ApprovalForAll 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: "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
  event: parseAbiItem("event ApprovalForAll(address indexed owner, address indexed operator, bool approved)"),
  fromBlock: "latest",
})

for (const log of logs) console.log(log.args) // { owner, operator, approved }

import { Interface, JsonRpcProvider } from "ethers"

const provider = new JsonRpcProvider(process.env.RPC_URL)
const iface = new Interface(["event ApprovalForAll(address indexed owner, address indexed operator, bool approved)"])

const logs = await provider.getLogs({
  address: "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
  topics: [iface.getEvent("ApprovalForAll")!.topicHash],
})

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

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_getLogs",
  "params": [
    {
      "address": "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
      "topics": [
        "0x17307eab39ab6107e8899845ad3d59bd9653f200f220920489ca2b5937696c31"
      ],
      "fromBlock": "latest"
    }
  ]
}

event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

// inside a function:
emit ApprovalForAll(owner, operator, approved);