skyflow-js

skyflow-js

Skyflow’s Javascript SDK can be used to securely collect, tokenize, and reveal sensitive data in the browser without exposing your front-end infrastructure to sensitive data.

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Table of Contents

• Including Skyflow.js
• Initializing Skyflow.js
• Securely collecting data client-side
• Securely revealing data client-side
• Securely invoking gateway client-side

---

Including Skyflow.js

Using script tag

<script src="https://js.skyflow.com/v1/index.js"></script>

Using npm

npm install skyflow-js

---

Initializing Skyflow.js

Use the init() method to initialize a Skyflow client as shown below.

import Skyflow from "skyflow-js" // If using script tag, this line is not required

const skyflowClient = Skyflow.init({
   vaultID: "string",          //Id of the vault that the client should connect to 
   vaultURL: "string",         //URL of the vault that the client should connect to
   getBearerToken: helperFunc,  //helper function that retrieves a Skyflow bearer token from your backend
   options:{
     logLevel: Skyflow.LogLevel, // optional, if not specified default is ERROR 
     env: Skyflow.Env          // optional, if not specified default is PROD 
   }
})

For the getBearerToken parameter, pass in a helper function that retrieves a Skyflow bearer token from your backend. This function will be invoked when the SDK needs to insert or retrieve data from the vault. A sample implementation is shown below:

For example, if the response of the consumer tokenAPI is in the below format

{
   "accessToken": string,
   "tokenType": string
}

then, your getBearerToken Implementation should be as below

getBearerToken: () => {
  return new Promise((resolve, reject) => {
    const Http = new XMLHttpRequest();

    Http.onreadystatechange = () => {
      if (Http.readyState == 4) {
        if (Http.status == 200) {
          const response = JSON.parse(Http.responseText);
          resolve(response.accessToken);
        } else {
          reject("Error occured");
        }
      }
    };

    Http.onerror = (error) => {
      reject("Error occured");
    };

    const url = "https://api.acmecorp.com/skyflowToken";
    Http.open("GET", url);
    Http.send();
  })

}

For logLevel parameter, there are 4 accepted values in Skyflow.LogLevel

• DEBUG

  When Skyflow.LogLevel.DEBUG is passed, all level of logs will be printed(DEBUG, INFO, WARN, ERROR).

• INFO

  When Skyflow.LogLevel.INFO is passed, INFO logs for every event that has occurred during the SDK flow execution will be printed along with WARN and ERROR logs.

• WARN

  When Skyflow.LogLevel.WARN is passed, WARN and ERROR logs will be printed.

• ERROR

  When Skyflow.LogLevel.ERROR is passed, only ERROR logs will be printed.

Note:

• The ranking of logging levels is as follows : DEBUG < INFO < WARN < ERROR
• since logLevel is optional, by default the logLevel will be ERROR.

For env parameter, there are 2 accepted values in Skyflow.Env

• PROD

• DEV

  In Event Listeners, actual value of element can only be accessed inside the handler when the env is set to DEV.

Note:

• since env is optional, by default the env will be PROD.
• Use env option with caution, make sure the env is set to PROD when using skyflow-js in production.

---

Securely collecting data client-side

• Inserting data into the vault
• Using Skyflow Elements to collect data
• Event Listener on Collect Elements

Inserting data into the vault

To insert data into the vault from the browser, use the insert(records, options?) method of the Skyflow client. The records parameter takes a JSON object of the records to be inserted in the below format. The options parameter takes a dictionary of optional parameters for the insertion. See below:

var records = {
  "records": [
  	{
      table: "string", //table into which record should be inserted
      fields: {
        column1: "value", //column names should match vault column names
        //...additional fields here
      }
    }
    //...additional records here
  ]
}

var options = {
  tokens: true  //indicates whether or not tokens should be returned for the inserted data. Defaults to 'true'  
}

skyflowClient.insert(records, options={})

