text: #include <stdlib.h>
  #include <stdint.h>
  #include <string.h>
  #include "org_vivuscoin_NativeSecp256k1.h"
  #include "include/secp256k1.h"
  #include "include/secp256k1_ecdh.h"
  #include "include/secp256k1_recovery.h"
  
  
  SECP256K1_API jlong JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1ctx_1clone
    (JNIEnv* env, jclass classObject, jlong ctx_l)
  {
    const secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
  
    jlong ctx_clone_l = (uintptr_t) secp256k1_context_clone(ctx);
  
    (void)classObject;(void)env;
  
    return ctx_clone_l;
  
  }
  
  SECP256K1_API jint JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1context_1randomize
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
  
    const unsigned char* seed = (unsigned char*) (*env)->GetDirectBufferAddress(env, byteBufferObject);
  
    (void)classObject;
  
    return secp256k1_context_randomize(ctx, seed);
  
  }
  
  SECP256K1_API void JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1destroy_1context
    (JNIEnv* env, jclass classObject, jlong ctx_l)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
  
    secp256k1_context_destroy(ctx);
  
    (void)classObject;(void)env;
  }
  
  SECP256K1_API jint JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1ecdsa_1verify
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l, jint siglen, jint publen)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
  
    unsigned char* data = (unsigned char*) (*env)->GetDirectBufferAddress(env, byteBufferObject);
    const unsigned char* sigdata = {  (unsigned char*) (data + 32) };
    const unsigned char* pubdata = { (unsigned char*) (data + siglen + 32) };
  
    secp256k1_ecdsa_signature sig;
    secp256k1_pubkey pubkey;
  
    int ret = secp256k1_ecdsa_signature_parse_der(ctx, &sig, sigdata, siglen);
  
    if( ret ) {
      ret = secp256k1_ec_pubkey_parse(ctx, &pubkey, pubdata, publen);
  
      if( ret ) {
        ret = secp256k1_ecdsa_verify(ctx, &sig, data, &pubkey);
      }
    }
  
    (void)classObject;
  
    return ret;
  }
  
  SECP256K1_API jobjectArray JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1ecdsa_1sign
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
    unsigned char* data = (unsigned char*) (*env)->GetDirectBufferAddress(env, byteBufferObject);
    unsigned char* secKey = (unsigned char*) (data + 32);
  
    jobjectArray retArray;
    jbyteArray sigArray, intsByteArray;
    unsigned char intsarray[2];
  
    secp256k1_ecdsa_signature sig[72];
  
    int ret = secp256k1_ecdsa_sign(ctx, sig, data, secKey, NULL, NULL );
  
    unsigned char outputSer[72];
    size_t outputLen = 72;
  
    if( ret ) {
      int ret2 = secp256k1_ecdsa_signature_serialize_der(ctx,outputSer, &outputLen, sig ); (void)ret2;
    }
  
    intsarray[0] = outputLen;
    intsarray[1] = ret;
  
    retArray = (*env)->NewObjectArray(env, 2,
      (*env)->FindClass(env, "[B"),
      (*env)->NewByteArray(env, 1));
  
    sigArray = (*env)->NewByteArray(env, outputLen);
    (*env)->SetByteArrayRegion(env, sigArray, 0, outputLen, (jbyte*)outputSer);
    (*env)->SetObjectArrayElement(env, retArray, 0, sigArray);
  
    intsByteArray = (*env)->NewByteArray(env, 2);
    (*env)->SetByteArrayRegion(env, intsByteArray, 0, 2, (jbyte*)intsarray);
    (*env)->SetObjectArrayElement(env, retArray, 1, intsByteArray);
  
    (void)classObject;
  
    return retArray;
  }
  
  SECP256K1_API jint JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1ec_1seckey_1verify
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
    unsigned char* secKey = (unsigned char*) (*env)->GetDirectBufferAddress(env, byteBufferObject);
  
    (void)classObject;
  
    return secp256k1_ec_seckey_verify(ctx, secKey);
  }
  
  SECP256K1_API jobjectArray JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1ec_1pubkey_1create
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
    const unsigned char* secKey = (unsigned char*) (*env)->GetDirectBufferAddress(env, byteBufferObject);
  
    secp256k1_pubkey pubkey;
  
    jobjectArray retArray;
    jbyteArray pubkeyArray, intsByteArray;
    unsigned char intsarray[2];
  
    int ret = secp256k1_ec_pubkey_create(ctx, &pubkey, secKey);
  
    unsigned char outputSer[65];
    size_t outputLen = 65;
  
    if( ret ) {
      int ret2 = secp256k1_ec_pubkey_serialize(ctx,outputSer, &outputLen, &pubkey,SECP256K1_EC_UNCOMPRESSED );(void)ret2;
    }
  
