stratum working, implement mining pool, support "extranonce"

MINE/rin/start_mining_pool.sh

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+#!/bin/bash
+
+# RinCoin Mining Pool Server Startup Script
+# Distributes block rewards among multiple miners
+
+echo "=== RinCoin Mining Pool Server ==="
+echo ""
+
+# Check if RinCoin node is running
+echo "Checking RinCoin node status..."
+if ! curl -s -u rinrpc:745ce784d5d537fc06105a1b935b7657903cfc71a5fb3b90 \
+    -H 'content-type: text/plain' \
+    --data '{"jsonrpc":"1.0","id":"curl","method":"getblockchaininfo","params":[]}' \
+    http://127.0.0.1:9556/ > /dev/null; then
+    echo "❌ RinCoin node is not running!"
+    echo "Start it first with: docker start rincoin-node"
+    exit 1
+fi
+
+echo "✅ RinCoin node is running"
+
+# Check Python dependencies
+echo "Checking Python dependencies..."
+python3 -c "import requests, sqlite3" 2>/dev/null || {
+    echo "Installing python3-requests..."
+    sudo apt-get update && sudo apt-get install -y python3-requests
+}
+
+echo "✅ Python dependencies ready"
+
+# Check if port 3333 is already in use
+if netstat -tln | grep -q ":3333 "; then
+    echo ""
+    echo "⚠️  Port 3333 is already in use!"
+    echo ""
+    echo "🔍 Process using port 3333:"
+    sudo netstat -tlnp | grep ":3333 " || echo "Could not determine process"
+    echo ""
+    echo "🛑 To kill existing process:"
+    echo "sudo lsof -ti:3333 | xargs sudo kill -9"
+    echo ""
+    read -p "Kill existing process and continue? (y/N): " -n 1 -r
+    echo
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+        echo "Killing processes using port 3333..."
+        sudo lsof -ti:3333 | xargs sudo kill -9 2>/dev/null || echo "No processes to kill"
+        sleep 2
+    else
+        echo "Exiting..."
+        exit 1
+    fi
+fi
+
+echo ""
+echo "🚀 Starting Mining Pool Server..."
+echo "This will distribute block rewards among multiple miners"
+echo ""
+echo "Pool Features:"
+echo "- Multiple miner support"
+echo "- Share-based reward distribution"
+echo "- Pool fee: 1%"
+echo "- Real-time statistics"
+echo ""
+
+echo "After it starts, miners can connect with:"
+echo "./cpuminer -a rinhash -o stratum+tcp://YOUR_IP:3333 -u username.workername -p x"
+echo ""
+echo "Press Ctrl+C to stop the pool"
+
+# Start the mining pool
+python3 MINE/rin/stratum_pool.py