While a listing is locked in a challenge, tokens cannot be withdrawn if the withdrawal would leave the listing with < minDeposit unstakedDeposit

[skmgoldin]

tcr/contracts/Registry.sol

Line 134 in db40cd3

require(listing.unstakedDeposit - _amount >= parameterizer.get("minDeposit"));

The intent of this line is to prevent people from making withdrawals that would leave them subject to touch-and-removes. It does that.

A side effect is that while a challenge is active, tokens cannot be withdrawn which would leave the unstaked deposit less tnan minDeposit, which is actually unnecessary. If the listing loses the challenge they will go away, and if they win they will necessarily be left with at least minDeposit tokens unlocked since they get their deposit amount unlocked plus their winnings from the challenge loser. Since multiple challenges cannot be in flight against a listing at the same time, it is okay if during a challenge a user withdraws their entire unstaked deposit.

[Kmoneal]

Let's put a note about this in the Prospect Park Owner's Manual.