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added examples

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This commit is contained in:
Aniket-Engg
2018-12-21 16:50:16 +05:30
parent a781955434
commit c3c5d767ff
7 changed files with 128 additions and 162 deletions
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104
contracts/mocks/SafeERC20Helper.sol
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@ -3,47 +3,28 @@ pragma solidity ^0.4.24;
import "../token/ERC20/IERC20.sol";
import "../token/ERC20/SafeERC20.sol";
contract ERC20FailingMock is IERC20 {
uint256 private _allowance;
function totalSupply() public view returns (uint256) {
return 0;
}
contract ERC20FailingMock {
uint256 private _allowance;
function transfer(address, uint256) public returns (bool) {
return false;
}
function transfer(address, uint256) public returns (bool) {
return false;
}
function transferFrom(address, address, uint256) public returns (bool) {
return false;
}
function transferFrom(address, address, uint256) public returns (bool) {
return false;
}
function approve(address, uint256) public returns (bool) {
return false;
}
function approve(address, uint256) public returns (bool) {
return false;
}
function increaseAllowance(address, uint256) public returns (bool){
return false;
}
function decreaseAllowance(address, uint256) public returns (bool){
return false;
}
function balanceOf(address) public view returns (uint256) {
return 0;
}
function allowance(address, address) public view returns (uint256) {
return 0;
}
function allowance(address, address) public view returns (uint256) {
return 0;
}
}
contract ERC20SucceedingMock is IERC20 {
uint256 private _allowance;
function totalSupply() public view returns (uint256) {
return 0;
}
contract ERC20SucceedingMock {
uint256 private _allowance;
function transfer(address, uint256) public returns (bool) {
return true;
@ -57,33 +38,20 @@ contract ERC20SucceedingMock is IERC20 {
return true;
}
function increaseAllowance(address, uint256) public returns (bool){
return true;
}
function setAllowance(uint256 allowance_) public {
_allowance = allowance_;
}
function decreaseAllowance(address, uint256) public returns (bool){
return true;
}
function balanceOf(address) public view returns (uint256) {
return 0;
}
function allowance(address, address) public view returns (uint256) {
return _allowance;
}
function setAllowance(uint256 value) public {
_allowance = value;
}
function allowance(address, address) public view returns (uint256) {
return _allowance;
}
}
contract SafeERC20Helper {
using SafeERC20 for IERC20;
using SafeERC20 for IERC20;
IERC20 private _failing;
IERC20 private _succeeding;
IERC20 private _failing;
IERC20 private _succeeding;
constructor () public {
_failing = IERC20(new ERC20FailingMock());
@ -130,23 +98,15 @@ contract SafeERC20Helper {
_succeeding.safeIncreaseAllowance(address(0), amount);
}
function doFailingIncreaseAllowance() public {
_failing.safeIncreaseAllowance(address(0), 0);
}
function doFailingDecreaseAllowance() public {
_failing.safeDecreaseAllowance(address(0), 0);
}
function doSucceedingTransfer() public {
_succeeding.safeTransfer(address(0), 0);
}
function doSucceedingDecreaseAllowance(uint256 amount) public {
_succeeding.safeDecreaseAllowance(address(0), amount);
}
function setAllowance(uint256 allowance_) public {
ERC20SucceedingMock(_succeeding).setAllowance(allowance_);
}
function doSucceedingApprove() public {
_succeeding.safeApprove(address(0), 0);
}
}
function allowance() public view returns (uint256) {
return _succeeding.allowance(address(0), address(0));
}
}