I should be working.

migrations/create_tables_001.sql

@@ -53,13 +53,11 @@ CREATE TABLE IF NOT EXISTS accounts
     security      INTEGER  NOT NULL,
     account_type  TEXT     NOT NULL,
 
-    owner         INTEGER  NOT NULL, -- todo: remove
     amount        INTEGER  NOT NULL,
     timestamp     DATETIME NOT NULL,
     creation_time DATETIME DEFAULT CURRENT_TIMESTAMP,
 
     FOREIGN KEY (security) REFERENCES securities (id),
-    FOREIGN KEY (owner) REFERENCES users (id),
     FOREIGN KEY (account_type) REFERENCES account_types (name)
 );
 
@@ -70,7 +68,7 @@ CREATE TABLE IF NOT EXISTS account_user_permissions
     user_id       INTEGER NOT NULL,
     creation_time DATETIME DEFAULT CURRENT_TIMESTAMP,
 
-    FOREIGN KEY (account_id) REFERENCES account (id),
+    FOREIGN KEY (account_id) REFERENCES accounts (id),
     FOREIGN KEY (user_id) REFERENCES users (id)
 
 );

src/db/_accounts.rs

@@ -88,14 +88,18 @@ pub fn get_account_by_id(tx: &Transaction, id: &AccountId) -> Result<Account> {
 }
 
 fn create_account(tx: &Transaction, sec: &SecurityId, user: &UserId, account_type: AccountType) -> Result<Account> {
-    let q = "INSERT INTO accounts(security, owner, amount, timestamp, account_type)
+    let q = "INSERT INTO accounts(security, amount, timestamp, account_type)
-                   VALUES (?1, ?2, 0, CURRENT_TIMESTAMP, ?3)";
+                   VALUES (?1, 0, CURRENT_TIMESTAMP, ?2)";
     let account_type = match account_type {
         AccountType::Checking => "checking",
         AccountType::SecurityEmitter => "security_emitter",
     };
-    tx.execute(q, (sec, user, account_type))?;
+    tx.execute(q, (sec, account_type))?;
     let id = AccountId::from_id(tx.last_insert_rowid() as u32);
+
+    let q = "INSERT INTO account_user_permissions(user_id, account_id)
+                  VALUES(?1, ?2)";
+    tx.execute(q, params![user, id])?;
     return get_account_by_id(tx, &id);
 }
 
@@ -108,7 +112,7 @@ pub fn create_security_emitter_account(tx: &Transaction, sec: &SecurityId, user:
 }
 
 pub fn is_owner(tx: &Transaction, account_id: &AccountId, user_id: &UserId) -> Result<bool> {
-    let q = "SELECT id FROM accounts WHERE id = ?1 AND owner = ?2";
+    let q = "SELECT id FROM account_user_permissions WHERE account_id = ?1 AND user_id = ?2";
     let params = params![account_id, user_id];
     let ite = |row: &Row| row.get::<usize, u32>(0);
     let option = tx.query_row(q, params, ite).optional()?;

src/db/_cheques.rs

@@ -2,9 +2,13 @@ use rusqlite::{Result, Transaction};
 
 use crate::db::_external_id::{AccountId, SecurityId, UserId};
 
+pub type Drawer = (UserId, AccountId, SecurityId);
+pub type Payee = (UserId, SecurityId);
+
 #[derive(Debug)]
 pub struct SecurityEmitterCheque {
     pub drawer_user_id: UserId,
+    pub drawer_account_id: AccountId,
     pub security_id: SecurityId,
     pub payee_user_id: UserId,
     pub cheque_number: u32,
@@ -12,15 +16,15 @@ pub struct SecurityEmitterCheque {
 }
 
 impl SecurityEmitterCheque {
-    pub fn new(drawer_user_id: UserId,
+    pub fn new(drawer: Drawer,
-               security_id: SecurityId,
+               payee: Payee,
-               payee_user_id: UserId,
                amount: u32,
                cheque_number: u32) -> SecurityEmitterCheque {
         SecurityEmitterCheque {
-            drawer_user_id,
+            drawer_user_id: drawer.0,
-            security_id,
+            drawer_account_id: drawer.1,
-            payee_user_id,
+            security_id: drawer.2,
+            payee_user_id: payee.0,
             cheque_number,
             amount,
         }

src/db/mod.rs

@@ -18,11 +18,15 @@ pub mod users {
 }
 
 pub mod accounts {
-    pub use super::_accounts::{Account, create_checking_account, get_account_by_id, list_accounts};
+    pub use super::_accounts::{Account,
+                               create_checking_account,
+                               create_security_emitter_account,
+                               get_account_by_id,
+                               list_accounts};
 }
 
 pub mod cheques {
-    pub use super::_cheques::SecurityEmitterCheque;
+    pub use super::_cheques::{SecurityEmitterCheque, Drawer, Payee};
 }
 
 pub mod test_utils {

src/services/_transactions.rs

@@ -1,4 +1,4 @@
-use rusqlite::{ffi, params, Params, Transaction};
+use rusqlite::{ffi, params, Params, Savepoint, Transaction};
 
 use crate::db::accounts::{Account, get_account_by_id};
 use crate::db::cheques::SecurityEmitterCheque;
@@ -44,18 +44,20 @@ fn _add_cheque_to_cashed_cheques_log(tx: &TransactionHelper,
 fn cash_cheque(tx: &Transaction,
                cheque: &SecurityEmitterCheque,
                account_id: &AccountId) -> CustomResult<()> {
-
+    // let mut savepoint: Savepoint = tx.savepoint_with_name("bib").map_err(Error::SqlError)?;
-    if !securities::is_owner(tx, &cheque.security_id, &cheque.drawer_user_id).map_err(Error::SqlError)? {
+    if !securities::is_owner(&tx, &cheque.security_id, &cheque.drawer_user_id).map_err(Error::SqlError)? {
         return Err(Error::InvalidDrawer(format!("The drawer is the security owner: {:?}", cheque)));
     }
 