    intsarray[0] = outputLen;
    intsarray[1] = ret;
  
    retArray = (*env)->NewObjectArray(env, 2,
      (*env)->FindClass(env, "[B"),
      (*env)->NewByteArray(env, 1));
  
    pubkeyArray = (*env)->NewByteArray(env, outputLen);
    (*env)->SetByteArrayRegion(env, pubkeyArray, 0, outputLen, (jbyte*)outputSer);
    (*env)->SetObjectArrayElement(env, retArray, 0, pubkeyArray);
  
    intsByteArray = (*env)->NewByteArray(env, 2);
    (*env)->SetByteArrayRegion(env, intsByteArray, 0, 2, (jbyte*)intsarray);
    (*env)->SetObjectArrayElement(env, retArray, 1, intsByteArray);
  
    (void)classObject;
  
    return retArray;
  
  }
  
  SECP256K1_API jobjectArray JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1privkey_1tweak_1add
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
    unsigned char* privkey = (unsigned char*) (*env)->GetDirectBufferAddress(env, byteBufferObject);
    const unsigned char* tweak = (unsigned char*) (privkey + 32);
  
    jobjectArray retArray;
    jbyteArray privArray, intsByteArray;
    unsigned char intsarray[2];
  
    int privkeylen = 32;
  
    int ret = secp256k1_ec_privkey_tweak_add(ctx, privkey, tweak);
  
    intsarray[0] = privkeylen;
    intsarray[1] = ret;
  
    retArray = (*env)->NewObjectArray(env, 2,
      (*env)->FindClass(env, "[B"),
      (*env)->NewByteArray(env, 1));
  
    privArray = (*env)->NewByteArray(env, privkeylen);
    (*env)->SetByteArrayRegion(env, privArray, 0, privkeylen, (jbyte*)privkey);
    (*env)->SetObjectArrayElement(env, retArray, 0, privArray);
  
    intsByteArray = (*env)->NewByteArray(env, 2);
    (*env)->SetByteArrayRegion(env, intsByteArray, 0, 2, (jbyte*)intsarray);
    (*env)->SetObjectArrayElement(env, retArray, 1, intsByteArray);
  
    (void)classObject;
  
    return retArray;
  }
  
  SECP256K1_API jobjectArray JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1privkey_1tweak_1mul
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
    unsigned char* privkey = (unsigned char*) (*env)->GetDirectBufferAddress(env, byteBufferObject);
    const unsigned char* tweak = (unsigned char*) (privkey + 32);
  
    jobjectArray retArray;
    jbyteArray privArray, intsByteArray;
    unsigned char intsarray[2];
  
    int privkeylen = 32;
  
    int ret = secp256k1_ec_privkey_tweak_mul(ctx, privkey, tweak);
  
    intsarray[0] = privkeylen;
    intsarray[1] = ret;
  
    retArray = (*env)->NewObjectArray(env, 2,
      (*env)->FindClass(env, "[B"),
      (*env)->NewByteArray(env, 1));
  
    privArray = (*env)->NewByteArray(env, privkeylen);
    (*env)->SetByteArrayRegion(env, privArray, 0, privkeylen, (jbyte*)privkey);
    (*env)->SetObjectArrayElement(env, retArray, 0, privArray);
  
    intsByteArray = (*env)->NewByteArray(env, 2);
    (*env)->SetByteArrayRegion(env, intsByteArray, 0, 2, (jbyte*)intsarray);
    (*env)->SetObjectArrayElement(env, retArray, 1, intsByteArray);
  
    (void)classObject;
  
    return retArray;
  }
  
  SECP256K1_API jobjectArray JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1pubkey_1tweak_1add
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l, jint publen)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
  /*  secp256k1_pubkey* pubkey = (secp256k1_pubkey*) (*env)->GetDirectBufferAddress(env, byteBufferObject);*/
    unsigned char* pkey = (*env)->GetDirectBufferAddress(env, byteBufferObject);
    const unsigned char* tweak = (unsigned char*) (pkey + publen);
  
    jobjectArray retArray;
    jbyteArray pubArray, intsByteArray;
    unsigned char intsarray[2];
    unsigned char outputSer[65];
    size_t outputLen = 65;
  
    secp256k1_pubkey pubkey;
    int ret = secp256k1_ec_pubkey_parse(ctx, &pubkey, pkey, publen);
  
    if( ret ) {
      ret = secp256k1_ec_pubkey_tweak_add(ctx, &pubkey, tweak);
    }
  
    if( ret ) {
      int ret2 = secp256k1_ec_pubkey_serialize(ctx,outputSer, &outputLen, &pubkey,SECP256K1_EC_UNCOMPRESSED );(void)ret2;
    }
  
