├── src ├── util │ └── users.ts └── server.ts ├── README.md ├── package.json └── tsconfig.json /src/util/users.ts: -------------------------------------------------------------------------------- 1 | interface User { 2 | balance : number 3 | } 4 | 5 | const users : Record = { 6 | 'user1': {balance: 1000}, 7 | 'user2': {balance: 2000}, 8 | 'user3': {balance: 3000} 9 | } 10 | 11 | export default users; -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | to start 2 | npm install 3 | npm run build 4 | npm start 5 | 6 | Postman 7 | 8 | 1.Endpoint 9 | method: Get, url: http://localhost:3000/api/items 10 | Params: {app_id: '730', currency: 'EUR', tradable: true } //option 11 | 12 | 2.Endpoint 13 | method: Post, url:http://localhost:3000/api/purchase 14 | Body {x-www-form-urlencoded}: { 15 | username: 'user1', itemPrice: xx 16 | } -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "skinport-api", 3 | "version": "1.0.0", 4 | "description": "", 5 | "main": "server.js", 6 | "scripts": { 7 | "start": "node dist/server.js", 8 | "build": "tsc" 9 | }, 10 | "author": "", 11 | "license": "MIT", 12 | "dependencies": { 13 | "axios": "^1.7.7", 14 | "body-parser": "^1.20.3", 15 | "express": "^4.21.0" 16 | }, 17 | "devDependencies": { 18 | "@types/express": "^5.0.0", 19 | "@types/node": "^22.7.4", 20 | "typescript": "^5.6.2" 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /src/server.ts: -------------------------------------------------------------------------------- 1 | import express, { Request, Response } from 'express'; 2 | import axios from 'axios'; 3 | import bodyParser from 'body-parser'; 4 | import users from './util/users'; 5 | 6 | const app = express(); 7 | const port: number = 3000; 8 | 9 | app.use(express.json()); 10 | app.use(bodyParser.urlencoded()) 11 | 12 | app.get('/api/items', async (req: Request, res:Response) => { 13 | try{ 14 | const request1 = await axios.get('https://api.skinport.com/v1/items', { 15 | params: { app_id: '730', currency: 'EUR', tradable: true } 16 | }) 17 | const request2 = await axios.get('https://api.skinport.com/v1/items', { 18 | params: { app_id: '730', currency: 'EUR', tradable: false } 19 | }) 20 | 21 | const items = request1.data.map((item_t: any) => { 22 | const result = { 23 | name: item_t.market_hash_name, 24 | price_t: item_t.min_price, 25 | price_nt: 0 26 | } 27 | request2.data.map((item_nt: any) => { 28 | if(item_nt.name == item_t.name) { result.price_nt = item_nt.min_price;} 29 | }) 30 | return result; 31 | }); 32 | 33 | res.json(items); 34 | } catch(err) { 35 | res.status(500).json({ 36 | error:'Internal Server Error' 37 | }) 38 | } 39 | }) 40 | 41 | app.post('/api/purchase', (req: Request, res: Response) => { 42 | const {username, itemPrice} : {username: string, itemPrice: number} = req.body; 43 | 44 | if(!users[username]){ 45 | res.status(404).json({error: "user not found!"}); 46 | } 47 | 48 | if(users[username].balance < itemPrice) { 49 | res.status(400).json({ error: 'Insufficient balance'}); 50 | } 51 | users[username].balance -= itemPrice; 52 | 53 | res.json({ 54 | message:'purchase success!', 55 | balance: users[username].balance 56 | }) 57 | }) 58 | 59 | app.listen(port, () => { 60 | console.log(`server is running on http://localhost:${port}`); 61 | }) -------------------------------------------------------------------------------- /tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | /* Visit https://aka.ms/tsconfig to read more about this file */ 4 | 5 | /* Projects */ 6 | // "incremental": true, /* Save .tsbuildinfo files to allow for incremental compilation of projects. */ 7 | // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ 8 | // "tsBuildInfoFile": "./.tsbuildinfo", /* Specify the path to .tsbuildinfo incremental compilation file. */ 9 | // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects. */ 10 | // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ 11 | // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ 12 | 13 | /* Language and Environment */ 14 | "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */ 15 | // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ 16 | // "jsx": "preserve", /* Specify what JSX code is generated. */ 17 | // "experimentalDecorators": true, /* Enable experimental support for legacy experimental decorators. */ 18 | // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ 19 | // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */ 20 | // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ 21 | // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */ 22 | // "reactNamespace": "", /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */ 23 | // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ 24 | // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ 25 | // "moduleDetection": "auto", /* Control what method is used to detect module-format JS files. */ 26 | 27 | /* Modules */ 28 | "module": "commonjs", /* Specify what module code is generated. */ 29 | "rootDir": "./src", /* Specify the root folder within your source files. */ 30 | // "moduleResolution": "node10", /* Specify how TypeScript looks up a file from a given module specifier. */ 31 | // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ 32 | // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ 33 | // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ 34 | // "typeRoots": [], /* Specify multiple folders