From 1329926da1275662148b94182764129134341dbf Mon Sep 17 00:00:00 2001 From: Ezequiel Echeveste Date: Wed, 28 Sep 2022 16:46:50 -0300 Subject: [PATCH 1/2] Initialize Project --- .gitignore | 3 + Dockerfile | 22 + index.ts | 74 + package-lock.json | 1866 +++++++++++++++++ package.json | 36 + .../middlewares/error-handler.middleware.ts | 21 + src/api/routes/transaction.routes.ts | 45 + src/common/dtos.ts | 14 + src/common/errors.ts | 31 + src/config/app.config.ts | 11 + src/config/db.config.ts | 10 + src/config/smartContracts.config.ts | 12 + src/db/db.ts | 21 + src/db/models/abi.model.ts | 14 + src/db/models/model.interface.ts | 16 + src/db/models/transaction.model.ts | 34 + src/db/repositories/abi.repository.ts | 20 + src/db/repositories/repositories.interface.ts | 12 + src/db/repositories/transaction.repository.ts | 28 + src/di-container.ts | 95 + src/services/files.service.ts | 23 + src/services/logger.service.ts | 50 + src/services/services.interface.ts | 18 + src/services/transaction.service.ts | 62 + .../abi/abiProvider.interface.ts | 8 + src/smartContract/abi/abiProvider.ts | 28 + src/smartContract/abi/etherscanProvider.ts | 16 + src/smartContract/abi/snowtraceProvider.ts | 30 + src/smartContract/smartContract.interface.ts | 24 + src/smartContract/smartContract.service.ts | 138 ++ src/workers/contractConsumer.interface.ts | 3 + src/workers/contractConsumer.ts | 114 + tsconfig.json | 104 + 33 files changed, 3003 insertions(+) create mode 100644 .gitignore create mode 100644 Dockerfile create mode 100644 index.ts create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 src/api/middlewares/error-handler.middleware.ts create mode 100644 src/api/routes/transaction.routes.ts create mode 100644 src/common/dtos.ts create mode 100644 src/common/errors.ts create mode 100644 src/config/app.config.ts create mode 100644 src/config/db.config.ts create mode 100644 src/config/smartContracts.config.ts create mode 100644 src/db/db.ts create mode 100644 src/db/models/abi.model.ts create mode 100644 src/db/models/model.interface.ts create mode 100644 src/db/models/transaction.model.ts create mode 100644 src/db/repositories/abi.repository.ts create mode 100644 src/db/repositories/repositories.interface.ts create mode 100644 src/db/repositories/transaction.repository.ts create mode 100644 src/di-container.ts create mode 100644 src/services/files.service.ts create mode 100644 src/services/logger.service.ts create mode 100644 src/services/services.interface.ts create mode 100644 src/services/transaction.service.ts create mode 100644 src/smartContract/abi/abiProvider.interface.ts create mode 100644 src/smartContract/abi/abiProvider.ts create mode 100644 src/smartContract/abi/etherscanProvider.ts create mode 100644 src/smartContract/abi/snowtraceProvider.ts create mode 100644 src/smartContract/smartContract.interface.ts create mode 100644 src/smartContract/smartContract.service.ts create mode 100644 src/workers/contractConsumer.interface.ts create mode 100644 src/workers/contractConsumer.ts create mode 100644 tsconfig.json diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..c27e9ba --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +node_modules +build +.env \ No newline at end of file diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..ae3793e --- /dev/null +++ b/Dockerfile @@ -0,0 +1,22 @@ +FROM node:12.18-alpine as builder +RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app +WORKDIR /home/node/app +COPY package*.json ./ +RUN npm config set unsafe-perm true +RUN npm install -g typescript +RUN npm install -g ts-node +USER node +RUN npm install +COPY --chown=node:node . . +RUN npm run build + +FROM node:12.18-alpine +RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app +WORKDIR /home/node/app +COPY package*.json ./ +USER node +RUN npm install --production +COPY --from=builder /home/node/app/build ./build +COPY --chown=node:node .env . +EXPOSE 8000 +CMD [ "node", "build/index.js" ] \ No newline at end of file diff --git a/index.ts b/index.ts new file mode 100644 index 0000000..1ee4429 --- /dev/null +++ b/index.ts @@ -0,0 +1,74 @@ +import express, { Express, Request, Response } from "express"; +import dotenv from "dotenv"; +import cors from "cors"; +import helmet from "helmet"; +import bodyParser from "body-parser"; +import morgan from "morgan"; +import fs from "fs"; +import path from "path"; + +import diContainer from "./src/di-container"; +import { IContractConsumer } from "./src/workers/contractConsumer.interface"; +import { transactionRoutes } from "./src/api/routes/transaction.routes"; +import { initDb } from "./src/db/db"; +import errorHandler from "./src/api/middlewares/error-handler.middleware"; +import AppConfig from "./src/config/app.config"; +import swaggerUi from "swagger-ui-express"; + +dotenv.config(); + +var accessLogStream = fs.createWriteStream( + path.join(path.resolve("./"), "access.log"), + { + flags: "a", + } +); + +const app: Express = express(); + +app.use(bodyParser.json()); +app.use(bodyParser.urlencoded({ extended: true })); + +app.use(helmet()); +app.use(cors()); + +//Using logger middleware +app.use(morgan("combined", { stream: accessLogStream })); + +app.use(transactionRoutes); +app.use(errorHandler); + +//Initialize DB +initDb(); + +app.get("/health", (req: Request, res: Response) => { + res.send("Server is running ok"); +}); + +const server = app.listen(AppConfig.PORT, () => { + console.log(`Server is running at https://localhost:${AppConfig.PORT}`); +}); + +//Start Consumer +diContainer.get("IContractConsumer").start(); + +app.use( + "/docs", + swaggerUi.serve, + swaggerUi.setup(undefined, { + swaggerOptions: { + url: "./swagger.json", + }, + }) +); + +//Todo: Move this to termination signals. +process.on("exit", () => { + console.log("Server is shutting down"); + server.close(); +}); + +process.on("SIGINT", () => { + console.log("Server is shutting down"); + server.close(); +}); diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..7c1827a --- /dev/null +++ b/package-lock.json @@ -0,0 +1,1866 @@ +{ + "name": "eze_challenge", + "version": "1.0.