zk-expo/plugin/index.js

Expo Module to create Zero-Knowledge Proofs for Groth16 & Noir on iOS and Android.

const { withDangerousMod } = require('@expo/config-plugins');
const path = require('path');
const fs = require('fs');

/**
 * Strips DWARF debug sections from libnative_rust_lib.a inside the ZkExpo
 * xcframework. Required for Xcode 26+ where dsymutil crashes when the linked
 * binary includes DWARF from ring-crate assembly stubs that have no
 * corresponding debug map entries.
 *
 * `strip -S` removes only DWARF; the symbol table is preserved so linking and
 * Sentry symbolication for all other code are unaffected.
 *
 * @see https://github.com/anudit/zk-expo/issues
 */
function withZkExpoRustFix(config) {
  return withDangerousMod(config, [
    'ios',
    (c) => {
      const podfilePath = path.join(c.modRequest.platformProjectRoot, 'Podfile');
      let contents = fs.readFileSync(podfilePath, 'utf8');

      if (contents.includes('# [withZkExpoRustFix]')) return c;

      const patch = `
    # [withZkExpoRustFix] Strip DWARF from libnative_rust_lib.a (zk-expo / ring crate)
    # dsymutil on Xcode 26+ panics on ring's assembly symbols which have no debug map entry.
    # strip -S removes DWARF only; symbol table is preserved so linking is unaffected.
    zk_xcframework = File.join(installer.sandbox.pod_dir('ZkExpo'), 'libnative_rust_lib.xcframework')
    zk_stripped_marker = File.join(zk_xcframework, '.dwarf_stripped')
    if File.exist?(zk_xcframework) && !File.exist?(zk_stripped_marker)
      Dir.glob(File.join(zk_xcframework, '**', '*.a')).each do |lib|
        system("xcrun strip -S '#{lib}' 2>/dev/null")
      end
      File.write(zk_stripped_marker, '')
    end`;

      contents = contents.replace(
        /(react_native_post_install\([\s\S]*?\)\s*\n)/,
        `$1${patch}\n`,
      );

      fs.writeFileSync(podfilePath, contents);
      return c;
    },
  ]);
}

module.exports = withZkExpoRustFix;