Major Development Upgrade for a Multistack Future: Pessimistic Proofs Live on Agglayer Mainnet

Agglayer has activated pessimistic proofs on its mainnet—an essential upgrade enabling seamless and secure asset transfers across chains with different security models. This marks a shift from a CDK-only environment to a broader stack-agnostic framework, giving Agglayer the flexibility to unify diverse blockchains under a single cross-chain transaction system while preventing misuse or over-withdrawals. It’s a critical move toward robust, scalable multichain interoperability.

Key Ideas

Pessimistic Proofs as Risk Control: The system assumes the worst-case scenario—only allowing asset withdrawals if deposits exist—eliminating trust assumptions across chains and maintaining security regardless of chain consensus models.
True Stack-Agnostic Compatibility: Agglayer can now safely support chains that weren’t built with Polygon CDK, dramatically expanding its reach and utility in the broader Web3 ecosystem.

For developers, this unlocks multichain composability without requiring uniform architecture. They now can build adapters that interface diverse chains with Agglayer’s bridge, making applications asset-portable across ecosystems. Transaction logic can be secured without relying on optimistic assumptions or trusted third parties, reducing integration risk and time-to-market.