import { type DataPortabilityGatewayConfig } from "./eip712.js";
export interface VerifyGrantRegistrationInput {
    gatewayConfig: DataPortabilityGatewayConfig;
    grantorAddress: `0x${string}`;
    granteeId: `0x${string}`;
    scopes: string[];
    grantVersion: bigint | number | string;
    expiresAt: bigint | number | string;
    signature: `0x${string}`;
    nowSeconds?: number;
}
export type VerifyGrantRegistrationResult = {
    valid: true;
    grantorAddress: `0x${string}`;
    granteeId: `0x${string}`;
    scopes: string[];
    grantVersion: string;
    expiresAt: string;
} | {
    valid: false;
    error: string;
};
export declare function isDataPortabilityGatewayConfig(value: unknown): value is DataPortabilityGatewayConfig;
export declare function verifyGrantRegistration(input: VerifyGrantRegistrationInput): Promise<VerifyGrantRegistrationResult>;