77 lines
1.8 KiB
Solidity
77 lines
1.8 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.6.0;
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import "../proxy/Initializable.sol";
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// Sample contracts showing upgradeability with multiple inheritance.
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// Child contract inherits from Father and Mother contracts, and Father extends from Gramps.
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//
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// Human
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// / \
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// | Gramps
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// | |
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// Mother Father
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// | |
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// -- Child --
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/**
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* Sample base intializable contract that is a human
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*/
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contract SampleHuman is Initializable {
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bool public isHuman;
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function initialize() public initializer {
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isHuman = true;
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}
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}
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/**
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* Sample base intializable contract that defines a field mother
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*/
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contract SampleMother is Initializable, SampleHuman {
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uint256 public mother;
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function initialize(uint256 value) public initializer virtual {
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SampleHuman.initialize();
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mother = value;
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}
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}
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/**
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* Sample base intializable contract that defines a field gramps
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*/
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contract SampleGramps is Initializable, SampleHuman {
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string public gramps;
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function initialize(string memory value) public initializer virtual {
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SampleHuman.initialize();
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gramps = value;
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}
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}
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/**
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* Sample base intializable contract that defines a field father and extends from gramps
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*/
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contract SampleFather is Initializable, SampleGramps {
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uint256 public father;
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function initialize(string memory _gramps, uint256 _father) public initializer {
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SampleGramps.initialize(_gramps);
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father = _father;
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}
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}
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/**
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* Child extends from mother, father (gramps)
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*/
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contract SampleChild is Initializable, SampleMother, SampleFather {
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uint256 public child;
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function initialize(uint256 _mother, string memory _gramps, uint256 _father, uint256 _child) public initializer {
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SampleMother.initialize(_mother);
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SampleFather.initialize(_gramps, _father);
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child = _child;
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}
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}
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