/** Fee data returned by {@link EvmRpcExplorer.getFeeData}. */
export interface RpcFeeData {
    /** Whether the chain supports EIP-1559 (type-2 transactions). */
    supportsEip1559: boolean;
    /** Max fee per gas in wei (EIP-1559). `undefined` when the chain is legacy-only. */
    maxFeePerGas?: bigint;
    /** Max priority fee per gas in wei (EIP-1559). `undefined` when the chain is legacy-only. */
    maxPriorityFeePerGas?: bigint;
    /** Gas price in wei (legacy). Always present as a fallback. */
    gasPrice: bigint;
}
/** Minimal transaction receipt returned by {@link EvmRpcExplorer.getTransactionReceipt}. */
export interface RpcTransactionReceipt {
    /** Block number the transaction was included in. */
    blockNumber: number;
    /** `1` for success, `0` for revert. */
    status: number;
}
/**
 * Lightweight EVM explorer that communicates directly with a JSON-RPC 2.0
 * endpoint. No dependency on the ChainGate API.
 *
 * Only exposes the subset of RPC methods needed by {@link EvmRpcConnector} and
 * {@link EvmRpcTransaction}.
 */
export declare class EvmRpcExplorer {
    /** JSON-RPC endpoint URL. */
    readonly rpcUrl: string;
    /** EVM chain ID. */
    readonly chainId: number;
    private nextId;
    constructor(rpcUrl: string, chainId: number);
    /**
     * Returns the wei balance for an address (`eth_getBalance` at `"latest"`).
     */
    getBalance(address: string): Promise<bigint>;
    /**
     * Returns the nonce / transaction count for an address
     * (`eth_getTransactionCount` at `"latest"`).
     */
    getTransactionCount(address: string): Promise<bigint>;
    /**
     * Estimates gas for a transaction (`eth_estimateGas`).
     */
    estimateGas(params: {
        from: string;
        to: string;
        value: bigint;
        data?: string;
    }): Promise<bigint>;
    /**
     * Returns fee data for the current block.
     *
     * Tries EIP-1559 (`eth_maxPriorityFeePerGas` + `baseFeePerGas` from the
     * latest block). If the chain does not support EIP-1559, falls back to
     * `eth_gasPrice`.
     */
    getFeeData(): Promise<RpcFeeData>;
    /**
     * Broadcasts a signed raw transaction (`eth_sendRawTransaction`).
     *
     * @returns The transaction hash.
     */
    sendRawTransaction(signedTxHex: string): Promise<string>;
    /**
     * Returns the transaction receipt, or `null` if the transaction is still
     * pending (`eth_getTransactionReceipt`).
     */
    getTransactionReceipt(txHash: string): Promise<RpcTransactionReceipt | null>;
    /**
     * Returns the number of decimals for an ERC-20 token contract.
     */
    getTokenDecimals(contractAddress: string): Promise<number>;
    /** Returns the current gas price via `eth_gasPrice`. */
    private getGasPrice;
    /**
     * Sends a JSON-RPC 2.0 request to the configured endpoint.
     *
     * @throws {RpcError} if the response contains an `error` field or the HTTP
     * request fails.
     */
    private call;
}