split into bank_core and server

2025-12-20 02:59:20 +01:00 · 2025-03-16 16:11:55 +01:00 · 2025-03-16 16:11:55 +01:00 · 2d3cc8edc1
commit 2d3cc8edc1
parent 0e90a4e2e4
24 changed files with 848 additions and 835 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -173,12 +173,28 @@ dependencies = [
 "windows-targets",
 ]

+[[package]]
+name = "bank_core"
+version = "0.1.0"
+dependencies = [
+ "axum",
+ "chrono",
+ "garde",
+ "http",
+ "regex",
+ "schemars",
+ "serde",
+ "serde_json",
+ "uuid",
+]
+
 [[package]]
 name = "bankserver"
 version = "0.1.0"
 dependencies = [
 "async-broadcast",
 "axum",
+ "bank_core",
 "chrono",
 "concread",
 "config",
@ -722,9 +738,9 @@ dependencies = [

 [[package]]
 name = "http"
-version = "1.2.0"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f16ca2af56261c99fba8bac40a10251ce8188205a4c448fbb745a2e4daa76fea"
+checksum = "f4a85d31aea989eead29a3aaf9e1115a180df8282431156e533de47660892565"
 dependencies = [
 "bytes",
 "fnv",
@ -1415,9 +1431,9 @@ dependencies = [

 [[package]]
 name = "serde_path_to_error"
-version = "0.1.16"
+version = "0.1.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af99884400da37c88f5e9146b7f1fd0fbcae8f6eec4e9da38b67d05486f814a6"
+checksum = "59fab13f937fa393d08645bf3a84bdfe86e296747b506ada67bb15f10f218b2a"
 dependencies = [
 "itoa",
 "serde",
--- a/Cargo.toml
+++ b/Cargo.toml
@ -1,3 +1,17 @@
+[workspace]
+members = [ "bank_core" ]
+
+[workspace.dependencies]
+chrono = { version = "0.4.40", features = ["serde"] }
+garde = { version = "0.22.0", features = ["serde", "derive", "regex", "pattern"] }
+http = "1.2"
+regex = "1.11.1"
+schemars = { version = "1.0.0-alpha.17", features = ["chrono04", "uuid1"] }
+serde = { version = "1.0.218", features = ["derive"] }
+serde_json = "1.0.139"
+uuid = { version = "1.15.1", features = ["serde", "v7"] }
+axum = { version = "0.8", default-features = false }
+
 [package]
 name = "bankserver"
 version = "0.1.0"
@ -5,33 +19,34 @@ edition = "2024"

 [features]
 default = ["schemas"]
-schemas = ["dep:schemars"]
+schemas = ["dep:schemars", "bank_core/schemas"]

 [[bin]]
 name = "generate-schemas"
-features = ["schemas"]
+required-features = ["schemas"]

