# What is XPort?

XPort is Wanchain’s cross-chain message passing protocol. It is composed of two basic elements: a set of rudimentary smart contracts and a robust off-chain relayer. The smart contracts detect messages and arbitrary data on a source chain and repeat it on a destination chain in the correct format. These messages and data can then be fed into 3rd party smart contracts to seamlessly execute on-chain logic and create novel cross-chain applications. The off-chain relayer is the Wanchain Bridge Node Group.

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