diff --git a/core/src/libtx/error.rs b/core/src/libtx/error.rs
index 68810fd15..89a1ecfb5 100644
--- a/core/src/libtx/error.rs
+++ b/core/src/libtx/error.rs
@@ -16,7 +16,7 @@
 use failure::{Backtrace, Context, Fail};
 use std::fmt::{self, Display};
 
-use crate::core::{committed, transaction};
+use crate::core::transaction;
 use crate::keychain;
 use crate::util::secp;
 
@@ -44,12 +44,6 @@ pub enum ErrorKind {
 	/// Rangeproof error
 	#[fail(display = "Rangeproof Error")]
 	RangeProof(String),
-	/// Fee error
-	#[fail(display = "Fee Error")]
-	Fee(String),
-	/// Error from summing commitments via committed trait.
-	#[fail(display = "Committed Error")]
-	Committed(committed::Error),
 }
 
 impl Fail for Error {
@@ -97,14 +91,6 @@ impl From<secp::Error> for Error {
 	}
 }
 
-impl From<committed::Error> for Error {
-	fn from(error: committed::Error) -> Error {
-		Error {
-			inner: Context::new(ErrorKind::Committed(error)),
-		}
-	}
-}
-
 impl From<keychain::Error> for Error {
 	fn from(error: keychain::Error) -> Error {
 		Error {
diff --git a/core/src/libtx/mod.rs b/core/src/libtx/mod.rs
index a9c802b03..e48047e67 100644
--- a/core/src/libtx/mod.rs
+++ b/core/src/libtx/mod.rs
@@ -27,7 +27,6 @@ mod error;
 pub mod proof;
 pub mod reward;
 pub mod secp_ser;
-pub mod slate;
 
 use crate::consensus;
 use crate::core::Transaction;
diff --git a/wallet/src/adapters/file.rs b/wallet/src/adapters/file.rs
index 41c8aaaff..0fd305cce 100644
--- a/wallet/src/adapters/file.rs
+++ b/wallet/src/adapters/file.rs
@@ -16,7 +16,7 @@
 use std::fs::File;
 use std::io::{Read, Write};
 
-use crate::core::libtx::slate::Slate;
+use crate::libwallet::slate::Slate;
 use crate::libwallet::{Error, ErrorKind};
 use crate::{WalletCommAdapter, WalletConfig};
 use serde_json as json;
diff --git a/wallet/src/adapters/http.rs b/wallet/src/adapters/http.rs
index 03e36826a..31ce97f77 100644
--- a/wallet/src/adapters/http.rs
+++ b/wallet/src/adapters/http.rs
@@ -14,7 +14,7 @@
 
 use crate::api;
 use crate::controller;
-use crate::core::libtx::slate::Slate;
+use crate::libwallet::slate::Slate;
 use crate::libwallet::{Error, ErrorKind};
 use crate::{instantiate_wallet, HTTPNodeClient, WalletCommAdapter, WalletConfig};
 /// HTTP Wallet 'plugin' implementation
diff --git a/wallet/src/adapters/keybase.rs b/wallet/src/adapters/keybase.rs
index 2e411919d..2cac127fb 100644
--- a/wallet/src/adapters/keybase.rs
+++ b/wallet/src/adapters/keybase.rs
@@ -15,7 +15,7 @@
 // Keybase Wallet Plugin
 
 use crate::controller;
-use crate::core::libtx::slate::Slate;
+use crate::libwallet::slate::Slate;
 use crate::libwallet::{Error, ErrorKind};
 use crate::{instantiate_wallet, HTTPNodeClient, WalletCommAdapter, WalletConfig};
 use failure::ResultExt;
diff --git a/wallet/src/adapters/mod.rs b/wallet/src/adapters/mod.rs
index 88f028a27..c42b09647 100644
--- a/wallet/src/adapters/mod.rs
+++ b/wallet/src/adapters/mod.rs
@@ -22,7 +22,7 @@ pub use self::http::HTTPWalletCommAdapter;
 pub use self::keybase::KeybaseWalletCommAdapter;
 pub use self::null::NullWalletCommAdapter;
 
