Solana VRF Program

This repository contains the source code to a Solana Random Oracle program, which works together with the pseudorandom number generator server, available at Vrf-Server

Whenever creating a program to interact with the vrf_program, make sure that you have at least two transactions. One is to Commit and ask for a pseudorandom number, other is to use the number generated. An integration example is available in the cpi_example contract.

The latest version of the vrf_program is deployed in the devnet:

vrf-program: 7dsYrsf7cjdMjZBBVv2DzK17Y2Lh8ie16fe48yG1Sn1t

Integrating with your own program

If you wish to use the pseudorandom numbers in your own Solana program, you can either replace the cpi_example program methods and structures with your code or create a new program with the anchor cli command:

anchor new <program-name>

Dependencies

In order to deploy your own version of the vrf_program, you will need to install:

• Anchor
• Rust
• Solana-Cli

Deployment

The deployment costs around 4 sol on devnet

• Make sure you have a keypair configured, and at least 4 sol on devnet beforehand
• Update path to your keypair in Anchor.toml that begins with wallet =
• Run anchor build to build the programs
• We need to update the program IDs:
  • Run solana-keygen pubkey ./target/deploy/vrf_program-keypair.json - update the program ID in the following locations:
    • ./Anchor.toml
    • ./programs/vrf_program/src/lib.rs
• Rerun the program IDs update step to every program being deployed, replacing vrf_program with the actual program name
• Run anchor build to build one more time with the updated program ID.
• Run anchor deploy --provider.cluster devnet to deploy to devnet

License

MIT