├── src
    ├── web
    │   ├── home.js
    │   ├── helpers.js
    │   ├── main.scss
    │   ├── routes.js
    │   ├── index.js
    │   ├── main.js
    │   └── invoice.js
    ├── common
    │   ├── utils.js
    │   └── validators.js
    ├── contracts
    │   ├── index.js
    │   ├── eth_provider.js
    │   └── abi
    │   │   └── ERC20.json
    ├── server
    │   ├── index.js
    │   ├── jobs
    │   │   ├── callbacks.js
    │   │   └── invoices.js
    │   ├── api_v1.js
    │   ├── server.js
    │   └── invoice
    │   │   └── manager.js
    └── scripts
    │   └── wallets.js
├── .gitignore
├── CHANGELOG.md
├── .babelrc
├── tools
    ├── scripts.webpack.config.js
    └── app.webpack.config.js
├── config
    └── default.cson
├── LICENSE
├── test
    ├── ERC20_ABI.json
    ├── test.js
    └── ERC20.bin
├── package.json
└── README.md


/src/web/home.js:
--------------------------------------------------------------------------------
1 | import { h } from 'hyperapp'
2 | 
3 | export default {
4 |   Init: state => state,
5 |   View: _ => (
6 |     <h1 class="is-1 title">DECENTRAPAY</h1>
7 |   )
8 | }
9 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
 1 | *.sw?
 2 | *.log
 3 | *.orig
 4 | /.tmp
 5 | /node_modules
 6 | /dist
 7 | npm-debug.*
 8 | static/runtime*
 9 | static/main*
10 | static/vendor*
11 | static/media
12 | static/index*
13 | static/*.css
14 | 


--------------------------------------------------------------------------------
/CHANGELOG.md:
--------------------------------------------------------------------------------
1 | **1.1.0** - migration to Hyperapp v2, PoachDB, support for multiple stablecoins
2 | 
3 | **1.0.1** - added tool for collecting payments from deposit addresses generated by Daipay
4 | 
5 | **1.0.0** - first release
6 | 
7 | 
8 | 


--------------------------------------------------------------------------------
/src/web/helpers.js:
--------------------------------------------------------------------------------
 1 | import { h } from 'hyperapp'
 2 | 
 3 | export function classNames(arr) {
 4 |   return arr.join(' ')
 5 | }
 6 | 
 7 | 
 8 | export function displayCurrency(amount, currency) {
 9 |   return <span>{amount.toFixed(2)} {currency}</span>
10 | }
11 | 


--------------------------------------------------------------------------------
/src/common/utils.js:
--------------------------------------------------------------------------------
 1 | import BigNumber from 'bignumber.js'
 2 | 
 3 | export function fromBN(val) {
 4 |   return new BigNumber(val).dividedBy(Math.pow(10,18)).toNumber()
 5 | }
 6 | 
 7 | export function toBN(val) {
 8 |   return BigNumber(val).multipliedBy(Math.pow(10,18))
 9 | }
10 | 
11 | 


--------------------------------------------------------------------------------
/src/contracts/index.js:
--------------------------------------------------------------------------------
1 | import ethProvider from './eth_provider'
2 | import { ethers } from 'ethers'
3 | import config from 'config'
4 | import DAI_ABI from './abi/ERC20.json'
5 | 
6 | export const DAI = new ethers.Contract(config.public.contracts.DAI.address, DAI_ABI, ethProvider)
7 | 
8 | export { ethProvider }
9 | 


--------------------------------------------------------------------------------
/src/server/index.js:
--------------------------------------------------------------------------------
 1 | import app from './server'
 2 | import config from 'config'
 3 | import { runLastBlockJob } from './jobs/invoices'
 4 | import { runCallbackJob }  from './jobs/callbacks'
 5 | 
 6 | app.listen(config.listen, _ => console.log("Listening on port",config.listen))
 7 | 
 8 | runLastBlockJob()
 9 | runCallbackJob()
10 | 


--------------------------------------------------------------------------------
/.babelrc:
--------------------------------------------------------------------------------
 1 | {
 2 |   "presets": [
 3 |     "@babel/env"
 4 |   ],
 5 |   "plugins": [
 6 |     ["@babel/plugin-transform-runtime", {
 7 |     }],
 8 |     ["@babel/plugin-proposal-decorators", { "legacy": true }],
 9 |     ["@babel/plugin-transform-react-jsx", { "pragma": "h", "pragmaFrag": "Fragment","throwIfNamespace":false }],
10 |   ]
11 | }
12 | 
13 | 


--------------------------------------------------------------------------------
/src/contracts/eth_provider.js:
--------------------------------------------------------------------------------
 1 | import { ethers } from 'ethers'
 2 | import config from 'config'
 3 | 
 4 | var provider
 5 | 
 6 | if (!provider) {
 7 |   switch(config.provider.type) {
 8 |     case 'rpc':
 9 |       provider  = new ethers.providers.JsonRpcProvider(config.provider.uri,config.provider.network)
10 |       break
11 |   }
12 | }
13 | export default provider
14 | 


--------------------------------------------------------------------------------
/src/web/main.scss:
--------------------------------------------------------------------------------
 1 | @import "node_modules/bulmaswatch/lumen/variables";
 2 | //$body-background-color: #549127;
 3 | //$title-color: #fff;
 4 | //$text: #fff;
 5 | @import "~bulma/bulma";
 6 | @import "node_modules/bulmaswatch/lumen/overrides";
 7 | 
 8 | .invoice {
 9 |   font-size: 12px;
10 | }
11 | .invoice .buttons {
12 |   margin-top: 1rem;
13 | }
14 | .hero-foot a {
15 |   color: #fff;
16 | }
17 | 


--------------------------------------------------------------------------------
/src/web/routes.js:
--------------------------------------------------------------------------------
 1 | import Home from './home'
 2 | import Invoice from './invoice'
 3 | 
 4 | export default {
 5 |   '/': {
 6 |     OnEnter: (state) => {
 7 |       return Home.Init({...state, viewFn: Home.View})
 8 |     }
 9 |   },
10 |   '/invoice/:id': {
11 |     OnEnter: (state, params) => {
12 |       console.log("OnEnter")
13 |       return Invoice.Init({...state, viewFn: Invoice.View}, params.id)
14 |     }
15 |   }
16 | }
17 | 


