# DB schema

```mermaid
erDiagram
    users ||--o{ accounts : owner
    users ||--o{ securities : owner
    security_types ||--o{ securities: s
    securities ||--o{ accounts: ps
    securities ||--o{ security_permissions: i
    users ||--o{ security_permissions: i
    users ||--o{ cheques: ps
    securities ||--o{ cheques: ps
```