fix(fhevm-cli): make generated address artifacts writable

Author: Eikix

test-suite/fhevm/src/services/EnvWriter.test.ts

@@ -1,5 +1,8 @@
 import { describe, expect, test } from "bun:test";
-import { resolveEnvMap, rewriteRelayerConfig } from "./EnvWriter";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { resolveEnvMap, rewriteRelayerConfig, writeWritableFile } from "./EnvWriter";
 
 describe("resolveEnvMap", () => {
   test("resolves single-level interpolation", () => {
@@ -86,3 +89,13 @@ describe("rewriteRelayerConfig", () => {
     expect(result).toEqual(config);
   });
 });
+
+describe("writeWritableFile", () => {
+  test("writes files with group/world writable mode for bind-mounted address artifacts", async () => {
+    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "fhevm-env-writer-"));
+    const file = path.join(dir, ".env.gateway");
+    await writeWritableFile(file, "A=1\n");
+    const stat = await fs.stat(file);
+    expect(stat.mode & 0o777).toBe(0o666);
+  });
+});

test-suite/fhevm/src/services/EnvWriter.ts

@@ -39,6 +39,11 @@ const ensureWritableDir = async (dir: string) => {
   await fs.chmod(dir, 0o777);
 };
 
+export const writeWritableFile = async (file: string, contents: string) => {
+  await fs.writeFile(file, contents);
+  await fs.chmod(file, 0o666);
+};
+
 export { resolveEnvMap } from "../render-env";
 export { rewriteRelayerConfig } from "../render-config";
 
@@ -137,25 +142,25 @@ export class EnvWriter extends Context.Tag("EnvWriter")<
                 ),
               );
               if (state.discovery) {
-                await fs.writeFile(
+                await writeWritableFile(
                   gatewayAddressesPath,
                   renderGatewayAddressesEnv(state),
                 );
-                await fs.writeFile(
+                await writeWritableFile(
                   gatewayAddressesSolidityPath,
                   renderGatewayAddressesSolidity(state),
                 );
-                await fs.writeFile(
+                await writeWritableFile(
                   paymentBridgingAddressesSolidityPath,
                   renderPaymentBridgingAddressesSolidity(
                     rendered.componentEnvs["gateway-sc"],
                   ),
                 );
-                await fs.writeFile(
+                await writeWritableFile(
                   hostAddressesPath,
                   renderHostAddressesEnv(state),
                 );
-                await fs.writeFile(
+                await writeWritableFile(
                   hostAddressesSolidityPath,
                   renderHostAddressesSolidity(state),
                 );