VP verification fails: Overall Verification Result is false

• Detected on: 2025-09-03 16:01 local time
• Module: vp.Verify
• Affected version: current main (see build.gradle.kts version WALTID 0.13.0, Gradle 8.6)

Summary

Running the Verifiable Presentation verification example prints Overall Verification Result: false. A dedicated JUnit 5 test has been added that documents this failure and currently fails.

Failing test

• File: src/test/kotlin/vp/VerifyVpTest.kt
• Test: verifiable presentation should verify successfully
• Current result: Fails with assertion Expected verifyVP() to result in overall success, but it currently fails.

Overall Verification Result: false
Expected verifyVP() to result in overall success, but it currently fails. Output: Success(kotlin.Unit)

Steps to reproduce

1. Clone repo and build dependencies:

   ./gradlew build

2. Run the VP verification example directly:

   ./gradlew run -PmainClass=vp.VerifyKt

   Observe the log line: Overall Verification Result: false.
3. Run the failing test:

   ./gradlew test --tests vp.VerifyVpTest

   The test fails, confirming the issue.

Expected behavior

• VP verification for the included sample should pass, resulting in Overall Verification Result: true and the test should pass.

Actual behavior

• Overall Verification Result: false and the test fails.

Environment

• Gradle: 8.6
• Java/Kotlin: Kotlin JVM plugin 2.1.20; Java 11+
• Dependencies (walt.id): 0.13.0
• OS: (CI-dependent / local)

Notes / Suspicions

• The policies configured in vp/Verify.kt may not align with the signed VP and embedded VC(s). For instance:
  • AllowedIssuerPolicy is set to a specific issuerDid which may not match the VC issuer.
  • HolderBindingPolicy requires matching holder DID; mismatch would fail.
  • ExpirationDatePolicy is configured for type mapping; sample data may already be expired.
• The example prints success/failure but does not expose the result to callers; for easier testing, consider returning the result or exposing a helper that returns overallSuccess().

Proposed next steps

• Verify and align the issuerDid, holderDid, and the embedded credential’s issuer.
• Check the sample VP/VC dates for nbf, exp, and ensure they are valid.
• Optionally, update verifyVP() to return the boolean so tests can assert directly instead of relying on logs.

/cc maintainers