add slithermoney

Author: xavierdmello

entropy/slithermoney/contracts/.env.example

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+PRIVATE_KEY=

entropy/slithermoney/contracts/.gitignore

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+# Node modules
+/node_modules
+
+# Compilation output
+/dist
+
+# pnpm deploy output
+/bundle
+
+# Hardhat Build Artifacts
+/artifacts
+
+# Hardhat compilation (v2) support directory
+/cache
+
+# Typechain output
+/types
+
+# Hardhat coverage reports
+/coverage
+
+.env

entropy/slithermoney/contracts/README.md

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+config:
+
+cp .env.example .env
+
+
+npx hardhat run scripts/deploy.ts --build-profile production --network base-sepolia

entropy/slithermoney/contracts/config.ts

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+export const config = {
+  84532: { // basesepolia
+    entropyV2Address: "0x41c9e39574f40ad34c79f1c99b66a45efb830d4c",
+    usdcAddress: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
+    wagerAmount: "0.01", // 1 cent
+  },
+  114: { // flare-coston2
+    entropyV2Address: "0x41c9e39574f40ad34c79f1c99b66a45efb830d4c",
+    usdcAddress: "0x573d34311044b51246d022c326b12cd2dffc82a1",
+    wagerAmount: "10", // 1 cent
+  },
+};

