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LayerZero V1 is deprecated. This page is provided as a reference for legacy integrations only. For new development, use LayerZero V2.
The LzApp Standard provides developers with a generic message passing interface to send and receive arbitrary pieces of data between contracts existing on different blockchain networks. LzApp lends access to two essential functions:
  • _lzSend: the function your application must implement to send an omnichain message
  • _lzReceive: the function to receive an omnichain message
You can dive right in with a simple code example here. Because everything on the blockchain is at its root a smart contract, LayerZero can extend existing contract standards to interoperate with the protocol and provide developers a starting point for building specific applications.

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Installation

npm install @layerzerolabs/solidity-examples

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Usage

Once installed, you can use the contracts in the library by importing them: 
import "@layerzerolabs/solidity-examples/contracts/lzApp/LzApp.sol";

contract MyLzApp is LzApp {

    constructor(address _lzEndpoint) LzApp(_lzEndpoint) {}

}
Pass in your chain specific Testnet or Mainnet Contract Address, which is all you need to start sending cross-chain messages.