import iam = require('@aws-cdk/aws-iam');
import cdk = require('@aws-cdk/cdk');
import { Code } from './code';
import { FunctionName, FunctionRef } from './lambda-ref';
import { FunctionVersion } from './lambda-version';
import { FunctionArn } from './lambda.generated';
import { Runtime } from './runtime';
export interface FunctionProps {
    /**
     * The source code of your Lambda function. You can point to a file in an
     * Amazon Simple Storage Service (Amazon S3) bucket or specify your source
     * code as inline text.
     */
    code: Code;
    /**
     * A description of the function.
     */
    description?: string;
    /**
     * The name of the function (within your source code) that Lambda calls to
     * start running your code. For more information, see the Handler property
     * in the AWS Lambda Developer Guide.
     *
     * NOTE: If you specify your source code as inline text by specifying the
     * ZipFile property within the Code property, specify index.function_name as
     * the handler.
     */
    handler: string;
    /**
     * The function execution time (in seconds) after which Lambda terminates
     * the function. Because the execution time affects cost, set this value
     * based on the function's expected execution time.
     *
     * @default 3 seconds.
     */
    timeout?: number;
    /**
     * Key-value pairs that Lambda caches and makes available for your Lambda
     * functions. Use environment variables to apply configuration changes, such
     * as test and production environment configurations, without changing your
     * Lambda function source code.
     */
    environment?: {
        [key: string]: any;
    };
    /**
     * The runtime environment for the Lambda function that you are uploading.
     * For valid values, see the Runtime property in the AWS Lambda Developer
     * Guide.
     */
    runtime: Runtime;
    /**
     * A name for the function. If you don't specify a name, AWS CloudFormation
     * generates a unique physical ID and uses that ID for the function's name.
     * For more information, see Name Type.
     */
    functionName?: string;
    /**
     * The amount of memory, in MB, that is allocated to your Lambda function.
     * Lambda uses this value to proportionally allocate the amount of CPU
     * power. For more information, see Resource Model in the AWS Lambda
     * Developer Guide.
     *
     * @default The default value is 128 MB
     */
    memorySize?: number;
    /**
     * Initial policy statements to add to the created Lambda Role.
     *
     * You can call `addToRolePolicy` to the created lambda to add statements post creation.
     */
    initialPolicy?: cdk.PolicyStatement[];
    /**
     * Lambda execution role.
     *
     * This is the role that will be assumed by the function upon execution.
     * It controls the permissions that the function will have. The Role must
     * be assumable by the 'lambda.amazonaws.com' service principal.
     *
     * @default a unique role will be generated for this lambda function.
     * Both supplied and generated roles can always be changed by calling `addToRolePolicy`.
     */
    role?: iam.Role;
}
/**
 * Deploys a file from from inside the construct library as a function.
 *
 * The supplied file is subject to the 4096 bytes limit of being embedded in a
 * CloudFormation template.
 *
 * The construct includes an associated role with the lambda.
 *
 * This construct does not yet reproduce all features from the underlying resource
 * library.
 */
export declare class Function extends FunctionRef {
    /**
     * Name of this function
     */
    readonly functionName: FunctionName;
    /**
     * ARN of this function
     */
    readonly functionArn: FunctionArn;
    /**
     * Execution role associated with this function
     */
    readonly role?: iam.Role;
    /**
     * The runtime configured for this lambda.
     */
    readonly runtime: Runtime;
    /**
     * The name of the handler configured for this lambda.
     */
    readonly handler: string;
    protected readonly canCreatePermissions: boolean;
    /**
     * Environment variables for this function
     */
    private readonly environment?;
    constructor(parent: cdk.Construct, name: string, props: FunctionProps);
    /**
     * Adds an environment variable to this Lambda function.
     * If this is a ref to a Lambda function, this operation results in a no-op.
     * @param key The environment variable key.
     * @param value The environment variable's value.
     */
    addEnvironment(key: string, value: any): void;
    /**
     * Add a new version for this Lambda
     *
     * If you want to deploy through CloudFormation and use aliases, you need to
     * add a new version (with a new name) to your Lambda every time you want
     * to deploy an update. An alias can then refer to the newly created Version.
     *
     * All versions should have distinct names, and you should not delete versions
     * as long as your Alias needs to refer to them.
     *
     * @param name A unique name for this version
     * @param codeSha256 The SHA-256 hash of the most recently deployed Lambda source code, or
     *    omit to skip validation.
     * @param description A description for this version.
     * @returns A new Version object.
     */
    addVersion(name: string, codeSha256?: string, description?: string): FunctionVersion;
    private renderEnvironment;
}