Hey Megan, imagine a blockchain‑based mystery where every clue is hidden inside a smart contract, and players have to decode it before the next block is mined—sounds like a perfect mix of suspense and code.

Sounds like a killer concept—let’s map out the story arc, then layer in a few off‑chain oracle twists so the players have to pull data from the real world to break a code. Every block could reveal a new chapter, and the final clue might even unlock a DAO vote that decides the mystery’s ending. We’ll keep the code tight, the logic elegant, and the suspense ticking with the blocktime. Ready to dive in?

Let’s start with a three‑act structure: Act 1 sets up the mystery and drops the first clue into a contract, Act 2 ramps up with the oracle twists that force players to fetch live data, and Act 3 delivers the DAO vote that splits the ending. We’ll lock each clue to a block, so every new block feels like a heartbeat. I’ll draft the contract skeleton and outline the oracle feeds—ready when you are.

Here’s a stripped‑down outline you can drop into a Remix or Hardhat project. All the smart‑contract pieces are in one file so you can see the flow, and the oracle parts are commented where you’d plug in a Chainlink or VRF feed. Keep the code tight, but feel free to expand each section with more checks or storage as the puzzle gets deeper. Solidity 0.8.x skeleton ``` pragma solidity ^0.8.20; // -------------------- // Core mystery logic // -------------------- contract MysteryGame { // --- State variables --- address public owner; uint256 public blockTarget; // block at which the next clue is revealed mapping(uint256 => string) public clues; // block number => clue text mapping(address => bool) public participants; uint256 public votingDeadline; mapping(uint256 => uint256) public voteCount; // choice => votes uint256 public totalVotes; // --- Events --- event ClueReleased(uint256 blockNumber, string clue); event OracleDataReceived(bytes32 data); event VoteCast(address voter, uint256 choice); event OutcomeDetermined(uint256 winningChoice); // --- Constructor --- constructor(uint256 _blockTarget, uint256 _votingDeadline) { owner = msg.sender; blockTarget = _blockTarget; votingDeadline = _votingDeadline; } // --- Modifier --- modifier onlyOwner() { require(msg.sender == owner, "Not owner"); _; } modifier onlyDuringVoting() { require(block.timestamp < votingDeadline, "Voting closed"); _; } // --- Participation --- function joinGame() external { require(!participants[msg.sender], "Already joined"); participants[msg.sender] = true; } // --- Clue release --- function releaseClue() external onlyOwner { require(block.number >= blockTarget, "Too early"); // In a real game, this string would be encrypted or generated on-chain string memory clue = string(abi.encodePacked("Clue for block ", uint2str(block.number))); clues[block.number] = clue; emit ClueReleased(block.number, clue); } // --- Oracle integration (placeholder) --- // For example, Chainlink Aggregator or VRF random number function requestOracleData() external onlyOwner { // Normally you’d call a Chainlink request here // requestRandomness(...); // or requestDataFromAggregator(...) } function receiveOracleData(bytes32 _data) external { // Only the oracle or a trusted callback can call this // store or process the data emit OracleDataReceived(_data); // Example: reveal a new clue that depends on external data string memory oracleClue = string(abi.encodePacked("Oracle clue: ", uint2str(uint256(_data)))); clues[block.number] = oracleClue; emit ClueReleased(block.number, oracleClue); } // --- Voting --- function castVote(uint256 _choice) external onlyDuringVoting { require(participants[msg.sender], "Not a participant"); require(voteCount[_choice] == 0, "Already voted for this choice"); // simple anti‑re‑vote voteCount[_choice] += 1; totalVotes += 1; emit VoteCast(msg.sender, _choice); } // --- Outcome determination --- function determineOutcome() external onlyOwner { require(block.timestamp >= votingDeadline, "Voting still open"); uint256 winningChoice; uint256 maxVotes = 0; // Find the choice with the most votes for (uint256 i = 0; i < 5; i++) { // assume 5 possible endings if (voteCount[i] > maxVotes) { maxVotes = voteCount[i]; winningChoice = i; } } emit OutcomeDetermined(winningChoice); // Here you could transfer rewards or unlock a new game phase } // --- Utility --- function uint2str(uint256 _i) internal pure returns (string memory str) { if (_i == 0) return "0"; uint256 j = _i; uint256 length; while (j != 0) { length++; j /= 10; } bytes memory bstr = new bytes(length); uint256 k = length - 1; while (_i != 0) { bstr[k--] = bytes1(uint8(48 + _i % 10)); _i /= 10; } str = string(bstr); } } ``` **Oracle feed example (Chainlink price feed)** ``` import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol"; AggregatorV3Interface internal priceFeed; constructor(...) { priceFeed = AggregatorV3Interface(0x...); // feed address } function getLatestPrice() public view returns (int) { (,int price,,,) = priceFeed.latestRoundData(); return price; } ``` **How it ties together** 1. At `blockTarget` the owner calls `releaseClue()`, dropping the first puzzle clue. 2. Once a player solves the puzzle, they use the external data (e.g., price feed) to request new information. 3. `receiveOracleData()` is called by the oracle, which appends a new clue that depends on live data. 4. After all clues, the voting period opens. Participants call `castVote()` to pick an ending. 5. After `votingDeadline`, the owner calls `determineOutcome()` to emit the final choice, which can trigger the next chapter or reward distribution. You can replace the simple string clues with encrypted payloads, use ERC‑721 tokens as clue pieces, or plug in VRF for truly random endings. The skeleton keeps the block‑by‑block tension intact while giving you room to iterate. Happy hacking!