BITCOIN DEVELOPER BURAK UNVEILS “CUBE” BTC LAYER 2, CALLS IT THE “HOLY GRAIL”
Burak, known for highlighting flaws in Lightning and later creating the Layer 2 called Ark, unveils a new project called Cube.
Cube is a Bitcoin-native execution layer that combines Ark-style unilateral exits, BitVM dispute resolution, and a programmable virtual machine.
The ideas is to bring fully trustless smart contract execution to Bitcoin without bridges, federations, external validators, protocol changes, or custodial risk.
According to the project, users retain unilateral control of their funds at all times through Bitcoin-enforced exit mechanisms, while smart contracts execute optimistically off-chain and settle back to Bitcoin when necessary.
Cube’s architecture combines Ark-style timeout trees for ownership guarantees with BitVM-style challenge mechanisms for computation verification, creating what Burak calls a Zero-Knowledge Time-Locked Contract (ZKTLC).
If it works as designed, Cube would enable generalized programmability without sacrificing self-custody, trustlessness, or Bitcoin’s security model.