diff --git a/src/entity/gateway/entitygateway.rs b/src/entity/gateway/entitygateway.rs
index dbdc401..4ec2c74 100644
--- a/src/entity/gateway/entitygateway.rs
+++ b/src/entity/gateway/entitygateway.rs
@@ -1,4 +1,6 @@
+use std::convert::From;
 use thiserror::Error;
+use futures::Future;
 
 use crate::entity::account::*;
 use crate::entity::character::*;
@@ -15,7 +17,35 @@ pub enum GatewayError {
 }
 
 #[async_trait::async_trait]
-pub trait EntityGateway: Send + Sync + Clone {
+pub trait EntityGatewayTransaction: Send + Sync {
+    fn gateway<'a>(&'a mut self) -> &'a mut dyn EntityGateway {
+        unimplemented!()
+    }
+
+    async fn commit(self: Box<Self>) -> Result<(), GatewayError> {
+        unimplemented!()
+    }
+}
+
+
+#[async_trait::async_trait]
+pub trait EntityGateway: Send + Sync {
+    async fn transaction(&'static mut self) -> Result<Box<dyn EntityGatewayTransaction + 'static>, GatewayError>
+    {
+        unimplemented!();
+    }
+
+    async fn with_transaction<F, Fut, R, E>(&'static mut self, _func: F) -> Result<R, E>
+    where
+        Fut: Future<Output = Result<(Box<dyn EntityGatewayTransaction>, R), E>> + Send,
+        F: FnOnce(Box<dyn EntityGatewayTransaction>) -> Fut + Send,
+        R: Send,
+        E: From<GatewayError>,
+        Self: Sized
+    {
+        unimplemented!();
+    }
+
     async fn create_user(&mut self, _user: NewUserAccountEntity) -> Result<UserAccountEntity, GatewayError> {
         unimplemented!()
     }
diff --git a/src/entity/gateway/inmemory.rs b/src/entity/gateway/inmemory.rs
index 4c38815..aa9762d 100644
--- a/src/entity/gateway/inmemory.rs
+++ b/src/entity/gateway/inmemory.rs
@@ -1,13 +1,43 @@
 use std::collections::BTreeMap;
 use std::convert::TryInto;
+use futures::Future;
 
 use crate::entity::account::*;
 use crate::entity::character::*;
-use crate::entity::gateway::{EntityGateway, GatewayError};
+use crate::entity::gateway::{EntityGateway, EntityGatewayTransaction, GatewayError};
 use crate::entity::item::*;
 
 use std::sync::{Arc, Mutex};
 
+
+pub struct InMemoryGatewayTransaction {
+    working_gateway: InMemoryGateway,
+    original_gateway: &'static mut InMemoryGateway,
+}
+
+#[async_trait::async_trait]
+impl EntityGatewayTransaction for InMemoryGatewayTransaction {
+    fn gateway<'b>(&'b mut self) -> &'b mut dyn EntityGateway {
+        &mut self.working_gateway
+    }
+
+    async fn commit(self: Box<Self>) -> Result<(), GatewayError> {
+        self.original_gateway.users = self.working_gateway.users.clone();
+        self.original_gateway.user_settings = self.working_gateway.user_settings.clone();
+        self.original_gateway.characters = self.working_gateway.characters.clone();
+        self.original_gateway.character_meseta = self.working_gateway.character_meseta.clone();
+        self.original_gateway.bank_meseta = self.working_gateway.bank_meseta.clone();
+        self.original_gateway.items = self.working_gateway.items.clone();
+        self.original_gateway.inventories = self.working_gateway.inventories.clone();
+        self.original_gateway.banks = self.working_gateway.banks.clone();
+        self.original_gateway.equips = self.working_gateway.equips.clone();
+        self.original_gateway.mag_modifiers = self.working_gateway.mag_modifiers.clone();
+        self.original_gateway.weapon_modifiers = self.working_gateway.weapon_modifiers.clone();
+
+        Ok(())
+    }
+}
+
 #[derive(Clone)]
 pub struct InMemoryGateway {
     users: Arc<Mutex<BTreeMap<UserAccountId, UserAccountEntity>>>,
@@ -99,6 +129,87 @@ impl InMemoryGateway {
 
