pilot

Loading the JavaScript Library {#uctp-load-js-library}
======================================================

Use the clientLibrary asset path and clientLibraryIntegrity value that is returned by the capture context response to invoke `Unified Click to Pay`.  
You must retrieve these values from the clientLibrary and clientLibraryIntegrity fields that are returned in the JWT from `https://apitest.cybersource.com``/uctp/v1/sessions`:

```
"data": {
    "clientLibrary": "[EXTRACT clientLibrary VALUE from here]",
    "clientLibraryIntegrity": "[EXTRACT clientLibraryIntegrity VALUE from here]"
  }
```

You can use these values to create your script tags:

```
<script src="[INSERT clientLibrary VALUE HERE]"
integrity=”[INSERT clientLibraryIntegrity VALUE
HERE]” crossorigin=”anonymous”></script>
<script>
var vsdk = window.VSDK
</script>
```

You must perform this process for each transaction, as these values are unique for each transaction. You must avoid hard-coding values for the clientLibrary and clientLibraryIntegrity fields to prevent client-side errors.

> IMPORTANT
> Use the clientLibrary and clientLibraryIntegrity parameter values in the capture context response to obtain the ` Unified Click to Pay ` JavaScript library URL and the integrity value. This ensures that you are always using the most up-to-date library and protects against fraud. Do not hard-code the ` Unified Click to Pay ` JavaScript library URL or integrity value.  
> When you load the library, the capture context from your initial server-side request is used to invoke the accept function.