/**
 * Named-wallet profile storage.
 *
 * A "wallet" is a whole config directory. The reserved `default` wallet lives
 * at the base config dir (zero migration for existing installs); every named
 * wallet lives under `{base}/profiles/<name>/` with its own `allowance.json`,
 * `projects.json`, and this module's non-secret `meta.json`.
 *
 * Two levels of active state, mirroring the wallet → project model:
 *   - base `{base}/config.json` `active_wallet`  — which wallet is the default
 *   - per-wallet `projects.json` `active_project_id` — which project within it
 *
 * All writes are atomic (temp-file + rename) and owner-only (0600 files,
 * 0700 dirs). `meta.json` holds only public/display data (no private key), so
 * listing and name display never need to load key material.
 */
export interface BaseConfig {
    active_wallet?: string;
}
export interface ProfileMeta {
    name: string;
    address?: string;
    /** Cached server-side display label; null when unknown/unset. */
    label?: string | null;
    rail?: "x402" | "mpp";
    created?: string;
}
export declare function readBaseConfig(): BaseConfig;
export declare function writeBaseConfig(cfg: BaseConfig): void;
/**
 * The globally-selected default wallet (set via `wallets use`), or the
 * reserved `default` when unset/invalid. This is precedence rung 4 — below the
 * flag, env var, and per-directory binding.
 */
export declare function getDefaultWallet(): string;
export declare function setDefaultWallet(name: string): void;
/** Absolute directory for a wallet. `default` → base dir; named → profiles/<name>. */
export declare function profileDir(name: string): string;
/** Create (if needed) a wallet's directory with owner-only (0700) perms. */
export declare function ensureProfileDir(name: string): string;
export declare function readMeta(name: string): ProfileMeta | null;
export declare function writeMeta(name: string, meta: ProfileMeta): void;
/** True when a wallet's `allowance.json` exists on disk. */
export declare function profileExists(name: string): boolean;
/**
 * All wallet names on disk: `default` (only if a root allowance.json exists)
 * plus every valid directory under `profiles/`.
 */
export declare function listProfileNames(): string[];
/** Delete a named wallet's directory. Refuses to remove the reserved default. */
export declare function removeProfile(name: string): void;
/**
 * Move a wallet to a new name. Renaming `default` migrates the root-level
 * credential files into `profiles/<newName>/` (so a named wallet is always a
 * directory). Does NOT update the `active_wallet` pointer — the caller owns
 * that orchestration. Throws if the destination already exists or the source
 * is missing.
 */
export declare function renameProfile(oldName: string, newName: string): void;
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