1 postgresql needs to be implemented

.env

@@ -1 +1,5 @@
-MONGO_URL=mongodb://mongo:27017/crpyto
+DB_DATABASE=transactions
+DB_USER=postgres
+DB_PASSWORD=postgres
+DB_HOST=db
+DB_PORT=5432

.github/workflows/integrate.yml

@@ -0,0 +1,16 @@
+name: Continuous Integration
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  test_pull_request:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 14
+      - run: npm ci
+      - run: npm test

Dockerfile

@@ -4,6 +4,8 @@ WORKDIR /app
 
 COPY . ./
 
+COPY package.json ./
+
 RUN npm install
 
 CMD [ "npm", "start" ]

README.md

@@ -1,3 +1,11 @@
+## Usage
+
+To see the result run:
+
+```bash
+docker-compuse up
+```
+
 # Crypto/Payments Test
 
 we receive thousands of deposits from customers per day. This test is designed to test your ability to work with a transaction set that could get returned by a blockchain daemon like bitcoind.

app/transactions.test.ts

@@ -0,0 +1,61 @@
+import Transactions from './transactions';
+import { ITransaction, IKeyValue } from './types';
+import { Pool } from 'pg'
+
+const transaction = new Transactions(new Pool());
+
+describe('Transactions', () => {
+  test('Should remove duplicated data', () => {
+    const testDuplicatedData: ITransaction[] = [{
+      "involvesWatchonly": true,
+      "account": "",
+      "address": "myAre6hq8uSDAzhmNit1fjkTeajebBzrKZ",
+      "category": "receive",
+      "amount": 36.9759613,
+      "label": "",
+      "confirmations": 42,
+      "blockhash": "ceea46e555518b0c7e858476ca2259b1ca91832ea6b35a8e135ac30d9ab7360b",
+      "blockindex": 59,
+      "blocktime": 1627633348873,
+      "txid": "697c9b177ffd64ce3a9ed4814c08d95254095863f3b07867f7fe0f457c474be2",
+      "vout": 5,
+      "walletconflicts": [],
+      "time": 1627633337048,
+      "timereceived": 1627633337048,
+    },
+    {
+      "involvesWatchonly": true,
+      "account": "",
+      "address": "mzzg8fvHXydKs8j9D2a8t7KpSXpGgAnk4n",
+      "category": "receive",
+      "amount": 9.19,
+      "label": "",
+      "confirmations": 2,
+      "blockhash": "8aa7f8a5d5db094089dcbfbada744f0542e02d01d12c76c0c3ad039afa63ef5b",
+      "blockindex": 41,
+      "blocktime": 1627657348873,
+      "txid": "697c9b177ffd64ce3a9ed4814c08d95254095863f3b07867f7fe0f457c474be2",
+      "vout": 9,
+      "walletconflicts": [],
+      "time": 1627657303461,
+      "timereceived": 1627657303461,
+    }]
+
+    const transactions: Array<ITransaction> = transaction.removeDuplicates(testDuplicatedData);
+    expect(transactions.length).toBe(1)
+  })
+
+  test('Should return transactions', () => {
+    const users: IKeyValue = transaction.getTransactions();
+    expect(users.values.length).toBeGreaterThan(0)
+  })
+})
+
+
+describe('Users', () => {
+  test('Should return users', () => {
+    const totalUserAmount = 7;
+    const users: IKeyValue = transaction.getUsers();
+    expect(users.values.length).toBe(totalUserAmount)
+  })
+})