 #[async_trait::async_trait]
 impl EntityGateway for InMemoryGateway {
+    async fn transaction(&'static mut self) -> Result<Box<dyn EntityGatewayTransaction + 'static>, GatewayError>
+    {
+        let working_gateway = {
+            let users = self.users.lock().unwrap().clone();
+            let user_settings = self.user_settings.lock().unwrap().clone();
+            let characters = self.characters.lock().unwrap().clone();
+            let character_meseta = self.character_meseta.lock().unwrap().clone();
+            let bank_meseta = self.bank_meseta.lock().unwrap().clone();
+            let items = self.items.lock().unwrap().clone();
+            let inventories = self.inventories.lock().unwrap().clone();
+            let banks = self.banks.lock().unwrap().clone();
+            let equips = self.equips.lock().unwrap().clone();
+            let mag_modifiers = self.mag_modifiers.lock().unwrap().clone();
+            let weapon_modifiers = self.weapon_modifiers.lock().unwrap().clone();
+
+            InMemoryGateway {
+                users: Arc::new(Mutex::new(users)),
+                user_settings: Arc::new(Mutex::new(user_settings)),
+                characters: Arc::new(Mutex::new(characters)),
+                character_meseta: Arc::new(Mutex::new(character_meseta)),
+                bank_meseta: Arc::new(Mutex::new(bank_meseta)),
+                items: Arc::new(Mutex::new(items)),
+                inventories: Arc::new(Mutex::new(inventories)),
+                banks: Arc::new(Mutex::new(banks)),
+                equips: Arc::new(Mutex::new(equips)),
+                mag_modifiers: Arc::new(Mutex::new(mag_modifiers)),
+                weapon_modifiers: Arc::new(Mutex::new(weapon_modifiers)),
+            }
+        };
+
+        Ok(Box::new(InMemoryGatewayTransaction {
+            working_gateway,
+            original_gateway: self,
+        }))
+    }
+
+
+    async fn with_transaction<F, Fut, R, E>(&'static mut self, func: F) -> Result<R, E>
+    where
+        Fut: Future<Output = Result<(Box<dyn EntityGatewayTransaction>, R), E>> + Send,
+        F: FnOnce(Box<dyn EntityGatewayTransaction>) -> Fut + Send,
+        R: Send,
+        E: From<GatewayError>,
+    {
+        let users = self.users.lock().unwrap().clone();
+        let user_settings = self.user_settings.lock().unwrap().clone();
+        let characters = self.characters.lock().unwrap().clone();
+        let character_meseta = self.character_meseta.lock().unwrap().clone();
+        let bank_meseta = self.bank_meseta.lock().unwrap().clone();
+        let items = self.items.lock().unwrap().clone();
+        let inventories = self.inventories.lock().unwrap().clone();
+        let banks = self.banks.lock().unwrap().clone();
+        let equips = self.equips.lock().unwrap().clone();
+        let mag_modifiers = self.mag_modifiers.lock().unwrap().clone();
+        let weapon_modifiers = self.weapon_modifiers.lock().unwrap().clone();
+
+        let working_gateway = InMemoryGateway {
+            users: Arc::new(Mutex::new(users)),
+            user_settings: Arc::new(Mutex::new(user_settings)),
+            characters: Arc::new(Mutex::new(characters)),
+            character_meseta: Arc::new(Mutex::new(character_meseta)),
+            bank_meseta: Arc::new(Mutex::new(bank_meseta)),
+            items: Arc::new(Mutex::new(items)),
+            inventories: Arc::new(Mutex::new(inventories)),
+            banks: Arc::new(Mutex::new(banks)),
+            equips: Arc::new(Mutex::new(equips)),
+            mag_modifiers: Arc::new(Mutex::new(mag_modifiers)),
+            weapon_modifiers: Arc::new(Mutex::new(weapon_modifiers)),
+        };
+
+        let transaction = Box::new(InMemoryGatewayTransaction {
+            working_gateway,
+            original_gateway: self,
+        });
+
+        let (mut transaction, result) = func(transaction).await?;
+
+        transaction.commit().await?;
+        Ok(result)
+    }
+
     async fn create_user(&mut self, user: NewUserAccountEntity) -> Result<UserAccountEntity, GatewayError> {
         let mut users = self.users.lock().unwrap();
         let id = users
diff --git a/src/entity/gateway/mod.rs b/src/entity/gateway/mod.rs
index d819ef5..4ce029d 100644
--- a/src/entity/gateway/mod.rs
+++ b/src/entity/gateway/mod.rs
@@ -2,6 +2,6 @@ pub mod entitygateway;
 pub mod inmemory;
 pub mod postgres;
 
