You can find the current deployed instances and ABIs of IdleTokens and governance contracts at the following addresses
Idle protocol V4:
Idle protocol V4:
*No rebalance happens in Kovan
All Idle contracts are verified on Etherscan and for your convenience, you can also find the source code of the codebase here for the IdleTokens contracts and here for the governance.
If you are looking for previous versions of Idle protocol, you can check Old Contracts section.