EventFilter¶
Aergo smart contract has event. It can be occured in specific block. Heraj provides api for querying event with a filtering.
Make¶
With block bumber.
// set event filter for specific address in block 1 ~ 10
ContractAddress contractAddress = ContractAddress
.of("AmNrsAqkXhQfE6sGxTutQkf9ekaYowaJFLekEm8qvDr1RB1AnsiM");
EventFilter eventFilter = EventFilter.newBuilder(contractAddress)
.fromBlockNumber(1L)
.toBlockNumber(10L)
.build();
System.out.println("Event filter: " + eventFilter);
Of recent block.
// set event filter for specific address in recent 1000 block
ContractAddress contractAddress = ContractAddress
.of("AmNrsAqkXhQfE6sGxTutQkf9ekaYowaJFLekEm8qvDr1RB1AnsiM");
EventFilter eventFilter = EventFilter.newBuilder(contractAddress)
.eventName("set")
.recentBlockCount(1000)
.build();
System.out.println("Event filter: " + eventFilter);
By event name and args.
// set event filter for specific address with name "set" and args "key" in recent 1000 block
ContractAddress contractAddress = ContractAddress
.of("AmNrsAqkXhQfE6sGxTutQkf9ekaYowaJFLekEm8qvDr1RB1AnsiM");
EventFilter eventFilter = EventFilter.newBuilder(contractAddress)
.eventName("set")
.args("key")
.recentBlockCount(1000)
.build();
System.out.println("Event filter: " + eventFilter);