Star
Market Maker Hook 旨在在 Aggregator Hook 的基础上拓展一个实用案例：使用一个 MatchEngine 维护做市商们提供的 orderbook，当用户发起交易时，使用 Aggregator Hook 的技术填充流动性，使得用户能直接使用 orderbook 的报价。这种设计也使得做市商无缝接入 Uniswap V4 生态成为可能。
Aggregator // Order Limit // Tick Mapping
Quote
$ Query the best price for a swap...
> Searching liqudity:
> Comparing prices:
> Best price found:
> How to fill liquidity in Uniswap Tick from third party quote?
Mapping LP positions from various DEXs to Uniswap V4 ticks, ensuring precise alignment and optimal pricing for seamless cross-platform liquidity provision.
uint160 sqrtPriceX96 = TickMath.getSqrtRatioAtTick(curTick);
if(zeroForOne) {
uint256 tmp1 = fromAmount * uint256(sqrtPriceX96) / Q96 *uint256(sqrtPriceX96) / Q96- toAmount;
uint256 tmp2 = fromAmount * uint256(sqrtPriceX96) * toAmount / Q96;
liquidity = uint128(tmp2 / tmp1);
} else {
uint256 tmp1 = fromAmount - toAmount * uint256(sqrtPriceX96) / Q96 * uint256(sqrtPriceX96) / Q96;
uint256 tmp2 = fromAmount * uint256(sqrtPriceX96) * toAmount / Q96;
liquidity = uint128(tmp2 / tmp1);
}
Before Swap
$ Add liquidity to the pool...
> Before swap, remove liquidity last left...
> Calc a new tickLower, tickUpper and slot0 tick from quote
Optimizing liquidity provision by adjusting tick ranges to ensure 50% of the price range meets single-sided trading needs, with dynamic corrections to maintain target prices within the optimal zone.
Swap
$ Execute swap...
> Swap 2423.80 USDC to 1 ETH
> 👏 Swap successful!
After Swap
$ Check the price diff...
> Pool stats updated:
Liquidity is now `poolManager.getLiquidity(poolId)`, current Tick is `poolManager.getTick(poolId)`, and Delta amounts are `delta.amount0()` and `delta.amount1()`
if (delta.amount0() > 0 && delta.amount1() < 0) {
priceDiff = int256(targetAmount + delta.amount1()) * 1e18 / targetAmount;
}
if (delta.amount0() < 0 && delta.amount1() > 0) {
priceDiff = int256(targetAmount + delta.amount0()) * 1e18 / targetAmount;
}
San Francisco, CA // ETHGlobal Hackathon 2024/10/19