fix: return default zksolc version if fetching fails

packages/hardhat-zksync-solc/src/compile/downloader.ts

@@ -25,6 +25,7 @@ import {
     ZKSOLC_BIN_REPOSITORY_NAME,
     USER_AGENT,
     ZKSOLC_COMPILER_PATH_VERSION,
+    fallbackLatestZkSolcVersion,
 } from '../constants';
 import { ZkSyncSolcPluginError } from './../errors';
 
@@ -210,7 +211,12 @@ export class ZksolcCompilerDownloader {
         We are currently limited in that each new version requires an update of the plugin version.
     */
     private static async _downloadCompilerVersionInfo(compilersDir: string): Promise<void> {
-        const latestRelease = await getLatestRelease(ZKSOLC_BIN_OWNER, ZKSOLC_BIN_REPOSITORY_NAME, USER_AGENT);
+        const latestRelease = await getLatestRelease(
+            ZKSOLC_BIN_OWNER,
+            ZKSOLC_BIN_REPOSITORY_NAME,
+            USER_AGENT,
+            fallbackLatestZkSolcVersion,
+        );
 
         const releaseToSave = {
             latest: latestRelease,

packages/hardhat-zksync-solc/src/constants.ts

@@ -85,3 +85,6 @@ export const MISSING_LIBRARY_LINK =
 
 export const SOLCJS_EXECUTABLE_CODE = `#!/usr/bin/env node
 "use strict";var __createBinding=this&&this.__createBinding||(Object.create?function(e,t,r,o){void 0===o&&(o=r);var i=Object.getOwnPropertyDescriptor(t,r);i&&("get"in i?t.__esModule:!i.writable&&!i.configurable)||(i={enumerable:!0,get:function(){return t[r]}}),Object.defineProperty(e,o,i)}:function(e,t,r,o){void 0===o&&(o=r),e[o]=t[r]}),__setModuleDefault=this&&this.__setModuleDefault||(Object.create?function(e,t){Object.defineProperty(e,"default",{enumerable:!0,value:t})}:function(e,t){e.default=t}),__importStar=this&&this.__importStar||function(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var r in e)"default"!==r&&Object.prototype.hasOwnProperty.call(e,r)&&__createBinding(t,e,r);return __setModuleDefault(t,e),t},__importDefault=this&&this.__importDefault||function(e){return e&&e.__esModule?e:{default:e}};Object.defineProperty(exports,"__esModule",{value:!0}),exports._loadCompilerSources=void 0;const os_1=__importDefault(require("os")),fs_1=__importDefault(require("fs")),path_1=__importDefault(require("path"));function packageExists(e){try{return require.resolve(e),!0}catch(e){return!1}}function findPackagePath(e,t){let r=t,o=r+"/node_modules/"+e;for(;"/"!==r;){if(packageExists(o))return o;r=path_1.default.dirname(r),o=r+"/node_modules/"+e}}async function getSolc(e,t){var r=findPackagePath("solc/wrapper",t);const{default:o}=await Promise.resolve().then(()=>__importStar(require(r)));return o(_loadCompilerSources(e))}function _loadCompilerSources(e){const t=module.constructor;if(void 0===t._extensions)return require(e);var r=t._extensions[".js"];t._extensions[".js"]=function(e,t){var r=fs_1.default.readFileSync(t,"utf8");Object.getPrototypeOf(e)._compile.call(e,r,t)};e=require(e);return t._extensions[".js"]=r,e}exports._loadCompilerSources=_loadCompilerSources;async function readStdin(){return new Promise(e=>{let t="";process.stdin.on("data",e=>t+=e),process.stdin.on("end",()=>e(t))})}!async function(){var e;const t=await getSolc("SOLCJS_PATH","WORKING_DIR");process.argv.includes("--version")?(e=await t.version(),process.stdout.write("solc, the solidity compiler commandline interface"+os_1.default.EOL),process.stdout.write("Version: "+e+os_1.default.EOL)):(e=await readStdin(),e=t.compile(e),process.stdout.write(e))}();`;
+
+export const fallbackLatestZkSolcVersion = '1.5.3';
+export const fallbackLatestEraCompilerVersion = '1.0.1';

packages/hardhat-zksync-solc/src/utils.ts

@@ -24,6 +24,7 @@ import {
     COMPILER_ZKSOLC_IS_SYSTEM_USE,
     COMPILER_ZKSOLC_FORCE_EVMLA_USE,
     COMPILER_MIN_LINUX_VERSION_WITH_GNU_TOOLCHAIN,
+    fallbackLatestEraCompilerVersion,
 } from './constants';
 import { ZkSyncSolcPluginError } from './errors';
 import {
@@ -348,6 +349,7 @@ export async function getLatestRelease(
     owner: string,
     repo: string,
     userAgent: string,
+    defaultValue: string,
     tagPrefix: string = 'v',
     timeout: number = DEFAULT_TIMEOUT_MILISECONDS,
 ): Promise<any> {
@@ -356,33 +358,39 @@ export async function getLatestRelease(
 
     const { request } = await import('undici');
 