--------------------------------------------------------------------------------
/tools/scripts.webpack.config.js:
--------------------------------------------------------------------------------
 1 | const path = require('path')
 2 | const nodeExternals = require('webpack-node-externals')
 3 | 
 4 | module.exports = _ => ({
 5 |   target: 'node',
 6 |   entry: [
 7 |     './src/scripts/wallets.js'
 8 |   ],
 9 |   output: {
10 |     filename: './wallets.js',
11 |     path: path.resolve('./dist'),
12 |   },
13 |   module: {
14 |     rules: [
15 |       {
16 |         test: /\.js$/,
17 |         exclude: /node_modules/,
18 |         loader: "babel-loader",
19 |       }
20 |     ],
21 |   },
22 |   externals: nodeExternals(),
23 | })
24 | 
25 | 


--------------------------------------------------------------------------------
/src/common/validators.js:
--------------------------------------------------------------------------------
 1 | 
 2 | export function validateInvoiceForm(form) {
 3 |   const errors = [] 
 4 |   if (!form.items || !form.items.length) {
 5 |     errors.push('items are missing')
 6 |     return errors
 7 |   }
 8 |   let total = 0
 9 |   for(let item of form.items) {
10 |     if (!item.description) {
11 |       errors.push('item description can\'t be empty')
12 |       break
13 |     }
14 |     total += item.amount * (item.quantity || 1)
15 |   }
16 |   if (!total)
17 |     errors.push('invoice total')
18 |   form.totalAmount = total
19 |   form.paidAmount = 0
20 |   return errors
21 | }
22 | 


--------------------------------------------------------------------------------
/config/default.cson:
--------------------------------------------------------------------------------
 1 | listen: 8000
 2 | provider:
 3 |   type: "rpc"
 4 |   uri: "http://localhost:8545"
 5 |   #uri: "https://mainnet.vnode.app/v1/<YOUR TOKEN>"
 6 | 
 7 | apiKey: "CHANGEME"
 8 | 
 9 | invoices:
10 |   minConfirmations: 1
11 | 
12 | public:
13 |   allowTokens: ['DAI']
14 |   contracts:
15 |     DAI: 
16 |       address: "0x6b175474e89094c44da98b954eedeac495271d0f" # Mainnet
17 |       # address: "0xC4375B7De8af5a38a93548eb8453a498222C4fF2" DAI token on Kovan network
18 |     USDT:
19 |       address: "0xdAC17F958D2ee523a2206206994597C13D831ec7"
20 |     USDC:
21 |       address: "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48"
22 |     TUSD:
23 |       address: "0x0000000000085d4780B73119b644AE5ecd22b376"
24 | 


--------------------------------------------------------------------------------
/src/web/index.js:
--------------------------------------------------------------------------------
 1 | import { app } from 'hyperapp'
 2 | import { interval } from '@hyperapp/time'
 3 | import withRouter from '@mrbarrysoftware/hyperapp-router'
 4 | import Main from './main'
 5 | import routes from './routes'
 6 | import { FetchInvoice, FetchInvoiceFx } from './invoice'
 7 | 
 8 | const Init = [
 9 |   {}
10 | ]
11 | 
12 | const container = document.getElementById('app')
13 | 
14 | withRouter(app)({
15 |   router: {
16 |     RouteAction: (state, {params, path}) => ({...state}),
17 |     disableAnchorCapture: false,
18 |     routes,
19 |   },
20 |   init: Init, 
21 |   node: container,
22 |   view: Main,
23 |   subscriptions: state => {
24 |     const subs = []
25 |     subs.push(state.invoice ? interval([FetchInvoice,state.invoice._id], {delay:5000}) : false )
26 |     console.log("SUBS",subs)
27 |     return subs
28 |   }
29 | })
30 | 
31 | 


--------------------------------------------------------------------------------
/src/web/main.js:
--------------------------------------------------------------------------------
 1 | import { h } from 'hyperapp'
 2 | import Invoice from './invoice'
 3 | import './main.scss'
 4 | 
 5 | 
 6 | export default state => {
 7 |   if (__DEV__)
 8 |     console.log('===== STATE ======',state)
 9 |   return <main>
10 |     <section class="hero is-medium is-success is-bold is-fullheight">
11 |       <div class="hero-body">
12 |         <div class="container has-text-centered">
13 |           <div class="column is-4 is-offset-4">
14 |             { state.viewFn ? state.viewFn(state) : 'Loading' }
15 |           </div>
16 |         </div>
17 |       </div>
18 |       <div class="hero-foot">
19 |         <div class="content has-text-centered">
20 |           <p>
21 |             <a href="https://github.com/codevet/daipay" target="_blank">Powered by Decentrapay</a>
22 |           </p>
23 |         </div>
24 |       </div>
25 |     </section>
26 |   </main>
27 | }
28 | 
29 | 


--------------------------------------------------------------------------------
/src/server/jobs/callbacks.js:
--------------------------------------------------------------------------------
 1 | import request from 'request'
 2 | import Invoices from '../invoice/manager'
 3 | import config from 'config'
 4 | 
 5 | export async function checkPendingNotifications() {
 6 |   const invoices = await Invoices.findPaidInvoices()
 7 |   for(let invoice of invoices) {
 8 |     if (!invoice.notified && invoice.callbacks) {
 9 |       request.post(invoice.callbacks.paid.url, {json:{token:invoice.callbacks.token,invoiceId:invoice._id,metadata:invoice.metadata}}, (err, resp) => {
10 |         if (err || resp.statusCode != 200) {
11 |           console.log(`invoice #${invoice._id}: callback error occured:`,err)
12 |           return
13 |         }
14 |         Promise.resolve(Invoices.updateInvoice(invoice._id,{notified:Date.now(),state:'closed'}))
15 |       })
16 |     }
17 |   }
18 | }
19 | 
20 | export function runCallbackJob() {
21 |   checkPendingNotifications()
22 |   setInterval(checkPendingNotifications, 15000)
23 | }
24 | 


--------------------------------------------------------------------------------
/src/server/api_v1.js:
--------------------------------------------------------------------------------
 1 | import Router from 'koa-router'
 2 | import Invoices from './invoice/manager'
 3 | import { validateInvoiceForm } from '../common/validators'
 4 | import config from 'config'
 5 | 
 6 | const router = new Router()
 7 | 
 8 | router.get('/version', (ctx,next) => {
 9 |   ctx.body = 'v1'
10 | })
11 | 
12 | router.post('/invoice', async (ctx, next) => {
13 |   const form = ctx.request.body
14 |   if (config.apiKey && (config.apiKey !== form.apiKey) )
15 |     ctx.throw(403, 'invalid token')
16 |   const errors = validateInvoiceForm(form)
17 |   if (errors.length) {
18 |     ctx.body = {
19 |       errors
20 |     }
21 |     return
22 |   }
23 |   form.expires = form.expires || Date.now() + 24 * 60 * 60000
24 |   const invoice = await Invoices.createInvoice(form) 
25 |   ctx.body = {
26 |     invoiceId: invoice._id
27 |   }
28 | })
29 | 
30 | router.get('/invoice/:id', async (ctx, next) => {
31 |   const invoice = await Invoices.getInvoice(ctx.params.id) 
32 |   console.log("INVOICE",invoice)
33 |   ctx.body = invoice
34 | })
35 | 
36 | export default router
37 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2019 DaiPay
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


