import type { Client } from '../../clients/createClient.js';
import type { Transport } from '../../clients/transports/createTransport.js';
import { type BaseFeeScalarErrorType, type Eip1559FeesNotSupportedErrorType } from '../../errors/fee.js';
import type { ErrorType } from '../../errors/utils.js';
import type { Block } from '../../types/block.js';
import type { Chain, GetChainParameter } from '../../types/chain.js';
import type { FeeValuesEIP1559, FeeValuesLegacy, FeeValuesType } from '../../types/fee.js';
import type { PrepareTransactionRequestParameters } from '../wallet/prepareTransactionRequest.js';
import { type EstimateMaxPriorityFeePerGasErrorType } from './estimateMaxPriorityFeePerGas.js';
import { type GetGasPriceErrorType } from './getGasPrice.js';
export type EstimateFeesPerGasParameters<chain extends Chain | undefined = Chain | undefined, chainOverride extends Chain | undefined = Chain | undefined, type extends FeeValuesType = FeeValuesType> = {
    /**
     * The type of fee values to return.
     *
     * - `legacy`: Returns the legacy gas price.
     * - `eip1559`: Returns the max fee per gas and max priority fee per gas.
     *
     * @default 'eip1559'
     */
    type?: type | FeeValuesType | undefined;
} & GetChainParameter<chain, chainOverride>;
export type EstimateFeesPerGasReturnType<type extends FeeValuesType = FeeValuesType> = (type extends 'legacy' ? FeeValuesLegacy : never) | (type extends 'eip1559' ? FeeValuesEIP1559 : never);
export type EstimateFeesPerGasErrorType = BaseFeeScalarErrorType | EstimateMaxPriorityFeePerGasErrorType | GetGasPriceErrorType | Eip1559FeesNotSupportedErrorType | ErrorType;
/**
 * Returns an estimate for the fees per gas (in wei) for a
 * transaction to be likely included in the next block.
 * Defaults to [`chain.fees.estimateFeesPerGas`](/docs/clients/chains#fees-estimatefeespergas) if set.
 *
 * - Docs: https://viem.sh/docs/actions/public/estimateFeesPerGas
 *
 * @param client - Client to use
 * @param parameters - {@link EstimateFeesPerGasParameters}
 * @returns An estimate (in wei) for the fees per gas. {@link EstimateFeesPerGasReturnType}
 *
 * @example
 * import { createPublicClient, http } from 'viem'
 * import { mainnet } from 'viem/chains'
 * import { estimateFeesPerGas } from 'viem/actions'
 *
 * const client = createPublicClient({
 *   chain: mainnet,
 *   transport: http(),
 * })
 * const maxPriorityFeePerGas = await estimateFeesPerGas(client)
 * // { maxFeePerGas: ..., maxPriorityFeePerGas: ... }
 */
export declare function estimateFeesPerGas<chain extends Chain | undefined, chainOverride extends Chain | undefined, type extends FeeValuesType = 'eip1559'>(client: Client<Transport, chain>, args?: EstimateFeesPerGasParameters<chain, chainOverride, type> | undefined): Promise<EstimateFeesPerGasReturnType<type>>;
export declare function internal_estimateFeesPerGas<chain extends Chain | undefined, chainOverride extends Chain | undefined, type extends FeeValuesType = 'eip1559'>(client: Client<Transport, chain>, args: EstimateFeesPerGasParameters<chain, chainOverride, type> & {
    block?: Block | undefined;
    request?: PrepareTransactionRequestParameters | undefined;
}): Promise<EstimateFeesPerGasReturnType<type>>;
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