# Order Creation: Api

### Outcome:
Users create sell or buy order.

### Implementation description:

#### Endpoints:
- POST {$domain}/api/v2/peatio/marker/orders/fiat
#### Params
 - market
 - side
 - volume
 - ord_type

#### File destination:
{$Dena_Path}/app/api/v2/market/orders.rb


```mermaid
sequenceDiagram

    title Order Creation
    User->>Ranj: market, side, volume, ord_type
    Ranj->>Dena: POST: after client side checking
    Dena->>Ranj: 4xx if lose any required parameters
    Dena->>Ranj: 4xx if users level lower than the 
    Dena->>Dena: compute lock balance
    Dena->>Dena: send order to the Order Processor queue
    Dena->>Ranj: 2xx order record created 

    Ranj->>User: show The Order response

```