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In finance, it's common for accounts to have so-called "velocity limits". In this task, you'll write a program that accepts or declines attempts to load funds into customers' accounts in real-time.

Each attempt to load funds will come as a single-line JSON payload, structured as follows:

{ "id": "1234", "customer_id": "1234", "load_amount": "$123.45", "time": "2018-01-01T00:00:00Z" }

Each customer is subject to three limits:

• A maximum of $5,000 can be loaded per day
• A maximum of $20,000 can be loaded per week
• A maximum of 3 loads can be performed per day, regardless of amount

As such, a user attempting to load $3,000 twice in one day would be declined on the second attempt, as would a user attempting to load $400 four times in a day.

For each load attempt, you should return a JSON response indicating whether the fund load was accepted based on the user's activity, with the structure:

{ "id": "1234", "customer_id": "1234", "accepted": true }

You can assume that the input arrives in ascending chronological order and that if a load ID is observed more than once for a particular user, all but the first instance can be ignored. Each day is considered to end at midnight UTC, and weeks start on Monday (i.e. one second after 23:59:59 on Sunday).

Your program should process lines from input.txt and return output in the format specified above, either to standard output or a file. Expected output given our input data can be found in output.txt.

You're welcome to write your program in a general-purpose language of your choosing, but as we use Go we do have a preference towards solutions written in it.

We value well-structured, self-documenting code with sensible test coverage. Descriptive function and variable names are appreciated, as is isolating your business logic from the rest of your code.