--------------------------------------------------------------------------------
/src/server/server.js:
--------------------------------------------------------------------------------
 1 | import fs from 'fs'
 2 | import path from 'path'
 3 | import Koa from 'koa'
 4 | import koaLogger from 'koa-logger'
 5 | import Router from 'koa-router'
 6 | import bodyParser from 'koa-bodyparser'
 7 | import mount from 'koa-mount'
 8 | import api from './api_v1'
 9 | 
10 | const router = new Router()
11 | const app = new Koa()
12 | 
13 | if (__DEV__ || __TEST__)
14 |   app.use(koaLogger())
15 | app
16 |   .use(bodyParser())
17 |   .use(router.routes())
18 |   .use(mount('/api/v1',api.routes()))
19 | 
20 | if (__DEV__) {
21 |   const requireFunc = typeof __webpack_require__ === "function" ? __non_webpack_require__ : require;
22 |   const koaWebpack = require('koa-webpack')
23 |   const serve = require('koa-static')
24 |   const [webConfig, ] = requireFunc('../tools/app.webpack.config.js')()
25 |   koaWebpack({
26 |     config: webConfig,
27 |     devMiddleware: {index:false}
28 |   }).then(middleware => {
29 |     app.use(middleware)
30 |     app.use(serve('./static')) 
31 |     app.use(async (ctx, next) => {
32 |       if (ctx.request.method === 'POST') {
33 |         return next()
34 |       }
35 |       const filename = path.resolve(webConfig.output.path, 'index.html')
36 |       const index = fs.readFileSync(filename,{encoding:'utf8'})
37 |       ctx.response.type = 'html'
38 |       ctx.response.body = index
39 |     })
40 |   })
41 | } 
42 | export default app
43 | 


--------------------------------------------------------------------------------
/src/contracts/abi/ERC20.json:
--------------------------------------------------------------------------------
1 | [{"constant":false,"inputs":[{"name":"guy","type":"address"},{"name":"wad","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"src","type":"address"},{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"guy","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"src","type":"address"},{"name":"guy","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":true,"name":"guy","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":true,"name":"dst","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Transfer","type":"event"}]
2 | 


--------------------------------------------------------------------------------
/src/server/invoice/manager.js:
--------------------------------------------------------------------------------
 1 | import PouchDB from 'pouchdb'
 2 | import { ethers } from 'ethers'
 3 | PouchDB.plugin(require('pouchdb-find'))
 4 | PouchDB.plugin(require('pouchdb-adapter-node-websql'))
 5 | 
 6 | let walletDB, invoiceDB 
 7 | 
 8 | if (!walletDB)  {
 9 |   walletDB = new PouchDB('wallets.db', {adapter:'websql'})
10 |   invoiceDB = new PouchDB('invoices.db', {adapter:'websql'})
11 |   invoiceDB.createIndex({
12 |     index: {
13 |       fields: ['state']
14 |     }
15 |   })
16 | 
17 | }
18 | 
19 | export default class {
20 |   static async createInvoice(form) {
21 |     delete form['apiKey']
22 |     form.currency = form.currency || 'DAI'
23 |     const props = {...form}
24 |     props.created = Date.now()
25 |     let wallet = ethers.Wallet.createRandom()
26 |     wallet = {address:wallet.address,privateKey:wallet.privateKey}
27 |     let result = await walletDB.post(wallet)
28 |     props.wallet = {
29 |       _id: result.id,
30 |       address: wallet.address,
31 |       key: wallet.privateKey,
32 |       created: Date.now()
33 |     }
34 |     props.state = 'pending'
35 |     result = await invoiceDB.post(props)
36 |     return invoiceDB.get(result.id).then( res => { console.log(res); return res } )
37 |   } 
38 |   static getInvoice(id) {
39 |     return invoiceDB.get(id)
40 |   }
41 |   static findPendingInvoices() {
42 |     return invoiceDB.find({selector:{state:{$in:['pending','confirming']}}}).then( result => result.docs )
43 |   }
44 |   static findPaidInvoices() {
45 |     return invoiceDB.find({selector:{state:'paid'}}).then( result => result.docs )
46 |   }
47 |   static async updateInvoice(id, upd) {
48 |     let doc = await invoiceDB.get(id)
49 |     doc = Object.assign(doc, upd) 
50 |     return invoiceDB.put({_id:id,_rev:doc._rev,...doc})
51 |   }
52 | }
53 | 


--------------------------------------------------------------------------------
/src/server/jobs/invoices.js:
--------------------------------------------------------------------------------
 1 | import _ from 'lodash'
 2 | import { DAI, ethProvider } from '../../contracts'
 3 | import Invoices from '../invoice/manager'
 4 | import { fromBN } from '../../common/utils'
 5 | import config from 'config'
 6 | 
 7 | export async function checkPendingInvoices(tokenContract, provider) {
 8 |   const invoices = await Invoices.findPendingInvoices()
 9 |   console.log("INVOICES",invoices)
10 |   const curBlock = await provider.getBlockNumber()
11 |   const tasks = []
12 |   console.log(`checkPendingInvoices: found ${invoices.length} invoices`)
13 |   for(let invoice of invoices) {
14 |     console.log(invoice)
15 |     const balanceBN = (await tokenContract.balanceOf(invoice.wallet.address)).toString()
16 |     const balance = fromBN(balanceBN)
17 |     const upd = {}
18 |     if (balance != invoice.paidAmount) {
19 |       upd.paidAmount = balance
20 |     }
21 |     const expires = invoice.expires || (invoice.created + 24 * 60 * 60000) // 1 day
22 |     if (Date.now() > expires) {
23 |       upd.state = 'expired'
24 |     }
25 |     if (balance >= invoice.totalAmount) {
26 |       if (config.invoices.minConfirmations) {
27 |         if (invoice.confirmBlock) {
28 |           console.log('curBlock',curBlock,invoice.confirmBlock)
29 |           if (curBlock >= invoice.confirmBlock) {
30 |             upd.state = 'paid'
31 |           }  
32 |         } else {
33 |           upd.state = 'confirming'
34 |           upd.confirmBlock = curBlock + config.invoices.minConfirmations
35 |         }
36 |       } else
37 |         upd.state = 'paid'
38 |     }
39 |     if (!_.isEmpty(upd)) {
40 |       console.log(`updating invoice #${invoice._id}`,upd)
41 |       tasks.push(Invoices.updateInvoice(invoice._id, upd))
42 |     }
43 |   }
44 |   return tasks
45 | }
46 | export function runLastBlockJob() {
47 |   let curBlock, lastBlock = 0
48 |   const updateLastBlock = async _ => {
49 |     try {
50 |       curBlock = await  ethProvider.getBlockNumber()
51 |       if (curBlock > lastBlock) {
52 |         lastBlock = ethProvider.blockNumber
53 |         await checkPendingInvoices(DAI, ethProvider) 
54 |       }
55 |     } catch(e) {
56 |       console.log(e)
57 |     }
58 |     setTimeout(updateLastBlock, 1000)
59 |   }
60 |   updateLastBlock()
61 | }
62 | 


