Documentation ¶
Index ¶
- func CfnTrail_CFN_RESOURCE_TYPE_NAME() *string
- func CfnTrail_IsCfnElement(x interface{}) *bool
- func CfnTrail_IsCfnResource(construct constructs.IConstruct) *bool
- func CfnTrail_IsConstruct(x interface{}) *bool
- func NewCfnTrail_Override(c CfnTrail, scope awscdk.Construct, id *string, props *CfnTrailProps)
- func NewTrail_Override(t Trail, scope constructs.Construct, id *string, props *TrailProps)
- func Trail_IsConstruct(x interface{}) *bool
- func Trail_IsResource(construct awscdk.IConstruct) *bool
- func Trail_OnEvent(scope constructs.Construct, id *string, options *awsevents.OnEventOptions) awsevents.Rule
- type AddEventSelectorOptions
- type CfnTrail
- type CfnTrailProps
- type CfnTrail_DataResourceProperty
- type CfnTrail_EventSelectorProperty
- type CfnTrail_InsightSelectorProperty
- type DataResourceType
- type ManagementEventSources
- type ReadWriteType
- type S3EventSelector
- type Trail
- type TrailProps
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func CfnTrail_CFN_RESOURCE_TYPE_NAME ¶
func CfnTrail_CFN_RESOURCE_TYPE_NAME() *string
func CfnTrail_IsCfnElement ¶
func CfnTrail_IsCfnElement(x interface{}) *bool
Returns `true` if a construct is a stack element (i.e. part of the synthesized cloudformation template).
Uses duck-typing instead of `instanceof` to allow stack elements from different versions of this library to be included in the same stack.
Returns: The construct as a stack element or undefined if it is not a stack element. Experimental.
func CfnTrail_IsCfnResource ¶
func CfnTrail_IsCfnResource(construct constructs.IConstruct) *bool
Check whether the given construct is a CfnResource. Experimental.
func CfnTrail_IsConstruct ¶
func CfnTrail_IsConstruct(x interface{}) *bool
Return whether the given object is a Construct. Experimental.
func NewCfnTrail_Override ¶
func NewCfnTrail_Override(c CfnTrail, scope awscdk.Construct, id *string, props *CfnTrailProps)
Create a new `AWS::CloudTrail::Trail`.
func NewTrail_Override ¶
func NewTrail_Override(t Trail, scope constructs.Construct, id *string, props *TrailProps)
Experimental.
func Trail_IsConstruct ¶
func Trail_IsConstruct(x interface{}) *bool
Return whether the given object is a Construct. Experimental.
func Trail_IsResource ¶
func Trail_IsResource(construct awscdk.IConstruct) *bool
Check whether the given construct is a Resource. Experimental.
func Trail_OnEvent ¶
func Trail_OnEvent(scope constructs.Construct, id *string, options *awsevents.OnEventOptions) awsevents.Rule
Create an event rule for when an event is recorded by any Trail in the account.
Note that the event doesn't necessarily have to come from this Trail, it can be captured from any one.
Be sure to filter the event further down using an event pattern. Experimental.
Types ¶
type AddEventSelectorOptions ¶
type AddEventSelectorOptions struct { // An optional list of service event sources from which you do not want management events to be logged on your trail. // Experimental. ExcludeManagementEventSources *[]ManagementEventSources `json:"excludeManagementEventSources"` // Specifies whether the event selector includes management events for the trail. // Experimental. IncludeManagementEvents *bool `json:"includeManagementEvents"` // Specifies whether to log read-only events, write-only events, or all events. // Experimental. ReadWriteType ReadWriteType `json:"readWriteType"` }
Options for adding an event selector.