-pub use entitygateway::{EntityGateway, GatewayError};
+pub use entitygateway::{EntityGateway, EntityGatewayTransaction, GatewayError};
 pub use inmemory::InMemoryGateway;
 pub use self::postgres::PostgresGateway;
diff --git a/src/entity/gateway/postgres/postgres.rs b/src/entity/gateway/postgres/postgres.rs
index 10961a5..b87dfad 100644
--- a/src/entity/gateway/postgres/postgres.rs
+++ b/src/entity/gateway/postgres/postgres.rs
@@ -1,14 +1,17 @@
+use async_std::sync::{Arc, Mutex};
 use std::convert::{From, TryFrom, Into};
-use futures::TryStreamExt;
+use futures::{Future, TryStreamExt};
 use async_std::stream::StreamExt;
 use libpso::character::guildcard;
 use crate::entity::account::*;
 use crate::entity::character::*;
-use crate::entity::gateway::{EntityGateway, GatewayError};
+use crate::entity::gateway::{EntityGateway, EntityGatewayTransaction, GatewayError};
 use crate::entity::item::*;
 use super::models::*;
 
 use sqlx::postgres::PgPoolOptions;
+use sqlx::Connection;
+
 
 mod embedded {
     use refinery::embed_migrations;
@@ -16,6 +19,24 @@ mod embedded {
 }
 
 
+pub struct PostgresTransaction<'t> {
+    pgtransaction: sqlx::Transaction<'t, sqlx::Postgres>,
+}
+
+
+#[async_trait::async_trait]
+impl<'t> EntityGatewayTransaction for PostgresTransaction<'t> {
+    fn gateway<'b>(&'b mut self) -> &'b mut dyn EntityGateway {
+        self
+    }
+
+    async fn commit(self: Box<Self>) -> Result<(), GatewayError> {
+        self.pgtransaction.commit().await?;
+        Ok(())
+    }
+}
+
+
 #[derive(Clone)]
 pub struct PostgresGateway {
     pool: sqlx::Pool<sqlx::Postgres>,
@@ -539,6 +560,28 @@ async fn get_bank_meseta(conn: &mut sqlx::PgConnection, char_id: &CharacterEntit
 
 #[async_trait::async_trait]
 impl EntityGateway for PostgresGateway {
+    async fn transaction(&'static mut self) -> Result<Box<dyn EntityGatewayTransaction + 'static>, GatewayError>
+    {
+        Ok(Box::new(PostgresTransaction {
+            pgtransaction: self.pool.begin().await?,
+        }))
+    }
+
+    async fn with_transaction<F, Fut, R, E>(&'static mut self, func: F) -> Result<R, E>
+    where
+        Fut: Future<Output = Result<(Box<dyn EntityGatewayTransaction>, R), E>> + Send,
+        F: FnOnce(Box<dyn EntityGatewayTransaction>) -> Fut + Send,
+        R: Send,
+        E: From<GatewayError>,
+    {
+        let mut transaction = Box::new(PostgresTransaction {
+            pgtransaction: self.pool.begin().await.map_err(|_| ()).unwrap()
+        });
+        let (mut transaction, result) = func(transaction).await.map_err(|_| ()).unwrap();
+        transaction.commit().await.map_err(|_| ()).unwrap();
+        Ok(result)
+    }
+
     async fn create_user(&mut self, user: NewUserAccountEntity) -> Result<UserAccountEntity, GatewayError> {
         create_user(&mut *self.pool.acquire().await?, user).await
     }
@@ -653,3 +696,118 @@ impl EntityGateway for PostgresGateway {
 }
 