--------------------------------------------------------------------------------
/test/ERC20_ABI.json:
--------------------------------------------------------------------------------
1 | [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balances","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowed","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_initialAmount","type":"uint256"},{"name":"_tokenName","type":"string"},{"name":"_decimalUnits","type":"uint8"},{"name":"_tokenSymbol","type":"string"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Approval","type":"event"}]


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "decentrapay",
 3 |   "version": "1.0.1",
 4 |   "description": "Stablecoin payment processor",
 5 |   "scripts": {
 6 |     "test": "mocha --compilers js:@babel/register --timeout 20000 test/test.js",
 7 |     "wallets": "./node_modules/.bin/babel-node ./src/scripts/wallets.js",
 8 |     "watch": "webpack --config ./tools/app.webpack.config.js --mode development --watch",
 9 |     "devserver": "$(npm bin)/nodemon -w ./dist ./dist/server",
10 |     "dev": "webpack --config ./tools/app.webpack.config.js --mode development && npm-run-all --parallel watch devserver",
11 |     "build": "NODE_ENV=production webpack --config ./tools/app.webpack.config.js --mode production --verbose",
12 |     "build-scripts": "NODE_ENV=production ./node_modules/.bin/webpack --config ./tools/scripts.webpack.config.js",
13 |     "start": "NODE_ENV=production node ./dist/server"
14 |   },
15 |   "author": "",
16 |   "license": "mit",
17 |   "devDependencies": {
18 |     "@babel/cli": "^7.10.4",
19 |     "@babel/core": "^7.10.4",
20 |     "@babel/node": "^7.10.4",
21 |     "@babel/plugin-proposal-decorators": "^7.10.4",
22 |     "@babel/plugin-transform-react-jsx": "^7.10.4",
23 |     "@babel/plugin-transform-runtime": "^7.10.4",
24 |     "@babel/preset-env": "^7.10.4",
25 |     "@babel/register": "^7.10.4",
26 |     "babel-loader": "^8.1.0",
27 |     "html-webpack-plugin": "^3.2.0",
28 |     "html-webpack-template": "^6.2.0",
29 |     "koa-static": "^5.0.0",
30 |     "koa-webpack": "^5.3.0",
31 |     "mini-css-extract-plugin": "^0.5.0",
32 |     "mkdirp": "^0.5.5",
33 |     "mocha": "^5.2.0",
34 |     "node-sass": "^4.14.1",
35 |     "nodemon": "^1.19.4",
36 |     "npm-run-all": "^4.1.5",
37 |     "sass-loader": "^9.0.1",
38 |     "solc": "^0.5.17",
39 |     "supertest": "^3.4.2",
40 |     "webpack": "^4.43.0",
41 |     "webpack-cli": "^3.3.12",
42 |     "webpack-node-externals": "^1.7.2"
43 |   },
44 |   "dependencies": {
45 |     "@babel/runtime": "^7.10.4",
46 |     "@hyperapp/router": "^0.7.1",
47 |     "@hyperapp/time": "0.0.10",
48 |     "@mrbarrysoftware/hyperapp-router": "0.0.1-beta.8",
49 |     "bignumber.js": "^8.0.1",
50 |     "bulma": "^0.9.0",
51 |     "bulmaswatch": "^0.8.1",
52 |     "command-line-args": "^5.0.2",
53 |     "config": "^3.3.1",
54 |     "cson": "^5.1.0",
55 |     "css-loader": "^2.1.0",
56 |     "ethers": "^4.0.47",
57 |     "gasless": "^1.0.3",
58 |     "hyperapp": "^2.0.4",
59 |     "koa": "^2.13.0",
60 |     "koa-bodyparser": "^4.3.0",
61 |     "koa-logger": "^3.2.1",
62 |     "koa-mount": "^4.0.0",
63 |     "koa-router": "^9.1.0",
64 |     "mongoose": "^5.9.21",
65 |     "pouchdb": "^7.2.1",
66 |     "pouchdb-adapter-node-websql": "^7.0.0",
67 |     "pouchdb-find": "^7.2.1",
68 |     "qrcode": "^1.3.3",
69 |     "request": "^2.88.2",
70 |     "shortid": "^2.2.14",
71 |     "web3": "^1.2.11",
72 |     "xhr2": "^0.2.0"
73 |   }
74 | }
75 | 