 [dependencies]
 async-broadcast = "0.7.2"
-axum = { version = "0.8", features = ["ws"] }
-chrono = { version = "0.4.40", features = ["serde"] }
+axum = { workspace = true, features = ["form", "http1", "json", "matched-path", "query", "tokio", "tower-log", "tracing", "ws"] }
+chrono.workspace = true
 concread = { version = "0.5.4", default-features = false, features = ["ahash", "asynch", "maps"] }
 config = { version = "0.15.8", default-features = false }
 dbmigrator = { git = "https://github.com/DSeeLP/dbmigrator.git", branch = "macros", version = "0.4.4-alpha", features = ["tokio-postgres"] }
 deadpool = "0.12"
 deadpool-postgres = { version = "0.14", features = ["serde"] }
 futures-util = "0.3.31"
-garde = { version = "0.22.0", features = ["serde", "derive", "regex", "pattern"] }
+garde.workspace = true
 jsonwebtoken = { version = "9.3", default-features = false }
 password-auth = "1.0.0"
-regex = "1.11.1"
-schemars = { version = "1.0.0-alpha.17", optional = true, features = ["chrono04", "uuid1"] }
-serde = { version = "1.0.218", features = ["derive"] }
-serde_json = "1.0.139"
+regex.workspace = true
+schemars = { workspace = true, optional = true }
+serde.workspace = true
+serde_json.workspace = true
 serde_with = "3.12.0"
 tokio = { version = "1.43", features = ["tracing", "time", "sync", "net", "io-std", "io-util", "macros", "rt-multi-thread", "signal"] }
 tokio-postgres = { version = "0.7.13", features = ["with-chrono-0_4", "with-serde_json-1", "with-uuid-1"] }
 tracing = "0.1.41"
 tracing-error = "0.2.1"
 tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
-uuid = { version = "1.15.1", features = ["serde", "v7"] }
+uuid.workspace = true
+bank_core = { path = "./bank_core", features = ["axum"] }
--- a/bank_core/Cargo.toml
+++ b/bank_core/Cargo.toml
@ -0,0 +1,19 @@
+[package]
+name = "bank_core"
+version = "0.1.0"
+edition = "2024"
+
+[features]
+schemas = ["dep:schemars"]
+axum = ["dep:axum"]
+
+[dependencies]
+axum = { workspace = true, optional = true }
+chrono.workspace = true
+garde.workspace = true
+http.workspace = true
+regex.workspace = true
+schemars = { workspace = true, optional = true }
+serde.workspace = true
+serde_json.workspace = true
+uuid.workspace = true
--- a/bank_core/src/account.rs
+++ b/bank_core/src/account.rs
@ -0,0 +1,47 @@
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::{
+    make_schemas,
+    pagination::{Pagination, PaginationType},
+};
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct Account {
+    pub id: Uuid,
+    pub user: Uuid,
+    pub name: String,
+    pub balance: u64,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct AccountInfo {
+    pub id: Uuid,
+    pub user: Uuid,
+    pub name: String,
+}
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct UserAccountInfo {
+    pub id: Uuid,
+    pub name: String,
+    pub balance: u64,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct ReducedAccountInfo {
+    pub id: Uuid,
+    pub name: String,
+}
+
+impl PaginationType for UserAccountInfo {
+    const NAME: &str = "UserAccounts";
+}
+impl PaginationType for AccountInfo {
+    const NAME: &str = "Accounts";
+}
+
+make_schemas!((); (Account, AccountInfo, UserAccountInfo, Pagination<AccountInfo>, Pagination<UserAccountInfo>));
--- a/bank_core/src/chat.rs
+++ b/bank_core/src/chat.rs
@ -0,0 +1,58 @@
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::{
+    NameOrUuid, make_schemas,
+    pagination::{Pagination, PaginationType},
+};
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct Chat {
+    pub id: Uuid,
+    pub created: DateTime<Utc>,
+}
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct ChatInfo {
+    pub id: Uuid,
+    pub created: DateTime<Utc>,
+    pub read_until: Option<Uuid>,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct ChatMessage {
+    pub id: Uuid,
+    pub sender: Uuid,
+    pub time: DateTime<Utc>,
+    pub text: String,
+    pub extra: Option<serde_json::Value>,
+}
+
+impl PaginationType for Chat {
+    const NAME: &str = "Chats";
+}
+impl PaginationType for ChatInfo {
+    const NAME: &str = "ChatInfos";
+}
+
+impl PaginationType for ChatMessage {
+    const NAME: &str = "ChatMessages";
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct SendMessage {
+    pub text: String,
+    pub extra: Option<serde_json::Value>,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct StartChat {
+    pub user: NameOrUuid,
+}
+
+make_schemas!((StartChat, SendMessage); (Chat, ChatInfo, ChatMessage, Pagination<Chat>, Pagination<ChatInfo>, Pagination<ChatMessage>));
--- a/bank_core/src/error.rs
+++ b/bank_core/src/error.rs
@ -0,0 +1,61 @@
+use std::borrow::Cow;
+
+use http::StatusCode;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct ApiError<'a> {
+    #[serde(skip)]
+    pub status: StatusCode,
+    pub id: Cow<'a, str>,
+    pub message: Cow<'a, str>,
+}
+
+#[cfg(feature = "axum")]
+impl<'a> axum::response::IntoResponse for ApiError<'a> {
+    fn into_response(self) -> axum::response::Response {
+        (self.status, axum::Json(self)).into_response()
+    }
+}
+
+impl<'a> ApiError<'a> {
+    pub const NOT_FOUND: ApiError<'static> =
+        ApiError::const_new(StatusCode::NOT_FOUND, "not-found", "Not found");
+    pub const INTERNAL_SERVER_ERROR: ApiError<'static> = ApiError::const_new(
+        StatusCode::INTERNAL_SERVER_ERROR,
+        "internal-server-error",
+        "Internal Server Error",
+    );
+    pub const FORBIDDEN: ApiError<'static> =
+        ApiError::const_new(StatusCode::FORBIDDEN, "forbidden", "Forbidden");
+
+    pub const CONFLICT: ApiError<'static> =
+        ApiError::const_new(StatusCode::CONFLICT, "conflict", "Conflict");
+    pub const fn const_new(status: StatusCode, id: &'static str, message: &'static str) -> Self {
+        Self {
+            status,
+            id: Cow::Borrowed(id),
+            message: Cow::Borrowed(message),
+        }
+    }
+    pub fn new(
+        status: StatusCode,
+        id: impl Into<Cow<'a, str>>,
+        message: impl Into<Cow<'a, str>>,
+    ) -> Self {
+        Self {
+            status,
+            id: id.into(),
+            message: message.into(),
+        }
+    }
+    pub fn into_static(self) -> ApiError<'static> {
+        ApiError {
+            status: self.status,
+            id: Cow::Owned(self.id.into_owned()),
+            message: Cow::Owned(self.message.into_owned()),
+        }
+    }
+}
--- a/bank_core/src/lib.rs
+++ b/bank_core/src/lib.rs
@ -0,0 +1,13 @@
+pub mod account;
+pub mod chat;
+pub mod pagination;
+mod schemas;
+pub mod transaction;
+pub mod user;
+pub use schemas::*;
+mod error;
+mod util;
+pub use error::*;
+pub use util::*;
+
+make_schemas!((Credentials); (ApiError, TokenResponse), [account::schemas, chat::schemas, transaction::schemas, user::schemas]);
--- a/bank_core/src/pagination.rs
+++ b/bank_core/src/pagination.rs
@ -0,0 +1,152 @@
+use serde::{Deserialize, Deserializer, Serialize};
+
+pub trait PaginationType {
+    const NAME: &str;
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct RequestPagination {
+    #[serde(deserialize_with = "deserialize_u64")]
+    pub limit: u64,
+    #[serde(default)]
+    #[serde(deserialize_with = "deserialize_u64")]
+    pub offset: u64,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+#[serde(rename = "Pagination")]
+pub struct PaginationMeta {
+    pub total: u64,
+    pub limit: u64,
+    pub offset: u64,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+pub struct Pagination<T> {
+    pub pagination: PaginationMeta,
+    pub result: Vec<T>,
+}
+
+impl<T> Pagination<T> {
+    pub fn new(result: Vec<T>, total: u64, pagination: RequestPagination) -> Self {
+        Self {
+            pagination: PaginationMeta {
+                total,
+                limit: pagination.limit,
+                offset: pagination.offset,
+            },
+            result,
+        }
+    }
+}
+
+#[cfg(feature = "schemas")]
+impl<T: PaginationType + schemars::JsonSchema> schemars::JsonSchema for Pagination<T> {
+    fn schema_name() -> std::borrow::Cow<'static, str> {
+        format!("Paginated{}", T::NAME).into()
+    }
+
+    fn schema_id() -> std::borrow::Cow<'static, str> {
+        std::borrow::Cow::Borrowed(std::any::type_name::<Self>())
+    }
+
+    fn json_schema(generator: &mut schemars::SchemaGenerator) -> schemars::Schema {
+        let result_schema = generator.subschema_for::<Vec<T>>();
+        let pagination_schema = generator.subschema_for::<PaginationMeta>();
+        schemars::Schema::try_from(serde_json::json!({
+           "type": "object",
+           "properties": {
+               "pagination": pagination_schema,
+               "result": result_schema
+           },
+           "required": ["pagination", "result"]
+        }))
+        .unwrap()
+    }
+}
+
+macro_rules! visit {
+    (signed $ty:ident : $visit:ident) => {
+        #[inline]
+        fn $visit<E>(self, v: $ty) -> Result<Self::Value, E>
+        where
+            E: serde::de::Error,
+        {
+            if 0 <= v && v as u64 <= Self::Value::max_value() as u64 {
+                Ok(v as Self::Value)
+            } else {
+                Err(E::invalid_value(
+                    serde::de::Unexpected::Signed(v as i64),
+                    &self,
+                ))
+            }
+        }
+    };
+    ($ty:ident : $visit:ident) => {
+        #[inline]
+        fn $visit<E>(self, v: $ty) -> Result<Self::Value, E>
+        where
+            E: serde::de::Error,
+        {
+            if v as u64 <= Self::Value::max_value() as u64 {
+                Ok(v as Self::Value)
+            } else {
+                Err(E::invalid_value(
+                    serde::de::Unexpected::Unsigned(v as u64),
+                    &self,
+                ))
+            }
+        }
+    };
+}
+
+fn deserialize_u64<'de, D>(deserializer: D) -> Result<u64, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    struct Helper;
+    impl<'a> serde::de::Visitor<'a> for Helper {
+        type Value = u64;
+
+        fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+            formatter.write_str("a u64")
+        }
+
+        visit!(signed i8: visit_i8);
+        visit!(signed i16: visit_i16);
+        visit!(signed i32: visit_i32);
+        visit!(signed i64: visit_i64);
+
+        visit!(u8: visit_u8);
+        visit!(u16: visit_u16);
+        visit!(u32: visit_u32);
+        visit!(u64: visit_u64);
+
+        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+        where
+            E: serde::de::Error,
+        {
+            match v.parse() {
+                Ok(value) => Ok(value),
+                Err(_) => Err(E::invalid_value(
+                    serde::de::Unexpected::Str(v),
+                    &"valid unsigned integer",
+                )),
+            }
+        }
+    }
+    deserializer.deserialize_any(Helper)
+}
+
+impl RequestPagination {
+    #[inline]
+    pub const fn limit(&self) -> i64 {
+        self.limit as i64
+    }
+    #[inline]
+    pub const fn offset(&self) -> i64 {
+        self.offset as i64
+    }
+}
--- a/bank_core/src/schemas.rs
+++ b/bank_core/src/schemas.rs
@ -0,0 +1,95 @@
+#[macro_export]
+macro_rules! make_schemas {
+    (($($request_bodies:ty),*); ($($response_bodies:ty),*)$(, [$($deps:expr),*])? ) => {
+        #[cfg(feature = "schemas")]
+        #[allow(unused)]
+        pub const fn schemas() -> $crate::Schemas {
+            fn request_bodies(generator: &mut schemars::SchemaGenerator, schemas: &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>) {
+                $(
+                    generator.subschema_for::<$request_bodies>();
+                    // schemas.insert(<$request_bodies as schemars::JsonSchema>::schema_name(), generator.root_schema_for::<$request_bodies>());
+                )*
+            }
+            fn response_bodies(generator: &mut schemars::SchemaGenerator, schemas: &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>) {
+                $(
+                    generator.subschema_for::<$response_bodies>();
+                    // schemas.insert(<$response_bodies as schemars::JsonSchema>::schema_name(), generator.root_schema_for::<$response_bodies>());
+                )*
+            }
+            static DEPS: &'static [$crate::Schemas] = &[$($($deps()),*)?];
+            $crate::Schemas {
+                request_bodies,
+                response_bodies,
+                contains: DEPS
+            }
+        }
+        #[cfg(not(feature = "schemas"))]
+        pub const fn schemas() -> $crate::Schemas {
+            #[allow(unused)]
+            const fn test<T>() {}
+            $(
+                test::<$request_bodies>();
+            )*
+            $(
+                test::<$response_bodies>();
+            )*
+            const _DEPS: &'static [$crate::Schemas] = &[$($($deps()),*)?];
+            $crate::Schemas
+        }
+    };
+    ([$($deps:expr),*]) => {
+        #[cfg(feature = "schemas")]
+        pub const fn schemas() -> $crate::Schemas {
+            fn ident(_: &mut schemars::SchemaGenerator, _: &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>) {}
+            static DEPS: &'static [$crate::Schemas] = &[$($deps()),*];
+            $crate::Schemas {
+                request_bodies: ident,
+                response_bodies: ident,
+                contains: DEPS
+            }
+        }
+        #[cfg(not(feature = "schemas"))]
+        pub const fn schemas() -> $crate::Schemas {
+            const _DEPS: &'static [$crate::Schemas] = &[$($deps()),*];
+            $crate::Schemas
+        }
+    };
+}
+
+#[cfg(not(feature = "schemas"))]
+pub struct Schemas;
+#[cfg(feature = "schemas")]
+pub struct Schemas {
+    pub request_bodies: fn(
+        &mut schemars::SchemaGenerator,
+        &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>,
+    ),
+    pub response_bodies: fn(
+        &mut schemars::SchemaGenerator,
+        &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>,
+    ),
+    pub contains: &'static [Self],
+}
+
+#[cfg(feature = "schemas")]
+impl Schemas {
+    pub fn generate(
+        &self,
+        requests: &mut schemars::SchemaGenerator,
+        responses: &mut schemars::SchemaGenerator,
+        request_schemas: &mut std::collections::HashMap<
+            std::borrow::Cow<'static, str>,
+            schemars::Schema,
+        >,
+        response_schemas: &mut std::collections::HashMap<
+            std::borrow::Cow<'static, str>,
+            schemars::Schema,
+        >,
+    ) {
+        for schemas in self.contains {
+            schemas.generate(requests, responses, request_schemas, response_schemas);
+        }
+        (self.request_bodies)(requests, request_schemas);
+        (self.response_bodies)(requests, response_schemas);
+    }
+}
--- a/bank_core/src/transaction.rs
+++ b/bank_core/src/transaction.rs
@ -0,0 +1,58 @@
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::{
+    account::ReducedAccountInfo,
+    make_schemas,
+    pagination::{Pagination, PaginationType, RequestPagination},
+    user::User,
+};
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct Transaction {
+    pub from: Uuid,
+    pub to: Uuid,
+    pub amount: u64,
+    pub timestamp: DateTime<Utc>,
+    pub message: Option<String>,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct FullTransaction {
+    pub from: Participant,
+    pub to: Participant,
+    pub amount: u64,
+    pub timestamp: DateTime<Utc>,
+    pub message: Option<String>,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+#[serde(rename_all = "lowercase")]
+pub enum Direction {
+    Received,
+    Sent,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct Participant {
+    pub user: User,
+    pub account: ReducedAccountInfo,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+pub struct TransactionQuery {
+    #[serde(flatten)]
+    pub pagination: RequestPagination,
+    pub direction: Option<Direction>,
+}
+
+impl PaginationType for FullTransaction {
+    const NAME: &str = "Transactions";
+}
+
+make_schemas!((Direction); (Transaction, FullTransaction, Pagination<FullTransaction>));
--- a/bank_core/src/user.rs
+++ b/bank_core/src/user.rs
@ -0,0 +1,33 @@
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use crate::{
+    account::UserAccountInfo,
+    make_schemas,
+    pagination::{Pagination, PaginationType},
+};
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct User {
+    pub id: Uuid,
+    pub name: String,
+}
+
+impl PaginationType for User {
+    const NAME: &str = "UserList";
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct UserAccounts {
+    pub result: Vec<UserAccountInfo>,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct UserBalance {
+    pub balance: u64,
+}
+
+make_schemas!((); (User, Pagination<User>, UserAccounts, UserBalance));
--- a/bank_core/src/util.rs
+++ b/bank_core/src/util.rs
@ -0,0 +1,65 @@
+use std::{ops::Deref, sync::LazyLock};
+
+use garde::Validate;
+use regex::Regex;
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+static NAME_PATTERN_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(NAME_PATTERN).unwrap());
+
+pub const NAME_PATTERN: &str = "^[a-z0-9_-]+$";
+pub const USER_ACCOUNT_PATTERN: &str = "([a-z0-9_-]+):([a-z0-9_-]+)";
+
+#[derive(Debug, Clone, PartialEq, Eq, Validate, Serialize, Deserialize)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+#[garde(transparent)]
+pub struct Name(#[garde(length(min = 3, max = 32), pattern(NAME_PATTERN_RE))] pub String);
+
+impl Deref for Name {
+    type Target = str;
+
+    fn deref(&self) -> &Self::Target {
+        self.0.as_str()
+    }
+}
+impl Name {
+    pub fn into_inner(self) -> String {
+        self.0
+    }
+
+    pub fn validate_name(name: &str) -> Result<(), garde::Error> {
+        garde::rules::pattern::apply(&name, (&NAME_PATTERN_RE,))
+    }
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, Validate, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+#[serde(untagged)]
+pub enum NameOrUuid {
+    Id(#[garde(skip)] Uuid),
+    Name(#[garde(dive)] Name),
+}
+
+#[derive(Clone, Deserialize, Serialize, Validate, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct Credentials {
+    #[garde(dive)]
+    pub name: Name,
+    #[garde(length(min = 8, max = 96))]
+    pub password: String,
+}
+
+impl std::fmt::Debug for Credentials {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("Credentials")
+            .field("name", &self.name)
+            .field("password", &"...")
+            .finish()
+    }
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
+#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
+pub struct TokenResponse {
+    pub token: String,
+}
--- a/src/api/account.rs
+++ b/src/api/account.rs
@ -1,18 +1,18 @@
 use std::sync::Arc;

