Adding data classes

multiplatform-crypto-libsodium-bindings/src/commonMain/kotlin/debug/test/DebugTest.kt

@@ -9,7 +9,13 @@ expect class Sha512State
 
 expect class GenericHashState
 
+expect class SecretStreamState
+
 expect class Crypto internal constructor() {
+  /**
+   * Initialize the SHA256 hash
+   * returns sha 256 state
+   */
   fun crypto_hash_sha256_init(): Sha256State
 
   fun crypto_hash_sha256_update(state: Sha256State, input: UByteArray)
@@ -23,4 +29,11 @@ expect class Crypto internal constructor() {
   fun crypto_hash_sha512_final(state: Sha512State): UByteArray
 
   fun crypto_generichash_init(key: UByteArray, outlen: Int): GenericHashState
+
+  fun crypto_secretstream_xchacha20poly1305_init_push(key: UByteArray): UByteArray
+
+  data class SecretStreamStateAndHeader(
+    val state: SecretStreamState,
+    val header: UByteArray
+  )
 }