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<!--
title: Serverless Framework - AWS Lambda Guide - Serverless.yml Reference
menuText: Serverless.yml
menuOrder: 16
description: A list of all available properties on serverless.yml for AWS
layout: Doc
-->
<!-- DOCS-SITE-LINK:START automatically generated -->
### [Read this on the main serverless docs site](https://www.serverless.com/framework/docs/providers/aws/guide/serverless.yml)
<!-- DOCS-SITE-LINK:END -->
# Serverless.yml Reference
Here is a list of all available properties in `serverless.yml` when the provider is set to `aws`.
```yml
# serverless.yml
service: myService
frameworkVersion: '2'
enableLocalInstallationFallback: false # If set to 'true', guarantees that it's a locally (for service, in its node_modules) installed framework which processes the command
useDotenv: false # If set to 'true', environment variables will be automatically loaded from .env files
disabledDeprecations: # Disable deprecation logs by their codes. Default is empty.
- DEP_CODE_1 # Deprecation code to disable
- '*' # Disable all deprecation messages
provider:
name: aws
runtime: nodejs12.x
stage: ${opt:stage, 'dev'} # Set the default stage used. Default is dev
region: ${opt:region, 'us-east-1'} # Overwrite the default region used. Default is us-east-1
stackName: custom-stack-name # Use a custom name for the CloudFormation stack
apiName: custom-api-name # Use a custom name for the API Gateway API
websocketsApiName: custom-websockets-api-name # Use a custom name for the websockets API
websocketsApiRouteSelectionExpression: $request.body.route # custom route selection expression
profile: production # The default profile to use with this service
memorySize: 512 # Overwrite the default memory size. Default is 1024
timeout: 10 # The default is 6 seconds. Note: API Gateway current maximum is 30 seconds
logRetentionInDays: 14 # Set the default RetentionInDays for a CloudWatch LogGroup
kmsKeyArn: arn:aws:kms:us-east-1:XXXXXX:key/some-hash # KMS key arn which will be used for encryption for all functions
deploymentBucket:
name: com.serverless.${self:provider.region}.deploys # Deployment bucket name. Default is generated by the framework
maxPreviousDeploymentArtifacts: 10 # On every deployment the framework prunes the bucket to remove artifacts older than this limit. The default is 5
blockPublicAccess: true # Prevents public access via ACLs or bucket policies. Default is false
serverSideEncryption: AES256 # server-side encryption method
sseKMSKeyId: arn:aws:kms:us-east-1:xxxxxxxxxxxx:key/aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa # when using server-side encryption
sseCustomerAlgorithim: AES256 # when using server-side encryption and custom keys
sseCustomerKey: string # when using server-side encryption and custom keys
sseCustomerKeyMD5: md5sum # when using server-side encryption and custom keys
tags: # Tags that will be added to each of the deployment resources
key1: value1
key2: value2
deploymentPrefix: serverless # The S3 prefix under which deployed artifacts should be stored. Default is serverless
role: arn:aws:iam::XXXXXX:role/role # Overwrite the default IAM role which is used for all functions
rolePermissionsBoundary: arn:aws:iam::XXXXXX:policy/policy # ARN of an Permissions Boundary for the role.
cfnRole: arn:aws:iam::XXXXXX:role/role # ARN of an IAM role for CloudFormation service. If specified, CloudFormation uses the role's credentials
cloudFront:
myCachePolicy1: # used as a reference in function.events[].cloudfront.cachePolicy.name
DefaultTTL: 60
MinTTL: 30
MaxTTL: 3600
Comment: my brand new cloudfront cache policy # optional
ParametersInCacheKeyAndForwardedToOrigin:
CookiesConfig:
CookieBehavior: whitelist # Possible values are 'none', 'whitelist', 'allExcept' and 'all'
Cookies:
- my-public-cookie
EnableAcceptEncodingBrotli: true # optional
EnableAcceptEncodingGzip: true
HeadersConfig:
HeadersBehavior: whitelist # Possible values are 'none' and 'whitelist'
Headers:
- authorization
- content-type
QueryStringsConfig:
QueryStringBehavior: allExcept # Possible values are 'none', 'whitelist', 'allExcept' and 'all'
QueryStrings:
- not-cached-query-string
versionFunctions: false # Optional function versioning
environment: # Service wide environment variables
serviceEnvVar: 123456789
endpointType: regional # Optional endpoint configuration for API Gateway REST API. Default is Edge.
