# Configuring the YAML file

This is an example for the YAML file :

```yaml
 databaseConfig:
      user : "---"
      host : "---"
      database: "---"
      password  : "---"
      port: 0
      
 gasTanks:
   - name: "gasTank1"
     apiKey: "---"
     chainId: 0
     providerURL: "---"
     whiteList:  
        - "address1"
        - "address2"
        - "address3"
```

### databaseConfig

Here you add your database information as known including user, host, database, password, and port.

{% hint style="info" %}
Note that for a host.docker.internal in case of local database.
{% endhint %}

## GasTanks

This is an array of gas tanks, where each gasTank should include the following:

**name**: The name of your gas tank

**apiKey** : Biconomy apiKey for this gasTank

**chainId**: The chain id for this gas tank

**providerURL** : Link to your private provider

**whiteList** : an array of contracts addresses this gas tank is allowed to interact with.