diff --git a/Cargo.lock b/Cargo.lock
index 4c12e4f358..343d08e3cd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -793,9 +793,9 @@ dependencies = [
 
 [[package]]
 name = "chrono"
-version = "0.4.33"
+version = "0.4.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f13690e35a5e4ace198e7beea2895d29f3a9cc55015fcebe6336bd2010af9eb"
+checksum = "5bc015644b92d5890fab7489e49d21f879d5c990186827d42ec511919404f38b"
 dependencies = [
  "android-tzdata",
  "iana-time-zone",
diff --git a/cli/src/commands/explore/pallets/calls.rs b/cli/src/commands/explore/pallets/calls.rs
index f5d9609a2e..13edbd83ec 100644
--- a/cli/src/commands/explore/pallets/calls.rs
+++ b/cli/src/commands/explore/pallets/calls.rs
@@ -154,7 +154,7 @@ fn mocked_offline_client(metadata: Metadata) -> OfflineClient<SubstrateConfig> {
         H256::from_str("91b171bb158e2d3848fa23a9f1c25182fb8e20313b2c1eb49219da7a70ce90c3")
             .expect("Valid hash; qed");
 
-    let runtime_version = subxt::backend::RuntimeVersion {
+    let runtime_version = subxt::RuntimeVersion {
         spec_version: 9370,
         transaction_version: 20,
     };
diff --git a/core/src/lib.rs b/core/src/lib.rs
index 455d0b8b07..ed04b54775 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -15,7 +15,7 @@ pub mod config;
 pub mod constants;
 pub mod custom_values;
 pub mod dynamic;
-mod error;
+pub mod error;
 pub mod metadata;
 pub mod runtime_api;
 pub mod signer;
@@ -23,17 +23,21 @@ pub mod storage;
 pub mod tx;
 pub mod utils;
 
-pub use error::{Error, ExtrinsicParamsError, MetadataError, StorageAddressError};
-
 pub use client::{ClientBase, RuntimeVersion};
 pub use config::{
-    BlockHash, Config, ExtrinsicParams, ExtrinsicParamsEncoder, PolkadotConfig,
-    PolkadotExtrinsicParams, SubstrateConfig, SubstrateExtrinsicParams,
+    signed_extensions, BlockHash, Config, ExtrinsicParams, ExtrinsicParamsEncoder, Hasher, Header,
+    PolkadotConfig, PolkadotExtrinsicParams, SignedExtension, SubstrateConfig,
+    SubstrateExtrinsicParams,
 };
+pub use dynamic::{DecodedValue, DecodedValueThunk};
+pub use error::{Error, ExtrinsicParamsError, MetadataError, StorageAddressError};
 pub use metadata::Metadata;
 pub use signer::Signer;
 pub use storage::StorageAddress;
-pub use utils::{to_hex, AccountId32, MultiAddress, MultiSignature, Yes, H160, H256, H512};
+pub use utils::{
+    strip_compact_prefix, to_hex, AccountId32, KeyedVec, MultiAddress, MultiSignature, Yes, H160,
+    H256, H512,
+};
 
 #[macro_use]
 mod macros;
diff --git a/core/src/tx/mod.rs b/core/src/tx/mod.rs
index de2f45b64a..ebf5ca73f1 100644
--- a/core/src/tx/mod.rs
+++ b/core/src/tx/mod.rs
@@ -38,6 +38,20 @@ pub trait TxPayload {
     fn validation_details(&self) -> Option<ValidationDetails<'_>> {
         None
     }
+
+    fn validate(&self, metadata: &Metadata) -> Result<(), Error> {
+        if let Some(details) = self.validation_details() {
+            let expected_hash = metadata
+                .pallet_by_name_err(details.pallet_name)?
+                .call_hash(details.call_name)
+                .ok_or_else(|| MetadataError::CallNameNotFound(details.call_name.to_owned()))?;
+
+            if details.hash != expected_hash {
+                return Err(MetadataError::IncompatibleCodegen.into());
+            }
+        }
+        Ok(())
+    }
 }
 
 pub struct ValidationDetails<'a> {
diff --git a/subxt/Cargo.toml b/subxt/Cargo.toml
index cb3fc3363f..80786edc7a 100644
--- a/subxt/Cargo.toml
+++ b/subxt/Cargo.toml
@@ -24,23 +24,11 @@ default = ["jsonrpsee", "native"]
 
