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": []
}

200An array of log objects, or an empty array if nothing has changed since last poll.

400Bad Request. The request could not be understood by the server due to malformed syntax.