eth_getLogs

Returns an array of all logs matching a given filter object.

The eth_getLogs command allows users to view events that occurred on the blockchain based on one or more of the filter objects listed below.

Limits

Requests can have a block range of at most 500 blocks.

Parameters

Object - The filter options:

• fromBlock: QUANTITY|TAG - (optional, default: "latest") Value:

  • Integer block number

  • Hexadecimal string block number (e.g. "0xabcd")

  • "latest" for the last mined block

  • "pending" and "earliest" are not supported

• toBlock: QUANTITY|TAG - (optional, default: "latest") Value:

  • Integer block number

  • Hexadecimal string block number (e.g. "0xabcd"

  • "latest" for the last mined block - only valid if fromBlock is also "latest"

  • "pending" and "earliest" are not supported

• address: DATA|Array, 20 Bytes - (optional) Contract address or a list of addresses from which logs should originate.

• topics: Array of DATA, - (optional) Array of 32 Bytes DATA topics.

  • Topics are order-dependent. Each topic can also be an array of DATA with "or" options.

• blockHash: DATA, 32 Bytes - (optional) With the addition of EIP-234 (Geth >= v1.8.13 or Parity >= v2.1.0), blockHash is a new filter option which restricts the logs returned to the single block with the 32-byte hash blockHash. Using blockHash is equivalent to fromBlock = toBlock = the block number with hash blockHash. If blockHash is present in the filter criteria, then neither fromBlock nor toBlock are allowed.

params: [
  {
    "address": "0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907",
    "topics": [
      "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"
    ],
    "blockHash": "0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb"
  }
]

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_newPendingTransactionFilter the return are transaction hashes (DATA, 32 Bytes), e.g. ["0x6345343454645..."].

• For filters created with eth_newFilter logs are objects with 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. null when its pending log.

  • blockNumber: QUANTITY - the block number where this log was in. null when its pending. 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 declare the event with the anonymous specifier.

Topics are order-dependent. A transaction with a log with topics [A, B] will be matched by the following topic filters:

• [] “anything”

• [A] “A in first position (and anything after)”

• [null, B] “anything in first position AND B in second position (and anything after)”

• [A, B] “A in first position AND B in second position (and anything after)”

• [[A, B], [A, B]] “(A OR B) in first position AND (A OR B) in second position (and anything after)”

Example Request and Result for eth_getLogs

Request

curl https://rpc-mainnet.u2u.xyz \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getLogs","params":[{"address": "0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907","topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"],"blockHash": "0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb"}],"id":0}'

Result

{
  "jsonrpc": "2.0",
  "id": 0,
  "result": [
    {
      "address": "0xb59f67a8bff5d8cd03f6ac17265c550ed8f33907",
      "topics": [
        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
        "0x00000000000000000000000000b46c2526e227482e2ebb8f4c69e4674d262e75",
        "0x00000000000000000000000054a2d42a40f51259dedd1978f6c118a0f0eff078"
      ],
      "data": "0x000000000000000000000000000000000000000000000000000000012a05f200",
      "blockNumber": "0x429d3b",
      "transactionHash": "0xab059a62e22e230fe0f56d8555340a29b2e9532360368f810595453f6fdd213b",
      "transactionIndex": "0xac",
      "blockHash": "0x8243343df08b9751f5ca0c5f8c9c0460d8a9b6351066fae0acbd4d3e776de8bb",
      "logIndex": "0x56",
      "removed": false
    }
  ]
}