| 1 | {"version":3,"file":"route-builder.js","sourceRoot":"","sources":["route-builder.ts"],"names":[],"mappings":";;AAAA,+CAAoC;AACpC,yCAAiC;AACjC,mDAA0C;AAC1C,iDAAwC;AACxC,qCAA6B;AAE7B,wCAAuC;AACvC,uCAAsD;AACtD,MAAM,GAAG,GAAG,YAAY,CAAC,eAAe,CAAC,CAAA;AACzC,MAAM,EACJ,wBAAwB,EACxB,kBAAkB,EAClB,oBAAoB,EACpB,gBAAgB,EACjB,GAAG,SAAS,CAAC,MAAM,CAAA;AAEpB,MAAqB,YAAY;IAQ/B,YAAa,IAAqB;QAChC,IAAI,CAAC,QAAQ,GAAG,IAAI,CAAC,kBAAQ,CAAC,CAAA;QAC9B,IAAI,CAAC,YAAY,GAAG,IAAI,CAAC,uBAAY,CAAC,CAAA;QACtC,IAAI,CAAC,OAAO,GAAG,IAAI,CAAC,sBAAW,CAAC,CAAA;QAChC,IAAI,CAAC,MAAM,GAAG,IAAI,CAAC,gBAAM,CAAC,CAAA;QAE1B,IAAI,CAAC,aAAa;YAChB,IAAI,CAAC,MAAM,CAAC,OAAO,KAAK,YAAY;gBACpC,IAAI,CAAC,MAAM,CAAC,MAAM,KAAK,CAAC,CAAA;IAC5B,CAAC;IAED,UAAU,CAAE,aAAqB,EAAE,kBAA0B;QAC3D,MAAM,KAAK,GAAG,IAAI,CAAC,YAAY,CAAC,OAAO,CAAC,kBAAkB,CAAC,CAAA;QAE3D,IAAI,CAAC,KAAK,EAAE;YACV,GAAG,CAAC,KAAK,CAAC,qCAAqC,GAAG,kBAAkB,CAAC,CAAA;YACrE,MAAM,IAAI,gBAAgB,CAAC,yBAAyB,GAAG,aAAa,GAAG,eAAe,GAAG,kBAAkB,CAAC,CAAA;SAC7G;QAED,IAAI,CAAC,IAAI,CAAC,MAAM,CAAC,eAAe,IAAI,aAAa,KAAK,KAAK,CAAC,OAAO,EAAE;YACnE,GAAG,CAAC,KAAK,CAAC,mFAAmF,EAAE,aAAa,EAAE,kBAAkB,CAAC,CAAA;YACjI,MAAM,IAAI,gBAAgB,CAAC,2DAA2D,GAAG,aAAa,GAAG,sBAAsB,GAAG,kBAAkB,CAAC,CAAA;SACtJ;QAED,OAAO,KAAK,CAAC,OAAO,CAAA;IACtB,CAAC;IAkBD,KAAK,CAAC,gBAAgB,CAAE,aAAqB,EAAE,YAAkC;QAC/E,MAAM,EACJ,MAAM,EACN,kBAAkB,EAClB,SAAS,EACT,WAAW,EACX,IAAI,EACL,GAAG,YAAY,CAAA;QAEhB,GAAG,CAAC,KAAK,CACP,+EAA+E,EAC/E,aAAa,EAAE,MAAM,EAAE,WAAW,CACnC,CAAA;QAED,IAAI,WAAW,CAAC,MAAM,GAAG,CAAC,EAAE;YAC1B,MAAM,IAAI,kBAAkB,CAAC,sBAAsB,CAAC,CAAA;SACrD;QAED,MAAM,OAAO,GAAG,IAAI,CAAC,UAAU,CAAC,aAAa,EAAE,WAAW,CAAC,CAAA;QAE3D,GAAG,CAAC,KAAK,CAAC,iCAAiC,EAAE,OAAO,CAAC,CAAA;QAErD,MAAM,IAAI,GAAG,MAAM,IAAI,CAAC,OAAO,CAAC,OAAO,CAAC,aAAa,EAAE,OAAO,CAAC,CAAA;QAE/D,GAAG,CAAC,KAAK,CAAC,gCAAgC,EAAE,IAAI,CAAC,CAAA;QAEjD,IAAI,CAAC,wBAAwB,CAAC,OAAO,CAAC,CAAA;QAEtC,MAAM,UAAU,GAAG,IAAI,sBAAS,CAAC,MAAM,CAAC,CAAC,KAAK,CAAC,IAAI,CAAC,CAAC,YAAY,CAAC,sBAAS,CAAC,WAAW,CAAC,CAAA;QAExF,OAAO;YACL,OAAO;YACP,aAAa,EAAE;gBACb,MAAM,EAAE,UAAU,CAAC,QAAQ,EAAE;gBAC7B,SAAS,EAAE,IAAI,CAAC,qBAAqB,CAAC,SAAS,CAAC;gBAChD,kBAAkB;gBAClB,WAAW;gBACX,IAAI;aACL;SACF,CAAA;IACH,CAAC;IAED,qBAAqB,CAAE,YAAkB;QACvC,IAAI,CAAC,YAAY,EAAE;YACjB,MAAM,IAAI,SAAS,CAAC,8BAA8B,CAAC,CAAA;SACpD;QACD,MAAM,gBAAgB,GAAG,YAAY,CAAC,OAAO,EAAE,CAAA;QAE/C,IAAI,gBAAgB,GAAG,IAAI,CAAC,GAAG,EAAE,EAAE;YACjC,MAAM,IAAI,wBAAwB,CAAC,oDAAoD,GAAG,YAAY,CAAC,WAAW,EAAE,GAAG,eAAe,GAAG,CAAC,IAAI,IAAI,EAAE,CAAC,WAAW,EAAE,CAAC,CAAC,CAAA;SACrK;QAID,MAAM,qBAAqB,GAAG,IAAI,CAAC,GAAG,CAAC,gBAAgB,GAAG,IAAI,CAAC,MAAM,CAAC,gBAAgB,EAAE,IAAI,CAAC,GAAG,EAAE,GAAG,IAAI,CAAC,MAAM,CAAC