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* as IlpPacket from 'ilp-packet'\nimport {\n Middleware,\n MiddlewareCallback,\n MiddlewareServices,\n Pipelines\n} from '../types/middleware'\nimport Stats from '../services/stats'\nimport { AccountInfo } from '../types/accounts'\n\nexport default class StatsMiddleware implements Middleware {\n private stats: Stats\n\n private getInfo: (accountId: string) => AccountInfo\n\n constructor (opts: {}, { stats, getInfo }: MiddlewareServices) {\n this.stats = stats\n this.getInfo = getInfo\n }\n\n async applyToPipelines (pipelines: Pipelines, accountId: string) {\n const accountInfo = this.getInfo(accountId)\n if (!accountInfo) {\n throw new Error('could not load info for account. accountId=' + accountId)\n }\n const account = { accountId, accountInfo }\n pipelines.incomingData.insertLast({\n name: 'stats',\n method: async (data: Buffer, next: MiddlewareCallback<Buffer, Buffer>) => {\n try {\n const result = await next(data)\n if (result[0] === IlpPacket.Type.TYPE_ILP_FULFILL) {\n this.stats.incomingDataPackets.increment(account, { result: 'fulfilled' })\n } else {\n this.stats.incomingDataPackets.increment(account, { result: 'rejected' })\n }\n return result\n } catch (err) {\n this.stats.incomingDataPackets.increment(account, { result: 'failed' })\n throw err\n }\n }\n })\n\n pipelines.incomingMoney.insertLast({\n name: 'stats',\n method: async (amount: string, next: MiddlewareCallback<string, void>) => {\n try {\n const result = await next(amount)\n this.stats.incomingMoney.setValue(account, { result: 'succeeded' }, +amount)\n return result\n } catch (err) {\n this.stats.incomingMoney.setValue(account, { result: 'failed' }, +amount)\n throw err\n }\n }\n })\n\n pipelines.outgoingData.insertLast({\n name: 'stats',\n method: async (data: Buffer, next: MiddlewareCallback<Buffer, Buffer>) => {\n try {\n const result = await next(data)\n if (result[0] === IlpPacket.Type.TYPE_ILP_FULFILL) {\n this.stats.outgoingDataPackets.increment(account, { result: 'fulfilled' })\n } else {\n const rejectPacket = IlpPacket.deserializeIlpReject(result)\n const { code } = rejectPacket\n this.stats.outgoingDataPackets.increment(account,\n { result: 'rejected', code })\n }\n return result\n } catch (err) {\n this.stats.outgoingDataPackets.increment(account, { result: 'failed' })\n throw err\n }\n }\n })\n\n pipelines.outgoingMoney.insertLast({\n name: 'stats',\n method: async (amount: string, next: MiddlewareCallback<string, void>) => {\n try {\n const result = await next(amount)\n this.stats.outgoingMoney.setValue(account, { result: 'succeeded' }, +amount)\n return result\n } catch (err) {\n this.stats.outgoingMoney.setValue(account, { result: 'failed' }, +amount)\n throw err\n }\n }\n })\n }\n}\n"]} |