Release 0.6.0 (#30)

* Upgrade to kotlin 1.5.31

* Upgrade dokka gradle plugins to 1.5.30

.github/workflows/release.yml

@@ -28,6 +28,35 @@ jobs:
           path: ~/.gradle
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
           restore-keys: ${{ runner.os }}-gradle-
+      - name: Android environment
+        shell: bash
+        run: |
+          echo "ANDROID_HOME=$ANDROID_HOME" >> $GITHUB_ENV
+          echo "ANDROID_NDK_VERSION=21.4.7075529" >> $GITHUB_ENV
+      - name: Cached Android NDK
+        uses: actions/cache@v2
+        with:
+          path: ${{ format('{0}/ndk/{1}', env.ANDROID_HOME, env.ANDROID_NDK_VERSION) }}
+          key: ${{ runner.os }}-android-ndk-${{ env.ANDROID_NDK_VERSION }}
+      - name: Set up shell
+        if: matrix.os == 'windows-latest'
+        run: |
+          echo "C:\msys64\usr\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          rm.exe "C:/WINDOWS/system32/bash.EXE"
+      - name: Set up JDK 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 8
+      - name: Setup Android
+        if: matrix.os != 'windows-latest'
+        shell: bash
+        run: |
+          $ANDROID_HOME/tools/bin/sdkmanager "ndk;$ANDROID_NDK_VERSION"
+      - name: Setup Android
+        if: matrix.os == 'windows-latest'
+        shell: bash
+        run: |
+          $ANDROID_HOME\\tools\\bin\\sdkmanager.bat "ndk;$ANDROID_NDK_VERSION"
       - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
@@ -35,11 +64,6 @@ jobs:
       - name: Install Automake
         if: matrix.os == 'macOS-latest'
         run: brew install automake
-      - name: Set up shell
-        if: matrix.os == 'windows-latest'
-        run: |
-          echo ::add-path::C:\msys64\usr\bin\
-          rm.exe "C:/WINDOWS/system32/bash.EXE"
       - name: Check JVM
         shell: bash
         run: ./gradlew jvmTest
@@ -55,8 +79,10 @@ jobs:
         if: matrix.os == 'macOS-latest'
         uses: reactivecircus/android-emulator-runner@v2
         with:
-          api-level: 29
+          api-level: 27
-          ndk: 21.3.6528147
+          emulator-build: 7425822  # workaround to emulator bug: https://github.com/ReactiveCircus/android-emulator-runner/issues/160
+          emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
+          ndk: ${{ env.ANDROID_NDK_VERSION }}
           cmake: 3.10.2.4988404
           script: ./gradlew connectedCheck
       - name: Publish Linux
@@ -65,24 +91,38 @@ jobs:
           BINTRAY_USER: ${{ secrets.bintray_user }}
           BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
         shell: bash
-        run: ./gradlew publishLinuxPublicationToBintrayRepository :jni:jvm:linux:publishJvmPublicationToBintrayRepository
+#          ./gradlew publishLinuxPublicationToBintrayRepository :jni:jvm:linux:publishJvmPublicationToBintrayRepository
+        run: ./gradlew publishLinuxPublicationToMavenLocal :jni:jvm:linux:publishJvmPublicationToMavenLocal
       - name: Publish Windows
         if: matrix.os == 'windows-latest'
         env:
           BINTRAY_USER: ${{ secrets.bintray_user }}
           BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
         shell: bash
-        run: ./gradlew :jni:jvm:mingw:publishJvmPublicationToBintrayRepository
+#          ./gradlew :jni:jvm:mingw:publishJvmPublicationToBintrayRepository
+        run: ./gradlew :jni:jvm:mingw:publishToMavenLocal
       - name: Publish MacOS
         if: matrix.os == 'macOS-latest'
         env:
           BINTRAY_USER: ${{ secrets.bintray_user }}
           BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
         shell: bash
-        run: ./gradlew publish
+#          ./gradlew publish
-      - name: Discard
+        run: ./gradlew publishToMavenLocal
-        if: ${{ failure() || cancelled() }}
+      - name: Copy artifact files
-        env:
+        run: |
-          BINTRAY_USER: ${{ secrets.bintray_user }}
+          mkdir -p maven-local/release
-          BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
+          cp -r ~/.m2/repository/* maven-local/release
-        run: ./gradlew postBintrayDiscard
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: release
+          path: |
+            maven-local
+            !maven-local/**/maven-metadata-local.xml
+#      - name: Discard
+#        if: ${{ failure() || cancelled() }}
+#        env:
+#          BINTRAY_USER: ${{ secrets.bintray_user }}
+#          BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
+#        run: ./gradlew postBintrayDiscard

