/**
 * Privacy API client for B402 backend
 */
import type { ShieldCommitment, NullifierScanResponse, MerkleProofResponse } from './types';
export type { ShieldCommitment, OutputCommitment, MerkleProofResponse } from './types';
export interface CommitmentsResponse {
    shields: ShieldCommitment[];
    unshieldedAmounts?: Record<string, string>;
}
export declare function fetchCommitmentsByEOA(apiUrl: string, eoa: string, incognitoWallet?: string, chainId?: number): Promise<CommitmentsResponse>;
export declare function fetchNullifierData(apiUrl: string, nullifiers: string[], chainId?: number): Promise<NullifierScanResponse>;
export declare function fetchNullifierDataBatched(apiUrl: string, nullifiers: string[], chainId?: number): Promise<NullifierScanResponse>;
/**
 * Fetch merkle proof with retry logic
 *
 * The backend merkle tree may take 30-90 seconds to sync after a new shield.
 * This function retries with exponential backoff until the proof is available.
 */
export declare function fetchMerkleProof(apiUrl: string, commitmentHash: string, treeNumber: string, position: string, options?: {
    maxRetries?: number;
    initialDelayMs?: number;
    chainId?: number;
}): Promise<MerkleProofResponse>;
export declare function fetchMerkleProofsBatch(apiUrl: string, requests: Array<{
    commitmentHash: string;
    treeNumber: string;
    position: string;
}>, options?: {
    maxRetries?: number;
    initialDelayMs?: number;
    chainId?: number;
}): Promise<(MerkleProofResponse | null)[]>;
export declare function submitUnshieldTransaction(apiUrl: string, transaction: {
    serializedTransaction: string;
    toAddress: string;
    relayerFee: string;
}): Promise<{
    txHash: string;
}>;
export interface UnshieldQueueRequest {
    txidVersion: string;
    transactionTo: string;
    transactionData: string;
    chain: {
        type: number;
        id: number;
    };
    nullifierHash: string;
}
export interface UnshieldQueueResponse {
    exists: boolean;
    unshieldId: string;
    timeElapsedMs?: number;
    broadcasterTxHash?: string;
    createdAt?: string;
    broadcastedAt?: string;
    completedAt?: string;
}
export declare function queueUnshield(_apiUrl: string, // Ignored - using internal route for security
request: UnshieldQueueRequest): Promise<UnshieldQueueResponse>;