Swap (Uniswap V3) event signature and topic0

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

const client = createPublicClient({ chain: mainnet, transport: http() })

const logs = await client.getLogs({
  address: "0x88e6a0c2ddd26feeb64f039a2c41296fcb3f5640",
  event: parseAbiItem("event Swap(address indexed sender, address indexed recipient, int256 amount0, int256 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick)"),
  fromBlock: "latest",
})

for (const log of logs) console.log(log.args) // { sender, recipient, amount0, amount1, sqrtPriceX96, liquidity, tick }

import { Interface, JsonRpcProvider } from "ethers"

const provider = new JsonRpcProvider(process.env.RPC_URL)
const iface = new Interface(["event Swap(address indexed sender, address indexed recipient, int256 amount0, int256 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick)"])

const logs = await provider.getLogs({
  address: "0x88e6a0c2ddd26feeb64f039a2c41296fcb3f5640",
  topics: [iface.getEvent("Swap")!.topicHash],
})

for (const log of logs) console.log(iface.parseLog(log)?.args)

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_getLogs",
  "params": [
    {
      "address": "0x88e6a0c2ddd26feeb64f039a2c41296fcb3f5640",
      "topics": [
        "0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67"
      ],
      "fromBlock": "latest"
    }
  ]
}

event Swap(address indexed sender, address indexed recipient, int256 amount0, int256 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick);

// inside a function:
emit Swap(sender, recipient, amount0, amount1, sqrtPriceX96, liquidity, tick);