opfs for sync in one commit!

2026-01-09 19:24:21 +01:00 · 2025-09-10 03:01:37 +04:00
parent 8ab8b31cb1
commit d55026f84f
75 changed files with 3553 additions and 5535 deletions
--- a/bindings/javascript/sync/packages/native/README.md
+++ b/bindings/javascript/sync/packages/native/README.md
@@ -0,0 +1,125 @@
+<p align="center">
+  <h1 align="center">Turso Database for JavaScript in Node</h1>
+</p>
+
+<p align="center">
+  <a title="JavaScript" target="_blank" href="https://www.npmjs.com/package/@tursodatabase/database"><img alt="npm" src="https://img.shields.io/npm/v/@tursodatabase/database"></a>
+  <a title="MIT" target="_blank" href="https://github.com/tursodatabase/turso/blob/main/LICENSE.md"><img src="http://img.shields.io/badge/license-MIT-orange.svg?style=flat-square"></a>
+</p>
+<p align="center">
+  <a title="Users Discord" target="_blank" href="https://tur.so/discord"><img alt="Chat with other users of Turso on Discord" src="https://img.shields.io/discord/933071162680958986?label=Discord&logo=Discord&style=social"></a>
+</p>
+
+---
+
+## About
+
+This package is the Turso embedded database library for JavaScript in Node.
+
+> **⚠️ Warning:** This software is ALPHA, only use for development, testing, and experimentation. We are working to make it production ready, but do not use it for critical data right now.
+
+## Features
+
+- **SQLite compatible:** SQLite query language and file format support ([status](https://github.com/tursodatabase/turso/blob/main/COMPAT.md)).
+- **In-process**: No network overhead, runs directly in your Node.js process
+- **TypeScript support**: Full TypeScript definitions included
+- **Cross-platform**: Supports Linux (x86 and arm64), macOS, Windows (browser is supported in the separate package `@tursodatabase/database-browser` package)
+
+## Installation
+
+```bash
+npm install @tursodatabase/database
+```
+
+## Getting Started
+
+### In-Memory Database
+
+```javascript
+import { connect } from '@tursodatabase/database';
+
+// Create an in-memory database
+const db = await connect(':memory:');
+
+// Create a table
+await db.exec('CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT, email TEXT)');
+
+// Insert data
+const insert = db.prepare('INSERT INTO users (name, email) VALUES (?, ?)');
+await insert.run('Alice', 'alice@example.com');
+await insert.run('Bob', 'bob@example.com');
+
+// Query data
+const users = await db.prepare('SELECT * FROM users').all();
+console.log(users);
+// Output: [
+//   { id: 1, name: 'Alice', email: 'alice@example.com' },
+//   { id: 2, name: 'Bob', email: 'bob@example.com' }
+// ]
+```
+
+### File-Based Database
+
+```javascript
+import { connect } from '@tursodatabase/database';
+
+// Create or open a database file
+const db = await connect('my-database.db');
+
+// Create a table
+await db.exec(`
+  CREATE TABLE IF NOT EXISTS posts (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    title TEXT NOT NULL,
+    content TEXT,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+  )
+`);
+
+// Insert a post
+const insertPost = db.prepare('INSERT INTO posts (title, content) VALUES (?, ?)');
+const result = await insertPost.run('Hello World', 'This is my first blog post!');
+
+console.log(`Inserted post with ID: ${result.lastInsertRowid}`);
+```
+
+### Transactions
+
+```javascript
+import { connect } from '@tursodatabase/database';
+
+const db = await connect('transactions.db');
+
+// Using transactions for atomic operations
+const transaction = db.transaction(async (users) => {
+  const insert = db.prepare('INSERT INTO users (name, email) VALUES (?, ?)');
+  for (const user of users) {
+    await insert.run(user.name, user.email);
+  }
+});
+
+// Execute transaction
+await transaction([
+  { name: 'Alice', email: 'alice@example.com' },
+  { name: 'Bob', email: 'bob@example.com' }
+]);
+```
+
+## API Reference
+
+For complete API documentation, see [JavaScript API Reference](../../../../docs/javascript-api-reference.md).
+
+## Related Packages
+
+* The [@tursodatabase/serverless](https://www.npmjs.com/package/@tursodatabase/serverless) package provides a serverless driver with the same API.
+* The [@tursodatabase/sync](https://www.npmjs.com/package/@tursodatabase/sync) package provides bidirectional sync between a local Turso database and Turso Cloud. 
+
+## License
+
+This project is licensed under the [MIT license](../../LICENSE.md).
+
+## Support
+
+- [GitHub Issues](https://github.com/tursodatabase/turso/issues)
+- [Documentation](https://docs.turso.tech)
+- [Discord Community](https://tur.so/discord)
--- a/bindings/javascript/sync/packages/native/index.d.ts
+++ b/bindings/javascript/sync/packages/native/index.d.ts
@@ -0,0 +1,244 @@
+/* auto-generated by NAPI-RS */
+/* eslint-disable */
+/** A database connection. */
+export declare class Database {
+  /**
+   * Creates a new database instance.
+   *
+   * # Arguments
+   * * `path` - The path to the database file.
+   */
+  constructor(path: string, opts?: DatabaseOpts | undefined | null)
+  /** Returns whether the database is in memory-only mode. */
+  get memory(): boolean
+  /** Returns whether the database is in memory-only mode. */
+  get path(): string
+  /** Returns whether the database connection is open. */
+  get open(): boolean
+  /**
+   * Executes a batch of SQL statements on main thread
+   *
+   * # Arguments
+   *
+   * * `sql` - The SQL statements to execute.
