/**
 * Cosmos/IBC Chain Adapter
 *
 * Builds Cosmos SDK transactions, attaches secp256k1 ECDSA signatures
 * from the FROST threshold signing network, and broadcasts via
 * Tendermint RPC. Supports any IBC-compatible chain (Cosmos Hub,
 * Osmosis, Celestia, Injective, dYdX, etc.).
 *
 * Requires: npm install @cosmjs/stargate @cosmjs/proto-signing
 */
import { ChainAdapter, CosmosTransaction } from '../core/types';
export declare class CosmosAdapter implements ChainAdapter {
    private rpcUrl;
    private chainName;
    private cosmjs;
    private protoSigning;
    constructor(chainName?: string, rpcUrl?: string);
    getRpcUrl(): string;
    /**
     * Build an unsigned Cosmos transaction.
     *
     * Returns hex-encoded JSON containing the signing bytes and TX metadata.
     * The signing payload is SHA-256 of the Protobuf-serialized SignDoc.
     */
    buildTransaction(tx: CosmosTransaction, fromAddress: string): Promise<string>;
    getSigningPayload(unsignedTx: string): string;
    /**
     * Attach a secp256k1 ECDSA signature to the Cosmos transaction
     */
    attachSignature(unsignedTx: string, signature: string): Promise<string>;
    /**
     * Broadcast a signed Cosmos transaction
     */
    broadcast(signedTx: string): Promise<string>;
    /**
     * Build the AuthInfo protobuf bytes manually.
     *
     * AuthInfo structure:
     *   message AuthInfo {
     *     repeated SignerInfo signer_infos = 1;
     *     Fee fee = 2;
     *   }
     *   message SignerInfo {
     *     google.protobuf.Any public_key = 1;
     *     ModeInfo mode_info = 2;
     *     uint64 sequence = 3;
     *   }
     *   message Fee {
     *     repeated Coin amount = 1;
     *     uint64 gas_limit = 2;
     *   }
     *
     * We encode this manually using protobuf wire format to avoid
     * importing heavy cosmos-proto dependencies.
     */
    private buildAuthInfoBytes;
    /**
     * Get native token balance
     */
    getBalance(address: string): Promise<string>;
}
export declare function createCosmosAdapter(rpcUrl?: string): CosmosAdapter;
export declare function createOsmosisAdapter(rpcUrl?: string): CosmosAdapter;
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