20 confirmations, about 40 seconds
OP Mainnet has 2-second blocks. Chainhook waits 20 blocks before sending an event.
OP Mainnet transfer webhooks
Watch any OP Mainnet (Optimism) address and get a signed webhook for every confirmed ERC-20 transfer.
OP Mainnet at a glance
What Chainhook waits for on OP Mainnet before it sends a webhook.
- API value
optimism- Block time
- About 2 seconds
- Confirmations
- 20
- Time to webhook
- About 40 seconds
- Address format
- Hex, 42 characters, starts with
0x - Token standard
- ERC-20
- Fees
- Gas, paid in ETH by the sender
- Explorer
- Optimistic Etherscan
Coins and tokens on OP Mainnet
Every coin and token Chainhook detects on OP Mainnet, with the contract it watches and its decimals.
| Symbol | Name | Contract address | Decimals |
|---|---|---|---|
| USDT | Tether USD | 0x94b008aa00579c1307b0ef2c499ad98a8ce58e58 | 6 |
| USDC | USD Coin | 0x0b2c639c533813f4aa9d7837caf62653d097ff85 | 6 |
| DAI | Dai Stablecoin | 0xda10009cbd5d07dd0cecc66161fc93d7c9000da1 | 18 |
| WETH | Wrapped Ether | 0x4200000000000000000000000000000000000006 | 18 |
| OP | Optimism | 0x4200000000000000000000000000000000000042 | 18 |
| WBTC | Wrapped BTC | 0x68f180fcce6836688e9084f035309e29bf0a2095 | 8 |
What to know about OP Mainnet
Gas is paid in ETH
Fees on OP Mainnet are paid in ETH, but native ETH there is not detected yet. WETH, OP and the other ERC-20 tokens listed here are.
Push, not polling
OP Mainnet produces a block every 2 seconds. Instead of polling an RPC for every address, register the address once and Chainhook pushes each confirmed transfer to you after 20 blocks.
POST /v1/webhooks
{
"network": "optimism",
"type": "address",
"direction": "in",
"address": "0x70598e346eb9a0653f0319cbce139f5a03e00d98",
"webhook_url": "https://api.example.com/webhooks/chainhook"
}OP Mainnet questions
Can't find your answer? Contact support.
Is OP Mainnet the same as Optimism?
Yes. OP Mainnet is the current name of the Optimism network. The webhook network value is optimism.
Does Chainhook detect the OP token?
Yes. OP is listed as an ERC-20 token on OP Mainnet.
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