Tact Language

Developed by TON Studio, powered by the community.

Features • Installation • Community • Troubleshooting

This extension for VSCode-based editors provides support for the Tact programming language. Tact is a next-generation programming language for building secure, scalable, and maintainable smart contracts on TON blockchain.

In addition to Tact, the extension provides support for Fift assembly, TL-B, and TON Bag-of-Cells (BoC) files.

Features

• Semantic syntax highlighting
• Code completion with auto import, postfix completion, snippets, imports completion
• Go to definition, implementation, type definition
• Find all references, workspace symbol search, symbol renaming
• Advanced navigation like type-based search and code lenses that let you jump to where each message is sent and where it’s received
• Automatic import updates when renaming and moving files
• Types and documentation on hover
• TL-B definition for messages, structs and contracts on hover
• Beginner documentation for all keywords on hover
• Inlay hints for types, parameter names, receiver opcodes and more
• On-the-fly inspections with quick fixes
• Signature help inside calls, initOf and struct initialization
• Lenses with implementation/reference counts
• Gas estimates for assembly functions
• Build and test projects based on Blueprint and Tact template
• Integration with Tact compiler and Misti static analyzer
• Flexible [toolchain management]
• Formatting
• Fift Assembly:
  • Basic and semantic syntax highlighting
  • Go-to definitions
  • Inlay hints with gas consumption for instructions
  • Hover documentation for instructions
• TL-B:
  • Basic and semantic syntax highlighting
  • Go-to definitions
  • Completion for fields, parameters, and types
  • Go-to references for types
  • Document symbols with all declarations
• TON Bag-of-Cells (BoC):
  • Automatic BoC disassembly with syntax highlighting
  • Automatic updates on BoC changes

Quick start

The easiest way to get started with Tact is in VS Code or editors based on it:

1. Install the Tact language extension in VS Code or in VS Code-based editors
2. Reload VS Code
3. That's it!

Installation

VS Code / VSCodium / Cursor / Windsurf

1. Get the latest .vsix file from releases from VS Code marketplace or from Open VSX Registry
2. In VS Code:
   • Open the Command Palette (Ctrl+Shift+P or Cmd+Shift+P)
   • Type "Install from VSIX"
   • Select the downloaded .vsix file
   • Reload VS Code

If you use Cursor, Windsurf, or any other AI-powered editor, you can feed it the following content, specifically created for LLMs:

• https://docs.tact-lang.org/llms-full.txt — for full context
• https://docs.tact-lang.org/llms-small.txt — for smaller context windows

Community

• @tactlang on Telegram - Main community chat and discussion group.
• @tactlang_ru on Telegram (Russian)
• @tact_kitchen on Telegram - Channel with updates from the team.
• @tact_language on X/Twitter
• tact-lang organization on GitHub
• @ton_studio on Telegram
• @thetonstudio on X/Twitter

Troubleshooting

See TROUBLESHOOTING.md.

License

MIT