Use local secp256k1 callbacks in kotlin native code

These callbacks are only triggered either by arguments do not match explicit rquirements of the sepc256k1 library, or by hardware failures, memory corruption
or bug in secp256k1, and not by misuse of the library.
In theory we do not need to implement them, except to find bugs in our own code, but the default callbacks print a message to stderr and call abort() which
is not nice especially on mobile apps.

=> Here we introduce 2 specific exceptions, Secp256k1ErrorCallbackException and Secp256k1IllegalCallbackException, which are thrown when the error callback or illegal callback are called.

.github/workflows/release.yml

@@ -86,7 +86,7 @@ jobs:
       - name: Check Linux
         if: matrix.os == 'ubuntu-latest'
         shell: bash
-        run: ./gradlew linuxX64Test
+        run: ./gradlew linuxTest
       - name: Check iOS
         if: matrix.os == 'macOS-latest'
         shell: bash
@@ -103,7 +103,7 @@ jobs:
       - name: Publish Linux
         if: matrix.os == 'ubuntu-latest'
         shell: bash
-        run: ./gradlew publishLinuxX64PublicationToMavenLocal :jni:jvm:linux:publishJvmPublicationToMavenLocal
+        run: ./gradlew publishLinuxPublicationToMavenLocal :jni:jvm:linux:publishJvmPublicationToMavenLocal
       - name: Publish Windows
         if: matrix.os == 'windows-latest'
         shell: msys2 {0}

.github/workflows/snapshot.yml

@@ -95,7 +95,7 @@ jobs:
       - name: Check Linux
         if: matrix.os == 'ubuntu-latest'
         shell: bash
-        run: ./gradlew linuxX64Test
+        run: ./gradlew linuxTest
       - name: Check iOS
         if: matrix.os == 'macOS-latest'
         shell: bash
@@ -112,7 +112,7 @@ jobs:
       - name: Publish Linux
         if: matrix.os == 'ubuntu-latest'
         shell: bash
-        run: ./gradlew publishLinuxX64PublicationToMavenLocal :jni:jvm:linux:publishJvmPublicationToMavenLocal -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'
         shell: msys2 {0}

.github/workflows/test.yml

@@ -101,7 +101,7 @@ jobs:
       - name: Check Linux
         if: matrix.os == 'ubuntu-latest'
         shell: bash
-        run: ./gradlew linuxX64Test
+        run: ./gradlew linuxTest
       - name: Check iOS
         if: matrix.os == 'macOS-latest'
         shell: bash

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "native/secp256k1"]
 	path = native/secp256k1
-	url = https://github.com/jonasnick/secp256k1.git
+	url = https://github.com/bitcoin-core/secp256k1.git

build.gradle.kts

@@ -3,8 +3,8 @@ import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget
 import org.jetbrains.dokka.Platform
 
 plugins {
-    kotlin("multiplatform") version "1.9.21"
-    id("org.jetbrains.dokka") version "1.9.10"
+    kotlin("multiplatform") version "1.8.21"
+    id("org.jetbrains.dokka") version "1.8.10"
     `maven-publish`
 }
 
@@ -16,13 +16,13 @@ buildscript {
 
     dependencies {
         classpath("com.android.tools.build:gradle:7.3.1")
-        classpath("org.jetbrains.dokka:dokka-gradle-plugin:1.9.10")
+        classpath("org.jetbrains.dokka:dokka-gradle-plugin:1.8.10")
     }
 }
 
 allprojects {
     group = "fr.acinq.secp256k1"
-    version = "0.13.0-MUSIG2-SNAPSHOT"
+    version = "0.12.0-SNAPSHOT"
 
     repositories {
         google()
@@ -52,22 +52,20 @@ kotlin {
         }
     }
 
-    val nativeMain by sourceSets.creating
+    val nativeMain by sourceSets.creating { dependsOn(commonMain) }
 
-    linuxX64 {
+    linuxX64("linux") {
         secp256k1CInterop("host")
+        compilations["main"].defaultSourceSet.dependsOn(nativeMain)
+        // https://youtrack.jetbrains.com/issue/KT-39396
+        compilations["main"].kotlinOptions.freeCompilerArgs += listOf("-include-binary", "$rootDir/native/build/linux/libsecp256k1.a")
     }
 
-    iosX64 {
-        secp256k1CInterop("ios")
-    }
-
-    iosArm64 {
-        secp256k1CInterop("ios")
-    }
-
-    iosSimulatorArm64 {
+    ios {
         secp256k1CInterop("ios")
+        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")
     }
 
     sourceSets.all {
@@ -82,9 +80,9 @@ allprojects {
             val currentOs = OperatingSystem.current()
             val targets = when {
                 currentOs.isLinux -> listOf()
-                currentOs.isMacOsX -> listOf("linuxX64")
-                currentOs.isWindows -> listOf("linuxX64")
-                else -> listOf("linuxX64")
+                currentOs.isMacOsX -> listOf("linux")
+                currentOs.isWindows -> listOf("linux")
+                else -> listOf("linux")
             }.mapNotNull { kotlin.targets.findByName(it) as? KotlinNativeTarget }
 
             configure(targets) {

jni/android/src/main/java/fr/acinq/secp256k1/jni/NativeSecp256k1AndroidLoader.kt

@@ -6,10 +6,11 @@ import fr.acinq.secp256k1.NativeSecp256k1
 import java.util.*
 
 public object NativeSecp256k1AndroidLoader {
+
     @JvmStatic
     @Synchronized
     @Throws(Exception::class)
-    public fun load(): Secp256k1 {
+    fun load(): Secp256k1 {
         try {
             System.loadLibrary("secp256k1-jni")
             return NativeSecp256k1
@@ -26,4 +27,5 @@ public object NativeSecp256k1AndroidLoader {
 
         }
     }
+
 }

jni/c/headers/java/fr_acinq_secp256k1_Secp256k1CFunctions.h

@@ -7,34 +7,6 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_TYPE_CONTEXT
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_TYPE_CONTEXT 1L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_TYPE_COMPRESSION
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_TYPE_COMPRESSION 2L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_BIT_CONTEXT_VERIFY
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_BIT_CONTEXT_VERIFY 256L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_BIT_CONTEXT_SIGN
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_BIT_CONTEXT_SIGN 512L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_BIT_COMPRESSION
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_FLAGS_BIT_COMPRESSION 256L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_CONTEXT_VERIFY
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_CONTEXT_VERIFY 257L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_CONTEXT_SIGN
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_CONTEXT_SIGN 513L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_CONTEXT_NONE
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_CONTEXT_NONE 1L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_EC_COMPRESSED
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_EC_COMPRESSED 258L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_EC_UNCOMPRESSED
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_EC_UNCOMPRESSED 2L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_PUBLIC_NONCE_SIZE
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_PUBLIC_NONCE_SIZE 66L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SECRET_NONCE_SIZE
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SECRET_NONCE_SIZE 132L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_KEYAGG_CACHE_SIZE
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_KEYAGG_CACHE_SIZE 197L
-#undef fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE
-#define fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE 133L
 /*
  * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
  * Method:    secp256k1_context_create
@@ -195,78 +167,6 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
 JNIEXPORT jint JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1schnorrsig_1verify
   (JNIEnv *, jclass, jlong, jbyteArray, jbyteArray, jbyteArray);
 
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_nonce_gen
- * Signature: (J[B[B[B[B[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1nonce_1gen
-  (JNIEnv *, jclass, jlong, jbyteArray, jbyteArray, jbyteArray, jbyteArray, jbyteArray, jbyteArray);
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_nonce_agg
- * Signature: (J[[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1nonce_1agg
-  (JNIEnv *, jclass, jlong, jobjectArray);
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_pubkey_agg
- * Signature: (J[[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1pubkey_1agg
-  (JNIEnv *, jclass, jlong, jobjectArray, jbyteArray);
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_pubkey_ec_tweak_add
- * Signature: (J[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1pubkey_1ec_1tweak_1add
-  (JNIEnv *, jclass, jlong, jbyteArray, jbyteArray);
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_pubkey_xonly_tweak_add
- * Signature: (J[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1pubkey_1xonly_1tweak_1add
-  (JNIEnv *, jclass, jlong, jbyteArray, jbyteArray);
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_nonce_process
- * Signature: (J[B[B[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1nonce_1process
-  (JNIEnv *, jclass, jlong, jbyteArray, jbyteArray, jbyteArray, jbyteArray);
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_partial_sign
- * Signature: (J[B[B[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1partial_1sign
-  (JNIEnv *, jclass, jlong, jbyteArray, jbyteArray, jbyteArray, jbyteArray);
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_partial_sig_verify
- * Signature: (J[B[B[B[B[B)I
- */
-JNIEXPORT jint JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1partial_1sig_1verify
-  (JNIEnv *, jclass, jlong, jbyteArray, jbyteArray, jbyteArray, jbyteArray, jbyteArray);
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_partial_sig_agg
- * Signature: (J[B[[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1partial_1sig_1agg
-  (JNIEnv *, jclass, jlong, jbyteArray, jobjectArray);
-
 #ifdef __cplusplus
 }
 #endif

jni/c/src/fr_acinq_secp256k1_Secp256k1CFunctions.c

@@ -8,7 +8,6 @@
 #include "include/secp256k1_ecdh.h"
 #include "include/secp256k1_recovery.h"
 #include "include/secp256k1_schnorrsig.h"
-#include "include/secp256k1_musig.h"
 #include "fr_acinq_secp256k1_Secp256k1CFunctions.h"
 
 #define SIG_FORMAT_UNKNOWN 0
@@ -24,26 +23,75 @@ void JNI_ThrowByName(JNIEnv *penv, const char *name, const char *msg)
     (*penv)->DeleteLocalRef(penv, cls);
   }
 }
+/**
+ * secp256k1 uses callbacks for errors that are either hw pbs or bugs in the calling library, for example
+ * passing parameters with values that are explicitly defined as illegal in the API, and should never be called for normal operations
+ * But if they are, default behaviour is to print an error to stderr and abort which is not what we want especially in mobile apps
+ * => we set up string pointers in every method, and custom callback that will set them to the message passed in by sec256k1's callbacks, which
+ * we turn into specific Sec256k1 exceptions
+*/
+#define SETUP_ERROR_CALLBACKS                                                               \
+  char *error_callback_message = NULL;                                                      \
+  char *illegal_callback_message = NULL;                                                    \
+  secp256k1_context_set_error_callback(ctx, my_error_callback_fn, &error_callback_message); \
+  secp256k1_context_set_illegal_callback(ctx, my_illegal_callback_fn, &illegal_callback_message);
 
-#define CHECKRESULT(errorcheck, message)                                       \
-  {                                                                            \
-    if (errorcheck)                                                            \
-    {                                                                          \
-      JNI_ThrowByName(penv, "fr/acinq/secp256k1/Secp256k1Exception", message); \
-      return 0;                                                                \
-    }                                                                          \
+#define CHECKRESULT(errorcheck, message)                                                                       \
+  {                                                                                                            \
+    if (error_callback_message)                                                                                \
+    {                                                                                                          \
+      JNI_ThrowByName(penv, "fr/acinq/secp256k1/Secp256k1ErrorCallbackException", error_callback_message);     \
+      return 0;                                                                                                \
+    }                                                                                                          \
+    if (illegal_callback_message)                                                                              \
+    {                                                                                                          \
+      JNI_ThrowByName(penv, "fr/acinq/secp256k1/Secp256k1IllegalCallbackException", illegal_callback_message); \
+      return 0;                                                                                                \
+    }                                                                                                          \
+    if (errorcheck)                                                                                            \
+    {                                                                                                          \
+      JNI_ThrowByName(penv, "fr/acinq/secp256k1/Secp256k1Exception", message);                                 \
+      return 0;                                                                                                \
+    }                                                                                                          \
   }
 
-#define CHECKRESULT1(errorcheck, message, dosomething)                         \
-  {                                                                            \
-    if (errorcheck)                                                            \
-    {                                                                          \
-      dosomething;                                                             \
-      JNI_ThrowByName(penv, "fr/acinq/secp256k1/Secp256k1Exception", message); \
-      return 0;                                                                \
-    }                                                                          \
+#define CHECKRESULT1(errorcheck, message, dosomething)                                                         \
+  {                                                                                                            \
+    if (error_callback_message)                                                                                \
+    {                                                                                                          \
+      dosomething;                                                                                             \
+      JNI_ThrowByName(penv, "fr/acinq/secp256k1/Secp256k1ErrorCallbackException", error_callback_message);     \
+      return 0;                                                                                                \
+    }                                                                                                          \
+    if (illegal_callback_message)                                                                              \
+    {                                                                                                          \
+      dosomething;                                                                                             \
+      JNI_ThrowByName(penv, "fr/acinq/secp256k1/Secp256k1IllegalCallbackException", illegal_callback_message); \
+      return 0;                                                                                                \
+    }                                                                                                          \
+    if (errorcheck)                                                                                            \
+    {                                                                                                          \
+      JNI_ThrowByName(penv, "fr/acinq/secp256k1/Secp256k1Exception", message);                                 \
+      return 0;                                                                                                \
+    }                                                                                                          \
   }
 
+void my_illegal_callback_fn(const char *str, void *data)
+{
+  if (data != NULL)
+  {
+    *(char **)data = str;
+  }
+}
+
+void my_error_callback_fn(const char *str, void *data)
+{
+  if (data != NULL)
+  {
+    *(char **)data = str;
+  }
+}
+
 /*
  * Class:     fr_acinq_bitcoin_Secp256k1Bindings
  * Method:    secp256k1_context_create
@@ -85,6 +133,8 @@ JNIEXPORT jint JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1ec
   if ((*penv)->GetArrayLength(penv, jseckey) != 32)
     return 0;
 
