What is the Coming BitVMX Upgrade for Rootstock?
BitVMX represents a major enhancement to Bitcoin’s smart contract capabilities by enabling general-purpose computation on its base layer without requiring changes to the consensus protocol. Built as an evolution of the BitVM concept, BitVMX introduces a virtual CPU model capable of executing and verifying complex programmes, such as zero-knowledge proofs, using an optimistic verification method. This model assumes computations are correct unless challenged, significantly reducing on-chain burden. Key innovations include the use of hash chains to verify execution traces and message-linking with one-time digital signatures, improving efficiency and enabling secure state progression across transactions. With Rootstock’s upcoming SDKs, developers will be able to build layer-2 applications such as rollups, bridges, and oracles directly on Bitcoin. BitVMX opens a path for more expressive smart contract functionality, bringing programmability to Bitcoin in a scalable and secure manner.
