eth_getFilterChanges

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

Parameters:

QUANTITY - the filter id.

Returns:

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

• For filters created with eth_newBlockFilter the return are block hashes (DATA, 32 Bytes), e.g. ["0x3454645634534..."].

• For filters created with eth_newFilter logs are objects with the following params:

  • removed: TAG - true when the log was removed, due to a chain reorganization. false if its a valid log.

  • logIndex: QUANTITY - integer of the log index position in the block. null when its pending log.

  • transactionIndex: QUANTITY - integer of the transactions index position log was created from. null when its pending log.

  • transactionHash: DATA, 32 Bytes - hash of the transactions this log was created from. null when its pending log.

  • blockHash: DATA, 32 Bytes - hash of the block where this log was in. null when its pending log.

  • blockNumber: QUANTITY - the block number where this log was in. null when its pending log.

  • address: DATA, 20 Bytes - address from which this log originated.

  • data: DATA - contains one or more 32 Bytes non-indexed arguments of the log.

  • topics: Array of DATA - Array of 0 to 4 32 Bytes 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)), except you declared the event with the anonymous specifier.)

Example:

// Request
curl https://zksync-era.blockpi.network/v1/rpc/your-rpc-key -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getFilterChanges","params":["0x16"],"id":1}'

// Result
{
    "jsonrpc": "2.0",
    "id": 1,
    "result": []
}