*** bdk-0.5.1-undocumented.kt 2022-03-19 10:29:15.000000000 -0400 --- bdk-0.5.1-documented.kt 2022-03-19 10:27:57.000000000 -0400 *************** *** 17,131 **** --- 17,144 ---- // compile the Rust component. The easiest way to ensure this is to bundle the Kotlin // helpers directly inline like we're doing here. import com.sun.jna.Library import com.sun.jna.Native import com.sun.jna.Pointer import com.sun.jna.Structure import com.sun.jna.ptr.ByReference import java.nio.ByteBuffer import java.nio.ByteOrder import java.util.concurrent.atomic.AtomicBoolean import java.util.concurrent.atomic.AtomicLong import java.util.concurrent.locks.ReentrantLock import kotlin.concurrent.withLock // The Rust Buffer and 3 templated methods (alloc, free, reserve). // This is a helper for safely working with byte buffers returned from the Rust code. // A rust-owned buffer is represented by its capacity, its current length, and a // pointer to the underlying data. + + /** + * @suppress + */ @Structure.FieldOrder("capacity", "len", "data") open class RustBuffer : Structure() { @JvmField var capacity: Int = 0 @JvmField var len: Int = 0 @JvmField var data: Pointer? = null class ByValue : RustBuffer(), Structure.ByValue class ByReference : RustBuffer(), Structure.ByReference companion object { internal fun alloc(size: Int = 0) = rustCall() { status -> _UniFFILib.INSTANCE.ffi_bdk_2b7a_rustbuffer_alloc(size, status).also { if(it.data == null) { throw RuntimeException("RustBuffer.alloc() returned null data pointer (size=${size})") } } } internal fun free(buf: RustBuffer.ByValue) = rustCall() { status -> _UniFFILib.INSTANCE.ffi_bdk_2b7a_rustbuffer_free(buf, status) } internal fun reserve(buf: RustBuffer.ByValue, additional: Int) = rustCall() { status -> _UniFFILib.INSTANCE.ffi_bdk_2b7a_rustbuffer_reserve(buf, additional, status) } } @Suppress("TooGenericExceptionThrown") fun asByteBuffer() = this.data?.getByteBuffer(0, this.len.toLong())?.also { it.order(ByteOrder.BIG_ENDIAN) } } /** * The equivalent of the `*mut RustBuffer` type. * Required for callbacks taking in an out pointer. * * Size is the sum of all values in the struct. */ + /** + * @suppress + */ class RustBufferByReference : ByReference(16) { /** * Set the pointed-to `RustBuffer` to the given value. */ fun setValue(value: RustBuffer.ByValue) { // NOTE: The offsets are as they are in the C-like struct. val pointer = getPointer() pointer.setInt(0, value.capacity) pointer.setInt(4, value.len) pointer.setPointer(8, value.data) } } // This is a helper for safely passing byte references into the rust code. // It's not actually used at the moment, because there aren't many things that you // can take a direct pointer to in the JVM, and if we're going to copy something // then we might as well copy it into a `RustBuffer`. But it's here for API // completeness. + /** + * @suppress + */ @Structure.FieldOrder("len", "data") open class ForeignBytes : Structure() { @JvmField var len: Int = 0 @JvmField var data: Pointer? = null class ByValue : ForeignBytes(), Structure.ByValue } // A helper for structured writing of data into a `RustBuffer`. // This is very similar to `java.nio.ByteBuffer` but it knows how to grow // the underlying `RustBuffer` on demand. // // TODO: we should benchmark writing things into a `RustBuffer` versus building // up a bytearray and then copying it across. + /** + * @suppress + */ class RustBufferBuilder() { var rbuf = RustBuffer.ByValue() var bbuf: ByteBuffer? = null init { val rbuf = RustBuffer.alloc(16) // Totally arbitrary initial size rbuf.writeField("len", 0) this.setRustBuffer(rbuf) } internal fun setRustBuffer(rbuf: RustBuffer.ByValue) { this.rbuf = rbuf this.bbuf = this.rbuf.data?.getByteBuffer(0, this.rbuf.capacity.toLong())?.also { it.order(ByteOrder.BIG_ENDIAN) it.position(rbuf.len) } } fun finalize() : RustBuffer.ByValue { val rbuf = this.rbuf *************** *** 266,305 **** --- 279,321 ---- val return_value = callback(status) if (status.isSuccess()) { return return_value } else if (status.isError()) { throw errorHandler.lift(status.error_buf) } else if (status.isPanic()) { // when the rust code sees a panic, it tries to construct a rustbuffer // with the message. but if that code panics, then it just sends back // an empty buffer. if (status.error_buf.len > 0) { throw InternalException(String.lift(status.error_buf)) } else { throw InternalException("Rust panic") } } else { throw InternalException("Unknown rust call status: $status.code") } } // CallStatusErrorHandler implementation for times when we don't expect a CALL_ERROR + /** + * @suppress + */ object NullCallStatusErrorHandler: CallStatusErrorHandler { override fun lift(error_buf: RustBuffer.ByValue): InternalException { RustBuffer.free(error_buf) return InternalException("Unexpected CALL_ERROR") } } // Call a rust function that returns a plain value private inline fun rustCall(callback: (RustCallStatus) -> U): U { return rustCallWithError(NullCallStatusErrorHandler, callback); } // Contains loading, initialization code, // and the FFI Function declarations in a com.sun.jna.Library. @Synchronized private fun findLibraryName(componentName: String): String { val libOverride = System.getProperty("uniffi.component.$componentName.libraryOverride") if (libOverride != null) { return libOverride } *************** *** 406,455 **** --- 422,477 ---- uniffi_out_err: RustCallStatus ): Unit fun ffi_bdk_2b7a_rustbuffer_reserve(buf: RustBuffer.ByValue,additional: Int, uniffi_out_err: RustCallStatus ): RustBuffer.ByValue } // Public interface members begin here. // Interface implemented by anything that can contain an object reference. // // Such types expose a `destroy()` method that must be called to cleanly // dispose of the contained objects. Failure to call this method may result // in memory leaks. // // The easiest way to ensure this method is called is to use the `.use` // helper method to execute a block and destroy the object at the end. + /** + * @suppress + */ interface Disposable { fun destroy() companion object { fun destroy(vararg args: Any?) { args.filterIsInstance() .forEach(Disposable::destroy) } } } + /** + * @suppress + */ inline fun T.use(block: (T) -> R) = try { block(this) } finally { try { // N.B. our implementation is on the nullable type `Disposable?`. this?.destroy() } catch (e: Throwable) { // swallow } } // The base class for all UniFFI Object types. // // This class provides core operations for working with the Rust `Arc` pointer to // the live Rust struct on the other side of the FFI. // // There's some subtlety here, because we have to be careful not to operate on a Rust // struct after it has been dropped, and because we must expose a public API for freeing // the Kotlin wrapper object in lieu of reliable finalizers. The core requirements are: *************** *** 509,548 **** --- 531,573 ---- // Otherwise we atomically decrement and check the counter. // If it has reached zero then we destroy the underlying Rust struct. // // Astute readers may observe that this all sounds very similar to the way that Rust's `Arc` works, // and indeed it is, with the addition of a flag to guard against multiple calls to `destroy`. // // The overall effect is that the underlying Rust struct is destroyed only when `destroy` has been // called *and* all in-flight method calls have completed, avoiding violating any of the expectations // of the underlying Rust code. // // In the future we may be able to replace some of this with automatic finalization logic, such