# Blockchain Collection fee
[please read first](daemon.md)

### files:
- {$Dena_path}/app/workers/daemons/deposit.rb
- {$Dena_path}/app/services/wallet_service.rb

### implementation
during blockchain deposit daemon, WalletService asks its Adapter (by passing The relevant deposit wallet) that the `prepare_deposit_collection!` method was implemented or not.<br />
if not, the daemon kept continues its process, but if that method existed in the coin Adapter, the deposit daemon call the `collect_fee` method on the deposit DB record.<br />

#### collect_fee function
1. Check the spread column of the deposit to find was filled or not. if not call `spread_between_wallets!` from the Deposit model.
2. Active relevant fee wallet will be found from DB. if not found, we will back to the deposit daemon process.
3. Create WalletService object by passing active fee wallet and run `deposit_collection_fees!` method on the deposit record.
4. `deposit_collection_fees` method, run `prepare_deposit_collection`
5. `prepare_deposit_collection` method will have a unique implementation for each coin (blockchain),but eventually, the output must be a transaction that in addition to sending into the relevant blockchain, also will be saved in the local DB.
6. Change the state column of the deposit record from `processing` to `fee_processing`

```mermaid
graph TD
    A((Depoist Daemon)) -->|deposit record| B[WalletService ]
    B --> |the Depoist Wallet Record| C{Adapter}
    C --> |`prepare_deposit_collection` is not impelemented |A
    C --> |`prepare_deposit_collection` is impelemented| E(WalletService)
    E --> |the Fee Wallet Record| C
    C --> D(`deposit_collection_fees!`)
    D --> |change state to fee_processing|A
```