Atomically increment the redemption counter; returns the new count. When limit is given, increment ONLY while the count is below it and return null when the cap is already reached — a single conditional write, so two concurrent redemptions of the last slot cannot both succeed. (A store that ignores limit still works: redeem() rejects a count above the cap, but the counter is then left one over.)

Parameters

code

string

limit?

number

Returns

Promise<number | null>

save()

> save(coupon): Promise<void>

Defined in: subscriptions/src/coupon.ts:116

Parameters

coupon

CouponRecord

Returns

Promise<void>