Streams API
What is the Streams API?​
With Streams API you can listen for real time events on chain, you can listen for when a new event is emitted in your contract or for when a walltet address does an NFT transfer or a transaction. You can also get notifications for native and internal transactions. You will receive webhook requests for those events specific to your stream configuration.
Working With Webhooks​
Webhooks allow you to receive real-time notifications for events that are happening in relation to your application. When a supported event occurs, a real-time notification is posted, including a data payload, via HTTP POST method to a custom URL you provide.
Streams API features​
- Get blockchain events streamed to your backend directly in real-time
- Listen to wallets or contract events, or both with multiple streams
- Track one address or millions with just one stream, it is up to you
- Fully customize your streams using filters, you want to only want to listen to transactions over 1000 USDT, no problem
- Listen for events from all contract addresses
- Add your custom ABI and choose which events you want to listen too
- and much more...
Popular use cases​
- Realtime Wallet notifications (monitor when an address sends, receives, stakes, swaps, or burns assets)
- Monitor assets (get notifications when an asset is being sent, received, staked, swapped, or burned)
- In game specific events, for example when a battle starts in your web3 game
- Token sales (get notifications for when someone participates in your token sale)
- Any other smart contract event fires on-chain based on your filters
Listen to all addresses use cases​
- Listen to all NFT contract transfers tutorial
- Listen to all events from new contracts specific to a contract factory tutorial
- Listen to all NFT contracts transfers where sender is a specific address tutorial
- Listen to all ERC20 contract transfers where sender is a specific address and number of coins transferred is over 1000 tutorial
Run Smart Contract Functions​
- Run smart contract functions against Events Read more here!
Get Native Balances​
- Get Native Balances for addresses! Read more here!
High reliability​
- Moralis guarantees 100% delivery of Webhooks
- If your service is down Moralis will retry to send the webhook in intervals
- If your service fails to receive the webhooks you can manually replay
Supported chains​
| Chain | Chain Id (HEX) | Internal Transaction Supported | Note | Blocks until confirmed |
|---|---|---|---|---|
| APTOS MAINNET | mainnet | Not Applicable | 🔥 NEW | Not Applicable |
| APTOS TESTNET | testnet | Not Applicable | 🔥 NEW | Not Applicable |
Until a block is confirmed, it is possible that a re-organization of the chain may occur, invalidating some information. If a re-organization does occur before a block is confirmed, the information associated with the block is deleted and the updated block is inserted in its place.
To get started, check the following tutorials:​
- Your First Stream using NodeJS SDK
- Your First Stream using WebUI
- You can also use the Swagger Interface directly.