TON documentation

TON is a blockchain platform designed for scalable smart contracts, applications, and payments at consumer scale.

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Recent changes

Notable updates to the TON documentation. Jump to a date below.

May 11, 2026

TON Connect

SDK v4.0.0 — switched to a JSON-RPC based bridge protocol; legacy Bridge v1 endpoints removed.
New events on the wallet object: connected, disconnected, transactionSigned.
Clearer error messages for user-rejected transactions and expired sessions.

AppKit

v2.1.0 — added useStaking hook for liquid staking flows.
Breaking: useToncoin is deprecated in favor of useBalance; it will be removed in v3.0.

May 8, 2026

TON Pay

Webhook events for jetton payments are now generally available.
New endpoint POST /payments/refund for issuing partial and full refunds.

WalletKit

iOS SDK v1.4.0 — TonProof support, new transaction history methods, faster jetton balance reads.

April 30, 2026

Smart contracts

Wallet v5 R2 contract released with batch transfer fee optimizations.
Acton toolchain 0.9 — new acton verify subcommand for source verification.

Tolk language

v1.4 — try/catch for exit-code handling, new cell.refs accessor, improved error spans.

April 24, 2026

TON Center

API v3.5 — added /blockchain/account/state endpoint for full state retrieval.
Authenticated rate limit raised to 100 req/s.

April 23, 2026

Nodes

C++ node 2.0.0 — asynchronous masterchain block fetching cuts initial sync time by ~30%.
Rust node 0.7 — initial collator support behind a feature flag.

April 17, 2026

Telegram Mini Apps

Telegram UI library v3.2 — new NavigationStack component for hierarchical navigation.
Wallet selection deep linking via tg://wallet/connect is now available across all official TON wallets.