+   *
+   * # Returns
+   */
+  batchSync(sql: string): void
+  /**
+   * Executes a batch of SQL statements outside of main thread
+   *
+   * # Arguments
+   *
+   * * `sql` - The SQL statements to execute.
+   *
+   * # Returns
+   */
+  batchAsync(sql: string): Promise<void>
+  /**
+   * Prepares a statement for execution.
+   *
+   * # Arguments
+   *
+   * * `sql` - The SQL statement to prepare.
+   *
+   * # Returns
+   *
+   * A `Statement` instance.
+   */
+  prepare(sql: string): Statement
+  /**
+   * Returns the rowid of the last row inserted.
+   *
+   * # Returns
+   *
+   * The rowid of the last row inserted.
+   */
+  lastInsertRowid(): number
+  /**
+   * Returns the number of changes made by the last statement.
+   *
+   * # Returns
+   *
+   * The number of changes made by the last statement.
+   */
+  changes(): number
+  /**
+   * Returns the total number of changes made by all statements.
+   *
+   * # Returns
+   *
+   * The total number of changes made by all statements.
+   */
+  totalChanges(): number
+  /**
+   * Closes the database connection.
+   *
+   * # Returns
+   *
+   * `Ok(())` if the database is closed successfully.
+   */
+  close(): void
+  /**
+   * Sets the default safe integers mode for all statements from this database.
+   *
+   * # Arguments
+   *
+   * * `toggle` - Whether to use safe integers by default.
+   */
+  defaultSafeIntegers(toggle?: boolean | undefined | null): void
+  /** Runs the I/O loop synchronously. */
+  ioLoopSync(): void
+  /** Runs the I/O loop asynchronously, returning a Promise. */
+  ioLoopAsync(): Promise<void>
+}
+
+/** A prepared statement. */
+export declare class Statement {
+  reset(): void
+  /** Returns the number of parameters in the statement. */
+  parameterCount(): number
+  /**
+   * Returns the name of a parameter at a specific 1-based index.
+   *
+   * # Arguments
+   *
+   * * `index` - The 1-based parameter index.
+   */
+  parameterName(index: number): string | null
+  /**
+   * Binds a parameter at a specific 1-based index with explicit type.
+   *
+   * # Arguments
+   *
+   * * `index` - The 1-based parameter index.
+   * * `value_type` - The type constant (0=null, 1=int, 2=float, 3=text, 4=blob).
+   * * `value` - The value to bind.
+   */
+  bindAt(index: number, value: unknown): void
+  /**
+   * Step the statement and return result code (executed on the main thread):
+   * 1 = Row available, 2 = Done, 3 = I/O needed
+   */
+  stepSync(): number
+  /**
+   * Step the statement and return result code (executed on the background thread):
+   * 1 = Row available, 2 = Done, 3 = I/O needed
+   */
+  stepAsync(): Promise<number>
+  /** Get the current row data according to the presentation mode */
+  row(): unknown
+  /** Sets the presentation mode to raw. */
+  raw(raw?: boolean | undefined | null): void
+  /** Sets the presentation mode to pluck. */
+  pluck(pluck?: boolean | undefined | null): void
+  /**
+   * Sets safe integers mode for this statement.
+   *
+   * # Arguments
+   *
+   * * `toggle` - Whether to use safe integers.
+   */
+  safeIntegers(toggle?: boolean | undefined | null): void
+  /** Get column information for the statement */
+  columns(): Promise<any>
+  /** Finalizes the statement. */
+  finalize(): void
+}
+
+export interface DatabaseOpts {
+  tracing?: string
+}
+export declare class GeneratorHolder {
+  resumeSync(error?: string | undefined | null): GeneratorResponse
+  resumeAsync(error?: string | undefined | null): Promise<unknown>
+}
+
+export declare class JsDataCompletion {
+  poison(err: string): void
+  status(value: number): void
+  pushBuffer(value: Buffer): void
+  pushTransform(values: Array<DatabaseRowTransformResultJs>): void
+  done(): void
+}
+
+export declare class JsProtocolIo {
+  takeRequest(): JsProtocolRequestBytes | null
+}
+
+export declare class JsProtocolRequestBytes {
+  request(): JsProtocolRequest
+  completion(): JsDataCompletion
+}
+
+export declare class SyncEngine {
+  constructor(opts: SyncEngineOpts)
+  init(): GeneratorHolder
+  ioLoopSync(): void
+  /** Runs the I/O loop asynchronously, returning a Promise. */
+  ioLoopAsync(): Promise<void>
+  protocolIo(): JsProtocolRequestBytes | null
+  sync(): GeneratorHolder
+  push(): GeneratorHolder
+  stats(): GeneratorHolder
+  pull(): GeneratorHolder
+  checkpoint(): GeneratorHolder
+  open(): Database
+  close(): void
+}
+
+export declare const enum DatabaseChangeTypeJs {
+  Insert = 0,
+  Update = 1,
+  Delete = 2
+}
+
+export interface DatabaseOpts {
+  path: string
+}
+
+export interface DatabaseRowMutationJs {
+  changeTime: number
+  tableName: string
+  id: number
+  changeType: DatabaseChangeTypeJs
+  before?: Record<string, any>
+  after?: Record<string, any>
+  updates?: Record<string, any>
+}
+
+export interface DatabaseRowStatementJs {
+  sql: string
+  values: Array<any>
+}
+
+export type DatabaseRowTransformResultJs =
+  | { type: 'Keep' }
+  | { type: 'Skip' }
+  | { type: 'Rewrite', stmt: DatabaseRowStatementJs }
+
+export type GeneratorResponse =
+  | { type: 'IO' }
+  | { type: 'Done' }
+  | { type: 'SyncEngineStats', operations: number, mainWal: number, revertWal: number, lastPullUnixTime: number, lastPushUnixTime?: number }
+
+export type JsProtocolRequest =
+  | { type: 'Http', method: string, path: string, body?: Array<number>, headers: Array<[string, string]> }