 use axum::{Router, extract::Path, routing::get};
+use bank_core::{
+    ApiError,
+    account::AccountInfo,
+    pagination::Pagination,
+    transaction::{FullTransaction, TransactionQuery},
+};
 use tracing::instrument;
 use uuid::Uuid;

-use crate::{
-    api::{ApiError, Pagination},
-    model::{Account, AccountInfo, FullTransaction, Transaction},
-};
+use crate::model::{Accounts, Transactions};

-use super::{
-    AppState, EState, Error, Json, Query, RequestPagination, State, auth::Auth, make_schemas,
-    transactions::TransactionQuery,
-};
+use super::{AppState, EState, Error, Json, PaginationQuery, Query, State, auth::Auth};

 pub(super) fn router() -> Router<Arc<AppState>> {
    Router::new()
@ -21,8 +21,6 @@ pub(super) fn router() -> Router<Arc<AppState>> {
        .route("/{id}/transactions", get(account_transactions))
 }

-make_schemas!((); (Pagination<AccountInfo>));
-
 #[instrument(skip(state))]
 pub async fn account_info(EState(state): State, _: Auth, Path(id): Path<Uuid>) {}

@ -37,14 +35,14 @@ pub async fn account_transactions(
    }): Query<TransactionQuery>,
 ) -> Result<Json<Pagination<FullTransaction>>, Error> {
    let conn = state.conn().await?;
-    match Account::owned_by(&conn, id, auth.user_id()).await? {
+    match Accounts::owned_by(&conn, id, auth.user_id()).await? {
        Some(false) => {
            return Err(ApiError::FORBIDDEN.into());
        }
        None => return Err(ApiError::NOT_FOUND.into()),
        _ => {}
    }
-    let result = Transaction::account_history(&conn, id, direction, pagination).await?;
+    let result = Transactions::account_history(&conn, id, direction, pagination).await?;

    Ok(Json(result))
 }
@ -53,9 +51,9 @@ pub async fn account_transactions(
 pub async fn list_accounts(
    EState(state): State,
    _: Auth,
-    pagination: RequestPagination,
+    PaginationQuery(pagination): PaginationQuery,
 ) -> Result<Json<Pagination<AccountInfo>>, Error> {
    let conn = state.conn().await?;
-    let result = Account::list_all(&conn, pagination).await?;
+    let result = Accounts::list_all(&conn, pagination).await?;
    Ok(Json(result))
 }
--- a/src/api/auth.rs
+++ b/src/api/auth.rs
@ -6,23 +6,20 @@ use std::{

 use axum::{
    Router,
-    extract::{FromRef, FromRequestParts},
+    extract::FromRequestParts,
    http::{StatusCode, request::Parts},
    routing::post,
 };
-use garde::Validate;
+use bank_core::{ApiError, Credentials, TokenResponse};
 use jsonwebtoken::{Algorithm, Header, Validation};
 use password_auth::verify_password;
 use serde::{Deserialize, Serialize};
 use tracing::instrument;
 use uuid::Uuid;

-use crate::{
-    api::{ApiError, InnerError},
-    model::{Name, User},
-};
+use crate::{api::InnerError, model::Users};

-use super::{AppState, EState, Error, Json, State, make_schemas};
+use super::{AppState, EState, Error, Json, State};

 pub(super) fn router() -> Router<Arc<AppState>> {
    Router::new()
@ -30,33 +27,13 @@ pub(super) fn router() -> Router<Arc<AppState>> {
        .route("/login", post(login))
 }

-make_schemas!((Credentials); (TokenResponse));
-
-#[derive(Deserialize, Validate)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct Credentials {
-    #[garde(dive)]
-    pub name: Name,
-    #[garde(length(min = 8, max = 96))]
-    pub password: String,
-}
-
-impl std::fmt::Debug for Credentials {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("Credentials")
-            .field("name", &self.name)
-            .field("password", &"...")
-            .finish()
-    }
-}
-
 #[instrument(skip(state))]
 async fn register(
    EState(state): State,
    Json(credentials): Json<Credentials>,
 ) -> Result<(StatusCode, Json<TokenResponse>), Error> {
    let mut conn = state.conn().await?;
-    let id = User::create(&mut conn, &credentials.name, &credentials.password).await?;
+    let id = Users::create(&mut conn, &credentials.name, &credentials.password).await?;
    let token = Claims::new(id).encode(&state.encoding_key).unwrap();
    Ok((StatusCode::CREATED, Json(TokenResponse { token })))
 }
@ -68,7 +45,7 @@ async fn login(
 ) -> Result<Json<TokenResponse>, Error> {
    let conn = state.conn().await?;
    let Some((hash, info)) =
-        User::get_password_and_info_by_username(&conn, &credentials.name).await?
+        Users::get_password_and_info_by_username(&conn, &credentials.name).await?
    else {
        return Err(invalid_username_or_password().into());
    };
@ -82,12 +59,6 @@ async fn login(
    Ok(Json(TokenResponse { token: jwt }))
 }

-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct TokenResponse {
-    token: String,
-}
-
 #[derive(Serialize, Deserialize)]
 struct Claims<'a> {
    #[serde(rename = "iss")]
--- a/src/api/chats.rs
+++ b/src/api/chats.rs
@ -1,22 +1,21 @@
 use std::sync::Arc;

 use axum::{Router, extract::Path, routing::get};
+use bank_core::{
+    ApiError,
+    chat::{Chat, ChatInfo, ChatMessage, SendMessage, StartChat},
+    pagination::Pagination,
+};
 use deadpool_postgres::GenericClient;
-use serde::Deserialize;
 use tracing::instrument;
 use uuid::Uuid;

-use crate::{
-    api::ApiError,
-    model::{Chat, ChatInfo, ChatMessage},
-};
+use crate::model::{Chats, NameOrUuidExt};

 use super::{
-    AppState, EState, Error, Json, Pagination, RequestPagination, State,
+    AppState, EState, Error, Json, PaginationQuery, State,
    auth::Auth,
-    make_schemas,
    socket::{SocketEvent, SocketMessage},
-    transactions::NameOrUuid,
 };

 pub(super) fn router() -> Router<Arc<AppState>> {
@ -26,32 +25,17 @@ pub(super) fn router() -> Router<Arc<AppState>> {
        .route("/{id}/messages", get(get_messages).post(send_message))
 }

