Address coercion

Address.sol

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.4.22 <0.7.0;

contract Address {
    // address addressA = 0x111122223333444455556666777788889999AAAABBBBCCCCDDDDEEEEFFFFCCCC; notimplicity convertible
    address addressA;
    
    function compressAddressSize() external pure returns(address ) {
        // explicit coercion
        bytes32 constantValue = 0x111122223333444455556666777788889999AAAABBBBCCCCDDDDEEEEFFFFCCCC;
        address resultantAddress  = address(uint160(uint256(constantValue)));
        
        // 20 byte address
        return resultantAddress;
    }
    
}

Owner.sol

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.4.22 <0.7.0;


contract Address {
    
    event OwnerChanged( address indexed oldOwner, address indexed newOwner);
    
    address public owner;
    uint256 public etherValue;
    mapping(address => uint256) public balances;
    
    
    
    constructor() public {
        owner = msg.sender;
        balances[owner] = 0;
        emit OwnerChanged(address(0), owner);
    }
    
    modifier isOwner() {
        require(msg.sender == owner, "The user is not owner");
        _;
    }
    
    function changeOwner(address _newOwner) public isOwner {
        owner = _newOwner;
        emit OwnerChanged(owner, _newOwner);
    }
    

    function send() external payable returns(bool) {
        balances[msg.sender] = msg.value;
        return true;
    }
}