+  SETUP_ERROR_CALLBACKS
+
   seckey = (*penv)->GetByteArrayElements(penv, jseckey, 0);
   result = secp256k1_ec_seckey_verify(ctx, (unsigned char *)seckey);
   (*penv)->ReleaseByteArrayElements(penv, jseckey, seckey, 0);
@@ -109,6 +159,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jpubkey == NULL)
     return 0;
 
+  SETUP_ERROR_CALLBACKS
+
   size = (*penv)->GetArrayLength(penv, jpubkey);
   CHECKRESULT((size != 33) && (size != 65), "invalid public key size");
 
@@ -145,6 +197,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jctx == 0)
     return NULL;
 
+  SETUP_ERROR_CALLBACKS
+
   CHECKRESULT((*penv)->GetArrayLength(penv, jseckey) != 32, "secret key must be 32 bytes");
   seckey = (*penv)->GetByteArrayElements(penv, jseckey, 0);
   result = secp256k1_ec_pubkey_create(ctx, &pub, (unsigned char *)seckey);
@@ -179,6 +233,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jseckey == NULL)
     return NULL;
 
+  SETUP_ERROR_CALLBACKS
+
   CHECKRESULT((*penv)->GetArrayLength(penv, jseckey) != 32, "secret key must be 32 bytes");
   CHECKRESULT((*penv)->GetArrayLength(penv, jmsg) != 32, "message key must be 32 bytes");
   seckey = (*penv)->GetByteArrayElements(penv, jseckey, 0);
@@ -229,6 +285,8 @@ JNIEXPORT jint JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1ec
   if (jpubkey == NULL)
     return 0;
 
+  SETUP_ERROR_CALLBACKS
+
   sigSize = (*penv)->GetArrayLength(penv, jsig);
   int sigFormat = GetSignatureFormat(sigSize);
   CHECKRESULT(sigFormat == SIG_FORMAT_UNKNOWN, "invalid signature size");
@@ -286,6 +344,8 @@ JNIEXPORT jint JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1ec
   if (jsigout == NULL)
     return 0;
 
+  SETUP_ERROR_CALLBACKS
+
   size = (*penv)->GetArrayLength(penv, jsigin);
   sigFormat = GetSignatureFormat(size);
   CHECKRESULT(sigFormat == SIG_FORMAT_UNKNOWN, "invalid signature size");
@@ -329,6 +389,9 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
     return 0;
   if (jseckey == NULL)
     return 0;
+
+  SETUP_ERROR_CALLBACKS
+
   CHECKRESULT((*penv)->GetArrayLength(penv, jseckey) != 32, "secret key must be 32 bytes");
   seckey = (*penv)->GetByteArrayElements(penv, jseckey, 0);
   result = secp256k1_ec_seckey_negate(ctx, (unsigned char *)seckey);
@@ -355,6 +418,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jpubkey == NULL)
     return 0;
 
+  SETUP_ERROR_CALLBACKS
+
   size = (*penv)->GetArrayLength(penv, jpubkey);
   CHECKRESULT((size != 33) && (size != 65), "invalid public key size");
   pub = (*penv)->GetByteArrayElements(penv, jpubkey, 0);
@@ -392,6 +457,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jtweak == NULL)
     return NULL;
 
+  SETUP_ERROR_CALLBACKS
+
   CHECKRESULT((*penv)->GetArrayLength(penv, jseckey) != 32, "secret key must be 32 bytes");
   CHECKRESULT((*penv)->GetArrayLength(penv, jtweak) != 32, "tweak must be 32 bytes");
   seckey = (*penv)->GetByteArrayElements(penv, jseckey, 0);
@@ -423,6 +490,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jtweak == NULL)
     return NULL;
 
+  SETUP_ERROR_CALLBACKS
+
   size = (*penv)->GetArrayLength(penv, jpubkey);
   CHECKRESULT((size != 33) && (size != 65), "invalid public key size");
   CHECKRESULT((*penv)->GetArrayLength(penv, jtweak) != 32, "tweak must be 32 bytes");
@@ -464,6 +533,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jtweak == NULL)
     return NULL;
 
+  SETUP_ERROR_CALLBACKS
+
   CHECKRESULT((*penv)->GetArrayLength(penv, jseckey) != 32, "secret key must be 32 bytes");
   CHECKRESULT((*penv)->GetArrayLength(penv, jtweak) != 32, "tweak must be 32 bytes");
   seckey = (*penv)->GetByteArrayElements(penv, jseckey, 0);
@@ -495,6 +566,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jtweak == NULL)
     return NULL;
 
+  SETUP_ERROR_CALLBACKS
+
   size = (*penv)->GetArrayLength(penv, jpubkey);
   CHECKRESULT((size != 33) && (size != 65), "invalid public key size");
   CHECKRESULT((*penv)->GetArrayLength(penv, jtweak) != 32, "tweak must be 32 bytes");
@@ -549,9 +622,10 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jpubkeys == NULL)
     return NULL;
 
-    count = (*penv)->GetArrayLength(penv, jpubkeys);
-    CHECKRESULT(count < 1, "pubkey array cannot be empty")
-    pubkeys = calloc(count, sizeof(secp256k1_pubkey *));
+  SETUP_ERROR_CALLBACKS
+
+  count = (*penv)->GetArrayLength(penv, jpubkeys);
+  pubkeys = calloc(count, sizeof(secp256k1_pubkey *));
 
   for (i = 0; i < count; i++)
   {
@@ -598,6 +672,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jpubkey == NULL)
     return NULL;
 
+  SETUP_ERROR_CALLBACKS
+
   CHECKRESULT((*penv)->GetArrayLength(penv, jseckey) != 32, "invalid private key size");
 
   size = (*penv)->GetArrayLength(penv, jpubkey);
@@ -639,7 +715,11 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
     return NULL;
   if (jmsg == NULL)
     return NULL;
-  CHECKRESULT(recid < 0 || recid > 3, "invalid recovery id");
+
+  SETUP_ERROR_CALLBACKS
+
+  // we do not check that recid is valid, which should trigger our illegal callback handler to throw a Secp256k1IllegalCallbackException
+  // CHECKRESULT(recid < 0 || recid > 3, "recid must be 0, 1, 2 or 3")
 
   sigSize = (*penv)->GetArrayLength(penv, jsig);
   int sigFormat = GetSignatureFormat(sigSize);
@@ -687,7 +767,6 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   secp256k1_context *ctx = (secp256k1_context *)jctx;
   jbyte *sig;
   secp256k1_ecdsa_signature signature;
-  ;
   unsigned char der[73];
   size_t size;
   int result = 0;
@@ -696,6 +775,9 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
     return 0;
   if (jsig == NULL)
     return 0;
+
+  SETUP_ERROR_CALLBACKS
+
   CHECKRESULT((*penv)->GetArrayLength(penv, jsig) != 64, "invalid signature size");
 
   size = (*penv)->GetArrayLength(penv, jsig);
@@ -735,6 +817,8 @@ JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256
   if (jseckey == NULL)
     return NULL;
 
+  SETUP_ERROR_CALLBACKS
+
   CHECKRESULT((*penv)->GetArrayLength(penv, jseckey) != 32, "secret key must be 32 bytes");
   CHECKRESULT((*penv)->GetArrayLength(penv, jmsg) != 32, "message must be 32 bytes");
   if (jauxrand32 != 0)
@@ -788,6 +872,8 @@ JNIEXPORT jint JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1sc
   if (jpubkey == NULL)
     return 0;
 
