Commission fees task

To run demo

cp .env.example .env
npm i
node app.js input.json

To run tests

npm run test

To run tests with coverage

npm run coverage

Some places that need to be improved or changed as the project expands:

• Change CashCommission model. We need to move asynchronous data getters to another location, and standardize the model. Suggested structure for this model:

{
    cash_operation_type: string,
    user_type: string,
    rules: [
        {
            rule: string, //min, max, week_limit
            amount: number,
            currency: string
        }
    ]    
}

• Move User.transactionsHistory to a separate model