-make_schemas!((StartChat, SendMessage); (Pagination<Chat>, Pagination<ChatInfo>, Pagination<ChatMessage>));
-
 #[instrument(skip(state))]
 pub async fn list_chats(
    EState(state): State,
    auth: Auth,
-    pagination: RequestPagination,
+    PaginationQuery(pagination): PaginationQuery,
 ) -> Result<Json<Pagination<Chat>>, Error> {
    let client = state.conn().await?;
-    let chats = Chat::list_for_user(&client, auth.user_id(), pagination).await?;
+    let chats = Chats::list_for_user(&client, auth.user_id(), pagination).await?;
    Ok(Json(chats))
 }

-#[derive(Deserialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct SendMessage {
-    pub text: String,
-    pub extra: Option<serde_json::Value>,
-}
-
-#[derive(Debug, Deserialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct StartChat {
-    pub user: NameOrUuid,
-}
-
 #[instrument(skip(state))]
 pub async fn create_chat(
    EState(state): State,
@ -62,7 +46,7 @@ pub async fn create_chat(
    let Some(target) = body.user.user_id(&client).await? else {
        return Err(ApiError::NOT_FOUND.into());
    };
-    let chat = Chat::start(&mut client, auth.user_id(), target).await?;
+    let chat = Chats::start(&mut client, auth.user_id(), target).await?;
    Ok(Json(chat))
 }

@ -74,7 +58,7 @@ pub async fn get_chat(
 ) -> Result<Json<ChatInfo>, Error> {
    let client = state.conn().await?;
    check_chat(&client, id, auth.user_id()).await?;
-    let Some(chat) = Chat::get_by_id_for_user(&client, id, auth.user_id()).await? else {
+    let Some(chat) = Chats::get_by_id_for_user(&client, id, auth.user_id()).await? else {
        return Err(ApiError::NOT_FOUND.into());
    };
    Ok(Json(chat))
@ -85,16 +69,16 @@ pub async fn get_messages(
    EState(state): State,
    auth: Auth,
    Path(id): Path<Uuid>,
-    pagination: RequestPagination,
+    PaginationQuery(pagination): PaginationQuery,
 ) -> Result<Json<Pagination<ChatMessage>>, Error> {
    let client = state.conn().await?;
    check_chat(&client, id, auth.user_id()).await?;
-    let messages = Chat::messages(&client, id, pagination).await?;
+    let messages = Chats::messages(&client, id, pagination).await?;
    Ok(Json(messages))
 }

 async fn check_chat(client: &impl GenericClient, id: Uuid, user: Uuid) -> Result<(), Error> {
-    match Chat::exists_and_has_access(client, id, user).await? {
+    match Chats::exists_and_has_access(client, id, user).await? {
        Some(true) => Ok(()),
        Some(false) => Err(ApiError::FORBIDDEN.into()),
        None => Err(ApiError::NOT_FOUND.into()),
@ -110,13 +94,13 @@ pub async fn send_message(
 ) -> Result<Json<ChatMessage>, Error> {
    let mut client = state.conn().await?;
    check_chat(&client, id, auth.user_id()).await?;
-    let message = Chat::send(&mut client, id, auth.user_id(), body.text, body.extra).await?;
+    let message = Chats::send(&mut client, id, auth.user_id(), body.text, body.extra).await?;
    let notfication = SocketMessage::Event(SocketEvent::MessageReceived {
        chat: id,
        from: auth.user_id(),
        message_id: message.id,
    });
-    for id in Chat::member_ids(&client, id).await? {
+    for id in Chats::member_ids(&client, id).await? {
        if id == auth.user_id() {
            continue;
        }
--- a/src/api/mod.rs
+++ b/src/api/mod.rs
@ -7,9 +7,9 @@ use axum::{
    response::IntoResponse,
 };

+use bank_core::{ApiError, make_schemas, pagination::RequestPagination};
 use jsonwebtoken::{DecodingKey, EncodingKey};
-use schemars::{JsonSchema, Schema};
-use serde::{Deserialize, Deserializer, Serialize, de::DeserializeOwned};
+use serde::{Deserialize, Serialize, de::DeserializeOwned};
 use tracing_error::SpanTrace;

 pub use axum::extract::State as EState;
@ -30,7 +30,7 @@ pub struct Json<T>(T);
 macro_rules! rejection_error {
    ($id:expr, $rejection:expr) => {{
        let rejection = $rejection;
-        $crate::api::ApiError {
+        bank_core::ApiError {
            status: rejection.status(),
            id: Cow::Borrowed($id),
            message: Cow::Owned(rejection.body_text()),
@ -82,6 +82,7 @@ impl<T: DeserializeOwned, S: Send + Sync> FromRequestParts<S> for Query<T> {
 }

 pub struct Error {
+    #[allow(unused)]
    trace: Option<SpanTrace>,
    inner: InnerError,
 }
@ -95,58 +96,6 @@ pub enum InnerError {
    Validation(ValidationErrors),
 }

-#[derive(Debug, Clone, Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct ApiError<'a> {
-    #[serde(skip)]
-    pub status: StatusCode,
-    pub id: Cow<'a, str>,
-    pub message: Cow<'a, str>,
-}
-
-impl<'a> ApiError<'a> {
-    pub const NOT_FOUND: ApiError<'static> =
-        ApiError::const_new(StatusCode::NOT_FOUND, "not-found", "Not found");
-    pub const INTERNAL_SERVER_ERROR: ApiError<'static> = ApiError::const_new(
-        StatusCode::INTERNAL_SERVER_ERROR,
-        "internal-server-error",
-        "Internal Server Error",
-    );
-    pub const FORBIDDEN: ApiError<'static> =
-        ApiError::const_new(StatusCode::FORBIDDEN, "forbidden", "Forbidden");
-    pub const fn const_new(status: StatusCode, id: &'static str, message: &'static str) -> Self {
-        Self {
-            status,
-            id: Cow::Borrowed(id),
-            message: Cow::Borrowed(message),
-        }
-    }
-    pub fn new(
-        status: StatusCode,
-        id: impl Into<Cow<'a, str>>,
-        message: impl Into<Cow<'a, str>>,
-    ) -> Self {
-        Self {
-            status,
-            id: id.into(),
-            message: message.into(),
-        }
-    }
-    pub fn into_static(self) -> ApiError<'static> {
-        ApiError {
-            status: self.status,
-            id: Cow::Owned(self.id.into_owned()),
-            message: Cow::Owned(self.message.into_owned()),
-        }
-    }
-}
-
-impl<'a> IntoResponse for ApiError<'a> {
-    fn into_response(self) -> axum::response::Response {
-        (self.status, axum::Json(self)).into_response()
-    }
-}
-
 impl Error {
    pub fn new(inner: InnerError) -> Self {
        let trace = if cfg!(debug_assertions) || inner.internal() {
@ -228,12 +177,13 @@ struct ValidationError {
    message: String,
 }

+#[cfg(feature = "schemas")]
 impl schemars::JsonSchema for ValidationError {
    fn schema_name() -> Cow<'static, str> {
        Cow::Borrowed("SingleValidationError")
    }

-    fn json_schema(_: &mut schemars::SchemaGenerator) -> Schema {
+    fn json_schema(_: &mut schemars::SchemaGenerator) -> schemars::Schema {
        schemars::Schema::try_from(serde_json::json!({
            "type": "object",
            "properties": {
@ -336,253 +286,19 @@ pub fn router() -> Router<Arc<AppState>> {
        .nest("/socket", socket::router())
 }

-make_schemas!((); (ApiError, _ValidationErrors), [crate::model::schemas, auth::schemas, user::schemas, transactions::schemas, account::schemas, chats::schemas]);
+make_schemas!((); (ApiError, _ValidationErrors), [ bank_core::schemas, transactions::schemas]);

-macro_rules! make_schemas {
-    (($($request_bodies:ty),*); ($($response_bodies:ty),*)$(, [$($deps:expr),*])? ) => {
-        #[cfg(feature = "schemas")]
-        #[allow(unused)]
-        pub const fn schemas() -> $crate::api::Schemas {
-            fn request_bodies(generator: &mut schemars::SchemaGenerator, schemas: &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>) {
-                $(
-                    generator.subschema_for::<$request_bodies>();
-                    // schemas.insert(<$request_bodies as schemars::JsonSchema>::schema_name(), generator.root_schema_for::<$request_bodies>());
-                )*
-            }
-            fn response_bodies(generator: &mut schemars::SchemaGenerator, schemas: &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>) {
-                $(
-                    generator.subschema_for::<$response_bodies>();
-                    // schemas.insert(<$response_bodies as schemars::JsonSchema>::schema_name(), generator.root_schema_for::<$response_bodies>());
-                )*
-            }
-            static DEPS: &'static [$crate::api::Schemas] = &[$($($deps()),*)?];
-            $crate::api::Schemas {
-                request_bodies,
-                response_bodies,
-                contains: DEPS
-            }
-        }
-        #[cfg(not(feature = "schemas"))]
-        pub const fn schemas() -> $crate::api::Schemas {
-            $crate::api::Schemas
-        }
-    };
-    ([$($deps:expr),*]) => {
-        #[cfg(feature = "schemas")]
-        pub const fn schemas() -> $crate::api::Schemas {
-            fn ident(_: &mut schemars::SchemaGenerator, _: &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>) {}
-            static DEPS: &'static [$crate::api::Schemas] = &[$($deps()),*];
-            $crate::api::Schemas {
-                request_bodies: ident,
-                response_bodies: ident,
-                contains: DEPS
-            }
-        }
-        #[cfg(not(feature = "schemas"))]
-        pub const fn schemas() -> $crate::api::Schemas {
-            $crate::api::Schemas
-        }
-    };
-}
+#[derive(Deserialize)]
+#[repr(transparent)]
+#[serde(transparent)]
+pub struct PaginationQuery(pub RequestPagination);

