implement .env and remove local packages

Author: Simon Goldberg

lib/bitcoin-core/.env

@@ -0,0 +1,8 @@
+INSTANCE_CLASS=T3A
+INSTANCE_SIZE=LARGE
+EBS_VOLUME_SIZE=1000
+EBS_VOLUME_TYPE=GP3
+
+ASG_MIN_CAPACITY=2
+ASG_MAX_CAPACITY=4
+ASG_DESIRED_CAPACITY=2

lib/bitcoin-core/README.md

@@ -58,7 +58,7 @@ npx cdk deploy HABitcoinCoreNodeStack
 
 #### Single Node Setup
 
-- A **Bitcoin node** deployed in a **public subnet** continuously synchronizes with the Bitcoin network using outbound connections through a **NAT Gateway**.
+- A **Bitcoin node** deployed in a **private subnet** continuously synchronizes with the Bitcoin network using outbound connections through a **NAT Gateway**.
 - Outbound communication flows through an **Internet Gateway (IGW)**, but the node itself does not have a **public IP address** or **Elastic IP (EIP)**.
 - The **NAT Gateway** translates the node's private IP into a public IP for outbound connections, but inbound connections are blocked. This ensures that the node functions as an **outbound-only node** (i.e., it does not accept inbound peer connections), increasing security and reducing data transfer costs.
 

lib/bitcoin-core/generateRPCAuth.js

@@ -36,7 +36,7 @@ function genRpcAuth(username = genUser(), password = genPass(), salt = genSalt()
 }
 
 function writeRpcAuthToConf(rpcauthStr) {
-    const confPath = 'lib/bitcoin.conf';
+    const confPath = 'lib/bitcoin-core/lib/bitcoin.conf';
     try {
         fs.writeFileSync(confPath, rpcauthStr + '\n', { flag: 'a' });
         console.log(`Successfully wrote to ${confPath}`);

lib/bitcoin-core/lib/bitcoin.conf

@@ -2,4 +2,4 @@ server=1
 rpcallowip=0.0.0.0/0
 txindex=1
 rpcbind=0.0.0.0:8332
-datadir=/home/bitcoin/.bitcoin
+datadir=/home/bitcoin/.bitcoin

lib/bitcoin-core/lib/ha-node-stack.js

@@ -7,6 +7,19 @@ const path = require('path');
 const fs = require('fs');
 const { AwsSolutionsChecks, NagSuppressions } = require('cdk-nag');
 const { Aspects } = require('aws-cdk-lib');
+require('dotenv').config();
+
+//Parse env variables
+const {
+    INSTANCE_CLASS,
+    INSTANCE_SIZE,
+    EBS_VOLUME_SIZE,
+    EBS_VOLUME_TYPE,
+    ASG_MIN_CAPACITY,
+    ASG_MAX_CAPACITY,
+    ASG_DESIRED_CAPACITY
+} = process.env;
+
 
 class HABitcoinCoreNodeStack extends cdk.Stack {
     constructor(scope, id, props) {
@@ -93,15 +106,18 @@ class HABitcoinCoreNodeStack extends cdk.Stack {
 
         // Create Launch Template
         const launchTemplate = new ec2.LaunchTemplate(this, 'BitcoinLaunchTemplate', {
-            instanceType: ec2.InstanceType.of(ec2.InstanceClass.T3A, ec2.InstanceSize.LARGE),
+            instanceType: ec2.InstanceType.of(
+                ec2.InstanceClass[INSTANCE_CLASS],
+                ec2.InstanceSize[INSTANCE_SIZE]
+            ),
             machineImage: ec2.MachineImage.latestAmazonLinux2(),
             userData,
             role,
             securityGroup: ec2Sg,
             blockDevices: [{
                 deviceName: '/dev/xvda',
-                volume: ec2.BlockDeviceVolume.ebs(1000, {
-                    volumeType: ec2.EbsDeviceVolumeType.GP3,
+                volume: ec2.BlockDeviceVolume.ebs(Number(EBS_VOLUME_SIZE), {
+                    volumeType: ec2.EbsDeviceVolumeType[EBS_VOLUME_TYPE],
                     encrypted: true,
                 }),
             }],
@@ -111,9 +127,9 @@ class HABitcoinCoreNodeStack extends cdk.Stack {
         const asg = new autoscaling.AutoScalingGroup(this, 'BitcoinASG', {
             vpc,
             launchTemplate: launchTemplate,
-            minCapacity: 2,
-            maxCapacity: 4,
-            desiredCapacity: 2,
+            minCapacity: Number(ASG_MIN_CAPACITY),
+            maxCapacity: Number(ASG_MAX_CAPACITY),
+            desiredCapacity: Number(ASG_DESIRED_CAPACITY),
         });
 
         // Attach the ASG to the Target Group

lib/bitcoin-core/lib/single-node-stack.js

@@ -6,7 +6,15 @@ const path = require('path');
 const fs = require('fs');
 const { AwsSolutionsChecks, NagSuppressions } = require('cdk-nag');
 const { Aspects } = require('aws-cdk-lib');
+require('dotenv').config();
 
+//Parse env variables
+const {
+    INSTANCE_CLASS,
+    INSTANCE_SIZE,
+    EBS_VOLUME_SIZE,
+    EBS_VOLUME_TYPE,
+} = process.env;
 
 class SingleNodeBitcoinCoreStack extends cdk.Stack {
     constructor(scope, id, props) {
@@ -60,14 +68,17 @@ class SingleNodeBitcoinCoreStack extends cdk.Stack {
         // EC2 Instance
         const instance = new ec2.Instance(this, 'BitcoinSingleNode', {
             vpc,
-            instanceType: ec2.InstanceType.of(ec2.InstanceClass.T3A, ec2.InstanceSize.LARGE),
+            instanceType: ec2.InstanceType.of(
+                ec2.InstanceClass[INSTANCE_CLASS],
+                ec2.InstanceSize[INSTANCE_SIZE]
+            ),
             machineImage: ec2.MachineImage.latestAmazonLinux2(),
             role,
             securityGroup: sg,
             blockDevices: [{
                 deviceName: '/dev/xvda',
-                volume: ec2.BlockDeviceVolume.ebs(1000, {
-                    volumeType: ec2.EbsDeviceVolumeType.GP3,
+                volume: ec2.BlockDeviceVolume.ebs(Number(EBS_VOLUME_SIZE), {
+                    volumeType: ec2.EbsDeviceVolumeType[EBS_VOLUME_TYPE],
                     encrypted: true,
                 }),
             }],