The following smart contract is an implementation of an endpoint for LayerZero messaging protocol. It allows for sending and receiving messages between different chains and user applications. The contract manages different versions of messaging libraries and allows for setting configurations for each user application. It also includes non-reentrancy modifiers and functions for estimating fees and checking payload storage.

The following smart contract is a NonceContract that keeps track of nonces for outbound transactions on different chains. It imports an interface called ILayerZeroEndpoint and has a constructor that sets the endpoint address. The increment function increments the nonce for a specific chain and path and returns the new value. It requires that the sender is a valid sendlibrary.

This contract is a proxy and the implementation details are not yet known.

Explore the source code, ABI, and bytecode for the UltraLightNodeV2 smart contract.