apiKeys: # List of API keys to be used by your service API Gateway REST API
- myFirstKey
value: myFirstKeyValue
description: myFirstKeyDescription
customerId: myFirstKeyCustomerId
- ${opt:stage}-myFirstKey
- ${env:MY_API_KEY} # you can hide it in a serverless variable
apiGateway: # Optional API Gateway global config
restApiId: xxxxxxxxxx # REST API resource ID. Default is generated by the framework
restApiRootResourceId: xxxxxxxxxx # Root resource ID, represent as / path
restApiResources: # List of existing resources that were created in the REST API. This is required or the stack will be conflicted
'/users': xxxxxxxxxx
'/users/create': xxxxxxxxxx
websocketApiId: # Websocket API resource ID. Default is generated by the framework
apiKeySourceType: HEADER # Source of API key for usage plan. HEADER or AUTHORIZER.
minimumCompressionSize: 1024 # Compress response when larger than specified size in bytes (must be between 0 and 10485760)
description: Some Description # Optional description for the API Gateway stage deployment
binaryMediaTypes: # Optional binary media types the API might return
- '*/*'
metrics: false # Optional detailed Cloud Watch Metrics
shouldStartNameWithService: false # Use `${service}-${stage}` naming for API Gateway. Will be `true` by default in next major version.
alb:
targetGroupPrefix: xxxxxxxxxx # Optional prefix to prepend when generating names for target groups
authorizers:
myFirstAuth:
type: 'cognito'
userPoolArn: 'arn:aws:cognito-idp:us-east-1:123412341234:userpool/us-east-1_123412341', # required
userPoolClientId: '1h57kf5cpq17m0eml12EXAMPLE', # required
userPoolDomain: 'your-test-domain' # required
onUnauthenticatedRequest: 'deny' # If set to 'allow' this allows the request to be forwarded to the target when user is not authenticated. When omitted it defaults 'deny' which makes a HTTP 401 Unauthorized error be returned. Alternatively configure to 'authenticate' to redirect request to IdP authorization endpoint.
requestExtraParams: # optional. The query parameters (up to 10) to include in the redirect request to the authorization endpoint
prompt: 'login'
redirect: false
scope: 'first_name age' # Can be a combination of any system-reserved scopes or custom scopes associated with the client. The default is openid
sessionCookieName: '🍪' # The name of the cookie used to maintain session information. The default is AWSELBAuthSessionCookie
sessionTimeout: 7000 # The maximum duration of the authentication session, in seconds. The default is 604800 seconds (7 days).
mySecondAuth:
type: 'oidc'
authorizationEndpoint: 'https://example.com', # required. The authorization endpoint of the IdP. Must be a full URL, including the HTTPS protocol, the domain, and the path
clientId: 'i-am-client', # required
clientSecret: 'i-am-secret', # if creating a rule this is required. If modifying a rule, this can be omitted if you set useExistingClientSecret to true (as below)
useExistingClientSecret: true # only required if clientSecret is omitted
issuer: 'https://www.iamscam.com', # required. The OIDC issuer identifier of the IdP. This must be a full URL, including the HTTPS protocol, the domain, and the path
tokenEndpoint: 'http://somewhere.org', # required
userInfoEndpoint: 'https://another-example.com' # required
onUnauthenticatedRequest: 'deny' # If set to 'allow' this allows the request to be forwarded to the target when user is not authenticated. Omit or set to 'deny' (default) to make a HTTP 401 Unauthorized error be returned instead. Alternatively configure to 'authenticate' to redirect request to IdP authorization endpoint.
