> For the complete documentation index, see [llms.txt](https://docs.nucleusearn.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base.md).

# base

- [Boring Vault](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/boring-vault.md)
- [BoringVault](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/boring-vault/boringvault.md)
- [Decoders and Sanitizers](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/decoders-and-sanitizers.md)
- [Contents](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/decoders-and-sanitizers/contents.md)
- [IonPoolDecoderAndSanitizer](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/decoders-and-sanitizers/ionpooldecoderandsanitizer.md)
- [Roles](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles.md)
- [Contents](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/contents.md)
- [Cross Chain](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain.md)
- [Cross Chain OP Teller With Multi Asset Support](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/cross-chain-op-teller-with-multi-asset-support.md)
- [CrossChainOPTellerWithMultiAssetSupport](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/cross-chain-op-teller-with-multi-asset-support/crosschainoptellerwithmultiassetsupport.md)
- [ICrossDomainMessenger](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/cross-chain-op-teller-with-multi-asset-support/icrossdomainmessenger.md)
- [Cross Chain Teller Base](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/cross-chain-teller-base.md)
- [BridgeData](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/cross-chain-teller-base/bridgedata.md)
- [CrossChainTellerBase](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/cross-chain-teller-base/crosschaintellerbase.md)
- [MultiChainLayerZeroTellerWithMultiAssetSupport](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multichainlayerzerotellerwithmultiassetsupport.md)
- [Multi Chain Teller Base](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multi-chain-teller-base.md)
- [Chain](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multi-chain-teller-base/chain.md)
- [MultiChainTellerBase](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multi-chain-teller-base/multichaintellerbase.md)
- [MultiChainTellerBase\_GasLimitExceeded](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multi-chain-teller-base/multichaintellerbase_gaslimitexceeded.md)
- [MultiChainTellerBase\_GasTooLow](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multi-chain-teller-base/multichaintellerbase_gastoolow.md)
- [MultiChainTellerBase\_MessagesNotAllowedFrom](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multi-chain-teller-base/multichaintellerbase_messagesnotallowedfrom.md)
- [MultiChainTellerBase\_MessagesNotAllowedFromSender](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multi-chain-teller-base/multichaintellerbase_messagesnotallowedfromsender.md)
- [MultiChainTellerBase\_MessagesNotAllowedTo](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multi-chain-teller-base/multichaintellerbase_messagesnotallowedto.md)
- [MultiChainTellerBase\_ZeroMessageGasLimit](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/multi-chain-teller-base/multichaintellerbase_zeromessagegaslimit.md)
- [OAppAuth](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth.md)
- [Contents](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/contents.md)
- [OAppAuth](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/oappauth.md)
- [OAppAuthCore](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/oappauthcore.md)
- [OAppAuthReceiver](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/oappauthreceiver.md)
- [OAppAuthSender](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/oappauth/oappauthsender.md)
- [AccountantWithRateProviders](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/accountantwithrateproviders.md)
- [ManagerWithMerkleVerification](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/managerwithmerkleverification.md)
- [TellerWithMultiAssetSupport](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/tellerwithmultiassetsupport.md)