SDK versions

Staying current with SDK versions helps developers take advantage of the latest capabilities and enhancements offered.

URL	Version	Integrity	Changes
https://cdn.firstoken.co/captures/js/2.3/sdk.js	v2.3	sha256-D0P+mQ7N6E0tbReEGYNTjoGqRmWUX87oCLd8PNvs5vg=	Content encryption, JWT authentication, enhanced security. 100% Backward Compatible
https://cdn.firstoken.co/captures/js/2.2/sdk.js	v2.2	sha256-IzmJZo/gWd+To2rEV/ZC9+fXZZgHfw5E0jZECyq9ipY=	Added support for Google Fonts ('Lato', 'Montserrat', 'Open Sans', 'Oswald', 'Poppins', 'Roboto', 'Raleway', 'Slabo 13px', 'Slabo 27px', 'PT Sans', 'Inter') in the font-family CSS
https://cdn.firstoken.co/captures/js/2.1/sdk.js	v2.1	sha256-FbadlNL2dab5uMHBUpFv+jEKsUSg3Cmi0dYvVWQIuZs=	Added support for tags parameter in the initialization function.
https://cdn.firstoken.co/captures/js/2.0/sdk.js	v2.0	sha256-qtSTst/JgM5bN+4ZILzXN/DEgAhg2jDYgH5pF9YqeNY=	Added separate date validation events.
https://cdn.firstoken.co/captures/js/1.0/sdk.js	v1.0	sha256-5VzwvLiVo4k8snm84TZShTmTWzXBbCM8NyNMXdkx8fw=	Original version

Implementation Recommendations

For New Implementations

Use SDK 2.3 with these options:

Standard Security (Quick Start)

<script src="https://cdn.firstoken.co/captures/js/2.3/sdk.js"></script>
<script>
const FT = window.FTCaptures.init("your-route-id", "production", callback);
</script>

Enhanced Security (Recommended)

<script src="https://cdn.firstoken.co/captures/js/2.3/sdk.js"></script>
<script>
const FT = window.FTCaptures.init("your-route-id", "production", callback, tags, jwtToken);
</script>

Integrity Verification

Always use integrity hashes in production:

<script 
    src="https://cdn.firstoken.co/captures/js/2.3/sdk.js"
    integrity="sha256-D0P+mQ7N6E0tbReEGYNTjoGqRmWUX87oCLd8PNvs5vg="
    crossorigin="anonymous">
</script>

Version Migration Guides

Migrating from 2.2 to 2.3

1. Update CDN URL

   <!-- Before -->
   <script src="https://cdn.firstoken.co/captures/js/2.2/sdk.js"></script>
   
   <!-- After -->
   <script src="https://cdn.firstoken.co/captures/js/2.3/sdk.js"></script>

2. Test functionality - All existing features continue to work

3. Optional: Implement JWT for enhanced security

4. Optional: If you need to encrypt the payload you sent to us, please contact the support team to configure this feature in the inbound route you are using.

Resources

• Full Example Guide - Detailed implementation help

• Migration & Compatibility - Upgrade assistance

• JWT Authentication Guide - Security enhancement