Lesson 9 : Using Direct Funding instead of Subscription for Random Number

[jksgfsdfd]

Has anyone tried to implement the direct funding method locally instead of using the subscription method?

[alymurtazamemon]

@ronmaa Direct funding?

[jksgfsdfd]

yeah.... https://docs.chain.link/docs/vrf/v2/direct-funding/
Instead of creating a subscription , we interact with a Wrapper contract which in turn interacts with the VRFCoordinator.

[alymurtazamemon]

@PatrickAlphaC

[DorianDaSilva]

That seems like an interesting idea! Does it work?

[jksgfsdfd]

When I tried I got the following error
Error: VM Exception while processing transaction: invalid opcode at <UnrecognizedContract>.<unknown> (0x5fbdb2315678afecb367f032d93f642f64180aa3) at TestingVRFDirect.requestRandomness (@chainlink/contracts/src/v0.8/VRFV2WrapperConsumerBase.sol:60)