--------------------------------------------------------------------------------
/src/scripts/wallets.js:
--------------------------------------------------------------------------------
 1 | import BigNumber from 'bignumber.js'
 2 | import commandLineArgs from 'command-line-args'
 3 | import { ethers } from 'ethers'
 4 | import Invoices from '../server/invoice/manager'
 5 | import { DAI,ethProvider } from '../contracts'
 6 | import { fromBN,toBN } from '../common/utils'
 7 | import xhr2 from 'xhr2'
 8 | global.XMLHttpRequest = xhr2
 9 | import Gasless from 'gasless'
10 | import Web3 from "web3"
11 | 
12 | let web3 = new Web3(
13 |   // Replace YOUR-PROJECT-ID with a Project ID from your Infura Dashboard
14 |   new Web3.providers.WebsocketProvider("wss://mainnet.infura.io/ws/v3/8373ce611754454884132be22b562e45")
15 | );
16 | 
17 | 
18 | const optionDefs = [
19 |   {name: 'destination', alias:'d', type:String},
20 |   {name: 'gaslimit', type:Number, defaultValue:50000},
21 | ]
22 | 
23 | const fatal = (msg) => {
24 |   console.log(msg)
25 |   process.exit(1)
26 | }
27 | async function main() {
28 |   const options = commandLineArgs(optionDefs)
29 |   const invoices = await Invoices.findPaidInvoices()
30 |   console.log(`Found ${invoices.length} paid invoices`)
31 |   const gasless = new Gasless(web3.currentProvider);
32 |   for(let invoice of invoices) {
33 |     const wallet = invoice.wallet
34 |     let balanceBN = (await DAI.balanceOf(wallet.address))
35 |     let balance = fromBN(balanceBN)
36 |     console.log(`${wallet.address} DAI balance: ${balance} `)
37 |     if (balance > 0) {
38 |       let ethBalance = new BigNumber((await ethProvider.getBalance(wallet.address)).toString())
39 |       console.log(`${wallet.address} ETH balance: ${fromBN(ethBalance)}`)
40 |       if (options.destination) {
41 |         const account = web3.eth.accounts.wallet.add(wallet.key)
42 |         const gasPrice = await web3.eth.getGasPrice()
43 |         const daiFee = await gasless.getFee(gasPrice)
44 |         console.log(daiFee)
45 |         let from = wallet.address
46 |         let to = options.destination
47 |         const tx = await gasless.send(
48 |           from,
49 |           to,
50 |           balanceBN,
51 |           daiFee,
52 |           gasPrice  
53 |         ) 
54 |         /*
55 |         const gasPrice = new BigNumber((await ethProvider.getGasPrice()).toString()).multipliedBy(1.25)  // increase last block gasprice 25% for faster transactions
56 |         console.log(`setting gas price to ${gasPrice.toNumber()}`)
57 | 
58 |         console.log(`collecting ${balance} DAI from ${wallet.address}`)
59 |         const DAIWithSigner = DAI.connect(new ethers.Wallet(wallet.privateKey, ethProvider))
60 |         tx = await DAIWithSigner.transfer(options.collect, balanceBN)
61 |         try {
62 |           await tx.wait()
63 |           console.log('done.')
64 |         } catch(e) {
65 |           console.log('sending tokens failed',e)
66 |         } 
67 |         */
68 |       }
69 |     }
70 |   }
71 |   process.exit(0)
72 | }
73 | 
74 | main() 
75 | 


--------------------------------------------------------------------------------
/src/web/invoice.js:
--------------------------------------------------------------------------------
  1 | import assert from 'assert'
  2 | import { h } from 'hyperapp'
  3 | import { classNames, displayCurrency } from './helpers'
  4 | import QRCode from 'qrcode'
  5 | import config from 'config'
  6 | 
  7 | export function fx(a) {
  8 |   return function(b) {
  9 |     return [a, b]
 10 |   }
 11 | }
 12 | function SetInvoice(state, invoice) {
 13 |   return {...state, invoice}
 14 | }
 15 | 
 16 | function SetQRCode(state, qrcode) {
 17 |   return {...state, qrcode}
 18 | }
 19 | 
 20 | async function fetchInvoice(dispatch, params) {
 21 |   assert(params.id)
 22 |   const opts = {}
 23 |   opts.headers = new Headers({'Content-Type': 'application/json'})
 24 |   let result = await fetch(`/api/v1/invoice/${params.id}`, opts)
 25 |   const invoice = await result.json()
 26 |   dispatch([SetInvoice, invoice])
 27 |   if (params.generateQR) {
 28 |     let qrcode = await QRCode.toDataURL(`ethereum:${invoice.wallet.address}/transfer?address=${config.contracts.DAI.address}&uint256=${invoice.totalAmount}`)
 29 |     dispatch([SetQRCode, qrcode])
 30 |   }
 31 | }
 32 | 
 33 | export const FetchInvoiceFx = fx(fetchInvoice)
 34 | 
 35 | export function FetchInvoice(state, id) {
 36 |   return [
 37 |     state, 
 38 |     FetchInvoiceFx({id})
 39 |   ]
 40 | }
 41 | 
 42 | function showStatusLine(state) {
 43 |   let cls, msg
 44 |   switch(state) {
 45 |     case 'pending':
 46 |       cls = ['has-background-info','has-text-white']
 47 |       msg = <span><button class="button is-loading is-info is-small"/> Awaiting payment</span>
 48 |       break
 49 |     case 'paid':
 50 |     case 'confirming':
 51 |       cls = ['has-background-success','has-text-white']
 52 |       msg = <span><button class="button is-loading is-success is-small"/> Confirming</span>
 53 |       break  
 54 |     case 'closed':
 55 |       cls = ['has-background-success','has-text-white']
 56 |       msg = 'Paid'
 57 |       break  
 58 |     case 'expired':
 59 |       cls = ['has-background-danger','has-text-white']
 60 |       msg = 'Expired'
 61 |       break
 62 |   }
 63 |   return <div class={classNames(cls)}>{ msg }</div> 
 64 | }
 65 | 
 66 | export default {
 67 |   Init: (state, id) => {
 68 |     return [
 69 |       state,
 70 |       FetchInvoiceFx({id,generateQR:true})
 71 |     ]
 72 |   },
 73 |   View: state => {
 74 |     const { invoice, qrcode } = state
 75 |     let content
 76 |     if (invoice) {
 77 |       const amountDue = invoice.totalAmount - invoice.paidAmount 
 78 |       const currency = invoice.currency
 79 |       let merchantInfo 
 80 |       if (invoice.merchant) {
 81 |         merchantInfo = <div class="columns">
 82 |           <div class="column is-6 is-offset-6 has-text-right">
 83 |             <strong>{ invoice.merchant.name }</strong>
 84 |             { invoice.merchant.address ? <div>{ invoice.merchant.address }</div> : null }
 85 |           </div>
 86 |         </div>
 87 |       }
 88 |       content = <div class="invoice">
 89 |         <h5 class="title is-5 has-text-black">Invoice #{ invoice._id }</h5>
 90 |         { merchantInfo }
 91 |         <table class="table is-striped is-fullwidth">
 92 |         <tbody>
 93 |         { invoice.items.map( i => <tr><td>{ i.description }</td><td>{ displayCurrency(i.amount, currency) } </td></tr>) }
 94 |         <tr><td><strong>Total:</strong></td><td>{ displayCurrency(invoice.totalAmount, currency) }</td></tr>
 95 |         <tr><td><strong>Paid:</strong></td><td>{ displayCurrency(invoice.paidAmount, currency) }</td></tr>
 96 |         </tbody>
 97 |         </table>
 98 |         { amountDue >= 0.01 ? <div>Transfer <strong>{ displayCurrency(amountDue, currency) }</strong> to</div> : 'Deposit address:'} <div><strong>{ invoice.wallet.address }</strong></div>
 99 |         <div class="columns">
100 |           <div class="column is-6">
101 |             { qrcode ? <img src={qrcode} /> : null }
102 |           </div>
103 |           <div class="column is-6">
104 |             <div class="buttons is-centered">
105 |               <a class="button is-info is-small" href={`http://etherscan.io/address/${invoice.wallet.address}`} target='_blank'>View transactions</a>
106 |             </div>
107 |           </div>
108 |         </div>
109 |         <div>
110 |         { showStatusLine(invoice.state) }
111 |         </div>
112 |       </div> 
113 |     } else {
114 |       content = 'Loading...'
115 |     }
116 |     return <div class="box">{ content }</div>
117 |   }
118 | }
119 | 


