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* as IlpPacket from 'ilp-packet'\nimport { create as createLogger } from '../common/log'\nconst log = createLogger('ilp-prepare')\nimport reduct = require('reduct')\n\nimport Accounts from '../services/accounts'\nimport RouteBuilder from '../services/route-builder'\nimport RateBackend from '../services/rate-backend'\nimport PeerProtocolController from '../controllers/peer-protocol'\nimport EchoController from '../controllers/echo'\n\nconst PEER_PROTOCOL_PREFIX = 'peer.'\n\nexport default class IlpPrepareController {\n private accounts: Accounts\n private routeBuilder: RouteBuilder\n private backend: RateBackend\n private peerProtocolController: PeerProtocolController\n private echoController: EchoController\n\n constructor (deps: reduct.Injector) {\n this.accounts = deps(Accounts)\n this.routeBuilder = deps(RouteBuilder)\n this.backend = deps(RateBackend)\n this.peerProtocolController = deps(PeerProtocolController)\n this.echoController = deps(EchoController)\n }\n\n async sendData (\n packet: Buffer,\n sourceAccount: string,\n outbound: (data: Buffer, accountId: string) => Promise<Buffer>\n ) {\n const parsedPacket = IlpPacket.deserializeIlpPrepare(packet)\n const { amount, executionCondition, destination, expiresAt } = parsedPacket\n\n log.trace('handling ilp prepare. sourceAccount=%s destination=%s amount=%s condition=%s expiry=%s packet=%s', sourceAccount, destination, amount, executionCondition.toString('base64'), expiresAt.toISOString(), packet.toString('base64'))\n\n if (destination.startsWith(PEER_PROTOCOL_PREFIX)) {\n return this.peerProtocolController.handle(packet, sourceAccount, { parsedPacket })\n } else if (destination === this.accounts.getOwnAddress()) {\n return this.echoController.handle(packet, sourceAccount, { parsedPacket, outbound })\n }\n\n const { nextHop, nextHopPacket } = await this.routeBuilder.getNextHopPacket(sourceAccount, parsedPacket)\n\n log.trace('sending outbound ilp prepare. destination=%s amount=%s', destination, nextHopPacket.amount)\n const result = await outbound(IlpPacket.serializeIlpPrepare(nextHopPacket), nextHop)\n\n this.backend.submitPacket({\n sourceAccount: sourceAccount,\n sourceAmount: amount,\n destinationAccount: nextHop,\n destinationAmount: nextHopPacket.amount,\n parsedPacket,\n result\n }).catch(err => {\n const errInfo = (err && typeof err === 'object' && err.stack) ? err.stack : String(err)\n log.error('error while submitting packet to backend. error=%s', errInfo)\n })\n\n if (result[0] === IlpPacket.Type.TYPE_ILP_FULFILL) {\n log.trace('got fulfillment. cond=%s nextHop=%s amount=%s', executionCondition.slice(0, 6).toString('base64'), nextHop, nextHopPacket.amount)\n\n this.backend.submitPayment({\n sourceAccount: sourceAccount,\n sourceAmount: amount,\n destinationAccount: nextHop,\n destinationAmount: nextHopPacket.amount\n })\n .catch(err => {\n const errInfo = (err && typeof err === 'object' && err.stack) ? err.stack : String(err)\n log.error('error while submitting payment to backend. error=%s', errInfo)\n })\n } else if (result[0] === IlpPacket.Type.TYPE_ILP_REJECT) {\n const parsed = IlpPacket.deserializeIlpReject(result)\n\n log.trace('got rejection. cond=%s nextHop=%s amount=%s code=%s triggeredBy=%s message=%s', executionCondition.slice(0, 6).toString('base64'), nextHop, nextHopPacket.amount, parsed.code, parsed.triggeredBy, parsed.message)\n }\n\n return result\n }\n}\n"]} |