+  | { type: 'FullRead', path: string }
+  | { type: 'FullWrite', path: string, content: Array<number> }
+  | { type: 'Transform', mutations: Array<DatabaseRowMutationJs> }
+
+export interface SyncEngineOpts {
+  path: string
+  clientName?: string
+  walPullBatchSize?: number
+  tracing?: string
+  tablesIgnore?: Array<string>
+  useTransform: boolean
+  protocolVersion?: SyncEngineProtocolVersion
+}
+
+export declare const enum SyncEngineProtocolVersion {
+  Legacy = 0,
+  V1 = 1
+}
--- a/bindings/javascript/sync/packages/native/index.js
+++ b/bindings/javascript/sync/packages/native/index.js
@@ -0,0 +1,520 @@
+// prettier-ignore
+/* eslint-disable */
+// @ts-nocheck
+/* auto-generated by NAPI-RS */
+
+import { createRequire } from 'node:module'
+const require = createRequire(import.meta.url)
+const __dirname = new URL('.', import.meta.url).pathname
+
+const { readFileSync } = require('node:fs')
+let nativeBinding = null
+const loadErrors = []
+
+const isMusl = () => {
+  let musl = false
+  if (process.platform === 'linux') {
+    musl = isMuslFromFilesystem()
+    if (musl === null) {
+      musl = isMuslFromReport()
+    }
+    if (musl === null) {
+      musl = isMuslFromChildProcess()
+    }
+  }
+  return musl
+}
+
+const isFileMusl = (f) => f.includes('libc.musl-') || f.includes('ld-musl-')
+
+const isMuslFromFilesystem = () => {
+  try {
+    return readFileSync('/usr/bin/ldd', 'utf-8').includes('musl')
+  } catch {
+    return null
+  }
+}
+
+const isMuslFromReport = () => {
+  let report = null
+  if (typeof process.report?.getReport === 'function') {
+    process.report.excludeNetwork = true
+    report = process.report.getReport()
+  }
+  if (!report) {
+    return null
+  }
+  if (report.header && report.header.glibcVersionRuntime) {
+    return false
+  }
+  if (Array.isArray(report.sharedObjects)) {
+    if (report.sharedObjects.some(isFileMusl)) {
+      return true
+    }
+  }
+  return false
+}
+
+const isMuslFromChildProcess = () => {
+  try {
+    return require('child_process').execSync('ldd --version', { encoding: 'utf8' }).includes('musl')
+  } catch (e) {
+    // If we reach this case, we don't know if the system is musl or not, so is better to just fallback to false
+    return false
+  }
+}
+
+function requireNative() {
+  if (process.env.NAPI_RS_NATIVE_LIBRARY_PATH) {
+    try {
+      nativeBinding = require(process.env.NAPI_RS_NATIVE_LIBRARY_PATH);
+    } catch (err) {
+      loadErrors.push(err)
+    }
+  } else if (process.platform === 'android') {
+    if (process.arch === 'arm64') {
+      try {
+        return require('./sync.android-arm64.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-android-arm64')
+        const bindingPackageVersion = require('@tursodatabase/sync-android-arm64/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else if (process.arch === 'arm') {
+      try {
+        return require('./sync.android-arm-eabi.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-android-arm-eabi')
+        const bindingPackageVersion = require('@tursodatabase/sync-android-arm-eabi/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else {
+      loadErrors.push(new Error(`Unsupported architecture on Android ${process.arch}`))
+    }
+  } else if (process.platform === 'win32') {
+    if (process.arch === 'x64') {
+      try {
+        return require('./sync.win32-x64-msvc.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-win32-x64-msvc')
+        const bindingPackageVersion = require('@tursodatabase/sync-win32-x64-msvc/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else if (process.arch === 'ia32') {
+      try {
+        return require('./sync.win32-ia32-msvc.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-win32-ia32-msvc')
+        const bindingPackageVersion = require('@tursodatabase/sync-win32-ia32-msvc/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else if (process.arch === 'arm64') {
+      try {
+        return require('./sync.win32-arm64-msvc.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-win32-arm64-msvc')
+        const bindingPackageVersion = require('@tursodatabase/sync-win32-arm64-msvc/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else {
+      loadErrors.push(new Error(`Unsupported architecture on Windows: ${process.arch}`))
+    }
+  } else if (process.platform === 'darwin') {
+    try {
+      return require('./sync.darwin-universal.node')
+    } catch (e) {
+      loadErrors.push(e)
+    }
+    try {
+      const binding = require('@tursodatabase/sync-darwin-universal')
+      const bindingPackageVersion = require('@tursodatabase/sync-darwin-universal/package.json').version
+      if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+        throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+      }
+      return binding
+    } catch (e) {
+      loadErrors.push(e)
+    }
+    if (process.arch === 'x64') {
+      try {
+        return require('./sync.darwin-x64.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-darwin-x64')
+        const bindingPackageVersion = require('@tursodatabase/sync-darwin-x64/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else if (process.arch === 'arm64') {
+      try {
+        return require('./sync.darwin-arm64.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-darwin-arm64')
+        const bindingPackageVersion = require('@tursodatabase/sync-darwin-arm64/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else {