+  SETUP_ERROR_CALLBACKS
+
   CHECKRESULT((*penv)->GetArrayLength(penv, jsig) != 64, "signature must be 64 bytes");
   CHECKRESULT((*penv)->GetArrayLength(penv, jpubkey) != 32, "public key must be 32 bytes");
   CHECKRESULT((*penv)->GetArrayLength(penv, jmsg) != 32, "message must be 32 bytes");
@@ -804,537 +890,3 @@ JNIEXPORT jint JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1sc
   (*penv)->ReleaseByteArrayElements(penv, jmsg, msg, 0);
   return result;
 }
-
-static void copy_bytes_from_java(JNIEnv *penv, jbyteArray source, size_t size, unsigned char *dest)
-{
-  jbyte *ptr = NULL;
-  if (source == NULL)
-    return; // nothing to do
-  ptr = (*penv)->GetByteArrayElements(penv, source, 0);
-  memcpy(dest, ptr, size);
-  (*penv)->ReleaseByteArrayElements(penv, source, ptr, 0);
-}
-
-static void copy_bytes_to_java(JNIEnv *penv, jbyteArray dest, size_t size, unsigned char *source)
-{
-  jbyte *ptr = (*penv)->GetByteArrayElements(penv, dest, 0);
-  memcpy(ptr, source, size);
-  (*penv)->ReleaseByteArrayElements(penv, dest, ptr, 0);
-}
-
-// session_id32: ByteArray, seckey: ByteArray?, pubkey: ByteArray, msg32: ByteArray?, keyagg_cache: ByteArray?, extra_input32: ByteArray?
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_nonce_gen
- * Signature: (J[B[B[B[B[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1nonce_1gen(JNIEnv *penv, jclass clazz, jlong jctx, jbyteArray jsession_id32, jbyteArray jseckey, jbyteArray jpubkey, jbyteArray jmsg32, jbyteArray jkeyaggcache, jbyteArray jextra_input32)
-{
-  secp256k1_context *ctx = (secp256k1_context *)jctx;
-  int result = 0;
-  size_t size;
-  secp256k1_musig_pubnonce pubnonce;
-  secp256k1_musig_secnonce secnonce;
-  unsigned char session_id32[32];
-  jbyte *pubkey_ptr;
-  secp256k1_pubkey pubkey;
-  unsigned char seckey[32];
-  unsigned char msg32[32];
-  secp256k1_musig_keyagg_cache keyaggcache;
-  unsigned char extra_input32[32];
-  jbyteArray jnonce;
-  jbyte *nonce_ptr = NULL;
-  unsigned char nonce[fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SECRET_NONCE_SIZE + fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_PUBLIC_NONCE_SIZE];
-
-  if (jctx == 0)
-    return NULL;
-
-  if (jsession_id32 == 0)
-    return NULL;
-  size = (*penv)->GetArrayLength(penv, jsession_id32);
-  CHECKRESULT(size != 32, "invalid session_id size");
-  copy_bytes_from_java(penv, jsession_id32, size, session_id32);
-
-  if (jseckey != NULL)
-  {
-    size = (*penv)->GetArrayLength(penv, jseckey);
-    CHECKRESULT(size != 32, "invalid session_id size");
-    copy_bytes_from_java(penv, jseckey, size, seckey);
-  }
-
-  if (jpubkey == NULL)
-    return NULL;
-  size = (*penv)->GetArrayLength(penv, jpubkey);
-  CHECKRESULT((size != 33) && (size != 65), "invalid public key size");
-  pubkey_ptr = (*penv)->GetByteArrayElements(penv, jpubkey, 0);
-  result = secp256k1_ec_pubkey_parse(ctx, &pubkey, (unsigned char *)pubkey_ptr, size);
-  (*penv)->ReleaseByteArrayElements(penv, jpubkey, pubkey_ptr, 0);
-  CHECKRESULT(!result, "secp256k1_ec_pubkey_parse failed");
-
-  if (jmsg32 != NULL)
-  {
-    size = (*penv)->GetArrayLength(penv, jmsg32);
-    CHECKRESULT(size != 32, "invalid message size");
-    copy_bytes_from_java(penv, jmsg32, size, msg32);
-  }
-
-  if (jkeyaggcache != NULL)
-  {
-    size = (*penv)->GetArrayLength(penv, jkeyaggcache);
-    CHECKRESULT(size != sizeof(secp256k1_musig_keyagg_cache), "invalid keyagg cache size");
-    copy_bytes_from_java(penv, jkeyaggcache, size, keyaggcache.data);
-  }
-
-  if (jextra_input32 != NULL)
-  {
-    size = (*penv)->GetArrayLength(penv, jextra_input32);
-    CHECKRESULT(size != 32, "invalid extra input size");
-    copy_bytes_from_java(penv, jextra_input32, size, extra_input32);
-  }
-
-  result = secp256k1_musig_nonce_gen(ctx, &secnonce, &pubnonce, session_id32,
-                                     jseckey == NULL ? NULL : seckey, &pubkey,
-                                     jmsg32 == NULL ? NULL : msg32, jkeyaggcache == NULL ? NULL : &keyaggcache, jextra_input32 == NULL ? NULL : extra_input32);
-  CHECKRESULT(!result, "secp256k1_musig_nonce_gen failed");
-
-  memcpy(nonce, secnonce.data, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SECRET_NONCE_SIZE);
-  result = secp256k1_musig_pubnonce_serialize(ctx, nonce + fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SECRET_NONCE_SIZE, &pubnonce);
-  CHECKRESULT(!result, "secp256k1_musig_pubnonce_serialize failed");
-
-  jnonce = (*penv)->NewByteArray(penv, sizeof(nonce));
-  nonce_ptr = (*penv)->GetByteArrayElements(penv, jnonce, 0);
-  memcpy(nonce_ptr, nonce, sizeof(nonce));
-  (*penv)->ReleaseByteArrayElements(penv, jnonce, nonce_ptr, 0);
-  return jnonce;
-}
-
-void free_nonces(secp256k1_musig_pubnonce **nonces, size_t count)
-{
-  size_t i;
-  for (i = 0; i < count; i++)
-  {
-    if (nonces[i] != NULL)
-      free(nonces[i]);
-  }
-  free(nonces);
-}
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_nonce_agg
- * Signature: (J[[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1nonce_1agg(JNIEnv *penv, jclass clazz, jlong jctx, jobjectArray jnonces)
-{
-  secp256k1_context *ctx = (secp256k1_context *)jctx;
-  jbyte *in66;
-  secp256k1_musig_pubnonce **pubnonces;
-  secp256k1_musig_aggnonce combined;
-  jbyteArray jnonce;
-  size_t size, count;
-  size_t i;
-  int result = 0;
-
-  if (jctx == 0)
-    return NULL;
-  if (jnonces == NULL)
-    return NULL;
-
-  count = (*penv)->GetArrayLength(penv, jnonces);
-  CHECKRESULT(count <= 0, "public nonces count cannot be 0");
-
-  pubnonces = calloc(count, sizeof(secp256k1_musig_pubnonce *));
-
-  for (i = 0; i < count; i++)
-  {
-    pubnonces[i] = calloc(1, sizeof(secp256k1_musig_pubnonce));
-    jnonce = (jbyteArray)(*penv)->GetObjectArrayElement(penv, jnonces, i);
-    size = (*penv)->GetArrayLength(penv, jnonce);
-    CHECKRESULT1(size != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_PUBLIC_NONCE_SIZE, "invalid public nonce size", free_nonces(pubnonces, count));
-    in66 = (*penv)->GetByteArrayElements(penv, jnonce, 0);
-    result = secp256k1_musig_pubnonce_parse(ctx, pubnonces[i], (unsigned char *)in66);
-    (*penv)->ReleaseByteArrayElements(penv, jnonce, in66, 0);
-    CHECKRESULT1(!result, "secp256k1_musig_pubnonce_parse failed", free_nonces(pubnonces, count));
-  }
-  result = secp256k1_musig_nonce_agg(ctx, &combined, (const secp256k1_musig_pubnonce *const *)pubnonces, count);
-  free_nonces(pubnonces, count);
-  CHECKRESULT(!result, "secp256k1_musig_nonce_agg failed");
-
-  jnonce = (*penv)->NewByteArray(penv, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_PUBLIC_NONCE_SIZE);
-  in66 = (*penv)->GetByteArrayElements(penv, jnonce, 0);
-  result = secp256k1_musig_aggnonce_serialize(ctx, (unsigned char *)in66, &combined);
-  (*penv)->ReleaseByteArrayElements(penv, jnonce, in66, 0);
-  CHECKRESULT(!result, "secp256k1_musig_aggnonce_serialize failed");
-  return jnonce;
-}
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_pubkey_agg
- * Signature: (J[[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1pubkey_1agg(JNIEnv *penv, jclass clazz, jlong jctx, jobjectArray jpubkeys, jbyteArray jkeyaggcache)
-{
-  secp256k1_context *ctx = (secp256k1_context *)jctx;
-  jbyte *pub;
-  secp256k1_pubkey **pubkeys;
-  secp256k1_xonly_pubkey combined;
-  secp256k1_musig_keyagg_cache keyaggcache;
-  jbyteArray jpubkey;
-  size_t size, count;
-  size_t i;
-  int result = 0;
-
-  if (jctx == 0)
-    return NULL;
-  if (jpubkeys == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jpubkeys) <= 0, "pubkeys count cannot be 0");
-
-  if (jkeyaggcache != NULL)
-  {
-    size = (*penv)->GetArrayLength(penv, jkeyaggcache);
-    CHECKRESULT(size != sizeof(secp256k1_musig_keyagg_cache), "invalid keyagg cache size");
-    copy_bytes_from_java(penv, jkeyaggcache, size, keyaggcache.data);
-  }
-
-  count = (*penv)->GetArrayLength(penv, jpubkeys);
-  pubkeys = calloc(count, sizeof(secp256k1_pubkey *));
-
-  for (i = 0; i < count; i++)
-  {
-    pubkeys[i] = calloc(1, sizeof(secp256k1_pubkey));
-    jpubkey = (jbyteArray)(*penv)->GetObjectArrayElement(penv, jpubkeys, i);
-    size = (*penv)->GetArrayLength(penv, jpubkey);
-    CHECKRESULT1((size != 33) && (size != 65), "invalid public key size", free_pubkeys(pubkeys, count));
-    pub = (*penv)->GetByteArrayElements(penv, jpubkey, 0);
-    result = secp256k1_ec_pubkey_parse(ctx, pubkeys[i], (unsigned char *)pub, size);
-    (*penv)->ReleaseByteArrayElements(penv, jpubkey, pub, 0);
-    CHECKRESULT1(!result, "secp256k1_ec_pubkey_parse failed", free_pubkeys(pubkeys, count));
-  }
-  result = secp256k1_musig_pubkey_agg(ctx, &combined, jkeyaggcache == NULL ? NULL : &keyaggcache, (const secp256k1_pubkey *const *)pubkeys, count);
-  free_pubkeys(pubkeys, count);
-  CHECKRESULT(!result, "secp256k1_musig_pubkey_agg failed");
-
-  size = 32;
-  jpubkey = (*penv)->NewByteArray(penv, 32);
-  pub = (*penv)->GetByteArrayElements(penv, jpubkey, 0);
-  result = secp256k1_xonly_pubkey_serialize(ctx, (unsigned char *)pub, &combined);
-  (*penv)->ReleaseByteArrayElements(penv, jpubkey, pub, 0);
-  CHECKRESULT(!result, "secp256k1_xonly_pubkey_serialize failed");
-
-  if (jkeyaggcache != NULL)
-  {
-    pub = (*penv)->GetByteArrayElements(penv, jkeyaggcache, 0);
-    memcpy(pub, keyaggcache.data, sizeof(secp256k1_musig_keyagg_cache));
-    (*penv)->ReleaseByteArrayElements(penv, jkeyaggcache, pub, 0);
-  }
-  return jpubkey;
-}
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_pubkey_ec_tweak_add
- * Signature: (J[B[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1pubkey_1ec_1tweak_1add(JNIEnv *penv, jclass clazz, jlong jctx, jbyteArray jkeyaggcache, jbyteArray jtweak32)
-{
-  secp256k1_context *ctx = (secp256k1_context *)jctx;
-  jbyte *tweak32, *pub;
-  secp256k1_pubkey pubkey;
-  secp256k1_musig_keyagg_cache keyaggcache;
-  jbyteArray jpubkey;
-  size_t size;
-  int result = 0;
-
-  if (jctx == 0)
-    return NULL;
-  if (jkeyaggcache == NULL)
-    return NULL;
-  size = (*penv)->GetArrayLength(penv, jkeyaggcache);
-  CHECKRESULT(size != sizeof(secp256k1_musig_keyagg_cache), "invalid keyagg cache size");
-  copy_bytes_from_java(penv, jkeyaggcache, size, keyaggcache.data);
-  if (jtweak32 == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jtweak32) != 32, "tweak must be 32 bytes");
-  tweak32 = (*penv)->GetByteArrayElements(penv, jtweak32, 0);
-
-  result = secp256k1_musig_pubkey_ec_tweak_add(ctx, &pubkey, &keyaggcache, tweak32);
-  (*penv)->ReleaseByteArrayElements(penv, jtweak32, tweak32, 0);
-  CHECKRESULT(!result, "secp256k1_musig_pubkey_ec_tweak_add failed");
-
-  jpubkey = (*penv)->NewByteArray(penv, 65);
-  pub = (*penv)->GetByteArrayElements(penv, jpubkey, 0);
-  size = 65;
-  result = secp256k1_ec_pubkey_serialize(ctx, pub, &size, &pubkey, SECP256K1_EC_UNCOMPRESSED);
-  (*penv)->ReleaseByteArrayElements(penv, jpubkey, pub, 0);
-  CHECKRESULT(!result, "secp256k1_ec_pubkey_serialize failed");
-
-  pub = (*penv)->GetByteArrayElements(penv, jkeyaggcache, 0);
-  memcpy(pub, keyaggcache.data, sizeof(secp256k1_musig_keyagg_cache));
-  (*penv)->ReleaseByteArrayElements(penv, jkeyaggcache, pub, 0);
-
-  return jpubkey;
-}
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_pubkey_xonly_tweak_add
- * Signature: (J[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1pubkey_1xonly_1tweak_1add(JNIEnv *penv, jclass clazz, jlong jctx, jbyteArray jkeyaggcache, jbyteArray jtweak32)
-{
-  secp256k1_context *ctx = (secp256k1_context *)jctx;
-  jbyte *tweak32, *pub;
-  secp256k1_pubkey pubkey;
-  secp256k1_musig_keyagg_cache keyaggcache;
-  jbyteArray jpubkey;
-  size_t size;
-  int result = 0;
-
-  if (jctx == 0)
-    return NULL;
-  if (jkeyaggcache == NULL)
-    return NULL;
-  size = (*penv)->GetArrayLength(penv, jkeyaggcache);
-  CHECKRESULT(size != sizeof(secp256k1_musig_keyagg_cache), "invalid keyagg cache size");
-  copy_bytes_from_java(penv, jkeyaggcache, size, keyaggcache.data);
-  if (jtweak32 == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jtweak32) != 32, "tweak must be 32 bytes");
-  tweak32 = (*penv)->GetByteArrayElements(penv, jtweak32, 0);
-
-  result = secp256k1_musig_pubkey_xonly_tweak_add(ctx, &pubkey, &keyaggcache, tweak32);
-  (*penv)->ReleaseByteArrayElements(penv, jtweak32, tweak32, 0);
-  CHECKRESULT(!result, "secp256k1_musig_pubkey_xonly_tweak_add failed");
-
-  jpubkey = (*penv)->NewByteArray(penv, 65);
-  pub = (*penv)->GetByteArrayElements(penv, jpubkey, 0);
-  size = 65;
-  result = secp256k1_ec_pubkey_serialize(ctx, pub, &size, &pubkey, SECP256K1_EC_UNCOMPRESSED);
-  (*penv)->ReleaseByteArrayElements(penv, jpubkey, pub, 0);
-  CHECKRESULT(!result, "secp256k1_ec_pubkey_serialize failed");
-
-  pub = (*penv)->GetByteArrayElements(penv, jkeyaggcache, 0);
-  memcpy(pub, keyaggcache.data, sizeof(secp256k1_musig_keyagg_cache));
-  (*penv)->ReleaseByteArrayElements(penv, jkeyaggcache, pub, 0);
-
-  return jpubkey;
-}
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_nonce_process
- * Signature: (J[B[B[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1nonce_1process(JNIEnv *penv, jclass clazz, jlong jctx, jbyteArray jaggnonce, jbyteArray jmsg32, jbyteArray jkeyaggcache, jbyteArray jadaptor)
-{
-  secp256k1_context *ctx = (secp256k1_context *)jctx;
-  secp256k1_musig_keyagg_cache keyaggcache;
-  secp256k1_musig_aggnonce aggnonce;
-  secp256k1_musig_session session;
-  unsigned char msg32[32];
-  jbyteArray jsession;
-  jbyte *ptr;
-  size_t size;
-  int result = 0;
-
-  if (jctx == 0)
-    return NULL;
-  if (jaggnonce == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jaggnonce) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_PUBLIC_NONCE_SIZE, "invalid nonce size");
-  if (jmsg32 == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jmsg32) != 32, "invalid message size");
-  if (jkeyaggcache == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jkeyaggcache) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_KEYAGG_CACHE_SIZE, "invalid nonce size");
-
-  ptr = (*penv)->GetByteArrayElements(penv, jaggnonce, 0);
-  result = secp256k1_musig_aggnonce_parse(ctx, &aggnonce, ptr);
-  (*penv)->ReleaseByteArrayElements(penv, jaggnonce, ptr, 0);
-  CHECKRESULT(!result, "secp256k1_musig_aggnonce_parse failed");
-
-  copy_bytes_from_java(penv, jmsg32, 32, msg32);
-  copy_bytes_from_java(penv, jkeyaggcache, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_KEYAGG_CACHE_SIZE, keyaggcache.data);
-
-  result = secp256k1_musig_nonce_process(ctx, &session, &aggnonce, msg32, &keyaggcache);
-  CHECKRESULT(!result, "secp256k1_musig_nonce_process failed");
-
-  jsession = (*penv)->NewByteArray(penv, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE);
-  copy_bytes_to_java(penv, jsession, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE, session.data);
-  return jsession;
-}
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_partial_sign
- * Signature: (J[B[B[B[B[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1partial_1sign(JNIEnv *penv, jclass clazz, jlong jctx, jbyteArray jsecnonce, jbyteArray jprivkey, jbyteArray jkeyaggcache, jbyteArray jsession)
-{
-  secp256k1_context *ctx = (secp256k1_context *)jctx;
-  secp256k1_musig_partial_sig psig;
-  secp256k1_musig_secnonce secnonce;
-  unsigned char seckey[32];
-  secp256k1_keypair keypair;
-  secp256k1_musig_keyagg_cache keyaggcache;
-  secp256k1_musig_session session;
-  jbyteArray jpsig;
-  jbyte *ptr;
-  int result = 0;
-
-  if (jctx == 0)
-    return NULL;
-  if (jsecnonce == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jsecnonce) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SECRET_NONCE_SIZE, "invalid secret nonce size");
-  if (jprivkey == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jprivkey) != 32, "invalid private key size");
-  if (jkeyaggcache == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jkeyaggcache) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_KEYAGG_CACHE_SIZE, "invalid cache size");
-  if (jsession == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jsession) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE, "invalid session size");
-
-  copy_bytes_from_java(penv, jsecnonce, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SECRET_NONCE_SIZE, secnonce.data);
-
-  copy_bytes_from_java(penv, jprivkey, 32, seckey);
-  result = secp256k1_keypair_create(ctx, &keypair, seckey);
-  CHECKRESULT(!result, "secp256k1_keypair_create failed");
-
-  copy_bytes_from_java(penv, jkeyaggcache, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_KEYAGG_CACHE_SIZE, keyaggcache.data);
-  copy_bytes_from_java(penv, jsession, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE, session.data);
-
-  result = secp256k1_musig_partial_sign(ctx, &psig, &secnonce, &keypair, &keyaggcache, &session);
-  CHECKRESULT(!result, "secp256k1_musig_partial_sign failed");
-
-  result = secp256k1_musig_partial_sig_serialize(ctx, seckey, &psig);
-  CHECKRESULT(!result, "secp256k1_musig_partial_sig_serialize failed");
-
-  jpsig = (*penv)->NewByteArray(penv, 32);
-  copy_bytes_to_java(penv, jpsig, 32, seckey);
-  return jpsig;
-}
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_partial_sig_verify
- * Signature: (J[B[B[B[B[B)I
- */
-JNIEXPORT jint JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1partial_1sig_1verify(JNIEnv *penv, jclass clazz, jlong jctx, jbyteArray jpsig, jbyteArray jpubnonce, jbyteArray jpubkey, jbyteArray jkeyaggcache, jbyteArray jsession)
-{
-  secp256k1_context *ctx = (secp256k1_context *)jctx;
-  secp256k1_musig_partial_sig psig;
-  secp256k1_musig_pubnonce pubnonce;
-  secp256k1_pubkey pubkey;
-  secp256k1_musig_keyagg_cache keyaggcache;
-  secp256k1_musig_session session;
-  jbyte *ptr;
-  int result = 0;
-
-  if (jctx == 0)
-    return 0;
-  if (jpsig == NULL)
-    return 0;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jpsig) != 32, "invalid partial signature size");
-  if (jpubnonce == NULL)
-    return 0;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jpubnonce) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_PUBLIC_NONCE_SIZE, "invalid public nonce size");
-  if (jpubkey == NULL)
-    return 0;
-  CHECKRESULT(((*penv)->GetArrayLength(penv, jpubkey) != 33) && ((*penv)->GetArrayLength(penv, jpubkey) != 65), "invalid public key size");
-  if (jkeyaggcache == NULL)
-    return 0;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jkeyaggcache) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_KEYAGG_CACHE_SIZE, "invalid cache size");
-  if (jsession == NULL)
-    return 0;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jsession) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE, "invalid session size");
-
-  ptr = (*penv)->GetByteArrayElements(penv, jpsig, 0);
-  result = secp256k1_musig_partial_sig_parse(ctx, &psig, ptr);
-  (*penv)->ReleaseByteArrayElements(penv, jpsig, ptr, 0);
-  CHECKRESULT(!result, "secp256k1_musig_partial_sig_parse failed");
-
-  ptr = (*penv)->GetByteArrayElements(penv, jpubnonce, 0);
-  result = secp256k1_musig_pubnonce_parse(ctx, &pubnonce, ptr);
-  (*penv)->ReleaseByteArrayElements(penv, jpubnonce, ptr, 0);
-  CHECKRESULT(!result, "secp256k1_musig_pubnonce_parse failed");
-
-  ptr = (*penv)->GetByteArrayElements(penv, jpubkey, 0);
-  result = secp256k1_ec_pubkey_parse(ctx, &pubkey, ptr, (*penv)->GetArrayLength(penv, jpubkey));
-  (*penv)->ReleaseByteArrayElements(penv, jpubkey, ptr, 0);
-  CHECKRESULT(!result, "secp256k1_musig_pubkey_parse failed");
-
-  copy_bytes_from_java(penv, jkeyaggcache, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_KEYAGG_CACHE_SIZE, keyaggcache.data);
-  copy_bytes_from_java(penv, jsession, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE, session.data);
-
-  result = secp256k1_musig_partial_sig_verify(ctx, &psig, &pubnonce, &pubkey, &keyaggcache, &session);
-  return result;
-}
-
-void free_partial_sigs(secp256k1_musig_partial_sig **psigs, size_t count)
-{
-  size_t i;
-  for (i = 0; i < count; i++)
-  {
-    if (psigs[i] != NULL)
-      free(psigs[i]);
-  }
-  free(psigs);
-}
-
-/*
- * Class:     fr_acinq_secp256k1_Secp256k1CFunctions
- * Method:    secp256k1_musig_partial_sig_agg
- * Signature: (J[B[[B)[B
- */
-JNIEXPORT jbyteArray JNICALL Java_fr_acinq_secp256k1_Secp256k1CFunctions_secp256k1_1musig_1partial_1sig_1agg(JNIEnv *penv, jclass clazz, jlong jctx, jbyteArray jsession, jobjectArray jpsigs)
-{
-  secp256k1_context *ctx = (secp256k1_context *)jctx;
-  secp256k1_musig_session session;
-  secp256k1_musig_partial_sig **psigs;
-  unsigned char sig64[64];
-  secp256k1_musig_keyagg_cache keyaggcache;
-  jbyteArray jpsig;
-  jbyte *ptr;
-  size_t size, count;
-  size_t i;
-  int result = 0;
-
-  if (jctx == 0)
-    return NULL;
-  if (jsession == NULL)
-    return NULL;
-  CHECKRESULT((*penv)->GetArrayLength(penv, jsession) != fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE, "invalid session size");
-  copy_bytes_from_java(penv, jsession, fr_acinq_secp256k1_Secp256k1CFunctions_SECP256K1_MUSIG_SESSION_SIZE, session.data);
-  if (jpsigs == NULL)
-    return NULL;
-
-  count = (*penv)->GetArrayLength(penv, jpsigs);
-  CHECKRESULT(count <= 0, "partial sigs count cannot be 0");
-
-  psigs = calloc(count, sizeof(secp256k1_musig_partial_sig *));
-
-  for (i = 0; i < count; i++)
-  {
-    psigs[i] = calloc(1, sizeof(secp256k1_musig_partial_sig));
-    jpsig = (jbyteArray)(*penv)->GetObjectArrayElement(penv, jpsigs, i);
-    size = (*penv)->GetArrayLength(penv, jpsig);
-    CHECKRESULT1(size != 32, "invalid partial signature size", free_partial_sigs(psigs, count));
-    ptr = (*penv)->GetByteArrayElements(penv, jpsig, 0);
-    result = secp256k1_musig_partial_sig_parse(ctx, psigs[i], (unsigned char *)ptr);
-    (*penv)->ReleaseByteArrayElements(penv, jpsig, ptr, 0);
-    CHECKRESULT1(!result, "secp256k1_musig_partial_sig_parse failed", free_partial_sigs(psigs, count));
-  }
-  result = secp256k1_musig_partial_sig_agg(ctx, sig64, &session, (const secp256k1_musig_partial_sig *const *)psigs, count);
-  free_partial_sigs(psigs, count);
-  CHECKRESULT(!result, "secp256k1_musig_pubkey_agg failed");
-
-  jpsig = (*penv)->NewByteArray(penv, 64);
-  copy_bytes_to_java(penv, jpsig, 64, sig64);
-  return jpsig;
-}

