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Oracle Subscription

1 min read
Pronunciation
[awr-uh-kl sub-skrip-shun]
Analogy
Like subscribing to a newspaper delivery service to receive daily news without ordering each issue separately.
Definition
A model where smart contracts or off‑chain consumers register interest in specific oracle data feeds and pay recurring fees to receive updates automatically.
Key Points Intro
Oracle subscriptions automate data delivery and payment through recurring agreements.
Key Points

Register: Consumer calls `subscribe(feedId, frequency)`.

Recurring billing: Escrow debited per update cycle.

Auto-update: Oracle pushes data to subscriber.

Cancellation: Consumer can unsubscribe to stop updates.

Example
A DeFi contract subscribes to a stablecoin price feed at 10‑minute intervals, paying 1 LINK per interval from its escrow.
Technical Deep Dive
Subscription contract stores `subscriptions[consumer][feedId] = { nextDue, interval, fee }`. On each `report()`, contract checks due subscriptions, transfers fees, and schedules nextDue.
Security Warning
Uncanceled subscriptions can drain funds; provide clear unsubscribe mechanisms.
Caveat
Automated updates increase on‑chain transactions; monitor gas usage.
Related Terms
Oracle Fee Model
Oracle Escrow
Oracle SLA Enforcement
Oracle Feed

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