Sonic Labs: the new formal verification library for DAG-based protocols

Sonic Labs, the team behind the Sonic blockchain, has launched the new formal verification library for DAG-based consensus protocols. The goal is to provide proof tools for the security of blockchains

Sonic Labs and the security of the blockchain: the launch of the new formal verification library

Sonic Labs, the team behind the Sonic blockchain, has announced the launch of the new formal verification library, dedicated to DAG-based consensus protocols.

In practice, it is an open-source library that uses formal verification to mathematically prove the security of directed acyclic graph blockchains, including the Sonic EVM blockchain.

Thanks to the use of the TLA+ trial assistant, it is possible to simplify the process of verifying DAG-based consensus protocols, allowing developers to model and verify the protocols with minimal effort.

This is a testing tool to verify the security of blockchains. The library includes tests for important DAG-based protocols such as DAG-Rider, Cordial Miner, Bullshark, Hashgraph, and Aleph, with the Sonic consensus protocol verified as derived.

The formal verification library was presented for the first time at the NASA Formal Methods 2025 (NFM 2025) in Williamsburg, Virginia, from June 11 to 13

Sonic Labs and the rigorous mathematical approach to demonstrate the security of a protocol

The current situation of blockchain security often sees the vulnerability of consensus protocols that can also lead to catastrophic exploits. Double spending or ledger inconsistencies are an example

In general, in fact, traditional tests and verifications to ensure the security of blockchains have become insufficient

Here, in this sense, Sonic Labs has decided to take on the challenge of the moment with a strictly mathematical approach, which demonstrates that a protocol is secure in all possible scenarios, leaving no room for errors.

In this regard, Dr. Bernhard Scholz, Chief Research Officer, Sonic Labs, commented:

“In the blockchain, security failures often stem from assumptions that are not verified until it is too late. With this library, we are moving from hope to proof, providing the tools to verify, with mathematical certainty, that a protocol will behave securely under all conditions. Our goal is to make formal verification accessible to all protocol developers”.

Sonic Labs has started to implement formal verification to prove that unsafe behavior is mathematically impossible on the Sonic blockchain.

The entry of token S on Coinbase

In the last few hours, there is also talk of the entry of the Sonic (S) token on the well-known crypto-exchange Coinbase.

$S è ora disponibile su @Coinbase. pic.twitter.com/E6AIy6yusF

— Sonic Labs (@SonicLabs) 24 giugno 2025

In practice, Coinbase customers can also access the Coinbase iOS and Android app to buy, sell, convert, send, receive, or store the token S

Currently, Sonic (S) is in the 73rd position in the overall crypto ranking, with a market cap of 932 million dollars. At the time of writing, S is worth $0.32

It was mid-April 2025, when Fantom launched the latest Sonic update to revolutionize DeFi. With a capacity of over 10,000 transactions per second (TPS) and finalization times of less than 2 seconds, Sonic immediately positioned itself as one of the fastest and most scalable Layer 1 networks in the crypto landscape. With Sonic, the token S also debuted, initially pegged to Fantom’s FTM.