kclowes
commented
3 years ago Thanks for such a detailed issue @vintrocode! Looking over this briefly I'm not sure why you'd need to call the implementation function? It looks like you should be able to do all of the external facing tasks - deposit, withdraw, borrow, etc. from the lending pool address that you have: 0xE0fBa4Fc209b4948668006B2bE61711b7f465bAe. Am I misunderstanding?
The error you're getting back is a Solidity revert which I suspect is being triggered by the isAdmin check, like you said.
Huge
vintrocode
pip freezeoutputI'm trying to access the Aave lending pool contract via web3py. I'm not sure if my issue is because I'm missing something with web3py or there's something with the Aave contracts, but I'll explain what I tried.
First, I connected to the Kovan testnet with no problem
Aave has a lending pool addresses provider contract that you can use to get the actual lending pool's address, so I created that contract object first.
I called the
getLendingPool()function which returns (what I found out to be) a proxy address:0xE0fBa4Fc209b4948668006B2bE61711b7f465bAeIf you find that address on Kovan Etherscan, you'll see it's called
InitializableImmutableAdminUpgradeabilityProxy. A few discord discussions later, I found out that's a proxy contract and learned about EIP-1967, which says you can retrieve the address of the logic contract from this proxy or "beacon" contract using animplementation()method. I was able to verify this method exists with the.all_functions()command, so I tried calling it and this is what I got:My research on that led me to the source code of the solidity contract, which seems to have an admin lock on almost all of the functions:
I asked the Aave devs what to do but they seemed perplexed that I was even dealing with the proxy contract in the first place, as it seemed no one had familiarity with web3py and this hasn't occurred before in JS. They said my logic should have just worked, but the ultimate solution was to forget the proxy and hard code the address of the lending pool which works, but is ultimately a bandaid solution. Any help or direction is greatly appreciated, thanks in advance.