start porting dynamic value stuff

subxt/src/custom_values/custom_value_address.rs

@@ -2,7 +2,7 @@ use derivative::Derivative;
 use std::marker::PhantomData;
 
 use crate::dynamic::DecodedValueThunk;
-use crate::metadata::DecodeWithMetadata;
+use subxt_core::metadata::DecodeWithMetadata;
 
 /// This represents the address of a custom value in in the metadata.
 /// Anything, that implements the [CustomValueAddress] trait can be used, to fetch

subxt/src/custom_values/custom_values_client.rs

@@ -1,9 +1,9 @@
 use crate::client::OfflineClientT;
 use crate::custom_values::custom_value_address::{CustomValueAddress, Yes};
 use crate::error::MetadataError;
-use crate::metadata::DecodeWithMetadata;
 use crate::{Config, Error};
 use derivative::Derivative;
+use subxt_core::metadata::DecodeWithMetadata;
 
 /// A client for accessing custom values stored in the metadata.
 #[derive(Derivative)]