465 Curve-Finance
https://curve.fi/

466 Principal-Docs
https://smartcontracts.org/docs/base-libraries/Principal.html

466 HashMap-Docs
https://smartcontracts.org/docs/base-libraries/HashMap.html

466 Option-Docs
https://smartcontracts.org/docs/base-libraries/Option.html

468 Shared-Keyword-Docs
https://smartcontracts.org/docs/language-guide/sharing.html#_the_shared_keyword

468 Caller-Id-Docs
https://smartcontracts.org/docs/language-guide/caller-id.html

471 Upgrades-Docs
https://smartcontracts.org/docs/language-guide/upgrades.html

471 Array-Docs
https://smartcontracts.org/docs/base-libraries/Array.html

471 HashMap-Docs
https://smartcontracts.org/docs/base-libraries/HashMap.html

471 Iter-Docs
https://smartcontracts.org/docs/base-libraries/Iter.html

472 Internet-Identity-Explainer-Video
https://www.youtube.com/watch?v=oxEr8UzGeBo