/**
 * Validates that the amount is a positive string with max decimal places
 * @param amount - The amount to validate as a string
 * @param maxDecimals - Maximum number of decimal places allowed
 * @throws Error if amount is invalid
 */
export declare function validateStringAmount(amount: string, maxDecimals: number): void;
/**
 * Validates that the address is a valid Ethereum address
 * @param address - The address to validate
 * @throws Error if address is invalid
 */
export declare function validateAddress(address: string): void;
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