import JSBI from 'jsbi';
/**
 * Provides functions for computing liquidity amounts
 */
export declare abstract class LiquidityMath {
    /**
     * Cannot be constructed
     */
    private constructor();
    /**
     * Adds a signed liquidity delta to liquidity
     * @param x The starting liquidity
     * @param y The delta to add
     * @returns The result
     */
    static addDelta(x: JSBI, y: JSBI): JSBI;
}
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