Signor1

#Explanations

First of all, to create a staking contract there is need to make use of a token for the staking. Creating an ERC20 token is paramount. Then after that, we talk about the components of a staking contract. For a stake to happen, there would be a staker, a range of amount to be staked, the duration of the staking, the reward which will be calculated by the duration and the amount staked, then after a certain duration of staking, the staker can withdraw.

In this solidity staking contract, we have the Solidity version that is ^0.8.20 which would instruct the compiler to use a certain version for compilations.

The Structure of the Contract

1. Contract Definition and Imports
The contract is defined with a name - StakingRewards (Staring it a capital letter is the best practise)

Signor1

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract SchoolManagement {

    //address of the principal
    address public schoolOwner;
    
    //student Id 
     uint8 public studentId;

Signor1

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "contracts/SchoolManagement.sol";

contract SaaS{
    SchoolManagement[] public schools;

    uint public numOfCreatedContract;

Signor1

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract SimpleStorage {
    uint256 private storedData;

    address public owner;

    //initializing the contract deployer to be the owner
    constructor() {

Signor1

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;

contract Functions {
    address public manager;

    address payable[] public players;

    constructor() {
        manager = msg.sender;

Signor1

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract SignorNFT is ERC721URIStorage, Ownable{
    constructor(address initialOwner) Ownable(initialOwner) ERC721("Signor ONE", "SNE"){}

    function mint(address _to, uint256 _tokenId, string calldata _uri) external onlyOwner {

Signor1

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

import "./IERC20.sol";

error ADDRESS_ZERO_DETECTED();
error ZERO_VALUE_NOT_ALLOWED();
error INSUFFICIENT_BALANCE();
error TRANSFER_FROM_FAILED();
error TRANSFER_FAILED();

Signor1

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

error ADDRESS_ZERO_DETECTED();
error ZERO_VALUE_NOT_ALLOWED();
error INSUFFICIENT_BALANCE();

contract SaveEther{

    mapping (address => uint256 ) savings;

Signor1

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

contract TodoList {
    //struct
    struct MyTodoList {
        string title;
        string description;
        bool isDone;
    }

Signor1

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;

contract SimpleStorage {
    uint private _storedData;

    function get() public view returns (uint) {
        return _storedData;
    }