-pub(crate) use make_schemas;
-use uuid::Uuid;
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct RequestPagination {
-    #[serde(deserialize_with = "deserialize_u64")]
-    pub limit: u64,
-    #[serde(default)]
-    #[serde(deserialize_with = "deserialize_u64")]
-    pub offset: u64,
-}
-
-macro_rules! visit {
-    (signed $ty:ident : $visit:ident) => {
-        #[inline]
-        fn $visit<E>(self, v: $ty) -> Result<Self::Value, E>
-        where
-            E: serde::de::Error,
-        {
-            if 0 <= v && v as u64 <= Self::Value::max_value() as u64 {
-                Ok(v as Self::Value)
-            } else {
-                Err(E::invalid_value(
-                    serde::de::Unexpected::Signed(v as i64),
-                    &self,
-                ))
-            }
-        }
-    };
-    ($ty:ident : $visit:ident) => {
-        #[inline]
-        fn $visit<E>(self, v: $ty) -> Result<Self::Value, E>
-        where
-            E: serde::de::Error,
-        {
-            if v as u64 <= Self::Value::max_value() as u64 {
-                Ok(v as Self::Value)
-            } else {
-                Err(E::invalid_value(
-                    serde::de::Unexpected::Unsigned(v as u64),
-                    &self,
-                ))
-            }
-        }
-    };
-}
-
-fn deserialize_u64<'de, D>(deserializer: D) -> Result<u64, D::Error>
-where
-    D: Deserializer<'de>,
-{
-    struct Helper;
-    impl<'a> serde::de::Visitor<'a> for Helper {
-        type Value = u64;
-
-        fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
-            formatter.write_str("a u64")
-        }
-
-        visit!(signed i8: visit_i8);
-        visit!(signed i16: visit_i16);
-        visit!(signed i32: visit_i32);
-        visit!(signed i64: visit_i64);
-
-        visit!(u8: visit_u8);
-        visit!(u16: visit_u16);
-        visit!(u32: visit_u32);
-        visit!(u64: visit_u64);
-
-        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
-        where
-            E: serde::de::Error,
-        {
-            match v.parse() {
-                Ok(value) => Ok(value),
-                Err(_) => Err(E::invalid_value(
-                    serde::de::Unexpected::Str(v),
-                    &"valid unsigned integer",
-                )),
-            }
-        }
-    }
-    deserializer.deserialize_any(Helper)
-}
-
-impl<S: Send + Sync> FromRequestParts<S> for RequestPagination {
+impl<S: Send + Sync> FromRequestParts<S> for PaginationQuery {
    type Rejection = ApiError<'static>;

    async fn from_request_parts(parts: &mut Parts, state: &S) -> Result<Self, Self::Rejection> {
        Query::<RequestPagination>::from_request_parts(parts, state)
            .await
-            .map(|query| query.0)
-    }
-}
-
-impl RequestPagination {
-    #[inline]
-    pub const fn limit(&self) -> i64 {
-        self.limit as i64
-    }
-    #[inline]
-    pub const fn offset(&self) -> i64 {
-        self.offset as i64
-    }
-}
-
-#[derive(Debug, Clone, Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-#[serde(rename = "Pagination")]
-pub struct PaginationMeta {
-    pub total: u64,
-    pub limit: u64,
-    pub offset: u64,
-}
-
-#[derive(Debug, Clone, Serialize)]
-// #[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct Pagination<T> {
-    pub pagination: PaginationMeta,
-    pub result: Vec<T>,
-}
-
-impl<T> Pagination<T> {
-    pub fn new(result: Vec<T>, total: u64, pagination: RequestPagination) -> Self {
-        Self {
-            pagination: PaginationMeta {
-                total,
-                limit: pagination.limit,
-                offset: pagination.offset,
-            },
-            result,
-        }
-    }
-}
-
-pub trait PaginationType {
-    const NAME: &str;
-}
-
-impl<T: PaginationType + JsonSchema> JsonSchema for Pagination<T> {
-    fn schema_name() -> Cow<'static, str> {
-        format!("Paginated{}", T::NAME).into()
-    }
-
-    fn schema_id() -> Cow<'static, str> {
-        Cow::Borrowed(std::any::type_name::<Self>())
-    }
-
-    fn json_schema(generator: &mut schemars::SchemaGenerator) -> schemars::Schema {
-        let result_schema = generator.subschema_for::<Vec<T>>();
-        let pagination_schema = generator.subschema_for::<PaginationMeta>();
-        schemars::Schema::try_from(serde_json::json!({
-           "type": "object",
-           "properties": {
-               "pagination": pagination_schema,
-               "result": result_schema
-           },
-           "required": ["pagination", "result"]
-        }))
-        .unwrap()
-    }
-}
-
-#[cfg(not(feature = "schemas"))]
-pub struct Schemas;
-#[cfg(feature = "schemas")]
-pub struct Schemas {
-    pub request_bodies: fn(
-        &mut schemars::SchemaGenerator,
-        &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>,
-    ),
-    pub response_bodies: fn(
-        &mut schemars::SchemaGenerator,
-        &mut std::collections::HashMap<std::borrow::Cow<'static, str>, schemars::Schema>,
-    ),
-    pub contains: &'static [Self],
-}
-
-#[cfg(feature = "schemas")]
-impl Schemas {
-    pub fn generate(
-        &self,
-        requests: &mut schemars::SchemaGenerator,
-        responses: &mut schemars::SchemaGenerator,
-        request_schemas: &mut std::collections::HashMap<
-            std::borrow::Cow<'static, str>,
-            schemars::Schema,
-        >,
-        response_schemas: &mut std::collections::HashMap<
-            std::borrow::Cow<'static, str>,
-            schemars::Schema,
-        >,
-    ) {
-        for schemas in self.contains {
-            schemas.generate(requests, responses, request_schemas, response_schemas);
-        }
-        (self.request_bodies)(requests, request_schemas);
-        (self.response_bodies)(requests, response_schemas);
+            .map(|query| Self(query.0))
    }
 }
--- a/src/api/socket.rs
+++ b/src/api/socket.rs
@ -18,14 +18,12 @@ use serde::Serialize;
 use tracing::{error, info, instrument};
 use uuid::Uuid;

-use super::{AppState, EState, Error, State, auth::Auth, make_schemas};
+use super::{AppState, EState, Error, State, auth::Auth};

 pub(super) fn router() -> Router<Arc<AppState>> {
    Router::new().route("/", get(handle))
 }

-make_schemas!((); ());
-
 #[instrument(skip(state))]
 pub async fn handle(
    EState(state): State,
--- a/src/api/transactions.rs
+++ b/src/api/transactions.rs
@ -1,21 +1,23 @@
 use std::{borrow::Cow, cell::RefCell, sync::Arc};

 use axum::{Router, routing::post};
+use bank_core::{
+    Name, NameOrUuid, USER_ACCOUNT_PATTERN, make_schemas,
+    pagination::Pagination,
+    transaction::{FullTransaction, Transaction, TransactionQuery},
+};
 use deadpool_postgres::GenericClient;
 use garde::Validate;
 use schemars::JsonSchema;
-use serde::{Deserialize, Serialize};
+use serde::Deserialize;
 use tracing::instrument;
 use uuid::Uuid;

-use crate::model::{
-    Account, Direction, FullTransaction, Name, Transaction, USER_ACCOUNT_PATTERN, User,
-};
+use crate::model::{Accounts, Transactions, Users};

 use super::{
-    AppState, EState, Error, Json, Pagination, PaginationType, Query, RequestPagination, State,
+    AppState, EState, Error, Json, Query, State,
    auth::Auth,
-    make_schemas,
    socket::{SocketEvent, SocketMessage},
 };

@ -23,17 +25,7 @@ pub(super) fn router() -> Router<Arc<AppState>> {
    Router::new().route("/", post(make_payment))
 }

-make_schemas!((MakePayment); (Pagination<FullTransaction>));
-
-impl PaginationType for FullTransaction {
-    const NAME: &str = "Transactions";
-}
-
-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct TransactionHistory {
-    transactions: Vec<Transaction>,
-}
+make_schemas!((MakePayment); ());

 #[derive(Deserialize, Validate)]
 #[serde(untagged, rename = "PaymentTarget")]
@ -122,26 +114,6 @@ pub struct BodyMakePayment {
    pub amount: u64,
 }

