PSKT (Portable Signing Sessions)
Welcome to the HardKAS PSKT documentation.
No PSKT adapter implements an operation in this build: hardkas pskt export, import, sign, merge, finalize and extract refuse with a typed error, and hardkas pskt capabilities reports every operation as unavailable. hardkas pskt inspect shows a session file's metadata only: it does not decode the payload, so it shows no inputs, outputs, amounts or recipients and is no pre-signing check. These pages describe the upstream protocol, not something this build runs.
PSKT (Partially Signed Kaspa Transactions) is the upstream Kaspa protocol for coordinating distributed cryptographic authority.
- What is PSKT?: Understand the difference between PSKT (a transport container) and Multisig (a spending condition).
- The Lifecycle: Map the exact boundaries between Partial Signatures, Combination, Finalization, and Extraction.
- Security & Privacy: Learn why PSKTs are not perfectly secret and why signers must trust their inspection tools.
Upstream vs HardKAS Evidence
HardKAS would wrap the upstream implementation through an adapter; this build has none that works.
| Capability | Upstream Kaspa Primitive | HardKAS Command | Status in this build |
|---|---|---|---|
| Inspect | psktInspect | hardkas pskt inspect | session metadata only (the payload is not decoded) |
| Sign | psktSign | hardkas pskt sign | UNAVAILABLE (refuses) |
| Combine | psktCombine | hardkas pskt merge | UNAVAILABLE (refuses) |
| Finalize | psktFinalize | hardkas pskt finalize | UNAVAILABLE (refuses) |
| Extract | psktExtract | hardkas pskt extract | UNAVAILABLE (refuses) |
PSKT vs Normal Signing
| Concept | Normal Local Signing | PSKT |
|---|---|---|
| Authority | Available locally and synchronously. | Deferred, offline, or distributed. |
| Network | HardKAS requires node RPC to plan & submit. | Signer requires zero network access. |
| Output | Raw SignedTxArtifact ready for broadcast. | Intermediate binary envelope requiring extraction. |
To see the workflows in action, review the Create & Inspect and Offline Signing guides.