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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.

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Subscribing to Events

Sequence Indexer SubscribeEvents Method:
  • Request: POST /rpc/Indexer/SubscribeEvents
  • Content-Type: application/json
  • ボディ（JSON形式）：
    • 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.

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Subscribing to Balance Updates

Sequence Indexer SubscribeBalanceUpdates Method:

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Subscribing to Receipts

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