Uniswap Labs developers have unveiled The Compact v1, a tool based on ERC-6909 standard smart contracts, designed to tackle cross-chain fragmentation.
Introducing The Compact 🦄
The open-source, composable smart contract system that enables seamless crosschain interoperability
Builders can now enable credible commitments within their applications, made possible with The Compact’s resource locking mechanism https://t.co/GTprw87N77
— Uniswap Labs 🦄 (@Uniswap) September 23, 2025
The solution forms a “developer-oriented common framework for creating customizable and composable systems.”
“The Compact ensures secure cross-chain settlements through a system of reusable resource locks and programmable commitments,” states the blog.
The mechanism is based on sponsor deposits: they contribute tokens to a contract, creating Resource Locks represented in ERC-6909 format. These locks remain under the sponsors’ control but can support multiple Compacts—verifiable commitments with specified conditions under which other participants can access the assets.
The architecture includes four key elements:
- allocators — prevent double-spending by controlling resource usage;
- arbiters — verify the fulfillment of commitment conditions;
- tribunal — a settlement mechanism for cross-chain transactions;
- emissaries — provide backup verification for smart wallets.
The system is intended for cross-chain exchanges in UniswapX. It is also being implemented in LI.FI and Rhinestone.
“Cross-chain applications face a key challenge: different execution environments operate asynchronously, making atomic operations impossible […]. This disrupts the fundamental guarantee of atomicity, which ensures transactions within a single network remain secure and predictable,” the developers explained.
Representatives of the leading DEX added that Compact v1 has undergone several independent security audits by OpenZeppelin and Spearbit. Full audit reports will be published soon. The project will also be included in a bug bounty program.
In August, Uniswap’s trading volume reached $143 billion, compared to $99.3 billion the previous month.
The non-custodial exchange leads its segment in daily trading volume, according to DeFi Llama.
Back in May, Uniswap’s cumulative turnover exceeded $3 trillion.