fix .cjs and package.json in distribution

package.json

@@ -2,29 +2,33 @@
   "name": "@solana-developers/helpers",
   "version": "2.5.4",
   "description": "Solana helper functions",
-  "main": "./dist/cjs/index.js",
-  "module": "./dist/esm/index.js",
-  "types": "./dist/esm/index.d.ts",
   "type": "module",
-  "private": false,
+  "main": "./dist/esm/index.js",
+  "module": "./dist/esm/index.js",
+  "types": "./dist/types/index.d.ts",
   "exports": {
     ".": {
-      "import": "./dist/esm/index.js",
-      "require": "./dist/cjs/index.js"
-    },
-    "./node": {
-      "import": "./dist/esm/node.js",
-      "require": "./dist/cjs/node.js"
+      "import": {
+        "types": "./dist/types/index.d.ts",
+        "default": "./dist/esm/index.js"
+      },
+      "require": {
+        "default": "./dist/cjs/index.cjs"
+      }
     }
   },
+  "private": false,
+  "sideEffects": false,
   "files": [
     "dist"
   ],
-  "sideEffects": false,
   "scripts": {
-    "build": "npm run build:esm && npm run build:cjs",
-    "build:esm": "tsc -p tsconfig.json",
+    "prebuild": "npm run clean",
+    "build": "npm run build:esm && npm run build:cjs && npm run build:types",
+    "build:esm": "tsc -p tsconfig.esm.json",
     "build:cjs": "tsc -p tsconfig.cjs.json",
+    "build:types": "tsc -p tsconfig.types.json",
+    "postbuild": "node post-build.mjs",
     "clean": "rm -rf dist",
     "test": "cd tests && npm run test",
     "test:ci": "cd tests && npm run test:ci"

post-build.mjs

@@ -0,0 +1,68 @@
+// In some cases, where you have { type: module } in package.json at the root
+// We will workaround builds manually, since we aren't using any bundler
+// tsc is missing extensions with esm exports
+// and tsc doesn't export .cjs hence, index.js won't be read as cjs in cjs distribution
+// See https://github.com/microsoft/TypeScript/issues/54593
+
+import { promises as fs } from 'node:fs';
+import { dirname, join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const CJS_DIR = join(__dirname, 'dist', 'cjs');
+const ESM_DIR = join(__dirname, 'dist', 'esm');
+
+async function createPackageJson(dir, type) {
+  const content = JSON.stringify({ type }, null, 2);
+  await fs.writeFile(join(dir, 'package.json'), content);
+  console.log(`Created package.json in ${dir}`);
+}
+
+async function renameIndexFile() {
+  const oldPath = join(CJS_DIR, 'index.js');
+  const newPath = join(CJS_DIR, 'index.cjs');
+  await fs.rename(oldPath, newPath);
+  console.log('Renamed CJS index file to index.cjs');
+}
+
+async function processEsmFiles(dir) {
+    const entries = await fs.readdir(dir, { withFileTypes: true });
+    for (const entry of entries) {
+      const fullPath = join(dir, entry.name);
+      if (entry.isDirectory()) {
+        await processEsmFiles(fullPath);
+      } else if (entry.isFile() && entry.name.endsWith('.js')) {
+        let content = await fs.readFile(fullPath, 'utf8');
+
+        // Add .js extension to import statements
+        content = content.replace(/from\s+['"](\.[^'"]+)['"]/g, "from '$1.js'");
+
+        // Add .js extension to export statements
+        content = content.replace(/export\s+\*\s+from\s+['"](\.[^'"]+)['"]/g, "export * from '$1.js'");
+
+        await fs.writeFile(fullPath, content);
+        console.log(`Processed ESM file: ${fullPath}`);
+      }
+    }
+  }
+
+async function postbuild() {
+  try {
+    // Create package.json files
+    await createPackageJson(CJS_DIR, 'commonjs');
+    await createPackageJson(ESM_DIR, 'module');
+
+    // Rename index.js to index.cjs in CJS directory
+    await renameIndexFile();
+
+    // Process ESM files to add .js extensions
+    await processEsmFiles(ESM_DIR);
+
+    console.log('Postbuild completed successfully!');
+  } catch (error) {
+    console.error('Postbuild failed:', error);
+    process.exit(1);
+  }
+}
+
+postbuild();

tsconfig.cjs.json

@@ -2,6 +2,7 @@
   "extends": "./tsconfig.json",
   "compilerOptions": {
     "module": "CommonJS",
-    "outDir": "./dist/cjs"
+    "outDir": "./dist/cjs",
+    "sourceMap": true
   }
 }

tsconfig.esm.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "ESNext",
+    "outDir": "./dist/esm",
+    "sourceMap": true
+  }
+}

tsconfig.json

@@ -3,17 +3,13 @@
     "target": "ES2018",
     "lib": ["ES2018", "DOM"],
     "moduleResolution": "node",
-    "outDir": "./dist/esm",
-    "rootDir": "./src",
-    "declaration": true,
-    "declarationMap": true,
-    "sourceMap": true,
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
     "strict": true,
     "skipLibCheck": true,
-    "module": "ESNext",
-    "isolatedModules": true
+    "isolatedModules": true,
+    "preserveConstEnums": true,
+    "rootDir": "./src"
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist"]

tsconfig.types.json

@@ -0,0 +1,10 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "ESNext",
+    "declaration": true,
+    "declarationMap": true,
+    "emitDeclarationOnly": true,
+    "outDir": "./dist/types"
+  }
+}