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add love contract

julienbrg committed 2026-09-17T20:17:46+02:00 Browse files
9bf25a7 parent: f37bb94
added script/Love.s.sol +18 -0
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@@ -0,0 +1,18 @@
1+// SPDX-License-Identifier: MIT
2+pragma solidity ^0.8.30;
3+
4+import {Love} from "../src/Love.sol";
5+import {Script, console} from "forge-std/Script.sol";
6+
7+contract LoveScript is Script {
8+ Love public love;
9+
10+ function run() public {
11+ vm.startBroadcast();
12+
13+ love = new Love();
14+ console.log("Love deployed at", address(love));
15+
16+ vm.stopBroadcast();
17+ }
18+}
new file mode 100644
@@ -0,0 +1,18 @@
1+// SPDX-License-Identifier: MIT
2+pragma solidity ^0.8.30;
3+
4+import {Love} from "../src/Love.sol";
5+import {Script, console} from "forge-std/Script.sol";
6+
7+contract LoveScript is Script {
8+ Love public love;
9+
10+ function run() public {
11+ vm.startBroadcast();
12+
13+ love = new Love();
14+ console.log("Love deployed at", address(love));
15+
16+ vm.stopBroadcast();
17+ }
18+}
added src/Love.sol +25 -0
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@@ -0,0 +1,25 @@
1+// SPDX-License-Identifier: MIT
2+pragma solidity ^0.8.30;
3+
4+/// @title Love
5+/// @notice A minimal on-chain counter of love sent between addresses.
6+contract Love {
7+ mapping(address sender => mapping(address recipient => uint256 amount)) public sent;
8+ mapping(address recipient => uint256 amount) public received;
9+
10+ event LoveSent(address indexed from, address indexed to, uint256 amount);
11+
12+ error SelfLove();
13+ error ZeroAmount();
14+
15+ /// @notice Send `amount` units of love to `to`.
16+ function send(address to, uint256 amount) external {
17+ if (to == msg.sender) revert SelfLove();
18+ if (amount == 0) revert ZeroAmount();
19+
20+ sent[msg.sender][to] += amount;
21+ received[to] += amount;
22+
23+ emit LoveSent(msg.sender, to, amount);
24+ }
25+}
new file mode 100644
@@ -0,0 +1,25 @@
1+// SPDX-License-Identifier: MIT
2+pragma solidity ^0.8.30;
3+
4+/// @title Love
5+/// @notice A minimal on-chain counter of love sent between addresses.
6+contract Love {
7+ mapping(address sender => mapping(address recipient => uint256 amount)) public sent;
8+ mapping(address recipient => uint256 amount) public received;
9+
10+ event LoveSent(address indexed from, address indexed to, uint256 amount);
11+
12+ error SelfLove();
13+ error ZeroAmount();
14+
15+ /// @notice Send `amount` units of love to `to`.
16+ function send(address to, uint256 amount) external {
17+ if (to == msg.sender) revert SelfLove();
18+ if (amount == 0) revert ZeroAmount();
19+
20+ sent[msg.sender][to] += amount;
21+ received[to] += amount;
22+
23+ emit LoveSent(msg.sender, to, amount);
24+ }
25+}
added test/Love.t.sol +67 -0
new file mode 100644
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1+// SPDX-License-Identifier: MIT
2+pragma solidity ^0.8.30;
3+
4+import {Love} from "../src/Love.sol";
5+import {Test} from "forge-std/Test.sol";
6+
7+contract LoveTest is Test {
8+ Love public love;
9+
10+ address alice = makeAddr("alice");
11+ address bob = makeAddr("bob");
12+
13+ event LoveSent(address indexed from, address indexed to, uint256 amount);
14+
15+ function setUp() public {
16+ love = new Love();
17+ }
18+
19+ function test_Send() public {
20+ vm.prank(alice);
21+ love.send(bob, 1);
22+
23+ assertEq(love.sent(alice, bob), 1);
24+ assertEq(love.received(bob), 1);
25+ }
26+
27+ function test_SendAccumulates() public {
28+ vm.startPrank(alice);
29+ love.send(bob, 2);
30+ love.send(bob, 3);
31+ vm.stopPrank();
32+
33+ assertEq(love.sent(alice, bob), 5);
34+ assertEq(love.received(bob), 5);
35+ }
36+
37+ function test_SendEmitsEvent() public {
38+ vm.expectEmit(true, true, false, true);
39+ emit LoveSent(alice, bob, 7);
40+
41+ vm.prank(alice);
42+ love.send(bob, 7);
43+ }
44+
45+ function test_RevertWhen_SendingToSelf() public {
46+ vm.prank(alice);
47+ vm.expectRevert(Love.SelfLove.selector);
48+ love.send(alice, 1);
49+ }
50+
51+ function test_RevertWhen_AmountIsZero() public {
52+ vm.prank(alice);
53+ vm.expectRevert(Love.ZeroAmount.selector);
54+ love.send(bob, 0);
55+ }
56+
57+ function testFuzz_Send(address from, address to, uint256 amount) public {
58+ vm.assume(from != to);
59+ amount = bound(amount, 1, type(uint256).max);
60+
61+ vm.prank(from);
62+ love.send(to, amount);
63+
64+ assertEq(love.sent(from, to), amount);
65+ assertEq(love.received(to), amount);
66+ }
67+}
new file mode 100644
@@ -0,0 +1,67 @@
1+// SPDX-License-Identifier: MIT
2+pragma solidity ^0.8.30;
3+
4+import {Love} from "../src/Love.sol";
5+import {Test} from "forge-std/Test.sol";
6+
7+contract LoveTest is Test {
8+ Love public love;
9+
10+ address alice = makeAddr("alice");
11+ address bob = makeAddr("bob");
12+
13+ event LoveSent(address indexed from, address indexed to, uint256 amount);
14+
15+ function setUp() public {
16+ love = new Love();
17+ }
18+
19+ function test_Send() public {
20+ vm.prank(alice);
21+ love.send(bob, 1);
22+
23+ assertEq(love.sent(alice, bob), 1);
24+ assertEq(love.received(bob), 1);
25+ }
26+
27+ function test_SendAccumulates() public {
28+ vm.startPrank(alice);
29+ love.send(bob, 2);
30+ love.send(bob, 3);
31+ vm.stopPrank();
32+
33+ assertEq(love.sent(alice, bob), 5);
34+ assertEq(love.received(bob), 5);
35+ }
36+
37+ function test_SendEmitsEvent() public {
38+ vm.expectEmit(true, true, false, true);
39+ emit LoveSent(alice, bob, 7);
40+
41+ vm.prank(alice);
42+ love.send(bob, 7);
43+ }
44+
45+ function test_RevertWhen_SendingToSelf() public {
46+ vm.prank(alice);
47+ vm.expectRevert(Love.SelfLove.selector);
48+ love.send(alice, 1);
49+ }
50+
51+ function test_RevertWhen_AmountIsZero() public {
52+ vm.prank(alice);
53+ vm.expectRevert(Love.ZeroAmount.selector);
54+ love.send(bob, 0);
55+ }
56+
57+ function testFuzz_Send(address from, address to, uint256 amount) public {
58+ vm.assume(from != to);
59+ amount = bound(amount, 1, type(uint256).max);
60+
61+ vm.prank(from);
62+ love.send(to, amount);
63+
64+ assertEq(love.sent(from, to), amount);
65+ assertEq(love.received(to), amount);
66+ }
67+}