diff --git a/src/domain/eth/mod.rs b/src/domain/eth/mod.rs
index dbd4539..29e2c9b 100644
--- a/src/domain/eth/mod.rs
+++ b/src/domain/eth/mod.rs
@@ -4,7 +4,7 @@ mod chain;
 
 pub use {
     self::chain::ChainId,
-    ethereum_types::{H160, H256, U256},
+    ethereum_types::{H160, U256},
 };
 
 /// A contract address.
diff --git a/src/domain/mod.rs b/src/domain/mod.rs
index 414298a..85cfd70 100644
--- a/src/domain/mod.rs
+++ b/src/domain/mod.rs
@@ -4,7 +4,6 @@ pub mod auction;
 pub mod dex;
 pub mod eth;
 pub mod liquidity;
-pub mod notification;
 pub mod order;
 pub mod solution;
 pub mod solver;
diff --git a/src/domain/notification.rs b/src/domain/notification.rs
deleted file mode 100644
index a04c554..0000000
--- a/src/domain/notification.rs
+++ /dev/null
@@ -1,59 +0,0 @@
-use {
-    super::{
-        auction,
-        eth::{self, Ether, TokenAddress},
-        solution::{self},
-    },
-    std::collections::BTreeSet,
-};
-
-type RequiredEther = Ether;
-type TokensUsed = BTreeSet<TokenAddress>;
-type TransactionHash = eth::H256;
-type Transaction = eth::Tx;
-type BlockNo = u64;
-pub type SimulationSucceededAtLeastOnce = bool;
-
-/// The notification about important events happened in driver, that solvers
-/// need to know about.
-#[derive(Debug)]
-pub struct Notification {
-    pub auction_id: auction::Id,
-    pub solution_id: Option<Id>,
-    pub kind: Kind,
-}
-
-#[derive(Debug, Clone)]
-pub enum Id {
-    Single(solution::Id),
-    Merged(Vec<u64>),
-}
-
-/// All types of notifications solvers can be informed about.
-#[derive(Debug)]
-pub enum Kind {
-    Timeout,
-    EmptySolution,
-    DuplicatedSolutionId,
-    SimulationFailed(BlockNo, Transaction, SimulationSucceededAtLeastOnce),
-    ScoringFailed(ScoreKind),
-    NonBufferableTokensUsed(TokensUsed),
-    SolverAccountInsufficientBalance(RequiredEther),
-    Settled(Settlement),
-    DriverError(String),
-    PostprocessingTimedOut,
-}
-
-/// The result of winning solver trying to settle the transaction onchain.
-#[derive(Debug)]
-pub enum Settlement {
-    Success(TransactionHash),
-    Revert(TransactionHash),
-    SimulationRevert,
-    Fail,
-}
-
-#[derive(Debug)]
-pub enum ScoreKind {
-    InvalidClearingPrices,
-}