/** Display formatter: truncates to `decimals` and adds thousands separators (returns a
 * localized string, e.g. "1,234.56"). Use for UI text, not for amount math. */
export declare function truncateDecimals(value: number, decimals?: number): string;
/** Ceil to `decimals` (number in, number out). Values already representable at
 * `decimals` pass through unchanged — a raw `Math.ceil(value * factor)` would
 * bump them a full step up on float dust (0.1 * 1e6 === 100000.00000000001). */
export declare function ceilToDecimals(value: number, decimals: number): number;
/**
 * Amount floor: truncates a decimal string to `decimals` with no separators (returns a
 * plain string). String-based for the common case to avoid float precision loss, with a
 * numeric fallback for scientific notation. Use for on-chain/transfer amounts.
 */
export declare function truncateToDecimals(value: string, decimals: number): string;
/** Numeric round to `decimals` (number in, number out). Non-finite inputs (e.g. Infinity
 * from a divide-by-zero price) return 0 — isNaN() misses Infinity. */
export declare function roundToDecimals(value: number, decimals: number | undefined): number;
export declare function isScientific(x: any): boolean;
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