 # Enable this for native (ie non web/wasm builds).
 # Exactly 1 of "web" and "native" is expected.
-native = [
-    "jsonrpsee?/async-client", 
-    "jsonrpsee?/client-ws-transport-native-tls", 
-    "subxt-lightclient?/native", 
-    "tokio-util"
-]
+native = ["jsonrpsee?/async-client", "jsonrpsee?/client-ws-transport-native-tls", "subxt-lightclient?/native", "tokio-util"]
 
 # Enable this for web/wasm builds.
 # Exactly 1 of "web" and "native" is expected.
-web = [
-    "jsonrpsee?/async-wasm-client", 
-    "jsonrpsee?/client-web-transport", 
-    "getrandom/js", 
-    "subxt-lightclient?/web", 
-    "subxt-macro/web", 
-    "instant/wasm-bindgen"
-]
+web = ["jsonrpsee?/async-wasm-client", "jsonrpsee?/client-web-transport", "getrandom/js", "subxt-lightclient?/web", "subxt-macro/web", "instant/wasm-bindgen"]
 
 # Enable this to use the reconnecting rpc client
 unstable-reconnecting-rpc-client = ["dep:reconnecting-jsonrpsee-ws-client"]
@@ -51,7 +39,7 @@ jsonrpsee = ["dep:jsonrpsee"]
 # Enable this to pull in extra Substrate dependencies which make it possible to
 # use the `sp_core::crypto::Pair` Signer implementation, as well as adding some
 # `From` impls for types like `AccountId32`. Cannot be used with "web".
-substrate-compat = ["sp-core", "sp-runtime"]
+substrate-compat = ["sp-core", "sp-runtime", "subxt-core/substrate-compat"]
 
 # Enable this to fetch and utilize the latest unstable metadata from a node.
 # The unstable metadata is subject to breaking changes and the subxt might
diff --git a/subxt/examples/setup_config_custom.rs b/subxt/examples/setup_config_custom.rs
index 0f2ad2e27b..886999df7a 100644
--- a/subxt/examples/setup_config_custom.rs
+++ b/subxt/examples/setup_config_custom.rs
@@ -1,6 +1,6 @@
 #![allow(missing_docs)]
 use codec::Encode;
-use subxt::client::OfflineClientT;
+use subxt::client::{ClientBase};
 use subxt::config::{Config, ExtrinsicParams, ExtrinsicParamsEncoder};
 use subxt_core::ExtrinsicParamsError;
 use subxt_signer::sr25519::dev;
@@ -57,9 +57,9 @@ impl<T: Config> ExtrinsicParams<T> for CustomExtrinsicParams<T> {
     type OtherParams = CustomExtrinsicParamsBuilder;
 
     // Gather together all of the params we will need to encode:
-    fn new<Client: OfflineClientT<T>>(
+    fn new(
         _nonce: u64,
-        client: Client,
+        client: ClientBase<T>,
         other_params: Self::OtherParams,
     ) -> Result<Self, ExtrinsicParamsError> {
         Ok(Self {
diff --git a/subxt/examples/setup_config_signed_extension.rs b/subxt/examples/setup_config_signed_extension.rs
index a48e17570f..01593f7fed 100644
--- a/subxt/examples/setup_config_signed_extension.rs
+++ b/subxt/examples/setup_config_signed_extension.rs
@@ -2,7 +2,6 @@
 use codec::Encode;
 use scale_encode::EncodeAsType;
 use scale_info::PortableRegistry;
-use subxt::client::OfflineClientT;
 use subxt::config::{
     Config, DefaultExtrinsicParamsBuilder, ExtrinsicParams, ExtrinsicParamsEncoder,
 };
@@ -62,7 +61,7 @@ impl<T: Config> ExtrinsicParams<T> for CustomSignedExtension {
 
