import type { TestClient, TestClientMode } from '../../clients/createTestClient.js';
import type { Transport } from '../../clients/transports/createTransport.js';
import type { ErrorType } from '../../errors/utils.js';
import type { Account } from '../../types/account.js';
import type { Chain } from '../../types/chain.js';
import type { RequestErrorType } from '../../utils/buildRequest.js';
export type SetNextBlockBaseFeePerGasParameters = {
    /** Base fee per gas (in wei). */
    baseFeePerGas: bigint;
};
export type SetNextBlockBaseFeePerGasErrorType = RequestErrorType | ErrorType;
/**
 * Sets the next block's base fee per gas.
 *
 * - Docs: https://viem.sh/docs/actions/test/setNextBlockBaseFeePerGas
 *
 * @param client - Client to use
 * @param parameters – {@link SetNextBlockBaseFeePerGasParameters}
 *
 * @example
 * import { createTestClient, http, parseGwei } from 'viem'
 * import { foundry } from 'viem/chains'
 * import { setNextBlockBaseFeePerGas } from 'viem/test'
 *
 * const client = createTestClient({
 *   mode: 'anvil',
 *   chain: 'foundry',
 *   transport: http(),
 * })
 * await setNextBlockBaseFeePerGas(client, {
 *   baseFeePerGas: parseGwei('20'),
 * })
 */
export declare function setNextBlockBaseFeePerGas<chain extends Chain | undefined, account extends Account | undefined>(client: TestClient<TestClientMode, Transport, chain, account, false>, { baseFeePerGas }: SetNextBlockBaseFeePerGasParameters): Promise<void>;
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