hmy_getLogs
hmy_getLogs
Get harmony logs for smart contracts or transactions

Parameters

  1. 1.
    Object - The filter options:
  2. 2.
    fromBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
  3. 3.
    toBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
  4. 4.
    address: DATA|Array, 20 Bytes - (optional) Contract address or a list of addresses from which logs should originate.
  5. 5.
    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.
  6. 6.
    blockhash: DATA, 32 Bytes - (optional) , 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.

Returns

For filters created with hmy_newBlockFilter the return are block hashes (DATA, 32 Bytes), e.g. ["0x3454645634534..."].
For filters created with hmy_newPendingTransactionFilter the return are transaction hashes (DATA, 32 Bytes), e.g. ["0x6345343454645..."].
For filters created with hmy_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 the 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 declared the event with the anonymous specifier.)
Sample Curl Request
curl -X POST --data
'{
"jsonrpc":"2.0",
"method":"hmy_getLogs",
"params":[
{"topics":
["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]
}
],
"id":74
}'
Sample Curl Response
{
"id":1,
"jsonrpc":"2.0",
"result": [{
"logIndex": "0x1", // 1
"blockNumber":"0x1b4", // 436
"blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
"transactionHash": "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
"transactionIndex": "0x0", // 0
"address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
"data":"0x0000000000000000000000000000000000000000000000000000000000000000",
"topics": ["0x59ebeb90bc63057b6515673c3ecf9438e5058bca0f92585014eced636878c9a5"]
},{
...
}]
}
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