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

# Contract

- [OrbitHub](https://bridge-docs.orbitchain.io/contract/orbithub.md)
- [Bridge](https://bridge-docs.orbitchain.io/contract/bridge.md)
- [Ethereum](https://bridge-docs.orbitchain.io/contract/bridge/ethereum.md)
- [BNB Chain](https://bridge-docs.orbitchain.io/contract/bridge/ethereum-1.md)
- [Klaytn](https://bridge-docs.orbitchain.io/contract/bridge/klaytn.md)
- [Heco](https://bridge-docs.orbitchain.io/contract/bridge/klaytn-1.md)
- [Polygon](https://bridge-docs.orbitchain.io/contract/bridge/klaytn-2.md)
- [Celo](https://bridge-docs.orbitchain.io/contract/bridge/klaytn-3.md)
- [ICON](https://bridge-docs.orbitchain.io/contract/bridge/icon.md)
- [XRP](https://bridge-docs.orbitchain.io/contract/bridge/xrp.md)
- [Vault (Layer 1)](https://bridge-docs.orbitchain.io/contract/vault.md): We explain how the following networks act as Vaults in the Orbit Bridge system.
- [Ethereum](https://bridge-docs.orbitchain.io/contract/vault/ethereum.md)
- [BNB Chain](https://bridge-docs.orbitchain.io/contract/vault/ethereum-1.md)
- [Klaytn](https://bridge-docs.orbitchain.io/contract/vault/klaytn.md)
- [Heco](https://bridge-docs.orbitchain.io/contract/vault/klaytn-1.md)
- [Polygon](https://bridge-docs.orbitchain.io/contract/vault/klaytn-2.md)
- [Celo](https://bridge-docs.orbitchain.io/contract/vault/klaytn-3.md)
- [XRP](https://bridge-docs.orbitchain.io/contract/vault/xrp.md)
- [Minter (Layer 2)](https://bridge-docs.orbitchain.io/contract/minter.md): We explain how the following networks act as Minters in the Orbit Bridge ecosystem.
- [Ethereum](https://bridge-docs.orbitchain.io/contract/minter/ethereum.md)
- [Avalanche](https://bridge-docs.orbitchain.io/contract/minter/klaytn.md)
- [BNB Chain](https://bridge-docs.orbitchain.io/contract/minter/klaytn-1.md)
- [Klaytn](https://bridge-docs.orbitchain.io/contract/minter/klaytn-2.md)
- [Celo](https://bridge-docs.orbitchain.io/contract/minter/klaytn-3.md)
- [Fantom](https://bridge-docs.orbitchain.io/contract/minter/klaytn-4.md)
- [Harmony](https://bridge-docs.orbitchain.io/contract/minter/klaytn-5.md)
- [Polygon](https://bridge-docs.orbitchain.io/contract/minter/klaytn-6.md)
- [Moonriver](https://bridge-docs.orbitchain.io/contract/minter/klaytn-7.md)
- [OKExChain](https://bridge-docs.orbitchain.io/contract/minter/klaytn-8.md)
- [Orbit](https://bridge-docs.orbitchain.io/contract/minter/klaytn-9.md)
- [Gnosis](https://bridge-docs.orbitchain.io/contract/minter/klaytn-10.md)
- [ICON](https://bridge-docs.orbitchain.io/contract/minter/icon.md): SCORE SmartContract in ICON
- [XRP](https://bridge-docs.orbitchain.io/contract/minter/xrp.md)
- [BridgeReceiver](https://bridge-docs.orbitchain.io/contract/bridgereceiver.md): BridgeReceiver for evm based chain ( ETH, KLAYTN, etc.. )
- [Governance](https://bridge-docs.orbitchain.io/contract/governance.md)
- [Glossary](https://bridge-docs.orbitchain.io/contract/glossary.md)