eth_getFilterChanges - Ethereum

POST https://eth-mainnet.unifra.io/v1/{your-api-key}

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

Parameters

QUANTITY - The filter id.

JSON

params: ["0xfe704947a3cd3ca12541458a4321c869"];

---

Returns

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

---

Example

Request

cURL

curl https://eth-mainnet.unifra.io/v1/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_getFilterChanges","params":["0xfe704947a3cd3ca12541458a4321c869"],"id":73}'

Postman

URL: https://eth-mainnet.unifra.io/v1/your-api-key
RequestType: POST
Body:
{
    "jsonrpc":"2.0",
    "method":"eth_getFilterChanges",
    "params":["0xfe704947a3cd3ca12541458a4321c869"],
    "id":73
}

Result

JSON

{
    "jsonrpc": "2.0",
    "id": 73,
    "result": [{
        "address": "0xb5a5f22694352c15b00323844ad545abb2b11028",
        "blockHash": "0x99e8663c7b6d8bba3c7627a17d774238eae3e793dee30008debb2699666657de",
        "blockNumber": "0x5d12ab",
        "data": "0x0000000000000000000000000000000000000000000000a247d7a2955b61d000",
        "logIndex": "0x0",
        "removed": false,
        "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x000000000000000000000000bdc0afe57b8e9468aa95396da2ab2063e595f37e", "0x0000000000000000000000007503e090dc2b64a88f034fb45e247cbd82b8741e"],
        "transactionHash": "0xa74c2432c9cf7dbb875a385a2411fd8f13ca9ec12216864b1a1ead3c99de99cd",
        "transactionIndex": "0x3"
    }, {
        "address": "0xe38165c9f6deb144afc9c32c206b024817e1496d",
        "blockHash": "0x99e8663c7b6d8bba3c7627a17d774238eae3e793dee30008debb2699666657de",
        "blockNumber": "0x5d12ab",
        "data": "0x0000000000000000000000000000000000000000000000000000000025c6b720",
        "logIndex": "0x3",
        "removed": false,
        "topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x00000000000000000000000080e73e47173b2d00b531bf83bc39e710157125c3", "0x0000000000000000000000008f6cc93795969e5bbbf07c66dfee7d41ad24f1ef"],
        "transactionHash": "0x9e8f1cb1facb9a11a1cf947634053a0b2d557399f926b12127aa10497a2f0153",
        "transactionIndex": "0x5"
    }
}