.github/workflows/snapshot.yml

@@ -3,6 +3,7 @@ name: Publish snapshot
 on:
   push:
     branches:
+      - 'master'
       - 'snapshot/*'
     paths-ignore:
       - '**.md'
@@ -36,6 +37,35 @@ jobs:
           path: ~/.gradle
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
           restore-keys: ${{ runner.os }}-gradle-
+      - name: Android environment
+        shell: bash
+        run: |
+          echo "ANDROID_HOME=$ANDROID_HOME" >> $GITHUB_ENV
+          echo "ANDROID_NDK_VERSION=21.4.7075529" >> $GITHUB_ENV
+      - name: Cached Android NDK
+        uses: actions/cache@v2
+        with:
+          path: ${{ format('{0}/ndk/{1}', env.ANDROID_HOME, env.ANDROID_NDK_VERSION) }}
+          key: ${{ runner.os }}-android-ndk-${{ env.ANDROID_NDK_VERSION }}
+      - name: Set up shell
+        if: matrix.os == 'windows-latest'
+        run: |
+          echo "C:\msys64\usr\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          rm.exe "C:/WINDOWS/system32/bash.EXE"
+      - name: Set up JDK 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 8
+      - name: Setup Android
+        if: matrix.os != 'windows-latest'
+        shell: bash
+        run: |
+          $ANDROID_HOME/tools/bin/sdkmanager "ndk;$ANDROID_NDK_VERSION"
+      - name: Setup Android
+        if: matrix.os == 'windows-latest'
+        shell: bash
+        run: |
+          $ANDROID_HOME\\tools\\bin\\sdkmanager.bat "ndk;$ANDROID_NDK_VERSION"
       - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
@@ -43,11 +73,6 @@ jobs:
       - name: Install Automake
         if: matrix.os == 'macOS-latest'
         run: brew install automake
-      - name: Set up shell
-        if: matrix.os == 'windows-latest'
-        run: |
-          echo ::add-path::C:\msys64\usr\bin\
-          rm.exe "C:/WINDOWS/system32/bash.EXE"
       - name: Check JVM
         shell: bash
         run: ./gradlew jvmTest
@@ -63,8 +88,10 @@ jobs:
         if: matrix.os == 'macOS-latest'
         uses: reactivecircus/android-emulator-runner@v2
         with:
-          api-level: 29
+          api-level: 27
-          ndk: 21.3.6528147
+          -build: 7425822  # workaround to emulator bug: https://github.com/ReactiveCircus/android-emulator-runner/issues/160
+          emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
+          ndk: ${{ env.ANDROID_NDK_VERSION }}
           cmake: 3.10.2.4988404
           script: ./gradlew connectedCheck
       - name: Publish Linux
@@ -73,49 +100,63 @@ jobs:
           BINTRAY_USER: ${{ secrets.bintray_user }}
           BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
         shell: bash
-        run: ./gradlew publishLinuxPublicationToBintrayRepository :jni:jvm:linux:publishJvmPublicationToBintrayRepository -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
+#          ./gradlew publishLinuxPublicationToBintrayRepository :jni:jvm:linux:publishJvmPublicationToBintrayRepository -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
+        run: ./gradlew publishLinuxPublicationToMavenLocal :jni:jvm:linux:publishJvmPublicationToMavenLocal -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
       - name: Publish Windows
         if: matrix.os == 'windows-latest'
         env:
           BINTRAY_USER: ${{ secrets.bintray_user }}
           BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
         shell: bash
-        run: ./gradlew :jni:jvm:mingw:publishJvmPublicationToBintrayRepository -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
+#          ./gradlew :jni:jvm:mingw:publishJvmPublicationToBintrayRepository -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
+        run: ./gradlew :jni:jvm:mingw:publishToMavenLocal -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
       - name: Publish MacOS
         if: matrix.os == 'macOS-latest'
         env:
           BINTRAY_USER: ${{ secrets.bintray_user }}
           BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
         shell: bash
-        run: ./gradlew publish -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
+#          ./gradlew publish -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
-      - name: Discard
+        run: ./gradlew publishToMavenLocal -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
-        if: ${{ failure() || cancelled() }}
+      - name: Copy artifact files
-        env:
+        run: |
-          BINTRAY_USER: ${{ secrets.bintray_user }}
+          mkdir -p maven-local/snapshot
-          BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
+          cp -r ~/.m2/repository/* maven-local/snapshot
-        run: ./gradlew postBintrayDiscard -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: snapshot
+          path: |
+            maven-local
+            !maven-local/**/maven-metadata-local.xml
+#      - name: Discard
+#        if: ${{ failure() || cancelled() }}
+#        env:
+#          BINTRAY_USER: ${{ secrets.bintray_user }}
+#          BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
+#        run: ./gradlew postBintrayDiscard -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
 
-  publish:
+#  publish:
-    name: Publish
+#    name: Publish
-    needs: upload
+#    needs: upload
-    runs-on: ubuntu-latest
+#    runs-on: ubuntu-latest
-    steps:
+#    steps:
-      - name: Check out
+#      - name: Check out
-        uses: actions/checkout@v2
+#        uses: actions/checkout@v2
-        with:
+#        with:
-          submodules: 'true'
+#          submodules: 'true'
-      - name: Cached Gradle
+#      - name: Cached Gradle
-        uses: actions/cache@v2
+#        uses: actions/cache@v2
-        with:
+#        with:
-          path: ~/.gradle
+#          path: ~/.gradle
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
+#          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
-          restore-keys: ${{ runner.os }}-gradle-
+#          restore-keys: ${{ runner.os }}-gradle-
-      - name: Set up JDK 11
+#      - name: Set up JDK 11
-        uses: actions/setup-java@v1
+#        uses: actions/setup-java@v1
-        with:
+#        with:
-          java-version: 11
+#          java-version: 11
-      - name: Publish
+#      - name: Publish
-        env:
+#        env:
-          BINTRAY_USER: ${{ secrets.bintray_user }}
+#          BINTRAY_USER: ${{ secrets.bintray_user }}
-          BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
+#          BINTRAY_APIKEY: ${{ secrets.bintray_apikey }}
-        run: ./gradlew postBintrayPublish -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}
+#        run: ./gradlew postBintrayPublish -PsnapshotNumber=${{ github.run_number }} -PgitRef=${{ github.ref }}

.github/workflows/test.yml

@@ -10,7 +10,8 @@ on:
       - '!.github/workflows/test.yml'
   push:
     branches:
-      - 'master'
+      - '!master'
+      - '!snapshot/*'
     paths-ignore:
       - '**.md'
       - '**.adoc'
@@ -42,6 +43,35 @@ jobs:
           path: ~/.gradle
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
           restore-keys: ${{ runner.os }}-gradle-
+      - name: Android environment
+        shell: bash
+        run: |
+          echo "ANDROID_HOME=$ANDROID_HOME" >> $GITHUB_ENV
+          echo "ANDROID_NDK_VERSION=21.4.7075529" >> $GITHUB_ENV
+      - name: Cached Android NDK
+        uses: actions/cache@v2
+        with:
+          path: ${{ format('{0}/ndk/{1}', env.ANDROID_HOME, env.ANDROID_NDK_VERSION) }}
+          key: ${{ runner.os }}-android-ndk-${{ env.ANDROID_NDK_VERSION }}
+      - name: Set up shell
+        if: matrix.os == 'windows-latest'
+        run: |
+          echo "C:\msys64\usr\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          rm.exe "C:/WINDOWS/system32/bash.EXE"
+      - name: Set up JDK 8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 8
+      - name: Setup Android
+        if: matrix.os != 'windows-latest'
+        shell: bash
+        run: |
+          $ANDROID_HOME/tools/bin/sdkmanager "ndk;$ANDROID_NDK_VERSION"
+      - name: Setup Android
+        if: matrix.os == 'windows-latest'
+        shell: bash
+        run: |
+          $ANDROID_HOME\\tools\\bin\\sdkmanager.bat "ndk;$ANDROID_NDK_VERSION"
       - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
@@ -49,11 +79,6 @@ jobs:
       - name: Install Automake
         if: matrix.os == 'macOS-latest'
         run: brew install automake
-      - name: Set up shell
-        if: matrix.os == 'windows-latest'
-        run: |
-          echo ::add-path::C:\msys64\usr\bin\
-          rm.exe "C:/WINDOWS/system32/bash.EXE"
       - name: Check JVM
         shell: bash
         run: ./gradlew jvmTest
@@ -69,7 +94,9 @@ jobs:
         if: matrix.os == 'macOS-latest'
         uses: reactivecircus/android-emulator-runner@v2
         with:
-          api-level: 29
+          api-level: 27
-          ndk: 21.3.6528147
+          emulator-build: 7425822  # workaround to emulator bug: https://github.com/ReactiveCircus/android-emulator-runner/issues/160
+          emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
+          ndk: ${{ env.ANDROID_NDK_VERSION }}
           cmake: 3.10.2.4988404
           script: ./gradlew connectedCheck

