We should have the following stuff:

• solana-cli 1.16.0 (src:e0fcdbb0; feat:2891131721, client:SolanaLabs)
• rustc 1.70.0 (90c541806 2023-05-31)
• anchor-cli 0.28.0

We should install:

• Solana's Install Tool
  sh -c "$(curl -sSfL https://release.solana.com/v1.16.0/install)"

• anchor install
  cargo install --git https://github.com/coral-xyz/anchor --tag v0.28.0 anchor-cli --locked

• rustc 1.70.0 (90c541806 2023-05-31)
  curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

git clone https://github.com/CryptoElitesClub/solana-vrf && cd solana-vrf/rust/examples/cpi/
anchor build or cargo-build-sbf
anchor keys list - that will show us an address, that we need to change in the code for

We should change the result address in some files, such as:

programs/russian-roulette/src/lib.rs:declare_id!("2tqa84LLK7E3hUWbQ9AoAUJMjmHEb26je4xjzEeRuBF8");
Anchor.toml:russian_roulette = "2tqa84LLK7E3hUWbQ9AoAUJMjmHEb26je4xjzEeRuBF8"

when is done, we deploy by anchor deploy

Deploying cluster: https://api.devnet.solana.com
Upgrade authority: /root/.config/solana/id.json
Deploying program "russian_roulette"...
Program path: /root/lottery/lottery_contract/rust/examples/cpi/target/deploy/russian_roulette.so...
Program Id: 2tqa84LLK7E3hUWbQ9AoAUJMjmHEb26je4xjzEeRuBF8

I spent near to 2-4 SOL to be able to deploy the contract.