Updated · by T3raTech · Free: 25 payments per 30 days, $0; Growth (recommended): 500 payments per 30 days for $49/month; Scale: 2,500 payments per 30 days for $499/month
The flow
A paid checkout emails a licence key. The device calls POST /v2/licensing/activate with the key and a deviceId and receives a signed entitlement. The app stores it and checks the signature locally.
Why Ed25519
Verification needs only the public key, which is safe to embed in the app. Forging an entitlement requires the private key, which stays with the issuer.
What this buys you
An app that works offline, no per-launch licence call to fail, and a trust root you can pin. When a customer loses a key, POST /v2/licensing/recover mails a fresh one.
What it does not do
An offline check cannot know a licence was revoked after the entitlement was issued; design entitlement lifetimes to match how quickly you need revocation to bite.