Event signature · Stablecoins and issued tokens

DestroyedBlackFunds (USDT) event signature and topic0

The topic0 of the DestroyedBlackFunds (USDT) event is 0x61e6e66b0d6339b2980aecc6ccc0039736791f0ccde9ed512e789a7fbdd698c6, the keccak-256 hash of DestroyedBlackFunds(address,uint256); none of its arguments are indexed. A frozen address's balance destroyed by the token issuer (Tether).

Anatomy of a DestroyedBlackFunds (USDT) log

Topics

topic00x61e6e66b0d6339b2980aecc6ccc0039736791f0ccde9ed512e789a7fbdd698c6keccak256("DestroyedBlackFunds(address,uint256)")

Data

data_blackListedUser (address), _balance (uint256)ABI-encoded, decoded with the ABI

Parameters

Arguments and where they sit in the log

Indexed arguments travel as topics and can be filtered cheaply; the others are ABI-encoded together in the data.

Name	Type	In the log
_blackListedUser	address	data
_balance	uint256	data

Solidity declaration

event DestroyedBlackFunds(address _blackListedUser, uint256 _balance);

Canonical signature

DestroyedBlackFunds(address,uint256)

topic0

0x61e6e66b0d6339b2980aecc6ccc0039736791f0ccde9ed512e789a7fbdd698c6

Ready-made alerts

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Who emits it

Contracts we list that emit DestroyedBlackFunds

Any other contract with the same signature emits a log with the same topic0.

Tether (USDT)

0xdac17f958d2ee523a2206206994597c13d831ec7

Tracker: USDT (Tether)

Code

Read DestroyedBlackFunds logs in code

The same filter in viem, ethers and plain JSON-RPC, and the Solidity that emits it. The address is Tether (USDT), a contract we list that emits it.

viem

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

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

const logs = await client.getLogs({
  address: "0xdac17f958d2ee523a2206206994597c13d831ec7",
  event: parseAbiItem("event DestroyedBlackFunds(address _blackListedUser, uint256 _balance)"),
  fromBlock: "latest",
})

for (const log of logs) console.log(log.args) // { _blackListedUser, _balance }

ethers v6

import { Interface, JsonRpcProvider } from "ethers"

const provider = new JsonRpcProvider(process.env.RPC_URL)
const iface = new Interface(["event DestroyedBlackFunds(address _blackListedUser, uint256 _balance)"])

const logs = await provider.getLogs({
  address: "0xdac17f958d2ee523a2206206994597c13d831ec7",
  topics: [iface.getEvent("DestroyedBlackFunds")!.topicHash],
})

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

JSON-RPC (eth_getLogs)

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_getLogs",
  "params": [
    {
      "address": "0xdac17f958d2ee523a2206206994597c13d831ec7",
      "topics": [
        "0x61e6e66b0d6339b2980aecc6ccc0039736791f0ccde9ed512e789a7fbdd698c6"
      ],
      "fromBlock": "latest"
    }
  ]
}

Solidity

event DestroyedBlackFunds(address _blackListedUser, uint256 _balance);

// inside a function:
emit DestroyedBlackFunds(_blackListedUser, _balance);

Example

An example DestroyedBlackFunds log, encoded and decoded

Placeholder values, not a real transaction: how each argument is stored in the topics and the data, and what decoding gives back.

Encoded (as the node returns it)

topic0keccak256("DestroyedBlackFunds(address,uint256)")0x61e6e66b0d6339b2980aecc6ccc0039736791f0ccde9ed512e789a7fbdd698c6
data0x000000000000000000000000111111111111111111111111111111111111111100000000000000000000000000000000000000000000000000000000000007d0

Decoded with the ABI

_blackListedUseraddress0x1111111111111111111111111111111111111111
_balanceuint2562000

FAQ

Frequently asked questions

What is the topic0 of the DestroyedBlackFunds (USDT) event?

0x61e6e66b0d6339b2980aecc6ccc0039736791f0ccde9ed512e789a7fbdd698c6: the keccak-256 hash of DestroyedBlackFunds(address,uint256).

Which DestroyedBlackFunds (USDT) arguments are indexed?

None: _blackListedUser, _balance are ABI-encoded in the log's data, so a log can only be filtered by address and topic0.

How do I get an alert when a contract emits DestroyedBlackFunds (USDT)?

Open one of the ready-made rules on this page, or add any contract and pick DestroyedBlackFunds (USDT) from the event list. Conditions can be set on its arguments, and each alert names the contract and links to the transaction.

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