Supported networks#

Wrapper parameters#

These parameters are configured in the VRF Wrapper contract. You can view these values by running getConfig and call other view function on the VRF Wrapper or by viewing the VRF Wrapper contract in a blockchain explorer.

• uint32 wrapperGasOverhead: The gas overhead of the VRF Wrapper’s fulfillRandomWords function.
• uint32 coordinatorGasOverhead: The gas overhead of the coordinator’s fulfillRandomWords function.
• uint8 maxNumWords: Maximum number of words that can be requested in a single wrapped VRF request.
• uint32 wrapperGasOverhead: The gas overhead of the VRF Wrapper’s fulfillRandomWords function.
• uint32 s_minGasPrice: The min gas price for consumer request randomwords transaction.

Coordinator parameters#

Some parameters are important to know and are configured in the coordinator contract. You can view these values by running getConfig on the coordinator or by viewing the coordinator contract in a blockchain explorer.

• uint16 minimumRequestConfirmations: The minimum number of confirmation blocks on VRF requests before oracles respond
• uint32 maxGasLimit: The maximum gas limit supported for a fulfillRandomWords callback. Note that you still need to substract the wrapperGasOverhead for the accurate limit, as explained in Direct funding limits.

Fee parameters#

Fee parameters are configured in the VRF Wrapper and the VRF Coordinator contracts and specify the premium you pay per request in addition to the gas cost for the transaction. You can view them by running getConfig on the VRF Wrapper:

• The uint8 wrapperPremiumPercentage parameter defines the premium ratio in percentage. For example, a value of 0 indicates no premium. A value of 15 indicates a 15% premium.

The details for calculating the total transaction cost can be found here.

Configurations#

VRF coordinators for direct funding are available on several networks.

OKT Mainnet#