requestExtraParams:
prompt: 'login'
redirect: false
scope: 'first_name age'
sessionCookieName: '🍪'
sessionTimeout: 7000
httpApi:
id: 'my-id' # If we want to attach to externally created HTTP API its id should be provided here
name: 'dev-my-service' # Use custom name for the API Gateway API, default is ${opt:stage, self:provider.stage, 'dev'}-${self:service}
payload: '1.0' # Specify payload format version for Lambda integration ('1.0' or '2.0'), default is '1.0'
cors: true # Implies default behavior, can be fine tuned with specficic options
authorizers:
# JWT authorizers to back HTTP API endpoints
someJwtAuthorizer:
identitySource: $request.header.Authorization
issuerUrl: https://cognito-idp.us-east-1.amazonaws.com/us-east-1_xxxxx
audience:
- xxxx
- xxxx
usagePlan: # Optional usage plan configuration
quota:
limit: 5000
offset: 2
period: MONTH
throttle:
burstLimit: 200
rateLimit: 100
stackTags: # Optional CF stack tags
key: value
iamManagedPolicies: # Optional IAM Managed Policies, which allows to include the policies into IAM Role
- arn:aws:iam:*****:policy/some-managed-policy
iamRoleStatements: # IAM role statements so that services can be accessed in the AWS account
- Effect: 'Allow'
Action:
- 's3:ListBucket'
Resource:
Fn::Join:
- ''
- - 'arn:aws:s3:::'
- Ref: ServerlessDeploymentBucket
stackPolicy: # Optional CF stack policy. The example below allows updates to all resources except deleting/replacing EC2 instances (use with caution!)
- Effect: Allow
Principal: '*'
Action: 'Update:*'
Resource: '*'
- Effect: Deny
Principal: '*'
Resource: '*'
Action:
- Update:Replace
- Update:Delete
Condition:
StringEquals:
ResourceType:
- AWS::EC2::Instance
vpc: # Optional VPC. But if you use VPC then both subproperties (securityGroupIds and subnetIds) are required
securityGroupIds:
- securityGroupId1
- securityGroupId2
subnetIds:
- subnetId1
- subnetId2
notificationArns: # List of existing Amazon SNS topics in the same region where notifications about stack events are sent.
- 'arn:aws:sns:us-east-1:XXXXXX:mytopic'
stackParameters:
- ParameterKey: 'Keyname'
ParameterValue: 'Value'
resourcePolicy:
- Effect: Allow
Principal: '*'
Action: execute-api:Invoke
Resource:
- execute-api:/*/*/*
Condition:
IpAddress:
aws:SourceIp:
- '123.123.123.123'
rollbackConfiguration:
MonitoringTimeInMinutes: 20
RollbackTriggers:
- Arn: arn:aws:cloudwatch:us-east-1:000000000000:alarm:health
Type: AWS::CloudWatch::Alarm
- Arn: arn:aws:cloudwatch:us-east-1:000000000000:alarm:latency
Type: AWS::CloudWatch::Alarm
tags: # Optional service wide function tags
foo: bar
baz: qux
tracing:
apiGateway: true
lambda: true # Optional, can be true (true equals 'Active'), 'Active' or 'PassThrough'
logs:
restApi: # Optional configuration which specifies if API Gateway logs are used. This can either be set to `true` to use defaults, or configured via subproperties.
accessLogging: true # Optional configuration which enables or disables access logging. Defaults to true.
format: 'requestId: $context.requestId' # Optional configuration which specifies the log format to use for access logging.
executionLogging: true # Optional configuration which enables or disables execution logging. Defaults to true.
level: INFO # Optional configuration which specifies the log level to use for execution logging. May be set to either INFO or ERROR.
fullExecutionData: true # Optional configuration which specifies whether or not to log full requests/responses for execution logging. Defaults to true.
role: arn:aws:iam::123456:role # Existing IAM role for ApiGateway to use when managing CloudWatch Logs. If 'role' is not configured, a new role is automatically created.
roleManagedExternally: false # Specifies whether the ApiGateway CloudWatch Logs role setting is not managed by Serverless. Defaults to false.
websocket: # Optional configuration which specifies if Websocket logs are used. This can either be set to `true` to use defaults, or configured via subproperties.
level: INFO # Optional configuration which specifies the log level to use for execution logging. May be set to either INFO or ERROR.
