UniswapX 研究报告：下一代 DEX 的未来？全景式拆解 Uniswap 系列发展链路与「X」的创新挑战与机遇

@俊俊： 1、https://blog.uniswap.org/uniswap-v2#path-to-sustainability，目前看他是预设，当前并未启动（之前发起过治理投票但是没有通过）
2、我主要是通过看链上合约的形式在研究，合约只是验证用户的价格是不是按照荷拍衰减公式符合要求。至于 filler 是通过拆分订单，从其他 pool 或者多重 pool 组合的方式来构成满足用户所需的 token 数，这点无要求。

2.1、所以，我理解其中 offchain liquidity 是链下的流动性，目前看这个合约没有写到如何验证证明，以及白皮书也没有说链上如何生成证明（与跨链不同，跨链会有目标链上信息提供证明），所以大概率是指用户私有资金（依旧在链上的，只是不在 LP 里）来撮合此订单。
2.2、提交的是订单结构体，其中有多个信息，源码中有个样例，

/// @dev generic order information
/// should be included as the first field in any concrete order types
struct OrderInfo {
  // The address of the reactor that this order is targeting
  // Note that this must be included in every order so the swapper
  // signature commits to the specific reactor that they trust to fill their order properly
  IReactor reactor;
  // The address of the user which created the order
  // Note that this must be included so that order hashes are unique by swapper
  address swapper;
  // The nonce of the order, allowing for signature replay protection and cancellation
  uint256 nonce;
  // The timestamp after which this order is no longer valid
  uint256 deadline;
  // Custom validation contract
  IValidationCallback additionalValidationContract;
  // Encoded validation params for additionalValidationContract
  bytes additionalValidationData;
}