entropy/slithermoney/contracts/contracts/Snake.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+import { IEntropyConsumer } from "@pythnetwork/entropy-sdk-solidity/IEntropyConsumer.sol";
+import { IEntropyV2 } from "@pythnetwork/entropy-sdk-solidity/IEntropyV2.sol";
+import {ContractRegistry} from "@flarenetwork/flare-periphery-contracts/coston2/ContractRegistry.sol";
+import {RandomNumberV2Interface} from "@flarenetwork/flare-periphery-contracts/coston2/RandomNumberV2Interface.sol";
+
+interface IERC20 {
+  function transferFrom(address from, address to, uint256 amount) external returns (bool);
+  function transfer(address to, uint256 amount) external returns (bool);
+  function balanceOf(address account) external view returns (uint256);
+}
+ 
+// @param entropyAddress The address of the entropy contract.
+// @param wagerAmount The wager amount in wei.
+// @param usdcAddress The address of the USDC token contract.
+contract Snake is IEntropyConsumer {
+  IEntropyV2 public entropy;
+  bytes32 public number;
+  uint256 public numberAsUint;
+  uint256 public wagerAmount;
+  address public usdcAddress;
+  bool public isFlare;
+  // Player balances and ready states
+  uint256 public player1Balance;
+  uint256 public player2Balance;
+  bool public player1Ready;
+  bool public player2Ready;
+
+  // Flare Random Number V2
+  RandomNumberV2Interface public randomV2;
+ 
+  constructor(address entropyAddress, uint256 _wagerAmount, address _usdcAddress, bool _isFlare) {
+    entropy = IEntropyV2(entropyAddress);
+    wagerAmount = _wagerAmount;
+    usdcAddress = _usdcAddress;
+    randomV2 = ContractRegistry.getRandomNumberV2();
+    isFlare = _isFlare;
+  }
+
+  function requestRandomNumber() external payable {
+    if (isFlare) {
+              (uint256 _randomNumber, bool _isSecure, uint256 _timestamp) = randomV2
+            .getRandomNumber();
+
+            number = bytes32(_randomNumber);
+            numberAsUint = uint256(_randomNumber);
+    } else {
+    uint256 fee = entropy.getFeeV2();
+    uint64 sequenceNumber = entropy.requestV2{ value: fee }();
+    }
+  }
+
+function wagerPlayer1() external payable {
+  require(!player1Ready, "Player 1 already ready");
+  
+  // Transfer USDC from user to contract
+  IERC20 usdc = IERC20(usdcAddress);
+  require(usdc.transferFrom(msg.sender, address(this), wagerAmount), "USDC transfer failed");
+  
+  // Set player 1 ready state
+  player1Ready = true;
+  
+  if (isFlare) {
+    // Flare: use RandomNumberV2 (no fee needed)
+    (uint256 _randomNumber, bool _isSecure, uint256 _timestamp) = randomV2.getRandomNumber();
+    number = bytes32(_randomNumber);
+    numberAsUint = uint256(_randomNumber);
+    
+    // Refund any ETH sent (should be 0, but just in case)
+    if (msg.value > 0) {
+      payable(msg.sender).transfer(msg.value);
+    }
+  } else {
+    // Pyth: require ETH fee and request random number
+    uint256 fee = entropy.getFeeV2();
+    require(msg.value >= fee, "Insufficient ETH for Pyth fee");
+    entropy.requestV2{ value: fee }();
+    
+    // Refund excess ETH if any
+    if (msg.value > fee) {
+      payable(msg.sender).transfer(msg.value - fee);
+    }
+  }
+}
+
+function wagerPlayer2() external payable {
+  require(!player2Ready, "Player 2 already ready");
+  
+  // Transfer USDC from user to contract
+  IERC20 usdc = IERC20(usdcAddress);
+  require(usdc.transferFrom(msg.sender, address(this), wagerAmount), "USDC transfer failed");
+  
+  // Set player 2 ready state
+  player2Ready = true;
+  
+  if (isFlare) {
+    // Flare: use RandomNumberV2 (no fee needed)
+    (uint256 _randomNumber, bool _isSecure, uint256 _timestamp) = randomV2.getRandomNumber();
+    number = bytes32(_randomNumber);
+    numberAsUint = uint256(_randomNumber);
+    
+    // Refund any ETH sent (should be 0, but just in case)
+    if (msg.value > 0) {
+      payable(msg.sender).transfer(msg.value);
+    }
+  } else {
+    // Pyth: require ETH fee and request random number
+    uint256 fee = entropy.getFeeV2();
+    require(msg.value >= fee, "Insufficient ETH for Pyth fee");
+    entropy.requestV2{ value: fee }();
+    
+    // Refund excess ETH if any
+    if (msg.value > fee) {
+      payable(msg.sender).transfer(msg.value - fee);
+    }
+  }
+}
+ 
+
+   function entropyCallback(
+    uint64 sequenceNumber,
+    address provider,
+    bytes32 randomNumber
+  ) internal override {
+    number = randomNumber;
+    numberAsUint = uint256(randomNumber);
+  }
+
+  // This method is required by the IEntropyConsumer interface.
+  // It returns the address of the entropy contract which will call the callback.
+  function getEntropy() internal view override returns (address) {
+    return address(entropy);
+  }
+
+  /**
