- A proposal helps scam victims in the Polkadot community.
- Merkle Science wants to improve monitoring for bad activities using blockchain technology.
- They plan to start this project in December 2021.
- The proposal involves working with people from Web 3 Foundation and Polkadot Council.
- It includes developing new monitoring services for safety.
- The project will help track addresses linked to scams.
- They will use data from Subscan to calculate prices.

Awarded

This Proposal aims to provide a solution for cases of scam victims and other illicit activities in the Polkadot community. As a blockchain analytics provider, we understand the urgency for such a solution so, from our side, we are placing the Polkadot protocol on the top of our roadmap of blockchains to onboard in our monitoring and investigations solution. With the funds provided, we’ll not only be able to prioritize the launch in production (December 2021) but the ecosystem will have priority access to start monitoring all addresses under https://polkadot.js.org/phishing/.

Merkle Science has been working closely with Michalis (Web 3 Foundation) and RTTI-5220 (Polkadot Council) for over 2 months in shaping this proposal in the best way possible to meet the current and future needs for continuous monitoring and blockchain investigations by the Anti-Scam Response Team.

Proposal - [HERE](https://docs.google.com/document/d/1wR2hYa20PfBXjntTywm6vp179OL0HzJZYK0afDGy1vg/edit?usp=sharing)

- This proposal includes the development of phase 1 (a & b) + the monitoring services subscriptions. 

- DOT rate is calculated based on 30day avg tool by Subscan on 05.11.2021: https://polkadot.subscan.io/tools/charts?type=price


Merkle Science - Proposal: Polkadot Transaction Monitoring

- A free public API service for Polkadot and Westend nodes was created from July to September 2021.
- It helped many people use powerful nodes easily and supported existing projects.
- The service handled over 5.5 billion requests in three months and provided important data on how nodes were performing.
- Improvements included a new dashboard for partners and better tools for monitoring and recovery.
- The team aims to handle even more requests in the future and offers 500,000 requests for free daily.
- Users can access the API service through various links and can create their free API key.

[**You can read more details about this proposal, including detailed traffic and costings here**](https://docs.google.com/document/d/1SeXDFuhF3W5R0W7W86KEhQAKnGKQ75o-tBSsxyRi2ro/edit?usp=sharing)

### Original Motivation

Over the last 3 months (July, August, September 2021) we've provided a scalable free public API service so that everyone can access public pools of managed Polkadot and Westend nodes. This provides the following three outcomes:

-   Grow the ecosystem by reducing the barriers to entry to access a high performance nodes
-   Help scale existing projects in the ecosystem by providing infrastructure  services that can be depended on
-   Assist with the testing of all networks by providing valuable data back to the community on how validator nodes are running and scaling as the network traffic increases (we've made Github issues based on behaviour we've observed)

### Service Details

Between 2021-07-01 and 2021-09-30 our Polkadot API service has:

-   Served an unprecedented total of 5,506,995,252 (5.5 billion) requests
-   Accumulated almost 17 TB of data egress
-   The highest daily total was 87,529,840 requests in a single 24 hour period
-   Our rolling 7 day average at the end of this period was over 70 million requests each day.
-   Westend had over 96 million API requests in the period
-   All time totals for Kusama is 11,181,846,891 (11 Billion) since November

Note: We have implemented custom middleware in our platform that counts and logs these requests, [you can view the raw data here](https://docs.google.com/spreadsheets/d/1IpvVytzsaekxm8EmvWXsxrdq2AF1di7Q9O9rWHoraFM/edit?usp=sharing).

