/**
 * Local per-user credential store with in-memory storage (TC-NearZK fallback).
 *
 * This is the local/stdio fallback. Cloudflare HTTP deployments select the
 * durable `PerSubCredStore` from `cred-store.ts`; this implementation remains
 * process-local and restart clears all credentials.
 *
 * Trust model: server admin (n24q02m operator) can dump live memory via
 * debugger but no persistent file = no FS-dump compromise + no admin
 * recovery from disk.
 */
export interface CredentialPayload {
    [key: string]: unknown;
}
/**
 * Common interface satisfied by both the in-memory store (stdio / local
 * single-process) and the KV write-through `PerSubCredStore` (Cloudflare
 * deploy), so the HTTP transport can select either without branching on the
 * concrete type. `ready` is optional (KV-only startup probe).
 */
export interface CredStoreLike {
    save(sub: string, creds: CredentialPayload): Promise<void>;
    load(sub: string): Promise<CredentialPayload | null>;
    clear(sub: string): Promise<void>;
    listSubs(): Promise<string[]>;
    ready?(): Promise<void>;
}
export declare class InMemoryCredStore implements CredStoreLike {
    private store;
    save(sub: string, creds: CredentialPayload): Promise<void>;
    load(sub: string): Promise<CredentialPayload | null>;
    clear(sub: string): Promise<void>;
    listSubs(): Promise<string[]>;
}
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