Mathematica Code Knowledge

Core Scripts

ledger.m

Main processing script
Parses ledger files
Calculates current balances with interest
Generates balance and transaction files

nightly.m

Runs nightly via cron
Updates all user transaction histories
Processes list of ledgers from ledgers.txt
Takes about 5 minutes per ledger

Interest Calculation

Interest rates defined in ledger files
Format: irate[YYYY.MM.DD] = rate
Rates compound continuously
New rates take effect from specified date
Historical rates preserved for accurate calculations

Date Handling

Special date values:

LAST - Process through last transaction
TODAY - Process through noon today
Dates formatted as YYYY.MM.DD

Error Handling

Invalid transactions are skipped
Parse errors reported in balance output
Missing files create default empty states