> For the complete documentation index, see [llms.txt](https://docs.nomad.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nomad.xyz/the-nomad-protocol.md).

# The Nomad Protocol

- [Overview](https://docs.nomad.xyz/the-nomad-protocol/overview.md)
- [Cross-chain Messaging](https://docs.nomad.xyz/the-nomad-protocol/cross-chain-messaging.md)
- [Lifecycle of a Message](https://docs.nomad.xyz/the-nomad-protocol/cross-chain-messaging/lifecycle-of-a-message.md)
- [Verification Mechanisms](https://docs.nomad.xyz/the-nomad-protocol/verification-mechanisms.md)
- [Background on Verification](https://docs.nomad.xyz/the-nomad-protocol/verification-mechanisms/background-on-verification.md)
- [Native Verification](https://docs.nomad.xyz/the-nomad-protocol/verification-mechanisms/native-verification.md)
- [External Verification](https://docs.nomad.xyz/the-nomad-protocol/verification-mechanisms/external-verification.md)
- [Optimistic Verification](https://docs.nomad.xyz/the-nomad-protocol/verification-mechanisms/optimistic-verification.md)
- [Comparing Mechanisms](https://docs.nomad.xyz/the-nomad-protocol/verification-mechanisms/comparing-mechanisms.md)
- [Security](https://docs.nomad.xyz/the-nomad-protocol/security.md)
- [Root of Trust](https://docs.nomad.xyz/the-nomad-protocol/security/root-of-trust.md)
- [Fraud](https://docs.nomad.xyz/the-nomad-protocol/security/root-of-trust/fraud.md)
- [Optimistic Timeout Period](https://docs.nomad.xyz/the-nomad-protocol/security/root-of-trust/fraud/optimistic-timeout-period.md)
- [Fraud Recovery](https://docs.nomad.xyz/the-nomad-protocol/security/root-of-trust/fraud/fraud-recovery.md)
- [App-Governed Root of Trust](https://docs.nomad.xyz/the-nomad-protocol/security/root-of-trust/app-governed-root-of-trust.md)
- [Liveness Assumptions](https://docs.nomad.xyz/the-nomad-protocol/security/root-of-trust/liveness-assumptions.md)
- [Attack Vectors](https://docs.nomad.xyz/the-nomad-protocol/security/attack-vectors.md)
- [Key Compromise](https://docs.nomad.xyz/the-nomad-protocol/security/attack-vectors/key-compromise.md)
- [Economic Attacks](https://docs.nomad.xyz/the-nomad-protocol/security/attack-vectors/economic-attacks.md)
- [Smart Contract Bugs](https://docs.nomad.xyz/the-nomad-protocol/security/attack-vectors/smart-contract-bugs.md)
- [Long-Term Security](https://docs.nomad.xyz/the-nomad-protocol/security/long-term-security.md)
- [Permissionless Watchers](https://docs.nomad.xyz/the-nomad-protocol/security/long-term-security/permissionless-watchers.md)
- [Financial Controls](https://docs.nomad.xyz/the-nomad-protocol/security/long-term-security/financial-controls.md)
- [Cross-Domain MEV](https://docs.nomad.xyz/the-nomad-protocol/security/long-term-security/cross-domain-mev.md)
- [Smart Contracts](https://docs.nomad.xyz/the-nomad-protocol/smart-contracts.md)
- [Home](https://docs.nomad.xyz/the-nomad-protocol/smart-contracts/home.md)
- [Replica](https://docs.nomad.xyz/the-nomad-protocol/smart-contracts/replica.md)
- [XAppConnectionManager](https://docs.nomad.xyz/the-nomad-protocol/smart-contracts/xappconnectionmanager.md)
- [Off-chain Agents](https://docs.nomad.xyz/the-nomad-protocol/off-chain-agents.md)
- [Updater](https://docs.nomad.xyz/the-nomad-protocol/off-chain-agents/updater.md)
- [Watchers](https://docs.nomad.xyz/the-nomad-protocol/off-chain-agents/watchers.md)
- [Relayer](https://docs.nomad.xyz/the-nomad-protocol/off-chain-agents/relayer.md)
- [Processor](https://docs.nomad.xyz/the-nomad-protocol/off-chain-agents/processor.md)