+      loadErrors.push(new Error(`Unsupported architecture on macOS: ${process.arch}`))
+    }
+  } else if (process.platform === 'freebsd') {
+    if (process.arch === 'x64') {
+      try {
+        return require('./sync.freebsd-x64.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-freebsd-x64')
+        const bindingPackageVersion = require('@tursodatabase/sync-freebsd-x64/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else if (process.arch === 'arm64') {
+      try {
+        return require('./sync.freebsd-arm64.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-freebsd-arm64')
+        const bindingPackageVersion = require('@tursodatabase/sync-freebsd-arm64/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else {
+      loadErrors.push(new Error(`Unsupported architecture on FreeBSD: ${process.arch}`))
+    }
+  } else if (process.platform === 'linux') {
+    if (process.arch === 'x64') {
+      if (isMusl()) {
+        try {
+          return require('./sync.linux-x64-musl.node')
+        } catch (e) {
+          loadErrors.push(e)
+        }
+        try {
+          const binding = require('@tursodatabase/sync-linux-x64-musl')
+          const bindingPackageVersion = require('@tursodatabase/sync-linux-x64-musl/package.json').version
+          if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+            throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+          }
+          return binding
+        } catch (e) {
+          loadErrors.push(e)
+        }
+      } else {
+        try {
+          return require('./sync.linux-x64-gnu.node')
+        } catch (e) {
+          loadErrors.push(e)
+        }
+        try {
+          const binding = require('@tursodatabase/sync-linux-x64-gnu')
+          const bindingPackageVersion = require('@tursodatabase/sync-linux-x64-gnu/package.json').version
+          if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+            throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+          }
+          return binding
+        } catch (e) {
+          loadErrors.push(e)
+        }
+      }
+    } else if (process.arch === 'arm64') {
+      if (isMusl()) {
+        try {
+          return require('./sync.linux-arm64-musl.node')
+        } catch (e) {
+          loadErrors.push(e)
+        }
+        try {
+          const binding = require('@tursodatabase/sync-linux-arm64-musl')
+          const bindingPackageVersion = require('@tursodatabase/sync-linux-arm64-musl/package.json').version
+          if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+            throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+          }
+          return binding
+        } catch (e) {
+          loadErrors.push(e)
+        }
+      } else {
+        try {
+          return require('./sync.linux-arm64-gnu.node')
+        } catch (e) {
+          loadErrors.push(e)
+        }
+        try {
+          const binding = require('@tursodatabase/sync-linux-arm64-gnu')
+          const bindingPackageVersion = require('@tursodatabase/sync-linux-arm64-gnu/package.json').version
+          if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+            throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+          }
+          return binding
+        } catch (e) {
+          loadErrors.push(e)
+        }
+      }
+    } else if (process.arch === 'arm') {
+      if (isMusl()) {
+        try {
+          return require('./sync.linux-arm-musleabihf.node')
+        } catch (e) {
+          loadErrors.push(e)
+        }
+        try {
+          const binding = require('@tursodatabase/sync-linux-arm-musleabihf')
+          const bindingPackageVersion = require('@tursodatabase/sync-linux-arm-musleabihf/package.json').version
+          if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+            throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+          }
+          return binding
+        } catch (e) {
+          loadErrors.push(e)
+        }
+      } else {
+        try {
+          return require('./sync.linux-arm-gnueabihf.node')
+        } catch (e) {
+          loadErrors.push(e)
+        }
+        try {
+          const binding = require('@tursodatabase/sync-linux-arm-gnueabihf')
+          const bindingPackageVersion = require('@tursodatabase/sync-linux-arm-gnueabihf/package.json').version
+          if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+            throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+          }
+          return binding
+        } catch (e) {
+          loadErrors.push(e)
+        }
+      }
+    } else if (process.arch === 'riscv64') {
+      if (isMusl()) {
+        try {
+          return require('./sync.linux-riscv64-musl.node')
+        } catch (e) {
+          loadErrors.push(e)
+        }
+        try {
+          const binding = require('@tursodatabase/sync-linux-riscv64-musl')
+          const bindingPackageVersion = require('@tursodatabase/sync-linux-riscv64-musl/package.json').version
+          if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+            throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+          }
+          return binding
+        } catch (e) {
+          loadErrors.push(e)
+        }
+      } else {
+        try {
+          return require('./sync.linux-riscv64-gnu.node')
