Created
July 25, 2022 16:16
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class AptosEvent { | |
constructor( | |
readonly client: AptosClient, | |
readonly eventHandlerOwner: HexString, | |
readonly eventOwnerStruct: string, | |
readonly eventHandlerName: string, | |
readonly pollIntervalMs: number = 1000 | |
) {} | |
async onTrigger(callback: (e: any) => any) { | |
// Get the start sequence number in the EVENT STREAM, defaulting to the latest event. | |
const [{ sequence_number }] = await this.client.getEventsByEventHandle( | |
this.eventHandlerOwner, | |
this.eventOwnerStruct, | |
this.eventHandlerName, | |
{ limit: 1 } | |
); | |
// type for this is string for some reason | |
let lastSequenceNumber = sequence_number; | |
setInterval(async () => { | |
const events = await this.client.getEventsByEventHandle( | |
this.eventHandlerOwner, | |
this.eventOwnerStruct, | |
this.eventHandlerName, | |
{ | |
start: Number(lastSequenceNumber) + 1, | |
limit: 500, | |
} | |
); | |
if (events.length !== 0) { | |
// increment sequence number | |
lastSequenceNumber = events.at(-1)!.sequence_number; | |
} | |
for (let e of events) { | |
// fire off the callback for all new events | |
await callback(e); | |
} | |
}, this.pollIntervalMs); | |
} | |
} |
ahermida
commented
Jul 29, 2022
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