feat: add sample presale contracts

src/mock/launchpad/SampleNFT1155Presale.sol

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+import { NFTPresaleCommon } from "../../launchpad/NFTPresaleCommon.sol";
+import { ERC1155Common, SampleERC1155 } from "../SampleERC1155.sol";
+
+contract SampleNFT1155Presale is SampleERC1155, NFTPresaleCommon {
+  constructor(
+    address admin,
+    string memory name,
+    string memory symbol,
+    string memory uri
+  ) SampleERC1155(admin, name, symbol, uri) { }
+
+  /// @dev Mint NFTs for the launchpad.
+  function mintPresale(
+    address to,
+    uint256 quantity,
+    bytes calldata /* extraData */
+  ) external onlyRole(MINTER_ROLE) returns (uint256[] memory tokenIds, uint256[] memory amounts) {
+    _mint(to, 3, quantity, "");
+    _mint(to, 4, 1, "");
+
+    tokenIds = new uint256[](2);
+    amounts = new uint256[](2);
+    tokenIds[0] = 3;
+    tokenIds[1] = 4;
+
+    amounts[0] = quantity;
+    amounts[1] = 1;
+  }
+
+  function supportsInterface(
+    bytes4 interfaceId
+  ) public view virtual override(ERC1155Common, NFTPresaleCommon) returns (bool) {
+    return ERC1155Common.supportsInterface(interfaceId) || NFTPresaleCommon.supportsInterface(interfaceId);
+  }
+}

src/mock/launchpad/SampleNFT721Presale.sol

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+import { SampleERC721 } from "../SampleERC721.sol";
+
+import { ERC721Common } from "../../ERC721Common.sol";
+import { NFTPresaleCommon } from "../../launchpad/NFTPresaleCommon.sol";
+import { SampleERC721 } from "../SampleERC721.sol";
+
+contract SampleNFT721Presale is SampleERC721, NFTPresaleCommon {
+  constructor(string memory name_, string memory symbol_, string memory uri_) SampleERC721(name_, symbol_, uri_) { }
+
+  /// @dev Mint NFTs for the presale.
+  function mintPresale(
+    address to,
+    uint256 quantity,
+    bytes calldata /* extraData */
+  ) external onlyRole(MINTER_ROLE) returns (uint256[] memory tokenIds, uint256[] memory amounts) {
+    tokenIds = new uint256[](quantity);
+    amounts = new uint256[](quantity);
+    for (uint256 i; i < quantity; ++i) {
+      tokenIds[i] = _mintFor(to);
+      amounts[i] = 1;
+    }
+  }
+
+  function supportsInterface(
+    bytes4 interfaceId
+  ) public view virtual override(ERC721Common, NFTPresaleCommon) returns (bool) {
+    return ERC721Common.supportsInterface(interfaceId) || NFTPresaleCommon.supportsInterface(interfaceId);
+  }
+}