eth_getFilterChanges

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

PARAMETERS

Filter ID - (required) The filter ID.

REQUEST

{
    "jsonrpc":"2.0",
    "method":"eth_getFilterChanges",
    "params":["0x433f460405cc3301fc07314056de481e"],
    "id":73
}

RESPONSE

Result - An array of log objects, or an empty array if nothing has changed since the last poll.

NOTE: eth_getFilterChanges only returns logs since the filter was created, regardless of the block passed in to create the filter. To get logs ranging from a specific block you should use eth_getLogs.

For filters created with eth_newBlockFilter the return are block hashes, e.g. ["0x3454645634534..."].
For filters created with eth_newPendingTransactionFilter the return are transaction hashes, e.g. ["0x6345343454645..."].
For filters created with eth_newFilter logs are objects with the following parameters:
- removed - true when the log was removed, due to a chain reorganization. false if it's a valid log.
- logIndex - The log index position in the block. null when it's a pending log.
- transactionIndex - The transaction's index position log was created from. null when it's a pending log.
- transactionHash - Hash of the transactions this log was created from. null when it's a pending log.
- blockHash - Hash of the block where this log was in. null when it's pending. null when it's a pending log.
- blockNumber - The block number where this log was in. null when it's pending. null when it's a pending log.
- address - Address from which this log originated.
- data - Contains one or more 32 Bytes non-indexed arguments of the log.
- topics - An array of 0 to 4 32-byte DATA of indexed log arguments.
  - In Solidity, the first topic is the hash of the signature of the event (e.g. Deposit(address,bytes32,uint256)), unless you declare the event with the anonymous specifier.

{
    "jsonrpc": "2.0",
    "id": 73,
    "result": []
}