Subscriptions

Subscribe to Blockchain Events

You can subscribe to different blockchain events in real time using subscription endpoints. Use filters to listen for particular contract addresses, account addresses, and/or token IDs.

Subscribing to Events

Sequence Indexer SubscribeEvents Method:

Request: POST /rpc/Indexer/SubscribeEvents
Content-Type: application/json
Body (in JSON):
- Filters ([]object) -- an array of filters
  - contractAddresses ([]string) -- a ERC20 / ERC721 / ERC1155 contract address
  - accounts ([]string) -- wallet addresses
  - tokenIDs ([]int) optional -- an array of token ids
  - events ([]string) -- an array of event names
  - topicHashes ([]string) -- an array of topic hashes

One of contractAddresses, accounts must be provided in the filter.

Subscribing to Balance Updates

Sequence Indexer SubscribeBalanceUpdates Method:

Subscribing to Receipts

Sequence Indexer SubscribeBalanceUpdates Method:

Example SubscribeEvents

cURL

curl -X POST \
  -H 'Content-type: application/json' \
  -H "X-Access-Key: c3bgcU3LkFR9Bp9jFssLenPAAAAAAAAAA" \
  https://polygon-indexer.sequence.app/rpc/Indexer/SubscribeBalanceUpdates \
  -d '{"contractAddress":"0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359"}'