eslint.config.mjs

// Copyright 2026 Circle Internet Group, Inc. All rights reserved.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// @ts-check

import eslint from '@eslint/js'
import tseslint from 'typescript-eslint'
import pluginChaiFriendly from 'eslint-plugin-chai-friendly'

export default tseslint.config(
  {
    ignores: [
      'typechain-types/**',
      'target/**',
      'node_modules/**',
      'datadir/**',
      'contracts/out/**',
      'contracts/cache/**',
      'contracts/lib/**',
      'deployments/**',
      'scripts/localdev.mjs',
      'k6/**',
    ],
  },
  eslint.configs.recommended,
  tseslint.configs.recommendedTypeChecked,
  {
    plugins: { 'chai-friendly': pluginChaiFriendly },
    rules: {
      'no-unused-expressions': 'off', // disable original rule
      '@typescript-eslint/no-unused-expressions': 'off',
      'chai-friendly/no-unused-expressions': 'error',
    },
  },
  {
    languageOptions: {
      parserOptions: {
        projectService: {
          allowDefaultProject: ['*.mjs', '*.js'],
        },
        tsconfigRootDir: import.meta.dirname,
      },
    },
    rules: {
      // https://typescript-eslint.io/rules/no-unused-vars/
      '@typescript-eslint/no-unused-vars': [
        'error',
        {
          argsIgnorePattern: '^_',
          varsIgnorePattern: '^_',
          caughtErrorsIgnorePattern: '^_',
          destructuredArrayIgnorePattern: '^_',
        },
      ],
      '@typescript-eslint/require-await': 'off',
    },
  },
)