Watch any Ethereum address with 🦉 eth-owl to receive real-time callbaks to your webhooks (or emails) for each incoming/outgoing transaction. A permissionless, pseudo-anonymous Ethereum SaaS for developers.

• setup your REST API endpoint that will receive POST requests from 🦉 eth-owl
• purchase your webhook or email subscription via the ethOwl smart contract https://etherscan.io/address/0x70C92A8A51191378a6ec8ce0493aa7a3f469425C#writeContract

{
  purchase: 0.1, // 🦉 `eth-owl` costs 0.1 ETH per webhook, per year
  _addr: '0x70C92A8A51191378a6ec8ce0493aa7a3f469425C', // address to watch
  _endpoint: 'https://yhk4twhgq8.execute-api.us-east-1.amazonaws.com/prod/swoops' // your REST API endpoint that will be pinged (a POST request) for each incoming/outgoing transaction to `_addr`
}

Price is the same as webhooks. 0.1 ETH to subscribe your email address to an Ethereum address for 1 year. Email is within ~1 min of the transaction being confirmed, and includes the Ethereum address, transaction hash, and a link to the transaction on Etherscan.

• PATH

  • /{your_endpoint_name}

• Method:

  • POST

• Data params:

  • Required:
    • address=[string] The Ethereum address with an incoming/outgoing transaction that triggered this POST request
    • hash=[string] The transaction hash that triggered this POST request

• Success response:

  • statusCode: {status_code}

• Error response:

  • statusCode: {error_code} 🦉 eth-owl will retry the POST request 60 seconds later upon an error

• Sample Call: curl -d '{"address":"0x70C92A8A51191378a6ec8ce0493aa7a3f469425C", "hash":"0xf6d591442a2ae297c383fe74d9e28233844da780f39d93037540232ea75ce6fa"}' -H "Content-Type: application/json" -X POST https://yhk4twhgq8.execute-api.us-east-1.amazonaws.com/prod/swoops

In our example swoops, we use the Serverless Framework to have a Lambda function run anytime our endpoint is pinged by 🦉 eth-owl.

eth-owl watches the EthOwl smart contract 0x70C92A8A51191378a6ec8ce0493aa7a3f469425C where webhooks are purchased by our users. The swoops endpoint is pinged by eth-owl for each incoming/outgoing transaction to this address (smart contract). The code it runs adds the _addr and _endpoint EthOwl emits with its Hoot event to our database. 🦉 eth-owl now watches all incoming/outgoing transactions for _addr and hoots to endpoint! So swoops is not only an example for you to follow to quickly get started, it dog-foods 🦉 eth-owl, and this is the exact code that runs when you purchase a webhook via our EthOwl smart contract!

• 🦉 eth-owl will ping your webhook within a few blocks of a transaction occuring. Expect a ~1 min delay. If customers ask, latency can be reduced
• 🦉 eth-owl is trust minimized. You can run your own node (or ethql, as we do in swoops) to actually verify the address and hash in the POST request, and parse the transaction data/events. You should not trust 🦉 eth-owl for anything other than its hoots! Especially because POST requests are not signed currently (another feature that can be implemented if customers ask)

🦉 eth-owl is not fazed by what it sees. It watches the Ethereum blockchain, and occasionally hoots