Fast blocks, fast events
Arbitrum One produces a block about every quarter second, so 20 confirmations take about 6 seconds.
Arbitrum transfer webhooks
Watch any Arbitrum One address and get a signed webhook for every confirmed ERC-20 transfer, usually within seconds of the transaction.
Arbitrum One at a glance
What Chainhook waits for on Arbitrum One before it sends a webhook.
- API value
arbitrum- Block time
- About 0.28 seconds
- Confirmations
- 20
- Time to webhook
- About 6 seconds
- Address format
- Hex, 42 characters, starts with
0x - Token standard
- ERC-20
- Fees
- Gas, paid in ETH by the sender
- Explorer
- Arbiscan
Coins and tokens on Arbitrum One
Every coin and token Chainhook detects on Arbitrum One, with the contract it watches and its decimals.
| Symbol | Name | Contract address | Decimals |
|---|---|---|---|
| USDT | Tether USD | 0xfd086bc7cd5c481dcc9c85ebe478a1c0b69fcbb9 | 6 |
| USDC | USD Coin | 0xaf88d065e77c8cc2239327c5edb3a432268e5831 | 6 |
| DAI | Dai Stablecoin | 0xda10009cbd5d07dd0cecc66161fc93d7c9000da1 | 18 |
| WETH | Wrapped Ether | 0x82af49447d8a07e3bd95bd0d56f35241523fbab1 | 18 |
| ARB | Arbitrum | 0x912ce59144191c1204e64559fe8253a0e49e6548 | 18 |
| WBTC | Wrapped BTC | 0x2f2a2543b76a4166549f7aab2e75bef0aefc5b0f | 8 |
What to know about Arbitrum One
Sequencer order, Ethereum settlement
Blocks come from the Arbitrum sequencer and are later posted to Ethereum. Chainhook reports transfers once they are 20 blocks deep on Arbitrum, which is the point most apps treat as confirmed.
Gas is paid in ETH
Fees on Arbitrum are paid in ETH, but native ETH on Arbitrum is not detected yet. ERC-20 tokens, including WETH, are.
Push, not polling
Arbitrum produces several blocks per second. Polling an RPC per address burns through rate limits, and log queries have to be paged without gaps. Chainhook scans each block once, waits 20 blocks, and pushes only your transfers.
POST /v1/webhooks
{
"network": "arbitrum",
"type": "address",
"direction": "in",
"address": "0x3c3facc56a38aab3314e6a46dc4f1c9f303b023e",
"webhook_url": "https://api.example.com/webhooks/chainhook"
}Arbitrum One questions
Can't find your answer? Contact support.
Does Chainhook support Arbitrum Nova?
No. This page covers Arbitrum One only.
Does Chainhook detect ETH on Arbitrum?
Not native ETH yet. WETH and the other ERC-20 tokens listed here are detected.
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