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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. 1.
    About TokenBridge: General info and details about the implementation, including a link to the monorepo at
  2. 2.
    Arbitrary Message Bridge (AMB): A bridge designed for universal cross-chain data transfer. Includes parameters, how-tos and examples.
  3. 3.
    Bridge-by-bridge details. Each section includes technical and connection details as well as links to examples and use-cases.
    1. 1.
      xDai Bridge: ERC20-to-Native TokenBridge implementation on the Gnosis Chain.
    2. 2.
      ETH-xDai AMB: AMB between Ethereum and GC, includes the Multi-token bridge extension.
    3. 3.
      Rinkeby-xDai AMB: AMB between Rinkeby testnet and xDai. Used for xMOON projects.
    4. 4.
      Kovan-Sokol AMB: Useful for testing applications and extensions.
    5. 5.
      ETH-POA AMB: AMB between Ethereum mainnet and POA Network.
    6. 6.
      ETH-ETC AMB: AMB between Ethereum Mainnet and Ethereum Classic. Used to create WETC on Ethereum.
    7. 7.
      ETH-qDai AMB: Bridge between the experimental Quorum chain and the Ethereum Mainnet.
    8. 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.
POA Bridge UI