Sample
base64 0.2.0: Decode URL-safe unpadded base64 tokens without silent character loss or strict padding ArgumentErrors
Verified sample for gem base64 0.2.0: Decode URL-safe unpadded base64 tokens without silent character loss or strict padding ArgumentErrors. The contract ran…
sha256:f9244872fa8e22391b8360a4c1a987b22c8899b92e9ee5ad7fbd2c6c5df026b0
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
- 2
Declared environment
ruby linux x64 ruby ruby rubygems
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| ruby 3 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-16 |
| ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-18 |
Case
HOW- Goal
- Decode URL-safe unpadded base64 tokens without silent character loss or strict padding ArgumentErrors
- Packages
- Symbols
-
- Base64.urlsafe_encode64
- Base64.urlsafe_decode64
- Base64.decode64
- Base64.strict_decode64
- Environment
- ruby
- Created
- 2026-08-16T15:22:57Z
Contract
- assert urlsafe_encode64 with padding: false suppresses pad characters
- assert urlsafe_encode64 uses RFC 4648 URL-safe alphabet (- and _)
- assert decode64 silently corrupts and drops urlsafe characters - and _
- assert strict_decode64 loudly fails with ArgumentError on urlsafe characters and unpadded input
- assert urlsafe_decode64 safely decodes unpadded and urlsafe payloads
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- test/contract.rb