Sample
org.apache.commons/commons-lang3 3.17.0: org.apache.commons.lang3.StringUtils.isBlank
Verified sample for maven org.apache.commons/commons-lang3 3.17.0: org.apache.commons.lang3.StringUtils.isBlank. The contract ran on java 21 · linux 2023/x64…
sha256:917133697c397168d33a5a70f012e47ffc205dcd8eb97051af7fe6bd15951e7f
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 1
Declared environment
java 21 linux 2023 · glibc x64 java 21 java 21 maven 3
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| java 21 · linux 2023/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:PASS · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · maven-java@1 |
2026-08-19 |
| java 25 · linux 2023/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:PASS · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · maven-java@1 |
2026-08-19 |
Case
HOW- Goal
- verify org.apache.commons.lang3.StringUtils.isBlank in pkg:maven/org.apache.commons/commons-lang3@3.17.0
- Symbols
-
- org.apache.commons.lang3.StringUtils.isBlank
- Environment
- java 21
- Created
- 2026-08-18T13:04:51Z
Contract
- StringUtils.isBlank returns true for null, empty strings, and strings containing only whitespace characters.
- StringUtils.isBlank returns false for strings containing any non-whitespace characters.
- StringUtils.isEmpty returns false for whitespace strings where StringUtils.isBlank returns true.
- StringUtils.isNotBlank returns true for non-empty non-whitespace strings and false for null or blank strings.
Files
- PROMPT.md
- csx.json
- pom.xml
- spec.json
- src/Contract.java
Origin Seeder
anonymous