Initial Go SDK for Keysat licensing service

Pure-Go, stdlib-only implementation of the LIC1 wire format:
- ParseKey + Verify + ParseAndVerify for offline verification
- HashFingerprint helper (SHA-256, matching the daemon's contract)
- LoadPublicKeyPEM for the standard PKIX-encoded Ed25519 public keys
  the daemon emits
- Client.Validate / Client.PublicKey for online checks against a
  running Keysat daemon
- LicensePayload struct with idiomatic Go getters (IsTrial,
  IsFingerprintBound, IsExpiredAt, HasEntitlement)

Wire-format crosscheck against the shared tests/crosscheck/vector.json
(the same file the Rust, TypeScript, Python SDKs and the daemon itself
test against). All four fixtures pass — v1 legacy fingerprint-bound,
v2 trial with entitlements, v2 perpetual unbound, plus end-to-end
PEM-load → ParseAndVerify signature roundtrip. Confirms byte-for-byte
agreement across five independent implementations.

No third-party dependencies. Module path:
github.com/keysat-xyz/keysat-client-go
go 1.21

This commit is contained in:

Grant

2026-05-08 11:17:46 -05:00

commit 81a621423a

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				module github.com/keysat-xyz/keysat-client-go

				go 1.21