import type { X402SchemePreference } from '../types.js';
export declare const X402_VERSION = 2;
export declare const DEFAULT_PAYMENT_EXPIRY_SECONDS = 3600;
export interface PaymentRequiredAccept {
    scheme: string;
    network: string;
    amount: string;
    asset: string;
    payTo: string;
    maxTimeoutSeconds: number;
    extra?: {
        name?: string;
        version?: string;
        facilitatorAddress?: string;
    };
}
export interface PaymentRequiredHeader {
    x402Version: number;
    resource?: {
        url?: string;
        description?: string;
        mimeType?: string;
    };
    accepts: PaymentRequiredAccept[];
}
export type SchemePreference = X402SchemePreference;
export interface SignerWallet {
    privateKey: string;
    address: string;
}
export interface SignPaymentInput {
    wallet: SignerWallet;
    accept: PaymentRequiredAccept;
    resource?: PaymentRequiredHeader['resource'];
    amountOverride?: bigint;
    expiryOverrideSecs?: number;
    skipPermit2Approval?: boolean;
}
export interface SignPaymentResult {
    paymentSignatureBase64: string;
    from: string;
    to: string;
    amountUsd: number;
    amountAtomicUnits: bigint;
    networkLabel: string;
    expiresAt: Date;
}
export declare function selectAcceptEntry(accepts: PaymentRequiredAccept[], preference?: SchemePreference): PaymentRequiredAccept | undefined;
export declare function parsePaymentRequired(base64Value: string, schemePreference?: SchemePreference): {
    header: PaymentRequiredHeader;
    accept: PaymentRequiredAccept;
};
export declare function signPayment(input: SignPaymentInput): Promise<SignPaymentResult>;
//# sourceMappingURL=signer.d.ts.map