Linux CLI Push Notification Setup - Pulsar-Coin/Pulsar-Coin-Cryptocurrency GitHub Wiki

Linux CLI Wallet - Push Notifications for Staking

Requirements

You will need a free Pushover account (https://pushover.net/) for the push notifications. Any other push service API could also work, but for the purposes of this guide we'll use Pushover. You will need your "User Key" and an "API Token/Key" from your Pushover account. You will also need at least 1 device registered with Pushover to receive push notifications, details can be found in Pushover's documentation.

Pushover Script Setup

  1. Install wget if it's not already installed:
sudo apt install wget -y
  1. Create the pushover script in /usr/local/bin/:
sudo nano /usr/local/bin/pushover
  1. Paste the following into the new file, inserting your own values for APP_TOKEN and USER_TOKEN:
#!/bin/bash

if [ $# -eq 0 ]; then
       echo "Usage: pushover <message> [title]"
       exit
fi

MESSAGE=$1
TITLE=$2

if [ $# -lt 2 ]; then
       TITLE="`whoami`@${HOSTNAME}"
fi

APP_TOKEN="xxxxxxxxxx"
USER_TOKEN="xxxxxxxxxx"

wget https://api.pushover.net/1/messages.json --post-data="token=$APP_TOKEN&user=$USER_TOKEN&message=$MESSAGE&title=$TITLE" -qO- > /dev/null 2>&1 &
  1. Hit Ctrl+O and Enter to save your changes, then Ctrl+X to close the file.
  2. Make the script executable:
sudo chmod +x /usr/local/bin/pushover
  1. Test push notifications:
pushover "This is a test message"
  1. You should receive a push notification within a few seconds. If not, make sure you pasted the correct User and API key. Note: You can now use the pushover command to send push notifications from any script or terminal on this PC.

Staking Reward Script Setup

  1. Install one dependency jq:
sudo apt install jq -y
  1. Create a new directory to store the script and files:
mkdir ~/pulsar-scripts && cd ~/pulsar-scripts
  1. Create the script file:
nano pulsar_wallet_push.sh
  1. Paste the following into the new file, changing the two path variables if you chose different names:
#!/bin/bash

# Paths, change if you chose different names/locations
PULSARDIR=~
SCRIPTDIR=~/pulsar-scripts

# Files
BLOCKHASHFILE="$SCRIPTDIR/blockhashes.txt"

touch $BLOCKHASHFILE

# Variables
CURRENTTIME=$(date +%s)
UNLOCKEDTIME=`$PULSARDIR/pulsar-cli getwalletinfo | jq '.unlocked_until'`
TIMEDIFF=$(expr $UNLOCKEDTIME - $CURRENTTIME)
TIMEDIFFMIN=$(expr $TIMEDIFF / 60)
TIMEDIFFHOUR=$(expr $TIMEDIFF / 60 / 60)
TIMEDIFFDAY=$(expr $TIMEDIFF / 60 / 60 / 24)
BLOCKHASHES=`$PULSARDIR/pulsar-cli listtransactions | jq '.[] | select(.category=="stake-mint") | .blockhash'`

# Warn if wallet is not unlocked for staking
if [ $TIMEDIFF -le 0 ]; then
   pushover "WARNING: Pulsar wallet is locked, not staking!"
   echo "WARNING: Pulsar wallet is locked, not staking!"

# If wallet unlocked time remaining is less than 12 hours, send push
elif [ $TIMEDIFFHOUR -lt 12 ]; then
   pushover "WARNING: Pulsar wallet locking in $TIMEDIFFHOUR hours!"
   echo  "WARNING: Pulsar wallet locking in $TIMEDIFFHOUR hours!"

else
   echo "Wallet unlocked for $TIMEDIFFDAY more days, until $(date --date=@$UNLOCKEDTIME)"
fi


# If any of the block hashes were not previously logged, send a push for each new block
for i in $BLOCKHASHES; do
   if [ $(grep -c $i $BLOCKHASHFILE) -eq 0 ]; then
       echo "PoS block found with hash $i"
       pushover "PoS block found with hash $i"
   fi
done

echo $BLOCKHASHES > $BLOCKHASHFILE
  1. Hit Ctrl+O and Enter to save your changes, then Ctrl+X to close the file.
  2. Make the script executable:
chmod +x pulsar_wallet_push.sh
  1. Run the script once manually to make sure there are no errors:
./pulsar_wallet_push.sh
  1. If you already had staking rewards you should see push notifications for each of them now. Otherwise you should only see the message with the wallet unlock timeout info.

Cron Job Setup

  1. Edit your crontab file:
crontab -e

Note: If this is the first time you've edited your crontab you will be prompted to choose an editor. In this example I will use nano.

  1. Scroll to the bottom of the crontab file and paste one of the following lines according to how often you would like to check for PoS blocks.

Run every 15 minutes:

*/15 * * * * ~/pulsar-scripts/pulsar_wallet_push.sh

Run every 1 hour:

* */1 * * * ~/pulsar-scripts/pulsar_wallet_push.sh
  1. Hit Ctrl+O and Enter to save your changes, then Ctrl+X to close the file.

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