/**
 * Ethereum Chain Adapter
 *
 * Builds EVM transactions, attaches FROST signatures, and broadcasts
 * via ethers.js JsonRpcProvider. Works with Ethereum, Polygon, Arbitrum,
 * Optimism, Base, BSC, Avalanche — any EVM-compatible chain.
 */
import { ChainAdapter, EvmTransaction } from '../core/types';
export declare class EthereumAdapter implements ChainAdapter {
    private provider;
    private chainName;
    private chainId;
    constructor(chain?: string, rpcUrl?: string);
    getRpcUrl(): string;
    /**
     * Build an unsigned EVM transaction and serialize for signing
     *
     * @returns hex-encoded unsigned transaction hash (keccak256)
     */
    buildTransaction(tx: EvmTransaction, fromAddress: string): Promise<string>;
    /**
     * Attach a FROST-generated signature to the unsigned transaction
     *
     * @param unsignedTx - RLP-encoded unsigned transaction
     * @param signature - hex-encoded 65-byte signature (r || s || v)
     * @returns hex-encoded signed transaction ready for broadcast
     */
    attachSignature(unsignedTx: string, signature: string): Promise<string>;
    /**
     * Broadcast a signed transaction to the EVM chain
     *
     * @returns transaction hash
     */
    broadcast(signedTx: string): Promise<string>;
    /**
     * Get ETH/native token balance
     *
     * @returns balance in wei as string
     */
    getBalance(address: string): Promise<string>;
    /** Estimate gas for a transaction */
    estimateGas(tx: EvmTransaction, from: string): Promise<bigint>;
    /** Get current gas price info */
    getGasPrice(): Promise<{
        gasPrice: bigint;
        maxFeePerGas: bigint;
        maxPriorityFeePerGas: bigint;
    }>;
    /** Check if this chain uses legacy (type 0) transactions */
    isLegacyChain(): boolean;
    /** Get current block number */
    getBlockNumber(): Promise<number>;
    /** Get transaction receipt */
    getTransactionReceipt(hash: string): Promise<any>;
    /** Wait for transaction confirmation */
    waitForTransaction(hash: string, confirmations?: number): Promise<any>;
}
/** Convenience factory function */
export declare function createEthereumAdapter(rpcUrl?: string): EthereumAdapter;
export declare function createPolygonAdapter(rpcUrl?: string): EthereumAdapter;
export declare function createArbitrumAdapter(rpcUrl?: string): EthereumAdapter;
export declare function createBaseAdapter(rpcUrl?: string): EthereumAdapter;
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