256","name":"liquidity","internalType":"uint256"},{"type":"uint256","name":"amountAMin","internalType":"uint256"},{"type":"uint256","name":"amountBMin","internalType":"uint256"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"amountToken","internalType":"uint256"},{"type":"uint256","name":"amountETH","internalType":"uint256"}],"name":"removeLiquidityETH","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"liquidity","internalType":"uint256"},{"type":"uint256","name":"amountTokenMin","internalType":"uint256"},{"type":"uint256","name":"amountETHMin","internalType":"uint256"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"amountETH","internalType":"uint256"}],"name":"removeLiquidityETHSupportingFeeOnTransferTokens","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"liquidity","internalType":"uint256"},{"type":"uint256","name":"amountTokenMin","internalType":"uint256"},{"type":"uint256","name":"amountETHMin","internalType":"uint256"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"amountToken","internalType":"uint256"},{"type":"uint256","name":"amountETH","internalType":"uint256"}],"name":"removeLiquidityETHWithPermit","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"liquidity","internalType":"uint256"},{"type":"uint256","name":"amountTokenMin","internalType":"uint256"},{"type":"uint256","name":"amountETHMin","internalType":"uint256"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"},{"type":"bool","name":"approveMax","internalType":"bool"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"amountETH","internalType":"uint256"}],"name":"removeLiquidityETHWithPermitSupportingFeeOnTransferTokens","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"liquidity","internalType":"uint256"},{"type":"uint256","name":"amountTokenMin","internalType":"uint256"},{"type":"uint256","name":"amountETHMin","internalType":"uint256"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"},{"type":"bool","name":"approveMax","internalType":"bool"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":"amountA","internalType":"uint256"},{"type":"uint256","name":"amountB","internalType":"uint256"}],"name":"removeLiquidityWithPermit","inputs":[{"type":"address","name":"tokenA","internalType":"address"},{"type":"address","name":"tokenB","internalType":"address"},{"type":"uint256","name":"liquidity","internalType":"uint256"},{"type":"uint256","name":"amountAMin","internalType":"uint256"},{"type":"uint256","name":"amountBMin","internalType":"uint256"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"},{"type":"bool","name":"approveMax","internalType":"bool"},{"type":"uint8","name":"v","internalType":"uint8"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"}]},{"type":"function","stateMutability":"payable","outputs":[{"type":"uint256[]","name":"amounts","internalType":"uint256[]"}],"name":"swapETHForExactTokens","inputs":[{"type":"uint256","name":"amountOut","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[{"type":"uint256[]","name":"amounts","internalType":"uint256[]"}],"name":"swapExactETHForTokens","inputs":[{"type":"uint256","name":"amountOutMin","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"swapExactETHForTokensSupportingFeeOnTransferTokens","inputs":[{"type":"uint256","name":"amountOutMin","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256[]","name":"amounts","internalType":"uint256[]"}],"name":"swapExactTokensForETH","inputs":[{"type":"uint256","name":"amountIn","internalType":"uint256"},{"type":"uint256","name":"amountOutMin","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"swapExactTokensForETHSupportingFeeOnTransferTokens","inputs":[{"type":"uint256","name":"amountIn","internalType":"uint256"