Web3 Casino Game Engine
Provably fair Web3 casino game engines on Solana and EVM - coinflip, dice, roulette, crash, lottery and jackpot games with on-chain logic and verifiable randomness (Chainlink VRF).
I'm Roswelly, a Rust smart contract and backend developer specializing in Web3 casino game engines. I design and ship provably fair on-chain games on Solana (Rust/Anchor) and EVM (Solidity) - coinflip, dice, roulette, crash, lottery and jackpot - with verifiable randomness, NFT rewards, and treasury / fee logic handled end-to-end.
Provably fair on-chain game logic
All game state - bets, outcomes, payouts and jackpots - lives on-chain. Random outcomes use Chainlink VRF on EVM and verifiable RNG on Solana, so players can audit every round. No trusted operator, no hidden seeds.
Contracts are written with strict access control, reentrancy protection, and gas / compute-unit optimization. Every game path has unit and integration tests before mainnet.
Player lifecycle & economy
Deposits, withdrawals, staking, VIP-tier NFT rewards, and referral / affiliate flows - all wired into the same on-chain state machine the games use. Treasury and fee logic is modular so operators can tune rake, house edge, and reward splits.
Non-native token profits can be converted via on-chain price oracles into native token reward shares, making reward accounting consistent regardless of which token players bet with.
Full-stack delivery
Smart contracts + a Next.js / React frontend + a Node.js backend (PostgreSQL / Prisma or MongoDB) for user accounts, session history and admin tooling. Real-time payouts over WebSockets. Deployments are containerized and observable from day one.
Related case studies
Solana Lottery Game
Built smart contract for lottery game and backend and frontend integration. implemented NFT mint and rewards for users who only followed the official twitter by using rapid api. Made ticket purchase system which user buys 6 of ticket number, discord bot service.
Web3 Casino Games
Built smart contracts and dapps for web3 casino games. Implemented casino logic(bets, payouts, jackpots) on-chain and ensuring fairness with provably fair algorithms. Handled deposits, withdrawals, and staking. Integrated NFTs for in-game assets, VIP access, or player rewards.
Polygon Casino Games
Built base smart contract for Coiflip, Dice, Roulette, Crash and random outcomes are generated usingi Chainlink VRF. Integrated price oracles to convert non-native token profits to native token shares for reward.
Frequently asked questions
What does 'provably fair' mean for a Web3 casino?
Outcomes are derived from a random source that the operator cannot manipulate - typically Chainlink VRF on EVM or verifiable RNG on Solana - and all game state transitions happen on-chain. Players can independently replay any round and verify the outcome.
Which games have you shipped?
Coinflip, dice, roulette, crash, lottery, and jackpot games across Solana and EVM (Polygon, BNB). I can add new games to an existing engine or build a new engine from scratch.
Can you handle deposits, withdrawals, NFT rewards, and treasury logic?
Yes. These are part of the same engine I ship, not afterthoughts: deposits/withdrawals with replay protection, VIP NFTs, referral flows, treasury splits, and an admin dashboard for operators.
Other specializations
Hire a Rust smart contract & web3 casino game engine specialist
Planning a web3 casino game engine project? Let's talk architecture, Rust smart contracts, and the low-latency backend to run it in production.
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