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.
Acton
Blazingly fast | for TON smart contract development
$
curl -LsSf https://ton.org/acton/install.sh | shFrom zero to testnet
2-minute walkthrough
Tiny Acton workshop: create a project, launch tests, guide through essential features, airdrop TONs to your wallet, and deploy a contract to TON Blockchain.
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I will record this video the next week
Essential features
A unified toolchain for TON
Not another small utility. Not another isolated CLI.
A full development environment built as one coherent system — around Tolk.
dApp-ready contracts
Generate TypeScript wrappers for frontend and end-to-end testing.
TON Connect and AppKit 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, Helix, Zed, (Neo)Vim, 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
Several principle features that allow dive deep into contract development.
Focused on security, error prevention, and gas optimization.
Mutation testing
Stress the suite by flipping operators, values, and branches to reveal weak checks and untested invariants.
Coverage reports
Track line and branch coverage, inspect colorful reports in Test UI, and export LCOV for external tooling.
Fork testing
Run tests against real mainnet state by automatically pulling deployed accounts into the local emulator.
Fuzz testing
Re-run parameterized tests with generated inputs, assumptions, bounds, and reproducible seeds until the first failure.
Gas profiling
Snapshot transaction-chain gas usage, compare against baselines, and catch fee regressions before they ship.
Scripting
Use Tolk for local experiments, deployment flows, and real blockchain interaction with familiar testing primitives.
CI integration
Wire Acton into GitHub Actions or GitLab CI for builds, tests, checks, coverage, and secret-backed jobs.
Masterchain libraries
Publish reusable code to the Masterchain, track storage runway, top it up, and refer to it in tests and scripts.
FunC migration
FunC to Tolk in one click
Convert your existing FunC project to Tolk with a single command,
and then iteratively refactor it keeping green tests.
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todo think about this block, try to skill LLMs
Ready to build?
$
curl -LsSf https://ton.org/acton/install.sh | sh