SessionCrypto class final

The X25519 keypair backing one TON Connect session.

Per the session specification each side generates one keypair per session. The public key, hex-encoded, is the client_id used to address the peer on the HTTP bridge; the secret key never leaves the device.

A session is the pair of two client_id values. Generating a new keypair therefore starts a new session — restoring a persisted connection MUST reuse the stored secret key, which is what SessionCrypto.fromSecretKey is for.

Annotations

• @immutable

Constructors

SessionCrypto()

Generates a fresh session keypair from the platform's secure RNG.

SessionCrypto.fromSecretKey(String secretKeyHex)

Restores a session keypair from a previously persisted secret key.

factory

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

secretKeyHex → String

The 32-byte X25519 secret key as lowercase hex.

no setter

sessionId → String

This session's client_id: the 64-character lowercase hex encoding of the 32-byte X25519 public key.

no setter

Methods

decrypt(String encodedMessage, String senderClientId) → String

Decrypts a base64 nonce ++ ciphertext payload from senderClientId.

encrypt(String message, String receiverClientId) → String

Encrypts message for the peer identified by receiverClientId.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited