Version: V2.2

Introduction

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V2.2 adds Hooks and new Router and Quoter support. See Key Changes for details.

Liquidity Book is a novel, highly-capital efficient Automated Market Maker (AMM) protocol. Its features include:

Zero Slippage: Traders can swap tokens with zero slippage within bins.
Surge Pricing: Liquidity Providers earn additional dynamic fees during high market volatility.
High Capital Efficiency: Liquidity Book can support high volume trading with low liquidity requirements.
Flexible Liquidity: Liquidity Providers can build flexible liquidity distributions according to their strategy.

Both Liquidity Book and Uniswap V3 are concentrated liquidity AMMs with some subtle differences:

Price ranges are discretized into bins instead of ticks
Bins use constant sum invariant instead of constant product
Bin steps (or tick sizes) can be more than 1 basis point
Liquidity is aggregated vertically instead of horizontally
Liquidity positions are fungible
Liquidity positions are not restricted to uniform distribution across its price range; they can be distributed in any shape desired
Swap fees have fixed + variable pricing, which allows the AMM to charge more fees when the market experiences high volatility.