An example of an insert call:

skyflowClient.insert({
  "records": [
  {
    "table": "cards",
    "fields": {
      "cardNumber": "41111111111",
      "cvv": "123",
    }
  }]
});

The sample response:

{
  "records": [
    {
     "table": "cards",
     "fields":{
        "cardNumber": "f3907186-e7e2-466f-91e5-48e12c2bcbc1",
        "cvv": "1989cb56-63da-4482-a2df-1f74cd0dd1a5"
      }
    }
  ]
}

Using Skyflow Elements to collect data

Skyflow Elements provide developers with pre-built form elements to securely collect sensitive data client-side. These elements are hosted by Skyflow and injected into your web page as iframes. This reduces your PCI compliance scope by not exposing your front-end application to sensitive data. Follow the steps below to securely collect data with Skyflow Elements on your web page.

Step 1: Create a container

First create a container for the form elements using the container(Skyflow.ContainerType) method of the Skyflow client as show below:

const container = skyflowClient.container(Skyflow.ContainerType.COLLECT)

Step 2: Create a collect Element

A Skyflow collect Element is defined as shown below:

var collectElement =  {
   table: "string",             //optional, the table this data belongs to
   column: "string",            //optional, the column into which this data should be inserted
   type: Skyflow.ElementType,   //Skyflow.ElementType enum
   inputStyles: {},             //optional styles that should be applied to the form element
   labelStyles: {},             //optional styles that will be applied to the label of the collect element
   errorTextStyles:{},          //optional styles that will be applied to the errorText of the collect element
   label: "string",             //optional label for the form element
   placeholder: "string",       //optional placeholder for the form element
   altText: "string"            //optional string that acts as an initial value for the collect element
}

The table and column fields indicate which table and column in the vault the Element corresponds to. Note:

• Use dot delimited strings to specify columns nested inside JSON fields (e.g. address.street.line1)
• table and column are optional only if the element is being used in invokeGateway()

The inputStyles field accepts a style object which consists of CSS properties that should be applied to the form element in the following states:

• base: all other variants inherit from these styles
• complete: applied when the Element has valid input
• empty: applied when the Element has no input
• focus: applied when the Element has focus
• invalid: applied when the Element has invalid input

Styles are specified with JSS.

An example of a inputStyles object:

inputStyles:{
    base: {
      border: "1px solid #eae8ee",
      padding: "10px 16px",
      borderRadius: "4px",
      color: "#1d1d1d",
    },
    complete: {
      color: "#4caf50",
    },
    empty: {},
    focus: {},
    invalid: {
      color: "#f44336",
    },
  }
}

The states that are available for labelStyles are base and focus.

An example of a labelStyles object:

labelStyles: {
    base: {
      fontSize: "12px",
      fontWeight: "bold"
    },
    focus: {
      color: "#1d1d1d"
    }
}

The state that is available for errorTextStyles is only the base state, it shows up when there is some error in the collect element.

An example of a errorTextStyles object:

errorTextStyles: {
    base: {
      color: "#f44336"
    }
}

Finally, the type field takes a Skyflow ElementType. Each type applies the appropriate regex and validations to the form element. There are currently 4 types:

• CARDHOLDER_NAME
• CARD_NUMBER
• EXPIRATION_DATE
• CVV

Once the Element object has been defined, add it to the container using the create(element, options) method as shown below. The element param takes a Skyflow Element object as defined above and the options parameter takes a dictionary of optional parameters as described below:

var collectElement =  {
   table: "string",             //the table this data belongs to
   column: "string",            //the column into which this data should be inserted
   type: Skyflow.ElementType,   //Skyflow.ElementType enum
   inputStyles: {},             //optional styles that should be applied to the form element
   labelStyles: {},             //optional styles that will be applied to the label of the collect element
   errorTextStyles:{},          //optional styles that will be applied to the errorText of the collect element
   label: "string",             //optional label for the form element
   placeholder: "string",       //optional placeholder for the form element
   altText: "string"            //optional string that acts as an initial value for the collect element
}

var options = {
  required: false  //indicates whether the field is marked as required. Defaults to 'false'
}

const element = container.create(collectElement, options)

Step 3: Mount Elements to the DOM

To specify where the Elements will be rendered on your page, create placeholder <div> elements with unique id tags. For instance, the form below has 4 empty divs with unique ids as placeholders for 4 Skyflow Elements.

