CFP-2203-01: Public REST API For Historical DEX Prices (2 600 DFI) #125
Comments
chrizog
changed the title
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Hey, pls read the Announcement: #103 All proposals are to be submitted by Monday, 31 January 2022 23:59:59 UTC and have its fee paid by the first block mined after the time. |
chrizog
changed the title
Hi, thanks for the hint. Since it was my first CFP, I was not sure about the process. I am sorry. Maybe I can keep it open as draft until the next round. Otherwise it can be closed and I will open a new issue, when the next round is announced. Thanks! |
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How do you get old DEX prices? Are you analyzing the whole defichain and all transactions to reproduce these prices? |
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cool idea |
uzyn
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Votes of the DFX CommunityIndividual votes can be viewed transparently here: https://docs.google.com/spreadsheets/d/1tvc1KhLuGGSCfUuZoDnTxqaLDurXcftd8MBA57YfhKQ/edit#gid=1139627798 Votes: signmessage 8KirKNGVgrsQsmWuy1Ee4ZmsnXVVkAEzh2 cfp-2203-01-yes |
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mnstate_validate.log |
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CFP payments have been processed. Please refer to #135 (comment) for detailed info and hashes. Thanks! |
and others
Overview
Purpose: A Public REST API For Historical DEX Prices - Data Is The Key!
The Problem
When I started writing an application that generates tax reports for Liquidity Mining, I quickly ran into the issue that there is no available public API for querying historical prices of the DEX. Not only me, but also other developers from the community often ask about these data. Furthermore, applications like dfi.tax require historical DEX data, as dfi.tax uses CEX prices for the dTokens which makes the generated tax reports inaccurate and do not represent the real earned value.
The lack of a public API for retrieving historical DEX prices hinders the development of more high quality apps around DefiChain. Developers do not have these data at hand, which makes some projects hard to realize and only with a lot of effort.
The Solution
A public API for historical DEX prices (and potentially more data) for everyone.
I implemented a prototype for a public REST API where anyone can query historical prices of the DEX for all poolpairs. The prototype runs currently for TestNet only. TestNet needs less ressources and less disk space on my low-cost server. It's a development server and not production ready in order to showcase you that it works.
With the API you can:
Example using curl:
There is an OpenAPI specification online, where you can also directly play around with the API and test it in your browser:
http://104.131.103.139:8000/dex_api/docs
Documentation Screenshots:
You can try it out directly in the browser:
How will the fund be spent?
The funds will be spent for development and infrastructure costs of the REST API.
Infrastructure:
Costs for hosting the full node for indexing data, API + domain: 70$ / month. I propose to cover the costs for one year: 12 * 70$ = 840$ (~ 740€)
Development costs for next 3 months: 3 months (12 weeks) with 10 hours/week and 60€/hour. = 12 * 10 * 60€ = 7200€ (42% of it will be taxes in Germany)
At a DFI price of ~3€ it's 2600 DFI.
What comes next
✅ Moving from the prototype for TestNet to MainNet data
✅ Proper API Documentation
✅ Improving stability of the API (currently it is a development server), rate limits, improvement of response speed
✅ Additional features:
✅ Other types of data and features can be implemented if the community asks for it
How does this CFP benefit the DeFiChain community?
With the right DEX data available, new apps can be easily implemented for the community. Developers can focus on their area of expertise, e.g. UI/UX. There is no need for funding the development costs of projects, where one developer has to be able to do everything from backend to frontend and can't focus on doing one part really well. If developers can focus on the purpose of their app using existing data, more high quality apps can be pushed out within the community (generating tax reports, calculating the realised impermanent loss, etc..).
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