#!/bin/bash

# Set up a Decred node.
#
# Debian or Ubuntu AMD64 (x86_64) server/VPS recommended.
#
# To use run:
# curl -L https://node.dcr.pw | bash
#
# Check it's running with:
# systemctl status dcrd
# Or run decred.sh to view the output of dcrd.log in real-time.

# Get permissions.
sudo -s

# Set CPU architecture, Decred version, binaries archive name, logo.
arch=$(uname -m)

if [ "$arch" == 'x86_64' ]; then
    a=amd64
fi

if [ "$arch" == 'aarch64' ]; then
    a=arm64
fi

if [ "$arch" == 'armv7l' ]; then
    a=arm
fi
v=v2.0.1
b=decred-linux-${a}-${v}.tar.gz
l=$(exec base64 -d <<<"H4sIAAAAAAAAA52TP2/DIBDFd3+K2xiKL21HqLKkY4cq6mZ1qAAlkVCoDEn98Rv+GWxHbdM3GQS/
e353NDAKs8YNWoQwU/sHNRWcM+HFM4hoWWTKflAHz0r0SsLRSAXWfbiTndV/byZLpJHPSOaLgh8G
KQq/Ayl6CedHvMeH+W9dhXtcwucgMKy1SXhe4L9qAUfKWcTPYggZDcOQ6R3snfu0bLWSIR40/e5H
OBKWNU0niEXv/3R+6WgQp5Qk1eYxJo8Z3sL2dITk2+7BGTgf1FfoBWqzm8CRc09fTl1S6u3ovIXX
XlkLT5u37csa7i4fa19BDQe3cE65F71ORm4iu2R+UywRXseMqbVpWPy0j7VvfEQkwKczQrVJ8mjN
6xZFM5xMh0qk85pifTjBfTTVHeSRrxnOHlw5H+7kGtmPwMUbQiT0yo1kSArSfAMX1JvnjgQAAA==" | gunzip)

# Show logo
printf "$l \n\n"

# Download Decred binaries archive.
curl -L -O https://github.com/decred/decred-binaries/releases/download/${v}/${b}

# Extract Decred binaries.
tar -xf ${b} --strip-components 1 -C /usr/local/bin/

# Stop existing dcrd instance.
systemctl status dcrd.service >/dev/null && systemctl stop dcrd.service

# Create dcrd service.
cat > /etc/systemd/system/dcrd.service <<EOF
[Unit]
Description=dcrd

[Service]
Type=simple
ExecStart=dcrd --appdata=/root/.dcrd
Restart=on-abnormal

[Install]
WantedBy=multi-user.target
EOF

# Enable + (re)start service.
systemctl enable dcrd
systemctl restart dcrd

# Create status script.
cat > /usr/local/bin/decred.sh <<EOF
printf "${l} \n\n"

sudo tail -f /root/.dcrd/logs/mainnet/dcrd.log
EOF

chmod +x /usr/local/bin/decred.sh

printf "\n**********\nInstallation complete, enjoy your new Decred node! \nYou can monitor its status by using the decred.sh command.\n**********\n\n"