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "@ethersproject/abi": { + "version": "5.7.0", + "resolved": "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.7.0.tgz", + "integrity": "sha512-351ktp42TiRcYB3H1OP8yajPeAQstMW/yCFokj/AthP9bLHzQFPlOrxOcwYEDkUAICmOHljvN4K39OMTMUa9RA==", + "requires": { + "@ethersproject/address": "^5.7.0", + "@ethersproject/bignumber": "^5.7.0", + "@ethersproject/bytes": "^5.7.0", + "@ethersproject/constants": "^5.7.0", + "@ethersproject/hash": "^5.7.0", + "@ethersproject/keccak256": "^5.7.0", + "@ethersproject/logger": "^5.7.0", + "@ethersproject/properties": "^5.7.0", + "@ethersproject/strings": "^5.7.0" + } + }, + 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"@types/mongoose": "^5.11.97", + "@types/morgan": "^1.9.3", + "@types/node": "^14.18.30", + "concurrently": "^7.4.0", + "nodemon": "^2.0.20", + "typescript": "^4.8.3" + } +} diff --git a/src/api/middlewares/error-handler.middleware.ts b/src/api/middlewares/error-handler.middleware.ts new file mode 100644 index 0000000..f2ea8f2 --- /dev/null +++ b/src/api/middlewares/error-handler.middleware.ts @@ -0,0 +1,21 @@ +import { Request, Response, NextFunction } from "express"; +import { CustomError } from "../../common/errors"; + +function handleError( + err: TypeError | CustomError, + req: Request, + res: Response, + next: NextFunction +) { + let customError = err; + + if (!(err instanceof CustomError)) { + customError = new CustomError( + "Something unexpetedly happens. Please try again later." + ); + } + + res.status((customError as CustomError).status).send(customError); +} + +export default handleError; diff --git a/src/api/routes/transaction.routes.ts b/src/api/routes/transaction.routes.ts new file mode 100644 index 0000000..770a921 --- /dev/null +++ b/src/api/routes/transaction.routes.ts @@ -0,0 +1,45 @@ +import { Request, Response, NextFunction } from "express"; +import express from "express"; +import diContainer from "../../di-container"; +import { ITransactionService } from "../../services/services.interface"; + +const router = express.Router(); + +const prefix = "/transaction"; + +router.get( + `${prefix}/hash/:hash`, + async (req: Request, res: Response, next: NextFunction) => { + try { + const hash = req.params.hash; + const transactionService = diContainer.get( + "ITransactionService" + ); + + const response = await transactionService.getTransactionByHash( + String(hash) + ); + return res.status(200).json(response); + } catch (err) { + next(err); + } + } +); + +router.get( + `${prefix}`, + async (req: Request, res: Response, next: NextFunction) => { + try { + const transactionService = diContainer.get( + "ITransactionService" + ); + + const response = await transactionService.getAll(); + return res.status(200).json(response); + } catch (err) { + next(err); + } + } +); + +export { router as transactionRoutes }; diff --git a/src/common/dtos.ts b/src/common/dtos.ts new file mode 100644 index 0000000..6325dff --- /dev/null +++ b/src/common/dtos.ts @@ -0,0 +1,14 @@ +export interface IAbiDto { + address: String; + content: String; +} + +export interface ITransactionDto { + transactionHash: String; + from: String; + to: String; + amountIn: Number; + amountOutMin: Number; + deadline: Number; + path: String[]; +} diff --git a/src/common/errors.ts b/src/common/errors.ts new file mode 100644 index 0000000..cb0d209 --- /dev/null +++ b/src/common/errors.ts @@ -0,0 +1,31 @@ +export const Errors = { + NOT_FOUND: "Not Found", + INTERNAL_ERROR: "Internal Error", +}; + +export class CustomError { + message!: string; + status!: number; + additionalInfo!: any; + + constructor(message: string, status: number = 500, additionalInfo: any = {}) { + this.message = message; + this.status = status; + this.additionalInfo = additionalInfo; + } +} + +export class NotFoundError extends CustomError { + constructor(additionalInfo: any = {}) { + super(Errors.NOT_FOUND); + this.status = 404; + this.additionalInfo = additionalInfo; + } +} + +export class InternalError extends CustomError { + constructor(message?: string, additionalInfo: any = {}) { + super(message || Errors.INTERNAL_ERROR); + this.additionalInfo = additionalInfo; + } +} diff --git a/src/config/app.config.ts b/src/config/app.config.ts new file mode 100644 index 0000000..00a6eb1 --- /dev/null +++ b/src/config/app.config.ts @@ -0,0 +1,11 @@ +import dotenv from "dotenv"; +dotenv.config(); + +const AppConfig = { + InternalLogFile: "internal.log", + AvaxAddress: String(process.env.AVAX_CONTRACT_ADDRESS), + PORT: String(process.env.PORT), + EnableConsumer: process.env.ENABLE_CONSUMER === "true", +}; + +export default AppConfig; diff --git a/src/config/db.config.ts b/src/config/db.config.ts new file mode 100644 index 0000000..4cc17ee --- /dev/null +++ b/src/config/db.config.ts @@ -0,0 +1,10 @@ +import dotenv from "dotenv"; +dotenv.config(); + +const DbConfig = { + DB_HOST: String(process.env.MONGODB_HOST), + DB_USER: String(process.env.MONGODB_USER), + DB_PASSWORD: String(process.env.MONGODB_PASSWORD), +}; + +export default DbConfig; diff --git a/src/config/smartContracts.config.ts b/src/config/smartContracts.config.ts new file mode 100644 index 0000000..eb84754 --- /dev/null +++ b/src/config/smartContracts.config.ts @@ -0,0 +1,12 @@ +import dotenv from "dotenv"; +dotenv.config(); + +const SmartContractConfig = { + AVALANCHE_NETWORK: String(process.env.AVALANCHE_NETWORK), + JOE_DOE_CONTRACT_ADDRESS: