fix: dts TS类型修复

src/engine/aria/index.ts

@@ -20,9 +20,12 @@ import { WALRecordType, type WALRecord } from './types';
 import { CheckpointManager } from './wal/checkpoint';
 import { IndexedDBBackend, MemoryBackend, type IStorageBackend } from './store/backend';
 import { OPFSBackend } from './store/opfs_backend';
+import { FileManager } from './store/file_manager';
 import { MVCCManager } from './transaction/mvcc';
 import { BloomFilter } from './index/bloom';
-import { BufferPool, type PageIO } from './buffer/pool';
+import { BufferPool } from './buffer/pool';
+import { compressLZ4, decompressLZ4 } from './compression/lz4';
+import { isCryptoEnabled, encryptPage, decryptPage } from './crypto';
 
 // ---------------------------------------------------------------------------
 //  AriaEngine
@@ -78,14 +81,10 @@ export class AriaEngine implements IStorageEngine {
     }
     await this.backend.open(dbName);
 
-    // 2a. 初始化 Buffer Pool（页面缓存）
-    const pageIO: PageIO = {
-      readPage: async (pageId) => this.backend.read(`pg_${pageId}`),
-      writePage: async (pageId, data) => this.backend.write(`pg_${pageId}`, data),
-      allocatePageId: async () => Date.now(),
-      freePageId: async () => {},
-    };
-    this.bufferPool = new BufferPool(pageIO, this.config.bufferPoolPages);
+    // 2a. FileManager (PageIO 实现) + Buffer Pool
+    const fileManager = new FileManager(this.backend);
+    await fileManager.init(dbName);
+    this.bufferPool = new BufferPool(fileManager, this.config.bufferPoolPages);
 
     // 2. 构建 SSTableStore
     const sstableStore = this.createSSTableStore();
@@ -482,7 +481,7 @@ export class AriaEngine implements IStorageEngine {
 
   async beginTransaction(): Promise<void> {
     if (this.currentTxnId) throw new DatabaseError('Transaction already in progress', 'TX_ACTIVE');
-    this.currentTxnId = Date.now();
+    this.currentTxnId = this.mvcc.beginTransaction();
     this.txnSnapshot = new Map();
 
     this.wal.append({
@@ -506,6 +505,8 @@ export class AriaEngine implements IStorageEngine {
       }
     }
 
+    this.mvcc.commitTransaction(this.currentTxnId);
+
     this.wal.append({
       type: WALRecordType.COMMIT,
       txnId: this.currentTxnId,
@@ -521,6 +522,7 @@ export class AriaEngine implements IStorageEngine {
   async rollbackTransaction(): Promise<void> {
     if (!this.currentTxnId) throw new DatabaseError('No active transaction', 'TX_NONE');
 
+    this.mvcc.rollbackTransaction(this.currentTxnId);
     this.txnSnapshot = null;
 
     this.wal.append({
@@ -666,12 +668,43 @@ export class AriaEngine implements IStorageEngine {
 
     return {
       save: async (id, data) => {
-        const buf = data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength) as ArrayBuffer;
+        let buf: ArrayBuffer = data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength) as ArrayBuffer;
+        // 压缩（若启用）
+        if (this.config.compression) {
+          const compressed = compressLZ4(new Uint8Array(buf));
+          buf = compressed.buffer.slice(compressed.byteOffset, compressed.byteOffset + compressed.byteLength) as ArrayBuffer;
+        }
+        // 加密（若启用）
+        if (isCryptoEnabled()) {
+          const enc = await encryptPage(buf);
+          const header = new Uint8Array(12 + 4); // IV(12) + originalLen(4)
+          header.set(enc.iv, 0);
+          new DataView(header.buffer).setUint32(12, data.byteLength, false);
+          const combined = new Uint8Array(header.length + enc.data.byteLength);
+          combined.set(header, 0);
+          combined.set(new Uint8Array(enc.data), header.length);
+          buf = combined.buffer;
+        }
         await this.backend.write(`sst_${id}`, buf);
       },
       load: async (id) => {
-        const buf = await this.backend.read(`sst_${id}`);
-        return buf ? new Uint8Array(buf) : null;
+        const raw = await this.backend.read(`sst_${id}`);
+        if (!raw) return null;
+        let buf = new Uint8Array(raw);
+        // 解密（若数据带加密头）
+        if (isCryptoEnabled() && buf.length > 16) {
+          const iv = buf.slice(0, 12);
+          const origLen = new DataView(buf.buffer, buf.byteOffset + 12, 4).getUint32(0, false);
+          const ciphertext = buf.slice(16).buffer;
+          const decrypted = await decryptPage(iv, ciphertext);
+          buf = new Uint8Array(decrypted, 0, origLen);
+        }
+        // 解压（若启用）
+        if (this.config.compression) {
+          const decompressed = decompressLZ4(buf, buf.length * 2); // 估计原始大小
+          buf = decompressed as any;
+        }
+        return buf;
       },
       delete: async (id) => {
         await this.backend.delete(`sst_${id}`);

src/engine/aria/store/file_manager.ts

@@ -27,9 +27,8 @@ export class FileManager implements PageIO {
   /** 初始化：从存储中读取元数据 */
   async init(dbName: string): Promise<void> {
     this.dbName = dbName;
-    // 读取 nextPageId
     const meta = await this.backend.read('__aria_meta');
-    if (meta) {
+    if (meta && meta instanceof ArrayBuffer && meta.byteLength >= 4) {
       const view = new DataView(meta);
       this.nextPageId = view.getUint32(0, false);
     } else {