Validator/consensus-style bridging—wherein Bitcoin transactions are executed on Layer 1 by validators coordinating to reconfigure a key quorum when a smart contract proves valid on Layer 2— maybe be "the best option we have" for programmable Bitcoin (DeFi) says @BitcoinLayers CEO @januszg_ 

Strong examples of this style of bridge include the Internet Computer Protocol's CKBTC (@dfinity) and ARCH Network @ArchNtwrk (still in TestNet but coming up hot...)

🚄 BITCOIN RAILS SHARES MORE ARCH NETWORK DEETS TOMORROW... STAY TUNED.