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