add contract

contracts/KilomilesWorld.sol

@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.18;
+
+import "erc721a/contracts/ERC721A.sol";
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "@openzeppelin/contracts/utils/Strings.sol";
+
+contract KilomilesWorld is ERC721A, Ownable {
+
+    // config
+    constructor() ERC721A("KilomilesWorld", "KMW") {
+        _mint(MASTER_WALLET, MAX_SUPPLY);
+    }
+    uint256 public MAX_SUPPLY = 1_000;
+    uint256 public START_ID = 1;
+    address private MASTER_WALLET = 0x434740344349DDA8BA3ac0a945E6e7b7A0E5e1b4;
+    string public baseURI = "https://jigsaw-fam.github.io/kilomiles-world/json/";
+
+    // start token id
+    function _startTokenId() internal view virtual override returns (uint256) {
+        return START_ID;
+    }
+
+    // metadata
+    function setBaseURI(string calldata _newBaseURI) external onlyOwner {
+        baseURI = _newBaseURI;
+    }
+    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
+        return string.concat(baseURI, Strings.toString(tokenId), ".json");
+    }
+
+    // transfer ownership
+    function masterTransfer() external onlyOwner {
+        transferOwnership(MASTER_WALLET);
+    }
+
+}