+   * @notice Consensus-based winner selection with hash verification
+   * @dev NOTE: For hackathon purposes, this is a single function combining what would normally be
+   *      three separate functions (one for each party: player1, player2, server) in a distributed
+   *      consensus system. In production, each party would submit their vote and hash separately
+   *      to prevent collusion and ensure verifiability.
+   * 
+   * @param p1hash Game state hash from player 1
+   * @param p2hash Game state hash from player 2
+   * @param serverhash Game state hash from server
+   * @param p1winner True if player 1 votes for player 1, false if player 1 votes for player 2
+   * @param p2winner True if player 2 votes for player 1, false if player 2 votes for player 2
+   * @param serverwinner True if server votes for player 1, false if server votes for player 2
+   */
+  function chooseWinner(
+    bytes32 p1hash,
+    bytes32 p2hash,
+    bytes32 serverhash,
+    bool p1winner,
+    bool p2winner,
+    bool serverwinner
+  ) external {
+    require(player1Ready && player2Ready, "Both players must be ready");
+    
+    uint256 totalWager = wagerAmount * 2; // Total wager in contract (2 * wagerAmount)
+    
+    // Count votes for player 1 (true votes)
+    uint256 votesForP1 = 0;
+    if (p1winner) votesForP1++;
+    if (p2winner) votesForP1++;
+    if (serverwinner) votesForP1++;
+    
+    // Determine majority winner (2/3 or more)
+    bool p1Wins = votesForP1 >= 2;
+    bool p2Wins = votesForP1 <= 1;
+    
+    if (p1Wins) {
+      // Player 1 wins by majority - verify hashes match among voters
+      bytes32[] memory winnerHashes = new bytes32[](votesForP1);
+      uint256 index = 0;
+      
+      if (p1winner) {
+        winnerHashes[index] = p1hash;
+        index++;
+      }
+      if (p2winner) {
+        winnerHashes[index] = p2hash;
+        index++;
+      }
+      if (serverwinner) {
+        winnerHashes[index] = serverhash;
+        index++;
+      }
+      
+      // Check if all hashes match
+      bool hashesMatch = true;
+      for (uint256 i = 1; i < winnerHashes.length; i++) {
+        if (winnerHashes[0] != winnerHashes[i]) {
+          hashesMatch = false;
+          break;
+        }
+      }
+      
+      if (hashesMatch) {
+        // Hashes match - pay winner the full pot (wager * 2)
+        player1Balance += totalWager;
+      } else {
+        // Hashes don't match - refund both players (split 50/50)
+        player1Balance += wagerAmount;
+        player2Balance += wagerAmount;
+      }
+    } else if (p2Wins) {
+      // Player 2 wins by majority - verify hashes match among voters
+      bytes32[] memory winnerHashes = new bytes32[](3 - votesForP1);
+      uint256 index = 0;
+      
+      if (!p1winner) {
+        winnerHashes[index] = p1hash;
+        index++;
+      }
+      if (!p2winner) {
+        winnerHashes[index] = p2hash;
+        index++;
+      }
+      if (!serverwinner) {
+        winnerHashes[index] = serverhash;
+        index++;
+      }
+      
+      // Check if all hashes match
+      bool hashesMatch = true;
+      for (uint256 i = 1; i < winnerHashes.length; i++) {
+        if (winnerHashes[0] != winnerHashes[i]) {
+          hashesMatch = false;
+          break;
+        }
+      }
+      
+      if (hashesMatch) {
+        // Hashes match - pay winner the full pot (wager * 2)
+        player2Balance += totalWager;
+      } else {
+        // Hashes don't match - refund both players (split 50/50)
+        player1Balance += wagerAmount;
+        player2Balance += wagerAmount;
+      }
+    }
+    
+    // Reset ready states for next game
+    player1Ready = false;
+    player2Ready = false;
+  }
+}
+
+ 
+

entropy/slithermoney/contracts/contracts/Snake.t.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+import {Snake} from "./Snake.sol";
+import {Test} from "forge-std/Test.sol";
+
+contract SnakeTest is Test {
+  Snake snake;
+  address constant ENTROPY_V2_ADDRESS = 0x41c9e39574F40Ad34c79f1C99B66A45eFB830d4c;
+  address constant USDC_ADDRESS = 0x036CbD53842c5426634e7929541eC2318f3dCF7e;
+  uint256 constant WAGER_AMOUNT = 10000; // 1 cent in USDC (6 decimals: 0.01 * 10^6 = 10000)
+
+  function setUp() public {
+    snake = new Snake(ENTROPY_V2_ADDRESS, WAGER_AMOUNT, USDC_ADDRESS, false);
+  }
+
+  function test_EntropyAddress() public view {
+    require(address(snake.entropy()) == ENTROPY_V2_ADDRESS, "Entropy address should match");
+  }
+
+  function test_UsdcAddress() public view {
+    require(snake.usdcAddress() == USDC_ADDRESS, "USDC address should match");
+  }
+
+  function test_WagerAmount() public view {
+    require(snake.wagerAmount() == WAGER_AMOUNT, "Wager amount should match");
+  }
+}