+static inline LDKStr java_to_owned_str(JNIEnv *env, jstring str) {
+ uint64_t str_len = (*env)->GetStringUTFLength(env, str);
+ char* newchars = MALLOC(str_len + 1, "String chars");
+ const char* jchars = (*env)->GetStringUTFChars(env, str, NULL);
+ memcpy(newchars, jchars, str_len);
+ newchars[str_len] = 0;
+ (*env)->ReleaseStringUTFChars(env, str, jchars);
+ LDKStr res = {
+ .chars = newchars,
+ .len = str_len,
+ .chars_is_owned = true
+ };
+ return res;
+}