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TokEngine

TokEngine is a cutting-edge, open-source cross-chain token interoperability bridge that leverages the efficiency and scalability of Convex's lattice technology to enable seamless, high-speed digital asset transfers across diverse blockchain networks. Designed for flexibility, TokEngine empowers anyone to operate a server and facilitate cross-chain token exchanges for their chosen digital assets, fostering a decentralised and inclusive financial ecosystem. Released under the Apache 2.0 License, TokEngine is freely accessible for developers and organizations worldwide.

TokEngine Logo

About the project​

TokEngine is proudly supported by the Convex Foundation and funded by the EU's Next Generation Internet initiative, championing sustainable and efficient cross-chain interoperability. Developed by Convex Ecosystem Services Limited in collaboration with Werenode, TokEngine is built to drive innovation in decentralised finance and blockchain connectivity. TokEngine is an open source product supported by the Convex Foundation

Key Functionality​

  • Deposit and Virtual Balances: Accept deposits and convert them into "Virtual Balances" for cross-chain use.
  • Cross-Chain Payouts: Redeem "Virtual Balances" as equivalent tokens on any supported distributed ledger technology (DLT).
  • End-to-End Swaps: Execute seamless cross-chain token swaps.
  • Wrapped Tokens: Support for wrapped token functionality.
  • Audit Logging: Optional logging to a Kafka queue for transparency and tracking.
  • CAIP Compatibility: Aligns with Chain Agnostic Improvement Protocols (CAIPs) for standardised interoperability.

Supported DLTs​

TokEngine's plugin adapter system enables integration with various DLT networks, offering operators unparalleled flexibility.

Convex​

With an embedded Convex Peer, TokEngine ensures ultra-low-latency communication with Convex networks, achieving end-to-end transactions in under 300ms. It can connect to existing Convex networks or operate in standalone mode.

TokEngine supports the following on Convex based networks e.g. Protonet:

  • Convex coins (native token)
  • CAD029 tokens (i.e. compatible with the convex.fungible library)

EVM​

TokEngine integrates with EVM-compatible chains using the Web3j library, with key storage in standard EVM wallet files.

On any EVM-compatible chain, TokEngine supports

  • ETH (native token)
  • ERC20 token
  • ERC777 tokens (coming coon)

Tezos (Coming Soon)​

On Tezos TokEngine supports:

  • tez (native token)
  • FA1.2
  • FA2
  • FA2.1

Community and discussion​

Join the TokEngine community to contribute, collaborate, or stay updated:

  • Explore the code and get involved with OSS development at the GitHub repository. Open source developers wishing to get involved with TokEngine should visit the
  • Engage in discussions on the Convex Community Discord.