<form>
  <div id="cardNumber"/>
  <br/>
  <div id="expireDate"/>
  <br/> 
  <div id="cvv"/>
  <br/>
  <div id="pin"/>
  <button type="submit">Submit</button>
</form>

Now, when the mount(domElement) method of the Element is called, the Element will be inserted in the specified div. For instance, the call below will insert the Element into the div with the id "#cardNumber".

element.mount("#cardNumber")

Step 4: Collect data from Elements

When the form is ready to be submitted, call the collect(options?) method on the container object. The options parameter takes a dictionary of optional parameters as shown below:

• tokens: indicates whether tokens for the collected data should be returned or not. Defaults to 'true'
• additionalFields: Non-PCI elements data to be inserted into the vault which should be in the records object format as described in the above Inserting data into vault section.

var options = {
  tokens: true  //optional, indicates whether tokens for the collected data should be returned. Defaults to 'true'
  additionalFields: {  
    records: [
      {
        table: "string", //table into which record should be inserted
        fields: {
          column1: "value", //column names should match vault column names
          //...additional fields here
        }
      }
      //...additional records here
    ]
  } //optional
}

container.collect(options={})

End to end example of collecting data with Skyflow Elements

Sample Code:

//Step 1
const container = skyflowClient.container(Skyflow.ContainerType.COLLECT) 

//Step 2
const element = container.create({           
  table: "cards",
  column: "cardNumber",
  inputstyles: {
      base: {
        color: "#1d1d1d",
      },
  },
  labelStyles: {
      base: {
        fontSize: "12px",
        fontWeight: "bold"
      }
  },
  errorTextStyles: {
      base: {
        color: "#f44336"
      }
  },
  placeholder: "Card Number",
  label: "card_number",
  type: Skyflow.ElementType.CARD_NUMBER
})

// Step 3
element.mount("#cardNumber")  //assumes there is a div with id="#cardNumber" in the webpage

// Step 4

const nonPCIRecords = {
    "records": [
      {
        "table": "cards",
        "fields": {
          "gender": "MALE"
        }
      }
    ]
  }

container.collect({
  tokens: true,
  additionalFields: nonPCIRecords
})

Sample Response :

{
  "records": [
    {
      "table": "cards",
      "fields": {
        "cardNumber": "f3907186-e7e2-466f-91e5-48e12c2bcbc1",
        "gender": "12f670af-6c7d-4837-83fb-30365fbc0b1e"
      }
    }
  ]
}

Event Listener on Collect Elements

Helps to communicate with skyflow elements / iframes by listening to an event

element.on(Skyflow.EventName,handler:function)

There are 4 events in Skyflow.EventName

• CHANGE
  Change event is triggered when the Element's value changes.

• READY
  Ready event is triggered when the Element is fully rendered

• FOCUS
  Focus event is triggered when the Element gains focus

• BLUR
  Blur event is triggered when the Element loses focus.

The handler function(state) => void is a callback function you provide, that will be called when the event is fired with the state object as shown below.

state : {
  elementType: Skyflow.ElementType
  isEmpty: boolean 
  isFocused: boolean
  isValid: boolean
  value: string
}

Note: values of SkyflowElements will be returned in elementstate object only when env is DEV, else it is empty string i.e, ''

Sample code snippet for using listeners

//create skyflow client with loglevel:"DEBUG"
const skyflowClient = Skyflow.init({
   vaultID: <VAULT_ID>,          
   vaultURL: <VAULT_URL>,
   getBearerToken: ()=>{},
   options: { 
     env: Skyflow.Env.DEV
   }
})

const container = skyflowClient.container(Skyflow.ContainerType.COLLECT)

const cardNumber = container.create({
        table: "pii_fields",
        column: "primary_card.card_number",
        type: Skyflow.ElementType.CARD_NUMBER,
      });

cardNumber.mount("#cardNumberContainer");