+        } catch (e) {
+          loadErrors.push(e)
+        }
+        try {
+          const binding = require('@tursodatabase/sync-linux-riscv64-gnu')
+          const bindingPackageVersion = require('@tursodatabase/sync-linux-riscv64-gnu/package.json').version
+          if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+            throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+          }
+          return binding
+        } catch (e) {
+          loadErrors.push(e)
+        }
+      }
+    } else if (process.arch === 'ppc64') {
+      try {
+        return require('./sync.linux-ppc64-gnu.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-linux-ppc64-gnu')
+        const bindingPackageVersion = require('@tursodatabase/sync-linux-ppc64-gnu/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else if (process.arch === 's390x') {
+      try {
+        return require('./sync.linux-s390x-gnu.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-linux-s390x-gnu')
+        const bindingPackageVersion = require('@tursodatabase/sync-linux-s390x-gnu/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else {
+      loadErrors.push(new Error(`Unsupported architecture on Linux: ${process.arch}`))
+    }
+  } else if (process.platform === 'openharmony') {
+    if (process.arch === 'arm64') {
+      try {
+        return require('./sync.openharmony-arm64.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-openharmony-arm64')
+        const bindingPackageVersion = require('@tursodatabase/sync-openharmony-arm64/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else if (process.arch === 'x64') {
+      try {
+        return require('./sync.openharmony-x64.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-openharmony-x64')
+        const bindingPackageVersion = require('@tursodatabase/sync-openharmony-x64/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else if (process.arch === 'arm') {
+      try {
+        return require('./sync.openharmony-arm.node')
+      } catch (e) {
+        loadErrors.push(e)
+      }
+      try {
+        const binding = require('@tursodatabase/sync-openharmony-arm')
+        const bindingPackageVersion = require('@tursodatabase/sync-openharmony-arm/package.json').version
+        if (bindingPackageVersion !== '0.1.5-pre.3' && process.env.NAPI_RS_ENFORCE_VERSION_CHECK && process.env.NAPI_RS_ENFORCE_VERSION_CHECK !== '0') {
+          throw new Error(`Native binding package version mismatch, expected 0.1.5-pre.3 but got ${bindingPackageVersion}. You can reinstall dependencies to fix this issue.`)
+        }
+        return binding
+      } catch (e) {
+        loadErrors.push(e)
+      }
+    } else {
+      loadErrors.push(new Error(`Unsupported architecture on OpenHarmony: ${process.arch}`))
+    }
+  } else {
+    loadErrors.push(new Error(`Unsupported OS: ${process.platform}, architecture: ${process.arch}`))
+  }
+}
+
+nativeBinding = requireNative()
+
+if (!nativeBinding || process.env.NAPI_RS_FORCE_WASI) {
+  try {
+    nativeBinding = require('./sync.wasi.cjs')
+  } catch (err) {
+    if (process.env.NAPI_RS_FORCE_WASI) {
+      loadErrors.push(err)
+    }
+  }
+  if (!nativeBinding) {
+    try {
+      nativeBinding = require('@tursodatabase/sync-wasm32-wasi')
+    } catch (err) {
+      if (process.env.NAPI_RS_FORCE_WASI) {
+        loadErrors.push(err)
+      }
+    }
+  }
+}
+
+if (!nativeBinding) {
+  if (loadErrors.length > 0) {
+    throw new Error(
+      `Cannot find native binding. ` +
+        `npm has a bug related to optional dependencies (https://github.com/npm/cli/issues/4828). ` +
+        'Please try `npm i` again after removing both package-lock.json and node_modules directory.',
+      { cause: loadErrors }
+    )
+  }
+  throw new Error(`Failed to load native binding`)
+}
+
+const { Database, Statement, GeneratorHolder, JsDataCompletion, JsProtocolIo, JsProtocolRequestBytes, SyncEngine, DatabaseChangeTypeJs, SyncEngineProtocolVersion } = nativeBinding
+export { Database }
+export { Statement }
+export { GeneratorHolder }
+export { JsDataCompletion }
+export { JsProtocolIo }
+export { JsProtocolRequestBytes }
+export { SyncEngine }
+export { DatabaseChangeTypeJs }
+export { SyncEngineProtocolVersion }
--- a/bindings/javascript/sync/packages/native/package.json
+++ b/bindings/javascript/sync/packages/native/package.json
@@ -0,0 +1,53 @@
+{
+  "name": "@tursodatabase/sync",
+  "version": "0.1.5",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/tursodatabase/turso"
+  },
+  "license": "MIT",
+  "module": "./dist/promise.js",
+  "main": "./dist/promise.js",
+  "type": "module",
+  "exports": {
+    ".": "./dist/promise.js",
+    "./compat": "./dist/compat.js"
+  },
+  "files": [
+    "index.js",
+    "dist/**",
+    "README.md"
+  ],
+  "packageManager": "yarn@4.9.2",
+  "devDependencies": {
+    "@napi-rs/cli": "^3.1.5",
+    "@types/node": "^24.3.1",
+    "typescript": "^5.9.2",
+    "vitest": "^3.2.4"
+  },
+  "scripts": {
+    "napi-build": "napi build --platform --release --esm --manifest-path ../../Cargo.toml --output-dir .",
+    "napi-dirs": "napi create-npm-dirs",
+    "napi-artifacts": "napi artifacts --output-dir .",
+    "tsc-build": "npm exec tsc",
+    "build": "npm run napi-build && npm run tsc-build",
+    "test": "vitest --run",
+    "prepublishOnly": "npm run napi-dirs && npm run napi-artifacts && napi prepublish -t npm"