},{"type":"uint256","name":"amountOutMin","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256[]","name":"amounts","internalType":"uint256[]"}],"name":"swapExactTokensForTokens","inputs":[{"type":"uint256","name":"amountIn","internalType":"uint256"},{"type":"uint256","name":"amountOutMin","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"swapExactTokensForTokensSupportingFeeOnTransferTokens","inputs":[{"type":"uint256","name":"amountIn","internalType":"uint256"},{"type":"uint256","name":"amountOutMin","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256[]","name":"amounts","internalType":"uint256[]"}],"name":"swapTokensForExactETH","inputs":[{"type":"uint256","name":"amountOut","internalType":"uint256"},{"type":"uint256","name":"amountInMax","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256[]","name":"amounts","internalType":"uint256[]"}],"name":"swapTokensForExactTokens","inputs":[{"type":"uint256","name":"amountOut","internalType":"uint256"},{"type":"uint256","name":"amountInMax","internalType":"uint256"},{"type":"address[]","name":"path","internalType":"address[]"},{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"deadline","internalType":"uint256"}]},{"type":"receive","stateMutability":"payable"}]') # noqa | |
| # Dirty Hack: Every entry in ABI must have "name" attribute! Otherwise web3.py will fail in later calls. | |
| i : int = 0 | |
| for entry in router_abi: | |
| if 'name' not in entry: | |
| entry['name'] = f"dummy_name_{i}" | |
| i = i+1 | |
| router_contract = w3.eth.contract(address=router_address, abi=router_abi) | |
| ''' | |
| You can take any ERC20 token contract ABI. For example https://etherscan.io/address/0xc3761eb917cd790b30dad99f6cc5b4ff93c4f9ea#code | |
| Uses are ... | |
| a. "decimals" | |
| b. transfer - Make sure for "transfer", payable set to true!!! (This is for withdrawal/transfers!) | |
| ''' | |
| EIP20_ABI = '[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":true,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Approval","type":"event"}]' | |
| usdc_address = Web3.toChecksumAddress("0xc21223249CA28397B4B6541dfFaEcC539BfF0c59") | |
| single_address = Web3.toChecksumAddress("0x0804702a4E749d39A35FDe73d1DF0B1f1D6b8347") | |
| usdc_contract = w3.eth.contract(address=usdc_address, abi=EIP20_ABI) | |
| single_contract = w3.eth.contract(address=single_address, abi=EIP20_ABI) | |
| token0 = pool_contract.functions.token0().call() # SINGLE | |
| token1 = pool_contract.functions.token1().call() # USDC | |
| print(f"token0: {token0} (SINGLE), token1: {token1} (USDC)") | |
| usdc_decimals = usdc_contract.functions.decimals().call() | |
| single_decimals = single_contract.functions.decimals().call() | |
| ''' | |
| To get the token0 and token1 reserve (ie number of tokens in the pool)and the timestamp of the last block during which an interaction occured for the pair. | |
| You always divide by POW(10, decimals) to get the right balance. Reference: https://web3py.readthedocs.io/en/stable/examples.html | |
| >>> contract.functions.name().call() | |
| 'TestToken' | |
| >>> decimals = contract.functions.decimals().call() | |
| >>> decimals | |
| 18 | |
| >>> DECIMALS = 10 ** decimals | |
| >>> contract.functions.totalSupply().call() // DECIMALS | |
| 1000000 | |
| >>> alice = '0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf' | |
| >>> bob = '0x2B5AD5c4795c026514f8317c7a215E218DcCD6cF' | |
| >>> raw_balance = contract.functions.balanceOf(alice).call() | |
| >>> raw_balance | |
| 1000000000000000000000000 | |
| >>> raw_balance // DECIMALS <-- You always divide by POW(10, decimals) or POW(10, 18) | |
| 1000000 | |
| >>> contract.functions.balanceOf(bob).call() | |
| 0 | |