//subscribing to CHANGE event, which gets triggered when element changes
cardNumber.on(Skyflow.EventName.CHANGE,(state) => {
  // Your implementation when Change event occurs
  console.log(state)
});

Sample Element state object when env is DEV

{
   elementType: "CARD_NUMBER"
   isEmpty: false
   isFocused: true
   isValid: false
   value: "411"
}

Sample Element state object when env is PROD

{
   elementType: "CARD_NUMBER"
   isEmpty: false
   isFocused: true
   isValid: false
   value: ''
}

---

Securely revealing data client-side

• Retrieving data from the vault
• Using Skyflow Elements to reveal data

Retrieving data from the vault

For non-PCI use-cases, retrieving data from the vault and revealing it in the browser can be done either using the SkyflowID's or tokens as described below

• Using Skyflow tokens

  For retrieving using tokens, use the detokenize(records) method. The records parameter takes a JSON object that contains records to be fetched as shown below.

var records = {
  "records": [
      {
        token: "string",                    // token for the record to be fetched
      }
  ]
}

skyflow.detokenize(records)

An example of a detokenize call:

skyflow.detokenize({
  "records": [
    {
      token: "131e70dc-6f76-4319-bdd3-96281e051051"
    }
  ]
})

The sample response:

{
  "records": [
    {
      "token": "131e70dc-6f76-4319-bdd3-96281e051051",
      "value": "1990-01-01",
    }
  ]
}

• Using Skyflow ID's

  For retrieving using SkyflowID's, use the getById(records) method.The records parameter takes a JSON object that contains records to be fetched as shown below.

{
  "records": [
    {
      ids: string[],                      // array of SkyflowID's of the records to be fetched
      table: string                       // table holding the above skyflow_id's
      redaction: Skyflow.RedactionType    // redaction to be applied to retrieved data
    }
  ]
}

There are 4 accepted values in Skyflow.RedactionTypes:

• PLAIN_TEXT
• MASKED
• REDACTED
• DEFAULT

An example of getById call:

skyflow.getById({
  records: [
    {
      ids: ["f8d8a622-b557-4c6b-a12c-c5ebe0b0bfd9"],
      table: "cards",
      redaction: Skyflow.RedactionType.PLAIN_TEXT,
    },
    {
      ids: ["da26de53-95d5-4bdb-99db-8d8c66a35ff9"],
      table: "contacts",
      redaction: Skyflow.RedactionType.PLAIN_TEXT,
    },
  ],
});

The sample response:

{
    "records": [
        {
            "fields": {
                "card_number": "4111111111111111",
                "cvv": "127",
                "expiry_date": "11/2035",
                "fullname": "myname",
                "id": "f8d8a622-b557-4c6b-a12c-c5ebe0b0bfd9"
            },
            "table": "cards"
        }
    ],
    "errors": [
        {
            "error": {
                "code": "404",
                "description": "No Records Found"
            },
            "ids": ["da26de53-95d5-4bdb-99db-8d8c66a35ff9"]
        }
    ]
}

Using Skyflow Elements to reveal data

Skyflow Elements can be used to securely reveal data in a browser without exposing your front end to the sensitive data. This is great for use cases like card issuance where you may want to reveal the card number to a user without increasing your PCI compliance scope.