httpApi: # Optional configuration which specifies if HTTP API logs are used. This can either be set to `true` (to use defaults as below) or specific log format configuration can be provided
format: '{ "requestId":"$context.requestId", "ip": "$context.identity.sourceIp", "requestTime":"$context.requestTime", "httpMethod":"$context.httpMethod","routeKey":"$context.routeKey", "status":"$context.status","protocol":"$context.protocol", "responseLength":"$context.responseLength" }'
frameworkLambda: true # Optional, whether to write CloudWatch logs for custom resource lambdas as added by the framework
package: # Optional deployment packaging configuration
include: # Specify the directories and files which should be included in the deployment package
- src/**
- handler.js
exclude: # Specify the directories and files which should be excluded in the deployment package
- .git/**
- .travis.yml
excludeDevDependencies: false # Config if Serverless should automatically exclude dev dependencies in the deployment package. Defaults to true
artifact: path/to/my-artifact.zip # Own package that should be used. You must provide this file.
individually: true # Enables individual packaging for each function. If true you must provide package for each function. Defaults to false
functions:
usersCreate: # A Function
handler: users.create # The file and module for this specific function.
name: ${opt:stage, self:provider.stage, 'dev'}-lambdaName # optional, Deployed Lambda name
description: My function # The description of your function.
memorySize: 512 # memorySize for this specific function.
reservedConcurrency: 5 # optional, reserved concurrency limit for this function. By default, AWS uses account concurrency limit
provisionedConcurrency: 3 # optional, Count of provisioned lambda instances
runtime: nodejs12.x # Runtime for this specific function. Overrides the default which is set on the provider level
timeout: 10 # Timeout for this specific function. Overrides the default set above.
role: arn:aws:iam::XXXXXX:role/role # IAM role which will be used for this function
onError: arn:aws:sns:us-east-1:XXXXXX:sns-topic # Optional SNS topic / SQS arn (Ref, Fn::GetAtt and Fn::ImportValue are supported as well) which will be used for the DeadLetterConfig
kmsKeyArn: arn:aws:kms:us-east-1:XXXXXX:key/some-hash # Optional KMS key arn which will be used for encryption (overwrites the one defined on the provider level)
disableLogs: false # Disables creation of CloudWatch Log Group
environment: # Function level environment variables
functionEnvVar: 12345678
tags: # Function specific tags
foo: bar
vpc: # Optional VPC. But if you use VPC then both subproperties (securityGroupIds and subnetIds) are required
securityGroupIds:
- securityGroupId1
- securityGroupId2
subnetIds:
- subnetId1
- subnetId2
package:
include: # Specify the directories and files which should be included in the deployment package for this specific function.
- src/**
- handler.js
exclude: # Specify the directories and files which should be excluded in the deployment package for this specific function.
- .git/**
- .travis.yml
artifact: path/to/my-artifact.zip # Own package that should be use for this specific function. You must provide this file.
individually: true # Enables individual packaging for specific function. If true you must provide package for each function. Defaults to false
layers: # An optional list Lambda Layers to use
- arn:aws:lambda:region:XXXXXX:layer:LayerName:Y # Layer Version ARN
tracing: Active # optional, can be 'Active' or 'PassThrough' (overwrites the one defined on the provider level)
condition: SomeCondition # optional, adds 'Condition' clause
dependsOn: # optional, appends these additional resources to the 'DependsOn' list
- MyThing
- MyOtherThing
destinations: # optional, destinations for async invocations
onSuccess: functionName # function name or ARN of a target (externally managed lambda, EventBridge event bus, SQS queue or SNS topic)
onFailure: xxx:xxx:target # function name or ARN of a target (externally managed lambda, EventBridge event bus, SQS queue or SNS topic)
fileSystemConfig:
arn: arn:aws:elasticfilesystem:us-east-1:111111111111:access-point/fsap-a1a1a1a1a1a1a1a1a # ARN of EFS Access Point
localMountPath: /mnt/example # path under which EFS will be mounted and accessible by Lambda function
events: # The Events that trigger this Function