-#[derive(Debug, Deserialize, Validate, PartialEq)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-#[serde(untagged)]
-pub enum NameOrUuid {
-    Id(#[garde(skip)] Uuid),
-    Name(#[garde(dive)] Name),
-}
-
-impl NameOrUuid {
-    pub async fn user_id(
-        &self,
-        client: &impl GenericClient,
-    ) -> Result<Option<Uuid>, tokio_postgres::Error> {
-        match self {
-            NameOrUuid::Id(id) => Ok(User::exists(client, *id).await?.then_some(*id)),
-            NameOrUuid::Name(name) => Ok(User::info_by_name(client, &name.0).await?.map(|v| v.id)),
-        }
-    }
-}
-
 #[derive(Debug, Validate, PartialEq)]
 #[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
 pub struct AccountSelector {
@ -159,13 +131,13 @@ impl AccountSelector {
    ) -> Result<Option<(Uuid, Uuid)>, tokio_postgres::Error> {
        let user_id = match &self.user {
            NameOrUuid::Id(uuid) => *uuid,
-            NameOrUuid::Name(name) => match User::info_by_name(client, &*name).await? {
+            NameOrUuid::Name(name) => match Users::info_by_name(client, &*name).await? {
                Some(info) => info.id,
                None => return Ok(None),
            },
        };
        let account_id = match self.account.as_ref() {
-            Some(name) => match Account::get_for_user(client, user_id, &*name).await? {
+            Some(name) => match Accounts::get_for_user(client, user_id, &*name).await? {
                Some(info) => info.id,
                None => return Ok(None),
            },
@ -350,13 +322,6 @@ impl MakePayment {
    }
 }

-#[derive(Debug, Deserialize)]
-pub struct TransactionQuery {
-    #[serde(flatten)]
-    pub pagination: RequestPagination,
-    pub direction: Option<Direction>,
-}
-
 pub async fn transaction_history(
    EState(state): State,
    auth: Auth,
@ -366,7 +331,7 @@ pub async fn transaction_history(
    }): Query<TransactionQuery>,
 ) -> Result<Json<Pagination<FullTransaction>>, Error> {
    let client = state.conn().await?;
-    let result = Transaction::user_history(&client, auth.user_id(), direction, pagination).await?;
+    let result = Transactions::user_history(&client, auth.user_id(), direction, pagination).await?;
    Ok(Json(result))
 }
 pub async fn make_payment(
@ -381,8 +346,8 @@ pub async fn make_payment(
    let mut client = client.transaction().await?;

    let Some(from) = (match from {
-        NameOrUuid::Id(uuid) => Account::by_id(&client, uuid).await?,
-        NameOrUuid::Name(name) => Account::get_for_user(&client, user_id, &*name).await?,
+        NameOrUuid::Id(uuid) => Accounts::by_id(&client, uuid).await?,
+        NameOrUuid::Name(name) => Accounts::get_for_user(&client, user_id, &*name).await?,
    }) else {
        todo!("from account doesn't exist")
    };
@ -401,7 +366,7 @@ pub async fn make_payment(
    client
        .execute(&update_balance_stmt, &[&to, &(amount as i64)])
        .await?;
-    let transaction = Transaction::create(&mut client, from.id, to, amount, None).await?;
+    let transaction = Transactions::create(&mut client, from.id, to, amount, None).await?;
    client.commit().await?;
    state
        .sockets
@ -419,11 +384,10 @@ pub async fn make_payment(

 #[cfg(test)]
 mod tests {
-    use crate::{
-        api::transactions::{
+    use bank_core::Name;
+
+    use crate::api::transactions::{
        AccountSelector, NameOrUuid, UnvalidatedAccountSelector, UnvalidatedTransform,
-        },
-        model::Name,
    };

    use super::MakePayment;
--- a/src/api/user.rs
+++ b/src/api/user.rs
@ -1,19 +1,21 @@
 use std::sync::Arc;

 use axum::{Router, extract::Path, routing::get};
+use bank_core::{
+    pagination::Pagination,
+    transaction::{FullTransaction, TransactionQuery},
+    user::{User, UserAccounts, UserBalance},
+};
 use serde::{Deserialize, Serialize};
 use tracing::instrument;
 use uuid::Uuid;

 use crate::{
    api::ApiError,
-    model::{Account, FullTransaction, Transaction, User, UserAccountInfo},
+    model::{Accounts, Transactions, Users},
 };

-use super::{
-    AppState, EState, Error, Json, Pagination, Query, RequestPagination, State, auth::Auth,
-    make_schemas, transactions::TransactionQuery,
-};
+use super::{AppState, EState, Error, Json, PaginationQuery, Query, State, auth::Auth};

 pub(super) fn router() -> Router<Arc<AppState>> {
    Router::new()
@ -40,20 +42,6 @@ impl UserTarget {
    }
 }

-make_schemas!((); (Pagination<User>, UserAccounts, UserBalance));
-
-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct UserAccounts {
-    pub result: Vec<UserAccountInfo>,
-}
-
-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct UserBalance {
-    pub balance: u64,
-}
-
 pub async fn user_info(
    EState(state): State,
    auth: Auth,
@ -61,7 +49,7 @@ pub async fn user_info(
 ) -> Result<Json<User>, Error> {
    let user = target.user_id(&auth);
    let conn = state.conn().await?;
-    let info = User::info(&conn, user).await?;
+    let info = Users::info(&conn, user).await?;
    if let Some(info) = info {
        return Ok(Json(info));
    }
@ -74,7 +62,7 @@ pub async fn user_info(
 #[instrument(skip(state))]
 pub async fn user_balance(EState(state): State, auth: Auth) -> Result<Json<UserBalance>, Error> {
    let conn = state.conn().await?;
-    let info = Account::list_for_user(&conn, auth.user_id()).await?;
+    let info = Accounts::list_for_user(&conn, auth.user_id()).await?;
    let balance = info.iter().map(|info| info.balance).sum();
    Ok(Json(UserBalance { balance }))
 }
@ -83,10 +71,10 @@ pub async fn user_balance(EState(state): State, auth: Auth) -> Result<Json<UserB
 pub async fn list_users(
    EState(state): State,
    _: Auth,
-    pagination: RequestPagination,
+    PaginationQuery(pagination): PaginationQuery,
 ) -> Result<Json<Pagination<User>>, Error> {
    let conn = state.conn().await?;
-    let users = User::list(&conn, pagination).await?;
+    let users = Users::list(&conn, pagination).await?;
    Ok(Json(users))
 }

@ -100,7 +88,7 @@ pub async fn me_transaction_history(
    }): Query<TransactionQuery>,
 ) -> Result<Json<Pagination<FullTransaction>>, Error> {
    let conn = state.conn().await?;
-    let result = Transaction::user_history(&conn, auth.user_id(), direction, pagination).await?;
+    let result = Transactions::user_history(&conn, auth.user_id(), direction, pagination).await?;
    Ok(Json(result))
 }

@ -108,7 +96,7 @@ pub async fn me_transaction_history(
 pub async fn user_accounts(EState(state): State, auth: Auth) -> Result<Json<UserAccounts>, Error> {
    let user = auth.user_id();
    let conn = state.conn().await?;
-    let result = Account::list_for_user(&conn, user).await?;
+    let result = Accounts::list_for_user(&conn, user).await?;
    Ok(Json(UserAccounts { result }))
 }

--- a/src/model/account.rs
+++ b/src/model/account.rs
@ -1,72 +1,32 @@
+use bank_core::{
+    account::{AccountInfo, UserAccountInfo},
+    pagination::{Pagination, RequestPagination},
+};
 use deadpool_postgres::GenericClient;
-use serde::Serialize;
 use tokio_postgres::Row;
 use tracing::instrument;
 use uuid::{NoContext, Timestamp, Uuid};

-use crate::api::{Pagination, PaginationType, RequestPagination};
-
 use super::count;

-#[derive(Debug, Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct Account {
-    pub id: Uuid,
-    pub user: Uuid,
-    pub name: String,
-    pub balance: u64,
+fn account_info_from_row(row: Row) -> AccountInfo {
+    AccountInfo {
+        id: row.get("id"),
+        user: row.get("user"),
+        name: row.get("name"),
    }
-
-#[derive(Debug, Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct AccountInfo {
-    pub id: Uuid,
-    pub user: Uuid,
-    pub name: String,
-}
-#[derive(Debug, Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct UserAccountInfo {
-    pub id: Uuid,
-    pub name: String,
-    pub balance: u64,
-}
-
-#[derive(Debug, Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct ReducedAccountInfo {
-    pub id: Uuid,
-    pub name: String,
-}
-
-impl PaginationType for UserAccountInfo {
-    const NAME: &str = "UserAccounts";
-}
-impl PaginationType for AccountInfo {
-    const NAME: &str = "Accounts";
-}
-
-impl From<Row> for AccountInfo {
-    fn from(value: Row) -> Self {
-        Self {
-            id: value.get("id"),
-            user: value.get("user"),
-            name: value.get("name"),
 }
+fn user_account_info_from_row(row: Row) -> UserAccountInfo {
+    UserAccountInfo {
+        id: row.get("id"),
+        name: row.get("name"),
+        balance: row.get::<_, i64>("balance") as u64,
    }
 }

-impl From<Row> for UserAccountInfo {
-    fn from(value: Row) -> Self {
-        Self {
-            id: value.get("id"),
-            name: value.get("name"),
-            balance: value.get::<_, i64>("balance") as u64,
-        }
-    }
-}
+pub struct Accounts;

