Bitcoin Privacy Fundamentals

// Bitcoin Privacy Fundamentals Checklist
const privacyChecklist = {
  addressManagement: {
    neverReuseAddresses: false,
    generateNewAddresses: false,
    separateWalletIdentities: false,
    avoidAddressClustering: false
  },
  transactionPatterns: {
    varyTransactionSizes: false,
    avoidRoundNumbers: false,
    spaceTransactionsInTime: false,
    mixUnrelatedActivities: false
  },
  informationHygiene: {
    avoidPublicWalletSharing: false,
    protectPersonalInformation: false,
    secureBackupPhrases: false,
    useTorForTransactions: false
  },
  exchangeInteractions: {
    separateExchangeWallets: false,
    avoidDirectDeposits: false,
    useMultipleExchanges: false,
    timeDelaysBetweenTransfers: false
  }
};

function validatePrivacyPractices(checklist) {
  const recommendations = [];
  
  // Address management checks
  if (!checklist.addressManagement.neverReuseAddresses) {
    recommendations.push("CRITICAL: Address reuse is the biggest privacy leak - generate new addresses for every transaction");
  }
  
  if (!checklist.addressManagement.separateWalletIdentities) {
    recommendations.push("Use separate wallets for different purposes (personal vs business vs public donations)");
  }
  
  // Transaction pattern checks
  if (!checklist.transactionPatterns.varyTransactionSizes) {
    recommendations.push("Vary transaction amounts to avoid fingerprinting based on spending patterns");
  }
  
  if (!checklist.transactionPatterns.avoidRoundNumbers) {
    recommendations.push("Avoid round numbers (1.0, 0.5 BTC) as they are easily identifiable");
  }
  
  // Information hygiene checks
  if (!checklist.informationHygiene.useTorForTransactions) {
    recommendations.push("Consider using Tor or VPN when interacting with Bitcoin services");
  }
  
  // Exchange interaction checks
  if (!checklist.exchangeInteractions.separateExchangeWallets) {
    recommendations.push("Never send directly from exchange to recipient - always use intermediate wallet");
  }
  
  return {
    privacyScore: calculatePrivacyScore(checklist),
    recommendations: recommendations,
    criticalIssues: recommendations.filter(rec => rec.includes("CRITICAL"))
  };
}

function calculatePrivacyScore(checklist) {
  let score = 0;
  let total = 0;
  
  Object.values(checklist).forEach(category => {
    Object.values(category).forEach(item => {
      total++;
      if (item) score++;
    });
  });
  
  return Math.round((score / total) * 100);
}

// Usage example
const privacyAssessment = validatePrivacyPractices(privacyChecklist);
console.log("Privacy Assessment:", privacyAssessment);