API Reference

eth_getFilterChanges

Polling method for a filter, which returns an array of events that have occurred since the last poll.

📘

Supported on Arbitrum One (Nitro) only.

Parameters

  • quantity - The filter id that is returned from eth_newFilter, eth_newBlockFilter or eth_newPendingTransactionFilter

Returns

  • array - Array of one of the following, depending on the filter type, or empty if no changes since last poll:
    • eth_newBlockFilter
      • blockHash - The 32 byte hash of a block that meets your filter requirements.
    • eth_newPendingTransactionFilter
      • transactionhash - The 32 byte hash of a transaction that meets your filter requirements.
    • eth_newFilter
      • removed - Boolean true if log was removed, due to a chain reorganization. false if its a valid log.
      • logindex - Integer of log index position in the block encoded as a hexadecimal. null if pending.
      • transactionindex - Integer of transactions index position log was created from. null if pending.
      • transactionhash - Hash of the transactions this log was created from. null if pending.
      • blockhash - Hash of the block where this log was in. null when its pending. null if pending.
      • blocknumber - The block number where this log was, encoded as a hexadecimal. null if pending.
      • address - The address from which this log originated.
      • data - Contains one or more 32 Bytes non-indexed arguments of the log.
      • topics - Array of 0 to 4 32 Bytes of indexed log arguments.

API Endpoint

The format of an Arbitrum Nova API endpoint is
https://open-platform.nodereal.io/{{apiKey}}/arbitrum-nitro/

Here is an example:
https://open-platform.nodereal.io/4c0a1c23661a4e26bcbcwed461e34ea9/arbitrum-nitro/

Example

Request

curl https://open-platform.nodereal.io/{{apiKey}}/arbitrum-nitro/ \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{"method":"eth_getFilterChanges","params":["YOUR_FILTER_ID"],"id":1,"jsonrpc":"2.0"}'

Result