TODO: EXAMPLE
Experimental.
type CfnTrail ¶
type CfnTrail interface { awscdk.CfnResource awscdk.IInspectable AttrArn() *string AttrSnsTopicArn() *string CfnOptions() awscdk.ICfnResourceOptions CfnProperties() *map[string]interface{} CfnResourceType() *string CloudWatchLogsLogGroupArn() *string SetCloudWatchLogsLogGroupArn(val *string) CloudWatchLogsRoleArn() *string SetCloudWatchLogsRoleArn(val *string) CreationStack() *[]*string EnableLogFileValidation() interface{} SetEnableLogFileValidation(val interface{}) EventSelectors() interface{} SetEventSelectors(val interface{}) IncludeGlobalServiceEvents() interface{} SetIncludeGlobalServiceEvents(val interface{}) InsightSelectors() interface{} SetInsightSelectors(val interface{}) IsLogging() interface{} SetIsLogging(val interface{}) IsMultiRegionTrail() interface{} SetIsMultiRegionTrail(val interface{}) IsOrganizationTrail() interface{} SetIsOrganizationTrail(val interface{}) KmsKeyId() *string SetKmsKeyId(val *string) LogicalId() *string Node() awscdk.ConstructNode Ref() *string S3BucketName() *string SetS3BucketName(val *string) S3KeyPrefix() *string SetS3KeyPrefix(val *string) SnsTopicName() *string SetSnsTopicName(val *string) Stack() awscdk.Stack Tags() awscdk.TagManager TrailName() *string SetTrailName(val *string) UpdatedProperites() *map[string]interface{} AddDeletionOverride(path *string) AddDependsOn(target awscdk.CfnResource) AddMetadata(key *string, value interface{}) AddOverride(path *string, value interface{}) AddPropertyDeletionOverride(propertyPath *string) AddPropertyOverride(propertyPath *string, value interface{}) ApplyRemovalPolicy(policy awscdk.RemovalPolicy, options *awscdk.RemovalPolicyOptions) GetAtt(attributeName *string) awscdk.Reference GetMetadata(key *string) interface{} Inspect(inspector awscdk.TreeInspector) OnPrepare() OnSynthesize(session constructs.ISynthesisSession) OnValidate() *[]*string OverrideLogicalId(newLogicalId *string) Prepare() RenderProperties(props *map[string]interface{}) *map[string]interface{} ShouldSynthesize() *bool Synthesize(session awscdk.ISynthesisSession) ToString() *string Validate() *[]*string ValidateProperties(_properties interface{}) }
A CloudFormation `AWS::CloudTrail::Trail`.
Creates a trail that specifies the settings for delivery of log data to an Amazon S3 bucket.
TODO: EXAMPLE
func NewCfnTrail ¶
func NewCfnTrail(scope awscdk.Construct, id *string, props *CfnTrailProps) CfnTrail
Create a new `AWS::CloudTrail::Trail`.
type CfnTrailProps ¶
type CfnTrailProps struct { // Whether the CloudTrail trail is currently logging AWS API calls. IsLogging interface{} `json:"isLogging"` // Specifies the name of the Amazon S3 bucket designated for publishing log files. // // See [Amazon S3 Bucket Naming Requirements](https://docs.aws.amazon.com/awscloudtrail/latest/userguide/create_trail_naming_policy.html) . S3BucketName *string `json:"s3BucketName"` // Specifies a log group name using an Amazon Resource Name (ARN), a unique identifier that represents the log group to which CloudTrail logs are delivered. // // Not required unless you specify `CloudWatchLogsRoleArn` . CloudWatchLogsLogGroupArn *string `json:"cloudWatchLogsLogGroupArn"` // Specifies the role for the CloudWatch Logs endpoint to assume to write to a user's log group. CloudWatchLogsRoleArn *string `json:"cloudWatchLogsRoleArn"` // Specifies whether log file validation is enabled. The default is false. // // > When you disable log file integrity validation, the chain of digest files is broken after one hour. CloudTrail does not create digest files for log files that were delivered during a period in which log file integrity validation was disabled. For example, if you enable log file integrity validation at noon on January 1, disable it at noon on January 2, and re-enable it at noon on January 10, digest files will not be created for the log files delivered from noon on January 2 to noon on January 10. The same applies whenever you stop CloudTrail logging or delete a trail. EnableLogFileValidation interface{} `json:"enableLogFileValidation"` // Use event selectors to further specify the management and data event settings for your trail. // // By default, trails created without specific event selectors will be configured to log all read and write management events, and no data events. When an event occurs in your account, CloudTrail