--------------------------------------------------------------------------------
/tools/app.webpack.config.js:
--------------------------------------------------------------------------------
  1 | const webpack = require('webpack')
  2 | const nodeExternals = require('webpack-node-externals')
  3 | const MiniCssExtractPlugin = require("mini-css-extract-plugin")
  4 | const HtmlWebpackPlugin = require('html-webpack-plugin')
  5 | const path = require('path')
  6 | const config = require('config')
  7 | const fs = require('fs')
  8 | const mkdirp = require('mkdirp')
  9 | 
 10 | const clientConfigPath = path.resolve(__dirname, '../static/client.json')
 11 | 
 12 | console.log("Generating client config")
 13 | mkdirp.sync('./static')
 14 | fs.writeFileSync(clientConfigPath, JSON.stringify(config.public))
 15 | 
 16 | module.exports = (env = {prod: process.env['NODE_ENV'] == 'production'}) => {
 17 |   const __DEV__ = !env.prod
 18 |   const externals = nodeExternals()
 19 |   const webConfig = {
 20 |     entry: [
 21 |       './src/web/index.js'
 22 |     ],
 23 |     target: 'web',
 24 |     output: {
 25 |       filename: __DEV__ ? '[name].js' : '[name].[contenthash].js',
 26 |       path: path.resolve('./static'),
 27 |       publicPath: '/'
 28 |     },
 29 |     module: {
 30 |       rules: [
 31 |         {
 32 |           test: /\.js$/,
 33 |           exclude: /node_modules/,
 34 |           loader: "babel-loader",
 35 |         },
 36 |         {
 37 |           test: /\.(sa|sc|c)ss$/,
 38 |           use: [
 39 |             MiniCssExtractPlugin.loader,
 40 |             'css-loader',
 41 |             'sass-loader',
 42 |           ],
 43 |         }
 44 |       ],
 45 |     },
 46 |     resolve: {
 47 |       alias: {
 48 |         config: clientConfigPath
 49 |       },
 50 |     },
 51 |     devtool: env.prod ? '' : 'eval',
 52 |     optimization: env.prod ? {
 53 |       runtimeChunk: 'single',
 54 |       splitChunks: {
 55 |         cacheGroups: {
 56 |           vendor: {
 57 |             test: /[\\/]node_modules[\\/]/,
 58 |             name: "vendor",
 59 |             chunks: "all"
 60 |           }
 61 |         }
 62 |       }
 63 |     } : {} ,
 64 |     plugins: [
 65 |       new MiniCssExtractPlugin({
 66 |         filename: __DEV__ ? '[name].css' : '[name].[hash].css',
 67 |         chunkFilename: __DEV__ ? '[id].css' : '[id].[hash].css',
 68 |       }),
 69 |       new HtmlWebpackPlugin({
 70 |         title:'Daipay',      
 71 |         inject: false,
 72 |         template: require('html-webpack-template'),
 73 |         filename: 'index.html',
 74 |         inject: 'body',
 75 |         meta: [
 76 |           {name:'description',content:'Daipay'},
 77 |           {name:'viewport',content:'width=device-width, initial-scale=1.0'},
 78 |         ],
 79 |         links: [
 80 |           {rel:'icon',type:'image/png',href:'/icons/favicon.png?v=2'},
 81 |           {rel:'apple-touch-icon',sizes:'180x180',href:'/icons/apple-touch-icon.png'},
 82 |           {rel:'stylesheet',href:'https://use.fontawesome.com/releases/v5.5.0/css/all.css',integrity:'sha384-B4dIYHKNBt8Bc12p+WXckhzcICo0wtJAoU8YZTY5qE0Id1GSseTk6S+L3BlXeVIU',crossorigin:'anonymous'}
 83 |         ],
 84 |         scripts: [
 85 |         ],
 86 |         bodyHtmlSnippet: '<div id="app"/>'
 87 |       }),
 88 |       new webpack.DefinePlugin({
 89 |         __DEV__
 90 |       })
 91 |     ],
 92 |   }
 93 |   const serverConfig = {
 94 |     target: 'node',
 95 |     entry: [
 96 |       './src/server/index.js'
 97 |     ],
 98 |     output: {
 99 |       filename: './server.js',
100 |       path: path.resolve('./dist'),
101 |     },
102 |     module: {
103 |       rules: [
104 |         {
105 |           test: /\.js$/,
106 |           exclude: /node_modules/,
107 |           loader: "babel-loader",
108 |           /*
109 |           options: {
110 |             presets: ['@babel/env']
111 |           }
112 |           */
113 |         },
114 |         {
115 |           test: /\.handlebars/,
116 |           loaders: ['raw-loader']
117 |         },
118 |         {
119 |           test: /\.(sa|sc|c)ss$/,
120 |           use: [
121 |             MiniCssExtractPlugin.loader,
122 |             'css-loader',
123 |             'sass-loader',
124 |           ],
125 |         },
126 |       ],
127 |     },
128 |     plugins: [
129 |       new MiniCssExtractPlugin({
130 |         filename: __DEV__ ? '[name].css' : '[name].[hash].css',
131 |         chunkFilename: __DEV__ ? '[id].css' : '[id].[hash].css',
132 |       }),
133 |       new webpack.DefinePlugin({
134 |         __DEV__: !env.prod,
135 |         __TEST__: false
136 |       })
137 |     ],
138 |     externals: nodeExternals({whitelist: ['webpack-hot-client']}),
139 |   }
140 |   return [webConfig, serverConfig]
141 | }
142 | 


