repay should not throw when repaying a borrow of the same block

[jkrivine]

Reading at the audits it seems AAVE added this check in order to force users to use flashloan instead of the borrow-repay sequence in the block. I think this is wrong for two reasons:

• a flashloan is a service that has an added value to the user because you can borrow the liquidity of other accounts on the pool (which might justify fees). However a sequence borrow-repay is done on the user's collateral. So preventing this should be considered as abusive.
• this restriction might become a blocker for cash managers that rely on AAVE pools because their account on aave integrates multiple user's account on their side: user A of the protocol P tries to repay its debt on AAVE via P while user B of the protocol tries to borrow, also via P. This is interpreted as an illegal sequence by the pool's logic that identifies user A and B as P.

[miguelmtzinf]

Agree with the second point. This requirement has caused some issues for integrators where users positions are aggregated into one single account.

[jkrivine]

good to know. I am curious why you would disagree with the first point though :)

[miguelmtzinf]

good to know. I am curious why you would disagree with the first point though :)

I assume was initially designed to prevent free loans of 1 block duration, since there is already a function for that. I dont have any personal preference about this