Read more
Since the Loop Beta that we released in February we have also been working on some changes for Loop In. With this multi-path payments release we now have the ability to use multiple channels together to translate on-chain funds to refill your off-chain channels. And we have also added the ability to specify your preferred on-chain fee for Loop In to maximize the cost efficiency of getting your on-chain funds into Lightning.
Using multiple channels for Loop payments is an ideal use-case for the multi-path payments technology. Rebalance operations to move off-chain funds from ten channels onto the chain could previously have required at least ten separate on-chain transactions with Loop Outs or channel closes. With multi-path payments support, these same ten channel rebalances can now be achieved in one on-chain Loop Out operation.
Source ---> https://lightning.engineering/posts/2020-05-13-loop-mpp/