import { type Readable } from "svelte/store";
import { type StateDeclaration, type StateUpdate, type StateValue } from "../types/state";
export declare class PaywallStateStore {
    #private;
    readonly subscribe: Readable<number>["subscribe"];
    constructor(declarations?: Record<string, StateDeclaration>);
    /**
     * Additive, non-overwriting registration.
     * Used by workflow screens to incrementally contribute their declarations to the shared store.
     */
    registerDeclarations(declarations: Record<string, StateDeclaration>): void;
    /** Replaces all declarations and values. Used when the workflow prop is swapped. */
    reset(declarations: Record<string, StateDeclaration>): void;
    /**
     * Apply a list of state updates, writing each resolved value to the target key.
     * Undeclared keys and type mismatches are ignored (iOS parity).
     */
    applyUpdates(updates: StateUpdate[], payload?: StateValue): void;
    /** Snapshot of current state values (defaults overlaid with applied updates). */
    get values(): Record<string, StateValue>;
    /** Snapshot of declared default values. */
    get defaults(): Record<string, StateValue>;
    /** Returns true if the given value is compatible with the declared type of the key. */
    matchesDeclaredType(value: StateValue, key: string): boolean;
}
export declare function setPaywallStateContext(store: PaywallStateStore): void;
export declare function getPaywallStateContext(): PaywallStateStore | undefined;
/** Returns the state store as a Readable, or a static no-op readable when no store is in context. */
export declare function getStateSignal(): Readable<number>;