feat: nuke flavor (#11)

No longer used. Will be replaced by "scheme" and "oracleHash" once
AztecProtocol/aztec-packages#12786 is
completed

Author: olehmisar

src/Noir.ts

@@ -61,8 +61,3 @@ export async function getTarget(noirDir: string | HardhatConfig) {
   const path = await import("path");
   return path.join(noirDir, "target");
 }
-
-export type ProofFlavor = keyof typeof ProofFlavor;
-export const ProofFlavor = {
-  ultra_keccak_honk: "ultra_keccak_honk",
-} as const;

src/index.ts

@@ -1,11 +1,10 @@
 import { extendConfig, extendEnvironment } from "hardhat/config";
-import { HardhatPluginError, lazyObject } from "hardhat/plugins";
+import { lazyObject } from "hardhat/plugins";
 import { HardhatConfig, HardhatUserConfig } from "hardhat/types";
 import path from "path";
-import { NoirExtension, ProofFlavor } from "./Noir";
+import { NoirExtension } from "./Noir";
 import "./tasks";
 import "./type-extensions";
-import { PLUGIN_NAME } from "./utils";
 
 extendConfig(
   (config: HardhatConfig, userConfig: Readonly<HardhatUserConfig>) => {
@@ -42,14 +41,8 @@ extendConfig(
     function resolveNoirConfig(
       u: HardhatUserConfig["noir"],
     ): HardhatConfig["noir"] {
-      const flavor: ProofFlavor[] = u.flavor
-        ? Array.isArray(u.flavor)
-          ? u.flavor
-          : [u.flavor]
-        : [ProofFlavor.ultra_keccak_honk];
       return {
         version: u.version,
-        flavor,
         skipNargoWorkspaceCheck: u.skipNargoWorkspaceCheck ?? false,
       };
     }

src/tasks.ts

@@ -8,7 +8,7 @@ import { HardhatPluginError } from "hardhat/plugins";
 import { HardhatConfig } from "hardhat/types";
 import { NoirCache } from "./cache";
 import { installNargo } from "./install";
-import { getTarget, ProofFlavor } from "./Noir";
+import { getTarget } from "./Noir";
 import { makeRunCommand, PLUGIN_NAME } from "./utils";
 
 task(TASK_COMPILE, "Compile and generate circuits and contracts").setAction(
@@ -40,12 +40,7 @@ task(TASK_COMPILE, "Compile and generate circuits and contracts").setAction(
           return;
         }
 
-        for (const flavor of Object.values(ProofFlavor) as ProofFlavor[]) {
-          if (!config.noir.flavor.includes(flavor)) {
-            continue;
-          }
-          await generateSolidityVerifier(file, targetDir, flavor);
-        }
+        await generateSolidityVerifier(file, targetDir);
         await cache.saveJsonFileHash(file);
       }),
     );
@@ -102,43 +97,26 @@ task(
   },
 );
 
-async function generateSolidityVerifier(
-  file: string,
-  targetDir: string,
-  flavor: ProofFlavor,
-) {
+async function generateSolidityVerifier(file: string, targetDir: string) {
   const path = await import("path");
   const fs = await import("fs");
   const { UltraHonkBackend } = await import("@aztec/bb.js");
 
-  let verifier: string;
   const program = JSON.parse(fs.readFileSync(file, "utf-8"));
-  switch (flavor) {
-    case "ultra_keccak_honk": {
-      const backend = new UltraHonkBackend(program.bytecode);
-      const vk = await backend.getVerificationKey({ keccak: true });
-      verifier = await backend.getSolidityVerifier(vk);
-      break;
-    }
-    default: {
-      flavor satisfies never;
-      throw new HardhatPluginError(
-        PLUGIN_NAME,
-        `Unsupported Noir proof flavor: ${flavor}`,
-      );
-    }
-  }
+
+  const backend = new UltraHonkBackend(program.bytecode);
+  const vk = await backend.getVerificationKey({ keccak: true });
+  let verifier = await backend.getSolidityVerifier(vk);
+
   if (typeof verifier !== "string") {
     // bug in bb types
     verifier = new TextDecoder().decode(verifier);
   }
 
   const name = path.basename(file, ".json");
-  console.log(`Generating Solidity ${flavor} verifier for ${name}...`);
-  const nameSuffix =
-    flavor === ProofFlavor.ultra_keccak_honk ? "" : `_${flavor}`;
-  fs.writeFileSync(path.join(targetDir, `${name}${nameSuffix}.sol`), verifier);
-  console.log(`Generated Solidity ${flavor} verifier for ${name}`);
+  console.log(`Generating Solidity verifier for ${name}...`);
+  fs.writeFileSync(path.join(targetDir, `${name}.sol`), verifier);
+  console.log(`Generated Solidity verifier for ${name}`);
 }
 
 async function checkNargoWorkspace(config: HardhatConfig) {

src/type-extensions.ts

@@ -3,7 +3,7 @@
 // To extend one of Hardhat's types, you need to import the module where it has been defined, and redeclare it.
 import "hardhat/types/config";
 import "hardhat/types/runtime";
-import { NoirExtension, ProofFlavor } from "./Noir";
+import { NoirExtension } from "./Noir";
 
 declare module "hardhat/types/config" {
   // This is an example of an extension to one of the Hardhat config values.
@@ -28,15 +28,17 @@ declare module "hardhat/types/config" {
   export interface HardhatUserConfig {
     noir: {
       version: string;
-      flavor?: ProofFlavor | ProofFlavor[];
+      /**
+       * @deprecated no longer used
+       */
+      // TODO: remove this
+      flavor?: unknown;
       skipNargoWorkspaceCheck?: boolean;
     };
   }
 
   export interface HardhatConfig {
-    noir: Omit<Required<HardhatUserConfig["noir"]>, "flavor"> & {
-      flavor: ProofFlavor[];
-    };
+    noir: Omit<Required<HardhatUserConfig["noir"]>, "flavor">;
   }
 }
 

test/fixture-projects/hardhat-project/hardhat.config.ts

@@ -21,7 +21,6 @@ const config: HardhatUserConfig = {
   },
   noir: {
     version: TEST_NOIR_VERSION,
-    flavor: ["ultra_keccak_honk"],
   },
 };