     fn new(
         _nonce: u64,
-        _client: subxt_core::ClientBase,
+        _client: subxt_core::ClientBase<T>,
         _other_params: Self::OtherParams,
     ) -> Result<Self, ExtrinsicParamsError> {
         Ok(CustomSignedExtension)
diff --git a/subxt/src/backend/legacy/mod.rs b/subxt/src/backend/legacy/mod.rs
index cffb3f4475..507d6d9ce5 100644
--- a/subxt/src/backend/legacy/mod.rs
+++ b/subxt/src/backend/legacy/mod.rs
@@ -12,12 +12,13 @@ use crate::backend::{
     rpc::RpcClient, Backend, BlockRef, RuntimeVersion, StorageResponse, StreamOf, StreamOfResults,
     TransactionStatus,
 };
-use crate::{config::Header, Config, Error};
+use crate::Error;
 use async_trait::async_trait;
 use futures::{future, future::Either, stream, Future, FutureExt, Stream, StreamExt};
 use std::collections::VecDeque;
 use std::pin::Pin;
 use std::task::{Context, Poll};
+use subxt_core::{config::Header, Config};
 
 // Expose the RPC methods.
 pub use rpc_methods::LegacyRpcMethods;
diff --git a/subxt/src/backend/unstable/follow_stream.rs b/subxt/src/backend/unstable/follow_stream.rs
index 9474f7a302..6a55def6c0 100644
--- a/subxt/src/backend/unstable/follow_stream.rs
+++ b/subxt/src/backend/unstable/follow_stream.rs
@@ -3,12 +3,12 @@
 // see LICENSE for license details.
 
 use super::rpc_methods::{FollowEvent, UnstableRpcMethods};
-use crate::config::Config;
 use crate::error::Error;
 use futures::{FutureExt, Stream, StreamExt};
 use std::future::Future;
 use std::pin::Pin;
 use std::task::{Context, Poll};
+use subxt_core::config::Config;
 
 /// A `Stream` whose goal is to remain subscribed to `chainHead_follow`. It will re-subscribe if the subscription
 /// is ended for any reason, and it will return the current `subscription_id` as an event, along with the other
@@ -206,9 +206,9 @@ pub(super) mod test_utils {
     use crate::backend::unstable::rpc_methods::{
         BestBlockChanged, Finalized, Initialized, NewBlock,
     };
-    use crate::config::substrate::H256;
     use std::sync::atomic::{AtomicUsize, Ordering};
     use std::sync::Arc;
+    use subxt_core::config::substrate::H256;
 
     /// Given some events, returns a follow stream getter that we can use in
     /// place of the usual RPC method.
diff --git a/subxt/src/backend/unstable/follow_stream_driver.rs b/subxt/src/backend/unstable/follow_stream_driver.rs
index d32c98a104..295bca5ab8 100644
--- a/subxt/src/backend/unstable/follow_stream_driver.rs
+++ b/subxt/src/backend/unstable/follow_stream_driver.rs
@@ -4,7 +4,6 @@
 
 use super::follow_stream_unpin::{BlockRef, FollowStreamMsg, FollowStreamUnpin};
 use crate::backend::unstable::rpc_methods::{FollowEvent, Initialized, RuntimeEvent};
-use crate::config::BlockHash;
 use crate::error::Error;
 use futures::stream::{Stream, StreamExt};
 use std::collections::{HashMap, HashSet, VecDeque};
@@ -12,6 +11,7 @@ use std::ops::DerefMut;
 use std::pin::Pin;
 use std::sync::{Arc, Mutex};
 use std::task::{Context, Poll, Waker};
+use subxt_core::config::BlockHash;
 
 /// A `Stream` which builds on `FollowStreamDriver`, and allows multiple subscribers to obtain events
 /// from the single underlying subscription (each being provided an `Initialized` message and all new
diff --git a/subxt/src/backend/unstable/follow_stream_unpin.rs b/subxt/src/backend/unstable/follow_stream_unpin.rs
index ca00e37690..7b97ae33de 100644
--- a/subxt/src/backend/unstable/follow_stream_unpin.rs
+++ b/subxt/src/backend/unstable/follow_stream_unpin.rs
@@ -7,7 +7,6 @@ use super::UnstableRpcMethods;
 use crate::backend::unstable::rpc_methods::{
     BestBlockChanged, Finalized, FollowEvent, Initialized, NewBlock,
 };
-use crate::config::{BlockHash, Config};
 use crate::error::Error;
 use futures::stream::{FuturesUnordered, Stream, StreamExt};
 use std::collections::{HashMap, HashSet};
@@ -15,6 +14,7 @@ use std::future::Future;
 use std::pin::Pin;
 use std::sync::{Arc, Mutex};
 use std::task::{Context, Poll, Waker};
+use subxt_core::config::{BlockHash, Config};
 