--------------------------------------------------------------------------------
/test/test.js:
--------------------------------------------------------------------------------
  1 | import assert from 'assert'
  2 | import http from 'http'
  3 | import fs from 'fs'
  4 | import path from 'path'
  5 | import request from 'supertest'
  6 | import BigNumber from 'bignumber.js'
  7 | import { ethers } from 'ethers'
  8 | import ERC20_ABI from './ERC20_ABI.json'
  9 | import config from 'config'
 10 | 
 11 | 
 12 | const binPath = path.join(__dirname,'./ERC20.bin')
 13 | const bytecode = fs.readFileSync(binPath,'UTF-8')
 14 | 
 15 | global.__DEV__ = false
 16 | global.__TEST__ = true
 17 | var app = require('../src/server/server').default.listen(8000)
 18 | 
 19 | 
 20 | const TOKEN='SECRET'
 21 | 
 22 | function fetchInvoice(invoiceId) {
 23 |   return new Promise((resolve, reject) => {
 24 |     request(app)    
 25 |       .get(`/api/v1/invoice/${invoiceId}`)
 26 |       .set('Accept', 'application/json')
 27 |       .expect(200)
 28 |       .end((err, res) => {
 29 |         if (err)
 30 |           reject(err)
 31 |         else {
 32 |           console.log(res.body)
 33 |           resolve(res.body)
 34 |         }
 35 |       })
 36 |   })
 37 | }
 38 | 
 39 | function sleep(ms) {
 40 |   return new Promise((resolve,reject) => {
 41 |     setTimeout(resolve, ms)
 42 |   })
 43 | }
 44 | describe('basic functionality', function() {
 45 |   let provider, wallet, accounts, contract
 46 |   let invoiceId, invoice
 47 |   before(done => {
 48 |     // Load the wallet to deploy the contract with
 49 |     provider = new ethers.providers.JsonRpcProvider('http://localhost:8545')
 50 |     provider.listAccounts().then( result => {
 51 |       accounts = result
 52 |       console.log(accounts)
 53 |       // Load the wallet to deploy the contract with
 54 |       let privateKey = '97a5328dcde49f1f6224b18cddc935b4f3e79e80cb1dcb2cf43f1033be890fd9'; // default ganache key
 55 |       wallet = new ethers.Wallet(privateKey, provider);
 56 |       // Create an instance of a Contract Factory
 57 |       let factory = new ethers.ContractFactory(ERC20_ABI, bytecode, wallet);
 58 | 
 59 |       // Notice we pass in "Hello World" as the parameter to the constructor
 60 |       const totalSupply = new BigNumber(100).multipliedBy(new BigNumber(Math.pow(10,18)))
 61 |       factory.deploy(totalSupply.toString(), 'DAI', 18, 'DAI').then( result => {
 62 |         contract = result
 63 |         console.log("ERC20 contract deployed")
 64 |         contract.totalSupply().then( result => console.log("total supply:",result))
 65 |         done()
 66 |       })
 67 |     })
 68 |     http.createServer((req, resp) => {
 69 |       console.log("callback triggered")
 70 |       let body = ''
 71 |       req.on('readable', _ => {
 72 |         const data = req.read()
 73 |         if (data)
 74 |           body += data
 75 |       })
 76 |       req.on('end', _ => {
 77 |         console.log(body)
 78 |         body = JSON.parse(body)
 79 |         assert(body.token === TOKEN,'server token should match')
 80 |         resp.writeHead(200)
 81 |         resp.end() 
 82 |       })
 83 |     }).listen(8001) 
 84 |   })
 85 |   it('should throw error', done => {
 86 |     request(app)    
 87 |       .post('/api/v1/invoice')
 88 |       .set('Accept', 'application/json')
 89 |       .expect(403)
 90 |       .end((err, res) => {
 91 |         done()
 92 |       })
 93 |   })
 94 |   it('should create new invoice', done => {
 95 |     request(app)    
 96 |       .post('/api/v1/invoice')
 97 |       .send({apiKey:config.apiKey,items:[{description: "item #1",amount:1}],callbacks:{token:TOKEN,paid:{url:'http://localhost:8001'}},metadata:{orderId:'ABCDEF'}})
 98 |       .set('Accept', 'application/json')
 99 |       .expect(200)
100 |       .end((err, res) => {
101 |         invoiceId = res.body.invoiceId
102 |         done(err)
103 |       })
104 |   })
105 |   it('should return invoice info', done => {
106 |     fetchInvoice(invoiceId).then( result => {
107 |       invoice = result
108 |       done()
109 |     })
110 |   })
111 |   it('should send coins to the invoice', done => {
112 |     const { checkPendingInvoices } = require('../src/server/jobs/invoices')
113 |     const { checkPendingNotifications } = require('../src/server/jobs/callbacks') 
114 |     contract.transfer(invoice.wallet.address, new BigNumber(0.99 * Math.pow(10,18)).toString()).then( tx => {
115 |       return tx.wait()
116 |     }).then( res => {
117 |       contract.balanceOf(accounts[0]).then( result => console.log("balance:",result.toString()))
118 |       contract.balanceOf(invoice.wallet.address).then( result => console.log("invoice balance:",result.toString()))
119 |       return checkPendingInvoices(contract,provider).then( result => {
120 |         return fetchInvoice(invoiceId).then( result => {
121 |           assert(result.state === 'pending')          
122 |         })
123 |       })
124 |     }).then( _ => {
125 |       return contract.transfer(invoice.wallet.address, new BigNumber(0.01 * Math.pow(10,18)).toString()).then( tx => {
126 |         return tx.wait()
127 |       }).then( async res => {
128 |         await checkPendingInvoices(contract,provider)
129 |         const invoice = await fetchInvoice(invoiceId)
130 |         assert(invoice.state === 'confirming','should be in confirming state') 
131 |         const curBlock = await provider.getBlockNumber()
132 |         // force block mining 
133 |         for(let i = 0; i < config.invoices.minConfirmations; i++) {
134 |           await contract.transfer(accounts[1], new BigNumber(0.0001 * Math.pow(10,18)).toString()).then( tx => (tx.wait()))
135 |         }
136 |         return checkPendingInvoices(contract,provider).then( result => {
137 |           return fetchInvoice(invoiceId).then( result => {
138 |             assert(result.state === 'paid','invoice should be paid')          
139 |           })
140 |         })
141 |       }).then( _ => {
142 |         checkPendingNotifications().then( _ => {
143 |           sleep(1000).then( _ => fetchInvoice(invoiceId).then( result => {
144 |             assert(result.state === 'closed','invoice should be closed')
145 |             done()
146 |           }))
147 |         })
148 |       })
149 |     })
150 |   })
151 | })
152 | 
153 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | **Decentrapay** is an open-source payment processor which allows you to receive stablecoin tokens for payments.
  2 | 
  3 | ### Motivation
  4 | The goal of the project is to provide merchants with a decentralized, trustless solution to accept payments on the Ethereum blockchain.
  5 | 
  6 | ### Features
  7 | - Direct P2P payments
  8 | - No volatility risk as stablecoins are tied to fiat
  9 | - Complete control over private keys