Step 1: Create a container

To start, create a container using the container(Skyflow.ContainerType) method of the Skyflow client as shown below.

const container = skyflowClient.container(Skyflow.ContainerType.REVEAL)

Step 2: Create a reveal Element

Then define a Skyflow Element to reveal data as shown below.

var revealElement = {
  token: "string",                    //optional, token of the data being revealed 
  inputStyles: {},                    //optional styles to be applied to the element
  labelStyles: {},                    //optional, styles to be applied to the label of the reveal element
  errorTextStyles: {},                //optional styles that will be applied to the errorText of the reveal element
  label: "string",                     //label for the form element
  altText: "string"                   //optional, string that is shown before reveal, will show token if altText is not provided
}

Note:

• token is optional only if it is being used in invokeGateway()

The inputStyles, labelStyles and errorTextStyles parameters accepts a styles object as described in the previous section for collecting data but only a single variant is available i.e. base.

An example of a inputStyles object:

inputStyles: {
    base: {
      color: "#1d1d1d"
    }
}

An example of a labelStyles object:

labelStyles: {
    base: {
      fontSize: "12px",
      fontWeight: "bold"
    }
}

An example of a errorTextStyles object:

errorTextStyles: {
    base: {
      color: "#f44336"
    }
}

Once you've defined a Skyflow Element, you can use the create(element) method of the container to create the Element as shown below:

const element = container.create(revealElement, options={})

Step 3: Mount Elements to the DOM

Elements used for revealing data are mounted to the DOM the same way as Elements used for collecting data. Refer to Step 3 of the section above.

Step 4: Reveal data

When the sensitive data is ready to be retrieved and revealed, call the reveal() method on the container as shown below:

container.reveal()
  .then((data) => {
    //handle success
  })
  .catch((err) => {
    //handle error
  })

End to end example of all steps

//Step 1
const container = skyflowClient.container(Skyflow.ContainerType.REVEAL)

//Step 2
const cardNumberElement = container.create({             
  token: "b63ec4e0-bbad-4e43-96e6-6bd50f483f75",
  inputStyles: {
      base: {
        color: "#1d1d1d",
      },
  },
  labelStyles: {
    base: {
      fontSize: "12px",
    }
  },
  errorTextStyles: {
    base: {
      color: "#f44336"
    }
  }, 
  label: "card_number",
  altText: "XXXX XXXX XXXX XXXX" 
})

const cvvElement = container.create({             
  token: "89024714-6a26-4256-b9d4-55ad69aa4047",
  inputStyles: {
      base: {
        color: "#1d1d1d",
      },
    },
  label: "cvv",
  altText: "XXX" 
})

//Step 3
cardNumberElement.mount("#cardNumber")  //assumes there is a placeholder div with id="#cardNumber" on the page
cvvElement.mount("#cvv")  //assumes there is a placeholder div with id="#cvv" on the page
                                        
//Step 4    
container                                       
 .reveal()                              
 .then((data) => {
   //handle success
 })
 .catch((err) => {
   //handle error
 });

The response below shows that some tokens assigned to the reveal elements get revealed successfully, while others fail and remain unrevealed.

Sample Response

{
  "success": [
    {
      "token": "b63ec4e0-bbad-4e43-96e6-6bd50f483f75"
    }
  ],
 "errors": [
    {
       "token": "89024714-6a26-4256-b9d4-55ad69aa4047",
       "error": {
         "code": 404,
         "description": "Tokens not found for 89024714-6a26-4256-b9d4-55ad69aa4047"
       } 
   }   
  ]
}

Securely invoking gateway client-side

Using Skyflow gateway, end-user applications can integrate checkout/card issuance flow without any of their apps/systems touching the PCI compliant fields like cvv, card number. To invoke gateway, use the invokeGateway(gatewayConfig) method of the Skyflow client.

const gatewayConfig = {
  gatewayURL: string, // gateway url recevied when creating a skyflow gateway integration
  methodName: Skyflow.RequestMethod,
  pathParams: any,	// optional
  queryParams: any,	// optional
  requestHeader: any, // optional
  requestBody: any,	// optional
  responseBody: any	// optional
}

const response =  skyflowClient.invokeGateway(gatewayConfig);

methodName supports the following methods:

• GET
• POST
• PUT
• PATCH
• DELETE

pathParams, queryParams, requestHeader, requestBody are the JSON objects that will be sent through the gateway integration url.

