TokenBuyerV2

.github/workflows/subgraph-test.yml

@@ -5,7 +5,7 @@ on: [workflow_dispatch, pull_request, push]
 jobs:
   build_and_test:
     name: Build and Test
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
         with:

.vscode/settings.json

@@ -1,3 +1,5 @@
 {
-    "solidity.formatter": "prettier"
+    "solidity.formatter": "prettier",
+    "solidity.packageDefaultDependenciesContractsDirectory": "src",
+    "solidity.packageDefaultDependenciesDirectory": "lib"
 }

src/ISwapTokensCallback.sol

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-3.0
+
+/// @title swapTokens Callback interface
+
+/*********************************
+ * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
+ * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
+ * ░░░░░░█████████░░█████████░░░ *
+ * ░░░░░░██░░░████░░██░░░████░░░ *
+ * ░░██████░░░████████░░░████░░░ *
+ * ░░██░░██░░░████░░██░░░████░░░ *
+ * ░░██░░██░░░████░░██░░░████░░░ *
+ * ░░░░░░█████████░░█████████░░░ *
+ * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
+ * ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
+ *********************************/
+
+pragma solidity ^0.8.17;
+
+interface ISwapTokensCallback {
+    /**
+     * @notice Called on the {to} in TokenBuyerV2#swapTokens, after sending it sellTokens in exchange for {amount} TokenBuyerV2#paymentToken.
+     * @param caller the `msg.sender` in TokenBuyerV2#swapTokens
+     * @param amount the TokenBuyerV2#paymentToken amount caller is buying sellTokens for
+     * @param data arbitrary data passed through by the caller via the TokenBuyerV2#swapTokens call
+     */
+    function swapTokensCallback(
+        address caller,
+        uint256 amount,
+        bytes calldata data
+    ) external payable;
+}