-    const response = await request(url, {
-        headersTimeout: timeout,
-        maxRedirections: 0,
-        method: 'GET',
-        headers: {
-            'User-Agent': `${userAgent}`,
-        },
-    });
-
-    // Check if the response is a redirect
-    if (response.statusCode >= 300 && response.statusCode < 400) {
-        // Get the URL from the 'location' header
-        if (response.headers.location && typeof response.headers.location === 'string') {
-            // Check if the redirect URL matches the expected pattern
-            if (response.headers.location.startsWith(redirectUrlPattern)) {
-                // Extract the tag from the redirect URL
-                return response.headers.location.substring(redirectUrlPattern.length);
+    try {
+        const response = await request(url, {
+            headersTimeout: timeout,
+            maxRedirections: 0,
+            method: 'GET',
+            headers: {
+                'User-Agent': `${userAgent}`,
+            },
+        });
+
+        // Check if the response is a redirect
+        if (response.statusCode >= 300 && response.statusCode < 400) {
+            // Get the URL from the 'location' header
+            if (response.headers.location && typeof response.headers.location === 'string') {
+                // Check if the redirect URL matches the expected pattern
+                if (response.headers.location.startsWith(redirectUrlPattern)) {
+                    // Extract the tag from the redirect URL
+                    return response.headers.location.substring(redirectUrlPattern.length);
+                }
+
+                throw new ZkSyncSolcPluginError(
+                    `Unexpected redirect URL: ${response.headers.location} for URL: ${url}`,
+                );
+            } else {
+                // Throw an error if the 'location' header is missing in a redirect response
+                throw new ZkSyncSolcPluginError(`Redirect location not found for URL: ${url}`);
             }
-
-            throw new ZkSyncSolcPluginError(`Unexpected redirect URL: ${response.headers.location} for URL: ${url}`);
         } else {
-            // Throw an error if the 'location' header is missing in a redirect response
-            throw new ZkSyncSolcPluginError(`Redirect location not found for URL: ${url}`);
+            // Throw an error for non-redirect responses
+            throw new ZkSyncSolcPluginError(`Unexpected response status: ${response.statusCode} for URL: ${url}`);
         }
-    } else {
-        // Throw an error for non-redirect responses
-        throw new ZkSyncSolcPluginError(`Unexpected response status: ${response.statusCode} for URL: ${url}`);
+    } catch {
+        return defaultValue;
     }
 }
 
@@ -396,5 +404,13 @@ export function getZkVmNormalizedVersion(solcVersion: string, zkVmSolcVersion: s
 }
 
 export async function getLatestEraVersion(): Promise<string> {
-    return (await getLatestRelease(ZKSOLC_BIN_OWNER, ZKVM_SOLC_BIN_REPOSITORY_NAME, USER_AGENT, '')).split('-')[1];
+    return (
+        await getLatestRelease(
+            ZKSOLC_BIN_OWNER,
+            ZKVM_SOLC_BIN_REPOSITORY_NAME,
+            USER_AGENT,
+            fallbackLatestEraCompilerVersion,
+            '',
+        )
+    ).split('-')[1];
 }

packages/hardhat-zksync-solc/test/tests/utils.test.ts

@@ -17,6 +17,7 @@ import {
     sha1,
     updateBreakableCompilerConfig,
 } from '../../src/utils';
+import { fallbackLatestZkSolcVersion } from '../../src/constants';
 
 describe('Utils', () => {
     describe('filterSupportedOutputSelections', () => {
@@ -343,7 +344,7 @@ describe('Utils', () => {
                     },
                 );
 
-            const release = await getLatestRelease(owner, repo, userAgent);
+            const release = await getLatestRelease(owner, repo, userAgent, fallbackLatestZkSolcVersion);
 
             expect(release).to.deep.equal('1.0.0');
         });