README.md

@@ -1,19 +1,15 @@
+[![Kotlin](https://img.shields.io/badge/Kotlin-1.4.31-blue.svg?style=flat&logo=kotlin)](http://kotlinlang.org)
+[![Maven Central](https://img.shields.io/maven-central/v/fr.acinq.secp256k1/secp256k1-kmp)](https://search.maven.org/search?q=g:fr.acinq.secp256k1%20a:secp256k1-kmp*)
+![Github Actions](https://github.com/ACINQ/secp256k1-kmp/actions/workflows/test.yml/badge.svg)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/ACINQ/secp256k1-kmp/blob/master/LICENSE)
+
 # Secp256k1 for Kotlin/Multiplatform
 
 Kotlin/Multiplatform wrapper for Bitcoin Core's secp256k1 library. Targets: JVM, Android, iOS & Linux.
 
 ## Installation
 
-[ ![Download](https://api.bintray.com/packages/acinq/libs/secp256k1/images/download.svg) ](https://bintray.com/acinq/libs/secp256k1-kmp/)
+secp256k1-kmp is available on [maven central](https://search.maven.org/search?q=g:fr.acinq.secp256k1%20a:secp256k1-kmp*)
-
-First, you need to add the ACINQ libraries repository:
-
-```kotlin
-// build.gradle.kts
-repositories {
-    maven(url = "https://dl.bintray.com/acinq/libs")
-}
-```
 
 Then, the actual dependency depends on your targeted platform(s):
 

build.gradle.kts

@@ -1,35 +1,32 @@
-import org.apache.http.impl.client.HttpClients
-import org.apache.http.client.methods.HttpPost
-import org.apache.http.entity.ContentType
-import org.apache.http.entity.StringEntity
-import org.apache.http.impl.auth.BasicScheme
-import org.apache.http.auth.UsernamePasswordCredentials
 import org.gradle.internal.os.OperatingSystem
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget
+import org.jetbrains.dokka.Platform
 
 plugins {
-    kotlin("multiplatform") version "1.4.0"
+    kotlin("multiplatform") version "1.5.31"
+    id("org.jetbrains.dokka") version "1.5.30"
     `maven-publish`
 }
 
 buildscript {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 
     dependencies {
-        classpath("com.android.tools.build:gradle:4.0.1")
+        classpath("com.android.tools.build:gradle:4.0.2")
+        classpath("org.jetbrains.dokka:dokka-gradle-plugin:1.5.30")
     }
 }
 
 allprojects {
     group = "fr.acinq.secp256k1"
-    version = "0.3.0"
+    version = "0.6.0"
 
     repositories {
-        jcenter()
         google()
+        mavenCentral()
     }
 }
 
@@ -66,7 +63,6 @@ kotlin {
 
     ios {
         secp256k1CInterop("ios")
-        // https://youtrack.jetbrains.com/issue/KT-39396
         compilations["main"].defaultSourceSet.dependsOn(nativeMain)
         // https://youtrack.jetbrains.com/issue/KT-39396
         compilations["main"].kotlinOptions.freeCompilerArgs += listOf("-include-binary", "$rootDir/native/build/ios/libsecp256k1.a")
@@ -75,7 +71,6 @@ kotlin {
     sourceSets.all {
         languageSettings.useExperimentalAnnotation("kotlin.RequiresOptIn")
     }
-
 }
 
 // Disable cross compilation
@@ -108,41 +103,27 @@ allprojects {
     }
 }
 
-val snapshotNumber: String? by project
-val gitRef: String? by project
-val eapBranch = gitRef?.split("/")?.last() ?: "dev"
-val bintrayVersion = if (snapshotNumber != null) "${project.version}-$eapBranch-$snapshotNumber" else project.version.toString()
-val bintrayRepo = if (snapshotNumber != null) "snapshots" else "libs"
-
-val bintrayUsername: String? = (properties["bintrayUsername"] as String?) ?: System.getenv("BINTRAY_USER")
-val bintrayApiKey: String? = (properties["bintrayApiKey"] as String?) ?: System.getenv("BINTRAY_APIKEY")
-val hasBintray = bintrayUsername != null && bintrayApiKey != null
-if (!hasBintray) logger.warn("Skipping bintray configuration as bintrayUsername or bintrayApiKey is not defined")
-
 allprojects {
+    val javadocJar = tasks.create<Jar>("javadocJar") {
+        archiveClassifier.set("javadoc")
+        duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    }
+
+    // Publication
     plugins.withId("maven-publish") {
         publishing {
-            if (hasBintray) {
-                repositories {
-                    maven {
-                        name = "bintray"
-                        setUrl("https://api.bintray.com/maven/acinq/$bintrayRepo/${rootProject.name}/;publish=0")
-                        credentials {
-                            username = bintrayUsername
-                            password = bintrayApiKey
-                        }
-                    }
-                }
-            }
-
             publications.withType<MavenPublication>().configureEach {
-                version = bintrayVersion
+                version = project.version.toString()
+                artifact(javadocJar)
                 pom {
+                    name.set("secp256k1 for Kotlin/Multiplatform")
                     description.set("Bitcoin's secp256k1 library ported to Kotlin/Multiplatform for JVM, Android, iOS & Linux")
                     url.set("https://github.com/ACINQ/secp256k1-kmp")
                     licenses {
-                        name.set("Apache License v2.0")
+                        license {
-                        url.set("https://www.apache.org/licenses/LICENSE-2.0")
+                            name.set("Apache License v2.0")
+                            url.set("https://www.apache.org/licenses/LICENSE-2.0")
+                        }
                     }
                     issueManagement {
                         system.set("Github")
@@ -150,35 +131,49 @@ allprojects {
                     }
                     scm {
                         connection.set("https://github.com/ACINQ/secp256k1-kmp.git")
+                        url.set("https://github.com/ACINQ/secp256k1-kmp")
+                    }
+                    developers {
+                        developer {
+                            name.set("ACINQ")
+                            email.set("hello@acinq.co")
+                        }
                     }
                 }
             }
         }
     }
-}
 
-if (hasBintray) {
+    if (project.name !in listOf("native", "tests")) {
-    val postBintrayPublish by tasks.creating {
+        afterEvaluate {
-        doLast {
+            val dokkaOutputDir = buildDir.resolve("dokka")
-            HttpClients.createDefault().use { client ->
-                val post = HttpPost("https://api.bintray.com/content/acinq/$bintrayRepo/${rootProject.name}/$bintrayVersion/publish").apply {
-                    entity = StringEntity("{}", ContentType.APPLICATION_JSON)
-                    addHeader(BasicScheme().authenticate(UsernamePasswordCredentials(bintrayUsername, bintrayApiKey), this, null))
-                }
-                client.execute(post)
-            }
-        }
-    }
 
-    val postBintrayDiscard by tasks.creating {
+            tasks.dokkaHtml {
-        doLast {
+                outputDirectory.set(file(dokkaOutputDir))
-            HttpClients.createDefault().use { client ->
+                dokkaSourceSets {
-                val post = HttpPost("https://api.bintray.com/content/acinq/$bintrayRepo/${rootProject.name}/$bintrayVersion/publish").apply {
+                    configureEach {
-                    entity = StringEntity("{ \"discard\": true }", ContentType.APPLICATION_JSON)
+                        val platformName = when (platform.get()) {
-                    addHeader(BasicScheme().authenticate(UsernamePasswordCredentials(bintrayUsername, bintrayApiKey), this, null))
+                            Platform.jvm -> "jvm"
+                            Platform.js -> "js"
+                            Platform.native -> "native"
+                            Platform.common -> "common"
+                        }
+                        displayName.set(platformName)
+
+                        perPackageOption {
+                            matchingRegex.set(".*\\.internal.*") // will match all .internal packages and sub-packages
+                            suppress.set(true)
+                        }
+                    }
                 }
-                client.execute(post)
             }
+
+            val deleteDokkaOutputDir by tasks.register<Delete>("deleteDokkaOutputDirectory") {
+                delete(dokkaOutputDir)
+            }
+
+            javadocJar.dependsOn(deleteDokkaOutputDir, tasks.dokkaHtml)
+            javadocJar.from(dokkaOutputDir)
         }
     }
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

jni/android/build.gradle.kts

@@ -1,6 +1,9 @@
+import org.jetbrains.dokka.Platform
+
 plugins {
     id("com.android.library")
     kotlin("android")
+    id("org.jetbrains.dokka")
     `maven-publish`
 }
 
@@ -32,7 +35,7 @@ android {
             setPath("src/main/CMakeLists.txt")
         }
     }
-    ndkVersion = "21.3.6528147"
+    ndkVersion = "21.4.7075529"
 
     afterEvaluate {
         tasks.withType<com.android.build.gradle.tasks.factory.AndroidUnitTest>().all {
@@ -51,8 +54,13 @@ afterEvaluate {
     publishing {
         publications {
             create<MavenPublication>("android") {
-                artifactId = "secp256k1-jni-android"
+                artifactId = "secp256k1-kmp-jni-android"
                 from(components["release"])
+                val sourcesJar = task<Jar>("sourcesJar") {
+                    archiveClassifier.set("sources")
+                    from(android.sourceSets["main"].java.srcDirs)
+                }
+                artifact(sourcesJar)
             }
         }
     }

jni/build.gradle.kts

@@ -1,5 +1,8 @@
+import org.jetbrains.dokka.Platform
+
 plugins {
     kotlin("jvm")
+    id("org.jetbrains.dokka")
     `maven-publish`
 }
 
@@ -34,8 +37,13 @@ val generateHeaders by tasks.creating(JavaCompile::class) {
 publishing {
     publications {
         create<MavenPublication>("jvm") {
-            artifactId = "secp256k1-jni-common"
+            artifactId = "secp256k1-kmp-jni-common"
             from(components["java"])
+            val sourcesJar = task<Jar>("sourcesJar") {
+                archiveClassifier.set("sources")
+                from(sourceSets["main"].allSource)
+            }
+            artifact(sourcesJar)
         }
     }
 }

jni/c/src/fr_acinq_secp256k1_Secp256k1CFunctions.c

@@ -133,11 +133,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
 
     CHECKRESULT((*penv)->GetArrayLength(penv, jseckey) != 32, "secret key must be 32 bytes");
     seckey = (*penv)->GetByteArrayElements(penv, jseckey, 0);
-    jpubkey = (*penv)->NewByteArray(penv, 65);
-    pubkey = (*penv)->GetByteArrayElements(penv, jpubkey, 0);
     result = secp256k1_ec_pubkey_create(ctx, &pub, (unsigned char*)seckey);
     (*penv)->ReleaseByteArrayElements(penv, jseckey, seckey, 0);
-    (*penv)->ReleaseByteArrayElements(penv, jpubkey, pubkey, 0);
     CHECKRESULT(!result, "secp256k1_ec_pubkey_create failed");
     jpubkey = (*penv)->NewByteArray(penv, 65);
     pubkey = (*penv)->GetByteArrayElements(penv, jpubkey, 0);

jni/jvm/all/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     `java-library`
+    id("org.jetbrains.dokka")
     `maven-publish`
 }
 
@@ -12,8 +13,12 @@ dependencies {
 publishing {
     publications {
         create<MavenPublication>("jvm") {
-            artifactId = "secp256k1-jni-jvm"
+            artifactId = "secp256k1-kmp-jni-jvm"
             from(components["java"])
+            val sourcesJar = task<Jar>("sourcesJar") {
+                archiveClassifier.set("sources")
+            }
+            artifact(sourcesJar)
         }
     }
 }

jni/jvm/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     kotlin("jvm")
+    id("org.jetbrains.dokka")
     `maven-publish`
 }
 
@@ -33,8 +34,12 @@ dependencies {
 publishing {
     publications {
         create<MavenPublication>("jvm") {
-            artifactId = "secp256k1-jni-jvm-extract"
+            artifactId = "secp256k1-kmp-jni-jvm-extract"
             from(components["java"])
+            val sourcesJar = task<Jar>("sourcesJar") {
+                archiveClassifier.set("sources")
+            }
+            artifact(sourcesJar)
         }
     }
 }

jni/jvm/build.sh

@@ -14,11 +14,9 @@ JNI_HEADERS=$TARGET
 
 if [ "$TARGET" == "linux" ]; then
   OUTFILE=libsecp256k1-jni.so
-  ADD_LIB=-lgmp
   CC_OPTS="-fPIC"
 elif [ "$TARGET" == "darwin" ]; then
   OUTFILE=libsecp256k1-jni.dylib
-  ADD_LIB=-lgmp
 elif [ "$TARGET" == "mingw" ]; then
   OUTFILE=secp256k1-jni.dll
   CC=x86_64-w64-mingw32-gcc

jni/jvm/darwin/build.gradle.kts

@@ -1,5 +1,7 @@
 plugins {
     kotlin("jvm")
+    `java-library`
+    id("org.jetbrains.dokka")
     `maven-publish`
 }
 
@@ -23,8 +25,12 @@ val copyJni by tasks.creating(Sync::class) {
 publishing {
     publications {
         val pub = create<MavenPublication>("jvm") {
-            artifactId = "secp256k1-jni-jvm-darwin"
+            artifactId = "secp256k1-kmp-jni-jvm-darwin"
             from(components["java"])
+            val sourcesJar = task<Jar>("sourcesJar") {
+                archiveClassifier.set("sources")
+            }
+            artifact(sourcesJar)
         }
         if (!org.gradle.internal.os.OperatingSystem.current().isMacOsX) {
             tasks.withType<AbstractPublishToMaven>().all { onlyIf { publication != pub } }

jni/jvm/linux/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     kotlin("jvm")
+    id("org.jetbrains.dokka")
     `maven-publish`
 }
 
@@ -23,8 +24,12 @@ val copyJni by tasks.creating(Sync::class) {
 publishing {
     publications {
         val pub = create<MavenPublication>("jvm") {
-            artifactId = "secp256k1-jni-jvm-linux"
+            artifactId = "secp256k1-kmp-jni-jvm-linux"
             from(components["java"])
+            val sourcesJar = task<Jar>("sourcesJar") {
+                archiveClassifier.set("sources")
+            }
+            artifact(sourcesJar)
         }
         if (!org.gradle.internal.os.OperatingSystem.current().isLinux) {
             tasks.withType<AbstractPublishToMaven>().all { onlyIf { publication != pub } }

jni/jvm/mingw/build.gradle.kts

@@ -1,5 +1,6 @@
 plugins {
     kotlin("jvm")
+    id("org.jetbrains.dokka")
     `maven-publish`
 }
 
@@ -23,8 +24,12 @@ val copyJni by tasks.creating(Sync::class) {
 publishing {
     publications {
         val pub = create<MavenPublication>("jvm") {
-            artifactId = "secp256k1-jni-jvm-mingw"
+            artifactId = "secp256k1-kmp-jni-jvm-mingw"
             from(components["java"])
+            val sourcesJar = task<Jar>("sourcesJar") {
+                archiveClassifier.set("sources")
+            }
+            artifact(sourcesJar)
         }
         if (!org.gradle.internal.os.OperatingSystem.current().isWindows) {
             tasks.withType<AbstractPublishToMaven>().all { onlyIf { publication != pub } }

jni/jvm/src/main/kotlin/fr/acinq/secp256k1/jni/OSInfo.kt

@@ -154,7 +154,7 @@ internal object OSInfo {
                if (systemOsArch.startsWith("arm")) {
                    resolveArmArchType()
                } else {
-                   val lc = systemOsArch.toLowerCase(Locale.US)
+                   val lc = systemOsArch.lowercase(Locale.US)
                    if (archMapping.containsKey(lc)) return archMapping[lc]
                    systemOsArch
                }

native/build.sh

@@ -15,7 +15,6 @@ if [ "$TARGET" == "mingw" ]; then
   CONF_OPTS="CFLAGS=-fPIC --host=x86_64-w64-mingw32"
 elif [ "$TARGET" == "linux" ]; then
   CONF_OPTS="CFLAGS=-fPIC"
-  [ "$CROSS" == "1" ] && sudo apt -y install libgmp-dev
 elif [ "$TARGET" == "darwin" ]; then
   CONF_OPTS="--host=x86_64-w64-darwin"
 else

settings.gradle.kts

@@ -5,7 +5,7 @@ pluginManagement {
         jcenter()
     }
 }
-rootProject.name = "secp256k1"
+rootProject.name = "secp256k1-kmp"
 
 include(
     ":native",
@@ -17,4 +17,4 @@ include(
     ":jni:jvm:mingw",
     ":jni:jvm:all",
     ":tests"
-)
+)

src/jvmMain/kotlin/fr/acinq/secp256k1/Secp256k1Jvm.kt

@@ -20,12 +20,12 @@ import java.util.*
 
 
 private fun tryLoad(platform: String): Secp256k1? {
-    try {
+    return try {
-        val cls = Class.forName("fr.acinq.secp256k1.jni.NativeSecp256k1${platform.capitalize(Locale.ROOT)}Loader")
+        val cls = Class.forName("fr.acinq.secp256k1.jni.NativeSecp256k1${platform.replaceFirstChar { if (it.isLowerCase()) it.titlecase(Locale.ROOT) else it.toString() }}Loader")
         val load = cls.getMethod("load")
-        return load.invoke(null) as Secp256k1
+        load.invoke(null) as Secp256k1
     } catch (ex: ClassNotFoundException) {
-        return null
+        null
     }
 }
 

src/nativeInterop/cinterop/libsecp256k1.def

@@ -4,7 +4,7 @@ headers = secp256k1.h secp256k1_ecdh.h secp256k1_recovery.h
 headerFilter = secp256k1/** secp256k1_ecdh.h secp256k1_recovery.h secp256k1.h
 
 libraryPaths.linux = c/secp256k1/build/linux/
-linkerOpts.linux = -L/usr/lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/local/lib -lgmp
+linkerOpts.linux = -L/usr/lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/local/lib
 
 libraryPaths.ios = c/secp256k1/build/ios/ /usr/local/lib
 linkerOpts.ios = -framework Security -framework Foundation

src/nativeMain/kotlin/fr/acinq/secp256k1/Secp256k1Native.kt

@@ -79,7 +79,7 @@ public object Secp256k1Native : Secp256k1 {
     }
 
     public override fun signatureNormalize(sig: ByteArray): Pair<ByteArray, Boolean> {
-        require(sig.size == 64 || sig.size in 70..73)
+        require(sig.size >= 64){ "invalid signature ${Hex.encode(sig)}" }
         memScoped {
             val nSig = allocSignature(sig)
             val isHighS = secp256k1_ecdsa_signature_normalize(ctx, nSig.ptr, nSig.ptr)

tests/build.gradle.kts

@@ -38,8 +38,8 @@ kotlin {
         }
         sourceSets["androidTest"].dependencies {
             implementation(kotlin("test-junit"))
-            implementation("androidx.test.ext:junit:1.1.1")
+            implementation("androidx.test.ext:junit:1.1.2")
-            implementation("androidx.test.espresso:espresso-core:3.2.0")
+            implementation("androidx.test.espresso:espresso-core:3.3.0")
         }
     }
 

tests/src/commonTest/kotlin/fr/acinq/secp256k1/Secp256k1Test.kt

@@ -13,12 +13,12 @@ class Secp256k1Test {
     @Test
     fun testVerifyPos() {
         var result: Boolean
-        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".toLowerCase()) //sha256hash of "testing"
+        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".lowercase()) //sha256hash of "testing"
-        val sig: ByteArray = Hex.decode("3044022079BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F817980220294F14E883B3F525B5367756C2A11EF6CF84B730B36C17CB0C56F0AAB2C98589".toLowerCase())
+        val sig: ByteArray = Hex.decode("3044022079BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F817980220294F14E883B3F525B5367756C2A11EF6CF84B730B36C17CB0C56F0AAB2C98589".lowercase())
-        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".toLowerCase())
+        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".lowercase())
         result = Secp256k1.verify(sig, data, pub)
         assertTrue(result, "testVerifyPos")
-        val sigCompact: ByteArray = Hex.decode("79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798294F14E883B3F525B5367756C2A11EF6CF84B730B36C17CB0C56F0AAB2C98589".toLowerCase())
+        val sigCompact: ByteArray = Hex.decode("79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798294F14E883B3F525B5367756C2A11EF6CF84B730B36C17CB0C56F0AAB2C98589".lowercase())
         result = Secp256k1.verify(sigCompact, data, pub)
         assertTrue(result, "testVerifyPos")
     }
@@ -26,9 +26,9 @@ class Secp256k1Test {
     @Test
     fun testVerifyNeg() {
         var result: Boolean
-        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A91".toLowerCase()) //sha256hash of "testing"
+        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A91".lowercase()) //sha256hash of "testing"
-        val sig: ByteArray = Hex.decode("3044022079BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F817980220294F14E883B3F525B5367756C2A11EF6CF84B730B36C17CB0C56F0AAB2C98589".toLowerCase())
+        val sig: ByteArray = Hex.decode("3044022079BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F817980220294F14E883B3F525B5367756C2A11EF6CF84B730B36C17CB0C56F0AAB2C98589".lowercase())
-        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".toLowerCase())
+        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".lowercase())
         result = Secp256k1.verify(sig, data, pub)
         assertFalse(result, "testVerifyNeg")
     }
@@ -36,7 +36,7 @@ class Secp256k1Test {
     @Test
     fun testSecKeyVerifyPos() {
         var result: Boolean
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
         result = Secp256k1.secKeyVerify(sec)
         assertTrue(result, "testSecKeyVerifyPos")
     }
@@ -44,16 +44,16 @@ class Secp256k1Test {
     @Test
     fun testSecKeyVerifyNeg() {
         var result: Boolean
-        val sec: ByteArray = Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".toLowerCase())
+        val sec: ByteArray = Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".lowercase())
         result = Secp256k1.secKeyVerify(sec)
         assertFalse(result, "testSecKeyVerifyNeg")
     }
 
     @Test
     fun testPubKeyCreatePos() {
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
         val resultArr: ByteArray = Secp256k1.pubkeyCreate(sec)
-        val pubkeyString: String = Hex.encode(resultArr).toUpperCase()
+        val pubkeyString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "04C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D2103ED494718C697AC9AEBCFD19612E224DB46661011863ED2FC54E71861E2A6",
             pubkeyString,
@@ -63,7 +63,7 @@ class Secp256k1Test {
 
     @Test
     fun testPubKeyCreateNeg() {
-        val sec: ByteArray = Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".toLowerCase())
+        val sec: ByteArray = Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".lowercase())
         assertFailsWith<Secp256k1Exception> {
             Secp256k1.pubkeyCreate(sec)
         }
@@ -73,21 +73,21 @@ class Secp256k1Test {
     fun testPubkeyCompress() {
         val pub = Hex.decode("04C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D2103ED494718C697AC9AEBCFD19612E224DB46661011863ED2FC54E71861E2A6")
         val compressed = Secp256k1.pubKeyCompress(pub)
-        assertEquals("02C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D", Hex.encode(compressed).toUpperCase())
+        assertEquals("02C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D", Hex.encode(compressed).uppercase())
     }
 
     @Test
     fun testPubKeyNegatePos() {
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
         val pubkey: ByteArray = Secp256k1.pubkeyCreate(sec)
-        val pubkeyString: String = Hex.encode(pubkey).toUpperCase()
+        val pubkeyString: String = Hex.encode(pubkey).uppercase()
         assertEquals(
             "04C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D2103ED494718C697AC9AEBCFD19612E224DB46661011863ED2FC54E71861E2A6",
             pubkeyString,
             "testPubKeyCreatePos"
         )
         val pubkey1: ByteArray = Secp256k1.pubKeyNegate(pubkey)
-        val pubkeyString1: String = Hex.encode(pubkey1).toUpperCase()
+        val pubkeyString1: String = Hex.encode(pubkey1).uppercase()
         assertEquals(
             "04C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2DDEFC12B6B8E73968536514302E69ED1DDB24B999EFEE79C12D03AB17E79E1989",
             pubkeyString1,
@@ -97,9 +97,9 @@ class Secp256k1Test {
 
     @Test
     fun testPubKeyParse() {
-        val pub: ByteArray = Hex.decode("02C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D".toLowerCase())
+        val pub: ByteArray = Hex.decode("02C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D".lowercase())
         val resultArr: ByteArray = Secp256k1.pubkeyParse(pub)
-        val pubkeyString: String = Hex.encode(resultArr).toUpperCase()
+        val pubkeyString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "04C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D2103ED494718C697AC9AEBCFD19612E224DB46661011863ED2FC54E71861E2A6",
             pubkeyString,
@@ -109,10 +109,10 @@ class Secp256k1Test {
 
     @Test
     fun testPubKeyAdd() {
-        val pub1: ByteArray = Hex.decode("041b84c5567b126440995d3ed5aaba0565d71e1834604819ff9c17f5e9d5dd078f70beaf8f588b541507fed6a642c5ab42dfdf8120a7f639de5122d47a69a8e8d1".toLowerCase())
+        val pub1: ByteArray = Hex.decode("041b84c5567b126440995d3ed5aaba0565d71e1834604819ff9c17f5e9d5dd078f70beaf8f588b541507fed6a642c5ab42dfdf8120a7f639de5122d47a69a8e8d1".lowercase())
-        val pub2: ByteArray = Hex.decode("044d4b6cd1361032ca9bd2aeb9d900aa4d45d9ead80ac9423374c451a7254d07662a3eada2d0fe208b6d257ceb0f064284662e857f57b66b54c198bd310ded36d0".toLowerCase())
+        val pub2: ByteArray = Hex.decode("044d4b6cd1361032ca9bd2aeb9d900aa4d45d9ead80ac9423374c451a7254d07662a3eada2d0fe208b6d257ceb0f064284662e857f57b66b54c198bd310ded36d0".lowercase())
         val pub3: ByteArray = Secp256k1.pubKeyAdd(pub1, pub2)
-        val pubkeyString: String = Hex.encode(pub3).toUpperCase()
+        val pubkeyString: String = Hex.encode(pub3).uppercase()
         assertEquals(
             "04531FE6068134503D2723133227C867AC8FA6C83C537E9A44C3C5BDBDCB1FE3379E92C265E71E481BA82A84675A47AC705A200FCD524E92D93B0E7386F26A5458",
             pubkeyString,
@@ -122,10 +122,10 @@ class Secp256k1Test {
 
     @Test
     fun testSignPos() {
-        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".toLowerCase()) //sha256hash of "testing"
+        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".lowercase()) //sha256hash of "testing"
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
         val resultArr: ByteArray = Secp256k1.sign(data, sec)
-        val sigString: String = Hex.encode(resultArr).toUpperCase()
+        val sigString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "182A108E1448DC8F1FB467D06A0F3BB8EA0533584CB954EF8DA112F1D60E39A21C66F36DA211C087F3AF88B50EDF4F9BDAA6CF5FD6817E74DCA34DB12390C6E9",
             sigString,
@@ -135,9 +135,9 @@ class Secp256k1Test {
 
     @Test
     fun testSignatureNormalize() {
-        val data: ByteArray = Hex.decode("30440220182A108E1448DC8F1FB467D06A0F3BB8EA0533584CB954EF8DA112F1D60E39A202201C66F36DA211C087F3AF88B50EDF4F9BDAA6CF5FD6817E74DCA34DB12390C6E9".toLowerCase())
+        val data: ByteArray = Hex.decode("30440220182A108E1448DC8F1FB467D06A0F3BB8EA0533584CB954EF8DA112F1D60E39A202201C66F36DA211C087F3AF88B50EDF4F9BDAA6CF5FD6817E74DCA34DB12390C6E9".lowercase())
         val (resultArr, isHighS) = Secp256k1.signatureNormalize(data)
-        val sigString: String = Hex.encode(resultArr).toUpperCase()
+        val sigString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "182A108E1448DC8F1FB467D06A0F3BB8EA0533584CB954EF8DA112F1D60E39A21C66F36DA211C087F3AF88B50EDF4F9BDAA6CF5FD6817E74DCA34DB12390C6E9",
             sigString,
@@ -148,8 +148,8 @@ class Secp256k1Test {
 
     @Test
     fun testSignNeg() {
-        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".toLowerCase()) //sha256hash of "testing"
+        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".lowercase()) //sha256hash of "testing"
-        val sec: ByteArray = Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".toLowerCase())
+        val sec: ByteArray = Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".lowercase())
         assertFailsWith<Secp256k1Exception> {
             Secp256k1.sign(data, sec)
         }
@@ -157,10 +157,10 @@ class Secp256k1Test {
 
     @Test
     fun testSignCompactPos() {
-        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".toLowerCase()) //sha256hash of "testing"
+        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".lowercase()) //sha256hash of "testing"
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
         val resultArr: ByteArray = Secp256k1.sign(data, sec)
-        val sigString: String = Hex.encode(resultArr).toUpperCase()
+        val sigString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "182A108E1448DC8F1FB467D06A0F3BB8EA0533584CB954EF8DA112F1D60E39A21C66F36DA211C087F3AF88B50EDF4F9BDAA6CF5FD6817E74DCA34DB12390C6E9",
             sigString,
@@ -170,11 +170,11 @@ class Secp256k1Test {
 
     @Test
     fun testPrivKeyTweakNegate() {
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
         val sec1: ByteArray = Secp256k1.privKeyNegate(sec)
         assertEquals(
             "981A9A7DD677A622518DA068D66D5F824E5F22F084B8A0E2F195B5662F300C11",
-            Hex.encode(sec1).toUpperCase(),
+            Hex.encode(sec1).uppercase(),
             "testPrivKeyNegate"
         )
         val sec2: ByteArray = Secp256k1.privKeyNegate(sec1)
@@ -183,10 +183,10 @@ class Secp256k1Test {
 
