Implementing Cardano Smart Contracts for Ethical Blockchain-Based Sports Betting Platform — Need Help on Final Integration

Developers Smart Contracts
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Hi everyone,

We’re close to completing a blockchain-based sports betting platform — about 90% done — and have chosen to implement our smart contract layer on Cardano due to its cost-efficiency, scalability, and the benefits of Plutus for secure contract logic.

Here’s a quick overview of what we’re building:

  • :bullseye: Platform: Sports betting game built on blockchain
  • :money_bag: Rewards: Payouts and rewards in crypto
  • :white_check_mark: Ethical System: Players have daily limits and betting caps to promote responsible gaming
  • :money_with_wings: Revenue Model: Platform earns via commission from every bet

We’re facing a technical hurdle related to dynamic user caps and daily betting limits on Cardano. Our goal is to enforce logic where:

  1. A user can place only a fixed number of bets per day
  2. There is a max cap on total value they can wager per 24 hours
  3. This limit resets every day at a set time, but remains traceable and tamper-proof on-chain

Since Cardano’s smart contracts (Plutus) are stateful but limited in tracking time-based user activity without off-chain input, we are unsure:

  • Should we handle daily time resets entirely off-chain and only enforce current bet limits on-chain?
  • Or is there a better way to structure this logic within the contract while ensuring decentralization and trust?

Any advice or experience with similar time-restricted smart contracts on Cardano would be appreciated.

Thanks in advance!
— Team @ Fourchain

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I suggest first looking at similar projects to compare approaches.

  • For example, Bodega is an open-source prediction market platform with smart contracts that share similar properties to what you’re describing.
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