Logs

The Event Log API was designed to provide an alternative to the native eth_getLogs.

Below are the list of supported filter parameters:

• fromBlock, toBlock, address

• topic0, topic1, topic2, topic3 (32 Bytes per topic)

• topic0_1_opr (and|or between topic0 & topic1), topic1_2_opr (and|or between topic1 & topic2), topic2_3_opr (and|or between topic2 & topic3), topic0_2_opr (and|or between topic0 & topic2), topic0_3_opr (and|or between topic0 & topic3), topic1_3_opr (and|or between topic1 & topic3)

Some parameters to take note of 📝

• FromBlock & ToBlock accepts the blocknumber (integer, NOT hex) or 'latest' (earliest & pending is NOT supported yet)

• Topic Operator (opr) choices are either 'and' or 'or' and are restricted to the above choices only

• FromBlock & ToBlock parameters are required

• An address and/or topic(X) parameters are required, when multiple topic(X) parameters are used the topicX_X_opr (and|or operator) is also required

For performance & security considerations, only the first 1000 results are return. So please narrow down the filter parameters.

Sample Log API Queries

Get Event Logs from block number 8772590 to latest Block, where log address = 0xbdd4e5660839a088573191a9889a262c0efc0983 and topic[0] = 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef

https://api.cronoscan.com/api
   ?module=logs
   &action=getLogs
   &fromBlock=8772590
   &toBlock=latest
   &address=0xbdd4e5660839a088573191a9889a262c0efc0983
   &topic0=0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗

Get Event Logs from block number 8772590 to latest Block, where log address = 0xbdd4e5660839a088573191a9889a262c0efc0983 and topic[0] = 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef 'AND' topic[1] = 0x0000000000000000000000000920609f71d75b1124fde1f768c58fa1a538238b

https://api.cronoscan.com/api
   ?module=logs
   &action=getLogs
   &fromBlock=8772590
   &toBlock=latest
   &address=0xbdd4e5660839a088573191a9889a262c0efc0983
   &topic0=0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
   &topic0_1_opr=and
   &topic1=0x0000000000000000000000000920609f71d75b1124fde1f768c58fa1a538238b
   &apikey=YourApiKeyToken

Try this endpoint in your browser 🔗