Every role-based product starts simple and ends in a swamp of `if (user.role === ...)` checks. When we planned the LMS at Lunar IT Solution, the first decision was to treat roles as capabilities instead of identities.

A learner can enroll; a trainer can publish; an assistant can moderate; an admin can verify payments. Once permissions became a flat capability map, the UI could ask one question — can this user do X? — instead of branching on four role names in a dozen components.

The second decision was to model the payment verification workflow as a state machine. Pending, submitted, verified, rejected. Every transition emits an event, and the community and live-class modules subscribe to those events rather than reaching into the payment tables.