DepositPaymaster

A token-based paymaster that accepts token deposits The deposit is only a safeguard: the user pays with his token balance. only if the user didn't approve() the paymaster, or if the token balance is not enough, the deposit will be used. thus the required deposit is to cover just one method call. The deposit is locked for the current block: the user must issue unlockTokenDeposit() to be allowed to withdraw (but can't use the deposit for this or further operations) paymasterAndData holds the paymaster address followed by the token address to use.This paymaster will be rejected by the standard rules of EIP4337, as it uses an external oracle. (the standard rules ban accessing data of an external contract) It can only be used if it is "whitelisted" by the bundler. (technically, it can be used by an "oracle" which returns a static value, without accessing any storage)