srivatsa31 · March 14, 2022 10:30 · Feb 13, 2022
diff --git a/DamnSimpleNftStake.sol b/DamnSimpleNftStake.sol
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.7;
+
+import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
+import "@openzeppelin/contracts/token/ERC1155/utils/ERC1155Receiver.sol";
+
+contract NftStaker {
+    IERC1155 public parentNFT;
+
+    struct Stake {
+        uint256 tokenId;
+        uint256 amount;
+        uint256 timestamp;
+    }
+
+    // map staker address to stake details
+    mapping(address => Stake) public stakes;
+
+    // map staker to total staking time 
+    mapping(address => uint256) public stakingTime;    
+
+    constructor() {
+        parentNFT = IERC1155(0xd9145CCE52D386f254917e481eB44e9943F39138); // Change it to your NFT contract addr
+    }
+
+    function stake(uint256 _tokenId, uint256 _amount) public {
+        stakes[msg.sender] = Stake(_tokenId, _amount, block.timestamp); 
+        parentNFT.safeTransferFrom(msg.sender, address(this), _tokenId, _amount, "0x00");
+    } 
+
+    function unstake() public {
+        parentNFT.safeTransferFrom(address(this), msg.sender, stakes[msg.sender].tokenId, stakes[msg.sender].amount, "0x00");
+        stakingTime[msg.sender] += (block.timestamp - stakes[msg.sender].timestamp);
+        delete stakes[msg.sender];
+    }      
+
+     function onERC1155Received(
+        address operator,
+        address from,
+        uint256 id,
+        uint256 value,
+        bytes calldata data
+    ) external returns (bytes4) {
+        return bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"));
+    }
+
+}