Supported Networks
Chainlink VRF allows you to integrate provably fair and verifiably random data in your smart contract.
For implementation details, read Introduction to Chainlink VRF v2 Direct funding method.
Wrapper parameters
These parameters are configured in the VRF v2 Wrapper contract. You can view these values by running getConfig
on the VRF v2 Wrapper or by viewing the VRF v2 Wrapper contract in a blockchain explorer.
uint32 stalenessSeconds
: How long the VRF v2 Wrapper waits until we consider the ETH/LINK price used for converting gas costs to LINK is stale and usefallbackWeiPerUnitLink
.uint32 wrapperGasOverhead
: The gas overhead of the VRF v2 Wrapper'sfulfillRandomWords
function.uint32 coordinatorGasOverhead
: The gas overhead of the coordinator'sfulfillRandomWords
function.uint8 maxNumWords
: Maximum number of words that can be requested in a single wrapped VRF request.
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 responduint32 maxGasLimit
: The maximum gas limit supported for afulfillRandomWords
callback. Note that you still need to substract thewrapperGasOverhead
for the accurate limit, as explained in Direct funding limits.
Fee parameters
Fee parameters are configured in the VRF v2 Wrapper and the VRF v2 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 v2 Wrapper:
- The
uint32 fulfillmentFlatFeeLinkPPM
parameter is a flat fee and defines the fees per request specified in millionths of LINK. - 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 v2 coordinators for direct funding are available on several networks. To see a list of coordinators for subscription funding, see the Subscription Configurations page.
:::caution[Understand Risks associated with Bridges] If you are using a cross-chain bridge to transfer your LINK tokens, read the Bridges and Associated Risks guide to understand what cross-chain bridges are and the risks associated with using them. :::
Ethereum mainnet
| Item | Value |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| LINK Token | 0x514910771AF9Ca656af840dff83E8264EcF986CA
|
| VRF Wrapper | 0x5A861794B927983406fCE1D062e00b9368d97Df6
|
| VRF Coordinator | 0x271682DEB8C4E0901D1a1550aD2e64D568E69909
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.25 LINK |
| Minimum Confirmations | 3 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
Sepolia testnet
| Item | Value |
| -------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| LINK Token | 0x779877A7B0D9E8603169DdbD7836e478b4624789
|
| VRF Wrapper | 0xab18414CD93297B0d12ac29E63Ca20f515b3DB46
|
| VRF Coordinator | 0x8103B0A8A00be2DDC778e6e7eaa21791Cd364625
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.25 LINK |
| Minimum Confirmations | 3 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
Goerli testnet
| Item | Value |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| LINK Token | 0x326C977E6efc84E512bB9C30f76E30c160eD06FB
|
| VRF Wrapper | 0x708701a1DfF4f478de54383E49a627eD4852C816
|
| VRF Coordinator | 0x2ca8e0c643bde4c2e08ab1fa0da3401adad7734d
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.25 LINK |
| Minimum Confirmations | 3 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
BNB Chain
| Item | Value |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| LINK Token | 0x404460C6A5EdE2D891e8297795264fDe62ADBB75
|
| VRF Wrapper | 0x721DFbc5Cfe53d32ab00A9bdFa605d3b8E1f3f42
|
| VRF Coordinator | 0xc587d9053cd1118f25F645F9E08BB98c9712A4EE
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.005 LINK |
| Minimum Confirmations | 3 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
BNB Chain testnet
| Item | Value |
| -------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| LINK Token | 0x84b9B910527Ad5C03A9Ca831909E21e236EA7b06
|
| VRF Wrapper | 0x699d428ee890d55D56d5FC6e26290f3247A762bd
|
| VRF Coordinator | 0x6A2AAd07396B36Fe02a22b33cf443582f682c82f
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.005 LINK |
| Minimum Confirmations | 3 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
Polygon (Matic) mainnet
| Item | Value |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| LINK Token | 0xb0897686c545045aFc77CF20eC7A532E3120E0F1
|
| VRF Wrapper | 0x4e42f0adEB69203ef7AaA4B7c414e5b1331c14dc
|
| VRF Coordinator | 0xAE975071Be8F8eE67addBC1A82488F1C24858067
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.0005 LINK |
| Minimum Confirmations | 3 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
Polygon (Matic) Mumbai testnet
| Item | Value |
| -------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| LINK Token | 0x326C977E6efc84E512bB9C30f76E30c160eD06FB
|
| VRF Wrapper | 0x99aFAf084eBA697E584501b8Ed2c0B37Dd136693
|
| VRF Coordinator | 0x7a1BaC17Ccc5b313516C5E16fb24f7659aA5ebed
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.0005 LINK |
| Minimum Confirmations | 3 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
Avalanche mainnet
| Item | Value |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| LINK Token | 0x5947BB275c521040051D82396192181b413227A3
|
| VRF Wrapper | 0x721DFbc5Cfe53d32ab00A9bdFa605d3b8E1f3f42
|
| VRF Coordinator | 0xd5D517aBE5cF79B7e95eC98dB0f0277788aFF634
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.005 LINK |
| Minimum Confirmations | 1 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
Avalanche Fuji testnet
| Item | Value |
| -------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| LINK Token | 0x0b9d5D9136855f6FEc3c0993feE6E9CE8a297846
|
| VRF Wrapper | 0x9345AC54dA4D0B5Cda8CB749d8ef37e5F02BBb21
|
| VRF Coordinator | 0x2eD832Ba664535e5886b75D64C46EB9a228C2610
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.005 LINK |
| Minimum Confirmations | 1 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
Fantom mainnet
| Item | Value |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| LINK Token | 0x6F43FF82CCA38001B6699a8AC47A2d0E66939407
|
| VRF Wrapper | 0xeDA5B00fB33B13c730D004Cf5D1aDa1ac191Ddc2
|
| VRF Coordinator | 0xd5D517aBE5cF79B7e95eC98dB0f0277788aFF634
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.0005 LINK |
| Minimum Confirmations | 1 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |
Fantom testnet
| Item | Value |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| LINK Token | 0xfaFedb041c0DD4fA2Dc0d87a6B0979Ee6FA7af5F
|
| VRF Wrapper | 0x38336BDaE79747a1d2c4e6C67BBF382244287ca6
|
| VRF Coordinator | 0xbd13f08b8352A3635218ab9418E340c60d6Eb418
|
| Wrapper Premium Percentage | 0 |
| Coordinator Flat Fee | 0.0005 LINK |
| Minimum Confirmations | 1 |
| Maximum Confirmations | 200 |
| Maximum Random Values | 10 |
| Wrapper Gas overhead | 40000 |
| Coordinator Gas Overhead | 90000 |