String(process.env.JOE_DOE_CONTRACT_ADDRESS), + AVAX_CONTRACT_ADDRESS: String(process.env.AVAX_CONTRACT_ADDRESS), + SNOWTRACE_API: String(process.env.SNOWTRACE_API), + SNOWTRACE_API_KEY: String(process.env.SNOWTRACE_API_KEY), +}; + +export default SmartContractConfig; diff --git a/src/db/db.ts b/src/db/db.ts new file mode 100644 index 0000000..699afe0 --- /dev/null +++ b/src/db/db.ts @@ -0,0 +1,21 @@ +import mongoose from "mongoose"; +import DbConfig from "../config/db.config"; +import diContainer from "../../src/di-container"; +import { ILoggerService } from "../services/services.interface"; + +export const initDb = () => { + return mongoose + .connect(String(DbConfig.DB_HOST), { + user: DbConfig.DB_USER, + pass: DbConfig.DB_PASSWORD, + }) + .then(() => { + diContainer.get("ILoggerService").info("Connected to DB"); + }) + .catch((error) => { + diContainer + .get("ILoggerService") + .error("Error connecting to DB"); + process.exit(1); + }); +}; diff --git a/src/db/models/abi.model.ts b/src/db/models/abi.model.ts new file mode 100644 index 0000000..7d3fdbe --- /dev/null +++ b/src/db/models/abi.model.ts @@ -0,0 +1,14 @@ +import mongoose from "mongoose"; + +const abiSchema = new mongoose.Schema({ + address: { + type: String, + required: true, + }, + content: { + type: String, + required: true, + }, +}); + +export default mongoose.model("Abi", abiSchema); diff --git a/src/db/models/model.interface.ts b/src/db/models/model.interface.ts new file mode 100644 index 0000000..ee53fee --- /dev/null +++ b/src/db/models/model.interface.ts @@ -0,0 +1,16 @@ +import { Document } from "mongoose"; + +export interface ITransaction extends Document { + transactionHash: String; + from: String; + to: String; + amountIn: Number; + amountOutMin: Number; + deadline: Number; + path: String[]; +} + +export interface IAbi extends Document { + address: String; + content: String; +} diff --git a/src/db/models/transaction.model.ts b/src/db/models/transaction.model.ts new file mode 100644 index 0000000..b7d2b3b --- /dev/null +++ b/src/db/models/transaction.model.ts @@ -0,0 +1,34 @@ +import mongoose from "mongoose"; + +const transactionSchema = new mongoose.Schema({ + transactionHash: { + type: String, + required: true, + }, + from: { + type: String, + required: true, + }, + to: { + type: String, + required: true, + }, + amountIn: { + type: Number, + required: true, + }, + amountOutMin: { + type: Number, + required: true, + }, + deadline: { + type: Number, + required: true, + }, + path: { + type: [String], + required: true, + }, +}); + +export default mongoose.model("Transaction", transactionSchema); diff --git a/src/db/repositories/abi.repository.ts b/src/db/repositories/abi.repository.ts new file mode 100644 index 0000000..2f44454 --- /dev/null +++ b/src/db/repositories/abi.repository.ts @@ -0,0 +1,20 @@ +import { inject, injectable } from "inversify"; +import { IAbiRepository } from "./repositories.interface"; +import Abi from "../models/abi.model"; +import { IAbiDto } from "../../common/dtos"; + +@injectable() +export default class AbiRepository implements IAbiRepository { + constructor() {} + + async create(data: IAbiDto): Promise { + const newAbi = new Abi(data); + await newAbi.save(); + } + + async getAbi(address: string): Promise { + return Abi.findOne({ + address, + }); + } +} diff --git a/src/db/repositories/repositories.interface.ts b/src/db/repositories/repositories.interface.ts new file mode 100644 index 0000000..9c607f9 --- /dev/null +++ b/src/db/repositories/repositories.interface.ts @@ -0,0 +1,12 @@ +import { IAbiDto, ITransactionDto } from "../../common/dtos"; + +export interface ITransactionRepository { + create(data: ITransactionDto): Promise; + getByTransactionHash(hash: string): Promise; + getAll(): Promise; +} + +export interface IAbiRepository { + create(data: IAbiDto): Promise; + getAbi(address: string): Promise; +} diff --git a/src/db/repositories/transaction.repository.ts b/src/db/repositories/transaction.repository.ts new file mode 100644 index 0000000..37e148b --- /dev/null +++ b/src/db/repositories/transaction.repository.ts @@ -0,0 +1,28 @@ +import { inject, injectable } from "inversify"; +import { ITransactionRepository } from "./repositories.interface"; +import Transaction from "../models/transaction.model"; +import { ITransactionDto } from "../../common/dtos"; + +@injectable() +export default class TransactionRepository implements ITransactionRepository { + constructor() {} + + async create(data: ITransactionDto): Promise { + const newTransaction = new Transaction(data); + const response = await newTransaction.save(); + return response; + } + + async getAll(): Promise { + const response = await Transaction.find(); + return response; + } + + async getByTransactionHash(hash: string): Promise { + const response = await Transaction.findOne({ + transactionHash: hash, + }); + + return response; + } +} diff --git a/src/di-container.ts b/src/di-container.ts new file mode 100644 index 0000000..911ddff --- /dev/null +++ b/src/di-container.ts @@ -0,0 +1,95 @@ +import "reflect-metadata"; +import { Container } from "inversify"; +import { IContractConsumer } from "./workers/contractConsumer.interface"; +import ContractConsumer from "./workers/contractConsumer"; +import { ISmartContractService } from "./smartContract/smartContract.interface"; +import SmartContractService from "./smartContract/smartContract.service"; +import { + IAbiProvider, + IEtherscanProvider, + ISnowtraceProvider, +} from "./smartContract/abi/abiProvider.interface"; +import SnowTraceProvider from "./smartContract/abi/snowtraceProvider"; +import AbiProvider from "./smartContract/abi/abiProvider"; +import EtherScanProvider from "./smartContract/abi/etherscanProvider"; +import TransactionRepository