7c14c80444
* Fix SimpleFIN inverting Loan account balances
SimplefinAccount::Processor#process_account! routes every liability
through OverpaymentAnalyzer + normalize_liability_balance. That path
is built around credit-like liabilities, where transaction history
distinguishes debt vs. credit. For a Loan account with only the
opening anchor (no payment history), the analyzer returns :unknown
and the fallback negates the observed value:
def normalize_liability_balance(observed, bal, avail)
...
-observed
end
That's wrong for loans: the bank reports the principal outstanding
as a positive number from its own books. Negating it stores the loan
balance as negative, so BalanceSheet#net_worth = assets - liabilities
ends up _adding_ the loan instead of subtracting it (off by 2× the
loan amount). Example with a hypothetical mortgage:
raw_balance = 100000.00 (positive — bank's own report)
Sure stored = -100000.00 (negated by the fallback)
Net worth shown = inflated by 2 × 100000
Short-circuit Loan accountables straight to observed.abs and skip the
analyzer/fallback entirely. Loans don't have credit-vs-debt
ambiguity — if the loan is paid off the balance is 0, not negative.
Credit cards still go through the existing heuristic.
* Add observability for the SimpleFIN loan sign branch
Mirrors the logging + Sentry breadcrumb the credit-card branches emit
when the OverpaymentAnalyzer classifies as :credit / :debt, so the
loan short-circuit shows up in production traces too. Per CodeRabbit
review on #1574.
* Test that positive bank-reported loan balances are preserved
The existing "inverts negative balance for loan liabilities" test only
covers a bank that reports the loan as negative — both the old (buggy)
fallback and the new short-circuit produce the same +50000 there, which
is why the inversion bug went undetected. Add a sibling test where the
bank reports +50000 (the common mortgage convention); under the old
code that became -50000 and inflated net worth.
* Redact monetary amounts from SimpleFIN liability info logs
Move raw observed/stored amounts and metric totals from `Rails.logger.info`
and `Sentry.add_breadcrumb` payloads to a `Rails.logger.debug` line.
The info-level message and breadcrumb data now carry only identifiers
(`sfa_id`) plus the classification (`loan` / `credit` / `debt` /
`unknown`) and `tx_count`, so log aggregators and Sentry no longer
receive raw monetary values for any of the four liability branches.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Sure: The personal finance app for everyone
Get involved: Discord • Website • Issues
Important
This repository is a community fork of the now-abandoned Maybe Finance project.
Learn more in their final release doc.
Backstory
The Maybe Finance team spent most of 2021–2022 building a full-featured personal finance and wealth management app. It even included an “Ask an Advisor” feature that connected users with a real CFP/CFA — all included with your subscription.
The business end of things didn't work out, and so they stopped developing the app in mid-2023.
After spending nearly $1 million on development (employees, contractors, data providers, infra, etc.), the team open-sourced the app. Their goal was to let users self-host it for free — and eventually launch a hosted version for a small fee.
They actually did launch that hosted version … briefly.
That also didn’t work out — at least not as a sustainable B2C business — so now here we are: hosting a community-maintained fork to keep the codebase alive and see where this can go next.
Join us!
Hosting Sure
Sure is a fully working personal finance app that can be self hosted with Docker.
Forking and Attribution
This repo is a community fork of the archived Maybe Finance repo. You’re free to fork it under the AGPLv3 license — but we’d love it if you stuck around and contributed here instead.
To stay compliant and avoid trademark issues:
- Be sure to include the original AGPLv3 license and clearly state in your README that your fork is based on Maybe Finance but is not affiliated with or endorsed by Maybe Finance Inc.
- "Maybe" is a trademark of Maybe Finance Inc. and therefore, use of it is NOT allowed in forked repositories (or the logo)
Performance Issues
With data-heavy apps, inevitably, there are performance issues. We've set up a public dashboard showing the problematic requests seen on the demo site, along with the stacktraces to help debug them.
https://www.skylight.io/app/applications/s6PEZSKwcklL/recent/6h/endpoints
Any contributions that help improve performance are very much welcome.
Local Development Setup
If you are trying to self-host the app, read this guide to get started.
The instructions below are for developers to get started with contributing to the app.
Requirements
- See
.ruby-versionfile for required Ruby version - PostgreSQL >9.3 (latest stable version recommended)
- Redis > 5.4 (latest stable version recommended)
Getting Started
cd sure
cp .env.local.example .env.local
bin/setup
bin/dev
# Optionally, load demo data
rake demo_data:default
Visit http://localhost:3000 to view the app.
If you loaded the optional demo data, log in with these credentials:
- Email:
user@example.com - Password:
Password1!
For further instructions, see guides below.
Setup Guides
- Mac dev setup
- Linux dev setup
- Windows dev setup
- Dev containers - visit this guide
One-click
License and Trademarks
Maybe and Sure are both distributed under an AGPLv3 license.
- "Maybe" is a trademark of Maybe Finance, Inc.
- "Sure" is not, and refers to this community fork.
