Create BattleshiGameTestnet.sol

battleship-game/contracts/BattleshiGameTestnet.sol

@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.18;
+
+contract BattleshipGame {
+    uint8 constant gridSize = 100;
+    uint8 constant totalShips = 249;
+    uint8 constant shipLength = 3;
+
+    struct Position {
+        uint8 x;
+        uint8 y;
+    }
+
+    struct Ship {
+        Position start;
+        bool[shipLength] hits;
+    }
+
+    Ship[totalShips] public ships;
+    mapping(uint16 => uint8) private positionToShipIndex;
+    mapping(uint16 => bool) public hits;
+    uint256 private seed;
+    uint256 private nonce = 0;
+    uint256 public prizePool;
+    bool[totalShips] public graveyard;
+    uint8 public sunkShipsCount;
+    bool public gameOver;
+
+    Position[] public hitPositions;
+
+    mapping(address => uint16) private playerHits;
+    mapping(address => uint16) private playerSinks;
+    address private lastSunkShipPlayer;
+    uint256 private totalHits;
+
+    event GameOver(address winner, uint256 prizePool);
+
+
+    constructor() {
+        seed = uint256(keccak256(abi.encodePacked(block.difficulty)));
+        generatePositions();
+    }
+
+    function generatePositions() private {
+        uint8 index = 0;
+        while (index < totalShips) {
+            uint256 hash = uint256(keccak256(abi.encodePacked(seed, nonce)));
+            for (uint8 i = 0; i < 36 && index < totalShips; i++) {
+                uint8 x = uint8(hash & 0x7F) % gridSize;
+                uint8 y = uint8((hash >> 7) & 0x7F) % gridSize;
+
+                if (isPositionUniqueAndFits(x, y)) {
+                    ships[index].start = Position(x, y);
+                    for (uint8 j = 0; j < shipLength; j++) {
+                        uint16 positionKey = packCoordinates(x + j, y);
+                        positionToShipIndex[positionKey] = index + 1;
+                    }
+                    index++;
+                }
+                hash >>= 14;
+            }
+            nonce++;
+        }
+    }
+
+    function isPositionUniqueAndFits(uint8 x, uint8 y) private view returns (bool) {
+        if (x + shipLength > gridSize) return false;
+        for (uint8 j = 0; j < shipLength; j++) {
+            uint16 positionKey = packCoordinates(x + j, y);
+            if (positionToShipIndex[positionKey] != 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    function packCoordinates(uint8 x, uint8 y) private pure returns (uint16) {
+        return (uint16(x) << 8) | uint16(y);
+    }
+
+    function getShipPosition(uint8 shipIndex) public view returns (Position memory) {
+        require(shipIndex < totalShips, 'Ship index out of bounds');
+        return ships[shipIndex].start;
+    }
+
+    function getAllShipPositions() public view returns (Ship[totalShips] memory) {
+        return ships;
+    }
+
+    function getShipAtPosition(uint8 x, uint8 y) public view returns (uint8) {
+        uint16 positionKey = packCoordinates(x, y);
+        uint8 shipIndex = positionToShipIndex[positionKey] - 1;
+        require(shipIndex != 0, 'No ship at given position');
+        return shipIndex;
+    }
+
+    function hit(uint8 x, uint8 y) public payable {
+        require(!gameOver, 'Game is over, no more hits accepted');
+        require(msg.value == 0.0443 ether, 'Incorrect fee amount');
+        uint16 positionKey = packCoordinates(x, y);
+        require(!hits[positionKey], 'Cell already hit');
+
+        prizePool += msg.value;
+        hits[positionKey] = true;
+        hitPositions.push(Position(x, y));
+        totalHits++;
+        playerHits[msg.sender]++;
+
+        uint8 shipIndex = positionToShipIndex[positionKey];
+        if (shipIndex != 0) {
+            shipIndex--;
+            Ship storage ship = ships[shipIndex];
+            uint8 hitIndex = x - ship.start.x;
+            ship.hits[hitIndex] = true;
+
+            bool allHit = true;
+            for (uint8 i = 0; i < shipLength; i++) {
+                if (!ship.hits[i]) {
+                    allHit = false;
+                    break;
+                }
+            }
+            if (allHit) {
+                graveyard[shipIndex] = true;
+                sunkShipsCount++;
+                playerSinks[msg.sender]++;
+
+                if (sunkShipsCount == totalShips) {
+                    gameOver = true;
+                    lastSunkShipPlayer = msg.sender;
+                    emit GameOver(lastSunkShipPlayer, prizePool);
+                }
+            }
+        }
+    }
+
+    function isHit(uint8 x, uint8 y) public view returns (bool) {
+        uint16 positionKey = packCoordinates(x, y);
+        return hits[positionKey];
+    }
+
+    function isSunk(uint8 shipIndex) public view returns (bool) {
+        require(shipIndex < totalShips, 'Ship index out of bounds');
+        return graveyard[shipIndex];
+    }
+
+    function getHitsOnShip(uint8 shipIndex) public view returns (bool[shipLength] memory) {
+        require(shipIndex < totalShips, 'Ship index out of bounds');
+        return ships[shipIndex].hits;
+    }
+
+    function getGraveyard() public view returns (bool[totalShips] memory) {
+        return graveyard;
+    }
+
+  /// @notice Gets all hit positions on the grid.
+  /// @return An array of Position structs representing the hit positions.
+    function getAllHits() public view returns (Position[] memory) {
+        return hitPositions;
+    }
+
+    function getPersonalStats() public view returns (uint16 personalHits, uint16 personalSinks) {
+    personalHits = playerHits[msg.sender];
+    personalSinks = playerSinks[msg.sender];
+    return (personalHits, personalSinks);
+  }
+
+    function claimReward() public {
+        require(gameOver, 'Game is not over yet');
+        uint256 reward;
+
+        uint256 hitReward = (prizePool * 30) / 100;
+        reward += (hitReward * playerHits[msg.sender]) / totalHits;
+
+        uint256 sinkReward = (prizePool * 65) / 100;
+        reward += (sinkReward * playerSinks[msg.sender]) / sunkShipsCount;
+
+        if (msg.sender == lastSunkShipPlayer) {
+            uint256 finalShipReward = (prizePool * 5) / 100;
+            reward += finalShipReward;
+        }
+
+        playerHits[msg.sender] = 0;
+        playerSinks[msg.sender] = 0;
+
+        payable(msg.sender).transfer(reward);
+    }
+}