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worker.ts
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worker.ts
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import { pipeline } from 'stream'
import { promisify } from 'util'
import { Utils } from '@aleph-indexer/core'
import {
BlockchainIndexerWorkerI,
IndexerDomainContext,
EntityDateRangeResponse,
IndexableEntityType,
ParserContext,
} from '@aleph-indexer/framework'
import {
BscParsedLog,
BscParsedTransaction,
} from '../services/parser/src/types.js'
const { StreamFilter, StreamMap, StreamBuffer } = Utils
export type BscTransactionIndexerWorkerDomainI = {
bscTransactionBufferLength?: number // default 1000
bscFilterTransaction(
context: ParserContext,
entity: BscParsedTransaction,
): Promise<boolean>
bscIndexTransactions(
context: ParserContext,
entities: BscParsedTransaction[],
): Promise<void>
}
export type BscLogIndexerWorkerDomainI = {
bscLogBufferLength?: number // default 1000
bscFilterLog(context: ParserContext, entity: BscParsedLog): Promise<boolean>
bscIndexLogs(context: ParserContext, entities: BscParsedLog[]): Promise<void>
}
export type BscIndexerWorkerDomainI = BscTransactionIndexerWorkerDomainI &
BscLogIndexerWorkerDomainI
export class BscIndexerWorkerDomain {
constructor(
protected context: IndexerDomainContext,
protected hooks: BscIndexerWorkerDomainI,
) {
this.checkBscIndexerHooks()
}
async onEntityDateRange(
response: EntityDateRangeResponse<any>,
): Promise<void> {
const { type } = response
if (type === IndexableEntityType.Transaction) {
return this.onTransactionDateRange(response)
}
if (type === IndexableEntityType.Log) {
return this.onLogDateRange(response)
}
}
protected async onTransactionDateRange(
response: EntityDateRangeResponse<BscParsedTransaction>,
): Promise<void> {
const { entities, ...context } = response
const filterTransaction = this.hooks.bscFilterTransaction.bind(
this.hooks,
context,
)
const indexTransactions = this.hooks.bscIndexTransactions.bind(
this.hooks,
context,
)
await promisify(pipeline)(
entities,
new StreamFilter(filterTransaction),
new StreamBuffer(this.hooks.bscTransactionBufferLength || 1000),
new StreamMap(indexTransactions),
)
}
protected async onLogDateRange(
response: EntityDateRangeResponse<BscParsedLog>,
): Promise<void> {
const { entities, ...context } = response
const filterLog = this.hooks.bscFilterLog.bind(this.hooks, context)
const indexLogs = this.hooks.bscIndexLogs.bind(this.hooks, context)
await promisify(pipeline)(
entities,
new StreamFilter(filterLog),
new StreamBuffer(this.hooks.bscLogBufferLength || 1000),
new StreamMap(indexLogs),
)
}
protected checkBscIndexerHooks(): void {
if (
(this.hooks.bscFilterTransaction === undefined ||
this.hooks.bscIndexTransactions === undefined) &&
(this.hooks.bscFilterLog === undefined ||
this.hooks.bscIndexLogs === undefined)
) {
throw new Error(
'BscIndexerWorkerDomainI must be implemented on WorkerDomain class',
)
}
}
protected checkBscTransactionIndexerHooks(): void {
if (
this.hooks.bscFilterTransaction === undefined ||
this.hooks.bscIndexTransactions === undefined
) {
throw new Error(
'BscTransactionIndexerWorkerDomainI or BscIndexerWorkerDomainI must be implemented on WorkerDomain class',
)
}
}
protected checkBscLogIndexerHooks(): void {
if (
this.hooks.bscFilterLog === undefined ||
this.hooks.bscIndexLogs === undefined
) {
throw new Error(
'BscLogIndexerWorkerDomainI or BscIndexerWorkerDomainI must be implemented on WorkerDomain class',
)
}
}
}
export async function bscWorkerDomainFactory(
context: IndexerDomainContext,
hooks: BscIndexerWorkerDomainI,
): Promise<BlockchainIndexerWorkerI<BscParsedTransaction>> {
return new BscIndexerWorkerDomain(context, hooks)
}