VRF v2 Rust SDK with Anchor

Crate to interact with orao-vrf smart contract on Solana network.

Provides interface to request for a verifiable randomness (Ed25519 Signature) on the Solana network.

API-Docs

Usage example - Rust Native

Please look at the off-chain example.

Cross-Program-Invocation (CPI) example

Browse through the cpi for more info.

lib.rs:

ORAO VRF

Crate to interact with orao-vrf smart contract on Solana network.

Provides an interface to request verifiable randomness (Ed25519 Signature) on the Solana network.

Documentation

Please look into the following functions and structures:

• RequestBuilder – convenient builder for randomness requests
• get_network_state – helper to fetch the VRF configuration
• get_randomness – helper to fetch the randomness request state
• randomness_account_address – helper to derive randomness request state address
• network_state_account_address – helper to derive VRF on-chain configuration address

Cross Program Invocation

For CPI please look into the cpi example and account requirements for the Request instruction.

Note: requires cpi feature to be enabled and sdk feature to be disabled.

// assuming ctx to be a context of an instruction that performs CPI
let vrf_program = ctx.accounts.vrf.to_account_info();
let request_accounts = orao_solana_vrf::cpi::accounts::Request {
    payer: ctx.accounts.player.to_account_info(),
    network_state: ctx.accounts.config.to_account_info(),
    treasury: ctx.accounts.treasury.to_account_info(),
    request: ctx.accounts.request.to_account_info(),
    system_program: ctx.accounts.system_program.to_account_info(),
};
let cpi_ctx = CpiContext::new(vrf_program, request_accounts);
orao_solana_vrf::cpi::request(cpi_ctx, seed)?;