 
+#[async_trait::async_trait]
+impl<'c> EntityGateway for PostgresTransaction<'c> {
+    async fn create_user(&mut self, user: NewUserAccountEntity) -> Result<UserAccountEntity, GatewayError> {
+        create_user(&mut *self.pgtransaction, user).await
+    }
+
+    async fn get_user_by_id(&mut self, id: UserAccountId) -> Result<UserAccountEntity, GatewayError> {
+        get_user_by_id(&mut *self.pgtransaction, id).await
+    }
+
+    async fn get_user_by_name(&mut self, username: String) -> Result<UserAccountEntity, GatewayError> {
+        get_user_by_name(&mut *self.pgtransaction, username).await
+    }
+
+    async fn save_user(&mut self, user: &UserAccountEntity) -> Result<(), GatewayError> {
+        save_user(&mut *self.pgtransaction, user).await
+    }
+
+    async fn create_user_settings(&mut self, settings: NewUserSettingsEntity) -> Result<UserSettingsEntity, GatewayError> {
+        create_user_settings(&mut *self.pgtransaction, settings).await
+    }
+
+    async fn get_user_settings_by_user(&mut self, user: &UserAccountEntity) -> Result<UserSettingsEntity, GatewayError> {
+        get_user_settings_by_user(&mut *self.pgtransaction, user).await
+    }
+
+    async fn save_user_settings(&mut self, settings: &UserSettingsEntity) -> Result<(), GatewayError> {
+        save_user_settings(&mut *self.pgtransaction, settings).await
+    }
+
+    async fn create_character(&mut self, char: NewCharacterEntity) -> Result<CharacterEntity, GatewayError> {
+        create_character(&mut *self.pgtransaction, char).await
+    }
+
+    async fn get_characters_by_user(&mut self, user: &UserAccountEntity) -> Result<[Option<CharacterEntity>; 4], GatewayError> {
+        get_characters_by_user(&mut *self.pgtransaction, user).await
+    }
+
+    async fn save_character(&mut self, char: &CharacterEntity) -> Result<(), GatewayError> {
+        save_character(&mut *self.pgtransaction, char).await
+    }
+
+    async fn get_guild_card_data_by_user(&mut self, user: &UserAccountEntity) -> Result<GuildCardDataEntity, GatewayError> {
+        Ok(GuildCardDataEntity {
+            id: GuildCardDataId(0),
+            user_id: user.id,
+            guildcard: guildcard::GuildCardData::default(),
+        })
+    }
+
+    async fn create_item(&mut self, item: NewItemEntity) -> Result<ItemEntity, GatewayError> {
+        create_item(&mut *self.pgtransaction, item).await
+    }
+
+    async fn add_item_note(&mut self, item_id: &ItemEntityId, item_note: ItemNote) -> Result<(), GatewayError> {
+        add_item_note(&mut *self.pgtransaction, item_id, item_note).await
+    }
+
+    async fn feed_mag(&mut self, mag_item_id: &ItemEntityId, tool_item_id: &ItemEntityId) -> Result<(), GatewayError> {
+        feed_mag(&mut *self.pgtransaction, mag_item_id, tool_item_id).await
+    }
+
+    async fn change_mag_owner(&mut self, mag_item_id: &ItemEntityId, character: &CharacterEntity) -> Result<(), GatewayError> {
+        change_mag_owner(&mut *self.pgtransaction, mag_item_id, character).await
+    }
+
+    async fn use_mag_cell(&mut self, mag_item_id: &ItemEntityId, mag_cell_id: &ItemEntityId) -> Result<(), GatewayError> {
+        use_mag_cell(&mut *self.pgtransaction, mag_item_id, mag_cell_id).await
+    }
+
+    async fn add_weapon_modifier(&mut self, item_id: &ItemEntityId, modifier: weapon::WeaponModifier) -> Result<(), GatewayError> {
+        add_weapon_modifier(&mut *self.pgtransaction, item_id, modifier).await
+    }
+
+    async fn get_character_inventory(&mut self, char_id: &CharacterEntityId) -> Result<InventoryEntity, GatewayError> {
+        get_character_inventory(&mut *self.pgtransaction, char_id).await
+    }
+
+    async fn get_character_bank(&mut self, char_id: &CharacterEntityId, bank_name: BankName) -> Result<BankEntity, GatewayError> {
+        get_character_bank(&mut *self.pgtransaction, char_id, bank_name).await
+    }
+
+    async fn set_character_inventory(&mut self, char_id: &CharacterEntityId, inventory: &InventoryEntity) -> Result<(), GatewayError> {
+        set_character_inventory(&mut *self.pgtransaction, char_id, inventory).await
+    }
+
+    async fn set_character_bank(&mut self, char_id: &CharacterEntityId, bank: &BankEntity, bank_name: BankName) -> Result<(), GatewayError> {
+        set_character_bank(&mut *self.pgtransaction, char_id, bank, bank_name).await
+    }
+
+    async fn get_character_equips(&mut self, char_id: &CharacterEntityId) -> Result<EquippedEntity, GatewayError> {
+        get_character_equips(&mut *self.pgtransaction, char_id).await
+    }
+
+    async fn set_character_equips(&mut self, char_id: &CharacterEntityId, equips: &EquippedEntity) -> Result<(), GatewayError> {
+        set_character_equips(&mut *self.pgtransaction, char_id, equips).await
+    }
+
+    async fn set_character_meseta(&mut self, char_id: &CharacterEntityId, meseta: Meseta) -> Result<(), GatewayError> {
+        set_character_meseta(&mut *self.pgtransaction, char_id, meseta).await
+    }
+
+    async fn get_character_meseta(&mut self, char_id: &CharacterEntityId) -> Result<Meseta, GatewayError> {
+        get_character_meseta(&mut *self.pgtransaction, char_id).await
+    }
+
+    async fn set_bank_meseta(&mut self, char_id: &CharacterEntityId, bank: BankName, meseta: Meseta) -> Result<(), GatewayError> {
+        set_bank_meseta(&mut *self.pgtransaction, char_id, bank, meseta).await
+    }
+
+    async fn get_bank_meseta(&mut self, char_id: &CharacterEntityId, bank: BankName) -> Result<Meseta, GatewayError> {
+        get_bank_meseta(&mut *self.pgtransaction, char_id, bank).await
+    }
+}
+