The values in the above parameters can contain collect elements, reveal elements or actual values. When elements are provided inplace of values, they get replaced with the value entered in the collect elements or value present in the reveal elements

responseBody:
It is a JSON object that specifies where to render the response in the UI. The values in the responseBody can contain collect elements or reveal elements.

Sample use-cases on using invokeGateway():

Sample use-case 1:

Merchant acceptance - customers should be able to complete payment checkout without cvv touching their application. This means that the merchant should be able to receive a CVV and process a payment without exposing their front-end to any PCI data

// step 1
const skyflowClient = skyflow.init({
	 vaultID: <vault_Id>, 
	 vaultURL: <vault_url>, 
	 getBearerToken: <helperFunc>
});

// step 2
const collectContainer = skyflowClient.container(Skyflow.ContainerType.COLLECT)

// step 3
const cardNumberElement = collectContainer.create({           
  type: skyflow.ElementType.CARD_NUMBER
})
cardNumberElement.mount("#cardNumber")

const cvvElement = collectContainer.create({
    type: skyflow.ElementType.CVV
})
cvvElement.mount("#cvv")

// step 4
const gatewayConfig = { 
  gatewayURL: "https://area51.gateway.skyflow.com/v1/gateway/inboundRoutes/abc-1213/v2/pay”,
  methodName: Skyflow.RequestMethod.POST,
  requestBody: {
   card_number: cardNumberElement, //it can be skyflow element(collect or reveal) or actual value
   cvv: cvvElement,  
  }
}

const response =  skyflowClient.invokeGateway(gatewayConfig);

Sample Response:

{
   "receivedTimestamp": "2019-05-29 21:49:56.625",
   "processingTimeinMs": 116
}

In the above example, CVV is being collected from the user input at the time of checkout and not stored anywhere in the vault

Note:

• card_number can be either container element or plain text value (tokens or actual value)
• table and column names are not required for creating collect element, if it is used for invokeGateway method, since they will not be stored in the vault

Sample use-case 2:

Card issuance - customers want to issue cards from card issuer service and should generate the CVV dynamically without increasing their PCI scope.

// step 1
const skyflowClient = skyflow.init({
	 vaultID: <vault_Id>, 
	 vaultURL: <vault_url>, 
	 getBearerToken: <helperFunc>
});

// step 2
const revealContainer = skyflowClient.container(Skyflow.ContainerType.REVEAL)
const collectContainer = skyflowClient.container(Skyflow.ContainerType.COLLECT)

// step 3
const cvvElement = revealContainer.create({
    altText: "###",
})
cvvElement.mount("#cvv")

const expiryDateElement = collectContainer.create({
    type: skyflow.ElementType.EXPIRATION_DATE
})
expiryDateElement.mount("#expirationDate")

//step 4
const gatewayConfig = { 
  gatewayURL: "https://area51.gateway.skyflow.com/v1/gateway/inboundRoutes/abc-1213/cards/{card_number}/cvv2generation",
  methodName: Skyflow.RequestMethod.POST,
  pathParams: {
     card_number: "0905-8672-0773-0628"	//it can be skyflow element(collect/reveal) or token or actual value
  },
  requestBody: {
    expirationDate: expiryDateElement //it can be skyflow element(collect/reveal) or token or actual value
 },
 responseBody: {
     resource: {
         cvv2: cvvElement   // pass the element where the cvv response from the gateway will be mounted
       }
     }  
   }
}

const response = skyflowClient.invokeGateway(gatewayConfig);

Sample Response:

{
   "receivedTimestamp": "2019-05-29 21:49:56.625",
   "processingTimeinMs": 116
}

Note:

• token is optional for creating reveal element, if it is used for invokeGateway
• responseBody contains collect or reveal elements to render the response from the gateway on UI

Changelog

[1.4.0] - 2021-10-26

Added

Detecting card type and displaying icon in the card number element