Getting Started

Before diving into the technical details, let’s understand how dVRF works and how to subscribe to consume random numbers.

Think of it like a prepaid phone plan, but for random numbers. You deposit funds upfront, and Supra uses them to pay gas fees for your VRF callbacks.

Predictable costs: Set gas limits upfront, no surprises
Simplified contracts: Your VRF consumer contracts don’t need to handle payments
Bulk management: One subscription can serve multiple contracts
Reliability: Reserved minimum balance ensures your requests don’t fail due to insufficient funds

Understanding the complete dVRF process flow will help you integrate more effectively:

dVRF Integration Flow

Why use subscriptions?

You create a subscription with your wallet address as the manager
Deposit funds into your subscription account
Register (whitelist) your smart contracts under this subscription
When your contracts request random numbers, Supra automatically pays the callback gas fees from your subscription balance
No need to handle gas payments in your contract code - it’s all automated!