LayerZero
To connect two networks you can create a LayerZero connection through the platform. You can simply select any networks that are currently running in your account or choose common public testnets. For public testnets, you will need to specify your own RPC and private key of a funded account.
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The connection is currently only one-way from Chain A to Chain B. If you need bi-directional communication, please create two LayerZero connections.
Once the connection is created, you will see the respective Executor and DVN addresses which you can use to configure your OAPP. Please follow the steps here.