that act like './node_modules/@types'. */ 35 | // "types": [], /* Specify type package names to be included without being referenced in a source file. */ 36 | // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ 37 | // "moduleSuffixes": [], /* List of file name suffixes to search when resolving a module. */ 38 | // "allowImportingTsExtensions": true, /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */ 39 | // "resolvePackageJsonExports": true, /* Use the package.json 'exports' field when resolving package imports. */ 40 | // "resolvePackageJsonImports": true, /* Use the package.json 'imports' field when resolving imports. */ 41 | // "customConditions": [], /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */ 42 | // "noUncheckedSideEffectImports": true, /* Check side effect imports. */ 43 | // "resolveJsonModule": true, /* Enable importing .json files. */ 44 | // "allowArbitraryExtensions": true, /* Enable importing files with any extension, provided a declaration file is present. */ 45 | // "noResolve": true, /* Disallow 'import's, 'require's or ''s from expanding the number of files TypeScript should add to a project. */ 46 | 47 | /* JavaScript Support */ 48 | // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */ 49 | // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ 50 | // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */ 51 | 52 | /* Emit */ 53 | // "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ 54 | // "declarationMap": true, /* Create sourcemaps for d.ts files. */ 55 | // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ 56 | // "sourceMap": true, /* Create source map files for emitted JavaScript files. */ 57 | // "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ 58 | // "noEmit": true, /* Disable emitting files from a compilation. */ 59 | // "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. */ 60 | "outDir": "./dist", /* Specify an output folder for all emitted files. */ 61 | // "removeComments": true, /* Disable emitting comments. */ 62 | // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ 63 | // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ 64 | // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ 65 | // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ 66 | // "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ 67 | // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ 68 | // "newLine": "crlf", /* Set the newline character for emitting files. */ 69 | // "stripInternal": true, /* Disable emitting declarations that have '@internal' in their JSDoc comments. */ 70 | // "noEmitHelpers": true, /* Disable generating custom helper functions like '__extends' in compiled output. */ 71 | // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ 72 | // "preserveConstEnums": true, /* Disable erasing 'const enum' declarations in generated code. */ 73 | // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ 74 | 75 | /* Interop Constraints */ 76 | // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ 77 | // "verbatimModuleSyntax": true, /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */ 78 | // "isolatedDeclarations": true, /* Require sufficient annotation on exports so other tools can trivially generate declaration files. */ 79 | // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ 80 | "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */ 81 | // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ 82 | "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */ 83 | 84 | /* Type Checking */ 85 | "strict": true, /* Enable all strict type-checking options. */ 86 | // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied 'any' type. */ 87 | // "strictNullChecks": true, /* When type checking, take into account 'null' and 'undefined'. */ 88 | // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ 89 | // "strictBindCallApply": true, /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */ 90 | // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ 91 | // "strictBuiltinIteratorReturn": true, /* Built-in iterators are instantiated with a 'TReturn' type of 'undefined' instead of 'any'. */ 92 | // "noImplicitThis": true, /* Enable error reporting when 'this' is given the type 'any'. */ 93 | // "useUnknownInCatchVariables": true, /* Default catch clause variables as 'unknown' instead of 'any'. */ 94 | // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ 95 | // "noUnusedLocals": true, /* Enable error reporting when local variables aren't read. */ 96 | // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read. */ 97 | // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ 98 | // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ 99 | // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ 100 | // "noUncheckedIndexedAccess": true, /* Add 'undefined' to a type when accessed using an index. */ 101 | // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ 102 | // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type. */ 103 | // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ 104 | // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ 105 | 106 | /* Completeness */ 107 | // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ 108 | "skipLibCheck": true /* Skip type checking all .d.ts files. */ 109 | } 110 | } 111 | --------------------------------------------------------------------------------