rollover_hints_list can be left emptyjoin method is used to add collateral to a pool in exchange for pool share ERC20 tokens. exit method creates a redemption request and adds it to Redemption Queue. The queue is processed automatically when users interact with the protocol and free collateral becomes available. Once that happens, the queued request is converted to Released Liquidity - an amount of collateral available to withdraw at any time. This can be done using withdrawReleasedLiquidity method.