-use crate::core::libtx::slate::Slate;
+use crate::libwallet::slate::Slate;
 use crate::libwallet::Error;
 use crate::WalletConfig;
 use std::collections::HashMap;
diff --git a/wallet/src/adapters/null.rs b/wallet/src/adapters/null.rs
index 18ee73bea..9ac7500ee 100644
--- a/wallet/src/adapters/null.rs
+++ b/wallet/src/adapters/null.rs
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 /// Null Output 'plugin' implementation
-use crate::core::libtx::slate::Slate;
+use crate::libwallet::slate::Slate;
 use crate::libwallet::Error;
 use crate::{WalletCommAdapter, WalletConfig};
 
diff --git a/wallet/src/controller.rs b/wallet/src/controller.rs
index cad0a9bdd..9bd584932 100644
--- a/wallet/src/controller.rs
+++ b/wallet/src/controller.rs
@@ -19,9 +19,9 @@ use crate::adapters::{FileWalletCommAdapter, HTTPWalletCommAdapter, KeybaseWalle
 use crate::api::{ApiServer, BasicAuthMiddleware, Handler, ResponseFuture, Router, TLSConfig};
 use crate::core::core;
 use crate::core::core::Transaction;
-use crate::core::libtx::slate::Slate;
 use crate::keychain::Keychain;
 use crate::libwallet::api::{APIForeign, APIOwner};
+use crate::libwallet::slate::Slate;
 use crate::libwallet::types::{
 	CbData, NodeClient, OutputData, SendTXArgs, TxLogEntry, WalletBackend, WalletInfo,
 };
@@ -344,8 +344,7 @@ where
 					match e.kind() {
 						// user errors, don't backtrace
 						ErrorKind::NotEnoughFunds { .. } => {}
-						ErrorKind::FeeDispute { .. } => {}
-						ErrorKind::FeeExceedsAmount { .. } => {}
+						ErrorKind::Fee { .. } => {}
 						_ => {
 							// otherwise give full dump
 							error!("Backtrace: {}", e.backtrace().unwrap());
diff --git a/wallet/src/lib.rs b/wallet/src/lib.rs
index 1e5076846..1569929f2 100644
--- a/wallet/src/lib.rs
+++ b/wallet/src/lib.rs
@@ -46,6 +46,7 @@ pub use crate::adapters::{
 	WalletCommAdapter,
 };
 pub use crate::error::{Error, ErrorKind};
+pub use crate::libwallet::slate::Slate;
 pub use crate::libwallet::types::{
 	BlockFees, CbData, NodeClient, WalletBackend, WalletInfo, WalletInst,
 };
diff --git a/wallet/src/libwallet/api.rs b/wallet/src/libwallet/api.rs
index fbe857bfb..5302e1f19 100644
--- a/wallet/src/libwallet/api.rs
+++ b/wallet/src/libwallet/api.rs
@@ -36,10 +36,10 @@ use uuid::Uuid;
 
 use crate::core::core::hash::Hashed;
 use crate::core::core::Transaction;
-use crate::core::libtx::slate::Slate;
 use crate::core::ser;
 use crate::keychain::{Identifier, Keychain};
 use crate::libwallet::internal::{keys, tx, updater};
+use crate::libwallet::slate::Slate;
 use crate::libwallet::types::{
 	AcctPathMapping, BlockFees, CbData, NodeClient, OutputData, OutputLockFn, TxLogEntry,
 	TxLogEntryType, TxWrapper, WalletBackend, WalletInfo,
diff --git a/wallet/src/libwallet/error.rs b/wallet/src/libwallet/error.rs
index 867e7b63e..491e78e09 100644
--- a/wallet/src/libwallet/error.rs
+++ b/wallet/src/libwallet/error.rs
@@ -14,9 +14,10 @@
 
 //! Error types for libwallet
 
-use crate::core::core::transaction;
+use crate::core::core::{committed, transaction};
 use crate::core::libtx;
 use crate::keychain;
+use crate::util::secp;
 use failure::{Backtrace, Context, Fail};
 use std::env;
 use std::fmt::{self, Display};
@@ -47,37 +48,9 @@ pub enum ErrorKind {
 		needed_disp: String,
 	},
 
-	/// Fee dispute
-	#[fail(
-		display = "Fee dispute: sender fee {}, recipient fee {}",
-		sender_fee_disp, recipient_fee_disp
-	)]
-	FeeDispute {
-		/// sender fee
-		sender_fee: u64,
-		/// display friendly
-		sender_fee_disp: String,
-		/// recipient fee
-		recipient_fee: u64,
-		/// display friendly
-		recipient_fee_disp: String,
-	},
-
-	/// Fee Exceeds amount
-	#[fail(
-		display = "Fee exceeds amount: sender amount {}, recipient fee {}",
-		sender_amount_disp, recipient_fee
-	)]
-	FeeExceedsAmount {
-		/// sender amount
-		sender_amount: u64,
-		/// display friendly
-		sender_amount_disp: String,
-		/// recipient fee
-		recipient_fee: u64,
-		/// display friendly
-		recipient_fee_disp: String,
-	},
+	/// Fee error
+	#[fail(display = "Fee Error: {}", _0)]
+	Fee(String),
 
 	/// LibTX Error
 	#[fail(display = "LibTx Error")]
@@ -97,7 +70,7 @@ pub enum ErrorKind {
 
