KDPika Licensing
Sign inStart freeChoose by actual runtime and trust behavior, not an unverified universal-parity claim.
What you will learn
- Compare all four official SDKs with ten REST projects.
- Understand native OS, cache, feature and vault boundaries.
- Plan a controlled source/dependency upgrade.
Prerequisites
- Complete the Sandbox quickstart.
- Read signed responses, authentication and offline mode.
Current source versions
| Language | Observed version | Declared target | Actual requirement / boundary | Application surface |
|---|---|---|---|---|
| python | 1.1.5 | >=3.11,<3.15 | Python 3.11–3.14 | PyPI package; import kdpika_licensing |
| php | 1.0.0 | ^8.1 | PHP8.2+ (readonly result class) | Composer PSR-4 backend library |
| javascript | 1.0.0 | >=18 | Node18+; test each deployed runtime | module; Node/Electron main process only |
| csharp | 1.0.0 | net7.0 | .NET7+ compatible target; prefer maintained runtime | C# project reference; async client |
Version1.0.0 identifies the observed source package; PHP uses the existing versioned download label, not a Composer version field. Python 1.1.5 is now published on PyPI with GitHub source; other packages remain source downloads. No support-duration SLA is implied. Source ZIP SHA-256 values on the overview are the package integrity source.
Actual runtime verification
All four official source packages have clean local installs and current package test entries. Python, PHP, Node and C# execute genuine isolated Sandbox lifecycle programs. The current package test suite includes a new PHP package-local entry with the same assertions; the unchanged legacy repository entry still assumes repository-root vendor/autoload.php.
The ten REST projects compile/execute using pinned development dependencies, build from fresh exact ZIP extractions and run actual Sandbox checks. TypeScript uses Node22 for this complete example; that is not a change to the official Node SDK minimum. Go has no external runtime module. C/C++ use an explicit POSIX core; Swift here is macOS/CryptoKit, not a claimed universal target.
Operating systems and UI
The available native host is macOS. Portable runtimes can target other supported systems, but Windows/Linux/mobile execution is not inferred from a macOS build. WPF requires Windows: its full project cross-builds with Windows targeting and its shared controller executes on the local Sandbox, but its native UI is not executed on macOS.
Electron source and unsigned macOS packaged-app runs are separate verified cases. Python CLI also runs as a frozen PyInstaller macOS build. Code signing, notarization, Windows/Linux packaging, assistive-technology certification and real OS-vault backends remain separate deployment responsibilities.
Storage and feature semantics
Python can prefer an available positive-priority keyring, with permission-protected file fallback. PHP, Node and C# do not automatically provide Keychain/DPAPI/Secret Service adapters. See the tested storage guidance before claiming encrypted-vault protection.
Every feature helper must follow a valid/signature gate. Helpers differ in truthiness/fallback semantics, especially C# nonboolean values; numeric quotas require explicit type/range checks. A successful deactivation has valid=true for the release operation but no entitlement grant. activated/token presence is not current license validity.
Known compatibility gaps
| Current source | Observed issue | Safe application response |
|---|---|---|
| Legacy Python 1.0.0 | Separator/exponent canonicalization defects | Upgrade to Python SDK 1.1.5; retain all signature and binding checks |
| JavaScript official SDK | Integral-float spelling such as19.0 can be lost | Deny invalid signature; the REST TypeScript example uses the separate lossless P5 verifier |
| C# | Cached Unicode serialization can invalidate a real signed state | Online recovery may work; genuine offline cache failure is not falsely reported as success |
| PHP | ^8.1 metadata conflicts with readonly class requiring8.2; PHP8.5 curl_close notice | Use the actual source runtime and handle deprecation separately; never suppress licensing validation |
| Legacy/source SDKs | Feature helpers alone may not enforce result validity | Gate valid and signature status before feature use |
| Signing keys | No historical key ring/overlap promise supplied | Pin trust deliberately and coordinate updates |
These are documented source defects/limits, not approvals to modify SDK behavior. Runtime implementations, APIs and protected product files stay unchanged by this documentation release.
Compatibility policy
API v1 is independent of SDK package versions. Pin exact source/dependency locks and test current response/cache/clock/refusal behavior before updating. A file named1.0.0 does not establish support for every historical release. Additional fields should not be stripped from signed payloads; signature canonicalization must include the complete signed payload.
Treat constructor/API changes, namespace/identity changes, signed-byte behavior, token format and offline-time rules as compatibility-sensitive. No minimum deprecation notice, support window or automatic old-key overlap is promised where the actual product does not implement one.
Choose and verify your target
- Match the actual runtime and application surface in the table. Expected: a library/client suitable for your trusted process.
- Download and verify the exact source archive. Expected: SHA-256 matches the overview.
- Follow the complete guide in a clean application project. Expected: pinned dependency restore/build and matching API surface.
- Run real signed activation, cache reload, offline/refusal and release. Expected: explicit accepted decisions or safe refusals, not assumptions from successful import.
- Repeat after packaging on your actual target OS. Expected: native proof for your distribution, without claiming other targets were executed.
Expected result
Your integration authenticates signed state and handles failures without granting features. Installation identity, source version and test boundaries remain explicit.
Common mistakes
- Assuming a declared runtime minimum proves native execution on every OS.
- Treating all feature helper fallbacks as identical.
Security notes
Keep developer keys on trusted backends, pin independent key trust, preserve HTTPS/signature verification and never equate token presence with permission. Local machine owners can patch software; a successful build or checksum is not an anti-tamper certification.
Troubleshooting
| Symptom | Cause | Action |
|---|---|---|
| PHP8.1 parse failure | Actual readonly class requires8.2 | Use the actual supported source runtime |
| C# offline fails after restart | Known Unicode cache byte mismatch | Fail closed and reconnect; do not strip signed fields |
| Unknown package registry release | No public registry publication established | Install the exact source ZIP and verify its checksum |
Next steps
Review the SDK downloads, test vectors and API errors for the exact selected client.