Implementation and tests

.github/workflows/test.yml

@@ -7,6 +7,8 @@ on:
 
 env:
   FOUNDRY_PROFILE: ci
+  ETH_RPC_URL: ${{ secrets.ETH_RPC_URL }}
+
 
 jobs:
   check:
@@ -23,7 +25,7 @@ jobs:
       - name: Install Foundry
         uses: foundry-rs/foundry-toolchain@v1
         with:
-          version: nightly
+          version: stable
 
       - name: Show Forge version
         run: |

foundry.toml

@@ -3,7 +3,7 @@ src = "src"
 out = "out"
 script = 'script'
 libs = ["lib"]
-solc = '0.8.26'
+solc = '0.8.24'
 optimizer = false
 
 fs_permissions = [

script/DssBlow2Deploy.s.sol

@@ -0,0 +1,50 @@
+// SPDX-FileCopyrightText: © 2025 Dai Foundation <www.daifoundation.org>
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+pragma solidity ^0.8.24;
+
+import {Script} from "forge-std/Script.sol";
+import {stdJson} from "forge-std/StdJson.sol";
+import {MCD, DssInstance} from "dss-test/MCD.sol";
+import {ScriptTools} from "dss-test/ScriptTools.sol";
+import {DssBlow2Deploy, DssBlow2DeployParams} from "src/deployment/DssBlow2Deploy.sol";
+import {DssBlow2Instance} from "src/deployment/DssBlow2Instance.sol";
+
+contract DssBlow2DeployScript is Script {
+    using stdJson for string;
+    using ScriptTools for string;
+
+    string constant NAME = "dss-blow-2-deploy";
+
+    address constant CHAINLOG = 0xdA0Ab1e0017DEbCd72Be8599041a2aa3bA7e740F;
+    DssInstance dss = MCD.loadFromChainlog(CHAINLOG);
+    address usdsJoin = dss.chainlog.getAddress("USDS_JOIN");
+    DssBlow2Instance inst;
+
+    function run() external {
+        vm.startBroadcast();
+
+        inst = DssBlow2Deploy.deploy(
+            DssBlow2DeployParams({daiJoin: address(dss.daiJoin), usdsJoin: usdsJoin, vow: address(dss.vow)})
+        );
+
+        vm.stopBroadcast();
+
+        ScriptTools.exportContract(NAME, "blow2", inst.blow);
+        ScriptTools.exportContract(NAME, "daiJoin", address(dss.daiJoin));
+        ScriptTools.exportContract(NAME, "usdsJoin", usdsJoin);
+        ScriptTools.exportContract(NAME, "vow", address(dss.vow));
+    }
+}

script/input/1/README.md

@@ -0,0 +1 @@
+Script inputs for Mainnet.

script/output/1/README.md

@@ -0,0 +1 @@
+Script outputs for Mainnet.

src/DssBlow2.sol

@@ -0,0 +1,63 @@
+// SPDX-FileCopyrightText: © 2025 Dai Foundation <www.daifoundation.org>
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+pragma solidity ^0.8.24;
+
+interface ERC20Like {
+    function balanceOf(address) external view returns (uint256);
+    function approve(address usr, uint256 wad) external returns (bool);
+}
+
+interface DaiJoinLike {
+    function dai() external view returns (address);
+    function join(address, uint256) external;
+}
+
+interface UsdsJoinLike is DaiJoinLike {
+    function usds() external view returns (address);
+}
+
+contract DssBlow2 {
+    address public immutable vow;
+    ERC20Like public immutable dai;
+    ERC20Like public immutable usds;
+    DaiJoinLike public immutable daiJoin;
+    UsdsJoinLike public immutable usdsJoin;
+
+    event Blow(address indexed token, uint256 amount);
+
+    constructor(address daiJoin_, address usdsJoin_, address vow_) {
+        daiJoin = DaiJoinLike(daiJoin_);
+        dai = ERC20Like(daiJoin.dai());
+        usdsJoin = UsdsJoinLike(usdsJoin_);
+        usds = ERC20Like(usdsJoin.usds());
+        vow = vow_;
+        dai.approve(daiJoin_, type(uint256).max);
+        usds.approve(usdsJoin_, type(uint256).max);
+    }
+
+    function blow() public {
+        uint256 daiBalance = dai.balanceOf(address(this));
+        if (daiBalance > 0) {
+            daiJoin.join(vow, daiBalance);
+            emit Blow(address(dai), daiBalance);
+        }
+        uint256 usdsBalance = usds.balanceOf(address(this));
+        if (usdsBalance > 0) {
+            usdsJoin.join(vow, usdsBalance);
+            emit Blow(address(usds), usdsBalance);
+        }
+    }
+}

