Does the condition of a minimum withdrawal limit affect the validity of an ijara (leasing) contract in cryptocurrency mining?

The permissibility of stipulating a minimum wage depends on the nature of this condition:

- If the condition pertains to banking or financial procedures that prevent the withdrawal of amounts below a certain limit, such that the amount remains the worker's right in their account but is not currently withdrawable, this does not affect the validity of the ijara (leasing/hiring) contract.

- However, if the condition relates to the work itself, such that the worker is not entitled to their wage unless their balance reaches a certain amount, and is not entitled to anything if it does not, then this is impermissible. This is due to the presence of gharar (excessive uncertainty/risk) and qimar (gambling), as the worker's effort and labor would be exposed to loss.