Sei Network (SEI), a layer 1 blockchain with a built-in central limit order book, is coming to BitMEX, via our new Tether-margined linear futures listing – SEIUSDTQ23. About the SEI Token and NetworkSei Network (SEI) is a layer one blockchain, optimised for trading applications across DeFi, NFT, and gaming. SEI Linear Futures Contract SpecsSEIUSDTQ23 is a linear futures contract, margined in USDT (ERC-20). It works similarly to a regular futures contract, but with some key differences (as detailed below). SEI is coming to BitMEX 10 August 2023 08:00 UTC, via our new Tether-margined linear futures listing – SEIUSDTQ23.