| ''' | |
| reserve0, reserve1, blockTimestampLast = pool_contract.functions.getReserves().call() | |
| reserve0 = reserve0 / 10**single_decimals | |
| reserve1 = reserve1 / 10**usdc_decimals | |
| print(f"Number of tokens from getReserves() ... token0: {reserve0} (SINGLE), token1: {reserve1} (USDC)") | |
| # getReserves and getBalance should return the same balance | |
| balance0 = single_contract.functions.balanceOf(pool_address).call() | |
| balance1 = usdc_contract.functions.balanceOf(pool_address).call() | |
| balance0 = balance0 / 10**single_decimals | |
| balance1 = balance1 / 10**usdc_decimals | |
| print(f"Number of tokens from balanceOf() ... token0: {balance0}, token1: {balance1}") | |
| single_price = reserve1 / reserve0 | |
| print(f"single_price: {single_price}") | |
| def handle_event(event): | |
| event_json = json.loads(Web3.toJSON(event)) | |
| print(f"{event_json}") | |
| ''' | |
| amount1 = quote ccy, amount0 = base ccy. | |
| event_json format: | |
| '{ | |
| "args": { | |
| "sender": "0x145863Eb42Cf62847A6Ca784e6416C1682b1b2Ae", | |
| "to": "0x2379f3ba3ADdB68031A107f39D4B97Fb795d23e3", | |
| "amount0In": 0, | |
| "amount1In": 30316060, | |
| "amount0Out": 247495192320818656738, | |
| "amount1Out": 0 | |
| }, | |
| "event": "Swap", | |
| "logIndex": 18, | |
| "transactionIndex": 3, | |
| "transactionHash": "0x4922c0af45c79f0d5dcf4922517acc5c77752d3b0d26a7eb205675db8cecd33b", | |
| "address": "0x0fBAB8A90CAC61b481530AAd3a64fE17B322C25d", | |
| "blockHash": "0xa60fe752b5bffc56803cccaccb64ea7158303ec1c60f091068a2828b80e58631", | |
| "blockNumber": 1734150 | |
| }' | |
| ''' | |
| amount0In = float(event_json['args']['amount0In']) | |
| amount1In = float(event_json['args']['amount1In']) | |
| amount0Out = float(event_json['args']['amount0Out']) | |
| amount1Out = float(event_json['args']['amount1Out']) | |
| last_trade : float = amount1Out/amount0In if amount0In!=0 else amount1In/amount0Out | |
| trade_consideration : float = amount0In if amount0In!=0 else amount0Out | |
| ''' | |
| References: | |
| Official: https://web3py.readthedocs.io/en/stable/filters.html#asynchronous-filters | |
| cryptomarketpool: https://cryptomarketpool.com/how-to-listen-for-ethereum-events-using-web3-in-python/ | |
| SO: https://stackoverflow.com/questions/71335600/web3-event-filter-get-new-entries-valueerror-code-32000-message-filte | |
| ''' | |
| async def log_loop(poll_interval): | |
| while True: | |
| try: | |
| event_filter = pool_contract.events.Swap.createFilter(fromBlock='latest') | |
| # event_filter = web3.eth.filter('latest') | |
| # event_filter = web3.eth.filter('pending') | |
| for event in event_filter.get_new_entries(): | |
| handle_event(event) | |
| await asyncio.sleep(poll_interval) | |
| except Exception as error: | |
| print(f"Not again! {error}") | |
| loop = asyncio.get_event_loop() | |
| try: | |
| loop.run_until_complete( | |
| asyncio.gather( | |
| log_loop(2))) | |
| finally: | |
| loop.close() |
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Example event_json:
'{"args": {"sender": "0x145863Eb42Cf62847A6Ca784e6416C1682b1b2Ae", "to": "0x2379f3ba3ADdB68031A107f39D4B97Fb795d23e3", "amount0In": 0, "amount1In": 30316060, "amount0Out": 247495192320818656738, "amount1Out": 0}, "event": "Swap", "logIndex": 18, "transactionIndex": 3, "transactionHash": "0x4922c0af45c79f0d5dcf4922517acc5c77752d3b0d26a7eb205675db8cecd33b", "address": "0x0fBAB8A90CAC61b481530AAd3a64fE17B322C25d", "blockHash": "0xa60fe752b5bffc56803cccaccb64ea7158303ec1c60f091068a2828b80e58631", "blockNumber": 1734150}'This is this here: https://cronos.org/explorer/tx/0x4922c0af45c79f0d5dcf4922517acc5c77752d3b0d26a7eb205675db8cecd33b/token-transfers