@cashu/cashu-ts/eslint.config.js

cashu library for communicating with a cashu mint

import eslint from '@eslint/js';
import globals from 'globals';
import tseslint from 'typescript-eslint';
import prettierConfig from 'eslint-config-prettier';
import importPlugin from 'eslint-plugin-import';
import nPlugin from 'eslint-plugin-n';
import promisePlugin from 'eslint-plugin-promise';

export default tseslint.config(
	{
		ignores: [
			'node_modules/**',
			'dist/**',
			'test/**',
			'coverage/**',
			'.jest/**',
			'jest.config.ts',
			'lib/**',
			'*.d.ts',
			'examples/**',
			'vite.config.ts',
			'vitest.workspace.ts',
			'eslint.config.js',
		],
	},
	eslint.configs.recommended,
	...tseslint.configs.recommended,
	...tseslint.configs.recommendedTypeChecked,
	prettierConfig,
	importPlugin.flatConfigs.recommended,
	importPlugin.flatConfigs.typescript,
	nPlugin.configs['flat/recommended-module'],
	promisePlugin.configs['flat/recommended'],
	// Config below adds strict rules, and highlights deprecations.
	// We should try moving towards enabling this over time.
	// ...tseslint.configs.strictTypeChecked,
	{
		languageOptions: {
			globals: {
				...globals.browser,
				...globals.es2021,
			},
			parserOptions: {
				projectService: true,
				tsconfigRootDir: import.meta.dirname,
			},
		},
		rules: {
			// Extra rules and overrides to recommended
			// Prefer short-form (eg: string[][] vs Array<Array<string>>) for simple array types
			'@typescript-eslint/array-type': ['error', { default: 'array-simple' }],
			// Disable base import check as we use TS extensionless imports
			// which are handled by importPlugin (import/no-unresolved)
			'n/no-missing-import': 'off',
			// Require 'type' keyword on type imports/export statements
			// preferring inline type specifiers when fixing
			'@typescript-eslint/consistent-type-imports': [
				'error',
				{ prefer: 'type-imports', fixStyle: 'inline-type-imports' },
			],
			'@typescript-eslint/consistent-type-exports': [
				'error',
				{ fixMixedExportsWithInlineTypeSpecifier: true },
			],
			// Disallow empty functions (NB: must disable base rule for TS)
			'no-empty-function': 'off',
			'@typescript-eslint/no-empty-function': 'error',
			// Promote flatter and cleaner control flows
			'no-else-return': 'error',
			// Ignore experimental features (node: >22.4.0) that we use
			'n/no-unsupported-features/node-builtins': ['error', { ignores: ['CloseEvent'] }],
			// Ensure no node-only modules are used (as we support browsers too)
			'import/no-nodejs-modules': ['error', { allow: ['buffer'] }],
		},
		settings: {
			// Enhanced for import plugin (ensures TS paths resolve without extensions)
			'import/resolver': {
				typescript: { project: './tsconfig.json' }, // Explicitly point to tsconfig for path mappings/aliases if any
				node: true,
			},
		},
	},
);