- http: # This creates an API Gateway HTTP endpoint which can be used to trigger this function. Learn more in "events/apigateway"
path: users/create # Path for this endpoint
method: get # HTTP method for this endpoint
cors: true # Turn on CORS for this endpoint, but don't forget to return the right header in your response
private: true # Requires clients to add API keys values in the `x-api-key` header of their request
authorizer: # An AWS API Gateway custom authorizer function
name: authorizerFunc # The name of the authorizer function (must be in this service)
arn: xxx:xxx:Lambda-Name # Can be used instead of name to reference a function outside of service
resultTtlInSeconds: 0
identitySource: method.request.header.Authorization
identityValidationExpression: someRegex
type: token # token or request. Determines input to the authorizer function, called with the auth token or the entire request event. Defaults to token
request: # configure method request and integration request settings
uri: http://url/{paramName} # Define http endpoint URL and map path parameters for HTTP and HTTP_PROXY requests
parameters: # Optional request parameter configuration
paths:
paramName: true # mark path parameter as required
headers:
headerName: true # mark header required
custom-header: # Optional add a new header to the request
required: true
mappedValue: context.requestId # map the header to a static value or integration request variable
querystrings:
paramName: true # mark query string
schema: # Optional request schema validation; mapped by content type
application/json: ${file(create_request.json)} # define the valid JSON Schema for a content-type
template: # Optional custom request mapping templates that overwrite default templates
application/json: '{ "httpMethod" : "$context.httpMethod" }'
passThrough: NEVER # Optional define pass through behavior when content-type does not match any of the specified mapping templates
- httpApi: # HTTP API endpoint
method: GET
path: /some-get-path/{param}
authorizer: # Optional
name: someJwtAuthorizer # References by name authorizer defined in provider.httpApi.authorizers section
scopes: # Optional
- user.id
- user.email
- websocket:
route: $connect
routeResponseSelectionExpression: $default # optional, setting this enables callbacks on websocket requests for two-way communication
authorizer:
# name: auth NOTE: you can either use "name" or arn" properties
arn: arn:aws:lambda:us-east-1:1234567890:function:auth
identitySource:
- 'route.request.header.Auth'
- 'route.request.querystring.Auth'
- s3:
bucket: photos
event: s3:ObjectCreated:*
rules:
- prefix: uploads/
- suffix: .jpg
existing: true # optional, if you're using an existing Bucket
- schedule:
name: my scheduled event
description: a description of my scheduled event's purpose
rate: rate(10 minutes)
enabled: false
# Note, you can use only one of input, inputPath, or inputTransformer
input:
key1: value1
key2: value2
stageParams:
stage: dev
inputPath: '$.stageVariables'
inputTransformer:
inputPathsMap:
eventTime: '$.time'
inputTemplate: '{"time": <eventTime>, "key1": "value1"}'
- sns:
topicName: aggregate
displayName: Data aggregation pipeline
filterPolicy:
pet:
- dog
- cat
redrivePolicy:
# (1) ARN
deadLetterTargetArn: arn:aws:sqs:us-east-1:11111111111:myDLQ
# (2) Ref (resource defined in same CF stack)
deadLetterTargetRef: myDLQ
# (3) Import (resource defined in outer CF stack)
deadLetterTargetImport:
arn: MyShared-DLQArn
url: MyShared-DLQUrl
- sqs:
arn: arn:aws:sqs:region:XXXXXX:myQueue
batchSize: 10
enabled: true
- stream:
arn: arn:aws:kinesis:region:XXXXXX:stream/foo
batchSize: 100
maximumRecordAgeInSeconds: 120
startingPosition: LATEST
enabled: true
- msk:
arn: arn:aws:kafka:us-east-1:111111111111:cluster/ClusterName/a1a1a1a1a1a1a1a1a # ARN of MSK Cluster
topic: kafkaTopic # name of Kafka topic to consume from
batchSize: 100 # optional, must be in 1-10000 range
startingPosition: LATEST # optional, can be set to LATEST or TRIM_HORIZON
enabled: true # optional, true by default, can be used to disable event without deleting resource
- alexaSkill:
appId: amzn1.ask.skill.xx-xx-xx-xx
enabled: true
- alexaSmartHome:
appId: amzn1.ask.skill.xx-xx-xx-xx
enabled: true
- iot:
name: myIoTEvent
description: An IoT event
enabled: true
sql: "SELECT * FROM 'some_topic'"
sqlVersion: beta
- cloudwatchEvent:
