Uniswap Pool Analysis

Overview

This skill covers querying and analyzing Uniswap v3/v4 pool state on-chain using viem.

Key Concepts

• sqrtPriceX96: Encoded price format used by Uniswap v3/v4. Convert with price = (sqrtPriceX96 / 2^96)^2
• Ticks: Discrete price points defining liquidity ranges. Tick spacing depends on fee tier.
• Liquidity: The L value representing active liquidity at the current tick.

Fee Tiers (v3)

| Fee (bps) | Tick Spacing | Typical Use | | ----------- | ------------ | ---------------- | | 1 (0.01%) | 1 | Stablecoin pairs | | 5 (0.05%) | 10 | Correlated pairs | | 30 (0.30%) | 60 | Standard pairs | | 100 (1.00%) | 200 | Exotic pairs |

Querying Pool State

Use the Uniswap v3 Pool ABI to read on-chain state:

import { createPublicClient, http } from "viem";
import { mainnet } from "viem/chains";

const client = createPublicClient({
  chain: mainnet,
  transport: http(process.env.ETHEREUM_RPC_URL),
});

// Read slot0 for current price and tick
const [
  sqrtPriceX96,
  tick,
  observationIndex,
  observationCardinality,
  observationCardinalityNext,
  feeProtocol,
  unlocked,
] = await client.readContract({
  address: poolAddress,
  abi: poolAbi,
  functionName: "slot0",
});

// Read liquidity
const liquidity = await client.readContract({
  address: poolAddress,
  abi: poolAbi,
  functionName: "liquidity",
});

Price Conversion

function sqrtPriceX96ToPrice(
  sqrtPriceX96: bigint,
  decimals0: number,
  decimals1: number,
): number {
  const price = Number(sqrtPriceX96) / 2 ** 96;
  return (price * price * 10 ** decimals0) / 10 ** decimals1;
}

function tickToPrice(
  tick: number,
  decimals0: number,
  decimals1: number,
): number {
  return (1.0001 ** tick * 10 ** decimals0) / 10 ** decimals1;
}

Liquidity Distribution

To analyze liquidity distribution across ticks:

1. Query tickBitmap to find initialized ticks
2. For each initialized tick, read ticks(tickIndex) to get liquidityNet
3. Walk from MIN_TICK to MAX_TICK, accumulating net liquidity changes
4. Plot cumulative liquidity vs price for the distribution

Multi-chain Support

Always accept a chainId parameter. Use the shared chain config from packages/common/ to resolve:

• RPC URL
• Pool factory address
• Quoter address
• Subgraph endpoint (if available)