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Ton4J

Ton4J is an open-source Java SDK of libraries and wrappers for interacting with The Open Network (TON), including blockchain access, wallet and account operations, data handling, and smart-contract workflows.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Ton4J — OpenViST project profile in Developer Tools.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use Ton4J when building TON functionality into Java software and when you need to select specific modules for blockchain access, data handling, wallets, or smart-contract work.

Who it is for

  • Java developers integrating TON into applications or backend services.
  • Developers building or inspecting TON smart contracts and related workflows.

Documented uses

  • Connect Java code to TON through Tonlib, an ADNL lite-client, or TonCenter API clients.
  • Create and parse wallet addresses, generate deterministic keys, and work with accounts, transactions, messages, and balances.
  • Construct and parse Bag of Cells and serialize or deserialize TON data structures.
  • Create, deploy, and interact with smart contracts, including workflows involving NFTs and jettons.
  • Export TON database data through the exporter module.
Before you choose

Requirements & limits

Requires Java 11 or later. The README documents Maven Central and JitPack dependency options. Ton4J is licensed under GPL-3.0.

  • Choose among Tonlib shared-library, ADNL lite-client, and TonCenter API connection routes according to the integration you need.
  • Tonlib, emulator, Fift, Func, and Tolk wrappers can require external libraries or precompiled binaries.
  • The repository is modular, and its README says submodules can be used individually.
  • The README recommends considering an API key for production use with TonCenter.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Add the ton4j smartcontract module with Maven

Declare the ton4j smartcontract module as a dependency in a Java project.

Before you start

  • Java 11 or later
  • A Maven project

Steps

  1. Add the dependency with groupId org.ton.ton4j, artifactId smartcontract, and version 2.2.0 to the project’s Maven configuration.

  2. Resolve the dependency through Maven Central.

Expected outcome

The project configuration declares ton4j’s smartcontract module as a dependency.

Guide limitations

  • This guide covers dependency configuration only; it does not cover connecting to TON or executing blockchain operations.
  • The README also documents a JitPack option, but this recipe uses the Maven Central dependency.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
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Sources checked
11 October 2026
Original website title
ton-blockchain/ton4j · Official homepage title · retained in its source language
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