building SSR with vite fails due to fs/promises

[olehmisar]

I am using sveltekit and vite to build my app. Running vite build fails with this error:

vite v5.1.4 building SSR bundle for production...
✓ 955 modules transformed.
x Build failed in 9.35s
error during build:
Error: [vite:load-fallback] Could not load /node_modules/.pnpm/node-stdlib-browser@1.2.0/node_modules/node-stdlib-browser/esm/mock/empty.js/promises (imported by ../../node_modules/.pnpm/@aztec+bb.js@0.34.0/node_modules/@aztec/bb.js/dest/node/crs/node/index.js

Looks like node-stdlib-browser does NOT support fs/promises. Not sure why vite wants to use node-stdlib-browser for an SSR build but it is what it is.

I can provide a repro if this issue is going to be fixed.

[olehmisar]

node-stdlib-browser is a dependency of vite-plugin-node-polyfills, which is required for aztec to work with vite

[rahul-kothari]

unforrutnately this is blocked for a bit. Started because we need it for creating proofs, we still need a WASM endpoint for aztec/client IVC

Will tackle 5050 and some of the others though!

[saleel]

Below vite.config fixes the issue for me. Had to explicitly include fs/promises in nodePolyfills for some reason

import { defineConfig } from "vite";
import { nodePolyfills } from "vite-plugin-node-polyfills";
import topLevelAwait from "vite-plugin-top-level-await";

export default defineConfig({
  plugins: [nodePolyfills({ include: ["fs/promises"] }), topLevelAwait()],
});

[rahul-kothari]

@saleel could you and @critesjosh work together to ensure this is reflected in our docs? thanks!

[olehmisar]

looks like this was fixed at some point.

[olehmisar]

not fixed. Failing with this error as of 0.67.0

x Build failed in 7.21s
error during build:
[vite-plugin-sveltekit-compile] ../../node_modules/.pnpm/@aztec+circuits.js@0.67.0_typescript@5.5.4/node_modules/@aztec/circuits.js/dest/structs/client_ivc_proof.js (3:9): "promises" is not exported by "__vite-browser-external", imported by "../../node_modules/.pnpm/@aztec+circuits.js@0.67.0_typescript@5.5.4/node_modules/@aztec/circuits.js/dest/structs/client_ivc_proof.js".
file: /Users/user/repo/node_modules/.pnpm/@aztec+circuits.js@0.67.0_typescript@5.5.4/node_modules/@aztec/circuits.js/dest/structs/client_ivc_proof.js:3:9

1: import { bufferSchemaFor } from '@aztec/foundation/schemas';
2: import { BufferReader, serializeToBuffer } from '@aztec/foundation/serialize';
3: import { promises as fs } from 'fs';
            ^
4: import path from 'path';
5: /**

file: /Users/user/repo/node_modules/.pnpm/@aztec+circuits.js@0.67.0_typescript@5.5.4/node_modules/@aztec/circuits.js/dest/structs/client_ivc_proof.js:3:9

1: import { bufferSchemaFor } from '@aztec/foundation/schemas';
2: import { BufferReader, serializeToBuffer } from '@aztec/foundation/serialize';
3: import { promises as fs } from 'fs';
            ^
4: import path from 'path';
5: /**

../../node_modules/.pnpm/@aztec+circuits.js@0.67.0_typescript@5.5.4/node_modules/@aztec/circuits.js/dest/structs/client_ivc_proof.js (3:9): "promises" is not exported by "__vite-browser-external", imported by "../../node_modules/.pnpm/@aztec+circuits.js@0.67.0_typescript@5.5.4/node_modules/@aztec/circuits.js/dest/structs/client_ivc_proof.js".
file: /Users/user/repo/node_modules/.pnpm/@aztec+circuits.js@0.67.0_typescript@5.5.4/node_modules/@aztec/circuits.js/dest/structs/client_ivc_proof.js:3:9

1: import { bufferSchemaFor } from '@aztec/foundation/schemas';
2: import { BufferReader, serializeToBuffer } from '@aztec/foundation/serialize';
3: import { promises as fs } from 'fs';
            ^
4: import path from 'path';
5: /**

    at getRollupError (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/parseAst.js:392:41)
    at error (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/parseAst.js:388:42)
    at Module.error (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/node-entry.js:13971:16)
    at Module.traceVariable (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/node-entry.js:14419:29)
    at ModuleScope.findVariable (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/node-entry.js:12121:39)
    at ChildScope.findVariable (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/node-entry.js:7467:38)
    at ClassBodyScope.findVariable (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/node-entry.js:7467:38)
    at ChildScope.findVariable (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/node-entry.js:7467:38)
    at FunctionScope.findVariable (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/node-entry.js:7467:38)
    at FunctionBodyScope.findVariable (file:///Users/user/repo/node_modules/.pnpm/rollup@4.21.0/node_modules/rollup/dist/es/shared/node-entry.js:7467:38)

[olehmisar]

it was fixed