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

Parameters

  1. 1.
    QUANTITY - the filter id.
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params: [
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"0xfe704947a3cd3ca12541458a4321c869"
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]
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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.

Example

​Alchemy Composer​

The Alchemy Composer allows you to make a no-code example request via your browser. Try it out above!

Request

Curl
Postman
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curl https://eth-mainnet.alchemyapi.io/v2/your-api-key \
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-X POST \
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-H "Content-Type: application/json" \
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-d '{"jsonrpc":"2.0","method":"eth_getFilterChanges","params":["0xfe704947a3cd3ca12541458a4321c869"],"id":73}'
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URL: https://eth-mainnet.alchemyapi.io/v2/your-api-key
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RequestType: POST
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Body:
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{
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"jsonrpc":"2.0",
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"method":"eth_getFilterChanges",
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"params":["0xfe704947a3cd3ca12541458a4321c869"],
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"id":73
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}
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Result

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{
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"jsonrpc": "2.0",
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"id": 73,
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"result": [{
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"address": "0xb5a5f22694352c15b00323844ad545abb2b11028",
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"blockHash": "0x99e8663c7b6d8bba3c7627a17d774238eae3e793dee30008debb2699666657de",
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"blockNumber": "0x5d12ab",
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"data": "0x0000000000000000000000000000000000000000000000a247d7a2955b61d000",
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"logIndex": "0x0",
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"removed": false,
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"topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x000000000000000000000000bdc0afe57b8e9468aa95396da2ab2063e595f37e", "0x0000000000000000000000007503e090dc2b64a88f034fb45e247cbd82b8741e"],
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"transactionHash": "0xa74c2432c9cf7dbb875a385a2411fd8f13ca9ec12216864b1a1ead3c99de99cd",
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"transactionIndex": "0x3"
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}, {
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"address": "0xe38165c9f6deb144afc9c32c206b024817e1496d",
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"blockHash": "0x99e8663c7b6d8bba3c7627a17d774238eae3e793dee30008debb2699666657de",
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"blockNumber": "0x5d12ab",
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"data": "0x0000000000000000000000000000000000000000000000000000000025c6b720",
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"logIndex": "0x3",
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"removed": false,
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"topics": ["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "0x00000000000000000000000080e73e47173b2d00b531bf83bc39e710157125c3", "0x0000000000000000000000008f6cc93795969e5bbbf07c66dfee7d41ad24f1ef"],
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"transactionHash": "0x9e8f1cb1facb9a11a1cf947634053a0b2d557399f926b12127aa10497a2f0153",
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"transactionIndex": "0x5"
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}
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}
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Last modified 7d ago