 /// The type of stream item.
 pub use super::follow_stream::FollowStreamMsg;
@@ -455,7 +455,7 @@ impl<Hash: BlockHash> Drop for BlockRef<Hash> {
 pub(super) mod test_utils {
     use super::super::follow_stream::{test_utils::test_stream_getter, FollowStream};
     use super::*;
-    use crate::config::substrate::H256;
+    use subxt_core::config::substrate::H256;
 
     pub type UnpinRx<Hash> = std::sync::mpsc::Receiver<(Hash, Arc<str>)>;
 
@@ -542,7 +542,7 @@ mod test {
     };
     use super::test_utils::{assert_from_unpin_rx, ev_new_block_ref, test_unpin_stream_getter};
     use super::*;
-    use crate::config::substrate::H256;
+    use subxt_core::config::substrate::H256;
 
     #[tokio::test]
     async fn hands_back_blocks() {
diff --git a/subxt/src/backend/unstable/mod.rs b/subxt/src/backend/unstable/mod.rs
index 82a2d50d48..8d6af54cd9 100644
--- a/subxt/src/backend/unstable/mod.rs
+++ b/subxt/src/backend/unstable/mod.rs
@@ -25,7 +25,6 @@ use crate::backend::{
     rpc::RpcClient, Backend, BlockRef, BlockRefT, RuntimeVersion, StorageResponse, StreamOf,
     StreamOfResults, TransactionStatus,
 };
-use crate::config::BlockHash;
 use crate::error::{Error, RpcError};
 use crate::Config;
 use async_trait::async_trait;
@@ -35,6 +34,7 @@ use std::collections::HashMap;
 use std::sync::Arc;
 use std::task::Poll;
 use storage_items::StorageItems;
+use subxt_core::config::BlockHash;
 
 // Expose the RPC methods.
 pub use rpc_methods::UnstableRpcMethods;
diff --git a/subxt/src/backend/unstable/rpc_methods.rs b/subxt/src/backend/unstable/rpc_methods.rs
index a397d2fbdb..107f615187 100644
--- a/subxt/src/backend/unstable/rpc_methods.rs
+++ b/subxt/src/backend/unstable/rpc_methods.rs
@@ -7,13 +7,13 @@
 //! methods exposed here.
 
 use crate::backend::rpc::{rpc_params, RpcClient, RpcSubscription};
-use crate::config::BlockHash;
 use crate::{Config, Error};
 use derivative::Derivative;
 use futures::{Stream, StreamExt};
 use serde::{Deserialize, Serialize};
 use std::collections::{HashMap, VecDeque};
 use std::task::Poll;
+use subxt_core::config::BlockHash;
 use subxt_core::to_hex;
 
 /// An interface to call the unstable RPC methods. This interface is instantiated with
diff --git a/subxt/src/backend/unstable/storage_items.rs b/subxt/src/backend/unstable/storage_items.rs
index 73790765ea..148eac15f2 100644
--- a/subxt/src/backend/unstable/storage_items.rs
+++ b/subxt/src/backend/unstable/storage_items.rs
@@ -7,7 +7,6 @@ use super::follow_stream_unpin::BlockRef;
 use super::rpc_methods::{
     FollowEvent, MethodResponse, StorageQuery, StorageResult, UnstableRpcMethods,
 };
-use crate::config::Config;
 use crate::error::{Error, RpcError};
 use futures::{FutureExt, Stream, StreamExt};
 use std::collections::VecDeque;
@@ -15,6 +14,7 @@ use std::future::Future;
 use std::pin::Pin;
 use std::sync::Arc;
 use std::task::{Context, Poll};
+use subxt_core::config::Config;
 
 /// Obtain a stream of storage items given some query. this handles continuing
 /// and stopping under the hood, and returns a stream of `StorageResult`s.
diff --git a/subxt/src/blocks/block_types.rs b/subxt/src/blocks/block_types.rs
index a1cb01ec25..f6c27fe2d8 100644
--- a/subxt/src/blocks/block_types.rs
+++ b/subxt/src/blocks/block_types.rs
@@ -6,16 +6,15 @@ use crate::{
     backend::BlockRef,
     blocks::{extrinsic_types::ExtrinsicPartTypeIds, Extrinsics},
     client::{OfflineClientT, OnlineClientT},
-    config::{Config, Header},
     error::{BlockError, DecodeError, Error},
     events,
     runtime_api::RuntimeApi,
     storage::Storage,
 };
-
 use codec::{Decode, Encode};
 use futures::lock::Mutex as AsyncMutex;
 use std::sync::Arc;
+use subxt_core::{Config, Header};
 
