Odaily Planet Daily News StarkWare used its new STARK validator in the Bitcoin test environment Signet network and used OP_CAT technology, a proposed upgrade for Bitcoin that aims to bring Ethereum-style "smart contract" programmability. Although OP_CAT has no shortage of supporters, it is still in the early stages of gaining the consensus needed to be incorporated into the Bitcoin core software. "StarkWare publicly supports the approval of this proposal because it will bring obvious benefits to the Bitcoin community and the broader blockchain ecosystem," the company said in a press release.