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[Filter] klay_getFilterChanges

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

JSONRPC: klay_getFilterChanges

Request

application/json

Body

params QUANTITY (string)[]

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

Responses

200

Returns an array of logs which occurred since last poll.

application/json

Schema

Schema

error

object

code int64required

A Number that indicates the error type that occurred. This MUST be an integer.

code	message	description
-32700	Parse error	invalid JSON was received by the server. An error occurred on the server while parsing the JSON text.
-32602	Invalid params	Invalid method parameter(s).

message string

A String providing a short description of the error. The message SHOULD be limited to a concise single sentence.

data string

A Primitive or Structured value that contains additional information about the error. This may be omitted. The value of this member is defined by the Server (e.g. detailed error information, nested errors etc.).

result

object[]

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

Array [

anyOf

BlockHash

For filters created with klay_newBlockFilter, the return are block hashes (32-byte DATA), e.g., ["0x3454645634534..."].

string

TransactionHash

For filters created with klay_newPendingTransactionFilter, the return are transaction hashes (32-byte DATA), e.g., ["0x6345343454645..."].

string

LogObject

For filters created with klay_newFilter logs are objects with following properties

removed booleanrequired

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

logIndex hexrequired

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

transactionIndex hexrequired

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

transactionHash 32-byte DATArequired

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

blockHash 32-byte DATArequired

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

blockNumber hexrequired

The block number where this log was in. null when pending.

address 20-byte DATArequired

Address from which this log originated.

data DATArequired

Contains the non-indexed arguments of the log.

topics 32-byte DATA[]required

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 (from schema)

{
  "jsonrpc": "2.0",
  "id": 0,
  "error": {
    "code": -32700,
    "message": "Parse error",
    "data": "string"
  },
  "result": [
    {
      "address": "0x87ac99835e67168d4f9a40580f8f5c33550ba88b",
      "topics": [
        "0xfa9b2165fc71c1d6ffa03291c7f5d223ea363ec063d747eec9ce2d30d24855ef"
      ],
      "data": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000060000000000000000000000000d3564e57bb5c6f4d983a493a946534f8e1e8b481000000000000000000000000000000000000000000000000000000000000001341646472657373426f6f6b436f6e747261637400000000000000000000000000",
      "blockNumber": "0xd3b5",
      "transactionHash": "0x57ca8ff0a0d454d4c5418694c21bc4ef3de26cf7cd18dd404d6a7189a826bfe0",
      "transactionIndex": "0x0",
      "blockHash": "0x279251a907c6ab1fb723595511ff401432e7c2437d54189298f53a7d33ce3a60",
      "logIndex": "0x0",
      "removed": false
    },
    {
      "address": "0x87ac99835e67168d4f9a40580f8f5c33550ba88b",
      "topics": [
        "0xfa3e1e272694072320aad73a3fadd8876c4bf8f40899c6c7ce2fda9f4e652cfa"
      ],
      "data": "0x00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000000300000000000000000000000041383b6ee0ea5108d6b139165a9c85351aacd39800000000000000000000000057f7439898e652fa9b5654022297588532e5e0370000000000000000000000005b5b7a718a4124eb746ae00b1ce6edcaa5ab55bc",
      "blockNumber": "0xd3b5",
      "transactionHash": "0x57ca8ff0a0d454d4c5418694c21bc4ef3de26cf7cd18dd404d6a7189a826bfe0",
      "transactionIndex": "0x0",
      "blockHash": "0x279251a907c6ab1fb723595511ff401432e7c2437d54189298f53a7d33ce3a60",
      "logIndex": "0x1",
      "removed": false
    }
  ]
}

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