 /// A representation of a block.
 pub struct Block<T: Config, C> {
@@ -57,7 +56,7 @@ where
     }
 
     /// Return the block number.
-    pub fn number(&self) -> <T::Header as crate::config::Header>::Number {
+    pub fn number(&self) -> <T::Header as subxt_core::Header>::Number {
         self.header().number()
     }
 
diff --git a/subxt/src/blocks/blocks_client.rs b/subxt/src/blocks/blocks_client.rs
index 9ec031a35a..7d86de3d01 100644
--- a/subxt/src/blocks/blocks_client.rs
+++ b/subxt/src/blocks/blocks_client.rs
@@ -6,13 +6,13 @@ use super::Block;
 use crate::{
     backend::{BlockRef, StreamOfResults},
     client::OnlineClientT,
-    config::Config,
     error::{BlockError, Error},
-    utils::PhantomDataSendSync,
 };
 use derivative::Derivative;
 use futures::StreamExt;
 use std::future::Future;
+use subxt_core::utils::PhantomDataSendSync;
+use subxt_core::Config;
 
 type BlockStream<T> = StreamOfResults<T>;
 type BlockStreamRes<T> = Result<BlockStream<T>, Error>;
diff --git a/subxt/src/blocks/extrinsic_types.rs b/subxt/src/blocks/extrinsic_types.rs
index e90e3c3bdc..734862d1ff 100644
--- a/subxt/src/blocks/extrinsic_types.rs
+++ b/subxt/src/blocks/extrinsic_types.rs
@@ -5,22 +5,20 @@
 use crate::{
     blocks::block_types::{get_events, CachedEvents},
     client::{OfflineClientT, OnlineClientT},
-    config::{Config, Hasher},
     error::{BlockError, Error, MetadataError},
-    events, Metadata,
+    events,
+};
+use subxt_core::{
+    metadata::MetadatExt,
+    signed_extensions::{ChargeAssetTxPayment, ChargeTransactionPayment, CheckNonce},
+    strip_compact_prefix, Config, Hasher, Metadata,
 };
 
-use subxt_core::metadata::{types::PalletMetadata, MetadatExt};
-
-use crate::config::signed_extensions::{
-    ChargeAssetTxPayment, ChargeTransactionPayment, CheckNonce,
-};
-use crate::config::SignedExtension;
-use crate::dynamic::DecodedValue;
-use crate::utils::strip_compact_prefix;
 use codec::Decode;
 use derivative::Derivative;
 use scale_decode::{DecodeAsFields, DecodeAsType};
+use subxt_core::{DecodedValue, SignedExtension};
+use subxt_metadata::PalletMetadata;
 
 use std::sync::Arc;
 
diff --git a/subxt/src/client/mod.rs b/subxt/src/client/mod.rs
index c764af4b59..1eabeeed52 100644
--- a/subxt/src/client/mod.rs
+++ b/subxt/src/client/mod.rs
@@ -23,3 +23,4 @@ pub use offline_client::{OfflineClient, OfflineClientT};
 pub use online_client::{
     ClientRuntimeUpdater, OnlineClient, OnlineClientT, RuntimeUpdaterStream, Update, UpgradeError,
 };
+pub use subxt_core::ClientBase;
\ No newline at end of file
diff --git a/subxt/src/lib.rs b/subxt/src/lib.rs
index 5842f513e9..6774f2eecb 100644
--- a/subxt/src/lib.rs
+++ b/subxt/src/lib.rs
@@ -66,7 +66,15 @@ pub use crate::{
 };
 
 // We replace this by proper exports, once the API of subxt_core is aggreed upon.
-pub use subxt_core::*;
+// pub use subxt_core::*;
+
+pub use subxt_core::{
+    dynamic, signed_extensions, AccountId32, BlockHash, ClientBase, Config, DecodedValue,
+    DecodedValueThunk, ExtrinsicParams, ExtrinsicParamsEncoder, Hasher, Header, Metadata,
+    MultiAddress, PolkadotConfig, PolkadotExtrinsicParams, RuntimeVersion, Signer, StorageAddress,
+    SubstrateConfig, SubstrateExtrinsicParams,
+    config, metadata,
+};
 
