feat(validations): add validations yaml and set up repo docs #2

billhimmelsbach · 2024-03-22T03:33:21Z

Sets up the regtech-regex repository with an initial validations file, sets up the Readme, and cleans up the boilerplate files. Gets this repo ready to become public! 🥳

Changes

add first version of validations.yaml
- email
- lei
- rssd_id
- simple_us_phone_number
- tin
cleans up issue/pr templates with only parts relevant to the repo
updates the changelog for the initial version
added a basic package.json (making this a real NPM package in the future may be helpful
updates the CONTRIBUTING.md file to not include browser support information
removes unnecessary INSTALL.md file
creates the Readme file with examples, documentation, and usage instructions

Notes

Here's the completed open source checklist with ~ next to ones that aren't applicable:

Todos

post-mvp wishlist

Checklist

PR has an informative and human-readable title
Changes are limited to a single goal (no scope creep)
Code can be automatically merged (no conflicts)
Passes all existing automated tests
Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)
Reviewers requested

jcadam14

Looks good for our initial cut!

hkeeler · 2024-03-25T05:35:48Z

validations.yaml

+lei:
+  description: must be 20 characters and only contain A-Z, and 0-9 (no special characters)
+  examples:
+    - 123456789TESTBANK123
+    - 123456789TESTBANK456
+    - 123456TESTSUBBANK456
+  link: https://regex101.com/r/5AaT18/6
+  regex: ^[\dA-Z]{20}$


The above examples are not actually valid LEIs.

The 5th and 6th characters are supposed to aways be 00.

I think we can also tune up the regex to find other potentially invalid LEIs.

The last two digits are a checksum, so they should always be numeric.

The first four digits (the LOU code) may be only numeric. All the examples I see have it as numeric, but none of the references I've found are explicit about it. I also can't find a list of all valid LOUs, which you'd think would be something you could download off of GLEIF. 🤷

Anyway, I think we could safely do something like:

^[A-Z0-9]{4}00[A-Z0-9]{16}\d{2}$

That'd at least catch the reserved 00 and the checksum at the end.

https://www.gleif.org/en/about-lei/iso-17442-the-lei-code-structure

https://en.wikipedia.org/wiki/Legal_Entity_Identifier#Code_structure

https://lei.bloomberg.com/docs/faq#what-is-the-structure-of-lei

https://www.lei-worldwide.com/lei-format.html

Sounds good @hkeeler! We're going to need an update of the seed / DB data then too since those are the examples currently in the DB. 👍

But maybe that regex above isn't quite right @hkeeler, since it's only supposed to be 20 characters? So maybe it's:

^[A-Z0-9]{4}00[A-Z0-9]{12}\d{2}$

Ha wow it took some digging and looking at the ISO format but yeah GLEIF has it at https://www.gleif.org/en/about-lei/iso-17442-the-lei-code-structure also. Thanks Hans!

I wrote cfpb/sbl-project#187.

But maybe that regex above isn't quite right @hkeeler, since it's only supposed to be 20 characters? So maybe it's:

^[A-Z0-9]{4}00[A-Z0-9]{12}\d{2}$

Yes. Yours is correct. Somehow the LEI I was testing with was 24 characters long. I must have done something weird. 🤷

I'm also not 100% sure if the LOU number that prefaces the LEI will always be just digits? Seems like it is, but I assume they'd hop to alphanumeric if they needed to account for more LOUs that can issue LEIs. I can't find something on the GLIEF website that says digits only? The spec ISO 17442-1:2020 at least doesn't confirm only digits for that part of the LEI?

I don't know. I'm happy to start with assuming each LEI will start with a 4 digit LOU and see what the data team says? (I did get the original alphanumeric 20 char restriction after talking with the data team)

Ha I was using the same lib. So yeah for the sbl-project json updates we can add the correct LEIs, just the question of, along with the regex check do we want the backend to validate the checksum?

It's sounding like the may be legit reasons for an LEI to break the rules. There's certainly data in our current dataset that does. I think for this PR, let's keep it simple and just make it the original ^[\dA-Z]{20}$, and we can circle back soon with @nongarak and @Kibrael to find out more and decide if we want to do anything more.

