Payment processing

Overview Toncoin Jettons

Standard contracts

Smart contract development

Introduction Acton toolchain

Tolk language

Overview Basic syntax Idioms and conventions Examples

Other languages

Overview Cookbook

Language

Comments Types Literals Operators Expressions Statements

Program declarations

Overview Functions Reserved functions Assembler functions Global variables Compiler directives Reserved words and built-ins Dictionaries

Libraries

Standard library Other libraries Changelog Known issues

TVM: TON Virtual Machine

Instructions Builders and Slices Continuations Registers Gas Initialization Exit codes Get methods

Nodes

Primitives

Account status Execution phases Transaction fees Traces Blockchain sharding Limits Config

System contracts Precompiled contracts

Whitepapers

Overview TVM TON Blockchain The Open Network Catchain consensus

FunC

FunC program declarations

The official smart contract language of TON Blockchain is Tolk. FunC is now a legacy language, with its compiler no longer maintained.

FunC pages will be moved down in the sidebar in mid-April 2026. Here is the preview of a possible future placement, right between "Blockchain foundations" and "Contribute" sections:

Preview of a possible future placement of FunC and Fift languages in the sidebar.

Preview of a possible future placement of FunC and Fift languages in the sidebar.

Learn how to migrate from FunC to Tolk.

A FunC program is a list of:

Function declarations and definitions
Global variable declarations
Compiler directives

Last updated on

Statements

Functions