from "./db/repositories/transaction.repository"; +import { + IAbiRepository, + ITransactionRepository, +} from "./db/repositories/repositories.interface"; +import TransactionService from "./services/transaction.service"; +import { + IFilesService, + ILoggerService, + ITransactionService, +} from "./services/services.interface"; +import AbiRepository from "./db/repositories/abi.repository"; +import LoggerService from "./services/logger.service"; +import FilesService from "./services/files.service"; + +export class DiContainer { + public diContainer: Container; + + public configure(): void { + this.diContainer = new Container(); + + //Register Repositories + this.diContainer + .bind("ITransactionRepository") + .to(TransactionRepository) + .inSingletonScope(); + + this.diContainer + .bind("IAbiRepository") + .to(AbiRepository) + .inSingletonScope(); + + //Register Services + this.diContainer + .bind("ISmartContractService") + .to(SmartContractService) + .inSingletonScope(); + + this.diContainer + .bind("ITransactionService") + .to(TransactionService) + .inSingletonScope(); + + this.diContainer + .bind("ILoggerService") + .to(LoggerService) + .inSingletonScope(); + + this.diContainer + .bind("IFilesService") + .to(FilesService) + .inSingletonScope(); + + //Register Worker + this.diContainer + .bind("IContractConsumer") + .to(ContractConsumer) + .inSingletonScope(); + + //Register External Providers + this.diContainer + .bind("IAbiProvider") + .to(AbiProvider) + .inSingletonScope(); + + this.diContainer + .bind("ISnowtraceProvider") + .to(SnowTraceProvider) + .inSingletonScope(); + + this.diContainer + .bind("IEtherscanProvider") + .to(EtherScanProvider) + .inSingletonScope(); + } +} + +const diContainer = new DiContainer(); +diContainer.configure(); + +export default diContainer.diContainer; diff --git a/src/services/files.service.ts b/src/services/files.service.ts new file mode 100644 index 0000000..3eacf33 --- /dev/null +++ b/src/services/files.service.ts @@ -0,0 +1,23 @@ +import { appendFile, createWriteStream, existsSync, WriteStream } from "fs"; + +import { inject, injectable } from "inversify"; +import { IFilesService, ILoggerService } from "./services.interface"; + +@injectable() +export default class FilesService implements IFilesService { + constructor( + @inject("ILoggerService") + private readonly loggerService: ILoggerService + ) {} + + async writeIfNotExists(path: string, content: string): Promise { + const existsPath = await existsSync(path); + if (!existsPath) { + appendFile(path, content, () => { + this.loggerService.info(`Created and copy new file in: ${path}`); + }); + } else { + this.loggerService.info(`File already exists in: ${path}`); + } + } +} diff --git a/src/services/logger.service.ts b/src/services/logger.service.ts new file mode 100644 index 0000000..6485bdf --- /dev/null +++ b/src/services/logger.service.ts @@ -0,0 +1,50 @@ +import fs from "fs"; +import path from "path"; + +import { injectable } from "inversify"; +import { ILoggerService } from "./services.interface"; +import AppConfig from "../config/app.config"; + +@injectable() +export default class LoggerService implements ILoggerService { + logStream: fs.WriteStream; + constructor() { + this.logStream = fs.createWriteStream( + path.join(path.resolve("./"), AppConfig.InternalLogFile), + { + flags: "a", + } + ); + } + + async info(message: string, data?: Object | string): Promise { + try { + const sdata = data ? JSON.stringify(data) : ""; + console.log(message, sdata); + } catch { + console.log(message, data); + } + } + + async warn(message: string, data?: Object | string): Promise { + try { + const sdata = data ? JSON.stringify(data) : ""; + console.warn(message, sdata); + } catch { + console.log(message, data); + } + } + + async error(message: string, data?: Object | string): Promise { + try { + const sdata = data ? JSON.stringify(data) : ""; + console.error(message, sdata); + const logDate = new Date().toISOString(); + const chunk = `${logDate} - ${sdata} \n`; + this.logStream.write(chunk); + } catch { + console.error(data); + console.error("Cannot write log to file", data); + } + } +} diff --git a/src/services/services.interface.ts b/src/services/services.interface.ts new file mode 100644 index 0000000..fdc32c0 --- /dev/null +++ b/src/services/services.interface.ts @@ -0,0 +1,18 @@ +import fs from "fs"; +import { ITransactionDto } from "../common/dtos"; + +export interface ITransactionService { + getTransactionByHash(hash: string): Promise; + getAll(): Promise; + create(data: ITransactionDto): Promise; +} + +export interface IFilesService { + writeIfNotExists(path: string, content: string): Promise; +} + +export interface ILoggerService { + info(message: string, additionalInfo?: Object | string): void; + warn(message: string, additionalInfo?: Object | string): void; + error(message: string, additionalInfo?: Object | string): void; +} diff --git a/src/services/transaction.service.ts b/src/services/transaction.service.ts new file mode 100644 index 0000000..47c09bc --- /dev/null +++ b/src/services/transaction.service.ts @@ -0,0 +1,62 @@ +import { inject, injectable } from "inversify"; +import { ILoggerService, ITransactionService } from "./services.interface"; +import { ISmartContractService } from "../smartContract/smartContract.interface"; +import { ITransactionRepository } from "../db/repositories/repositories.interface"; +import SmartContractConfig from "../config/smartContracts.config"; +import { ITransactionDto } from "../common/dtos"; +import { InternalError, NotFoundError } from "../common/errors"; + +@injectable() +export default class TransactionService implements ITransactionService { + constructor( + @inject("ILoggerService") + private readonly loggerService: ILoggerService, + @inject("ISmartContractService") + private readonly smartContractService: ISmartContractService, + @inject("ITransactionRepository") + private readonly transactionRepository: ITransactionRepository + ) {} + + async create(data: ITransactionDto): Promise { + try { + this.transactionRepository.create(data); + this.loggerService.info("Transaction created"); + } catch (error) { + throw new InternalError("Cannot create transaction", error); + } + + return; + } + + async getAll(): Promise { + try { + return this.transactionRepository.getAll(); + } catch (error) { + throw new InternalError("Cannot getall transactions", error); + } + } + + async getTransactionByHash(hash: string): Promise { + try { + const trx = await this.transactionRepository.getByTransactionHash(hash); + if (trx) { + return trx; + } else { + const transaction = await this.smartContractService.getAvaxTransaction( + SmartContractConfig.JOE_DOE_CONTRACT_ADDRESS, + hash + ); + + if (!transaction) { + throw new NotFoundError({ hash }); + } + + return await this.transactionRepository.create(transaction); + } + } catch (error) { + const msg = "Cannot Get Transaction By Hash"; + this.loggerService.error(msg); + throw new InternalError(msg, error); + } + } +} diff --git a/src/smartContract/abi/abiProvider.interface.ts b/src/smartContract/abi/abiProvider.interface.ts new file mode 100644 index 0000000..b8d2f04 --- /dev/null +++ b/src/smartContract/abi/abiProvider.interface.ts @@ -0,0 +1,8 @@ +import { ContractInterface } from "ethers"; + +export interface IAbiProvider { + getAbi(address: string): Promise; +} + +export interface ISnowtraceProvider extends IAbiProvider {} +export interface IEtherscanProvider extends IAbiProvider {} diff --git a/src/smartContract/abi/abiProvider.ts b/src/smartContract/abi/abiProvider.ts new file mode 100644 index 0000000..49778e9 --- /dev/null +++ b/src/smartContract/abi/abiProvider.ts @@ -0,0 +1,28 @@ +import { ContractInterface } from "ethers"; +import { inject, injectable } from "inversify"; +import { ILoggerService } from "../../services/services.interface"; +import { IAbiProvider } from "./abiProvider.interface"; + +@injectable() +export default class AbiProvider implements IAbiProvider { + constructor( + @inject("ILoggerService") + private readonly loggerService: ILoggerService, + @inject("ISnowtraceProvider") + private readonly snowTraceProvider: IAbiProvider + ) {} + + async getAbi(address: string): Promise { + try { + //Todo: If snowtrace fails, try to initialize etherscan and get abi + const abi = await this.snowTraceProvider.getAbi(address); + this.loggerService.info( + `Abi for address ${address} obtained from Snowtrace` + ); + return abi; + } catch (error: any) { + this.loggerService.error("Snow trace provider fails", error); + throw error; + } + } +} diff --git a/src/smartContract/abi/etherscanProvider.ts b/src/smartContract/abi/etherscanProvider.ts new file mode 100644 index 0000000..ba1bce2 --- /dev/null +++ b/src/smartContract/abi/etherscanProvider.ts @@ -0,0 +1,16 @@ +/* istanbul ignore file */ + +import { ContractInterface } from "ethers"; +import { inject, injectable } from "inversify"; +import { InternalError } from "../../common/errors"; +import { IAbiProvider } from "./abiProvider.interface"; + +@injectable() +export default class EtherScanProvider implements IAbiProvider { + constructor() {} + + async getAbi(address: string): Promise { + //Service not implemented + throw new InternalError("Service not implemented"); + } +} diff --git a/src/smartContract/abi/snowtraceProvider.ts b/src/smartContract/abi/snowtraceProvider.ts new file mode 100644 index 0000000..dd73836 --- /dev/null +++ b/src/smartContract/abi/snowtraceProvider.ts @@ -0,0 +1,30 @@ +/* istanbul ignore file */ + +import axios from "axios"; +import { ContractInterface } from "ethers"; +import { inject, injectable } from "inversify"; +import SmartContractConfig from "../../config/smartContracts.config"; +import { IAbiProvider } from "./abiProvider.interface"; + +@injectable() +export default class SnowTraceProvider implements IAbiProvider { + constructor() {} + + async getAbi(address: string): Promise { + try { + const url = `${SmartContractConfig.SNOWTRACE_API}?module=contract&action=getabi&address=${address}&apikey=${SmartContractConfig.SNOWTRACE_API_KEY}`; + const { data } = await axios.get(url); + + const jsonResponse = JSON.parse(data.result); + return jsonResponse; + } catch (error) { + if (axios.isAxiosError(error)) { + console.log("error message: ", error.message); + throw error.message; + } else { + console.log("unexpected error: ", error); + throw "An unexpected error occurred"; + } + } + } +} diff --git a/src/smartContract/smartContract.interface.ts b/src/smartContract/smartContract.interface.ts new file mode 100644 index 0000000..e4de1c6 --- /dev/null +++ b/src/smartContract/smartContract.interface.ts @@ -0,0 +1,24 @@ +import { Contract, ContractInterface, providers } from "ethers"; +import { Interface } from "ethers/lib/utils"; +import { ITransactionDto } from "../common/dtos"; + +//Create transaction details +export interface ISmartContractService { + startRCPProvider(address: string): Promise; + getAbi(address: string): Promise; + getContract( + address: string, + contractInterface: ContractInterface, + provider: providers.Provider + ): Promise; + getInterface(fragments: string): Promise; + getAvaxTransaction( + addressContract: string, + trxHash: string + ): Promise; +} + +export interface ITransactionResponse { + data: any; + value: any; +} diff --git a/src/smartContract/smartContract.service.ts b/src/smartContract/smartContract.service.ts new file mode 100644 index 0000000..d232353 --- /dev/null +++ b/src/smartContract/smartContract.service.ts @@ -0,0 +1,138 @@ +import { Contract, ContractInterface, ethers, providers } from "ethers"; +import { Interface } from "ethers/lib/utils"; +import { inject, injectable } from "inversify"; +import path from "path"; +import { ITransactionDto } from "../common/dtos"; +import SmartContractConfig from "../config/smartContracts.config"; +import { IAbiRepository } from "../db/repositories/repositories.interface"; +import { IFilesService, ILoggerService } from "../services/services.interface"; +import { IAbiProvider } from "./abi/abiProvider.interface"; +import { ISmartContractService } from "./smartContract.interface"; + +@injectable() +export default class SmartContractService implements ISmartContractService { + avaxProvider: providers.Provider; + + constructor( + @inject("ILoggerService") + private readonly loggerService: ILoggerService, + @inject("IFilesService") + private readonly filesService: IFilesService, + @inject("IAbiProvider") + private readonly abiProvider: IAbiProvider, + @inject("IAbiRepository") + private readonly abiRepository: IAbiRepository + ) {} + + async startRCPProvider(address: string): Promise { + try { + if (!this.avaxProvider) { + this.avaxProvider = new ethers.providers.JsonRpcProvider(address); + this.loggerService.info(`RCP Provider for address ${address} Created`); + } + + this.loggerService.info( + `RCP Provider for address ${address} Obtained from Memory` + ); + return this.avaxProvider; + } catch (error: any) { + this.loggerService.error("Can not startRCPProvider", error); + throw error; + } + } + + async getAbi(address: string): Promise { + try { + const abi = await this.abiRepository.getAbi(address); + this.loggerService.info(`Abi for address ${address} Obtained from DB`); + if (!abi) { + const abiFromProvider = await this.abiProvider.getAbi(address); + this.loggerService.info( + `Abi for address ${address} Obtained from Provider` + ); + + const content = JSON.stringify(abiFromProvider); + + await this.abiRepository.create({ + address, + content, + }); + + const newFilePath = path.join(path.resolve("./"), address); + await this.filesService.writeIfNotExists(`${newFilePath}.txt`, content); + + return abiFromProvider; + } else { + return JSON.parse(String(abi.content)); + } + } catch (error: any) { + this.loggerService.error("Can not get Abi", error); + throw error; + } + } + + async getContract( + address: string, + contractInterface: ContractInterface, + provider: providers.Provider + ): Promise { + try { + return new ethers.Contract(address, contractInterface, provider); + } catch (error: any) { + this.loggerService.error("Can not get Contract", error); + throw error; + } + } + + async getInterface(fragments: string): Promise { + try { + return new ethers.utils.Interface(fragments); + } catch (error: any) { + this.loggerService.error("Can not get Interface", error); + throw error; + } + } + + async getAvaxTransaction( + contractAddress: string, + trxHash: string + ): Promise { + try { + const provider = await this.startRCPProvider( + SmartContractConfig.AVALANCHE_NETWORK + ); + + //check if transaction fails after querying. + const trx = await provider.getTransaction(trxHash); + + const avaxABIContract = await this.getAbi(contractAddress); + + const avaxContract = await this.getContract( + contractAddress, + avaxABIContract, + provider + ); + + let decodedData: any = avaxContract.interface.parseTransaction({ + data: trx.data, + value: trx.value, + }); + + //gather data and create a transaction object. + const transaction: ITransactionDto = { + transactionHash: trxHash, + from: trx.from, + to: trx.to || "", + amountIn: decodedData.args.amountIn, + amountOutMin: decodedData.args.amountOutMin, + deadline: decodedData.args.deadline, + path: decodedData.args.path, + }; + + return transaction; + } catch (error: any) { + this.loggerService.error("Can not get Avax transaction", error); + throw error; + } + } +} diff --git a/src/workers/contractConsumer.interface.ts b/src/workers/contractConsumer.interface.ts new file mode 100644 index 0000000..73bc41a --- /dev/null +++ b/src/workers/contractConsumer.interface.ts @@ -0,0 +1,3 @@ +export interface IContractConsumer { + start(): Promise; +} diff --git a/src/workers/contractConsumer.ts b/src/workers/contractConsumer.ts new file mode 100644 index 0000000..468a061 --- /dev/null +++ b/src/workers/contractConsumer.ts @@ -0,0 +1,114 @@ +/* istanbul ignore file */ + +import { inject, injectable } from "inversify"; +import { + ILoggerService, + ITransactionService, +} from "../services/services.interface"; +import SmartContractConfig from "../config/smartContracts.config"; +import { ISmartContractService } from "../smartContract/smartContract.interface"; +import { IContractConsumer } from "./contractConsumer.interface"; +import { ITransactionDto } from "../common/dtos"; +import AppConfig from "../config/app.config"; + +@injectable() +export default class ContractConsumer implements IContractConsumer { + constructor( + @inject("ILoggerService") + private readonly loggerService: ILoggerService, + @inject("ISmartContractService") + private readonly smartContractService: ISmartContractService, + @inject("ITransactionService") + private readonly transactionService: ITransactionService + ) {} + + avaxContract: any; + + async start(): Promise { + if (!AppConfig.EnableConsumer) { + this.loggerService.warn("Consumer is disabled"); + return; + } + + try { + const network = String(SmartContractConfig.AVALANCHE_NETWORK); + const avaxContractAddress = String( + SmartContractConfig.AVAX_CONTRACT_ADDRESS + ); + const joeDoeContractAddress = String( + SmartContractConfig.JOE_DOE_CONTRACT_ADDRESS + ); + + const provider = await this.smartContractService.startRCPProvider( + network + ); + + const avaxABIContract = await