klay_getFilterChanges

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

Parameters

Name
Type
Description

QUANTITY

string

The filter id (e.g., "0x16" // 22).

Return Value

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

Name
Type
Description

removed

TAG

true when the log was removed, due to a chain reorganization. false if it is a valid log.

logIndex

QUANTITY

Integer of the log index position in the block. null when it is a pending log.

transactionIndex

QUANTITY

Integer of the transactions index position log was created from. null when pending.

transactionHash

32-byte DATA

Hash of the transactions this log was created from. null when pending.

blockHash

32-byte DATA

Hash of the block where this log was in. null when pending.

blockNumber

QUANTITY

The block number where this log was in. null when pending.Address from which this log originated.

address

20-byte DATA

Address from which this log originated.

data

DATA

Contains the non-indexed arguments of the log.

topics

Array of DATA

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)), except you declared the event with the anonymous specifier.).

Example

// Request
curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_getFilterChanges","params":["0x16"],"id":73}' http://klaytn.blockpi.network/v1/rpc/your-api-key

// Result
{
    "id":1,
    "jsonrpc":"2.0",
    "result": [{
    "logIndex": "0x1", // 1
    "blockNumber":"0x1b4", // 436
    "blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "transactionHash":  "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
    "transactionIndex": "0x0", // 0
    "address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "data":"0x0000000000000000000000000000000000000000000000000000000000000000",
    "topics": ["0x59ebeb90bc63057b6515673c3ecf9438e5058bca0f92585014eced636878c9a5"]
    },{
        ...
    }]
}

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