fix: support for vyper version 0.4.0 with the new output identifiers

.changeset/wet-cars-sin.md

@@ -0,0 +1,5 @@
+---
+"@nomiclabs/hardhat-vyper": patch
+---
+
+Support Vyper 0.4.0's new output identifiers (Thanks, @kiriyaga-txfusion!)

packages/hardhat-vyper/src/constants.ts

@@ -3,3 +3,4 @@ export const ARTIFACT_FORMAT_VERSION = "hh-vyper-artifact-1";
 export const DEBUG_NAMESPACE = "hardhat:plugin:vyper";
 export const CACHE_FORMAT_VERSION = "hh-vy-cache-1";
 export const VYPER_FILES_CACHE_FILENAME = "vyper-files-cache.json";
+export const OUTPUT_BREAKABLE_VYPER_VERSION = "0.4.0";

packages/hardhat-vyper/src/index.ts

@@ -23,7 +23,10 @@ import {
   TASK_COMPILE_VYPER_LOG_DOWNLOAD_COMPILER_END,
   TASK_COMPILE_VYPER_LOG_COMPILATION_RESULT,
 } from "./task-names";
-import { DEFAULT_VYPER_VERSION } from "./constants";
+import {
+  DEFAULT_VYPER_VERSION,
+  OUTPUT_BREAKABLE_VYPER_VERSION,
+} from "./constants";
 import { Compiler } from "./compiler";
 import { CompilerDownloader } from "./downloader";
 import {
@@ -344,10 +347,24 @@ ${list}`
           }
         );
 
-        for (const [sourceName, output] of Object.entries(contracts)) {
+        const { localPathToSourceName } = await import(
+          "hardhat/utils/source-names"
+        );
+
+        for (const [contractSourceIdentifier, output] of Object.entries(
+          contracts
+        )) {
+          const sourceName = semver.gte(
+            vyperVersion,
+            OUTPUT_BREAKABLE_VYPER_VERSION
+          )
+            ? await localPathToSourceName(
+                config.paths.root,
+                contractSourceIdentifier
+              )
+            : contractSourceIdentifier;
           const artifact = getArtifactFromVyperOutput(sourceName, output);
           await artifacts.saveArtifactAndDebugFile(artifact);
-
           const file = files.find((f) => f.sourceName === sourceName);
           assertPluginInvariant(
             file !== undefined,

packages/hardhat-vyper/test/fixture-projects/compilation-with-vyper-output-breakable-version/contracts/A.vy

@@ -0,0 +1,8 @@
+# pragma version ~=0.4.0
+
+IMMUTABLE_1: public(immutable(String[4]))
+
+@deploy
+@payable
+def __init__():
+    IMMUTABLE_1 = "A"

packages/hardhat-vyper/test/fixture-projects/compilation-with-vyper-output-breakable-version/contracts/B.vy

@@ -0,0 +1,8 @@
+# pragma version ~=0.4.0
+
+IMMUTABLE_1: public(immutable(String[4]))
+
+@deploy
+@payable
+def __init__():
+    IMMUTABLE_1 = "B"

packages/hardhat-vyper/test/fixture-projects/compilation-with-vyper-output-breakable-version/hardhat.config.js

@@ -0,0 +1,15 @@
+require("../../../src/index");
+
+module.exports = {
+  vyper: {
+    compilers: [
+      {
+        version: "0.4.0",
+        settings: {
+          evmVersion: "paris",
+          optimize: "gas",
+        },
+      },
+    ],
+  },
+};

packages/hardhat-vyper/test/tests.ts

@@ -305,4 +305,16 @@ describe("Vyper plugin", function () {
       );
     });
   });
+
+  describe("compile project with different ouput identifiers returned from the vyper compiler", function () {
+    useFixtureProject("compilation-with-vyper-output-breakable-version");
+    useEnvironment();
+
+    it("Should successfully compile the contracts for versions >= 0.4.0", async function () {
+      await this.env.run(TASK_COMPILE);
+
+      assert.equal(this.env.artifacts.readArtifactSync("A").contractName, "A");
+      assert.equal(this.env.artifacts.readArtifactSync("B").contractName, "B");
+    });
+  });
 });