Rename bdk-kotlin companion project, fix gradle warnings

bdk-kotlin/jar/build.gradle

@@ -0,0 +1,42 @@
+plugins {
+    id 'org.jetbrains.kotlin.jvm'
+    id 'java-library'
+    id 'maven-publish'
+}
+
+test {
+    environment "LD_LIBRARY_PATH", file("${projectDir}/../../target/debug").absolutePath
+//    testLogging {
+//        events "PASSED", "SKIPPED", "FAILED", "STANDARD_OUT", "STANDARD_ERROR"
+//    }
+}
+
+task buildRust(type: Exec) {
+    workingDir '../'
+    commandLine './build.sh'
+}
+
+dependencies {
+    implementation platform('org.jetbrains.kotlin:kotlin-bom')
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "net.java.dev.jna:jna:5.8.0"
+    
+    testImplementation 'org.jetbrains.kotlin:kotlin-test'
+    testImplementation 'org.jetbrains.kotlin:kotlin-test-junit'
+}
+
+publishing {
+    publications {
+        maven(MavenPublication) {
+            groupId = 'org.bitcoindevkit'
+            artifactId = 'bdk-debug'
+            version = '0.0.1-dev'
+
+            from components.java
+        }
+    }
+}
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}

bdk-kotlin/jar/src/main/java/org/bitcoindevkit/bdk/Lib.kt

@@ -0,0 +1,35 @@
+package org.bitcoindevkit.bdk
+
+import com.sun.jna.*
+
+interface Lib : Library {
+
+    // typedef struct WalletPtr WalletPtr_t;
+    class WalletPtr_t : PointerType {
+        constructor(): super()
+        constructor(pointer: Pointer): super(pointer)
+    }
+
+    // void free_string (
+    //    char * string);
+    fun free_string(string: String)
+
+    // WalletPtr_t * new_wallet (
+    //    char const * name,
+    //    char const * descriptor,
+    //    char const * change_descriptor);
+    fun new_wallet(name: String, descriptor: String, changeDescriptor: String?): WalletPtr_t
+
+    // void sync_wallet (
+    //    WalletPtr_t * const * wallet);
+    //fun sync_wallet(wallet: WalletPtr_t) 
+    fun sync_wallet(wallet: WalletPtr_t)
+
+    // char * new_address (
+    //    WalletPtr_t * const * wallet);
+    fun new_address(wallet: WalletPtr_t): String
+
+    // void free_wallet (
+    //    WalletPtr_t * wallet);
+    fun free_wallet(wallet: WalletPtr_t)
+}

bdk-kotlin/jar/src/test/java/org/bitcoindevkit/bdk/LibTest.kt

@@ -0,0 +1,39 @@
+package org.bitcoindevkit.bdk
+
+import com.sun.jna.Native
+import org.junit.Test
+import kotlin.test.assertEquals
+
+/**
+ * Library test, which will execute on linux host.
+ *
+ */
+class LibTest {
+
+    private val bdkFfi: Lib = Native.load("bdk_ffi", Lib::class.java)
+
+    @Test
+    fun new_sync_free_wallet() {
+        val name = "test_wallet"
+        val desc = "wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/0/*)"
+        val change = "wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/1/*)"
+
+        val wallet = bdkFfi.new_wallet(name, desc, change)
+        bdkFfi.sync_wallet(wallet)
+        bdkFfi.free_wallet(wallet)
+    }
+
+    @Test
+    fun new_newaddress_wallet() {
+        val name = "test_wallet"
+        val desc = "wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/0/*)"
+        val change = "wpkh([c258d2e4/84h/1h/0h]tpubDDYkZojQFQjht8Tm4jsS3iuEmKjTiEGjG6KnuFNKKJb5A6ZUCUZKdvLdSDWofKi4ToRCwb9poe1XdqfUnP4jaJjCB2Zwv11ZLgSbnZSNecE/1/*)"
+
+        val wallet = bdkFfi.new_wallet(name, desc, change)
+        val address = bdkFfi.new_address(wallet)
+        //println("address created from kotlin: $address")
+        assertEquals(address, "tb1qzg4mckdh50nwdm9hkzq06528rsu73hjxxzem3e")
+        bdkFfi.free_string(address)
+        bdkFfi.free_wallet(wallet)
+    }
+}