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DateTimeNr Library README

Overview

DateTimeNr is a specialized library tailored for Noir. Essential in blockchain and cryptographic applications, it offers precise and efficient handling of date and time data.

Features

  • Structures for Date and Time: Well-defined structures for dates, times, and combined datetime.
  • Leap Year Detection: Accurately identifies leap years, a key aspect for date computations.
  • Parsing Functions: Converts raw year, month, day, hour, minute, and second data into structured formats.
  • Formatting Tools: Transforms date and time objects into user-friendly formats.
  • Time Zone Adjustment: Alters time data for different global time zones.
  • Arithmetic Operations: Adds or subtracts years, months, days, hours, minutes, and seconds.

ZKP Context

In ZKPs and blockchain:

  • Trustless Verification: Generates proofs related to time without revealing specifics.
  • Smart Contract Logic: Powers time-dependent contract functionalities.
  • Computational Efficiency: Tailored for ZKP computational limits, suitable for on-chain use.

Usage Examples

Date and Time Parsing

let date = parse_date(2024, 12, 31);
let time = parse_time(23, 59, 59, 0);

Formatting

let formatted_date = format_date(date);
let formatted_time = format_time(time);

Time Zone Conversion

let time_utc = parse_time(15, 0, 0, 0);
let time_est = convert_time_zone(time_utc, -5);

Arithmetic Operations

let date = parse_date(2021, 1, 1);
let new_date = add_to_date(date, 1, 0, 0);
let time = parse_time(11, 30, 0, 0);
let new_time = add_time(time, 1, 30, 0);

Leap Year

let leap_2020 = is_leap_year(2020);
let leap_2019 = is_leap_year(2019);

Month Handling

let feb_2020_days = days_in_month(2020, 2);
let feb_2019_days = days_in_month(2019, 2);

Date Components Adjustment

let date = parse_date(2021, 12, 15);
let new_date = adjust_month(date, 2);
let another_date = adjust_day(date, -10);

Subtracting Dates/Times

let new_date = subtract_from_date(date, 1, 0, 0);
let new_time = subtract_time(time, 2, 0, 0);

Date Difference

let start_date = parse_date(2021, 1, 1);
let end_date = parse_date(2021, 12, 31);
let difference = date_difference(start_date, end_date);

Limitations

  • Date Range: Limited to u32 range.
  • Time Zone Simplification: Excludes daylight saving adjustments.
  • Leap Second Exclusion: Does not account for leap seconds.

Testing

Features robust tests for accuracy and reliability.

Contributing

Contributions are welcome! Feel free to submit pull requests or issues.

License

Distributed under Apache License 2.0. See LICENSE for details.