+  },
+  "napi": {
+    "binaryName": "sync",
+    "targets": [
+      "x86_64-unknown-linux-gnu",
+      "x86_64-pc-windows-msvc",
+      "universal-apple-darwin",
+      "aarch64-unknown-linux-gnu"
+    ]
+  },
+  "dependencies": {
+    "@tursodatabase/database-common": "^0.1.5",
+    "@tursodatabase/sync-common": "^0.1.5"
+  },
+  "imports": {
+    "#index": "./index.js"
+  }
+}
--- a/bindings/javascript/sync/packages/native/promise.test.ts
+++ b/bindings/javascript/sync/packages/native/promise.test.ts
@@ -0,0 +1,288 @@
+import { unlinkSync } from "node:fs";
+import { expect, test } from 'vitest'
+import { connect, DatabaseRowMutation, DatabaseRowTransformResult } from './promise.js'
+
+const localeCompare = (a, b) => a.x.localeCompare(b.x);
+
+test('select-after-push', async () => {
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("CREATE TABLE IF NOT EXISTS t(x)");
+        await db.exec("DELETE FROM t");
+        await db.push();
+        await db.close();
+    }
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("INSERT INTO t VALUES (1), (2), (3)");
+        await db.push();
+    }
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        const rows = await db.prepare('SELECT * FROM t').all();
+        expect(rows).toEqual([{ x: 1 }, { x: 2 }, { x: 3 }])
+    }
+})
+
+test('select-without-push', async () => {
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("CREATE TABLE IF NOT EXISTS t(x)");
+        await db.exec("DELETE FROM t");
+        await db.push();
+        await db.close();
+    }
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("INSERT INTO t VALUES (1), (2), (3)");
+    }
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        const rows = await db.prepare('SELECT * FROM t').all();
+        expect(rows).toEqual([])
+    }
+})
+
+test('merge-non-overlapping-keys', async () => {
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("CREATE TABLE IF NOT EXISTS q(x TEXT PRIMARY KEY, y)");
+        await db.exec("DELETE FROM q");
+        await db.push();
+        await db.close();
+    }
+    const db1 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+    await db1.exec("INSERT INTO q VALUES ('k1', 'value1'), ('k2', 'value2')");
+
+    const db2 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+    await db2.exec("INSERT INTO q VALUES ('k3', 'value3'), ('k4', 'value4'), ('k5', 'value5')");
+
+    await Promise.all([db1.push(), db2.push()]);
+    await Promise.all([db1.pull(), db2.pull()]);
+
+    const rows1 = await db1.prepare('SELECT * FROM q').all();
+    const rows2 = await db1.prepare('SELECT * FROM q').all();
+    const expected = [{ x: 'k1', y: 'value1' }, { x: 'k2', y: 'value2' }, { x: 'k3', y: 'value3' }, { x: 'k4', y: 'value4' }, { x: 'k5', y: 'value5' }];
+    expect(rows1.sort(localeCompare)).toEqual(expected.sort(localeCompare))
+    expect(rows2.sort(localeCompare)).toEqual(expected.sort(localeCompare))
+})
+
+test('last-push-wins', async () => {
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("CREATE TABLE IF NOT EXISTS q(x TEXT PRIMARY KEY, y)");
+        await db.exec("DELETE FROM q");
+        await db.push();
+        await db.close();
+    }
+    const db1 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+    await db1.exec("INSERT INTO q VALUES ('k1', 'value1'), ('k2', 'value2'), ('k4', 'value4')");
+
+    const db2 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+    await db2.exec("INSERT INTO q VALUES ('k1', 'value3'), ('k2', 'value4'), ('k3', 'value5')");
+
+    await db2.push();
+    await db1.push();
+    await Promise.all([db1.pull(), db2.pull()]);
+
+    const rows1 = await db1.prepare('SELECT * FROM q').all();
+    const rows2 = await db1.prepare('SELECT * FROM q').all();
+    const expected = [{ x: 'k1', y: 'value1' }, { x: 'k2', y: 'value2' }, { x: 'k3', y: 'value5' }, { x: 'k4', y: 'value4' }];
+    expect(rows1.sort(localeCompare)).toEqual(expected.sort(localeCompare))
+    expect(rows2.sort(localeCompare)).toEqual(expected.sort(localeCompare))
+})
+
+test('last-push-wins-with-delete', async () => {
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("CREATE TABLE IF NOT EXISTS q(x TEXT PRIMARY KEY, y)");
+        await db.exec("DELETE FROM q");
+        await db.push();
+        await db.close();
+    }
+    const db1 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+    await db1.exec("INSERT INTO q VALUES ('k1', 'value1'), ('k2', 'value2'), ('k4', 'value4')");
+    await db1.exec("DELETE FROM q")
+
+    const db2 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+    await db2.exec("INSERT INTO q VALUES ('k1', 'value3'), ('k2', 'value4'), ('k3', 'value5')");
+
+    await db2.push();
+    await db1.push();
+    await Promise.all([db1.pull(), db2.pull()]);
+
+    const rows1 = await db1.prepare('SELECT * FROM q').all();
+    const rows2 = await db1.prepare('SELECT * FROM q').all();
+    const expected = [{ x: 'k3', y: 'value5' }];
+    expect(rows1).toEqual(expected)
+    expect(rows2).toEqual(expected)
+})
+
+test('constraint-conflict', async () => {
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("CREATE TABLE IF NOT EXISTS u(x TEXT PRIMARY KEY, y UNIQUE)");
+        await db.exec("DELETE FROM u");
+        await db.push();
+        await db.close();
+    }
+    const db1 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+    await db1.exec("INSERT INTO u VALUES ('k1', 'value1')");