Heh, what a ride! 🎢 I might make an issue to revisit this later. 👍

I'd like to keep the 2 digit checksum at the end at least? It's actually part of the ISO 17442-1:2020 standard so I'm hoping it's actually something that all the LEI data has? Mind checking @hkeeler?

hkeeler · 2024-03-25T05:37:46Z

validations.yaml

@@ -0,0 +1,36 @@
+email:
+  description: must conform to common email conventions using the W3C method of email validation which is only a subset of full RFC 5322 compliance as per https://html.spec.whatwg.org/multipage/input.html#email-state-(type=email)


Might be nice to have a

references: - https://html.spec.whatwg.org/multipage/input.html#email-state-(type=email)

...for links to any outside sources.

Sure! Should I then pop them out of the description and only put these links in the references section?

Updates from Hans

billhimmelsbach · 2024-03-26T04:42:36Z

Alright @hkeeler and @jcadam14! I've...

moved the validations.yaml to a src/ folder
updated LEI examples to include ones that follow all the conventions (123400TESTBANK000289) and one that only follows ISO 17442-1:2020 (TESTBANK123456789012) with a comment pointing to the issue to explore LEIs further
if @hkeeler gives me the 👍, used a regex that still has a check for 2 digits rather than just plain alphanumeric ^[A-Z0-9]{18}\d{2}$ and updated the link to reflect that
added references array, if there are no references I've left it null, but open to making it null explicitly, an empty array, etc
added error_text to make sure that the friendly errors presented to users on frontends can be kept in sync more easily with the regex
changed a little of the content for commas and capitalization

…e to package.json

billhimmelsbach · 2024-03-26T05:49:09Z

Heyo! I updated the PR description to get everything ready, so I think this is ready for final review @hkeeler @jcadam14. 🥳

hkeeler

Overall look great. Just the one bit about references.

hkeeler · 2024-03-26T06:39:43Z

README.md

+    - '9999'
+    - '1'
+  link: https://regex101.com/r/l3SyQi/3
+  references:


I didn't realize an empty value was a valid null in YAML, though I do see in the spec that it's valid. It does feel weird, though. You normally just don't include a given attribute if it is null, though you do occasionally see explicit NULLs. I also just leard ~ is also null in YAMLese. 🤷

Anyway, my vote would be to just exclude references for a given entry if we don't have any references for it.

I'd like to have some kind of linter/checklist someday to check to make sure people don't forget fields, so that was my thought behind the null values.

Happy to just exclude it though, so put up a commit for it.

billhimmelsbach · 2024-03-26T18:18:16Z

Hurray! 🎉

billhimmelsbach added 2 commits March 21, 2024 20:31

feat(validations): add validations yaml and set up repo docs

01c083e

feat(manifest): add the barest minimum package.json as a test

4b45fac

jcadam14 previously approved these changes Mar 25, 2024

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hkeeler reviewed Mar 25, 2024

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billhimmelsbach mentioned this pull request Mar 26, 2024

[Task] Revisit LEI regex validations #3

Open

billhimmelsbach added 3 commits March 25, 2024 20:59

fix(validations): lei examples and regex, references, comments

72cf5d5

chore(validations): move into src folder

20256f3

feat(validations): add error_text field

24edc4a

billhimmelsbach added 2 commits March 25, 2024 21:46

fix(validations): fix typo in lei description

55e8ca1

fix(validations): update readme, add a missing references, add newlin…

3076e9b

…e to package.json

billhimmelsbach requested review from hkeeler and jcadam14 March 26, 2024 05:49

hkeeler reviewed Mar 26, 2024

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fix(references): remove references when null

c351244

hkeeler approved these changes Mar 26, 2024

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billhimmelsbach merged commit c4f1aae into main Mar 26, 2024

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feat(validations): add validations yaml and set up repo docs #2

feat(validations): add validations yaml and set up repo docs #2

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billhimmelsbach commented Mar 26, 2024

		@@ -0,0 +1,36 @@
		email:
		description: must conform to common email conventions using the W3C method of email validation which is only a subset of full RFC 5322 compliance as per https://html.spec.whatwg.org/multipage/input.html#email-state-(type=email)

feat(validations): add validations yaml and set up repo docs #2

feat(validations): add validations yaml and set up repo docs #2

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Todos

Checklist

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