     // todo:
     //   1. payee is owner of the account.
+    //   2. drawer is owner of the account.
 
 
     let myx = TransactionHelper::new(tx);
     _add_securities_to_account(&myx, cheque, account_id)?;
     _add_cheque_to_cashed_cheques_log(&myx, cheque, account_id)?;
+    // savepoint.rollback().map_err(Error::SqlError)?;
     // create transaction log
     Ok(())
 }
@@ -64,9 +66,10 @@ fn cash_cheque(tx: &Transaction,
 #[cfg(test)]
 mod test_caching_cheques {
     use rusqlite::{Connection, params};
-    use crate::db::accounts::create_checking_account;
+    use crate::db::accounts::{create_checking_account, create_security_emitter_account};
 
     use crate::db::{accounts, test_utils};
+    use crate::db::cheques::{Drawer, Payee};
     use crate::db::external_id::{Id, SecurityId, UserId};
     use crate::db::users::User;
     use crate::migration;
@@ -79,34 +82,32 @@ mod test_caching_cheques {
         return conn;
     }
 
-    fn setup_basic() -> (Connection, UserId, SecurityId, UserId, AccountId) {
+    fn setup_basic() -> (Connection, Drawer, Payee, AccountId) {
         let mut conn = setup_conn();
         let tx = conn.transaction().unwrap();
         let (users, securities, accounts) = test_utils::setup_basic_environment(&tx).unwrap();
         let sec = securities.get(0).unwrap();
         let drawer = users.get(0).unwrap();
         let payee = users.get(1).unwrap();
+        let drawer_account = create_security_emitter_account(&tx, &sec.id(), &drawer.id()).unwrap();
         let payee_account = create_checking_account(&tx, &sec.id(), &payee.id()).unwrap();
 
         tx.commit().unwrap();
-        (conn, drawer.id(), sec.id(), payee.id(), payee_account.id())
+        let drawer: Drawer = (drawer.id(), drawer_account.id(), sec.id());
+        let payee: Payee = (payee.id(), sec.id());
+        (conn, drawer, payee, payee_account.id())
     }
 
 
     #[test]
     fn test_basic_happy_path() -> CustomResult<()> {
-        let (mut conn, drawer, sec, payee, payee_account) = setup_basic();
+        let (mut conn, drawer, payee, payee_account) = setup_basic();
-        let tx = conn.transaction().unwrap();
+        let mut tx = conn.transaction().unwrap();
 
         let cheque = SecurityEmitterCheque::new(
-            drawer,
+            drawer, payee, 1000, 99);
-            sec,
-            payee,
-            1000,
-            99,
-        );
 
-        cash_cheque(&tx, &cheque, &payee_account)?;
+        cash_cheque(&mut tx, &cheque, &payee_account)?;
         tx.commit().unwrap();
 
         let tx = conn.transaction().unwrap();
@@ -118,23 +119,22 @@ mod test_caching_cheques {
 
     #[test]
     fn test_double_spend() -> CustomResult<()> {
-        let (mut conn, drawer, sec, payee, payee_account) = setup_basic();
+        let (mut conn, drawer, payee, payee_account) = setup_basic();
         let amount: u32 = 1000;
-        let tx = conn.transaction().unwrap();
+        let mut tx = conn.transaction().unwrap();
 
         let cheque = SecurityEmitterCheque::new(
             drawer,
-            sec,
             payee,
             1000,
             99,
         );
 
-        cash_cheque(&tx, &cheque, &payee_account)?;
+        cash_cheque(&mut tx, &cheque, &payee_account)?;
         tx.commit().unwrap();
-        let tx = conn.transaction().unwrap();
+        let mut tx = conn.transaction().unwrap();
 
-        let ret = cash_cheque(&tx, &cheque, &payee_account);
+        let ret = cash_cheque(&mut tx, &cheque, &payee_account);
         match ret {
             Err(Error::DoubleSpendingError(_)) => Ok(()),
             _ => Err(Error::Testing("Expected double spending error here.".to_string()))
@@ -143,19 +143,19 @@ mod test_caching_cheques {
 
     #[test]
     fn test_invalid_drawer() -> CustomResult<()> {
-        let (mut conn, drawer, sec, payee, payee_account) = setup_basic();
+        let (mut conn, drawer, payee, payee_account) = setup_basic();
         let amount: u32 = 1000;
-        let tx = conn.transaction().unwrap();
+        let mut tx = conn.transaction().unwrap();
-        let not_currency_owner = UserId::from_id(drawer.get_id() + 72623);
+        let not_currency_owner_user_id = UserId::from_id(drawer.0.get_id() + 72623);
+        let not_currency_owner: Drawer = (not_currency_owner_user_id, drawer.1, drawer.2);
         let cheque = SecurityEmitterCheque::new(
             not_currency_owner,
-            sec,
             payee,
             1000,
             99,
         );
 
-        let ret = cash_cheque(&tx, &cheque, &payee_account);
+        let ret = cash_cheque(&mut tx, &cheque, &payee_account);
         match ret {
             Err(Error::InvalidDrawer(_)) => Ok(()),
             _ => Err(Error::Testing("Expected invalid drawer here.".to_string()))