jni/src/main/java/fr/acinq/secp256k1/Secp256k1CFunctions.java

@@ -29,14 +29,6 @@ public class Secp256k1CFunctions {
     public static final int SECP256K1_EC_COMPRESSED = (SECP256K1_FLAGS_TYPE_COMPRESSION | SECP256K1_FLAGS_BIT_COMPRESSION);
     public static final int SECP256K1_EC_UNCOMPRESSED = (SECP256K1_FLAGS_TYPE_COMPRESSION);
 
-    public static final int SECP256K1_MUSIG_PUBLIC_NONCE_SIZE = 66;
-
-    public static final int SECP256K1_MUSIG_SECRET_NONCE_SIZE = 132;
-
-    public static final int SECP256K1_MUSIG_KEYAGG_CACHE_SIZE = 197;
-
-    public static final int SECP256K1_MUSIG_SESSION_SIZE = 133;
-
     public static native long secp256k1_context_create(int flags);
 
     public static native void secp256k1_context_destroy(long ctx);
@@ -76,22 +68,4 @@ public class Secp256k1CFunctions {
     public static native byte[] secp256k1_schnorrsig_sign(long ctx, byte[] msg, byte[] seckey, byte[] aux_rand32);
 
     public static native int secp256k1_schnorrsig_verify(long ctx, byte[] sig, byte[] msg, byte[] pubkey);
-
-    public static native byte[] secp256k1_musig_nonce_gen(long ctx, byte[] session_id32, byte[] seckey, byte[] pubkey, byte[] msg32, byte[] keyagg_cache, byte[] extra_input32);
-
-    public static native byte[] secp256k1_musig_nonce_agg(long ctx, byte[][] nonces);
-
-    public static native byte[] secp256k1_musig_pubkey_agg(long ctx, byte[][] pubkeys, byte[] keyagg_cache);
-
-    public static native byte[] secp256k1_musig_pubkey_ec_tweak_add(long ctx, byte[] keyagg_cache, byte[] tweak32);
-
-    public static native byte[] secp256k1_musig_pubkey_xonly_tweak_add(long ctx, byte[] keyagg_cache, byte[] tweak32);
-
-    public static native byte[] secp256k1_musig_nonce_process(long ctx, byte[] aggnonce, byte[] msg32, byte[] keyagg_cache, byte[] adaptor);
-
-    public static native byte[] secp256k1_musig_partial_sign(long ctx, byte[] secnonce, byte[] privkey, byte[] keyagg_cache, byte[] session);
-
-    public static native int secp256k1_musig_partial_sig_verify(long ctx, byte[] psig, byte[] pubnonce, byte[] pubkey, byte[] keyagg_cache, byte[] session);
-
-    public static native byte[] secp256k1_musig_partial_sig_agg(long ctx, byte[] session, byte[][]  psigs);
 }

jni/src/main/kotlin/fr/acinq/secp256k1/NativeSecp256k1.kt

@@ -92,42 +92,6 @@ public object NativeSecp256k1 : Secp256k1 {
         return Secp256k1CFunctions.secp256k1_schnorrsig_sign(Secp256k1Context.getContext(), data, sec, auxrand32)
     }
 
-    override fun musigNonceGen(session_id32: ByteArray, seckey: ByteArray?, pubkey: ByteArray, msg32: ByteArray?, keyagg_cache: ByteArray?, extra_input32: ByteArray?): ByteArray {
-        return Secp256k1CFunctions.secp256k1_musig_nonce_gen(Secp256k1Context.getContext(), session_id32, seckey, pubkey, msg32, keyagg_cache, extra_input32)
-    }
-
-    override fun musigNonceAgg(pubnonces: Array<ByteArray>): ByteArray {
-        return Secp256k1CFunctions.secp256k1_musig_nonce_agg(Secp256k1Context.getContext(), pubnonces)
-    }
-
-    override fun musigPubkeyAdd(pubkeys: Array<ByteArray>, keyagg_cache: ByteArray?): ByteArray {
-        return Secp256k1CFunctions.secp256k1_musig_pubkey_agg(Secp256k1Context.getContext(), pubkeys, keyagg_cache)
-    }
-
-    override fun musigPubkeyTweakAdd(keyagg_cache: ByteArray, tweak32: ByteArray): ByteArray {
-        return Secp256k1CFunctions.secp256k1_musig_pubkey_ec_tweak_add(Secp256k1Context.getContext(), keyagg_cache, tweak32)
-    }
-
-    override fun musigPubkeyXonlyTweakAdd(keyagg_cache: ByteArray, tweak32: ByteArray): ByteArray {
-        return Secp256k1CFunctions.secp256k1_musig_pubkey_xonly_tweak_add(Secp256k1Context.getContext(), keyagg_cache, tweak32)
-    }
-
-    override fun musigNonceProcess(aggnonce: ByteArray, msg32: ByteArray, keyagg_cache: ByteArray, adaptor: ByteArray?): ByteArray {
-        return Secp256k1CFunctions.secp256k1_musig_nonce_process(Secp256k1Context.getContext(), aggnonce, msg32, keyagg_cache, adaptor)
-    }
-
-    override fun musigPartialSign(secnonce: ByteArray, privkey: ByteArray, keyagg_cache: ByteArray, session: ByteArray): ByteArray {
-        return Secp256k1CFunctions.secp256k1_musig_partial_sign(Secp256k1Context.getContext(), secnonce, privkey, keyagg_cache, session)
-    }
-
-    override fun musigPartialSigVerify(psig: ByteArray, pubnonce: ByteArray, pubkey: ByteArray, keyagg_cache: ByteArray, session: ByteArray): Int {
-        return Secp256k1CFunctions.secp256k1_musig_partial_sig_verify(Secp256k1Context.getContext(), psig, pubnonce, pubkey, keyagg_cache, session)
-    }
-
-    override fun musigPartialSigAgg(session: ByteArray, psigs: Array<ByteArray>): ByteArray {
-        return Secp256k1CFunctions.secp256k1_musig_partial_sig_agg(Secp256k1Context.getContext(), session, psigs)
-    }
-
     override fun cleanup() {
         return Secp256k1CFunctions.secp256k1_context_destroy(Secp256k1Context.getContext())
     }

native/build-android.sh

@@ -33,7 +33,7 @@ export STRIP=$ANDROID_NDK/toolchains/llvm/prebuilt/$TOOLCHAIN/bin/llvm-strip
 cd secp256k1
 
