# OAppAuth

- [Contents](/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/contents.md)
- [OAppAuth](/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/oappauth.md)
- [OAppAuthCore](/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/oappauthcore.md)
- [OAppAuthReceiver](/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/oappauthreceiver.md)
- [OAppAuthSender](/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/oappauthsender.md)