 /// Re-export external crates that are made use of in the subxt API.
 pub mod ext {
@@ -77,6 +85,7 @@ pub mod ext {
     pub use scale_decode;
     pub use scale_encode;
     pub use scale_value;
+    pub use subxt_core;
 
     cfg_substrate_compat! {
         pub use sp_runtime;
diff --git a/subxt/src/macros.rs b/subxt/src/macros.rs
index 47362f18ca..3c6d2a8e6c 100644
--- a/subxt/src/macros.rs
+++ b/subxt/src/macros.rs
@@ -64,7 +64,7 @@ macro_rules! cfg_reconnecting_rpc_client {
 }
 
 pub(crate) use {
-    cfg_feature, cfg_jsonrpsee, cfg_reconnecting_rpc_client, cfg_substrate_compat,
+    cfg_feature, cfg_jsonrpsee, cfg_reconnecting_rpc_client,
     cfg_unstable_light_client,
 };
 
diff --git a/subxt/src/runtime_api/runtime_client.rs b/subxt/src/runtime_api/runtime_client.rs
index 5770285b83..708c0fb253 100644
--- a/subxt/src/runtime_api/runtime_client.rs
+++ b/subxt/src/runtime_api/runtime_client.rs
@@ -4,9 +4,10 @@
 
 use super::runtime_types::RuntimeApi;
 
-use crate::{backend::BlockRef, client::OnlineClientT, error::Error, Config};
+use crate::{backend::BlockRef, client::OnlineClientT, error::Error};
 use derivative::Derivative;
 use std::{future::Future, marker::PhantomData};
+use subxt_core::Config;
 
 /// Execute runtime API calls.
 #[derive(Derivative)]
diff --git a/subxt/src/runtime_api/runtime_types.rs b/subxt/src/runtime_api/runtime_types.rs
index 0bc518fe6b..03c8256788 100644
--- a/subxt/src/runtime_api/runtime_types.rs
+++ b/subxt/src/runtime_api/runtime_types.rs
@@ -6,12 +6,12 @@ use crate::{
     backend::{BackendExt, BlockRef},
     client::OnlineClientT,
     error::{Error, MetadataError},
-    Config,
 };
 use codec::Decode;
 use derivative::Derivative;
 use std::{future::Future, marker::PhantomData};
 use subxt_core::metadata::{DecodeWithMetadata, MetadatExt};
+use subxt_core::Config;
 
 use super::RuntimeApiPayload;
 
diff --git a/subxt/src/storage/storage_client.rs b/subxt/src/storage/storage_client.rs
index 7b62ed6b9a..98cca519a8 100644
--- a/subxt/src/storage/storage_client.rs
+++ b/subxt/src/storage/storage_client.rs
@@ -7,10 +7,10 @@ use crate::{
     backend::BlockRef,
     client::{OfflineClientT, OnlineClientT},
     error::Error,
-    Config,
 };
 use derivative::Derivative;
 use std::{future::Future, marker::PhantomData};
+use subxt_core::Config;
 use subxt_core::{
     metadata::MetadatExt,
     storage::utils::{storage_address_bytes, storage_address_root_bytes, validate_storage_address},
diff --git a/subxt/src/storage/storage_type.rs b/subxt/src/storage/storage_type.rs
index 51cc4cac18..8761ed0108 100644
--- a/subxt/src/storage/storage_type.rs
+++ b/subxt/src/storage/storage_type.rs
@@ -14,13 +14,13 @@ use crate::{
     backend::{BackendExt, BlockRef},
     client::OnlineClientT,
     error::{Error, MetadataError},
-    Config,
 };
 use codec::Decode;
 use derivative::Derivative;
 use futures::StreamExt;
 use std::{future::Future, marker::PhantomData};
 use subxt_core::metadata::DecodeWithMetadata;
+use subxt_core::Config;
 
 /// This is returned from a couple of storage functions.
 pub use crate::backend::StreamOfResults;
diff --git a/subxt/src/tx/tx_client.rs b/subxt/src/tx/tx_client.rs
index 8029781f91..0e2eca679f 100644
--- a/subxt/src/tx/tx_client.rs
+++ b/subxt/src/tx/tx_client.rs
@@ -4,19 +4,20 @@
 
 use std::borrow::Cow;
 
