/**
 * Stellar Chain Adapter
 *
 * Builds Stellar transactions using XDR serialization,
 * attaches Ed25519 signatures from the FROST threshold signing
 * network, and broadcasts via Horizon API.
 *
 * Requires: npm install @stellar/stellar-sdk
 */
import { ChainAdapter, StellarTransaction } from '../core/types';
export declare class StellarAdapter implements ChainAdapter {
    private rpcUrl;
    private network;
    private stellarSdk;
    private networkPassphrase;
    constructor(network?: 'mainnet' | 'testnet', rpcUrl?: string);
    getRpcUrl(): string;
    /**
     * Build an unsigned Stellar payment transaction.
     *
     * The signing payload is SHA-256(network_passphrase + TX envelope XDR).
     */
    buildTransaction(tx: StellarTransaction, fromAddress: string): Promise<string>;
    getSigningPayload(unsignedTx: string): string;
    /**
     * Attach an Ed25519 signature to the Stellar transaction
     */
    attachSignature(unsignedTx: string, signature: string, publicKey?: string): Promise<string>;
    /**
     * Broadcast a signed Stellar transaction
     */
    broadcast(signedTx: string): Promise<string>;
    /**
     * Get XLM balance in stroops
     */
    getBalance(address: string): Promise<string>;
}
export declare function createStellarAdapter(rpcUrl?: string): StellarAdapter;
export declare function createStellarTestnetAdapter(rpcUrl?: string): StellarAdapter;
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