evaluates the event selector for all trails. For each trail, if the event matches any event selector, the trail processes and logs the event. If the event doesn't match any event selector, the trail doesn't log the event. // // You can configure up to five event selectors for a trail. // // You cannot apply both event selectors and advanced event selectors to a trail. EventSelectors interface{} `json:"eventSelectors"` // Specifies whether the trail is publishing events from global services such as IAM to the log files. IncludeGlobalServiceEvents interface{} `json:"includeGlobalServiceEvents"` // Specifies whether a trail has insight types specified in an `InsightSelector` list. InsightSelectors interface{} `json:"insightSelectors"` // Specifies whether the trail applies only to the current region or to all regions. // // The default is false. If the trail exists only in the current region and this value is set to true, shadow trails (replications of the trail) will be created in the other regions. If the trail exists in all regions and this value is set to false, the trail will remain in the region where it was created, and its shadow trails in other regions will be deleted. As a best practice, consider using trails that log events in all regions. IsMultiRegionTrail interface{} `json:"isMultiRegionTrail"` // Specifies whether the trail is created for all accounts in an organization in AWS Organizations , or only for the current AWS account . // // The default is false, and cannot be true unless the call is made on behalf of an AWS account that is the management account for an organization in AWS Organizations . IsOrganizationTrail interface{} `json:"isOrganizationTrail"` // Specifies the AWS KMS key ID to use to encrypt the logs delivered by CloudTrail. // // The value can be an alias name prefixed by "alias/", a fully specified ARN to an alias, a fully specified ARN to a key, or a globally unique identifier. // // CloudTrail also supports AWS KMS multi-Region keys. For more information about multi-Region keys, see [Using multi-Region keys](https://docs.aws.amazon.com/kms/latest/developerguide/multi-region-keys-overview.html) in the *AWS Key Management Service Developer Guide* . // // Examples: // // - alias/MyAliasName // - arn:aws:kms:us-east-2:123456789012:alias/MyAliasName // - arn:aws:kms:us-east-2:123456789012:key/12345678-1234-1234-1234-123456789012 // - 12345678-1234-1234-1234-123456789012 KmsKeyId *string `json:"kmsKeyId"` // Specifies the Amazon S3 key prefix that comes after the name of the bucket you have designated for log file delivery. // // For more information, see [Finding Your CloudTrail Log Files](https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudtrail-find-log-files.html) . The maximum length is 200 characters. S3KeyPrefix *string `json:"s3KeyPrefix"` // Specifies the name of the Amazon SNS topic defined for notification of log file delivery. // // The maximum length is 256 characters. SnsTopicName *string `json:"snsTopicName"` // A custom set of tags (key-value pairs) for this trail. Tags *[]*awscdk.CfnTag `json:"tags"` // Specifies the name of the trail. The name must meet the following requirements:. // // - Contain only ASCII letters (a-z, A-Z), numbers (0-9), periods (.), underscores (_), or dashes (-) // - Start with a letter or number, and end with a letter or number // - Be between 3 and 128 characters // - Have no adjacent periods, underscores or dashes. Names like `my-_namespace` and `my--namespace` are not valid. // - Not be in IP address format (for example, 192.168.5.4) TrailName *string `json:"trailName"` }
Properties for defining a `CfnTrail`.
TODO: EXAMPLE
type CfnTrail_DataResourceProperty ¶
type CfnTrail_DataResourceProperty struct { // The resource type in which you want to log data events. // // You can specify the following *basic* event selector resource types: // // - `AWS::S3::Object` // - `AWS::Lambda::Function` // - `AWS::DynamoDB::Table` // // The following resource types are also availble through *advanced* event selectors. Basic event selector resource types are valid in advanced event selectors, but advanced event selector resource types are not valid in basic event selectors. For more information, see [AdvancedFieldSelector:Field](https://docs.aws.amazon.com/awscloudtrail/latest/APIReference/API_AdvancedFieldSelector.html#awscloudtrail-Type-AdvancedFieldSelector-Field) . // // - `AWS::S3Outposts::Object` // - `AWS::ManagedBlockchain::Node` // - `AWS::S3ObjectLambda::AccessPoint` // - `AWS::EC2::Snapshot` // - `AWS::S3::AccessPoint` // - `AWS::DynamoDB::Stream` Type *string `json:"type"` // An array of Amazon Resource Name (ARN) strings or partial ARN strings for the specified objects. // // - To log data events for all objects in all S3 buckets in your AWS account , specify the prefix as `arn:aws:s3:::` . // // > This also enables logging of data event activity performed by any user or role in your AWS account , even if that activity is performed on a bucket that belongs to another AWS account . // - To log data events for all objects in an S3 bucket, specify the bucket and an empty object prefix such as `arn:aws:s3:::bucket-1/` . The trail logs data events for all objects in this S3 bucket. // - To log data events for specific objects, specify the S3 bucket and object prefix such as `arn:aws:s3:::bucket-1/example-images` . The trail logs data events for objects in this S3 bucket that match the prefix. // - To log data events for all Lambda functions in your AWS account , specify the prefix as `arn:aws:lambda` . // // > This also enables logging of `Invoke` activity performed by any user or role in your AWS account , even if that activity is performed on a function that belongs to another AWS account . // - To log data events for a specific Lambda function, specify the function ARN. // // > Lambda function ARNs are exact. For example, if you specify a function ARN *arn:aws:lambda:us-west-2:111111111111:function:helloworld* , data events will only be logged for *arn:aws:lambda:us-west-2:111111111111:function:helloworld* . They will not be logged for *arn:aws:lambda:us-west-2:111111111111:function:helloworld2* . // - To log data events for all DynamoDB tables in your AWS account , specify the prefix as `arn:aws:dynamodb` . Values *[]*string `json:"values"` }
The Amazon S3 buckets, AWS Lambda functions, or Amazon DynamoDB tables that you specify in your event selectors for your trail to log data events.
Data events provide information about the resource operations performed on or within a resource itself. These are also known as data plane operations. You can specify up to 250 data resources for a trail.
> The total number of allowed data resources is 250. This number can be distributed between 1 and 5 event selectors, but the total cannot exceed 250 across all selectors. > > If you are using advanced event selectors, the maximum total number of values for all conditions, across all advanced event selectors for the trail, is 500.
The following example demonstrates how logging works when you configure logging of all data events for an S3 bucket named `bucket-1` . In this example, the CloudTrail user specified an empty prefix, and the option to log both `Read` and `Write` data events.
- A user uploads an image file to `bucket-1` . - The `PutObject` API operation is an Amazon S3 object-level API. It is recorded as a data event in CloudTrail. Because the CloudTrail user specified an S3 bucket with an empty prefix, events that occur on any object in that bucket are logged. The trail processes and logs the event. - A user uploads an object to an Amazon S3 bucket named `arn:aws:s3:::bucket-2` . - The `PutObject` API operation occurred for an object in an S3 bucket that the CloudTrail user didn't specify for the trail. The trail doesn’t log the event.
The following example demonstrates how logging works when you configure logging of AWS Lambda data events for a Lambda function named *MyLambdaFunction* , but not for all Lambda functions.
- A user runs a script that includes a call to the *MyLambdaFunction* function and the *MyOtherLambdaFunction* function. - The `Invoke` API operation on *MyLambdaFunction* is an Lambda API. It is recorded as a data event in CloudTrail. Because the CloudTrail user specified logging data events for *MyLambdaFunction* , any invocations of that function are logged. The trail processes and logs the event. - The `Invoke` API operation on *MyOtherLambdaFunction* is an Lambda API. Because the CloudTrail user did not specify logging data events for all Lambda functions, the `Invoke` operation for *MyOtherLambdaFunction* does not match the function specified for the trail. The trail doesn’t log the event.