,WAAW,CAAC,CAAA;QAE7H,IAAI,CAAC,qBAAqB,GAAG,IAAI,CAAC,GAAG,EAAE,CAAC,GAAG,IAAI,CAAC,MAAM,CAAC,gBAAgB,EAAE;YACvE,MAAM,IAAI,wBAAwB,CAAC,2EAA2E,GAAG,YAAY,CAAC,WAAW,EAAE,GAAG,wBAAwB,GAAG,CAAC,IAAI,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,GAAG,CAAC,GAAG,IAAI,CAAC,MAAM,CAAC,gBAAgB,CAAC,CAAC,WAAW,EAAE,CAAC,GAAG,eAAe,GAAG,CAAC,IAAI,IAAI,EAAE,CAAC,WAAW,EAAE,CAAC,CAAC,CAAA;SACjS;QAED,OAAO,IAAI,IAAI,CAAC,qBAAqB,CAAC,CAAA;IACxC,CAAC;IAED,wBAAwB,CAAE,OAAe;QACvC,IAAI,CAAC,IAAI,CAAC,QAAQ,CAAC,SAAS,CAAC,OAAO,CAAC,CAAC,WAAW,EAAE,EAAE;YACnD,MAAM,IAAI,oBAAoB,CAAC,oCAAoC,GAAG,OAAO,CAAC,CAAA;SAC/E;IACH,CAAC;CACF;AAvHD,+BAuHC","sourcesContent":["import BigNumber from 'bignumber.js'\nimport Accounts from './accounts'\nimport RoutingTable from './routing-table'\nimport RateBackend from './rate-backend'\nimport Config from './config'\nimport reduct = require('reduct')\nimport * as IlpPacket from 'ilp-packet'\nimport { create as createLogger } from '../common/log'\nconst log = createLogger('route-builder')\nconst {\n InsufficientTimeoutError,\n InvalidPacketError,\n PeerUnreachableError,\n UnreachableError\n} = IlpPacket.Errors\n\nexport default class RouteBuilder {\n protected accounts: Accounts\n protected routingTable: RoutingTable\n protected backend: RateBackend\n protected config: Config\n\n protected isTrivialRate: boolean\n\n constructor (deps: reduct.Injector) {\n this.accounts = deps(Accounts)\n this.routingTable = deps(RoutingTable)\n this.backend = deps(RateBackend)\n this.config = deps(Config)\n\n this.isTrivialRate =\n this.config.backend === 'one-to-one' &&\n this.config.spread === 0\n }\n\n getNextHop (sourceAccount: string, destinationAccount: string) {\n const route = this.routingTable.resolve(destinationAccount)\n\n if (!route) {\n log.debug('no route found. destinationAccount=' + destinationAccount)\n throw new UnreachableError('no route found. source=' + sourceAccount + ' destination=' + destinationAccount)\n }\n\n if (!this.config.reflectPayments && sourceAccount === route.nextHop) {\n log.debug('refusing to route payments back to sender. sourceAccount=%s destinationAccount=%s', sourceAccount, destinationAccount)\n throw new UnreachableError('refusing to route payments back to sender. sourceAccount=' + sourceAccount + ' destinationAccount=' + destinationAccount)\n }\n\n return route.nextHop\n }\n\n /**\n * @typedef {Object} NextHopPacketInfo\n * @property {string} nextHop Address of the next peer to forward the packet to\n * @property {Buffer} nextHopPacket Outgoing packet\n */\n\n /**\n * Get next ILP prepare packet.