import { ethers } from 'ethers';
/**
 * Create a signature for spending tokens on behalf of an organization
 * @param signer Signer to sign the message
 * @param organization Organization address
 * @param recipient Recipient address
 * @param amount Amount to spend
 * @param reason Reason for spending
 * @returns Signature that can be used with spendWithSignature
 */
export declare function createSpendSignature(signer: ethers.Signer, organization: string, recipient: string, amount: bigint, reason: string): Promise<string>;
/**
 * Create a signature for point redemption
 * @param signer Signer to sign the message
 * @param user User address
 * @param points Number of points
 * @param collectibleType Type of collectible
 * @returns Signature that can be used with redeemPoints
 */
export declare function createPointRedemptionSignature(signer: ethers.Signer, user: string, points: number, collectibleType: number): Promise<string>;
/**
 * Verify a signature for spending tokens
 * @param signature Signature to verify
 * @param organization Organization address
 * @param recipient Recipient address
 * @param amount Amount to spend
 * @param reason Reason for spending
 * @returns Address of the signer
 */
export declare function verifySpendSignature(signature: string, organization: string, recipient: string, amount: bigint, reason: string): string;
/**
 * Verify a signature for point redemption
 * @param signature Signature to verify
 * @param user User address
 * @param points Number of points
 * @param collectibleType Type of collectible
 * @returns Address of the signer
 */
export declare function verifyPointRedemptionSignature(signature: string, user: string, points: number, collectibleType: number): string;