The TON Core team launched actonscan.com, an explorer designed for smart-contract and dApp developers, not for regular users. It is the first tool built around the new ABI in Tolk — a machine-readable description of contract messages, get methods, and errors.
TON lacked such a standard for a long time, with interfaces described by TL-B schemas in various ad-hoc ways, leading to the perpetual "unrecognized contract" labels in explorers. Machine-readable ABI recently became available in Tolk, and Actonscan maintains an open catalog of these descriptions — over 330 contracts at launch — where any developer can add their own via a pull request, even if the contract was written in FunC.
With ABI, messages are displayed as typed structures instead of raw bytes, get methods can be called directly from the contract page, and you can compose a message and emulate it in the browser right there. Furthermore, it offers transaction execution breakdown by shards, storage changes after each step, and network configuration at any block; a faucet is available for the testnet.
Actonscan is part of Acton Studio, and the team promises two more releases this week: in-browser debugging of Tolk contracts by source code, verified source code on the contract page, and support for any network, including local ones.
