TransferBatch 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: "0xYourContractAddress",
  event: parseAbiItem("event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values)"),
  fromBlock: "latest",
})

for (const log of logs) console.log(log.args) // { operator, from, to, ids, values }

import { Interface, JsonRpcProvider } from "ethers"

const provider = new JsonRpcProvider(process.env.RPC_URL)
const iface = new Interface(["event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values)"])

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

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_getLogs",
  "params": [
    {
      "address": "0xYourContractAddress",
      "topics": [
        "0x4a39dc06d4c0dbc64b70af90fd698a233a518aa5d07e595d983b8c0526c8f7fb"
      ],
      "fromBlock": "latest"
    }
  ]
}

event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values);

// inside a function:
emit TransferBatch(operator, from, to, ids, values);