-impl Account {
+impl Accounts {
    #[instrument(skip(client))]
    pub async fn create(
        client: &mut impl GenericClient,
@ -102,7 +62,7 @@ impl Account {
            .query(&stmt, &[&pagination.limit(), &pagination.offset()])
            .await?
            .into_iter()
-            .map(AccountInfo::from)
+            .map(account_info_from_row)
            .collect();
        let total = count(client, &stmt_count, &[]).await?;
        Ok(Pagination::new(users, total, pagination))
@ -120,7 +80,7 @@ impl Account {
            .query(&stmt, &[&user])
            .await?
            .into_iter()
-            .map(UserAccountInfo::from)
+            .map(user_account_info_from_row)
            .collect();
        Ok(users)
    }
@ -133,7 +93,7 @@ impl Account {
            .prepare_cached("select id,name,balance from accounts where id =$1")
            .await?;
        let res = client.query_opt(&stmt, &[&id]).await?;
-        Ok(res.map(UserAccountInfo::from))
+        Ok(res.map(user_account_info_from_row))
    }

    pub async fn owned_by(
@ -161,6 +121,6 @@ impl Account {
            )
            .await?;
        let res = client.query_opt(&stmt, &[&user, &name]).await?;
-        Ok(res.map(UserAccountInfo::from))
+        Ok(res.map(user_account_info_from_row))
    }
 }
--- a/src/model/chats.rs
+++ b/src/model/chats.rs
@ -1,89 +1,42 @@
+use bank_core::{
+    chat::{Chat, ChatInfo, ChatMessage},
+    pagination::{Pagination, RequestPagination},
+};
 use chrono::{DateTime, Utc};
 use deadpool_postgres::GenericClient;
-use serde::Serialize;
 use tokio_postgres::Row;
 use tracing::instrument;
 use uuid::{NoContext, Timestamp, Uuid};

-use crate::api::{Pagination, PaginationType, RequestPagination};
-
 use super::count;

-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct Chat {
-    pub id: Uuid,
-    pub created: DateTime<Utc>,
-}
-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct ChatInfo {
-    pub id: Uuid,
-    pub created: DateTime<Utc>,
-    pub read_until: Option<Uuid>,
-}
-
-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct ChatMessage {
-    pub id: Uuid,
-    pub sender: Uuid,
-    pub time: DateTime<Utc>,
-    pub text: String,
-    pub extra: Option<serde_json::Value>,
-}
-
-impl PaginationType for Chat {
-    const NAME: &str = "Chats";
-}
-impl PaginationType for ChatInfo {
-    const NAME: &str = "ChatInfos";
-}
-
-impl PaginationType for ChatMessage {
-    const NAME: &str = "ChatMessages";
-}
-
-impl From<Row> for Chat {
-    fn from(value: Row) -> Self {
-        Self {
-            id: value.get("id"),
-            created: value.get("created"),
-        }
-    }
-}
-impl From<Row> for ChatInfo {
-    fn from(value: Row) -> Self {
-        Self {
-            id: value.get("id"),
-            created: value.get("created"),
-            read_until: value.get("read_until"),
-        }
-    }
-}
-
-impl From<ChatInfo> for Chat {
-    fn from(value: ChatInfo) -> Self {
+fn chat_from_row(row: Row) -> Chat {
    Chat {
-            id: value.id,
-            created: value.created,
+        id: row.get("id"),
+        created: row.get("created"),
    }
 }
+fn chat_info_from_row(row: Row) -> ChatInfo {
+    ChatInfo {
+        id: row.get("id"),
+        created: row.get("created"),
+        read_until: row.get("read_until"),
+    }
 }

-impl From<Row> for ChatMessage {
-    fn from(value: Row) -> Self {
-        Self {
-            id: value.get("id"),
-            sender: value.get("sender"),
-            time: value.get("timestamp"),
-            text: value.get("text"),
-            extra: value.get("extra"),
-        }
+fn chat_message_from_row(row: Row) -> ChatMessage {
+    ChatMessage {
+        id: row.get("id"),
+        sender: row.get("sender"),
+        time: row.get("timestamp"),
+        text: row.get("text"),
+        extra: row.get("extra"),
    }
 }

-impl Chat {
+pub struct Chats;
+
+impl Chats {
    #[instrument(skip(client))]
    pub async fn exists(
        client: &impl GenericClient,
@ -120,7 +73,7 @@ impl Chat {
            .prepare_cached("select * from chats where id = $1")
            .await?;
        let res = client.query_opt(&stmt, &[&id]).await?;
-        Ok(res.map(Chat::from))
+        Ok(res.map(chat_from_row))
    }

    #[instrument(skip(client))]
@ -131,7 +84,7 @@ impl Chat {
    ) -> Result<Option<ChatInfo>, tokio_postgres::Error> {
        let stmt = client.prepare_cached("select c.id as id, c.created as created, cm.read_until as read_until from chat_members cm join chats c on cm.chat = c.id where c.id = $1 and cm.\"user\" = $2").await?;
        let res = client.query_opt(&stmt, &[&id, &user]).await?;
-        Ok(res.map(ChatInfo::from))
+        Ok(res.map(chat_info_from_row))
    }

    pub async fn member_ids(
@ -181,7 +134,7 @@ impl Chat {
        client.execute(&insert_member, &[&id, &target]).await?;

        client.commit().await?;
-        Ok(Self {
+        Ok(Chat {
            id,
            created: result.get(0),
        })
@ -199,7 +152,7 @@ impl Chat {
            .query(&stmt, &[&user, &pagination.limit(), &pagination.offset()])
            .await?
            .into_iter()
-            .map(Chat::from)
+            .map(chat_from_row)
            .collect();
        let total = count(client, &count_stmt, &[&user]).await?;
        Ok(Pagination::new(result, total, pagination))
@ -220,7 +173,7 @@ impl Chat {
            .query(&stmt, &[&chat, &pagination.limit(), &pagination.offset()])
            .await?
            .into_iter()
-            .map(ChatMessage::from)
+            .map(chat_message_from_row)
            .collect();

        let total = count(client, &count_stmt, &[&chat]).await?;
--- a/src/model/mod.rs
+++ b/src/model/mod.rs
@ -1,9 +1,5 @@
-use std::{ops::Deref, sync::LazyLock};
-
+use bank_core::NameOrUuid;
 use deadpool_postgres::GenericClient;
-use garde::Validate;
-use regex::Regex;
-use serde::{Deserialize, Serialize};
 use tokio_postgres::{ToStatement, types::ToSql};
 use tracing::instrument;
 use uuid::Uuid;
@ -13,44 +9,28 @@ mod chats;
 mod transaction;
 mod user;

-pub use account::{Account, AccountInfo, UserAccountInfo};
-pub use chats::{Chat, ChatInfo, ChatMessage};
-pub use transaction::{Direction, FullTransaction, Transaction};
-pub use user::User;
+pub use account::Accounts;
+pub use chats::Chats;
+pub use transaction::Transactions;
+pub use user::Users;

-use crate::api::make_schemas;
-
-static NAME_PATTERN_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(NAME_PATTERN).unwrap());
-
-pub const NAME_PATTERN: &str = "^[a-z0-9_-]+$";
-pub const USER_ACCOUNT_PATTERN: &str = "([a-z0-9_-]+):([a-z0-9_-]+)";
-
-#[derive(Debug, Clone, PartialEq, Eq, Validate, Serialize, Deserialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-#[garde(transparent)]
-pub struct Name(#[garde(length(min = 3, max = 32), pattern(NAME_PATTERN_RE))] pub String);
-
-impl Deref for Name {
-    type Target = str;
-
-    fn deref(&self) -> &Self::Target {
-        self.0.as_str()
-    }
-}
-impl Name {
-    pub fn into_inner(self) -> String {
-        self.0
+pub(crate) trait NameOrUuidExt {
+    async fn user_id(
+        &self,
+        client: &impl GenericClient,
+    ) -> Result<Option<Uuid>, tokio_postgres::Error>;
 }

-    pub fn validate_name(name: &str) -> Result<(), garde::Error> {
-        garde::rules::pattern::apply(&name, (&NAME_PATTERN_RE,))
+impl NameOrUuidExt for NameOrUuid {
+    async fn user_id(
+        &self,
+        client: &impl GenericClient,
+    ) -> Result<Option<Uuid>, tokio_postgres::Error> {
+        match self {
+            NameOrUuid::Id(id) => Ok(Users::exists(client, *id).await?.then_some(*id)),
+            NameOrUuid::Name(name) => Ok(Users::info_by_name(client, &name.0).await?.map(|v| v.id)),
        }
    }
-
-#[derive(Debug)]
-pub struct IdWithName {
-    pub id: Uuid,
-    pub name: Name,
 }

 #[instrument(skip(client))]
@ -61,5 +41,3 @@ async fn count<T: ?Sized + ToStatement + Sync + Send + std::fmt::Debug>(
 ) -> Result<u64, tokio_postgres::Error> {
    Ok(client.query_one(statement, params).await?.get::<_, i64>(0) as u64)
 }
-
-make_schemas!((Direction); (User, Account, AccountInfo, UserAccountInfo, Transaction, FullTransaction, Chat, ChatInfo, ChatMessage));
--- a/src/model/transaction.rs
+++ b/src/model/transaction.rs
@ -1,94 +1,46 @@
-use chrono::{DateTime, Utc};
+use bank_core::{
+    account::ReducedAccountInfo,
+    pagination::{Pagination, RequestPagination},
+    transaction::{Direction, FullTransaction, Participant, Transaction},
+    user::User,
+};
 use deadpool_postgres::GenericClient;
-use serde::{Deserialize, Serialize};
 use tokio_postgres::Row;
 use uuid::{NoContext, Timestamp, Uuid};