 	/// Secp Error
 	#[fail(display = "Secp error")]
-	Secp,
+	Secp(secp::Error),
 
 	/// Callback implementation error conversion
 	#[fail(display = "Trait Implementation error")]
@@ -140,8 +113,8 @@ pub enum ErrorKind {
 	Uri,
 
 	/// Signature error
-	#[fail(display = "Signature error")]
-	Signature(&'static str),
+	#[fail(display = "Signature error: {}", _0)]
+	Signature(String),
 
 	/// Attempt to use duplicate transaction id in separate transactions
 	#[fail(display = "Duplicate transaction ID error")]
@@ -199,6 +172,10 @@ pub enum ErrorKind {
 	#[fail(display = "Unknown Account Label '{}'", _0)]
 	UnknownAccountLabel(String),
 
+	/// Error from summing commitments via committed trait.
+	#[fail(display = "Committed Error")]
+	Committed(committed::Error),
+
 	/// Other
 	#[fail(display = "Generic error: {}", _0)]
 	GenericError(String),
@@ -305,3 +282,19 @@ impl From<crate::core::ser::Error> for Error {
 		}
 	}
 }
+
+impl From<secp::Error> for Error {
+	fn from(error: secp::Error) -> Error {
+		Error {
+			inner: Context::new(ErrorKind::Secp(error)),
+		}
+	}
+}
+
+impl From<committed::Error> for Error {
+	fn from(error: committed::Error) -> Error {
+		Error {
+			inner: Context::new(ErrorKind::Committed(error)),
+		}
+	}
+}
diff --git a/wallet/src/libwallet/internal/selection.rs b/wallet/src/libwallet/internal/selection.rs
index 379b133d2..c9e4b3d27 100644
--- a/wallet/src/libwallet/internal/selection.rs
+++ b/wallet/src/libwallet/internal/selection.rs
@@ -15,10 +15,11 @@
 //! Selection of inputs for building transactions
 
 use crate::core::core::{amount_to_hr_string, Transaction};
-use crate::core::libtx::{build, slate::Slate, tx_fee};
+use crate::core::libtx::{build, tx_fee};
 use crate::keychain::{Identifier, Keychain};
 use crate::libwallet::error::{Error, ErrorKind};
 use crate::libwallet::internal::keys;
+use crate::libwallet::slate::Slate;
 use crate::libwallet::types::*;
 use std::collections::HashMap;
 use std::marker::PhantomData;
diff --git a/wallet/src/libwallet/internal/tx.rs b/wallet/src/libwallet/internal/tx.rs
index cbcfb79b9..459885d4c 100644
--- a/wallet/src/libwallet/internal/tx.rs
+++ b/wallet/src/libwallet/internal/tx.rs
@@ -16,9 +16,9 @@
 
 use uuid::Uuid;
 
-use crate::core::libtx::slate::Slate;
 use crate::keychain::{Identifier, Keychain};
 use crate::libwallet::internal::{selection, updater};
+use crate::libwallet::slate::Slate;
 use crate::libwallet::types::{Context, NodeClient, OutputLockFn, TxLogEntryType, WalletBackend};
 use crate::libwallet::{Error, ErrorKind};
 
@@ -149,10 +149,7 @@ where
 		participant_id,
 	)?;
 	// Final transaction can be built by anyone at this stage
-	let res = slate.finalize(wallet.keychain());
-	if let Err(e) = res {
-		Err(ErrorKind::LibTX(e.kind()))?
-	}
+	slate.finalize(wallet.keychain())?;
 	Ok(())
 }
 
diff --git a/wallet/src/libwallet/mod.rs b/wallet/src/libwallet/mod.rs
index 3dcfc49c5..aa69b8845 100644
--- a/wallet/src/libwallet/mod.rs
+++ b/wallet/src/libwallet/mod.rs
@@ -25,6 +25,7 @@
 pub mod api;
 mod error;
 pub mod internal;
+pub mod slate;
 pub mod types;
 
 pub use crate::libwallet::error::{Error, ErrorKind};
diff --git a/core/src/libtx/slate.rs b/wallet/src/libwallet/slate.rs
similarity index 97%
rename from core/src/libtx/slate.rs
rename to wallet/src/libwallet/slate.rs
index 85d91bef5..d06286980 100644
--- a/core/src/libtx/slate.rs
+++ b/wallet/src/libwallet/slate.rs
@@ -16,17 +16,17 @@
 //! around during an interactive wallet exchange
 
