import { CURRENT_STEP_CONTRACT_VERSION } from '../steps/step-contract.js';
export type StepContractV3MigrationStep = Readonly<{
    id?: unknown;
    name?: unknown;
    type: unknown;
    kind?: unknown;
    metadata?: Readonly<Record<string, unknown>>;
    [key: string]: unknown;
}>;
export type StepContractV3MigrationManifest = Readonly<{
    stepContractVersion: 2 | 3;
    steps: readonly StepContractV3MigrationStep[];
    [key: string]: unknown;
}>;
type StepContractV3MigratedMetadata<T> = T extends Readonly<Record<string, unknown>> ? T extends Readonly<{
    stepType: 'complete_registration';
}> ? Omit<T, 'stepType'> & Readonly<{
    stepType: 'purchase_completed';
}> : T : T;
type StepContractV3MigratedStep<T> = T extends Readonly<{
    id: 'subscription-started';
    name: 'subscription-started';
    type: 'complete_registration';
    kind: 'subscription-handoff';
}> ? Omit<T, 'type' | 'metadata'> & Readonly<{
    type: 'purchase_completed';
}> & (T extends Readonly<{
    metadata: infer M;
}> ? Readonly<{
    metadata: StepContractV3MigratedMetadata<M>;
}> : unknown) : T;
type StepContractV3MigratedSteps<T extends readonly StepContractV3MigrationStep[]> = {
    [K in keyof T]: StepContractV3MigratedStep<T[K]>;
};
export type StepContractV3MigratedManifest<T extends StepContractV3MigrationManifest> = T extends StepContractV3MigrationManifest ? Omit<T, 'stepContractVersion' | 'steps'> & Readonly<{
    stepContractVersion: typeof CURRENT_STEP_CONTRACT_VERSION;
    steps: T['stepContractVersion'] extends 2 ? StepContractV3MigratedSteps<T['steps']> : T['steps'];
}> : never;
export declare const isStepContractV2PurchaseTerminal: (step: Pick<StepContractV3MigrationStep, "id" | "name" | "type" | "kind">) => boolean;
export declare function migrateStepContractV2ToV3<T extends StepContractV3MigrationManifest>(manifest: T): StepContractV3MigratedManifest<T>;
export {};