import type { LoginProof, VerifyLoginProofContext, VerifyLoginProofResult } from './types.js';
/**
 * Verify login proof: crypto, allowed pubkeys, timestamp window, nonce anti-replay.
 * Service must provide allowedPubkeys (from validators) and a NonceCache.
 *
 * @param proof - Login proof from UserWallet
 * @param ctx - Verification context (allowedPubkeys, nonceCache, timestampWindowMs)
 * @returns Verification result with accept flag and optional reason
 * @throws {Error} If proof structure is invalid (missing challenge, hash, signatures)
 */
export declare function verifyLoginProof(proof: LoginProof, ctx: VerifyLoginProofContext): VerifyLoginProofResult;
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