Exchange API Rate Limiting System Development

Crypto Exchange Admin Panel Development

An exchange's administrative panel is the operational center for management. Operators monitor trading, support team handles tickets, compliance officer checks suspicious transactions, finance team manages reserves. One tool for everything means proper role system and clear access separation.

Role Architecture and Permissions

RBAC (Role-Based Access Control)

type Permission string

const (
    // Users
    ViewUsers      Permission = "users:view"
    EditUsers      Permission = "users:edit"
    FreezeUsers    Permission = "users:freeze"
    
    // KYC/AML
    ViewKYC        Permission = "kyc:view"
    ApproveKYC     Permission = "kyc:approve"
    ViewAML        Permission = "aml:view"
    ManageAML      Permission = "aml:manage"
    
    // Trading
    ViewOrders     Permission = "orders:view"
    CancelOrders   Permission = "orders:cancel"
    
    // Finance
    ViewBalances   Permission = "finance:view"
    ViewWithdrawals Permission = "finance:withdrawals:view"
    ApproveWithdrawals Permission = "finance:withdrawals:approve"
    
    // System
    ViewSystemMetrics Permission = "system:metrics"
    ManageConfig      Permission = "system:config"
    ManageTradingPairs Permission = "markets:manage"
)

type Role struct {
    Name        string
    Permissions []Permission
}

var Roles = map[string]Role{
    "super_admin": {
        Name: "Super Admin",
        Permissions: AllPermissions,
    },
    "compliance": {
        Name: "Compliance Officer",
        Permissions: []Permission{
            ViewUsers, ViewKYC, ApproveKYC, ViewAML, ManageAML,
            ViewOrders, ViewBalances, ViewWithdrawals,
        },
    },
    "support": {
        Name: "Support Agent",
        Permissions: []Permission{
            ViewUsers, ViewOrders, ViewKYC,
        },
    },
    "finance": {
        Name: "Finance",
        Permissions: []Permission{
            ViewBalances, ViewWithdrawals, ApproveWithdrawals,
        },
    },
    "marketing": {
        Name: "Marketing",
        Permissions: []Permission{
            ViewUsers, // read-only analytics
        },
    },
}

Key Admin Panel Modules

Dashboard — Main Screen

interface DashboardMetrics {
  // Trading
  volume24h: string;
  trades24h: number;
  activeUsers24h: number;
  
  // Finance
  totalDeposits24h: string;
  totalWithdrawals24h: string;
  pendingWithdrawals: number;
  pendingWithdrawalsUSD: string;
  
  // KYC
  pendingKYCApprovals: number;
  
  // System
  matchingEngineLatency: number;  // ms
  wsConnections: number;
  apiRps: number;
  
  // Alerts
  activeAlerts: SystemAlert[];
}

function AdminDashboard() {
  const { data } = useQuery('dashboard-metrics', fetchMetrics, {
    refetchInterval: 30000,  // refresh every 30 sec
  });
  
  return (
    <Grid>
      <MetricCard title="24h Volume" value={data?.volume24h} trend={data?.volumeTrend} />
      <MetricCard title="Pending Withdrawals" value={data?.pendingWithdrawalsUSD} 
                  alert={data?.pendingWithdrawals > 50} />
      <MetricCard title="KYC Queue" value={data?.pendingKYCApprovals} />
      <ActiveAlerts alerts={data?.activeAlerts} />
      <RecentTradesTable />
      <SystemHealthIndicators />
    </Grid>
  );
}

User Management

function UserManagement() {
  const [filters, setFilters] = useState({
    search: '',
    kycStatus: 'all',
    frozen: false,
    country: '',
  });
  
  return (
    <div>
      <UserFilters filters={filters} onChange={setFilters} />
      
      <DataTable
        columns={[
          { key: 'id', label: 'ID' },
          { key: 'email', label: 'Email' },
          { key: 'fullName', label: 'Name' },
          { key: 'kycTier', label: 'KYC Tier', render: (v) => <KYCBadge tier={v} /> },
          { key: 'registeredAt', label: 'Registered', render: (v) => formatDate(v) },
          { key: 'volume30d', label: '30d Volume' },
          { key: 'status', render: (_, row) => <UserStatusActions user={row} /> },
        ]}
        fetchData={(params) => fetchUsers({ ...params, ...filters })}
        onRowClick={(user) => openUserDetail(user.id)}
      />
    </div>
  );
}

function UserDetail({ userId }: { userId: number }) {
  const { data: user } = useQuery(['user', userId], () => fetchUser(userId));
  
  return (
    <Tabs>
      <Tab label="Overview">
        <UserInfo user={user} />
        <BalanceSummary userId={userId} />
      </Tab>
      <Tab label="KYC Documents">
        <KYCDocumentViewer userId={userId} />
        <KYCApprovalActions userId={userId} />
      </Tab>
      <Tab label="Orders">
        <OrderHistory userId={userId} />
      </Tab>
      <Tab label="Transactions">
        <TransactionHistory userId={userId} />
      </Tab>
      <Tab label="Activity Log">
        <UserActivityLog userId={userId} />
      </Tab>
      <Tab label="Actions">
        <FreezeAccount userId={userId} />
        <AdjustBalance userId={userId} />
        <AddKYCNote userId={userId} />
      </Tab>
    </Tabs>
  );
}

Withdrawal Management

Large withdrawals require manual approval. Interface for compliance/finance team:

function WithdrawalQueue() {
  const { data: withdrawals } = useQuery('pending-withdrawals', fetchPendingWithdrawals);
  
  return (
    <div>
      <StatsBar
        total={withdrawals?.total}
        totalUSD={withdrawals?.totalUSD}
        flagged={withdrawals?.flaggedCount}
      />
      
      {withdrawals?.items.map(w => (
        <WithdrawalCard key={w.id} withdrawal={w}>
          <UserRiskIndicator userId={w.userId} />
          <AMLCheckResult withdrawalId={w.id} />
          <BlockchainAddressInfo address={w.address} />
          
          <ActionButtons>
            <ApproveButton withdrawalId={w.id} requiresReason={w.amount > 10000} />
            <RejectButton withdrawalId={w.id} />
            <FlagForReviewButton withdrawalId={w.id} />
          </ActionButtons>
        </WithdrawalCard>
      ))}
    </div>
  );
}

Admin Panel Security

2FA Required for All Operators

function RequireRecentMFA({ children }: { children: React.ReactNode }) {
  const { lastMFAAt } = useAdminSession();
  const isRecent = lastMFAAt && Date.now() - lastMFAAt < 30 * 60 * 1000; // 30 minutes
  
  if (!isRecent) {
    return <MFAChallengeModal onSuccess={refreshSession} />;
  }
  
  return <>{children}</>;
}

Admin Audit Log

Every operator action is logged:

type AdminAuditEntry struct {
    AdminID    int64
    AdminEmail string
    Action     string    // "approve_withdrawal", "freeze_user", "update_config"
    EntityType string    // "withdrawal", "user", "trading_pair"
    EntityID   string
    Before     string    // JSON state before change
    After      string    // JSON state after
    IPAddress  string
    CreatedAt  time.Time
}

IP Restriction

Admin panel accessible only from corporate VPN or fixed IPs.

Tech Stack

Development Timeline

Full administrative panel: 3–4 months.