blockchain-kit-sdk/com.cramium.blockchain.kit.transport/HwTransport

HwTransport

interface HwTransport : KmpHwTransport

Transport-agnostic hardware transport interface.

Extends KmpHwTransport (UniFFI callback) with session configuration and lifecycle management. Each transport implementation (BLE, USB, etc.) provides its own framing, fragmentation, and connection handling.

The Rust MPC SDK interacts with this via sendToHw/recvFromHw. Protocol classes use the session properties and drainIncomingBuffer for protocol-level coordination.

Properties

abstract val deviceInfo: DeviceInfo

abstract var fromPartyId: String

Party ID for TssMessage encoding.

abstract var groupId: String

MPC group identifier for IDCP/TssMessage encoding.

abstract var partyIndex: UInt

Party index for TssMessage encoding (3 = mobile).

abstract val transportType: TransportType

Functions

abstract fun close()

Release all transport resources.

drainIncomingBuffer

abstract suspend fun drainIncomingBuffer(stabilizationMs: Long = 500, maxWaitMs: Long = 5000): List<ByteArray>

Drain incoming buffer after batch-send operations. Clears stale data from the transport buffer between protocol steps.

abstract fun recvFromHw(expectedType: String): ByteArray

abstract fun sendToHw(msgType: String, payload: ByteArray, partyIndex: UInt, roundIndex: UInt)