import { type Base64EncodedWireTransaction, type TransactionSigner } from '@solana/kit';
import { type AmountLike, type SessionRequest, type SessionSigner } from './Session.js';
import type { SessionOpener } from './SessionFetch.js';
/** Placeholder signature used while the operator still needs to broadcast the open transaction. */
export declare const PENDING_SERVER_SIGNATURE = "1111111111111111111111111111111111111111111111111111111111111111";
/**
 * Payment-channel open fields shared by client-built and server-built open flows.
 */
export interface PaymentChannelOpen {
    readonly channelId: string;
    readonly deposit: string;
    readonly gracePeriod: number;
    readonly mint: string;
    readonly openSlot: string;
    readonly payee: string;
    readonly payer: string;
    readonly salt: string;
}
/**
 * Single payment-channel open transaction plus the fields needed to authorize a session.
 */
export interface PaymentChannelOpenTransaction extends PaymentChannelOpen {
    readonly transaction: Base64EncodedWireTransaction;
}
/**
 * Derives the payment-channel open fields without building a transaction.
 *
 * Use this for server-opened client-voucher sessions: the client must know the
 * channel PDA so it can sign vouchers, but the operator still funds and opens
 * the channel.
 */
export declare function derivePaymentChannelOpen(parameters: derivePaymentChannelOpen.Parameters): Promise<PaymentChannelOpen>;
/**
 * Builds the payer-signed payment-channel open transaction for pull/client-voucher sessions.
 *
 * The transaction uses the operator from the session challenge as fee payer and
 * is intentionally left partially signed; the server adds the operator
 * signature before broadcasting it.
 */
export declare function buildOpenPaymentChannelTransaction(parameters: buildOpenPaymentChannelTransaction.Parameters): Promise<PaymentChannelOpenTransaction>;
/**
 * Creates a high-level opener for pull-mode sessions using client-signed vouchers.
 *
 * The opener turns a session 402 challenge into a payment-channel open action
 * with the signed transaction attached. The server/operator broadcasts that
 * transaction, then subsequent stream commits are cumulative vouchers signed by
 * the generated session key.
 */
export declare function createPaymentChannelSessionOpener(parameters: createPaymentChannelSessionOpener.Parameters): SessionOpener;
/**
 * Creates an opener for pull/client-voucher sessions where the operator opens
 * the payment channel server-side.
 *
 * The payload contains the deterministic channel PDA and open fields, but no
 * transaction. The server validates those fields, opens the channel with its
 * configured signer, and then the client signs cumulative vouchers for the
 * derived channel.
 */
export declare function createServerOpenedPaymentChannelSessionOpener(parameters?: createServerOpenedPaymentChannelSessionOpener.Parameters): SessionOpener;
export declare namespace derivePaymentChannelOpen {
    interface Parameters {
        readonly authorizedSigner: string;
        readonly deposit?: AmountLike | undefined;
        readonly gracePeriod?: number | undefined;
        /** Overrides the challenge-provided `request.recentSlot` (a channel PDA seed). */
        readonly openSlot?: AmountLike | undefined;
        readonly payer: string;
        readonly programAddress?: string | undefined;
        readonly recipients?: readonly {
            readonly bps: number;
            readonly recipient: string;
        }[] | undefined;
        readonly request: SessionRequest;
        readonly salt?: AmountLike | undefined;
        readonly tokenProgram?: string | undefined;
    }
}
export declare namespace buildOpenPaymentChannelTransaction {
    interface Parameters {
        readonly authorizedSigner: string;
        readonly deposit?: AmountLike | undefined;
        readonly gracePeriod?: number | undefined;
        /** Overrides the challenge-provided `request.recentSlot` (a channel PDA seed). */
        readonly openSlot?: AmountLike | undefined;
        readonly programAddress?: string | undefined;
        readonly recipients?: readonly {
            readonly bps: number;
            readonly recipient: string;
        }[] | undefined;
        readonly request: SessionRequest;
        readonly rpcUrl?: string | undefined;
        readonly salt?: AmountLike | undefined;
        readonly signer: TransactionSigner;
        readonly tokenProgram?: string | undefined;
    }
}
export declare namespace createPaymentChannelSessionOpener {
    interface Parameters {
        readonly cumulative?: AmountLike | undefined;
        readonly deposit?: AmountLike | undefined;
        readonly expiresAt?: AmountLike | undefined;
        readonly gracePeriod?: number | undefined;
        /** Overrides the challenge-provided `request.recentSlot` (a channel PDA seed). */
        readonly openSlot?: AmountLike | undefined;
        readonly programAddress?: string | undefined;
        readonly recipients?: readonly {
            readonly bps: number;
            readonly recipient: string;
        }[] | undefined;
        readonly rpcUrl?: string | undefined;
        readonly salt?: AmountLike | undefined;
        readonly sessionSigner?: SessionSigner | undefined;
        readonly signature?: string | undefined;
        readonly signer: TransactionSigner;
        readonly source?: string | undefined;
        readonly tokenProgram?: string | undefined;
    }
}
export declare namespace createServerOpenedPaymentChannelSessionOpener {
    interface Parameters {
        readonly cumulative?: AmountLike | undefined;
        readonly deposit?: AmountLike | undefined;
        readonly expiresAt?: AmountLike | undefined;
        readonly gracePeriod?: number | undefined;
        /** Overrides the challenge-provided `request.recentSlot` (a channel PDA seed). */
        readonly openSlot?: AmountLike | undefined;
        readonly payer?: string | undefined;
        readonly programAddress?: string | undefined;
        readonly salt?: AmountLike | undefined;
        readonly sessionSigner?: SessionSigner | undefined;
        readonly signature?: string | undefined;
        readonly source?: string | undefined;
        readonly tokenProgram?: string | undefined;
    }
}
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