Basic smart contract to transfer ownership of the smart contract.

• Declare compiler version:

  pragma solidity 0.8.2;

• Create contract :

  pragma solidity 0.8.2;
  
  contract MyContract{
  
  }

• Constructor :

  Declare a state variable Owner which will be the address type. Create a constructor and set deployer as a default owner.

  pragma solidity 0.8.2;
  
  contract MyContract{
         
           address public Owner;
            constructor(){
               Owner = msg.sender;
           }
  
  }

       "msg.sender" will be the person who currently connecting with the contract or sender of the message. 

•   Create function transferOwnership() :

  pragma solidity 0.8.2;
    
  contract MyContract{
        address public Owner;
           constructor(){
               Owner = msg.sender;
           }
  
       function transferOwnership(address _newOwner) public {
                require(msg.sender == Owner);
                Owner = _newOwner;  
            }
  }

  This function will get address of new owner as a parameter. require statement allows us to verify that only exisiting owner can call this function.