\n *\n * Given a previous ILP prepare packet, returns the next ILP prepare packet in\n * the chain.\n *\n * @param {string} sourceAccount ILP address of our peer who sent us the packet\n * @param {IlpPrepare} sourcePacket (Parsed packet that we received\n * @returns {NextHopPacketInfo} Account and packet for next hop\n */\n async getNextHopPacket (sourceAccount: string, sourcePacket: IlpPacket.IlpPrepare) {\n const {\n amount,\n executionCondition,\n expiresAt,\n destination,\n data\n } = sourcePacket\n\n log.trace(\n 'constructing next hop packet. sourceAccount=%s sourceAmount=%s destination=%s',\n sourceAccount, amount, destination\n )\n\n if (destination.length < 1) {\n throw new InvalidPacketError('missing destination.')\n }\n\n const nextHop = this.getNextHop(sourceAccount, destination)\n\n log.trace('determined next hop. nextHop=%s', nextHop)\n\n const rate = await this.backend.getRate(sourceAccount, nextHop)\n\n log.trace('determined local rate. rate=%s', rate)\n\n this._verifyPluginIsConnected(nextHop)\n\n const nextAmount = new BigNumber(amount).times(rate).integerValue(BigNumber.ROUND_FLOOR)\n\n return {\n nextHop,\n nextHopPacket: {\n amount: nextAmount.toString(),\n expiresAt: this._getDestinationExpiry(expiresAt),\n executionCondition,\n destination,\n data\n }\n }\n }\n\n _getDestinationExpiry (sourceExpiry: Date) {\n if (!sourceExpiry) {\n throw new TypeError('source expiry must be a Date')\n }\n const sourceExpiryTime = sourceExpiry.getTime()\n\n if (sourceExpiryTime < Date.now()) {\n throw new InsufficientTimeoutError('source transfer has already expired. sourceExpiry=' + sourceExpiry.toISOString() + ' currentTime=' + (new Date().toISOString()))\n }\n\n // We will set the next transfer's expiry based on the source expiry and our\n // minMessageWindow, but cap it at our maxHoldTime.\n const destinationExpiryTime = Math.min(sourceExpiryTime - this.config.minMessageWindow, Date.now() + this.config.maxHoldTime)\n\n if ((destinationExpiryTime - Date.now()) < this.config.minMessageWindow) {\n throw new InsufficientTimeoutError('source transfer expires too soon to complete payment. actualSourceExpiry=' + sourceExpiry.toISOString() + ' requiredSourceExpiry=' + (new Date(Date.now() + 2 * this.config.minMessageWindow).toISOString()) + ' currentTime=' + (new Date().toISOString()))\n }\n\n return new Date(destinationExpiryTime)\n }\n\n _verifyPluginIsConnected (account: string) {\n if (!this.accounts.getPlugin(account).isConnected()) {\n throw new PeerUnreachableError('no connection to account. account=' + account)\n }\n }\n}\n"]} |