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This section explains how Agglayer works — from the high-level network model to the cryptographic proof systems that enforce security guarantees across connected chains. The concepts build on each other. Understanding the Unified Bridge explains how assets and messages move between chains. The Pessimistic Proof explains how Agglayer prevents a compromised chain from draining funds beyond its own deposits. The State Transition Proof explains how individual chain operations are validated before cross-chain proofs are applied. AggKit explains the synchronization components that connect a chain to Agglayer.

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Explore the concepts

What is Agglayer?

The blockchain fragmentation problem and how Agglayer creates a unified interoperability solution.

Architecture

How the Agglayer node, Pessimistic Proof, Unified Bridge, and State Transition Proof work together.

Unified Bridge

Gateway 1: How assets and messages move between chains using Merkle tree structures, the Global Exit Root, and cryptographic claim verification.

Pessimistic Proof

Gateway 2: The financial firewall that prevents compromised chains from draining more funds than they have deposited.

State Transition Proof

Gateway 3: The dual proof system that validates both internal chain operations and cross-chain transfers before settlement.

AggKit

The modular synchronization toolkit that connects a chain to Agglayer. Covers component roles, data flow, and the v0.3.5 multi-party security model.