ZEIPs 0x Improvement Proposals (ZEIPs) describe standards and protocol specifications for the 0x protocol. Accepted ZEIPs Title Number Version Included Initial Staking Parameters 61 3.0 Mixed assets in "market" operations 59 3.0 marketBuy/SellOrdersFillOrKill 50 3.0 ERC20BridgeProxy 47 3.0 Protocol Fees 42 3.0 Batch Order Matching 41 3.0 New Order Matching Strategy 40 3.0 Allow 0x transactions to be cancelled (or expired) 37 3.0 Allow batch 0x transaction execution 36 3.0 Permissive Order Cancellations 35 3.0 0x transaction developer experience improvements 34 3.0 New/Consolidated Signature Type(s) and Behavior 33 3.0 Rich Reverts 32 3.0 Stake-based Liquidity Incentives 31 3.0 Arbitrary fee tokens 28 3.0 Allow for mass order cancellations based on salt value 20 2.0 Replace isTransferable with fillOrder variant that uses delegatecall 19 2.0 Allow taker to be different from sender with optional taker signature 18 2.0 Use order schema hash in signature verification for EIP712 compatibility 17 2.0 Do not double check signatures of previously filled/cancelled orders 15 2.0 On-chain order generation by smart contracts 7 2.0 Atomic order matching 2 2.0 Off-chain order generation by smart contracts 1 2.0
