Essential features
The on-chain workflow reimagined
A full development environment built as one coherent system
Native Tolk Tests
Use Tolk itself for testing. Unit tests, transaction flows, and cross‑contract interaction — without switching languages.
50x faster than TypeScript + JS sandbox.
dApp-ready contracts
Generate TypeScript wrappers for frontend and end‑to‑end testing.
TON Connect and React as the UI — Tolk and TON Blockchain as the backend.
Friendly for AI agents
Skills and manuals available out of the box. Acton is a modern CLI tool that becomes an agent's runtime.
Built for humans — perfect for AI.
Debugger, done right
Test failed with exit code 9? Stop exactly at the exception, inspect the call stack, local variables, lazy fields, and more.
Works for fully‑optimized production contracts, in all IDEs.
Faucet and deployment
Not only develop, but deploy, verify, and configure your contracts. Acton manages wallets and faucet top‑ups on testnet.
Arbitrary on‑chain scripts — just using Tolk.
IDE integration
Linter and formatter to keep code style consistent. All rules are configurable.
VS Code, JetBrains, Cursor, Zed, and other LSP‑based editors.
Test UI: visualize traces
Inspect transaction trees, messages, fees, storage changes — for every test, in a clean dev‑oriented UI.
Raw binary data decoded based on Tolk ABI.
Extra depth
More than the happy path
Deep dive into security, error prevention, and gas optimization
Suite strength
Mutation testing
Stress the suite by flipping operators, values, and branches to reveal weak checks and untested invariants.
Read in docs
Reports
Coverage reports
Track line and branch coverage, inspect colorful reports in Test UI, and export LCOV for external tooling.
Read in docs
Mainnet state
Fork testing
Run tests against real mainnet state by automatically pulling deployed accounts into the local emulator.
Read in docs
Fee regressions
Gas profiling
Snapshot transaction-chain gas usage, compare against baselines, and catch fee regressions before they ship.
Read in docs
Generated inputs
Fuzz testing
Re-run parameterized tests with generated inputs, assumptions, bounds, and reproducible seeds until the first failure.
Read in docs
Automation
Scripting
Use Tolk for local experiments, deployment flows, and real blockchain interaction with familiar testing primitives.
Read in docs
Pipelines
CI integration
Wire Acton into GitHub Actions or GitLab CI for builds, tests, checks, coverage, and secret-backed jobs.
Read in docs
Reusable code
Masterchain libraries
Publish reusable code to the Masterchain, track storage runway, top it up, and refer to it in tests and scripts.
Read in docs
Migration path
Migrate FunC contracts to Tolk
Give an agent your existing FunC + Blueprint project, and it will handle the migration end-to-end.
Not only contracts are converted, but also TypeScript tests become native and fast.
Available via func2tolk skill for Codex/Claude.
Contracts become idiomatic Tolk
Fast native code instead of TypeScript
Gas consumption goes down
Continue developing with green tests
Start building
Ready to build?
Install Acton and start from the docs
curl -LsSf https://github.com/ton-blockchain/acton/releases/latest/download/acton-installer.sh | sh