-use crate::{
-    api::{Pagination, RequestPagination},
-    model::count,
-};
+use crate::model::count;

-use super::{User, account::ReducedAccountInfo};
-
-#[derive(Debug, Deserialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-#[serde(rename_all = "lowercase")]
-pub enum Direction {
-    Received,
-    Sent,
-}
-
-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct Participant {
-    user: User,
-    account: ReducedAccountInfo,
-}
-
-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct FullTransaction {
-    from: Participant,
-    to: Participant,
-    amount: u64,
-    timestamp: DateTime<Utc>,
-    message: Option<String>,
-}
-
-impl From<Row> for FullTransaction {
-    fn from(value: Row) -> Self {
-        Self {
+fn full_transaction_from_row(row: Row) -> FullTransaction {
+    FullTransaction {
        from: Participant {
            user: User {
-                    id: value.get("from_user_id"),
-                    name: value.get("from_user_name"),
+                id: row.get("from_user_id"),
+                name: row.get("from_user_name"),
            },
            account: ReducedAccountInfo {
-                    id: value.get("from_account_id"),
-                    name: value.get("from_account_name"),
+                id: row.get("from_account_id"),
+                name: row.get("from_account_name"),
            },
        },
        to: Participant {
            user: User {
-                    id: value.get("to_user_id"),
-                    name: value.get("to_user_name"),
+                id: row.get("to_user_id"),
+                name: row.get("to_user_name"),
            },
            account: ReducedAccountInfo {
-                    id: value.get("to_account_id"),
-                    name: value.get("to_account_name"),
+                id: row.get("to_account_id"),
+                name: row.get("to_account_name"),
            },
        },
-            timestamp: value.get("timestamp"),
-            amount: value.get::<_, i64>("amount") as u64,
-            message: value.get("message"),
-        }
+        timestamp: row.get("timestamp"),
+        amount: row.get::<_, i64>("amount") as u64,
+        message: row.get("message"),
    }
 }

-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct Transaction {
-    pub from: Uuid,
-    pub to: Uuid,
-    pub amount: u64,
-    pub timestamp: DateTime<Utc>,
-    pub message: Option<String>,
-}
+pub struct Transactions;

-impl From<Row> for Transaction {
-    fn from(value: Row) -> Self {
-        Self {
-            from: value.get("from"),
-            to: value.get("to"),
-            amount: value.get::<_, i64>("amount") as u64,
-            timestamp: value.get("timestamp"),
-            message: value.get("message"),
-        }
-    }
-}
-
-impl Transaction {
+impl Transactions {
    pub async fn create(
        client: &mut impl GenericClient,
        from: Uuid,
@ -104,7 +56,7 @@ impl Transaction {
            .query_one(&stmt, &[&id, &from, &to, &(amount as i64), &message])
            .await?;
        let timestamp = row.get(0);
-        Ok(Self {
+        Ok(Transaction {
            from,
            to,
            amount,
@ -113,75 +65,6 @@ impl Transaction {
        })
    }

-    pub async fn get_to_account(
-        client: &mut impl GenericClient,
-        id: Uuid,
-    ) -> Result<Vec<Transaction>, tokio_postgres::Error> {
-        let stmt = client
-            .prepare_cached("select * from transactions where \"to\" = $1")
-            .await?;
-        let transactions = client
-            .query(&stmt, &[&id])
-            .await?
-            .into_iter()
-            .map(Transaction::from)
-            .collect();
-        Ok(transactions)
-    }
-
-    pub async fn get_from_account(
-        client: &mut impl GenericClient,
-        id: Uuid,
-    ) -> Result<Vec<Transaction>, tokio_postgres::Error> {
-        let stmt = client
-            .prepare_cached("select * from transactions where \"from\" = $1")
-            .await?;
-        let transactions = client
-            .query(&stmt, &[&id])
-            .await?
-            .into_iter()
-            .map(Transaction::from)
-            .collect();
-        Ok(transactions)
-    }
-
-    pub async fn get_all_for_account(
-        client: &mut impl GenericClient,
-        id: Uuid,
-    ) -> Result<Vec<Transaction>, tokio_postgres::Error> {
-        let stmt = client
-            .prepare_cached("select * from transactions where \"from\" = $1 or \"to\" = $1")
-            .await?;
-        let transactions = client
-            .query(&stmt, &[&id])
-            .await?
-            .into_iter()
-            .map(Transaction::from)
-            .collect();
-        Ok(transactions)
-    }
-
-    pub async fn get_all_to_user(
-        _client: &mut impl GenericClient,
-        _id: Uuid,
-    ) -> Result<Vec<Transaction>, tokio_postgres::Error> {
-        todo!()
-    }
-
-    pub async fn get_all_from_user(
-        _client: &mut impl GenericClient,
-        _id: Uuid,
-    ) -> Result<Vec<Transaction>, tokio_postgres::Error> {
-        todo!()
-    }
-
-    pub async fn get_all_for_user(
-        _client: &mut impl GenericClient,
-        _id: Uuid,
-    ) -> Result<Vec<Transaction>, tokio_postgres::Error> {
-        todo!()
-    }
-
    pub async fn account_history(
        client: &impl GenericClient,
        id: Uuid,
@ -242,7 +125,7 @@ impl Transaction {
            .await?;
        let transactions = transactions
            .into_iter()
-            .map(FullTransaction::from)
+            .map(full_transaction_from_row)
            .collect();
        let total = count(client, &count_stmt, &[&id]).await?;

--- a/src/model/user.rs
+++ b/src/model/user.rs
@ -1,33 +1,25 @@
-use axum::http::StatusCode;
+use bank_core::{
+    ApiError,
+    pagination::{Pagination, RequestPagination},
+    user::User,
+};
 use deadpool_postgres::GenericClient;
-use serde::Serialize;
 use tokio_postgres::{Row, error::SqlState};
 use tracing::instrument;
 use uuid::{NoContext, Timestamp, Uuid};

-use crate::api::{ApiError, Error, Pagination, PaginationType, RequestPagination};
+use crate::api::Error;

-use super::{Account, count};
+use super::{Accounts, count};

-#[derive(Serialize)]
-#[cfg_attr(feature = "schemas", derive(schemars::JsonSchema))]
-pub struct User {
-    pub id: Uuid,
-    pub name: String,
-}
+pub struct Users;

-impl From<Row> for User {
-    fn from(value: Row) -> Self {
-        Self {
-            id: value.get("id"),
-            name: value.get("name"),
+pub fn user_from_row(row: Row) -> User {
+    User {
+        id: row.get("id"),
+        name: row.get("name"),
    }
 }
-}
-
-fn conflict_error() -> ApiError<'static> {
-    ApiError::new(StatusCode::CONFLICT, "conflict", "Conflict")
-}

 fn unique_violation(error: tokio_postgres::Error, api_error: fn() -> ApiError<'static>) -> Error {
    let Some(code) = error.code() else {
@ -39,11 +31,7 @@ fn unique_violation(error: tokio_postgres::Error, api_error: fn() -> ApiError<'s
    return error.into();
 }

-impl PaginationType for User {
-    const NAME: &str = "UserList";
-}
-
-impl User {
+impl Users {
    pub async fn exists(
        client: &impl GenericClient,
        id: Uuid,
@ -68,10 +56,10 @@ impl User {
        let id = Uuid::new_v7(Timestamp::now(NoContext));
        tx.execute(&stmt, &[&id, &name, &hash])
            .await
-            .map_err(|err| unique_violation(err, conflict_error))?;
-        Account::create(&mut tx, Some(id), id, "personal")
+            .map_err(|err| unique_violation(err, || ApiError::CONFLICT))?;
+        Accounts::create(&mut tx, Some(id), id, "personal")
            .await
-            .map_err(|err| unique_violation(err, conflict_error))?;
+            .map_err(|err| unique_violation(err, || ApiError::CONFLICT))?;
        tx.commit().await?;
        Ok(id)
    }
@ -87,7 +75,7 @@ impl User {
        let res = client.query_opt(&stmt, &[&name]).await?;
        Ok(res.map(|res| {
            let password = res.get("password");
-            (password, res.into())
+            (password, user_from_row(res))
        }))
    }
    #[instrument(skip(client))]
@ -99,7 +87,7 @@ impl User {
            .prepare_cached("select id,name from users where name = $1")
            .await?;
        let res = client.query_opt(&stmt, &[&name]).await?;
-        Ok(res.map(User::from))
+        Ok(res.map(user_from_row))
    }

    #[instrument(skip(client))]
@ -115,7 +103,7 @@ impl User {
            .query(&stmt, &[&pagination.limit(), &pagination.offset()])
            .await?
            .into_iter()
-            .map(User::from)
+            .map(user_from_row)
            .collect();
        let count = count(client, &stmt_count, &[]).await?;
        Ok(Pagination::new(users, count, pagination))
@ -129,7 +117,7 @@ impl User {
        let stmt = client
            .prepare_cached("select id,name from users where id = $1")
            .await?;
-        let info = client.query_opt(&stmt, &[&id]).await?.map(User::from);
+        let info = client.query_opt(&stmt, &[&id]).await?.map(user_from_row);
        Ok(info)
    }
 }