as using // the new "Cleaner" functionaility in Java 9. The above scheme has been designed to work even if `destroy` is // invoked by garbage-collection machinery rather than by calling code (which by the way, it's apparently also // possible for the JVM to finalize an object while there is an in-flight call to one of its methods [1], // so there would still be some complexity here). // // Sigh...all of this for want of a robust finalization mechanism. // // [1] https://stackoverflow.com/questions/24376768/can-java-finalize-an-object-when-it-is-still-in-scope/24380219 // + /** + * @suppress + */ abstract class FFIObject( protected val pointer: Pointer ): Disposable, AutoCloseable { private val wasDestroyed = AtomicBoolean(false) private val callCounter = AtomicLong(1) open protected fun freeRustArcPtr() { // To be overridden in subclasses. } override fun destroy() { // Only allow a single call to this method. // TODO: maybe we should log a warning if called more than once? if (this.wasDestroyed.compareAndSet(false, true)) { // This decrement always matches the initial count of 1 given at creation time. if (this.callCounter.decrementAndGet() == 0L) { this.freeRustArcPtr() } } *************** *** 595,712 **** --- 620,746 ---- } } fun get(handle: Handle) = lock.withLock { leftMap[handle] } fun delete(handle: Handle) { this.remove(handle) } fun remove(handle: Handle): T? = lock.withLock { leftMap.remove(handle)?.let { obj -> rightMap.remove(obj) obj } } } + /** + * @suppress + */ interface ForeignCallback : com.sun.jna.Callback { public fun invoke(handle: Handle, method: Int, args: RustBuffer.ByValue, outBuf: RustBufferByReference): Int } // Magic number for the Rust proxy to call using the same mechanism as every other method, // to free the callback once it's dropped by Rust. internal const val IDX_CALLBACK_FREE = 0 internal abstract class FfiConverterCallbackInterface( protected val foreignCallback: ForeignCallback ) { val handleMap = ConcurrentHandleMap() // Registers the foreign callback with the Rust side. // This method is generated for each callback interface. abstract fun register(lib: _UniFFILib) fun drop(handle: Handle): RustBuffer.ByValue { return handleMap.remove(handle).let { RustBuffer.ByValue() } } fun lift(n: Handle) = handleMap.get(n) fun read(buf: ByteBuffer) = lift(buf.getLong()) fun lower(v: CallbackInterface) = handleMap.insert(v).also { assert(handleMap.get(it) === v) { "Handle map is not returning the object we just placed there. This is a bug in the HandleMap." } } fun write(v: CallbackInterface, buf: RustBufferBuilder) = buf.putLong(lower(v)) } enum class Network { BITCOIN,TESTNET,SIGNET,REGTEST; + /** + * @suppress + */ companion object { internal fun lift(rbuf: RustBuffer.ByValue): Network { return liftFromRustBuffer(rbuf) { buf -> Network.read(buf) } } internal fun read(buf: ByteBuffer) = try { values()[buf.getInt() - 1] } catch (e: IndexOutOfBoundsException) { throw RuntimeException("invalid enum value, something is very wrong!!", e) } } internal fun lower(): RustBuffer.ByValue { return lowerIntoRustBuffer(this, {v, buf -> v.write(buf)}) } internal fun write(buf: RustBufferBuilder) { buf.putInt(this.ordinal + 1) } } sealed class DatabaseConfig { object Memory : DatabaseConfig() data class Sled( val config: SledDbConfiguration ) : DatabaseConfig() data class Sqlite( val config: SqliteDbConfiguration ) : DatabaseConfig() + /** + * @suppress + */ companion object { internal fun lift(rbuf: RustBuffer.ByValue): DatabaseConfig { return liftFromRustBuffer(rbuf) { buf -> DatabaseConfig.read(buf) } } internal fun read(buf: ByteBuffer): DatabaseConfig { return when(buf.getInt()) { 1 -> DatabaseConfig.Memory 2 -> DatabaseConfig.Sled( SledDbConfiguration.read(buf) ) 