1inch Limit Order Protocol Smart Contract

Version warning

The master branch contains the latest work-in-progress version of limit orders. It hasn't been audited and may contain severe security issues or may not work at all.

Please, use the commit tagged v2 (here) to get the latest production version that has passed through a series of security audits.

About

You can find general overview and docs on 1inch limit orders protocol here.

This repository contains a smart contract for EVM based blockchains (Ethereum, Binance Smart Chain, etc.), this contract is core part of 1inch limit order protocol.

Contract allows users to place limit orders, that later could be filled on-chain. Limit order itself is a data structure created off-chain and signed according to EIP-712.

Key features of the protocol is extreme flexibility and high gas efficiency that achieved by using following order types.

Limit Order

Extremely flexible limit order, can be configured with:

Order execution predicate.
- Typical usage is checking that certain time stamp or block number. With this you can set certain expiration time.
- You can specify construct any predicate that you want, for example check that certain price is higher than oracle price, to implement stop loss or take profit strategies
Helper function for asset price evaluation.
- Function that will allow to extract assets price from arbitrary on-chain source
Callback, for to notify maker on order execution.