Whitepaper and Research

The Fusion whitepaper is the primary technical reference for the protocol's design, trust model, and settlement mechanics.

Read the whitepaper

Fusion Protocol Whitepaper (PDF)

It covers:

1. the intent, solver, and HTLC settlement model
2. the trust boundary of the coordinator and where its authority ends
3. proof system design and route-specific proof requirements
4. cross-family route handling across EVM and non-EVM chain families
5. timelock policy, refund reasoning, and atomic settlement guarantees

Companion documentation

The docs in this site complement the whitepaper with implementation-facing detail:

• What Is Fusion? — the conceptual model in plain language
• How Fusion Works — the full settlement lifecycle with sequence diagram
• Standard vs Shielded Routes — privacy modes and where preimages appear
• Atomic Settlement Guarantee — what the guarantee covers and what it does not
• Security Model, Trust Assumptions, and Threat Model — the security posture in detail

Public writing

• Security By Design In Cross-Chain Infrastructure — broader framing of local failure, bridge risk, and route-level containment

Diligence reading

If you are evaluating Fusion for integration, partnership, or research, read in this order:

1. Fusion Protocol Whitepaper (PDF) — the full design
2. How Fusion Works — the implementation-side view of the same flow
3. Supported Chains Overview — current chain and route coverage
4. Security Model, Trust Assumptions, and Threat Model — the security boundary in three layers

Together they cover the architecture, current support boundaries, and security posture you need for a real evaluation.