/**
 * Near Chain Adapter
 *
 * Builds Near Protocol transactions using Borsh serialization,
 * attaches Ed25519 signatures from the FROST threshold signing
 * network, and broadcasts via Near JSON RPC.
 *
 * Requires: npm install near-api-js
 */
import { ChainAdapter, NearTransaction } from '../core/types';
export declare class NearAdapter implements ChainAdapter {
    private rpcUrl;
    private network;
    private nearApi;
    constructor(network?: 'mainnet' | 'testnet', rpcUrl?: string);
    getRpcUrl(): string;
    /**
     * Build an unsigned Near transaction.
     *
     * Near uses Borsh serialization. The signing payload is
     * SHA-256 of the Borsh-serialized Transaction object.
     */
    buildTransaction(tx: NearTransaction, fromAddress: string): Promise<string>;
    getSigningPayload(unsignedTx: string): string;
    /**
     * Attach an Ed25519 signature to the Near transaction
     */
    attachSignature(unsignedTx: string, signature: string): Promise<string>;
    /**
     * Broadcast a signed Near transaction.
     *
     * Reconstructs a proper SignedTransaction using near-api-js
     * Borsh serialization rather than manual byte concatenation.
     */
    broadcast(signedTx: string): Promise<string>;
    /**
     * Get NEAR balance in yoctoNEAR
     */
    getBalance(address: string): Promise<string>;
}
export declare function createNearAdapter(rpcUrl?: string): NearAdapter;
export declare function createNearTestnetAdapter(rpcUrl?: string): NearAdapter;
//# sourceMappingURL=near.d.ts.map