Initial public commit

Cargo.toml

@@ -0,0 +1,41 @@
+[package]
+name = "licensing-client"
+version = "0.1.0"
+edition = "2021"
+rust-version = "1.75"
+description = "Client library for Keysat. Verifies signed license keys offline and wraps the HTTP API for purchase and revocation checks."
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/keysat-xyz/keysat"
+keywords = ["bitcoin", "licensing", "btcpay", "start9"]
+categories = ["authentication", "cryptography"]
+
+[features]
+# Default is offline-only verification — no network, no async runtime required.
+default = ["offline"]
+offline = []
+# Online verification + purchase via reqwest. Async (tokio).
+online = ["reqwest", "tokio", "url"]
+
+[dependencies]
+ed25519-dalek = { version = "2", features = ["pkcs8", "pem"] }
+sha2 = "0.10"
+data-encoding = "2"
+thiserror = "1"
+
+# Async / HTTP: only compiled with the `online` feature.
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"], optional = true }
+tokio = { version = "1", features = ["rt", "macros"], optional = true }
+url = { version = "2", optional = true }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+[dev-dependencies]
+tokio = { version = "1", features = ["full"] }
+
+[[example]]
+name = "offline_verify"
+required-features = ["offline"]
+
+[[example]]
+name = "online_validate"
+required-features = ["online"]