src/DssBlow2.t.sol

@@ -0,0 +1,123 @@
+// SPDX-FileCopyrightText: © 2025 Dai Foundation <www.daifoundation.org>
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+pragma solidity ^0.8.24;
+
+import "dss-test/DssTest.sol";
+import "./DssBlow2.sol";
+
+contract DssBlow2Test is DssTest {
+    address constant CHAINLOG = 0xdA0Ab1e0017DEbCd72Be8599041a2aa3bA7e740F;
+
+    DssInstance dss;
+    DssBlow2 dssBlow2;
+
+    address usds;
+    address usdsJoin;
+    address vow;
+
+    event Blow(address indexed token, uint256 amount);
+
+    function setUp() public {
+        vm.createSelectFork("mainnet");
+        // get all the relevant addresses
+        dss = MCD.loadFromChainlog(CHAINLOG);
+        usds = dss.chainlog.getAddress("USDS");
+        usdsJoin = dss.chainlog.getAddress("USDS_JOIN");
+        vow = address(dss.vow);
+
+        dssBlow2 = new DssBlow2(address(dss.daiJoin), usdsJoin, vow);
+
+        vm.label(address(dss.dai), "Dai");
+        vm.label(address(dss.daiJoin), "DaiJoin");
+        vm.label(usds, "Usds");
+        vm.label(usdsJoin, "UsdsJoin");
+        vm.label(address(dss.vow), "Vow");
+    }
+
+    function test_blow() public {
+        // send dai and usds to DssBlow2
+        uint256 daiAmount = 10 ether;
+        uint256 usdsAmount = 5 ether;
+        deal(address(dss.dai), address(dssBlow2), daiAmount);
+        deal(usds, address(dssBlow2), usdsAmount);
+        // store balances before blow()
+        uint256 vowDaiBalance = dss.vat.dai(vow);
+        uint256 blowDaiBalance = dss.dai.balanceOf(address(dssBlow2));
+        uint256 blowUsdsBalance = ERC20Like(usds).balanceOf(address(dssBlow2));
+        assertEq(blowDaiBalance, daiAmount);
+        assertEq(blowUsdsBalance, usdsAmount);
+        // event emission
+        vm.expectEmit(true, false, false, true);
+        emit Blow(address(dss.dai), daiAmount);
+        vm.expectEmit(true, false, false, true);
+        emit Blow(usds, usdsAmount);
+        // call blow()
+        dssBlow2.blow();
+        // check balances after blow()
+        blowDaiBalance = dss.dai.balanceOf(address(dssBlow2));
+        blowUsdsBalance = ERC20Like(usds).balanceOf(address(dssBlow2));
+        assertEq(blowDaiBalance, 0);
+        assertEq(blowUsdsBalance, 0);
+        // the vat dai balance is in rad so we multiply with ray
+        assertEq(dss.vat.dai(vow), vowDaiBalance + (daiAmount + usdsAmount) * RAY, "blowDaiUsds: vow balance mismatch");
+    }
+
+    function test_blowDai() public {
+        // send only dai to DssBlow2
+        uint256 daiAmount = 10 ether;
+        deal(address(dss.dai), address(dssBlow2), daiAmount);
+        // store balances before blow()
+        uint256 vowDaiBalance = dss.vat.dai(vow);
+        uint256 blowDaiBalance = dss.dai.balanceOf(address(dssBlow2));
+        uint256 blowUsdsBalance = ERC20Like(usds).balanceOf(address(dssBlow2));
+        assertEq(blowDaiBalance, daiAmount);
+        // event emission
+        vm.expectEmit(true, false, false, true);
+        emit Blow(address(dss.dai), daiAmount);
+        // call blow()
+        dssBlow2.blow();
+        // check balances after blow()
+        blowDaiBalance = dss.dai.balanceOf(vow);
+        blowUsdsBalance = ERC20Like(usds).balanceOf(vow);
+        assertEq(blowDaiBalance, 0);
+        assertEq(blowUsdsBalance, 0);
+        // the vat dai balance is in rad so we multiply with ray
+        assertEq(dss.vat.dai(vow), vowDaiBalance + daiAmount * RAY, "blowDai: vow balance mismatch");
+    }
+
+    function test_blowUsds() public {
+        // send only usds to DssBlow2
+        uint256 usdsAmount = 5 ether;
+        deal(usds, address(dssBlow2), usdsAmount);
+        // store balances before blow()
+        uint256 vowDaiBalance = dss.vat.dai(vow);
+        uint256 blowDaiBalance = dss.dai.balanceOf(address(dssBlow2));
+        uint256 blowUsdsBalance = ERC20Like(usds).balanceOf(address(dssBlow2));
+        assertEq(blowUsdsBalance, usdsAmount);
+        // event emission
+        vm.expectEmit(true, false, false, true);
+        emit Blow(usds, usdsAmount);
+        // call blow()
+        dssBlow2.blow();
+        // check balances after blow()
+        blowDaiBalance = dss.dai.balanceOf(address(dssBlow2));
+        blowUsdsBalance = ERC20Like(usds).balanceOf(address(dssBlow2));
+        assertEq(blowDaiBalance, 0);
+        assertEq(blowUsdsBalance, 0);
+        // the vat dai balance is in rad so we multiply with ray
+        assertEq(dss.vat.dai(vow), vowDaiBalance + usdsAmount * RAY, "blowUsds: vow balance mismatch");
+    }
+}

src/deployment/DssBlow2Deploy.sol

@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: © 2025 Dai Foundation <www.daifoundation.org>
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+pragma solidity ^0.8.24;
+
+import {DssBlow2} from "src/DssBlow2.sol";
+import {DssBlow2Instance} from "./DssBlow2Instance.sol";
+
+struct DssBlow2DeployParams {
+    address daiJoin;
+    address usdsJoin;
+    address vow;
+}
+
+library DssBlow2Deploy {
+    function deploy(DssBlow2DeployParams memory p) internal returns (DssBlow2Instance memory r) {
+        r.blow = address(new DssBlow2({daiJoin_: p.daiJoin, usdsJoin_: p.usdsJoin, vow_: p.vow}));
+    }
+}

src/deployment/DssBlow2Instance.sol

@@ -0,0 +1,20 @@
+// SPDX-FileCopyrightText: © 2025 Dai Foundation <www.daifoundation.org>
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+pragma solidity ^0.8.24;
+
+struct DssBlow2Instance {
+    address blow;
+}