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7/9/2026
The Complete Redbelly EligibilitySDK Integration Guide: Widget to Backend to On-Chain

The Complete Redbelly EligibilitySDK Integration Guide: Widget to Backend to On-Chain

Short summary

This guide walks through integrating Redbelly Network's EligibilitySDK end-to-end: frontend widget, backend verifier, and on-chain permission checks. It clarifies the two distinct verification mechanisms (credential proof vs. on-chain permission read) and provides tested code for React 19 and Next.js 16. The guide also documents three undocumented behaviors and workarounds discovered during real builds.

  • •End-to-end walkthrough of Redbelly EligibilitySDK from widget to on-chain
  • •Distinguishes credential verification flow from on-chain permission reads
  • •Tested against SDK v0.0.31 on React 19 and Next.js 16 with workarounds for gaps

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