    intsarray[0] = outputLen;
    intsarray[1] = ret;
  
    retArray = (*env)->NewObjectArray(env, 2,
      (*env)->FindClass(env, "[B"),
      (*env)->NewByteArray(env, 1));
  
    pubArray = (*env)->NewByteArray(env, outputLen);
    (*env)->SetByteArrayRegion(env, pubArray, 0, outputLen, (jbyte*)outputSer);
    (*env)->SetObjectArrayElement(env, retArray, 0, pubArray);
  
    intsByteArray = (*env)->NewByteArray(env, 2);
    (*env)->SetByteArrayRegion(env, intsByteArray, 0, 2, (jbyte*)intsarray);
    (*env)->SetObjectArrayElement(env, retArray, 1, intsByteArray);
  
    (void)classObject;
  
    return retArray;
  }
  
  SECP256K1_API jobjectArray JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1pubkey_1tweak_1mul
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l, jint publen)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
    unsigned char* pkey = (*env)->GetDirectBufferAddress(env, byteBufferObject);
    const unsigned char* tweak = (unsigned char*) (pkey + publen);
  
    jobjectArray retArray;
    jbyteArray pubArray, intsByteArray;
    unsigned char intsarray[2];
    unsigned char outputSer[65];
    size_t outputLen = 65;
  
    secp256k1_pubkey pubkey;
    int ret = secp256k1_ec_pubkey_parse(ctx, &pubkey, pkey, publen);
  
    if ( ret ) {
      ret = secp256k1_ec_pubkey_tweak_mul(ctx, &pubkey, tweak);
    }
  
    if( ret ) {
      int ret2 = secp256k1_ec_pubkey_serialize(ctx,outputSer, &outputLen, &pubkey,SECP256K1_EC_UNCOMPRESSED );(void)ret2;
    }
  
    intsarray[0] = outputLen;
    intsarray[1] = ret;
  
    retArray = (*env)->NewObjectArray(env, 2,
      (*env)->FindClass(env, "[B"),
      (*env)->NewByteArray(env, 1));
  
    pubArray = (*env)->NewByteArray(env, outputLen);
    (*env)->SetByteArrayRegion(env, pubArray, 0, outputLen, (jbyte*)outputSer);
    (*env)->SetObjectArrayElement(env, retArray, 0, pubArray);
  
    intsByteArray = (*env)->NewByteArray(env, 2);
    (*env)->SetByteArrayRegion(env, intsByteArray, 0, 2, (jbyte*)intsarray);
    (*env)->SetObjectArrayElement(env, retArray, 1, intsByteArray);
  
    (void)classObject;
  
    return retArray;
  }
  
  SECP256K1_API jlong JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1ecdsa_1pubkey_1combine
    (JNIEnv * env, jclass classObject, jobject byteBufferObject, jlong ctx_l, jint numkeys)
  {
    (void)classObject;(void)env;(void)byteBufferObject;(void)ctx_l;(void)numkeys;
  
    return 0;
  }
  
  SECP256K1_API jobjectArray JNICALL Java_org_vivuscoin_NativeSecp256k1_secp256k1_1ecdh
    (JNIEnv* env, jclass classObject, jobject byteBufferObject, jlong ctx_l, jint publen)
  {
    secp256k1_context *ctx = (secp256k1_context*)(uintptr_t)ctx_l;
    const unsigned char* secdata = (*env)->GetDirectBufferAddress(env, byteBufferObject);
    const unsigned char* pubdata = (const unsigned char*) (secdata + 32);
  
    jobjectArray retArray;
    jbyteArray outArray, intsByteArray;
    unsigned char intsarray[1];
    secp256k1_pubkey pubkey;
    unsigned char nonce_res[32];
    size_t outputLen = 32;
  
    int ret = secp256k1_ec_pubkey_parse(ctx, &pubkey, pubdata, publen);
  
    if (ret) {
      ret = secp256k1_ecdh(
        ctx,
        nonce_res,
        &pubkey,
        secdata
      );
    }
  
    intsarray[0] = ret;
  
    retArray = (*env)->NewObjectArray(env, 2,
      (*env)->FindClass(env, "[B"),
      (*env)->NewByteArray(env, 1));
  
    outArray = (*env)->NewByteArray(env, outputLen);
    (*env)->SetByteArrayRegion(env, outArray, 0, 32, (jbyte*)nonce_res);
    (*env)->SetObjectArrayElement(env, retArray, 0, outArray);
  
    intsByteArray = (*env)->NewByteArray(env, 1);
    (*env)->SetByteArrayRegion(env, intsByteArray, 0, 1, (jbyte*)intsarray);
    (*env)->SetObjectArrayElement(env, retArray, 1, intsByteArray);
  
    (void)classObject;
  
    return retArray;
  }
  