3 -> DatabaseConfig.Sqlite( SqliteDbConfiguration.read(buf) ) else -> throw RuntimeException("invalid enum value, something is very wrong!!") } } } internal fun lower(): RustBuffer.ByValue { *************** *** 737,776 **** --- 771,813 ---- } sealed class Transaction { data class Unconfirmed( val details: TransactionDetails ) : Transaction() data class Confirmed( val details: TransactionDetails, val confirmation: BlockTime ) : Transaction() + /** + * @suppress + */ companion object { internal fun lift(rbuf: RustBuffer.ByValue): Transaction { return liftFromRustBuffer(rbuf) { buf -> Transaction.read(buf) } } internal fun read(buf: ByteBuffer): Transaction { return when(buf.getInt()) { 1 -> Transaction.Unconfirmed( TransactionDetails.read(buf) ) 2 -> Transaction.Confirmed( TransactionDetails.read(buf), BlockTime.read(buf) ) else -> throw RuntimeException("invalid enum value, something is very wrong!!") } } } internal fun lower(): RustBuffer.ByValue { *************** *** 786,836 **** --- 823,879 ---- } is Transaction.Confirmed -> { buf.putInt(2) this.details.write(buf) this.confirmation.write(buf) } }.let { /* this makes the `when` an expression, which ensures it is exhaustive */ } } } + /** + * Sealed class that can be of either blockchain configuration defined by the library. + */ sealed class BlockchainConfig { data class Electrum( val config: ElectrumConfig ) : BlockchainConfig() data class Esplora( val config: EsploraConfig ) : BlockchainConfig() + /** + * @suppress + */ companion object { internal fun lift(rbuf: RustBuffer.ByValue): BlockchainConfig { return liftFromRustBuffer(rbuf) { buf -> BlockchainConfig.read(buf) } } internal fun read(buf: ByteBuffer): BlockchainConfig { return when(buf.getInt()) { 1 -> BlockchainConfig.Electrum( ElectrumConfig.read(buf) ) 2 -> BlockchainConfig.Esplora( EsploraConfig.read(buf) ) else -> throw RuntimeException("invalid enum value, something is very wrong!!") } } } internal fun lower(): RustBuffer.ByValue { return lowerIntoRustBuffer(this, {v, buf -> v.write(buf)}) *************** *** 845,884 **** --- 888,930 ---- } is BlockchainConfig.Esplora -> { buf.putInt(2) this.config.write(buf) } }.let { /* this makes the `when` an expression, which ensures it is exhaustive */ } } } enum class WordCount { WORDS12,WORDS15,WORDS18,WORDS21,WORDS24; + /** + * @suppress + */ companion object { internal fun lift(rbuf: RustBuffer.ByValue): WordCount { return liftFromRustBuffer(rbuf) { buf -> WordCount.read(buf) } } internal fun read(buf: ByteBuffer) = try { values()[buf.getInt() - 1] } catch (e: IndexOutOfBoundsException) { throw RuntimeException("invalid enum value, something is very wrong!!", e) } } internal fun lower(): RustBuffer.ByValue { return lowerIntoRustBuffer(this, {v, buf -> v.write(buf)}) } internal fun write(buf: RustBufferBuilder) { buf.putInt(this.ordinal + 1) } } *************** *** 1084,1123 **** --- 1130,1172 ---- internal fun lower(): Pointer = callWithPointer { it } internal fun write(buf: RustBufferBuilder) { // The Rust code always expects pointers written as 8 bytes, // and will fail to compile if they don't fit. buf.putLong(Pointer.nativeValue(this.lower())) } override fun serialize(): String = callWithPointer { rustCall() { status -> _UniFFILib.INSTANCE.bdk_2b7a_PartiallySignedBitcoinTransaction_serialize(it, status) } }.let { String.lift(it) } + /** + * @suppress + */ companion object { internal fun lift(ptr: Pointer): PartiallySignedBitcoinTransaction { return PartiallySignedBitcoinTransaction(ptr) } internal fun read(buf: ByteBuffer): PartiallySignedBitcoinTransaction { // The Rust code always writes pointers as 8 bytes, and will // fail to compile if they don't fit. return PartiallySignedBitcoinTransaction.lift(Pointer(buf.getLong())) } fun