+
+    const db2 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+    await db2.exec("INSERT INTO u VALUES ('k2', 'value1')");
+
+    await db1.push();
+    await expect(async () => await db2.push()).rejects.toThrow('SQLite error: UNIQUE constraint failed: u.y');
+})
+
+test('checkpoint', async () => {
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("CREATE TABLE IF NOT EXISTS q(x TEXT PRIMARY KEY, y)");
+        await db.exec("DELETE FROM q");
+        await db.push();
+        await db.close();
+    }
+    const db1 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+    for (let i = 0; i < 1000; i++) {
+        await db1.exec(`INSERT INTO q VALUES ('k${i}', 'v${i}')`);
+    }
+    expect((await db1.stats()).mainWal).toBeGreaterThan(4096 * 1000);
+    await db1.checkpoint();
+    expect((await db1.stats()).mainWal).toBe(0);
+    let revertWal = (await db1.stats()).revertWal;
+    expect(revertWal).toBeLessThan(4096 * 1000 / 100);
+
+    for (let i = 0; i < 1000; i++) {
+        await db1.exec(`UPDATE q SET y = 'u${i}' WHERE x = 'k${i}'`);
+    }
+    await db1.checkpoint();
+    expect((await db1.stats()).revertWal).toBe(revertWal);
+})
+
+test('persistence', async () => {
+    {
+        const db = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL });
+        await db.exec("CREATE TABLE IF NOT EXISTS q(x TEXT PRIMARY KEY, y)");
+        await db.exec("DELETE FROM q");
+        await db.push();
+        await db.close();
+    }
+    const path = `test-${(Math.random() * 10000) | 0}.db`;
+    try {
+        {
+            const db1 = await connect({ path: path, url: process.env.VITE_TURSO_DB_URL });
+            await db1.exec(`INSERT INTO q VALUES ('k1', 'v1')`);
+            await db1.exec(`INSERT INTO q VALUES ('k2', 'v2')`);
+            await db1.close();
+        }
+
+        {
+            const db2 = await connect({ path: path, url: process.env.VITE_TURSO_DB_URL });
+            await db2.exec(`INSERT INTO q VALUES ('k3', 'v3')`);
+            await db2.exec(`INSERT INTO q VALUES ('k4', 'v4')`);
+            const rows = await db2.prepare('SELECT * FROM q').all();
+            const expected = [{ x: 'k1', y: 'v1' }, { x: 'k2', y: 'v2' }, { x: 'k3', y: 'v3' }, { x: 'k4', y: 'v4' }];
+            expect(rows).toEqual(expected)
+            await db2.close();
+        }
+
+        {
+            const db3 = await connect({ path: path, url: process.env.VITE_TURSO_DB_URL });
+            await db3.push();
+            await db3.close();
+        }
+
+        {
+            const db4 = await connect({ path: path, url: process.env.VITE_TURSO_DB_URL });
+            const rows = await db4.prepare('SELECT * FROM q').all();
+            const expected = [{ x: 'k1', y: 'v1' }, { x: 'k2', y: 'v2' }, { x: 'k3', y: 'v3' }, { x: 'k4', y: 'v4' }];
+            expect(rows).toEqual(expected)
+            await db4.close();
+        }
+    } finally {
+        unlinkSync(path);
+        unlinkSync(`${path}-wal`);
+        unlinkSync(`${path}-info`);
+        unlinkSync(`${path}-changes`);
+        try { unlinkSync(`${path}-revert`) } catch (e) { }
+    }
+})
+
+test('transform', async () => {
+    {
+        const db = await connect({
+            path: ':memory:',
+            url: process.env.VITE_TURSO_DB_URL,
+        });
+        await db.exec("CREATE TABLE IF NOT EXISTS counter(key TEXT PRIMARY KEY, value INTEGER)");
+        await db.exec("DELETE FROM counter");
+        await db.exec("INSERT INTO counter VALUES ('1', 0)")
+        await db.push();
+        await db.close();
+    }
+    const transform = (m: DatabaseRowMutation) => ({
+        operation: 'rewrite',
+        stmt: {
+            sql: `UPDATE counter SET value = value + ? WHERE key = ?`,
+            values: [m.after.value - m.before.value, m.after.key]
+        }
+    } as DatabaseRowTransformResult);
+    const db1 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL, transform: transform });
+    const db2 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL, transform: transform });
+
+    await db1.exec("UPDATE counter SET value = value + 1 WHERE key = '1'");
+    await db2.exec("UPDATE counter SET value = value + 1 WHERE key = '1'");
+
+    await Promise.all([db1.push(), db2.push()]);
+    await Promise.all([db1.pull(), db2.pull()]);
+
+    const rows1 = await db1.prepare('SELECT * FROM counter').all();
+    const rows2 = await db2.prepare('SELECT * FROM counter').all();
+    expect(rows1).toEqual([{ key: '1', value: 2 }]);
+    expect(rows2).toEqual([{ key: '1', value: 2 }]);
+})
+
+test('transform-many', async () => {
+    {
+        const db = await connect({
+            path: ':memory:',
+            url: process.env.VITE_TURSO_DB_URL,
+        });
+        await db.exec("CREATE TABLE IF NOT EXISTS counter(key TEXT PRIMARY KEY, value INTEGER)");
+        await db.exec("DELETE FROM counter");
+        await db.exec("INSERT INTO counter VALUES ('1', 0)")
+        await db.push();
+        await db.close();
+    }
+    const transform = (m: DatabaseRowMutation) => ({
+        operation: 'rewrite',
+        stmt: {
+            sql: `UPDATE counter SET value = value + ? WHERE key = ?`,
+            values: [m.after.value - m.before.value, m.after.key]
+        }
+    } as DatabaseRowTransformResult);
+    const db1 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL, transform: transform });