 ./autogen.sh
-./configure CFLAGS=-fpic --host=$TARGET --enable-experimental --enable-module_ecdh --enable-module-recovery --enable-module-schnorrsig --enable-module-musig --enable-benchmark=no --enable-shared=no --enable-exhaustive-tests=no --enable-tests=no
+./configure CFLAGS=-fpic --host=$TARGET --enable-experimental --enable-module_ecdh --enable-module-recovery --enable-module-schnorrsig --enable-benchmark=no --enable-shared=no --enable-exhaustive-tests=no --enable-tests=no
 make clean
 make
 

native/build-ios.sh

@@ -6,13 +6,10 @@ cp xconfigure.sh secp256k1
 cd secp256k1
 
 ./autogen.sh
-sh xconfigure.sh --enable-experimental --enable-module_ecdh --enable-module-recovery --enable-module-schnorrsig --enable-module-musig --enable-benchmark=no --enable-shared=no --enable-exhaustive-tests=no --enable-tests=no
+sh xconfigure.sh --enable-experimental --enable-module_ecdh --enable-module-recovery --enable-module-schnorrsig --enable-benchmark=no --enable-shared=no --enable-exhaustive-tests=no --enable-tests=no
 
 mkdir -p ../build/ios
-cp -v _build/universal/ios/* ../build/ios/
-
-mkdir -p ../build/iosSimulatorArm64
-cp -v _build/universal/iosSimulatorArm64/* ../build/iosSimulatorArm64/
+cp -v _build/universal/* ../build/ios/
 
 rm -rf _build
 make clean

native/build.sh

@@ -23,7 +23,7 @@ else
 fi
 
 ./autogen.sh
-./configure $CONF_OPTS --enable-experimental --enable-module_ecdh --enable-module-recovery --enable-module-schnorrsig --enable-module-musig --enable-benchmark=no --enable-shared=no --enable-exhaustive-tests=no --enable-tests=no
+./configure $CONF_OPTS --enable-experimental --enable-module_ecdh --enable-module-recovery --enable-module-schnorrsig --enable-benchmark=no --enable-shared=no --enable-exhaustive-tests=no --enable-tests=no
 make clean
 make
 

native/xconfigure.sh

@@ -69,22 +69,9 @@ HOST_FLAGS="${ARCH_FLAGS} -mios-simulator-version-min=${MIN_IOS_VERSION} -isysro
 CHOST="x86_64-apple-darwin"
 Build "$@"
 
-## Build for iphone M1/M2/Mx simulators
-SDK="iphonesimulator"
-PLATFORM="arm64-sim"
-PLATFORM_SIM_ARM=${PLATFORM}
-ARCH_FLAGS="-arch arm64"
-HOST_FLAGS="${ARCH_FLAGS} -mios-simulator-version-min=${MIN_IOS_VERSION} -isysroot $(xcrun --sdk ${SDK} --show-sdk-path)"
-CHOST="arm-apple-darwin"
-Build "$@"
-
 # Create universal binary
 cd "${PLATFORMS}/${PLATFORM_ARM}/lib"
 LIB_NAME=`find . -iname *.a`
 cd -
-mkdir -p "${UNIVERSAL}/ios" &> /dev/null
-mkdir -p "${UNIVERSAL}/iosSimulatorArm64" &> /dev/null
-lipo -create -output "${UNIVERSAL}/ios/${LIB_NAME}" "${PLATFORMS}/${PLATFORM_ARM}/lib/${LIB_NAME}" "${PLATFORMS}/${PLATFORM_ISIM}/lib/${LIB_NAME}"
-
-# create a specific library for arm64 simulator: it cannot be included in the lib above which already contains an arm64 lib
-lipo -create -output "${UNIVERSAL}/iosSimulatorArm64/${LIB_NAME}" "${PLATFORMS}/${PLATFORM_SIM_ARM}/lib/${LIB_NAME}"
+mkdir -p "${UNIVERSAL}" &> /dev/null
+lipo -create -output "${UNIVERSAL}/${LIB_NAME}" "${PLATFORMS}/${PLATFORM_ARM}/lib/${LIB_NAME}" "${PLATFORMS}/${PLATFORM_ISIM}/lib/${LIB_NAME}"

publishing/secp256k1-kmp-snapshot-deploy.sh

@@ -21,9 +21,9 @@ mvn deploy:deploy-file -DrepositoryId=ossrh -Durl=https://oss.sonatype.org/conte
   -Djavadoc=$ARTIFACT_ID_BASE-$VERSION-javadoc.jar
 popd
 pushd .
-for i in iosarm64 iossimulatorarm64 iosx64 jni-android jni-common jni-jvm-darwin jni-jvm-extract jni-jvm-linux jni-jvm-mingw jni-jvm jvm linuxx64; do
+for i in iosarm64 iosx64 jni-android jni-common jni-jvm-darwin jni-jvm-extract jni-jvm-linux jni-jvm-mingw jni-jvm jvm linux; do
   cd fr/acinq/secp256k1/secp256k1-kmp-$i/$VERSION
-  if [ $i == iosarm64 ] || [ $i == iossimulatorarm64 ] || [ $i == iosx64 ]; then
+  if [ $i == iosarm64 ] || [ $i == iosx64 ]; then
     mvn deploy:deploy-file -DrepositoryId=ossrh -Durl=https://oss.sonatype.org/content/repositories/snapshots/ \
       -DpomFile=$ARTIFACT_ID_BASE-$i-$VERSION.pom \
       -Dfile=$ARTIFACT_ID_BASE-$i-$VERSION.klib \
@@ -32,7 +32,7 @@ for i in iosarm64 iossimulatorarm64 iosx64 jni-android jni-common jni-jvm-darwin
       -Dclassifiers=metadata,,cinterop-libsecp256k1 \
       -Dsources=$ARTIFACT_ID_BASE-$i-$VERSION-sources.jar \
       -Djavadoc=$ARTIFACT_ID_BASE-$i-$VERSION-javadoc.jar
-  elif [ $i == linuxx64 ]; then
+  elif [ $i == linux ]; then
     mvn deploy:deploy-file -DrepositoryId=ossrh -Durl=https://oss.sonatype.org/content/repositories/snapshots/ \
       -DpomFile=$ARTIFACT_ID_BASE-$i-$VERSION.pom \
       -Dfile=$ARTIFACT_ID_BASE-$i-$VERSION.klib \

src/commonMain/kotlin/fr/acinq/secp256k1/Secp256k1.kt

@@ -153,25 +153,6 @@ public interface Secp256k1 {
         }
     }
 
-    public fun musigNonceGen(session_id32: ByteArray, seckey: ByteArray?, pubkey: ByteArray, msg32: ByteArray?, keyagg_cache: ByteArray?, extra_input32: ByteArray?): ByteArray
-
-    public fun musigNonceAgg(pubnonces: Array<ByteArray>): ByteArray
-
-    public fun musigPubkeyAdd(pubkeys: Array<ByteArray>, keyagg_cache: ByteArray?): ByteArray
-
-    public fun musigPubkeyTweakAdd(keyagg_cache: ByteArray, tweak32: ByteArray): ByteArray
-
-    public fun musigPubkeyXonlyTweakAdd(keyagg_cache: ByteArray, tweak32: ByteArray): ByteArray
-
-    public fun musigNonceProcess(aggnonce: ByteArray, msg32: ByteArray, keyagg_cache: ByteArray, adaptor: ByteArray?): ByteArray
-
-    public fun musigPartialSign(secnonce: ByteArray, privkey: ByteArray, keyagg_cache: ByteArray, session: ByteArray): ByteArray
-
-    public fun musigPartialSigVerify(psig: ByteArray, pubnonce: ByteArray, pubkey: ByteArray, keyagg_cache: ByteArray, session: ByteArray): Int
-
-    public fun musigPartialSigAgg(session: ByteArray, psigs: Array<ByteArray>): ByteArray
-
-
     /**
      * Delete the secp256k1 context from dynamic memory.
      */
@@ -180,19 +161,22 @@ public interface Secp256k1 {
     public companion object : Secp256k1 by getSecpk256k1() {
         @JvmStatic
         public fun get(): Secp256k1 = this
-
-        // @formatter:off
-        public const val MUSIG2_SECRET_NONCE_SIZE: Int = 132
-        public const val MUSIG2_PUBLIC_NONCE_SIZE: Int = 66
-        public const val MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE: Int = 197
-        public const val MUSIG2_PUBLIC_SESSION_SIZE: Int = 133
-        // @formatter:on
     }
 }
 
 internal expect fun getSecpk256k1(): Secp256k1
 
-public class Secp256k1Exception : RuntimeException {
+public open class Secp256k1Exception : RuntimeException {
+    public constructor() : super()
+    public constructor(message: String?) : super(message)
+}
+
+public class Secp256k1ErrorCallbackException : Secp256k1Exception {
+    public constructor() : super()
+    public constructor(message: String?) : super(message)
+}
+
+public class Secp256k1IllegalCallbackException : Secp256k1Exception {
     public constructor() : super()
     public constructor(message: String?) : super(message)
 }

src/nativeInterop/cinterop/libsecp256k1.def

@@ -1,14 +1,10 @@
 package = secp256k1
 
-headers = secp256k1.h secp256k1_ecdh.h secp256k1_recovery.h secp256k1_extrakeys.h secp256k1_schnorrsig.h secp256k1_musig.h
-headerFilter = secp256k1/** secp256k1_ecdh.h secp256k1_recovery.h secp256k1_extrakeys.h secp256k1_schnorrsig.h secp256k1_musig.h secp256k1.h
+headers = secp256k1.h secp256k1_ecdh.h secp256k1_recovery.h secp256k1_extrakeys.h secp256k1_schnorrsig.h
+headerFilter = secp256k1/** secp256k1_ecdh.h secp256k1_recovery.h secp256k1_extrakeys.h secp256k1_schnorrsig.h secp256k1.h
 
-staticLibraries.linux = libsecp256k1.a
-libraryPaths.linux = c/secp256k1/build/linux/ native/build/linux/ native/build/darwin/
+libraryPaths.linux = c/secp256k1/build/linux/
 linkerOpts.linux = -L/usr/lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/local/lib
 
-staticLibraries.ios = libsecp256k1.a
-libraryPaths.ios_x64 = c/secp256k1/build/ios/ /usr/local/lib native/build/ios/
-libraryPaths.ios_arm64 = c/secp256k1/build/ios/ /usr/local/lib native/build/ios/
-libraryPaths.ios_simulator_arm64 = c/secp256k1/build/ios/ /usr/local/lib native/build/iosSimulatorArm64/
+libraryPaths.ios = c/secp256k1/build/ios/ /usr/local/lib
 linkerOpts.ios = -framework Security -framework Foundation

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

@@ -1,19 +1,70 @@
 package fr.acinq.secp256k1
 
 import kotlinx.cinterop.*
-import platform.posix.memcpy
 import platform.posix.size_tVar
 import secp256k1.*
 
-@OptIn(ExperimentalUnsignedTypes::class, ExperimentalForeignApi::class)
+private typealias Secp256k1CallbackHandler = (String) -> Unit
+
+@OptIn(ExperimentalStdlibApi::class)
+private class CallbackHandler(ctx: CPointer<secp256k1_context>) : AutoCloseable {
+    var illegalCallBackMessage: String? = null
+    val illegalHandler: Secp256k1CallbackHandler = { x: String -> illegalCallBackMessage = x }
+    val illegalCallbackRef = StableRef.create(illegalHandler)
+    var errorCallBackMessage: String? = null
+    val errorHandler: Secp256k1CallbackHandler = { x: String -> errorCallBackMessage = x }
+    val errorCallbackRef = StableRef.create(errorHandler)
+
+    init {
+        secp256k1_context_set_error_callback(
+            ctx, staticCFunction { buffer: CPointer<ByteVar>?, data: COpaquePointer? ->
+                if (data != null) {
+                    val callback = data.asStableRef<Secp256k1CallbackHandler>().get()
+                    callback(buffer?.toKString() ?: "error callback triggered")
+                }
+            },
+            errorCallbackRef.asCPointer()
+        )
+        secp256k1_context_set_illegal_callback(
+            ctx, staticCFunction { buffer: CPointer<ByteVar>?, data: COpaquePointer? ->
+                if (data != null) {
+                    val callback = data.asStableRef<Secp256k1CallbackHandler>().get()
+                    callback(buffer?.toKString() ?: "illegal callback triggered")
+                }
+            },
+            illegalCallbackRef.asCPointer()
+        )
+    }
+
+    fun checkForErrors() {
+        errorCallBackMessage?.let { throw Secp256k1ErrorCallbackException(it) }
+        illegalCallBackMessage?.let { throw Secp256k1IllegalCallbackException(it) }
+    }
+
+    override fun close() {
+        // StableRef instances have to be disposed of manually
+        illegalCallbackRef.dispose()
+        errorCallbackRef.dispose()
+    }
+}
+
+@OptIn(ExperimentalUnsignedTypes::class, ExperimentalStdlibApi::class)
 public object Secp256k1Native : Secp256k1 {
 
     private val ctx: CPointer<secp256k1_context> by lazy {
+
         secp256k1_context_create((SECP256K1_FLAGS_TYPE_CONTEXT or SECP256K1_FLAGS_BIT_CONTEXT_SIGN or SECP256K1_FLAGS_BIT_CONTEXT_VERIFY).toUInt())
             ?: error("Could not create secp256k1 context")
     }
 
-    private fun Int.requireSuccess(message: String): Int = if (this != 1) throw Secp256k1Exception(message) else this
+    private fun Int.requireSuccess(message: String): Int {
+        return if (this != 1) throw Secp256k1Exception(message) else this
+    }
+
+    private fun Int.requireSuccess(callbackHandler: CallbackHandler, message: String): Int {
+        callbackHandler.checkForErrors()
+        return if (this != 1) throw Secp256k1Exception(message) else this
+    }
 
     private fun MemScope.allocSignature(input: ByteArray): secp256k1_ecdsa_signature {
         val sig = alloc<secp256k1_ecdsa_signature>()
@@ -41,20 +92,6 @@ public object Secp256k1Native : Secp256k1 {
         return pub
     }
 
-    private fun MemScope.allocPublicNonce(pubnonce: ByteArray): secp256k1_musig_pubnonce {
-        val nat = toNat(pubnonce)
-        val nPubnonce = alloc<secp256k1_musig_pubnonce>()
-        secp256k1_musig_pubnonce_parse(ctx, nPubnonce.ptr, nat).requireSuccess("secp256k1_musig_pubnonce_parse() failed")
-        return nPubnonce
-    }
-
-    private fun MemScope.allocPartialSig(psig: ByteArray): secp256k1_musig_partial_sig {
-        val nat = toNat(psig)
-        val nPsig = alloc<secp256k1_musig_partial_sig>()
-        secp256k1_musig_partial_sig_parse(ctx, nPsig.ptr, nat).requireSuccess("secp256k1_musig_partial_sig_parse() failed")
-        return nPsig
-    }
-
     private fun MemScope.serializePubkey(pubkey: secp256k1_pubkey): ByteArray {
         val serialized = allocArray<UByteVar>(65)
         val outputLen = alloc<size_tVar>()
@@ -63,24 +100,6 @@ public object Secp256k1Native : Secp256k1 {
         return serialized.readBytes(outputLen.value.convert())
     }
 
