TokenBridge provides data and token transfer capabilities across EVM chains

The TokenBridge allows users to transfer data (e.g. digital asset ownership information) between two chains in the Ethereum ecosystem. Cross-chain bridges provide fast and secure connections between blockchains, creating scalability and connection - interoperability - between Ethereum networks.

TokenBridge docs are organized in the sidebar menu.

  1. About TokenBridge: General info and details about the implementation, including a link to the monorepo at https://github.com/poanetwork/tokenbridge

  2. Arbitrary Message Bridge (AMB): A bridge designed for universal cross-chain data transfer. Includes parameters, how-tos and examples.

  3. Bridge-by-bridge details. Each section includes technical and connection details as well as links to examples and use-cases.

    1. xDai Bridge: ERC20-to-Native TokenBridge implementation on the Gnosis Chain.

    2. ETH-xDai AMB: AMB between Ethereum and GC, includes the Multi-token bridge extension.

    3. Rinkeby-xDai AMB: AMB between Rinkeby testnet and xDai. Used for xMOON projects.

    4. Kovan-Sokol AMB: Useful for testing applications and extensions.

    5. ETH-POA AMB: AMB between Ethereum mainnet and POA Network.

    6. ETH-ETC AMB: AMB between Ethereum Mainnet and Ethereum Classic. Used to create WETC on Ethereum.

    7. ETH-qDai AMB: Bridge between the experimental Quorum chain and the Ethereum Mainnet.

    8. ETH-BNC Bridge: combines the TokenBridge + a Threshold Signature Scheme approach to bridge between Ethereum and Binance Chain.

Production asset-transfer bridges

The following bridges are fully-functional in production environments:

  • POA Bridge (POA network to Eth Mainnet):The POA Bridge was the first EVM cross-chain production bridge in existence.

  • xDai Bridge (Eth Mainnet to Gnosis Chain): The Gnosis chain uses the ERC20-to-Native TokenBridge functionality to provide fast, inexpensive and stable transactions.

  • Eth Classic Bridge (Eth Classic to Eth Mainnet): The Eth Classic Bridge connects ETC to ETH, where ETC is available as WETC.

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