+use super::TxProgress;
 use crate::{
     backend::{BackendExt, BlockRef, TransactionStatus},
     client::{OfflineClientT, OnlineClientT},
-    config::{Config, ExtrinsicParams, ExtrinsicParamsEncoder, Hasher},
-    error::{Error, MetadataError},
-    utils::{Encoded, PhantomDataSendSync},
+    error::Error,
 };
 use codec::{Compact, Decode, Encode};
 use derivative::Derivative;
 use sp_core_hashing::blake2_256;
-use subxt_core::{metadata::MetadatExt, tx::TxPayload, Signer as SignerT};
-
-use super::TxProgress;
+use subxt_core::{
+    tx::TxPayload,
+    utils::{Encoded, PhantomDataSendSync},
+    Config, ExtrinsicParams, ExtrinsicParamsEncoder, Hasher, Signer as SignerT,
+};
 
 /// A client for working with transactions.
 #[derive(Derivative)]
@@ -45,18 +46,7 @@ impl<T: Config, C: OfflineClientT<T>> TxClient<T, C> {
     where
         Call: TxPayload,
     {
-        if let Some(details) = call.validation_details() {
-            let expected_hash = self
-                .client
-                .metadata()
-                .pallet_by_name_err(details.pallet_name)?
-                .call_hash(details.call_name)
-                .ok_or_else(|| MetadataError::CallNameNotFound(details.call_name.to_owned()))?;
-
-            if details.hash != expected_hash {
-                return Err(MetadataError::IncompatibleCodegen.into());
-            }
-        }
+        call.validate(&self.client.metadata())?;
         Ok(())
     }
 
diff --git a/subxt/src/tx/tx_progress.rs b/subxt/src/tx/tx_progress.rs
index 166b2cda33..77b3f98cfb 100644
--- a/subxt/src/tx/tx_progress.rs
+++ b/subxt/src/tx/tx_progress.rs
@@ -6,16 +6,16 @@
 
 use std::task::Poll;
 
-use crate::utils::strip_compact_prefix;
 use crate::{
     backend::{BlockRef, StreamOfResults, TransactionStatus as BackendTxStatus},
     client::OnlineClientT,
     error::{DispatchError, Error, RpcError, TransactionError},
     events::EventsClient,
-    Config,
 };
 use derivative::Derivative;
 use futures::{Stream, StreamExt};
+use subxt_core::utils::strip_compact_prefix;
+use subxt_core::Config;
 
 /// This struct represents a subscription to the progress of some transaction.
 pub struct TxProgress<T: Config, C> {
@@ -296,7 +296,7 @@ impl<T: Config, C: OnlineClientT<T>> TxInBlock<T, C> {
         let extrinsic_idx = block_body
             .iter()
             .position(|ext| {
-                use crate::config::Hasher;
+                use subxt_core::Hasher;
                 let Ok((_, stripped)) = strip_compact_prefix(ext) else {
                     return false;
                 };
@@ -325,9 +325,11 @@ mod test {
         backend::{StreamOfResults, TransactionStatus},
         client::{OfflineClientT, OnlineClientT},
         tx::TxProgress,
-        Config, Error, SubstrateConfig,
+        Error,
     };
 
+    use subxt_core::{Config, SubstrateConfig};
+
     type MockTxProgress = TxProgress<SubstrateConfig, MockClient>;
     type MockHash = <SubstrateConfig as Config>::Hash;
     type MockSubstrateTxStatus = TransactionStatus<MockHash>;
diff --git a/subxt/src/utils.rs b/subxt/src/utils.rs
index b02acebba0..d7cedf98da 100644
--- a/subxt/src/utils.rs
+++ b/subxt/src/utils.rs
@@ -4,7 +4,7 @@
 
 //! Utility functions used in subxt. Reexports all elements from [`subxt_core::utils`];
 
-pub use subxt_core::utils::*;
+pub use subxt_core::utils::{strip_compact_prefix, to_hex,UncheckedExtrinsic,  AccountId32, MultiAddress, MultiSignature, KeyedVec, Yes, H160, H256, H512, bits };
 
 use url::Url;