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Solidity Challenge #369 🕵️‍♂️

Can the 'spin' function in this RouletteSpin contract be exploited to always win? 🎲

RouletteSpin Contract

Issues

  1. Fixed Bet: Requires exactly 10 ether to play.
  2. Timestamp Manipulation: Miners can manipulate block timestamps.
  3. Single Spin: Only one spin per block.

Example

  1. Send 10 ether.
  2. If block timestamp % 15 == 0, win the contract balance.

Solutions

  1. Flexible Betting: Allow different bet amounts.
  2. Secure Randomness: Use a secure randomness source.
  3. Multiple Spins: Allow multiple spins per block.