/**
 * Solana Chain Adapter
 *
 * Builds Solana transactions, attaches Ed25519 signatures generated
 * by the FROST threshold signing network, and broadcasts via
 * @solana/web3.js Connection.
 */
import { ChainAdapter, SolTransaction } from '../core/types';
export declare class SolanaAdapter implements ChainAdapter {
    private connection;
    private rpcUrl;
    /** Optional: Solana address to receive Sequence0 service fee (30% of compute cost) */
    private feeAddress?;
    constructor(network?: 'mainnet' | 'devnet', rpcUrl?: string, feeAddress?: string);
    getRpcUrl(): string;
    /**
     * Build an unsigned Solana transaction
     *
     * Creates a SOL transfer instruction, fetches recent blockhash,
     * and serializes the message for Ed25519 signing via FROST.
     *
     * @returns base64-encoded unsigned transaction message
     */
    buildTransaction(tx: SolTransaction, fromAddress: string): Promise<string>;
    /**
     * Extract the signing payload (message bytes) from the unsigned transaction
     */
    getSigningPayload(unsignedTx: string): string;
    /**
     * Attach an Ed25519 signature from FROST to the Solana transaction
     */
    attachSignature(unsignedTx: string, signature: string): Promise<string>;
    /**
     * Broadcast a signed Solana transaction
     *
     * @returns transaction signature (hash)
     */
    broadcast(signedTx: string): Promise<string>;
    /**
     * Get SOL balance in lamports
     */
    getBalance(address: string): Promise<string>;
    /** Get SOL balance in SOL (human-readable) */
    getBalanceSol(address: string): Promise<number>;
    /** Get recent block height */
    getSlot(): Promise<number>;
    /** Get transaction details */
    getTransaction(signature: string): Promise<any>;
    /** Confirm transaction */
    confirmTransaction(signature: string): Promise<any>;
}
export declare function createSolanaAdapter(rpcUrl?: string): SolanaAdapter;
export declare function createSolanaDevnetAdapter(rpcUrl?: string): SolanaAdapter;
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