event:
source:
- 'aws.ec2'
detail-type:
- 'EC2 Instance State-change Notification'
detail:
state:
- pending
# Note, you can use only one of input, inputPath, or inputTransformer
input:
key1: value1
key2: value2
stageParams:
stage: dev
inputPath: '$.stageVariables'
inputTransformer:
inputPathsMap:
eventTime: '$.time'
inputTemplate: '{"time": <eventTime>, "key1": "value1"}'
- cloudwatchLog:
logGroup: '/aws/lambda/hello'
filter: '{$.userIdentity.type = Root}'
- cognitoUserPool:
pool: MyUserPool
trigger: PreSignUp
existing: true # optional, if you're referencing an existing User Pool
- alb:
listenerArn: arn:aws:elasticloadbalancing:us-east-1:12345:listener/app/my-load-balancer/50dc6c495c0c9188/
priority: 1
conditions:
host: example.com
path: /hello
healthCheck: # optional, can also be set using a boolean value
path: / # optional
intervalSeconds: 35 # optional
timeoutSeconds: 30 # optional
healthyThresholdCount: 5 # optional
unhealthyThresholdCount: 5 # optional
matcher: # optional
httpCode: '200'
- eventBridge:
# using the default AWS event bus
schedule: rate(10 minutes)
# creating an event bus
eventBus: custom-saas-events
pattern:
source:
- saas.external
# re-using an existing event bus
eventBus: arn:aws:events:us-east-1:12345:event-bus/custom-private-events
pattern:
source:
- custom.private
inputTransformer:
inputPathsMap:
eventTime: '$.time'
inputTemplate: '{"time": <eventTime>, "key1": "value1"}'
# using `inputs`
pattern:
source:
- 'aws.ec2'
detail-type:
- 'EC2 Instance State-change Notification'
detail:
state:
- pending
input:
key1: value1
key2: value2
stageParams:
stage: dev
# using `inputPath`
pattern:
source:
- 'aws.ec2'
detail-type:
- 'EC2 Instance State-change Notification'
detail:
state:
- pending
inputPath: '$.stageVariables'
# using `inputTransformer`
pattern:
source:
- 'aws.ec2'
detail-type:
- 'EC2 Instance State-change Notification'
detail:
state:
- pending
inputTransformer:
inputPathsMap:
eventTime: '$.time'
inputTemplate: '{"time": <eventTime>, "key1": "value1"}'
- cloudFront:
eventType: viewer-response
includeBody: true
pathPattern: /docs*
cachePolicy:
# Note, you can use only one of name or id
name: myCachePolicy1 # Refers to a Cache Policy defined in provider.cloudFront.cachePolicies
id: 658327ea-f89d-4fab-a63d-7e88639e58f6 # Refers to any external Cache Policy id
origin:
DomainName: serverless.com
OriginPath: /framework
CustomOriginConfig:
OriginProtocolPolicy: match-viewer
configValidationMode: warn # Modes for config validation. `error` throws an exception, `warn` logs error to console, `off` disables validation at all. The default is warn.
layers:
hello: # A Lambda layer
path: layer-dir # required, path to layer contents on disk
name: ${opt:stage, self:provider.stage, 'dev'}-layerName # optional, Deployed Lambda layer name
description: Description of what the lambda layer does # optional, Description to publish to AWS
compatibleRuntimes: # optional, a list of runtimes this layer is compatible with
- python3.8
licenseInfo: GPLv3 # optional, a string specifying license information
allowedAccounts: # optional, a list of AWS account IDs allowed to access this layer.
- '*'
retain: false # optional, false by default. If true, layer versions are not deleted as new ones are created
# The "Resources" your "Functions" use. Raw AWS CloudFormation goes in here.
resources:
Resources:
usersTable:
Type: AWS::DynamoDB::Table
Properties:
TableName: usersTable
AttributeDefinitions:
- AttributeName: email
AttributeType: S
KeySchema:
- AttributeName: email
KeyType: HASH
ProvisionedThroughput:
ReadCapacityUnits: 1
WriteCapacityUnits: 1
extensions:
# override Properties or other attributes of Framework-created resources.
# See https://serverless.com/framework/docs/providers/aws/guide/resources#override-aws-cloudformation-resource for more details
UsersCreateLogGroup:
Properties:
RetentionInDays: '30'
# The "Outputs" that your AWS CloudFormation Stack should produce. This allows references between services.
Outputs:
UsersTableArn:
Description: The ARN for the User's Table
Value:
'Fn::GetAtt': [usersTable, Arn]
Export:
Name: ${self:service}:${opt:stage}:UsersTableArn # see Fn::ImportValue to use in other services and http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/outputs-section-structure.html for documentation on use.
```
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