 10 | - No middleman
 11 | - REST API for managing invoices
 12 | - Web interface for accessing invoices
 13 | - A tool for managing generated wallets and forwarding payments
 14 | 
 15 | ### Requirements
 16 | - Node v12 or newer
 17 | - Access to the Ethereum network
 18 | 
 19 | ## Installation
 20 | 
 21 | Run the below commands:
 22 | 
 23 |     git clone https://github.com/defisapiens/decentrapay.git
 24 |     cd decentrapay
 25 |     npm install
 26 | 
 27 | 
 28 | Don't forget to update local reposotory regularly to catch up with latest updates
 29 | 
 30 |     git pull origin master
 31 |     npm install
 32 | 
 33 | ## Configuration
 34 | 
 35 | Decentrapay needs to connect to the Ethereum network to process transactions. You have two options:
 36 | 
 37 | - Connect to a locally running Ethereum node (geth or parity)
 38 | - Use a third-party node service provider such as [Infura](https://infura.io/)
 39 | 
 40 | Open config/default.cson in a text editor and make necessary changes:
 41 | 
 42 |   1. If you are using an external node provider, update the provider section
 43 | 
 44 |     provider:
 45 |       type: "rpc"
 46 |         uri: "http://localhost:8545" # replace with an endpoint URL from an external provider
 47 | 
 48 | 
 49 |   2. Change the apiKey to some unique string. The API key is used to post invoices to Decentrapay.
 50 | 
 51 | 
 52 | ## Running Decentrapay
 53 | 
 54 | To run the server in development mode, use the following command:
 55 | 
 56 |         npm run dev 
 57 | 
 58 | For production mode:
 59 | 
 60 |         npm run build
 61 |         npm start
 62 | 
 63 | 
 64 | 
 65 | 
 66 | ## API
 67 | 
 68 | Invoice object has the following properties:
 69 | 
 70 |   - apiKey - The API key to verify that the invoice creator is trusted (it is not stored in the database)
 71 |   - currency - Currency of the invoice. DAI,USDT,TUSD,USDC are supported at the moment. (optional)
 72 |   - merchant - The information about the merchant (optional)
 73 |        - name - The merchant’s name
 74 |        - address - The address to be displayed in the invoice
 75 |   - items - an array containing the invoice items. Decentrapay calculates totalAmount for all items and stores it with the invoice.
 76 |        -  description - item description
 77 |        -  quantity - number of units to be purchased (optional, default is 1)
 78 |        -  amount - the unit cost  
 79 |   - metadata - contains arbitrary data which is passed back to the app via the callback (see below). (optional)
 80 |   - expires - a timestamp until the invoice is valid (optional, default is 24 hours after the invoice was created)
 81 |   - callbacks - specifies where Decentrapay server should send a POST request containing  token and metadata for notifying the app that the payment occurs.
 82 |        - token - a secret token to verify that the callback is originated from Decentrapay server
 83 |        - paid  
 84 |             - url  - where POST request should be sent to
 85 | 
 86 | Invoices can be created by sending a POST request to the /api/v1/invoice endpoint
 87 | 
 88 | An example with curl (replace API_KEY with the apiKey from the config file):
 89 | 
 90 |         curl http://localhost:8000/api/v1/invoice --header "Content-Type: application/json" -X POST -d '{"apiKey":"API_KEY",currency:"DAI","items":[{"description":"My item","amount":1}]}'
 91 | 
 92 | The backend will create a new invoice record and return its id
 93 | 
 94 |         {"invoiceId":"bfuWuYgRs"}
 95 | 
 96 | 
 97 | The invoice can be viewed in a browser at http://localhost:8000/invoice/bfuWuYgRs
 98 | 
 99 | ![Decentrapay invoice](https://i.imgur.com/EGsJTPe.png)
100 | 
101 | Also, the invoice record can be accessed via REST API:
102 | 
103 |         curl http://localhost:8000/api/v1/invoice/bfuWuYgRs
104 | 
105 | 
106 |         {"deposit":{"_id":"xm-8-8lThd","address":"0xE6F2392Fe8ED75f684cb93fA0e278f0E404a8522"},"_id":"bfuWuYgRs","items":[{"description":"item #1","amount":1}],"totalAmount":1,"paidAmount":0,"created":1548735086893,"state":"pending","__v":0}
107 | 
108 | Upon creation, an invoice gets linked with a deposit address generated by DecentraPay server. Private keys are stored in the local database in plain text format.
109 | 
110 | 
111 | Newly created invoices have *pending* state.  After an invoice is paid its state will be changed to *confirming*. Then the server waits for the number of blocks specified in the configuration as minConfirmations (default is 1) and if thereafter the invoice balance is not less than totalAmount, the server changes the invoice state to *paid* and notifies the app via callback that the payment was done. The app should return HTTP code 200 to acknowledge that the invoice was processed. Then the invoice status is changed to *closed*.
112 | 
113 | If the invoice was not paid on time, as configured by the *expires* property, its status will be set to *expired* and no callbacks will be called thereafter.
114 | 
115 | ## Maintainence
116 | 
117 | ### Collecting payments 
118 | Until it is possible to [pay for gas with tokens](https://github.com/ethereum/EIPs/issues/865) on the Ethereum network, collecting and forwarding payments can be a bit challenge because generated wallets need gas in order to be able to transfer DAI. For that purpose, Decentrapay includes a tool named *wallets* that funds wallets with small amounts of ETH if needed and then transfer tokens out.
119 | 
120 | Example command usage:
121 |    
122 |     npm run wallets --  --fundamount 0.001 --collect <YOUR ETHEREUM ADDRESS> --privatekey 4e4a0db6ee08f21c68923f9a068a40c97769796fc88232c465a932d102a6eab4
123 | 
124 | the *collect* parameter specifies the destination address for collected payments and the *privatekey* is a private key of any account with small amount of ETH (it can be a key exported from MetaMask, for example). In the result, each non-empty wallet that linked to a closed invoice will be funded with 0.001 ETH if needed and then DAI tokens be transferred out to the specified address. Released wallets will be then re-used by the backend because there is a high chance they still have gas.
125 | 
126 | 
127 | **IMPORTANT**: Be careful when using this tool - any mistake may result in lost funds. Do not use accounts with large amounts of ETH.
128 | 
129 | 
130 | ## TODO
131 | - Adding a project logo
132 | - Point-of-Sale mode
133 | 
134 | 
135 | ## CREDITS
136 | - Inspired by [Baron](https://github.com/baronpay/baron) project
137 | 


--------------------------------------------------------------------------------
/test/ERC20.bin:
--------------------------------------------------------------------------------
1 | 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


--------------------------------------------------------------------------------