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BNB Smart Chain ETH transfer notifications, delivered as webhooks

Get a signed webhook when a BNB Smart Chain address sends or receives Ethereum Token (ETH). Chainhook waits 15 blocks, about 7 seconds, then posts the transfer to your endpoint.

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ETH on BNB Smart Chain at a glance

The contract Chainhook watches, how amounts are scaled, and how long ETH takes to reach your endpoint.

Token
Ethereum Token (ETH)
Network
BNB Smart Chain
Contract
0x2170ed0880ac9a755fd29b2688956bd959f933f8
Decimals
18
Confirmations
15
Time to webhook
About 7 seconds

How ETH BEP-20 webhooks work

At sub-second block times, polling BscScan or a public RPC for each address quickly runs into rate limits, and eth_getLogs ranges have to be paged carefully so no block is skipped. Chainhook scans every block once, waits 15 confirmations, and pushes only the transfers that match your addresses.

  1. Register the address

    Create a webhook with network: "bsc", type: "token" and the address you want to watch. The signing secret is returned once.

  2. Chainhook waits for confirmations

    Every BNB Smart Chain block is scanned. A matching ETH transfer is held until it is 15 blocks deep, about 7 seconds.

  3. Your endpoint gets a signed POST

    A transfer.detected event arrives with an X-Webhook-Signature header. Failed attempts are retried automatically, up to 3 attempts in total, waiting 1 minute, then 5 minutes between attempts.

POST /v1/webhooks

{
  "network": "bsc",
  "type": "token",
  "direction": "in",
  "address": "0x70598e346eb9a0653f0319cbce139f5a03e00d98",
  "webhook_url": "https://api.example.com/webhooks/chainhook"
}

Sample webhook payload

What your endpoint receives for an incoming ETH transfer on BNB Smart Chain. amount is already scaled by decimals; amount_raw is the on-chain integer.

ETH on BNB Smart Chain

POST /webhooks/chainhook HTTP/1.1
Host: api.example.com
Content-Type: application/json
User-Agent: chainhook/1.x
X-Webhook-Id: 01a0fbfd-4fe4-7a3c-8f21-6b9d0e4c7a15
X-Webhook-Signature: 7a12d02673420517279805cf8188a1a62c6f69706161ba5cf0a8ec91ea66b8e3

{
  "id": "01a0fbfd-4fe4-7a3c-8f21-6b9d0e4c7a15",
  "event": "transfer.detected",
  "created_at": "2026-10-02T09:41:17Z",
  "webhook_id": "01a0fbf2-fadc-7c3e-9b1a-4d6f2e8a5c71",
  "data": {
    "network": "bsc",
    "direction": "in",
    "type": "token",
    "transaction_hash": "0x97f2a62294957e4db3e85410583bc9d394d25df9988b01544eae5078f3399a73",
    "transfer_index": 33,
    "block_number": 128946007,
    "block_hash": "0xd4241fc2adbee87eb54a0c94ca5b31e97387715f186967b6df5ce36f1f278414",
    "block_timestamp": "2026-10-02T09:41:05Z",
    "confirmations": 15,
    "from": "0x3c3facc56a38aab3314e6a46dc4f1c9f303b023e",
    "to": "0x70598e346eb9a0653f0319cbce139f5a03e00d98",
    "currency": "ETH",
    "amount": "0.5",
    "amount_raw": "500000000000000000",
    "decimals": 18,
    "contract_address": "0x2170ed0880ac9a755fd29b2688956bd959f933f8"
  }
}

Verify the signature

X-Webhook-Signature is a hex HMAC-SHA256 of the raw body, keyed with your webhook's secret. Reject any request where it doesn't match.

import crypto from 'node:crypto';
import express from 'express';

const app = express();

app.post(
  '/webhooks/chainhook',
  express.raw({ type: 'application/json' }),
  (req, res) => {
    const signature = req.get('X-Webhook-Signature') ?? '';
    const expected = crypto
      .createHmac('sha256', process.env.CHAINHOOK_SIGNING_SECRET)
      .update(req.body)
      .digest('hex');

    const valid =
      signature.length === expected.length &&
      crypto.timingSafeEqual(Buffer.from(signature), Buffer.from(expected));

    if (!valid) {
      return res.sendStatus(401);
    }

    const event = JSON.parse(req.body);
    // Skip event.id if you've already processed it.

    res.sendStatus(200);
  },
);

Crediting ETH deposits safely

A wrapped asset

Ethereum Token (ETH) is a wrapped BEP-20 token that tracks another asset on BNB Smart Chain. Chainhook detects it as a token, separately from any native coin on the network.

Only this contract

Chainhook watches 0x2170ed0880ac9a755fd29b2688956bd959f933f8. Versions of ETH bridged to BNB Smart Chain through other routes are separate tokens and are not reported.

18 decimals

ETH on BNB Smart Chain uses 18 decimals. Credit the amount string, or scale amount_raw by decimals; never parse amounts as floating-point numbers.

Credit once per transfer

Delivery is at least once. Store the event id, or transaction_hash with transfer_index, and skip events you have already processed.

Pay per detection

Start with 100 trial detections for 1 month and pay only for what you use. Paid plans add detections, webhooks, and per-detection overage.

  • Pay as you go

    $0/month

    Card required, no monthly fee

    • 100 trial detections for 1 month
    • 3 active webhooks
    • $0.001 per detection after the trial
    • Decoded transfers, delivered once confirmed
    Start for free

  • Starter

    $9/month

    or $90/year billed yearly

    • 25,000 detections a month
    • 25 active webhooks
    • $0.0006 per extra detection
    • Decoded transfers, delivered once confirmed
    Subscribe
  • Recommended

    Growth

    $29/month

    or $290/year billed yearly

    • 100,000 detections a month
    • 100 active webhooks
    • $0.0003 per extra detection
    • Decoded transfers, delivered once confirmed
    Subscribe

  • Scale

    $99/month

    or $990/year billed yearly

    • 400,000 detections a month
    • 200 active webhooks
    • $0.0002 per extra detection
    • Decoded transfers, delivered once confirmed
    Subscribe

Enterprise

Custom limits for teams that need more than 400,000 detections a month or more than 200 active webhooks. Contact us and we'll set up a plan around your volume.

Contact support

Prices in USD, plus applicable tax. Billed monthly or yearly, and paid allowances reset monthly. Cancel any time and keep your plan until the period ends.

Compare plans and estimate your bill

ETH on BNB Smart Chain questions

Can't find your answer? Contact support.

What is the ETH contract address on BNB Smart Chain?

0x2170ed0880ac9a755fd29b2688956bd959f933f8, with 18 decimals.

How do I detect an incoming ETH transfer on BNB Smart Chain?

Create a webhook with network: "bsc", type: "token", direction: "in" and the receiving address. Each confirmed ETH transfer arrives as a transfer.detected event.

How long until a ETH transfer is reported?

About 7 seconds. Chainhook waits 15 blocks on BNB Smart Chain before it sends the event.

Does Chainhook need my private key?

No. Chainhook only reads public blockchain data. You register a public address and receive events about it.

Watch your first wallet

Create an account and start with 100 trial detections for 1 month.

Start for free