this.smartContractService.getAbi( + avaxContractAddress + ); + + this.avaxContract = await this.smartContractService.getContract( + avaxContractAddress, + avaxABIContract, + provider + ); + + await this.registerEventFor(joeDoeContractAddress); + this.loggerService.info("Consumer Started"); + } catch (error: any) { + this.loggerService.error("Cannot start Consumer", error); + } + } + + async registerEventFor(address: string) { + try { + const listenerAbiContract = await this.smartContractService.getAbi( + address + ); + + const listenerInterface = await this.smartContractService.getInterface( + listenerAbiContract as unknown as string + ); + + const filter = this.avaxContract.filters.Transfer(null, address); + + this.avaxContract.on( + filter, + (from: any, to: any, value: any, event: any) => { + const { transactionHash } = event; + event + .getTransaction(transactionHash) + .then(async (resp: any) => { + this.loggerService.info( + `Listening event for ${address} - ${JSON.stringify(value)}` + ); + let decodedData = listenerInterface.parseTransaction({ + data: resp.data, + value: resp.value, + }); + + const transaction: ITransactionDto = { + from, + to, + transactionHash, + amountIn: decodedData.args.amountIn, + amountOutMin: decodedData.args.amountOutMin, + deadline: decodedData.args.deadline, + path: decodedData.args.path, + }; + + await this.transactionService.create(transaction); + }) + .catch((error: any) => { + this.loggerService.error( + `Cannot parse event for ${address}`, + error + ); + }); + } + ); + } catch (error: any) { + this.loggerService.error("Cannot register Event", error); + } + } +} diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..2adfbd0 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,104 @@ +{ + "compilerOptions": { + /* Visit https://aka.ms/tsconfig to read more about this file */ + + /* Projects */ + // "incremental": true, /* Save .tsbuildinfo files to allow for incremental compilation of projects. */ + // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ + // "tsBuildInfoFile": "./.tsbuildinfo", /* Specify the path to .tsbuildinfo incremental compilation file. */ + // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects. */ + // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ + // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ + + /* Language and Environment */ + "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */ + // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ + // "jsx": "preserve", /* Specify what JSX code is generated. */ + "experimentalDecorators": true, /* Enable experimental support for TC39 stage 2 draft decorators. */ + // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ + // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */ + // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ + // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */ + // "reactNamespace": "", /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */ + // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ + // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ + // "moduleDetection": "auto", /* Control what method is used to detect module-format JS files. */ + + /* Modules */ + "module": "commonjs", /* Specify what module code is generated. */ + // "rootDir": "./", /* Specify the root folder within your source files. */ + // "moduleResolution": "node", /* Specify how TypeScript looks up a file from a given module specifier. */ + // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ + // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ + // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ + // "typeRoots": [], /* Specify multiple folders that act like './node_modules/@types'. */ + // "types": [], /* Specify type package names to be included without being referenced in a source file. */ + // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ + // "moduleSuffixes": [], /* List of file name suffixes to search when resolving a module. */ + // "resolveJsonModule": true, /* Enable importing .json files. */ + // "noResolve": true, /* Disallow 'import's, 'require's or ''s from expanding the number of files TypeScript should add to a project. */ + + /* JavaScript Support */ + // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */ + // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ + // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */ + + /* Emit */ + // "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ + // "declarationMap": true, /* Create sourcemaps for d.ts files. */ + // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ + // "sourceMap": true, /* Create source map files for emitted JavaScript files. */ + // "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */ + "outDir": "./build", /* Specify an output folder for all emitted files. */ + // "removeComments": true, /* Disable emitting comments. */ + // "noEmit": true, /* Disable emitting files from a compilation. */ + // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ + // "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types. */ + // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ + // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ + // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ + // "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ + // "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ + // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ + // "newLine": "crlf", /* Set the newline character for emitting files. */ + // "stripInternal": true, /* Disable emitting declarations that have '@internal' in their JSDoc comments. */ + // "noEmitHelpers": true, /* Disable generating custom helper functions like '__extends' in compiled output. */ + // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ + // "preserveConstEnums": true, /* Disable erasing 'const enum' declarations in generated code. */ + // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ + // "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */ + + /* Interop Constraints */ + // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ + // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ + "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */ + // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ + "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */ + "strictPropertyInitialization": false, + + /* Type Checking */ + "strict": true, /* Enable all strict type-checking options. */ + // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied 'any' type. */ + // "strictNullChecks": true, /* When type checking, take into account 'null' and 'undefined'. */ + // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ + // "strictBindCallApply": true, /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */ + // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ + // "noImplicitThis": true, /* Enable error reporting when 'this' is given the type 'any'. */ + // "useUnknownInCatchVariables": true, /* Default catch clause variables as 'unknown' instead of 'any'. */ + // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ + // "noUnusedLocals": true, /* Enable error reporting when local variables aren't read. */ + // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read. */ + // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ + // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ + // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ + // "noUncheckedIndexedAccess": true, /* Add 'undefined' to a type when accessed using an index. */ + // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ + // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type. */ + // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ + // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ + + /* Completeness */ + // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ + "skipLibCheck": true /* Skip type checking all .d.ts files. */ + } +} From 1734fdb8027a2b1b60faa9407b901cd21c489263 Mon Sep 17 00:00:00 2001 From: Ezequiel Echeveste Date: Wed, 28 Sep 2022 17:04:07 -0300 Subject: [PATCH 2/2] Update ReadMe --- README.md | 62 +++++++++++++++++-------------------------------------- 1 file changed, 19 insertions(+), 43 deletions(-) diff --git a/README.md b/README.md index 889da01..638f6b1 100644 --- a/README.md +++ b/README.md @@ -1,43 +1,19 @@ - -## Cryptologic web3/backend application challenge. - -The main goal of this challenge is to create a backend application writen in nodejs/typescript that consumes, processes and store blockchain data. - -To achieve this, the following items are required. - -- Create a fork of the current repository, once the challenge is done submit a proper PR. -- Instantiate a web3 o etherjs object with an public RPC (in this case we will use Avalanche EVM C-Chain) -- create a MongoDB database connection withing the runtime - -Having this transaction as a starting point [0x508217c172c3cfe006ee9ca5bef621ba11a359461bacfc0494f1449a7d00f443](https://snowtrace.io/tx/0x508217c172c3cfe006ee9ca5bef621ba11a359461bacfc0494f1449a7d00f443) it is required to: - -- Use web3.js or ethers.js proper methods to fetch transaction data details - -- Fetch and save main contract ABI and bytecode and save them into a file and database - -- Understand and parse the event log to show in a básic REST response the decoded events and its parameters - -- Create a basic REST endpoint that once queried saves the parsed data into a MongoDB document. - -- Create a basic REST endpoint to get the previously saved data. - - -Must have: - -- Basic error handling -- Basic README file -- Basic explaination of the work done - -Extra points: -- unit testing -- Docker build - -#### References: - -[Event logs](https://medium.com/mycrypto/understanding-event-logs-on-the-ethereum-blockchain-f4ae7ba50378) - -[Web3 doc](https://web3js.readthedocs.io/en/1.0/web3-eth.html) - -[EthersJS dock](https://docs.ethers.io/v5/) - -[topics & getPastLogs](https://ethereum.stackexchange.com/questions/61585/how-to-setup-topics-for-function-getpastlogs) +## Ezequiel web3/backend application challenge Solution. + +Project Structure + +- Dependency Injection for instanciating classes + - Here we have a di-container that will register, in singleton scope, Services, Repositories and External Providers. Advantage: Responsible for instantiation in one place. +- API + - We have routes and middlewares for the REST API. Inside of API we will find 2 endpoints: + * Get All Transactions (This endpoint has some limitations, returns everything it finds in database. One improvement will be adding pagination and query params. Other improvemnt is to add Json Validation schema for POST methods). + - Middlewares: We have an error handler middleware responsible for capturing and formating errors. +- Services + - We have services to be consumed from API and Workers. + - Services has services.interface responsible for declaring all services contracts. +- Smart Contract Component + - Here we have a package responsible for interacting with Ethereum Network, create contracts and retrieve transaction information from the network. + - We have ABI provider that creates a contract with SmartContractService. ABI provider has 2 providers that get abi information. +- Workers + - Here we register for events. In this case only have the possibility to register event for Joe Doe contract address. Events will be saved to DB in order to be consumed by API + - Further enhancement: Have the possibility to register events for a lot of addresses.