#!/bin/bash
# peer-filter.sh - Disconnect high-ping peers (Docker version)

THRESHOLD=1.0 # seconds
CONTAINER="bitcoin-node"

# Fetch peers using docker exec
for peer in $(docker exec -i $CONTAINER bitcoin-cli -conf=/bitcoin/bitcoin.conf -datadir=/bitcoin getpeerinfo | jq -c '.[]'); do
  ping=$(echo "$peer" | jq '.pingtime')
  addr=$(echo "$peer" | jq -r '.addr')
 
  # If pingtime is above threshold, disconnect
  if (( $(echo "$ping > $THRESHOLD" | bc -l) )); then
    echo "🚫 Disconnecting $addr (ping: $ping)"
    docker exec -i $CONTAINER bitcoin-cli -conf=/bitcoin/bitcoin.conf -datadir=/bitcoin disconnectnode "$addr"
  fi
done

...
🚫 Disconnecting 123.100.246.248:8333 (ping: 6.793595)
🚫 Disconnecting 203.11.72.218:8333 (ping: 2.599044)
...

[Unit]
Description=CKPool Solo - Lightweight Stratum server for Bitcoin solo mining
After=network.target
Wants=network-online.target

[Service]
# User and group to run ckpool (create a dedicated user for security)
User=ckpool
Group=ckpool

# Working directory where ckpool binary resides
WorkingDirectory=/opt/ckpool

# Environment variables
Environment="CKPOOL_DIR=/opt/ckpool"
Environment="CKPOOL_CONF=/etc/ckpool/ckpool.conf"
Environment="CKPOOL_LOG=/var/log/ckpool/ckpool.log"

# Start command
ExecStart=/opt/ckpool/src/ckpool -k -B -c ${CKPOOL_CONF}

# Restart behavior
Restart=always
RestartSec=5

# Resource limits
LimitNOFILE=65535

# Logging
StandardOutput=append:${CKPOOL_LOG}
StandardError=append:${CKPOOL_LOG}

[Install]
WantedBy=multi-user.target