-    private fun MemScope.serializeXonlyPubkey(pubkey: secp256k1_xonly_pubkey): ByteArray {
-        val serialized = allocArray<UByteVar>(32)
-        secp256k1_xonly_pubkey_serialize(ctx, serialized, pubkey.ptr).requireSuccess("secp256k1_xonly_pubkey_serialize() failed")
-        return serialized.readBytes(32)
-    }
-
-    private fun MemScope.serializePubnonce(pubnonce: secp256k1_musig_pubnonce): ByteArray {
-        val serialized = allocArray<UByteVar>(Secp256k1.MUSIG2_PUBLIC_NONCE_SIZE)
-        secp256k1_musig_pubnonce_serialize(ctx, serialized, pubnonce.ptr).requireSuccess("secp256k1_musig_pubnonce_serialize() failed")
-        return serialized.readBytes(Secp256k1.MUSIG2_PUBLIC_NONCE_SIZE)
-    }
-
-    private fun MemScope.serializeAggnonce(aggnonce: secp256k1_musig_aggnonce): ByteArray {
-        val serialized = allocArray<UByteVar>(Secp256k1.MUSIG2_PUBLIC_NONCE_SIZE)
-        secp256k1_musig_aggnonce_serialize(ctx, serialized, aggnonce.ptr).requireSuccess("secp256k1_musig_aggnonce_serialize() failed")
-        return serialized.readBytes(Secp256k1.MUSIG2_PUBLIC_NONCE_SIZE)
-    }
-
     private fun DeferScope.toNat(bytes: ByteArray): CPointer<UByteVar>  {
         val ubytes = bytes.asUByteArray()
         val pinned = ubytes.pin()
@@ -91,173 +110,209 @@ public object Secp256k1Native : Secp256k1 {
     public override fun verify(signature: ByteArray, message: ByteArray, pubkey: ByteArray): Boolean {
         require(message.size == 32)
         require(pubkey.size == 33 || pubkey.size == 65)
-        memScoped {
-            val nPubkey = allocPublicKey(pubkey)
-            val nMessage = toNat(message)
-            val nSig = allocSignature(signature)
-            return secp256k1_ecdsa_verify(ctx, nSig.ptr, nMessage, nPubkey.ptr) == 1
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPubkey = allocPublicKey(pubkey)
+                val nMessage = toNat(message)
+                val nSig = allocSignature(signature)
+                val verify = secp256k1_ecdsa_verify(ctx, nSig.ptr, nMessage, nPubkey.ptr)
+                callbackHandler.checkForErrors()
+                return verify == 1
+            }
         }
     }
 
     public override fun sign(message: ByteArray, privkey: ByteArray): ByteArray {
         require(privkey.size == 32)
         require(message.size == 32)
-        memScoped {
-            val nPrivkey = toNat(privkey)
-            val nMessage = toNat(message)
-            val nSig = alloc<secp256k1_ecdsa_signature>()
-            secp256k1_ecdsa_sign(ctx, nSig.ptr, nMessage, nPrivkey, null, null).requireSuccess("secp256k1_ecdsa_sign() failed")
-            return serializeSignature(nSig)
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPrivkey = toNat(privkey)
+                val nMessage = toNat(message)
+                val nSig = alloc<secp256k1_ecdsa_signature>()
+                secp256k1_ecdsa_sign(ctx, nSig.ptr, nMessage, nPrivkey, null, null).requireSuccess(callbackHandler, "secp256k1_ecdsa_sign() failed")
+                return serializeSignature(nSig)
+            }
         }
     }
 
     public override fun signatureNormalize(sig: ByteArray): Pair<ByteArray, Boolean> {
-        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)
-            return Pair(serializeSignature(nSig), isHighS == 1)
+        require(sig.size >= 64) { "invalid signature ${Hex.encode(sig)}" }
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nSig = allocSignature(sig)
+                val isHighS = secp256k1_ecdsa_signature_normalize(ctx, nSig.ptr, nSig.ptr)
+                callbackHandler.checkForErrors()
+                return Pair(serializeSignature(nSig), isHighS == 1)
+            }
         }
     }
 
     public override fun secKeyVerify(privkey: ByteArray): Boolean {
         if (privkey.size != 32) return false
-        memScoped {
-            val nPrivkey = toNat(privkey)
-            return secp256k1_ec_seckey_verify(ctx, nPrivkey) == 1
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPrivkey = toNat(privkey)
+                val result = secp256k1_ec_seckey_verify(ctx, nPrivkey) == 1
+                callbackHandler.checkForErrors()
+                return result
+            }
         }
     }
 
     public override fun pubkeyCreate(privkey: ByteArray): ByteArray {
         require(privkey.size == 32)
-        memScoped {
-            val nPrivkey = toNat(privkey)
-            val nPubkey = alloc<secp256k1_pubkey>()
-            secp256k1_ec_pubkey_create(ctx, nPubkey.ptr, nPrivkey).requireSuccess("secp256k1_ec_pubkey_create() failed")
-            return serializePubkey(nPubkey)
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPrivkey = toNat(privkey)
+                val nPubkey = alloc<secp256k1_pubkey>()
+                secp256k1_ec_pubkey_create(ctx, nPubkey.ptr, nPrivkey).requireSuccess(callbackHandler, "secp256k1_ec_pubkey_create() failed")
+                return serializePubkey(nPubkey)
+            }
         }
     }
 
     public override fun pubkeyParse(pubkey: ByteArray): ByteArray {
         require(pubkey.size == 33 || pubkey.size == 65)
-        memScoped {
-            val nPubkey = allocPublicKey(pubkey)
-            return serializePubkey(nPubkey)
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPubkey = allocPublicKey(pubkey)
+                val result = serializePubkey(nPubkey)
+                callbackHandler.checkForErrors()
+                return result
+            }
         }
     }
 
     public override fun privKeyNegate(privkey: ByteArray): ByteArray {
         require(privkey.size == 32)
-        memScoped {
-            val negated = privkey.copyOf()
-            val negPriv = toNat(negated)
-            secp256k1_ec_seckey_negate(ctx, negPriv).requireSuccess("secp256k1_ec_seckey_negate() failed")
-            return negated
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val negated = privkey.copyOf()
+                val negPriv = toNat(negated)
+                secp256k1_ec_seckey_negate(ctx, negPriv).requireSuccess(callbackHandler, "secp256k1_ec_seckey_negate() failed")
+                return negated
+            }
         }
     }
 
     public override fun privKeyTweakAdd(privkey: ByteArray, tweak: ByteArray): ByteArray {
         require(privkey.size == 32)
-        require(tweak.size == 32)
-        memScoped {
-            val added = privkey.copyOf()
-            val natAdd = toNat(added)
-            val natTweak = toNat(tweak)
-            secp256k1_ec_seckey_tweak_add(ctx, natAdd, natTweak).requireSuccess("secp256k1_ec_seckey_tweak_add() failed")
-            return added
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val added = privkey.copyOf()
+                val natAdd = toNat(added)
+                val natTweak = toNat(tweak)
+                secp256k1_ec_seckey_tweak_add(ctx, natAdd, natTweak).requireSuccess(callbackHandler, "secp256k1_ec_seckey_tweak_add() failed")
+                return added
+            }
         }
     }
 
     public override fun privKeyTweakMul(privkey: ByteArray, tweak: ByteArray): ByteArray {
         require(privkey.size == 32)
-        require(tweak.size == 32)
-        memScoped {
-            val multiplied = privkey.copyOf()
-            val natMul = toNat(multiplied)
-            val natTweak = toNat(tweak)
-            secp256k1_ec_privkey_tweak_mul(ctx, natMul, natTweak).requireSuccess("secp256k1_ec_privkey_tweak_mul() failed")
-            return multiplied
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val multiplied = privkey.copyOf()
+                val natMul = toNat(multiplied)
+                val natTweak = toNat(tweak)
+                secp256k1_ec_privkey_tweak_mul(ctx, natMul, natTweak).requireSuccess(callbackHandler, "secp256k1_ec_privkey_tweak_mul() failed")
+                return multiplied
+            }
         }
     }
 
     public override fun pubKeyNegate(pubkey: ByteArray): ByteArray {
         require(pubkey.size == 33 || pubkey.size == 65)
-        memScoped {
-            val nPubkey = allocPublicKey(pubkey)
-            secp256k1_ec_pubkey_negate(ctx, nPubkey.ptr).requireSuccess("secp256k1_ec_pubkey_negate() failed")
-            return serializePubkey(nPubkey)
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPubkey = allocPublicKey(pubkey)
+                secp256k1_ec_pubkey_negate(ctx, nPubkey.ptr).requireSuccess(callbackHandler, "secp256k1_ec_pubkey_negate() failed")
+                return serializePubkey(nPubkey)
+            }
         }
     }
 
     public override fun pubKeyTweakAdd(pubkey: ByteArray, tweak: ByteArray): ByteArray {
         require(pubkey.size == 33 || pubkey.size == 65)
-        require(tweak.size == 32)
-        memScoped {
-            val nPubkey = allocPublicKey(pubkey)
-            val nTweak = toNat(tweak)
-            secp256k1_ec_pubkey_tweak_add(ctx, nPubkey.ptr, nTweak).requireSuccess("secp256k1_ec_pubkey_tweak_add() failed")
-            return serializePubkey(nPubkey)
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPubkey = allocPublicKey(pubkey)
+                val nTweak = toNat(tweak)
+                secp256k1_ec_pubkey_tweak_add(ctx, nPubkey.ptr, nTweak).requireSuccess(callbackHandler, "secp256k1_ec_pubkey_tweak_add() failed")
+                return serializePubkey(nPubkey)
+            }
         }
     }
 
     public override fun pubKeyTweakMul(pubkey: ByteArray, tweak: ByteArray): ByteArray {
         require(pubkey.size == 33 || pubkey.size == 65)
-        require(tweak.size == 32)
-        memScoped {
-            val nPubkey = allocPublicKey(pubkey)
-            val nTweak = toNat(tweak)
-            secp256k1_ec_pubkey_tweak_mul(ctx, nPubkey.ptr, nTweak).requireSuccess("secp256k1_ec_pubkey_tweak_mul() failed")
-            return serializePubkey(nPubkey)
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPubkey = allocPublicKey(pubkey)
+                val nTweak = toNat(tweak)
+                secp256k1_ec_pubkey_tweak_mul(ctx, nPubkey.ptr, nTweak).requireSuccess(callbackHandler, "secp256k1_ec_pubkey_tweak_mul() failed")
+                return serializePubkey(nPubkey)
+            }
         }
     }
 
     public override fun pubKeyCombine(pubkeys: Array<ByteArray>): ByteArray {
-        require(pubkeys.isNotEmpty())
         pubkeys.forEach { require(it.size == 33 || it.size == 65) }
-        memScoped {
-            val nPubkeys = pubkeys.map { allocPublicKey(it).ptr }
-            val combined = alloc<secp256k1_pubkey>()
-            secp256k1_ec_pubkey_combine(ctx, combined.ptr, nPubkeys.toCValues(), pubkeys.size.convert()).requireSuccess("secp256k1_ec_pubkey_combine() failed")
-            return serializePubkey(combined)
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPubkeys = pubkeys.map { allocPublicKey(it).ptr }
+                val combined = alloc<secp256k1_pubkey>()
+                secp256k1_ec_pubkey_combine(ctx, combined.ptr, nPubkeys.toCValues(), pubkeys.size.convert()).requireSuccess(callbackHandler, "secp256k1_ec_pubkey_combine() failed")
+                return serializePubkey(combined)
+            }
         }
     }
 
     public override fun ecdh(privkey: ByteArray, pubkey: ByteArray): ByteArray {
         require(privkey.size == 32)
         require(pubkey.size == 33 || pubkey.size == 65)
-        memScoped {
-            val nPubkey = allocPublicKey(pubkey)
-            val nPrivkey = toNat(privkey)
-            val output = allocArray<UByteVar>(32)
-            secp256k1_ecdh(ctx, output, nPubkey.ptr, nPrivkey, null, null).requireSuccess("secp256k1_ecdh() failed")
-            return output.readBytes(32)
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPubkey = allocPublicKey(pubkey)
+                val nPrivkey = toNat(privkey)
+                val output = allocArray<UByteVar>(32)
+                secp256k1_ecdh(ctx, output, nPubkey.ptr, nPrivkey, null, null).requireSuccess(callbackHandler, "secp256k1_ecdh() failed")
+                return output.readBytes(32)
+            }
         }
     }
 
     public override fun ecdsaRecover(sig: ByteArray, message: ByteArray, recid: Int): ByteArray {
         require(sig.size == 64)
         require(message.size == 32)
-        require(recid in 0..3)
-        memScoped {
-            val nSig = toNat(sig)
-            val rSig = alloc<secp256k1_ecdsa_recoverable_signature>()
-            secp256k1_ecdsa_recoverable_signature_parse_compact(ctx, rSig.ptr, nSig, recid).requireSuccess("secp256k1_ecdsa_recoverable_signature_parse_compact() failed")
-            val nMessage = toNat(message)
-            val pubkey = alloc<secp256k1_pubkey>()
-            secp256k1_ecdsa_recover(ctx, pubkey.ptr, rSig.ptr, nMessage).requireSuccess("secp256k1_ecdsa_recover() failed")
-            return serializePubkey(pubkey)
+        // we do not check that recid is valid, which should trigger our illegal callback handler to throw a Secp256k1IllegalCallbackException
+        // require(recid in 0..3)
+
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nSig = toNat(sig)
+                val rSig = alloc<secp256k1_ecdsa_recoverable_signature>()
+                secp256k1_ecdsa_recoverable_signature_parse_compact(ctx, rSig.ptr, nSig, recid).requireSuccess(callbackHandler, "secp256k1_ecdsa_recoverable_signature_parse_compact() failed")
+                val nMessage = toNat(message)
+                val pubkey = alloc<secp256k1_pubkey>()
+                secp256k1_ecdsa_recover(ctx, pubkey.ptr, rSig.ptr, nMessage).requireSuccess(callbackHandler, "secp256k1_ecdsa_recover() failed")
+                return serializePubkey(pubkey)
+            }
         }
     }
 
     public override fun compact2der(sig: ByteArray): ByteArray {
         require(sig.size == 64)
-        memScoped {
-            val nSig = allocSignature(sig)
-            val natOutput = allocArray<UByteVar>(73)
-            val len = alloc<size_tVar>()
-            len.value = 73.convert()
-            secp256k1_ecdsa_signature_serialize_der(ctx, natOutput, len.ptr, nSig.ptr).requireSuccess("secp256k1_ecdsa_signature_serialize_der() failed")
-            return natOutput.readBytes(len.value.toInt())
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nSig = allocSignature(sig)
+                val natOutput = allocArray<UByteVar>(73)
+                val len = alloc<size_tVar>()
+                len.value = 73.convert()
+                secp256k1_ecdsa_signature_serialize_der(ctx, natOutput, len.ptr, nSig.ptr).requireSuccess(callbackHandler, "secp256k1_ecdsa_signature_serialize_der() failed")
+                return natOutput.readBytes(len.value.toInt())
+            }
         }
     }
 
@@ -265,13 +320,15 @@ public object Secp256k1Native : Secp256k1 {
         require(signature.size == 64)
         require(data.size == 32)
         require(pub.size == 32)
-        memScoped {
-            val nPub = toNat(pub)
-            val pubkey = alloc<secp256k1_xonly_pubkey>()
-            secp256k1_xonly_pubkey_parse(ctx, pubkey.ptr, nPub).requireSuccess("secp256k1_xonly_pubkey_parse() failed")
-            val nData = toNat(data)
-            val nSig = toNat(signature)
-            return secp256k1_schnorrsig_verify(ctx, nSig, nData, 32u, pubkey.ptr) == 1
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nPub = toNat(pub)
+                val pubkey = alloc<secp256k1_xonly_pubkey>()
+                secp256k1_xonly_pubkey_parse(ctx, pubkey.ptr, nPub).requireSuccess(callbackHandler, "secp256k1_xonly_pubkey_parse() failed")
+                val nData = toNat(data)
+                val nSig = toNat(signature)
+                return secp256k1_schnorrsig_verify(ctx, nSig, nData, 32u, pubkey.ptr) == 1
+            }
         }
     }
 
@@ -279,174 +336,25 @@ public object Secp256k1Native : Secp256k1 {
         require(sec.size == 32)
         require(data.size == 32)
         auxrand32?.let { require(it.size == 32) }
-        memScoped {
-            val nSec = toNat(sec)
-            val nData = toNat(data)
-            val nAuxrand32 = auxrand32?.let { toNat(it) }
-            val nSig = allocArray<UByteVar>(64)
-            val keypair = alloc<secp256k1_keypair>()
-            secp256k1_keypair_create(ctx, keypair.ptr, nSec).requireSuccess("secp256k1_keypair_create() failed")
-            secp256k1_schnorrsig_sign32(ctx, nSig, nData, keypair.ptr, nAuxrand32).requireSuccess("secp256k1_ecdsa_sign() failed")
-            return nSig.readBytes(64)
-        }
-    }
-
-    override fun musigNonceGen(session_id32: ByteArray, seckey: ByteArray?, pubkey: ByteArray, msg32: ByteArray?, keyagg_cache: ByteArray?, extra_input32: ByteArray?): ByteArray {
-        require(session_id32.size == 32)
-        seckey?.let { require(it.size == 32) }
-        msg32?.let { require(it.size == 32) }
-        keyagg_cache?.let { require(it.size == Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE) }
-        extra_input32?.let { require(it.size == 32) }
-
-        val nonce = memScoped {
-            val secret_nonce = alloc<secp256k1_musig_secnonce>()
-            val public_nonce = alloc<secp256k1_musig_pubnonce>()
-            val nPubkey = allocPublicKey(pubkey)
-            val nKeyAggCache = keyagg_cache?.let {
-                val n = alloc<secp256k1_musig_keyagg_cache>()
-                memcpy(n.ptr, toNat(it), Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong())
-                n
+        CallbackHandler(ctx).use { callbackHandler ->
+            memScoped {
+                val nSec = toNat(sec)
+                val nData = toNat(data)
+                val nAuxrand32 = auxrand32?.let { toNat(it) }
+                val nSig = allocArray<UByteVar>(64)
+                val keypair = alloc<secp256k1_keypair>()
+                secp256k1_keypair_create(ctx, keypair.ptr, nSec).requireSuccess(callbackHandler, "secp256k1_keypair_create() failed")
+                secp256k1_schnorrsig_sign32(ctx, nSig, nData, keypair.ptr, nAuxrand32).requireSuccess(callbackHandler, "secp256k1_ecdsa_sign() failed")
+                return nSig.readBytes(64)
             }
-            secp256k1_musig_nonce_gen(ctx, secret_nonce.ptr, public_nonce.ptr, toNat(session_id32), seckey?.let { toNat(it) }, nPubkey.ptr, msg32?.let { toNat(it) },nKeyAggCache?.ptr, extra_input32?.let { toNat(it) }).requireSuccess("secp256k1_musig_nonce_gen() failed")
-            val nPubnonce = allocArray<UByteVar>(Secp256k1.MUSIG2_PUBLIC_NONCE_SIZE)
-            secp256k1_musig_pubnonce_serialize(ctx, nPubnonce, public_nonce.ptr).requireSuccess("secp256k1_musig_pubnonce_serialize failed")
-            secret_nonce.ptr.readBytes(Secp256k1.MUSIG2_SECRET_NONCE_SIZE) + nPubnonce.readBytes(Secp256k1.MUSIG2_PUBLIC_NONCE_SIZE)
-        }
-        return nonce
-    }
-
-    override fun musigNonceAgg(pubnonces: Array<ByteArray>): ByteArray {
-        require(pubnonces.isNotEmpty())
-        pubnonces.forEach { require(it.size == Secp256k1.MUSIG2_PUBLIC_NONCE_SIZE) }
-        memScoped {
-            val nPubnonces = pubnonces.map { allocPublicNonce(it).ptr }
-            val combined = alloc<secp256k1_musig_aggnonce>()
-            secp256k1_musig_nonce_agg(ctx, combined.ptr, nPubnonces.toCValues(), pubnonces.size.convert()).requireSuccess("secp256k1_musig_nonce_agg() failed")
-            return serializeAggnonce(combined)
         }
     }
-
-    override fun musigPubkeyAdd(pubkeys: Array<ByteArray>, keyagg_cache: ByteArray?): ByteArray {
-        require(pubkeys.isNotEmpty())
-        pubkeys.forEach { require(it.size == 33 || it.size == 65) }
-        keyagg_cache?.let { require(it.size == Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE) }
-        memScoped {
-            val nPubkeys = pubkeys.map { allocPublicKey(it).ptr }
-            val combined = alloc<secp256k1_xonly_pubkey>()
-            val nKeyAggCache = keyagg_cache?.let {
-                val n = alloc<secp256k1_musig_keyagg_cache>()
-                memcpy(n.ptr, toNat(it), Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong())
-                n
-            }
-            secp256k1_musig_pubkey_agg(ctx, combined.ptr, nKeyAggCache?.ptr, nPubkeys.toCValues(), pubkeys.size.convert()).requireSuccess("secp256k1_musig_nonce_agg() failed")
-            val agg =  serializeXonlyPubkey(combined)
-            keyagg_cache?.let { blob -> nKeyAggCache?.let { memcpy(toNat(blob), it.ptr, Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong()) } }
-            return agg
-        }
-    }
-
-    override fun musigPubkeyTweakAdd(keyagg_cache: ByteArray, tweak32: ByteArray): ByteArray {
-        require(keyagg_cache.size == Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE)
-        require(tweak32.size == 32)
-        memScoped {
-            val nKeyAggCache = alloc<secp256k1_musig_keyagg_cache>()
-            memcpy(nKeyAggCache.ptr, toNat(keyagg_cache), Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong())
-            val nPubkey = alloc<secp256k1_pubkey>()
-            secp256k1_musig_pubkey_ec_tweak_add(ctx, nPubkey.ptr, nKeyAggCache.ptr, toNat(tweak32)).requireSuccess("secp256k1_musig_pubkey_ec_tweak_add() failed")
-            memcpy(toNat(keyagg_cache), nKeyAggCache.ptr, Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong())
-            return serializePubkey(nPubkey)
-        }
-    }
-
-    override fun musigPubkeyXonlyTweakAdd(keyagg_cache: ByteArray, tweak32: ByteArray): ByteArray {
-        require(keyagg_cache.size == Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE)
-        require(tweak32.size == 32)
-        memScoped {
-            val nKeyAggCache = alloc<secp256k1_musig_keyagg_cache>()
-            memcpy(nKeyAggCache.ptr, toNat(keyagg_cache), Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong())
-            val nPubkey = alloc<secp256k1_pubkey>()
-            secp256k1_musig_pubkey_xonly_tweak_add(ctx, nPubkey.ptr, nKeyAggCache.ptr, toNat(tweak32)).requireSuccess("secp256k1_musig_pubkey_xonly_tweak_add() failed")
-            memcpy(toNat(keyagg_cache), nKeyAggCache.ptr, Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong())
-            return serializePubkey(nPubkey)
-        }
-    }
-
-    override fun musigNonceProcess(aggnonce: ByteArray, msg32: ByteArray, keyagg_cache: ByteArray, adaptor: ByteArray?): ByteArray {
-        require(aggnonce.size == Secp256k1.MUSIG2_PUBLIC_NONCE_SIZE)
-        require(keyagg_cache.size == Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE)
-        require(msg32.size == 32)
-        memScoped {
-            val nKeyAggCache = alloc<secp256k1_musig_keyagg_cache>()
-            memcpy(nKeyAggCache.ptr, toNat(keyagg_cache), Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong())
-            val nSession = alloc<secp256k1_musig_session>()
-            val nAggnonce = alloc<secp256k1_musig_aggnonce>()
-            secp256k1_musig_aggnonce_parse(ctx, nAggnonce.ptr, toNat(aggnonce)).requireSuccess("secp256k1_musig_aggnonce_parse() failed")
-            secp256k1_musig_nonce_process(ctx, nSession.ptr, nAggnonce.ptr, toNat(msg32), nKeyAggCache.ptr).requireSuccess("secp256k1_musig_nonce_process() failed")
-            val session = ByteArray(Secp256k1.MUSIG2_PUBLIC_SESSION_SIZE)
-            memcpy(toNat(session), nSession.ptr, Secp256k1.MUSIG2_PUBLIC_SESSION_SIZE.toULong())
-            return session
-        }
-     }
-
-    override fun musigPartialSign(secnonce: ByteArray, privkey: ByteArray, keyagg_cache: ByteArray, session: ByteArray): ByteArray {
-        require(secnonce.size == Secp256k1.MUSIG2_SECRET_NONCE_SIZE)
-        require(privkey.size == 32)
-        require(keyagg_cache.size == Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE)
-        require(session.size == Secp256k1.MUSIG2_PUBLIC_SESSION_SIZE)
-
-        memScoped {
-            val nSecnonce = alloc<secp256k1_musig_secnonce>()
-            memcpy(nSecnonce.ptr, toNat(secnonce), Secp256k1.MUSIG2_SECRET_NONCE_SIZE.toULong())
-            val nKeypair = alloc<secp256k1_keypair>()
-            secp256k1_keypair_create(ctx, nKeypair.ptr, toNat(privkey))
-            val nPsig = alloc<secp256k1_musig_partial_sig>()
-            val nKeyAggCache = alloc<secp256k1_musig_keyagg_cache>()
-            memcpy(nKeyAggCache.ptr, toNat(keyagg_cache), Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong())
-            val nSession = alloc<secp256k1_musig_session>()
-            memcpy(nSession.ptr, toNat(session), Secp256k1.MUSIG2_PUBLIC_SESSION_SIZE.toULong())
-            secp256k1_musig_partial_sign(ctx, nPsig.ptr, nSecnonce.ptr, nKeypair.ptr, nKeyAggCache.ptr, nSession.ptr).requireSuccess("secp256k1_musig_partial_sign failed")
-            val psig = ByteArray(32)
-            secp256k1_musig_partial_sig_serialize(ctx, toNat(psig), nPsig.ptr).requireSuccess("secp256k1_musig_partial_sig_serialize() failed")
-            return psig
-        }
-    }
-
-    override fun musigPartialSigVerify(psig: ByteArray, pubnonce: ByteArray, pubkey: ByteArray, keyagg_cache: ByteArray, session: ByteArray): Int {
-        require(psig.size == 32)
-        require(pubnonce.size == Secp256k1.MUSIG2_PUBLIC_NONCE_SIZE)
-        require(pubkey.size == 33 || pubkey.size == 65)
-        require(keyagg_cache.size == Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE)
-        require(session.size == Secp256k1.MUSIG2_PUBLIC_SESSION_SIZE)
-
-        memScoped {
-            val nPSig = allocPartialSig(psig)
-            val nPubnonce = allocPublicNonce(pubnonce)
-            val nPubkey = allocPublicKey(pubkey)
-            val nKeyAggCache = alloc<secp256k1_musig_keyagg_cache>()
-            memcpy(nKeyAggCache.ptr, toNat(keyagg_cache), Secp256k1.MUSIG2_PUBLIC_KEYAGG_CACHE_SIZE.toULong())
-            val nSession = alloc<secp256k1_musig_session>()
-            memcpy(nSession.ptr, toNat(session), Secp256k1.MUSIG2_PUBLIC_SESSION_SIZE.toULong())
-            return secp256k1_musig_partial_sig_verify(ctx, nPSig.ptr, nPubnonce.ptr, nPubkey.ptr, nKeyAggCache.ptr, nSession.ptr)
-        }
-    }
-
-    override fun musigPartialSigAgg(session: ByteArray, psigs: Array<ByteArray>): ByteArray {
-        require(session.size == Secp256k1.MUSIG2_PUBLIC_SESSION_SIZE)
-        require(psigs.isNotEmpty())
-        psigs.forEach { require(it.size == 32) }
-        memScoped {
-            val nSession = alloc<secp256k1_musig_session>()
-            memcpy(nSession.ptr, toNat(session), Secp256k1.MUSIG2_PUBLIC_SESSION_SIZE.toULong())
-            val nPsigs = psigs.map { allocPartialSig(it).ptr }
-            val sig64 = ByteArray(64)
-            secp256k1_musig_partial_sig_agg(ctx, toNat(sig64), nSession.ptr, nPsigs.toCValues(), psigs.size.convert()).requireSuccess("secp256k1_musig_partial_sig_agg() failed")
-            return sig64
-        }
-    }
-
+    
     public override fun cleanup() {
         secp256k1_context_destroy(ctx)
     }
+
+
 }
 
 internal actual fun getSecpk256k1(): Secp256k1 = Secp256k1Native

tests/build.gradle.kts

@@ -36,14 +36,14 @@ kotlin {
     }
 
     if (includeAndroid) {
-        androidTarget {
+        android {
             compilations.all {
                 kotlinOptions.jvmTarget = "1.8"
             }
             sourceSets["androidMain"].dependencies {
                 implementation(project(":jni:android"))
             }
-            sourceSets["androidUnitTest"].dependencies {
+            sourceSets["androidTest"].dependencies {
                 implementation(kotlin("test-junit"))
                 implementation("androidx.test.ext:junit:1.1.2")
                 implementation("androidx.test.espresso:espresso-core:3.3.0")
@@ -51,18 +51,17 @@ kotlin {
         }
     }
 
-    linuxX64()
-    iosX64()
-    iosArm64()
-    iosSimulatorArm64()
+    linuxX64("linux")
+
+    ios()
 }
 
 val includeAndroid = System.getProperty("includeAndroid")?.toBoolean() ?: true
 if (includeAndroid) {
     extensions.configure<com.android.build.gradle.LibraryExtension>("android") {
         defaultConfig {
-            compileSdk =30
-            minSdk = 21
+            compileSdkVersion(30)
+            minSdkVersion(21)
             testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         }
 

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

@@ -275,6 +275,11 @@ class Secp256k1Test {
         val pub0 = Secp256k1.ecdsaRecover(sig, message, 0)
         val pub1 = Secp256k1.ecdsaRecover(sig, message, 1)
         assertTrue(pub.contentEquals(pub0) || pub.contentEquals(pub1))
+
+        // this is a special case, ecdsaRecover explicitly does not check that recid is valid, which triggers our illegal callback handler
+        assertFailsWith(Secp256k1IllegalCallbackException::class) {
+            Secp256k1.ecdsaRecover(sig, message, 4)
+        }
     }
 
     @Test
@@ -352,151 +357,6 @@ class Secp256k1Test {
         }
     }
 
-    @Test
-    fun testMusig2GenerateNonce() {
-        val pubkey = Hex.decode("02F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9")
-        val sessionId = Hex.decode("0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F")
-        val nonce = Secp256k1.musigNonceGen(sessionId, null, pubkey, null, null, null)
-        val pubnonce = Hex.encode(nonce.copyOfRange(132, 132 + 66)).uppercase()
-        assertEquals("02C96E7CB1E8AA5DAC64D872947914198F607D90ECDE5200DE52978AD5DED63C000299EC5117C2D29EDEE8A2092587C3909BE694D5CFF0667D6C02EA4059F7CD9786", pubnonce)
-    }
-
-    @Test
-    fun testMusig2AggregateNonce() {
-        val nonces = listOf(
-            "020151C80F435648DF67A22B749CD798CE54E0321D034B92B709B567D60A42E66603BA47FBC1834437B3212E89A84D8425E7BF12E0245D98262268EBDCB385D50641",
-            "03FF406FFD8ADB9CD29877E4985014F66A59F6CD01C0E88CAA8E5F3166B1F676A60248C264CDD57D3C24D79990B0F865674EB62A0F9018277A95011B41BFC193B833",
-            "020151C80F435648DF67A22B749CD798CE54E0321D034B92B709B567D60A42E6660279BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798",
-            "03FF406FFD8ADB9CD29877E4985014F66A59F6CD01C0E88CAA8E5F3166B1F676A60379BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798",
-            "04FF406FFD8ADB9CD29877E4985014F66A59F6CD01C0E88CAA8E5F3166B1F676A60248C264CDD57D3C24D79990B0F865674EB62A0F9018277A95011B41BFC193B833",
-            "03FF406FFD8ADB9CD29877E4985014F66A59F6CD01C0E88CAA8E5F3166B1F676A60248C264CDD57D3C24D79990B0F865674EB62A0F9018277A95011B41BFC193B831",
-            "03FF406FFD8ADB9CD29877E4985014F66A59F6CD01C0E88CAA8E5F3166B1F676A602FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC30"
-        ).map { Hex.decode(it) }
-        val agg1 = Secp256k1.musigNonceAgg(arrayOf(nonces[0], nonces[1]))
-        assertEquals("035FE1873B4F2967F52FEA4A06AD5A8ECCBE9D0FD73068012C894E2E87CCB5804B024725377345BDE0E9C33AF3C43C0A29A9249F2F2956FA8CFEB55C8573D0262DC8", Hex.encode(agg1).uppercase())
-
-        val agg2 = Secp256k1.musigNonceAgg(arrayOf(nonces[2], nonces[3]))
-        assertEquals("035FE1873B4F2967F52FEA4A06AD5A8ECCBE9D0FD73068012C894E2E87CCB5804B000000000000000000000000000000000000000000000000000000000000000000", Hex.encode(agg2).uppercase())
-
-        assertFails {
-            Secp256k1.musigNonceAgg(arrayOf(nonces[0], nonces[4]))
-        }
-        assertFails {
-            Secp256k1.musigNonceAgg(arrayOf(nonces[5], nonces[1]))
-        }
-        assertFails {
-            Secp256k1.musigNonceAgg(arrayOf(nonces[6], nonces[1]))
-        }
-    }
-
-    @Test
-    fun testMusig2AggregatePubkey() {
-        val pubkeys = listOf(
-            "02F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9",
-            "03DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659",
-            "023590A94E768F8E1815C2F24B4D80A8E3149316C3518CE7B7AD338368D038CA66",
-            "020000000000000000000000000000000000000000000000000000000000000005",
-            "02FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC30",
-            "04F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9",
-            "03935F972DA013F80AE011890FA89B67A27B7BE6CCB24D3274D18B2D4067F261A9"
-
-        ).map { Hex.decode(it) }
-
-        val agg1 = Secp256k1.musigPubkeyAdd(arrayOf(pubkeys[0], pubkeys[1], pubkeys[2]), null)
-        assertEquals("90539EEDE565F5D054F32CC0C220126889ED1E5D193BAF15AEF344FE59D4610C", Hex.encode(agg1).uppercase())
-        val cache = ByteArray(197)
-        val agg2 = Secp256k1.musigPubkeyAdd(arrayOf(pubkeys[0], pubkeys[1], pubkeys[2]), cache)
-        assertEquals("90539EEDE565F5D054F32CC0C220126889ED1E5D193BAF15AEF344FE59D4610C", Hex.encode(agg2).uppercase())
-
-        val agg3 = Secp256k1.musigPubkeyAdd(arrayOf(pubkeys[2], pubkeys[1], pubkeys[0]), null)
-        assertEquals("6204DE8B083426DC6EAF9502D27024D53FC826BF7D2012148A0575435DF54B2B", Hex.encode(agg3).uppercase())
-
-        val agg4 = Secp256k1.musigPubkeyAdd(arrayOf(pubkeys[0], pubkeys[0], pubkeys[0]), null)
-        assertEquals("B436E3BAD62B8CD409969A224731C193D051162D8C5AE8B109306127DA3AA935", Hex.encode(agg4).uppercase())
-
-        val agg5 = Secp256k1.musigPubkeyAdd(arrayOf(pubkeys[0], pubkeys[0], pubkeys[1], pubkeys[1]), null)
-        assertEquals("69BC22BFA5D106306E48A20679DE1D7389386124D07571D0D872686028C26A3E", Hex.encode(agg5).uppercase())
-    }
-
-    @Test
-    fun testMusig2TweakPubkeys() {
-        val pubkeys = listOf(
-            "031b84c5567b126440995d3ed5aaba0565d71e1834604819ff9c17f5e9d5dd078f",
-            "024d4b6cd1361032ca9bd2aeb9d900aa4d45d9ead80ac9423374c451a7254d0766",
-            "02531fe6068134503d2723133227c867ac8fa6c83c537e9a44c3c5bdbdcb1fe337"
-        ).map { Hex.decode(it) }.toTypedArray()
-        val cache = ByteArray(197)
-        val agg1 = Secp256k1.musigPubkeyAdd(pubkeys, cache)
-        assertEquals("b6d830642403fc82511aca5ff98a5e76fcef0f89bffc1aadbe78ee74cd5a5716", Hex.encode(agg1))
-        val agg2 = Secp256k1.musigPubkeyTweakAdd(cache, Hex.decode("7468697320636f756c64206265206120424950333220747765616b2e2e2e2e00"))
-        assertEquals("04791e4f22a21f19bd9798eceab92ad2ccc18f2d6660e91ae4c0709aaebf1aa9023701f468b0eddf8973495a5327f2169d9c6a50eb6a0f87c0fbee90a4067eb230", Hex.encode(agg2))
-        val agg3 = Secp256k1.musigPubkeyXonlyTweakAdd(cache, Hex.decode("7468697320636f756c64206265206120746170726f6f7420747765616b2e2e00"))
-        assertEquals("04537a081a8d32ff700ca86aaa77a423e9b8d1480938076b645c68ee39d263c93948026928799b2d942cb5851db397015b26b1759de1b9ab2c691ced64a2eef836", Hex.encode(agg3))
-    }
-
-    @Test
-    fun testMusig2SigningSession() {
-        val privkeys = listOf(
-            "0101010101010101010101010101010101010101010101010101010101010101",
-            "0202020202020202020202020202020202020202020202020202020202020202",
-        ).map { Hex.decode(it) }.toTypedArray()
-        val pubkeys = privkeys.map { Secp256k1.pubkeyCreate(it) }
-
-        val sessionId = Hex.decode("0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F")
-        val nonces = pubkeys.map { Secp256k1.musigNonceGen(sessionId, null, it, null, null, null) }
-        val secnonces = nonces.map { it.copyOfRange(0, 132) }
-        val pubnonces = nonces.map { it.copyOfRange(132, 132 + 66) }
-        val aggnonce = Secp256k1.musigNonceAgg(pubnonces.toTypedArray())
-
-        val caches = (0 until 2).map { ByteArray(197) }
-        val aggpubkey = Secp256k1.musigPubkeyAdd(pubkeys.toTypedArray(), caches[0])
-        Secp256k1.musigPubkeyAdd(pubkeys.toTypedArray(), caches[1])
-
-        val msg32 = Hex.decode("0303030303030303030303030303030303030303030303030303030303030303")
-        val sessions = (0 until 2).map {  Secp256k1.musigNonceProcess(aggnonce, msg32, caches[it], null) }
-        val psigs = (0 until 2).map {
-            val psig = Secp256k1.musigPartialSign(secnonces[it], privkeys[it], caches[it], sessions[it])
-            val check = Secp256k1.musigPartialSigVerify(psig, pubnonces[it], pubkeys[it], caches[it], sessions[it])
-            assertEquals(1, check)
-            psig
-        }
-        val sig = Secp256k1.musigPartialSigAgg(sessions[0], psigs.toTypedArray())
-        val check = Secp256k1.verifySchnorr(sig, msg32, aggpubkey)
-        assertTrue(check)
-    }
-
-    @Test
-    fun testInvalidArguments() {
-        assertFails {
-            Secp256k1.pubkeyCreate(ByteArray(32))
-        }
-        assertFails {
-            Secp256k1.pubkeyCreate(Hex.decode("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"))
-        }
-        assertFails {
-            Secp256k1.pubkeyParse(ByteArray(33))
-        }
-        assertFails {
-            Secp256k1.pubkeyParse(Hex.decode("03ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"))
-        }
-        assertFails {
-            Secp256k1.pubKeyCombine(arrayOf())
-        }
-        assertFails {
-            Secp256k1.pubKeyCombine(arrayOf(ByteArray(0)))
-        }
-        assertFails {
-            Secp256k1.signSchnorr(ByteArray(0), Hex.decode("0101010101010101010101010101010101010101010101010101010101010101"), null)
-        }
-        assertFails {
-            Secp256k1.ecdsaRecover(
-                Hex.decode("01010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101"),
-                Hex.decode("0202020202020202020202020202020202020202020202020202020202020202"),
-                -1
-            )
-        }
-    }
-
     @Test
     fun fuzzEcdsaSignVerify() {
         val random = Random.Default