EventFilter¶
Aergo smart contract에는 각 블록에 발생여부가 등록되는 event가 있습니다. Heraj는 이러한 이벤트를 filter를 사용해서 조회하는 기능을 제공합니다.
Make¶
Block number filter 설정.
// 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);
최근 block filter 설정.
// 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);
Event 이름과 인자로 filter 설정.
// 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);