     @Test
     fun testPrivKeyTweakAdd_1() {
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
-        val data: ByteArray = Hex.decode("3982F19BEF1615BCCFBB05E321C10E1D4CBA3DF0E841C2E41EEB6016347653C3".toLowerCase()) //sha256hash of "tweak"
+        val data: ByteArray = Hex.decode("3982F19BEF1615BCCFBB05E321C10E1D4CBA3DF0E841C2E41EEB6016347653C3".lowercase()) //sha256hash of "tweak"
         val resultArr: ByteArray = Secp256k1.privKeyTweakAdd(sec, data)
-        val sigString: String = Hex.encode(resultArr).toUpperCase()
+        val sigString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "A168571E189E6F9A7E2D657A4B53AE99B909F7E712D1C23CED28093CD57C88F3",
             sigString,
@@ -196,10 +196,10 @@ class Secp256k1Test {
 
     @Test
     fun testPrivKeyTweakMul_1() {
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
-        val data: ByteArray = Hex.decode("3982F19BEF1615BCCFBB05E321C10E1D4CBA3DF0E841C2E41EEB6016347653C3".toLowerCase()) //sha256hash of "tweak"
+        val data: ByteArray = Hex.decode("3982F19BEF1615BCCFBB05E321C10E1D4CBA3DF0E841C2E41EEB6016347653C3".lowercase()) //sha256hash of "tweak"
         val resultArr: ByteArray = Secp256k1.privKeyTweakMul(sec, data)
-        val sigString: String = Hex.encode(resultArr).toUpperCase()
+        val sigString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "97F8184235F101550F3C71C927507651BD3F1CDB4A5A33B8986ACF0DEE20FFFC",
             sigString,
@@ -209,10 +209,10 @@ class Secp256k1Test {
 
     @Test
     fun testPrivKeyTweakAdd_2() {
-        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".toLowerCase())
+        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".lowercase())
-        val data: ByteArray = Hex.decode("3982F19BEF1615BCCFBB05E321C10E1D4CBA3DF0E841C2E41EEB6016347653C3".toLowerCase()) //sha256hash of "tweak"
+        val data: ByteArray = Hex.decode("3982F19BEF1615BCCFBB05E321C10E1D4CBA3DF0E841C2E41EEB6016347653C3".lowercase()) //sha256hash of "tweak"
         val resultArr: ByteArray = Secp256k1.pubKeyTweakAdd(pub, data)
-        val sigString: String = Hex.encode(resultArr).toUpperCase()
+        val sigString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "0411C6790F4B663CCE607BAAE08C43557EDC1A4D11D88DFCB3D841D0C6A941AF525A268E2A863C148555C48FB5FBA368E88718A46E205FABC3DBA2CCFFAB0796EF",
             sigString,
@@ -222,10 +222,10 @@ class Secp256k1Test {
 
     @Test
     fun testPrivKeyTweakMul_2() {
-        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".toLowerCase())
+        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".lowercase())
-        val data: ByteArray = Hex.decode("3982F19BEF1615BCCFBB05E321C10E1D4CBA3DF0E841C2E41EEB6016347653C3".toLowerCase()) //sha256hash of "tweak"
+        val data: ByteArray = Hex.decode("3982F19BEF1615BCCFBB05E321C10E1D4CBA3DF0E841C2E41EEB6016347653C3".lowercase()) //sha256hash of "tweak"
         val resultArr: ByteArray = Secp256k1.pubKeyTweakMul(pub, data)
-        val sigString: String = Hex.encode(resultArr).toUpperCase()
+        val sigString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "04E0FE6FE55EBCA626B98A807F6CAF654139E14E5E3698F01A9A658E21DC1D2791EC060D4F412A794D5370F672BC94B722640B5F76914151CFCA6E712CA48CC589",
             sigString,
@@ -235,10 +235,10 @@ class Secp256k1Test {
 
     @Test
     fun testCreateECDHSecret() {
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
-        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".toLowerCase())
+        val pub: ByteArray = Hex.decode("040A629506E1B65CD9D2E0BA9C75DF9C4FED0DB16DC9625ED14397F0AFC836FAE595DC53F8B0EFE61E703075BD9B143BAC75EC0E19F82A2208CAEB32BE53414C40".lowercase())
         val resultArr: ByteArray = Secp256k1.ecdh(sec, pub)
-        val ecdhString: String = Hex.encode(resultArr).toUpperCase()
+        val ecdhString: String = Hex.encode(resultArr).uppercase()
         assertEquals(
             "2A2A67007A926E6594AF3EB564FC74005B37A9C8AEF2033C4552051B5C87F043",
             ecdhString,
@@ -248,8 +248,8 @@ class Secp256k1Test {
 
     @Test
     fun testEcdsaRecover() {
-        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".toLowerCase()) //sha256hash of "testing"
+        val data: ByteArray = Hex.decode("CF80CD8AED482D5D1527D7DC72FCEFF84E6326592848447D2DC0B0E87DFC9A90".lowercase()) //sha256hash of "testing"
-        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase())
+        val sec: ByteArray = Hex.decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".lowercase())
         val pub: ByteArray = Secp256k1.pubkeyCreate(sec)
         val sig: ByteArray = Secp256k1.sign(data, sec)
         val pub0: ByteArray = Secp256k1.ecdsaRecover(sig, data, 0)
@@ -259,11 +259,11 @@ class Secp256k1Test {
 
     @Test
     fun testCompactToDER() {
-        val sig: ByteArray = Hex.decode("182A108E1448DC8F1FB467D06A0F3BB8EA0533584CB954EF8DA112F1D60E39A21C66F36DA211C087F3AF88B50EDF4F9BDAA6CF5FD6817E74DCA34DB12390C6E9".toLowerCase()) //sha256hash of "testing"
+        val sig: ByteArray = Hex.decode("182A108E1448DC8F1FB467D06A0F3BB8EA0533584CB954EF8DA112F1D60E39A21C66F36DA211C087F3AF88B50EDF4F9BDAA6CF5FD6817E74DCA34DB12390C6E9".lowercase()) //sha256hash of "testing"
         val der: ByteArray = Secp256k1.compact2der(sig)
         assertEquals(
             "30440220182A108E1448DC8F1FB467D06A0F3BB8EA0533584CB954EF8DA112F1D60E39A202201C66F36DA211C087F3AF88B50EDF4F9BDAA6CF5FD6817E74DCA34DB12390C6E9",
-            Hex.encode(der).toUpperCase(),
+            Hex.encode(der).uppercase(),
         )
     }