-
Notifications
You must be signed in to change notification settings - Fork 0
/
COWFeeModule.t.sol
175 lines (143 loc) · 6.91 KB
/
COWFeeModule.t.sol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
import { COWFeeModule, ISafe, IGPv2Settlement, GPv2Order, IERC20 } from "src/COWFeeModule.sol";
import { Test, Vm } from "forge-std/Test.sol";
import { console } from "forge-std/console.sol";
contract MockERC20 {
mapping(address => mapping(address => uint256)) public allowance;
mapping(address => uint256) public balanceOf;
function approve(address to, uint256 amt) external {
allowance[msg.sender][to] = amt;
}
function transfer(address to, uint256 amt) external {
balanceOf[msg.sender] -= amt;
balanceOf[to] += amt;
}
}
contract COWFeeModuleTest is Test {
address keeper = makeAddr("keeper");
COWFeeModule module;
MockERC20 mockToken;
address constant targetSafe = 0x423cEc87f19F0778f549846e0801ee267a917935;
address constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
IGPv2Settlement constant settlement = IGPv2Settlement(0x9008D19f58AAbD9eD0D60971565AA8510560ab41);
address vaultRelayer;
address receiver = makeAddr("receiver");
uint256 minOut = 0.01 ether;
function setUp() external {
module = new COWFeeModule(address(settlement), targetSafe, WETH, keeper, bytes32(0), receiver, minOut);
vaultRelayer = module.vaultRelayer();
mockToken = new MockERC20();
vm.label(address(settlement), "settlement");
vm.label(address(vaultRelayer), "vaultRelayer");
vm.label(targetSafe, "targetSafe");
vm.label(address(module), "module");
vm.prank(targetSafe);
ISafe(targetSafe).enableModule(address(module));
}
function testAuth() external {
address[] memory tokens = new address[](0);
vm.expectRevert(COWFeeModule.OnlyKeeper.selector);
module.approve(tokens);
COWFeeModule.Revocation[] memory revocations = new COWFeeModule.Revocation[](0);
vm.expectRevert(COWFeeModule.OnlyKeeper.selector);
module.revoke(revocations);
COWFeeModule.SwapToken[] memory swapTokens = new COWFeeModule.SwapToken[](0);
address[] memory approveTokens = new address[](0);
vm.expectRevert(COWFeeModule.OnlyKeeper.selector);
module.drip(approveTokens, swapTokens);
}
function testApprove() external {
uint256 currentAllowance = mockToken.allowance(address(settlement), address(vaultRelayer));
assertEq(currentAllowance, 0, "current allowance not 0");
address[] memory tokens = new address[](1);
tokens[0] = address(mockToken);
vm.prank(keeper);
module.approve(tokens);
uint256 newAllowance = mockToken.allowance(address(settlement), address(vaultRelayer));
assertEq(newAllowance, type(uint256).max, "allowance not max");
}
function testRevoke() external {
address[] memory tokens = new address[](1);
tokens[0] = address(mockToken);
vm.prank(keeper);
module.approve(tokens);
uint256 currentAllowance = mockToken.allowance(address(settlement), address(vaultRelayer));
assertEq(currentAllowance, type(uint256).max, "current allowance not max");
COWFeeModule.Revocation[] memory revocations = new COWFeeModule.Revocation[](1);
revocations[0] = COWFeeModule.Revocation({ token: address(mockToken), spender: address(vaultRelayer) });
vm.prank(keeper);
module.revoke(revocations);
uint256 newAllowance = mockToken.allowance(address(settlement), address(vaultRelayer));
assertEq(newAllowance, 0, "allowance not 0");
}
event PreSignature(address indexed owner, bytes orderUid, bool signed);
function testDrip() external {
deal(address(mockToken), address(settlement), 100 ether);
uint32 nextValidTo = module.nextValidTo();
bytes32 orderHash = GPv2Order.hash(
GPv2Order.Data({
sellToken: IERC20(address(mockToken)),
buyToken: IERC20(WETH),
receiver: receiver,
sellAmount: 100 ether,
buyAmount: minOut,
validTo: nextValidTo,
appData: bytes32(0),
feeAmount: 0,
kind: GPv2Order.KIND_SELL,
partiallyFillable: true,
sellTokenBalance: GPv2Order.BALANCE_ERC20,
buyTokenBalance: GPv2Order.BALANCE_ERC20
}),
settlement.domainSeparator()
);
bytes memory preSignature = abi.encodePacked(orderHash, address(settlement), nextValidTo);
COWFeeModule.SwapToken[] memory swapTokens = new COWFeeModule.SwapToken[](1);
swapTokens[0] = COWFeeModule.SwapToken({ token: address(mockToken), buyAmount: minOut, sellAmount: 100 ether });
address[] memory approveTokens = new address[](1);
approveTokens[0] = address(mockToken);
uint256 previousAllowance = mockToken.allowance(address(settlement), vaultRelayer);
assertEq(previousAllowance, 0, "previousAllowance not 0");
vm.recordLogs();
vm.prank(keeper);
module.drip(approveTokens, swapTokens);
Vm.Log[] memory logs = vm.getRecordedLogs();
bool found = false;
address owner;
bytes memory orderUid;
bool signed;
for (uint256 i = 0; i < logs.length; i++) {
if (logs[i].topics.length > 0 && logs[i].topics[0] == PreSignature.selector) {
owner = address(uint160(uint256(logs[i].topics[1])));
(orderUid, signed) = abi.decode(logs[i].data, (bytes, bool));
found = true;
break;
}
}
uint256 postDripAllowance = mockToken.allowance(address(settlement), vaultRelayer);
assertEq(postDripAllowance, type(uint256).max, "postDripAllowance not uint.max");
assertTrue(found, "PreSignature not found");
assertEq(owner, address(settlement), "owner not settlement");
assertEq(signed, true, "not signed");
assertEq(orderUid, preSignature, "orderUid not correct");
}
function testDripMinOut() external {
deal(address(mockToken), address(settlement), 100 ether);
uint256 sellAmount = 100 ether;
uint256 buyAmount = 0.001 ether;
COWFeeModule.SwapToken[] memory swapTokens = new COWFeeModule.SwapToken[](1);
swapTokens[0] =
COWFeeModule.SwapToken({ token: address(mockToken), buyAmount: buyAmount, sellAmount: sellAmount });
address[] memory approveTokens = new address[](0);
vm.prank(keeper);
vm.expectRevert(COWFeeModule.BuyAmountTooSmall.selector);
module.drip(approveTokens, swapTokens);
}
function testDripWeth() external {
deal(WETH, address(settlement), minOut);
uint256 balanceBefore = IERC20(WETH).balanceOf(receiver);
vm.prank(keeper);
module.drip(new address[](0), new COWFeeModule.SwapToken[](0));
uint256 balanceAfter = IERC20(WETH).balanceOf(receiver);
assertEq(balanceAfter - balanceBefore, minOut, "drip didnt transfer weth as expected");
}
}