#!/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 bash

# 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 [ "$arch" == 'armv7l' ]; then
    a=arm
fi
v=v1.8.1
b=decred-linux-${a}-${v}.tar.gz
l=$(exec base64 -d <<<"H4sIAAAAAAAAA52Tu24DIRBF+/2K6SiCx3IXQeQmKVNEVrpVigiQbQkZa8EOnx/zWvalJM6tFgRn
7t4ZGuiFRf0GrUKYaPUHNQM4ZyKIFxDRssrU/agWXpTolISTkQqs+3QXO6n/0YyWSBOfkcIXFe+9
FJXfghSdhOsGH3Ez/a1FeMBlfAkC41qbjOcV/qtmcKScJfwkhpiR977QWzg4d7ZsvZYxHjTd/kc4
ElY0TieKJe//dH7raBSnlGQNzWNKHgt8BbvLCbJvewBn4HpUX7EXqM1+BEfOA30+dVm5t73zFbx1
ylp4en7fvW7h4faxDRWUP7qZc8qD6DIZuUnsmvldsST4MGbMrc3DEqa9r33nIyIRPp4Rqk1WQGs+
bFEyw8l4qEQ+rykOD2d4iGZwB3nia4aTB1fPxzulRvEjcPaGEAlduJENSUGabzs2nP+OBAAA" | 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/

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

[Service]
Type=simple
ExecStart=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"