TODO: EXAMPLE
type CfnTrail_EventSelectorProperty ¶
type CfnTrail_EventSelectorProperty struct { // CloudTrail supports data event logging for Amazon S3 objects and AWS Lambda functions. // // You can specify up to 250 resources for an individual event selector, but the total number of data resources cannot exceed 250 across all event selectors in a trail. This limit does not apply if you configure resource logging for all data events. // // For more information, see [Data Events](https://docs.aws.amazon.com/awscloudtrail/latest/userguide/logging-management-and-data-events-with-cloudtrail.html#logging-data-events) and [Limits in AWS CloudTrail](https://docs.aws.amazon.com/awscloudtrail/latest/userguide/WhatIsCloudTrail-Limits.html) in the *AWS CloudTrail User Guide* . DataResources interface{} `json:"dataResources"` // An optional list of service event sources from which you do not want management events to be logged on your trail. // // In this release, the list can be empty (disables the filter), or it can filter out AWS Key Management Service or Amazon RDS Data API events by containing `kms.amazonaws.com` or `rdsdata.amazonaws.com` . By default, `ExcludeManagementEventSources` is empty, and AWS KMS and Amazon RDS Data API events are logged to your trail. You can exclude management event sources only in regions that support the event source. ExcludeManagementEventSources *[]*string `json:"excludeManagementEventSources"` // Specify if you want your event selector to include management events for your trail. // // For more information, see [Management Events](https://docs.aws.amazon.com/awscloudtrail/latest/userguide/logging-management-and-data-events-with-cloudtrail.html#logging-management-events) in the *AWS CloudTrail User Guide* . // // By default, the value is `true` . // // The first copy of management events is free. You are charged for additional copies of management events that you are logging on any subsequent trail in the same region. For more information about CloudTrail pricing, see [AWS CloudTrail Pricing](https://docs.aws.amazon.com/cloudtrail/pricing/) . IncludeManagementEvents interface{} `json:"includeManagementEvents"` // Specify if you want your trail to log read-only events, write-only events, or all. // // For example, the EC2 `GetConsoleOutput` is a read-only API operation and `RunInstances` is a write-only API operation. // // By default, the value is `All` . ReadWriteType *string `json:"readWriteType"` }
Use event selectors to further specify the management and data event settings for your trail.
By default, trails created without specific event selectors will be configured to log all read and write management events, and no data events. When an event occurs in your account, CloudTrail evaluates the event selector for all trails. For each trail, if the event matches any event selector, the trail processes and logs the event. If the event doesn't match any event selector, the trail doesn't log the event.
You can configure up to five event selectors for a trail.
You cannot apply both event selectors and advanced event selectors to a trail.
TODO: EXAMPLE
type CfnTrail_InsightSelectorProperty ¶
type CfnTrail_InsightSelectorProperty struct { // The type of insights to log on a trail. // // `ApiCallRateInsight` and `ApiErrorRateInsight` are valid insight types. InsightType *string `json:"insightType"` }
A JSON string that contains a list of insight types that are logged on a trail.
TODO: EXAMPLE
type DataResourceType ¶
type DataResourceType string
Resource type for a data event. Experimental.
const ( DataResourceType_LAMBDA_FUNCTION DataResourceType = "LAMBDA_FUNCTION" DataResourceType_S3_OBJECT DataResourceType = "S3_OBJECT" )
type ManagementEventSources ¶
type ManagementEventSources string
Types of management event sources that can be excluded. Experimental.
const ( ManagementEventSources_KMS ManagementEventSources = "KMS" ManagementEventSources_RDS_DATA_API ManagementEventSources = "RDS_DATA_API" )
type ReadWriteType ¶
type ReadWriteType string
Types of events that CloudTrail can log.
TODO: EXAMPLE
Experimental.
const ( ReadWriteType_READ_ONLY ReadWriteType = "READ_ONLY" ReadWriteType_WRITE_ONLY ReadWriteType = "WRITE_ONLY" ReadWriteType_ALL ReadWriteType = "ALL" ReadWriteType_NONE ReadWriteType = "NONE" )
type S3EventSelector ¶
type S3EventSelector struct { // S3 bucket. // Experimental. Bucket awss3.IBucket `json:"bucket"` // Data events for objects whose key matches this prefix will be logged. // Experimental. ObjectPrefix *string `json:"objectPrefix"` }
Selecting an S3 bucket and an optional prefix to be logged for data events.
TODO: EXAMPLE
Experimental.
type Trail ¶
type Trail interface { awscdk.Resource Env() *awscdk.ResourceEnvironment LogGroup() awslogs.ILogGroup Node() awscdk.ConstructNode PhysicalName() *string Stack() awscdk.Stack TrailArn() *string TrailSnsTopicArn() *string AddEventSelector(dataResourceType DataResourceType, dataResourceValues *[]*string, options *AddEventSelectorOptions) AddLambdaEventSelector(handlers *[]awslambda.IFunction, options *AddEventSelectorOptions) AddS3EventSelector(s3Selector *[]*S3EventSelector, options *AddEventSelectorOptions) ApplyRemovalPolicy(policy awscdk.RemovalPolicy) GeneratePhysicalName() *string GetResourceArnAttribute(arnAttr *string, arnComponents *awscdk.ArnComponents) *string GetResourceNameAttribute(nameAttr *string) *string LogAllLambdaDataEvents(options *AddEventSelectorOptions) LogAllS3DataEvents(options *AddEventSelectorOptions) OnCloudTrailEvent(id *string, options *awsevents.OnEventOptions) awsevents.Rule OnPrepare() OnSynthesize(session constructs.ISynthesisSession) OnValidate() *[]*string Prepare() Synthesize(session awscdk.ISynthesisSession) ToString() *string Validate() *[]*string }
Cloud trail allows you to log events that happen in your AWS account For example:.
