import type { ChainNamespace } from "./types";
export declare function normalizeMnemonic(mnemonic: string): string;
export declare function assertValidMnemonic(mnemonic: string): void;
export declare function assertDerivationIndex(index: number): void;
export declare function byokWalletId<N extends ChainNamespace>(namespace: N, index: number): `byok:${N}:${number}`;
/**
 * Legacy wire id prefix (pre-BYOK rename). Still recognized when hydrating
 * persisted wallet rosters so existing `wallets.json` continues to load.
 */
export declare function legacyLocalWalletId<N extends ChainNamespace>(namespace: N, index: number): `local:${N}:${number}`;