Solana Endpoint V1 Support

At the protocol level, Endpoint V2 is backwards compatible with Endpoint V1. This means, general message passing is supported out of the box between Endpoint V1 and Endpoint V2.

At the application level, customizations would be needed to support pathways between Endpoint V1 and Endpoint V2.

For example, to support OFT transfers between OFT deployments on Endpoint V1 and Solana (which is built on top of Endpoint V2), we have developed the Solana OFT202 Program. Note that Solana OFT202 is only compatible with Endpoint V1 OFT V2's. You can read more on this here.