 use crate::blake2::blake2b::blake2b;
-use crate::core::amount_to_hr_string;
-use crate::core::committed::Committed;
-use crate::core::transaction::{kernel_features, kernel_sig_msg, Transaction, Weighting};
-use crate::core::verifier_cache::LruVerifierCache;
 use crate::keychain::{BlindSum, BlindingFactor, Keychain};
-use crate::libtx::error::{Error, ErrorKind};
-use crate::libtx::{aggsig, build, secp_ser, tx_fee};
+use crate::libwallet::error::{Error, ErrorKind};
 use crate::util::secp;
 use crate::util::secp::key::{PublicKey, SecretKey};
 use crate::util::secp::Signature;
 use crate::util::RwLock;
+use grin_core::core::amount_to_hr_string;
+use grin_core::core::committed::Committed;
+use grin_core::core::transaction::{kernel_features, kernel_sig_msg, Transaction, Weighting};
+use grin_core::core::verifier_cache::LruVerifierCache;
+use grin_core::libtx::{aggsig, build, secp_ser, tx_fee};
 use rand::thread_rng;
 use std::sync::Arc;
 use uuid::Uuid;
diff --git a/wallet/src/libwallet/types.rs b/wallet/src/libwallet/types.rs
index 15e563126..81ef38f9c 100644
--- a/wallet/src/libwallet/types.rs
+++ b/wallet/src/libwallet/types.rs
@@ -21,11 +21,11 @@ use crate::core::libtx::aggsig;
 use crate::core::ser;
 use crate::keychain::{Identifier, Keychain};
 use crate::libwallet::error::{Error, ErrorKind};
+use crate::libwallet::slate::ParticipantMessages;
 use crate::util::secp::key::{PublicKey, SecretKey};
 use crate::util::secp::{self, pedersen, Secp256k1};
 use chrono::prelude::*;
 use failure::ResultExt;
-use grin_core::libtx::slate::ParticipantMessages;
 use serde;
 use serde_json;
 use std::collections::HashMap;
diff --git a/wallet/src/test_framework/testclient.rs b/wallet/src/test_framework/testclient.rs
index b6bb8fcac..5e34a2d39 100644
--- a/wallet/src/test_framework/testclient.rs
+++ b/wallet/src/test_framework/testclient.rs
@@ -21,12 +21,12 @@ use self::chain::Chain;
 use self::core::core::verifier_cache::LruVerifierCache;
 use self::core::core::Transaction;
 use self::core::global::{set_mining_mode, ChainTypes};
-use self::core::libtx::slate::Slate;
 use self::core::{pow, ser};
 use self::keychain::Keychain;
 use self::util::secp::pedersen;
 use self::util::secp::pedersen::Commitment;
 use self::util::{Mutex, RwLock, StopState};
+use crate::libwallet::slate::Slate;
 use crate::libwallet::types::*;
 use crate::{controller, libwallet, WalletCommAdapter, WalletConfig};
 use failure::ResultExt;
diff --git a/wallet/tests/repost.rs b/wallet/tests/repost.rs
index 1712245de..e24cd6f62 100644
--- a/wallet/tests/repost.rs
+++ b/wallet/tests/repost.rs
@@ -17,8 +17,8 @@ extern crate log;
 
 use self::core::global;
 use self::core::global::ChainTypes;
-use self::core::libtx::slate::Slate;
 use self::keychain::ExtKeychain;
+use self::libwallet::slate::Slate;
 use self::wallet::test_framework::{self, LocalWalletClient, WalletProxy};
 use self::wallet::{libwallet, FileWalletCommAdapter};
 use grin_core as core;
diff --git a/wallet/tests/restore.rs b/wallet/tests/restore.rs
index 1b39b535d..1c1b08373 100644
--- a/wallet/tests/restore.rs
+++ b/wallet/tests/restore.rs
@@ -16,8 +16,8 @@
 extern crate log;
 use self::core::global;
 use self::core::global::ChainTypes;
-use self::core::libtx::slate::Slate;
 use self::keychain::{ExtKeychain, Identifier, Keychain};
+use self::libwallet::slate::Slate;
 use self::wallet::libwallet;
 use self::wallet::libwallet::types::AcctPathMapping;
 use self::wallet::test_framework::{self, LocalWalletClient, WalletProxy};
diff --git a/wallet/tests/transaction.rs b/wallet/tests/transaction.rs
index c9840f616..e4b8b1358 100644
--- a/wallet/tests/transaction.rs
+++ b/wallet/tests/transaction.rs
@@ -16,8 +16,8 @@
 extern crate log;
 use self::core::global;
 use self::core::global::ChainTypes;
-use self::core::libtx::slate::Slate;
 use self::keychain::ExtKeychain;
+use self::libwallet::slate::Slate;
 use self::wallet::libwallet;
 use self::wallet::libwallet::types::OutputStatus;
 use self::wallet::test_framework::{self, LocalWalletClient, WalletProxy};