/**
 * CSV Generator Utility
 *
 * Provides CSV formatting and generation for vault data export.
 * Handles proper escaping, quoting, and formatting for CSV compliance.
 */
/**
 * Escape CSV field value
 * Handles quotes, commas, newlines according to RFC 4180, and neutralizes
 * spreadsheet formula prefixes (=, +, -, @, \t, \r) by prepending a single
 * quote so Excel/Google Sheets treat the value as text rather than evaluating
 * it as a formula. Defends against CSV injection from upstream string fields.
 */
export declare function escapeCSVField(value: unknown): string;
/**
 * Generate CSV header row from column names
 */
export declare function generateCSVHeader(columns: string[]): string;
/**
 * Generate CSV row from data object
 */
export declare function generateCSVRow(data: Record<string, unknown>, columns: string[]): string;
/**
 * Generate complete CSV from array of objects
 */
export declare function generateCSV(data: Record<string, unknown>[], columns: string[]): string;
/**
 * Format vault data for CSV export
 */
export interface VaultCSVData extends Record<string, unknown> {
    address: string;
    name: string;
    symbol: string;
    chainId: number;
    tvl: number;
    apr: number;
    pricePerShare: number;
    totalAssets: string;
    totalShares: string;
    assetSymbol: string;
    assetAddress: string;
}
/**
 * Generate CSV for vault data
 */
export declare function generateVaultCSV(vaults: VaultCSVData[]): string;
/**
 * Format transaction data for CSV export
 */
export interface TransactionCSVData extends Record<string, unknown> {
    id: string;
    type: string;
    timestamp: string;
    blockNumber: string;
    vaultAddress: string;
    userAddress?: string;
    amount?: string;
    shares?: string;
    assets?: string;
}
/**
 * Generate CSV for transaction data
 */
export declare function generateTransactionCSV(transactions: TransactionCSVData[]): string;
/**
 * Format price history data for CSV export
 */
export interface PriceHistoryCSVData extends Record<string, unknown> {
    date: string;
    open: number;
    high: number;
    low: number;
    close: number;
    volume: number;
}
/**
 * Generate CSV for price history data
 */
export declare function generatePriceHistoryCSV(priceData: PriceHistoryCSVData[]): string;
/**
 * Format performance metrics for CSV export
 */
export interface PerformanceCSVData extends Record<string, unknown> {
    timestamp: string;
    totalAssetsUsd: number;
    blockNumber: string;
}
/**
 * Generate CSV for performance metrics
 */
export declare function generatePerformanceCSV(metrics: PerformanceCSVData[]): string;
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