deserialize(psbtBase64: String ): PartiallySignedBitcoinTransaction = PartiallySignedBitcoinTransaction( rustCallWithError(BdkException) { status -> _UniFFILib.INSTANCE.bdk_2b7a_PartiallySignedBitcoinTransaction_deserialize(psbtBase64.lower() ,status) }) } } *************** *** 1204,1282 **** --- 1253,1349 ---- internal fun lower(): RustBuffer.ByValue { return lowerIntoRustBuffer(this, {v, buf -> v.write(buf)}) } internal fun write(buf: RustBufferBuilder) { writeOptionalULong(this.fees, buf) this.received.write(buf) this.sent.write(buf) this.txid.write(buf) } } + /** + * Block height and timestamp of a block + */ data class BlockTime ( var height: UInt, var timestamp: ULong ) { + /** + * @suppress + */ companion object { internal fun lift(rbuf: RustBuffer.ByValue): BlockTime { return liftFromRustBuffer(rbuf) { buf -> BlockTime.read(buf) } } internal fun read(buf: ByteBuffer): BlockTime { return BlockTime( UInt.read(buf), ULong.read(buf) ) } } internal fun lower(): RustBuffer.ByValue { return lowerIntoRustBuffer(this, {v, buf -> v.write(buf)}) } internal fun write(buf: RustBufferBuilder) { this.height.write(buf) this.timestamp.write(buf) } } + /** + * Configuration for an ElectrumBlockchain + * + * @property url URL of the Electrum server (such as ElectrumX, Esplora, BWT). May start with `ssl://` or `tcp://` and include a port, `e.g. ssl://electrum.blockstream.info:60002` + * @property socks5 URL of the socks5 proxy server or a Tor service + * @property retry Request retry count + * @property timeout Request timeout in seconds + * @property stopGap Stop searching addresses for transactions after finding an unused gap of this length + */ data class ElectrumConfig ( var url: String, var socks5: String?, var retry: UByte, var timeout: UByte?, var stopGap: ULong ) { + /** + * @suppress + */ companion object { internal fun lift(rbuf: RustBuffer.ByValue): ElectrumConfig { return liftFromRustBuffer(rbuf) { buf -> ElectrumConfig.read(buf) } } internal fun read(buf: ByteBuffer): ElectrumConfig { return ElectrumConfig( String.read(buf), readOptionalString(buf), UByte.read(buf), readOptionalUByte(buf), ULong.read(buf) ) } } internal fun lower(): RustBuffer.ByValue { return lowerIntoRustBuffer(this, {v, buf -> v.write(buf)}) } *************** *** 1287,1326 **** --- 1354,1396 ---- this.retry.write(buf) writeOptionalUByte(this.timeout, buf) this.stopGap.write(buf) } } data class EsploraConfig ( var baseUrl: String, var proxy: String?, var timeoutRead: ULong, var timeoutWrite: ULong, var stopGap: ULong ) { + /** + * @suppress + */ companion object { internal fun lift(rbuf: RustBuffer.ByValue): EsploraConfig { return liftFromRustBuffer(rbuf) { buf -> EsploraConfig.read(buf) } } internal fun read(buf: ByteBuffer): EsploraConfig { return EsploraConfig( String.read(buf), readOptionalString(buf), ULong.read(buf), ULong.read(buf), ULong.read(buf) ) } } internal fun lower(): RustBuffer.ByValue { return lowerIntoRustBuffer(this, {v, buf -> v.write(buf)}) } *************** *** 1329,1368 **** --- 1399,1441 ---- writeOptionalString(this.proxy, buf) this.timeoutRead.write(buf) this.timeoutWrite.write(buf) this.stopGap.write(buf) } } data class ExtendedKeyInfo ( var mnemonic: String, var xprv: String, var fingerprint: String ) { + /** + * @suppress + */ companion object { internal fun lift(rbuf: RustBuffer.ByValue): ExtendedKeyInfo { return liftFromRustBuffer(rbuf) { buf -> ExtendedKeyInfo.read(buf) } } internal fun read(buf: ByteBuffer): ExtendedKeyInfo { return ExtendedKeyInfo( String.read(buf), String.read(buf), String.read(buf) ) } } internal fun lower(): RustBuffer.ByValue { return lowerIntoRustBuffer(this, {v, buf -> v.write(buf)}) } internal fun write(buf: RustBufferBuilder) { this.mnemonic.write(buf)