"Submarine Swaps employ hash time-locked contracts (HTLCs), which in layperson’s terms, enable two transactions (both sides of the swap) to happen simultaneously by linking them together cryptographically inside of a smart contract. Using this technology, there is no way for one exchange to occur without the other occurring at the same moment.

This is the most trustless solution that exists for moving sats between Bitcoin layers."-- Frank Corva

Trustless bridges play a crucial role in connecting Bitcoin's various layers, with Boltz emerging as a key player in this space. As a non-custodial exchange service, Boltz is transforming the way Bitcoin moves between the base chain, Lightning Network, and Liquid. The service utilizes atomic swaps and submarine swaps to facilitate efficient and seamless cross-layer transfers, eliminating the need for intermediaries. These innovations are significant for the future of Bitcoin's layered ecosystem, potentially enhancing interoperability, liquidity, and overall functionality across different Bitcoin layers. The implications of these advancements could lead to a more integrated and versatile Bitcoin network, improving user experience and expanding the cryptocurrency's utility in various applications.

Here is the original article:
BETWEEN BITCOIN LAYERS: BOLTZ BUILDS TRUSTLESS TRANSFERS
Boltz co-founder and CEO Kilian and his team have created an easy-to-use, non-custodial solution for moving bitcoin between the base chain, Lightning and Liquid.
https://bitcoinmagazine.com/business/between-bitcoin-layers-boltz-builds-trustless-transfers