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

Parameters

Params - a string array containing (required):
  • QUANTITY(hex string, required) - the filter id.

Returns

Array(array of objects) - 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(hex string), 32 Bytes), e.g. ["0x3454645634534..."].
  • For filters created with eth_newPendingTransactionFilter the return are transaction hashes (DATA(hex string), 32 Bytes), e.g. ["0x6345343454645..."].
  • For filters created with eth_newFilter logs are objects with following params:
    • removed(boolean): TAG - true when the log was removed, due to a chain reorganization. false if its a valid log.
    • logIndex(integer number): QUANTITY - integer of the log index position in the block. null when its pending log.
    • transactionIndex(integer number): QUANTITY - integer of the transactions index position log was created from. null when its pending log.
    • transactionHash(hex string): DATA, 32 Bytes - hash of the transactions this log was created from. null when its pending log.
    • blockHash(hex string): DATA, 32 Bytes - hash of the block where this log was in. null when its pending. null when its pending log.
    • blockNumber(integer number): QUANTITY - the block number where this log was in. null when its pending. null when its pending log.
    • address(hex string): DATA, 20 Bytes - address from which this log originated.
    • data(hex string): DATA - contains one or more 32 Bytes non-indexed arguments of the log.
    • topics(array of hex string): 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 https://blockvision.org/v1/<your api key> \
-X POST \
-H "Content-Type: application/json" \
-d '{
"jsonrpc": "2.0",
"method": "eth_getFilterChanges",
"params": [
"0xfe704947a3cd3ca12541458a4321c869"
],
"id": 73
}'

Result

{
"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"
}
}
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