import { CloudTrail } from '@aws-cdk/aws-cloudtrail'
const cloudTrail = new CloudTrail(this, 'MyTrail');
NOTE the above example creates an UNENCRYPTED bucket by default, If you are required to use an Encrypted bucket you can supply a preconfigured bucket via TrailProps
TODO: EXAMPLE
Experimental.
func NewTrail ¶
func NewTrail(scope constructs.Construct, id *string, props *TrailProps) Trail
Experimental.
type TrailProps ¶
type TrailProps struct { // The Amazon S3 bucket. // Experimental. Bucket awss3.IBucket `json:"bucket"` // Log Group to which CloudTrail to push logs to. // // Ignored if sendToCloudWatchLogs is set to false. // Experimental. CloudWatchLogGroup awslogs.ILogGroup `json:"cloudWatchLogGroup"` // How long to retain logs in CloudWatchLogs. // // Ignored if sendToCloudWatchLogs is false or if cloudWatchLogGroup is set. // Experimental. CloudWatchLogsRetention awslogs.RetentionDays `json:"cloudWatchLogsRetention"` // To determine whether a log file was modified, deleted, or unchanged after CloudTrail delivered it, you can use CloudTrail log file integrity validation. // // This feature is built using industry standard algorithms: SHA-256 for hashing and SHA-256 with RSA for digital signing. // This makes it computationally infeasible to modify, delete or forge CloudTrail log files without detection. // You can use the AWS CLI to validate the files in the location where CloudTrail delivered them. // Experimental. EnableFileValidation *bool `json:"enableFileValidation"` // The AWS Key Management Service (AWS KMS) key ID that you want to use to encrypt CloudTrail logs. // Experimental. EncryptionKey awskms.IKey `json:"encryptionKey"` // For most services, events are recorded in the region where the action occurred. // // For global services such as AWS Identity and Access Management (IAM), AWS STS, Amazon CloudFront, and Route 53, // events are delivered to any trail that includes global services, and are logged as occurring in US East (N. Virginia) Region. // Experimental. IncludeGlobalServiceEvents *bool `json:"includeGlobalServiceEvents"` // Whether or not this trail delivers log files from multiple regions to a single S3 bucket for a single account. // Experimental. IsMultiRegionTrail *bool `json:"isMultiRegionTrail"` // The AWS Key Management Service (AWS KMS) key ID that you want to use to encrypt CloudTrail logs. // Deprecated: - use encryptionKey instead. KmsKey awskms.IKey `json:"kmsKey"` // When an event occurs in your account, CloudTrail evaluates whether the event matches the settings for your trails. // // Only events that match your trail settings are delivered to your Amazon S3 bucket and Amazon CloudWatch Logs log group. // // This method sets the management configuration for this trail. // // Management events provide insight into management operations that are performed on resources in your AWS account. // These are also known as control plane operations. // Management events can also include non-API events that occur in your account. // For example, when a user logs in to your account, CloudTrail logs the ConsoleLogin event. // Experimental. ManagementEvents ReadWriteType `json:"managementEvents"` // An Amazon S3 object key prefix that precedes the name of all log files. // Experimental. S3KeyPrefix *string `json:"s3KeyPrefix"` // If CloudTrail pushes logs to CloudWatch Logs in addition to S3. // // Disabled for cost out of the box. // Experimental. SendToCloudWatchLogs *bool `json:"sendToCloudWatchLogs"` // SNS topic that is notified when new log files are published. // Experimental. SnsTopic awssns.ITopic `json:"snsTopic"` // The name of the trail. // // We recommend customers do not set an explicit name. // Experimental. TrailName *string `json:"trailName"` }
Properties for an AWS CloudTrail trail.
TODO: EXAMPLE
Experimental.