+    const db2 = await connect({ path: ':memory:', url: process.env.VITE_TURSO_DB_URL, transform: transform });
+
+    for (let i = 0; i < 1002; i++) {
+        await db1.exec("UPDATE counter SET value = value + 1 WHERE key = '1'");
+    }
+    for (let i = 0; i < 1001; i++) {
+        await db2.exec("UPDATE counter SET value = value + 1 WHERE key = '1'");
+    }
+
+    let start = performance.now();
+    await Promise.all([db1.push(), db2.push()]);
+    console.info('push', performance.now() - start);
+
+    start = performance.now();
+    await Promise.all([db1.pull(), db2.pull()]);
+    console.info('pull', performance.now() - start);
+
+    const rows1 = await db1.prepare('SELECT * FROM counter').all();
+    const rows2 = await db2.prepare('SELECT * FROM counter').all();
+    expect(rows1).toEqual([{ key: '1', value: 1001 + 1002 }]);
+    expect(rows2).toEqual([{ key: '1', value: 1001 + 1002 }]);
+})
--- a/bindings/javascript/sync/packages/native/promise.ts
+++ b/bindings/javascript/sync/packages/native/promise.ts
@@ -0,0 +1,104 @@
+import { DatabasePromise, DatabaseOpts, NativeDatabase } from "@tursodatabase/database-common"
+import { ProtocolIo, run, SyncOpts, RunOpts, DatabaseRowMutation, DatabaseRowStatement, DatabaseRowTransformResult } from "@tursodatabase/sync-common";
+import { Database as NativeDB, SyncEngine } from "#index";
+import { promises } from "node:fs";
+
+let NodeIO: ProtocolIo = {
+    async read(path: string): Promise<Buffer | Uint8Array | null> {
+        try {
+            return await promises.readFile(path);
+        } catch (error) {
+            if (error.code === 'ENOENT') {
+                return null;
+            }
+            throw error;
+        }
+    },
+    async write(path: string, data: Buffer | Uint8Array): Promise<void> {
+        const unix = Math.floor(Date.now() / 1000);
+        const nonce = Math.floor(Math.random() * 1000000000);
+        const tmp = `${path}.tmp.${unix}.${nonce}`;
+        await promises.writeFile(tmp, new Uint8Array(data));
+        try {
+            await promises.rename(tmp, path);
+        } catch (err) {
+            await promises.unlink(tmp);
+            throw err;
+        }
+    }
+};
+
+function memoryIO(): ProtocolIo {
+    let values = new Map();
+    return {
+        async read(path: string): Promise<Buffer | Uint8Array | null> {
+            return values.get(path);
+        },
+        async write(path: string, data: Buffer | Uint8Array): Promise<void> {
+            values.set(path, data);
+        }
+    }
+};
+class Database extends DatabasePromise {
+    runOpts: RunOpts;
+    engine: any;
+    io: ProtocolIo;
+    constructor(db: NativeDatabase, io: ProtocolIo, runOpts: RunOpts, engine: any, opts: DatabaseOpts = {}) {
+        super(db, opts)
+        this.runOpts = runOpts;
+        this.engine = engine;
+        this.io = io;
+    }
+    async sync() {
+        await run(this.runOpts, this.io, this.engine, this.engine.sync());
+    }
+    async pull() {
+        await run(this.runOpts, this.io, this.engine, this.engine.pull());
+    }
+    async push() {
+        await run(this.runOpts, this.io, this.engine, this.engine.push());
+    }
+    async checkpoint() {
+        await run(this.runOpts, this.io, this.engine, this.engine.checkpoint());
+    }
+    async stats(): Promise<{ operations: number, mainWal: number, revertWal: number, lastPullUnixTime: number, lastPushUnixTime: number | null }> {
+        return (await run(this.runOpts, this.io, this.engine, this.engine.stats()));
+    }
+    override async close(): Promise<void> {
+        this.engine.close();
+    }
+}
+
+/**
+ * Creates a new database connection asynchronously.
+ * 
+ * @param {string} path - Path to the database file.
+ * @param {Object} opts - Options for database behavior.
+ * @returns {Promise<Database>} - A promise that resolves to a Database instance.
+ */
+async function connect(opts: SyncOpts): Promise<Database> {
+    const engine = new SyncEngine({
+        path: opts.path,
+        clientName: opts.clientName,
+        tablesIgnore: opts.tablesIgnore,
+        useTransform: opts.transform != null,
+        tracing: opts.tracing,
+        protocolVersion: 1
+    });
+    const runOpts: RunOpts = {
+        url: opts.url,
+        headers: {
+            ...(opts.authToken != null && { "Authorization": `Bearer ${opts.authToken}` }),
+            ...(opts.encryptionKey != null && { "x-turso-encryption-key": opts.encryptionKey })
+        },
+        preemptionMs: 1,
+        transform: opts.transform,
+    };
+    let io = opts.path == ':memory:' ? memoryIO() : NodeIO;
+    await run(runOpts, io, engine, engine.init());
+
+    const nativeDb = engine.open();
+    return new Database(nativeDb as any, io, runOpts, engine, {});
+}
+
+export { connect, Database, DatabaseRowMutation, DatabaseRowStatement, DatabaseRowTransformResult }
--- a/bindings/javascript/sync/packages/native/tsconfig.json
+++ b/bindings/javascript/sync/packages/native/tsconfig.json
@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "skipLibCheck": true,
+    "declaration": true,
+    "declarationMap": true,
+    "module": "nodenext",
+    "target": "esnext",
+    "outDir": "dist/",
+    "lib": [
+      "es2020"
+    ],
+    "paths": {
+      "#index": [
+        "./index.d.ts"
+      ]
+    }
+  },
+  "include": [
+    "*"
+  ]
+}