![](https://lh6.googleusercontent.com/lSOA6TwTODWmplqAKLeg2CvB-RCT2ANpwQiQcVVyAsZe98NOyAflbV-qYEixrrWVdLZcN-tmlliKPh51L4nOUkomq0pF6t6XWc0DI_jJDkxhUB9qMlnOic0wWMEy6zLMRZoXpBee=s0 "Chart")

### Enhancements

Additionally, we are proud to have delivered some key service enhancements (on our own cost) that benefit the Polkadot ecosystem in the last quarter. This includes:

-   An improved dashboard for our partners so that they can monitor usage and manage the upgrades of the nodes in real time.
-   Collection of a rich set of metrics and usage data that is securely shared with partners to help them scale and develop their network.
-   Improvements to our routing strategies and scale enhancements to our load balancer with the goal of scaling to a Billion daily requests.
-   A variety of improvements to our health metric collection tools and automated recovery scripts to ensure our 99.9% SLA is met.
-   Scale improvements to our team, processes, and systems to allow us to provide this same service to every parachain team at launch

You can always see live data on our API service on our public [status page](https://status.onfinality.io/).

We continue to reaffirm our dedication to providing free support of 500,000 requests to our API service each day for users around the world. You can access our public API service by connecting to it using [Polkadot.js](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fkusama.api.onfinality.io%2Fpublic-ws#/explorer) or via the endpoints listed below. You can also [create your own free API key in our application](https://app.onfinality.io) and track metrics and statistics.

-   https://polkadot.api.onfinality.io/public
-   wss://polkadot.api.onfinality.io/public-ws
-   https://westend.api.onfinality.io/public
-   wss://westend.api.onfinality.io/public-ws

[**You can read more details about this proposal, including detailed traffic and costings here**](https://docs.google.com/document/d/1SeXDFuhF3W5R0W7W86KEhQAKnGKQ75o-tBSsxyRi2ro/edit?usp=sharing)

OnFinality - High Performance Public Infrastructure (Q3 2021)

- Pinknode is a platform that helps people use Polkadot, a special kind of technology.
- It provides tools and services that make it easier to build things on Polkadot.
- The platform started in June 2021 and has helped users make over 200 million requests.
- Users can sign up for an account to access these tools or use free public options.
- There are plans to improve the platform to make it easier for users to manage their projects.
- Improvements will help users understand how they use the tools and work better with their teams. 
- Pinknode is focused on helping developers make cool projects on Polkadot.

Pinknode is a node-as-a-service platform specialized in providing quality API endpoints and node operation services to the users in the Polkadot ecosystem. Our mission is to support the Polkadot protocol in achieving its vision of a multi-chain future through providing easy-to-use, reliable, and scalable infrastructure services which removes an entire layer of complexities for developers to start building on Polkadot/Substrate.

We launched our MVP in June 2021 offering free API endpoint access to users to both Polkadot and Kusama mainnets and testnets. We've served more than 200 million requests through our users' custom endpoints and public endpoints. You may begin utilizing our endpoints by signing up for an [account](https://app.pinknode.io/) or through our public endpoints listed [here.](https://apps.pinknode.io/#/explorer)

In our Phase 1 proposal, we will be detailing our plan to enhance our front-end for better user experience, management and monitoring capabilities. With these planned enhancements, our users will be able to:

- easily manage their project keys

- uncover valuable insights into their usage methods and patterns, which will positively influence the development of their dApp

- collaborate effectively with other team members to manage infrastructure needs

This will help advance the developer team’s operational capabilities by providing greater ease of use, visibility, and enhanced account management.

You can find out more about our proposal [here.](https://docs.google.com/document/d/12T2-2fmBHMFyuqFk4NgdameXZ2bW6AUUOCGdBA7AeH0/edit?usp=sharing)

- This submission covers Phase 1

- Polkadot rate at $32.623 as per [Subscan 30 day EMA](https://polkadot.subscan.io/tools/charts?type=price)


[Link to recent discussion.](https://polkadot.polkassembly.io/post/626)

Pinknode - Proposal: Improved dashboard for managing infrastructure

- A person wants to write a book about Polkadot, which is a network like Ethereum.
- Many books exist about Ethereum, but almost none are about Polkadot.
- The goal is to make a simple book that anyone can understand, even if they are not tech experts.
- They think it's important for more people to learn about Polkadot.
- A draft of the book is almost finished, and they want feedback to improve it.
- The book will be available for free under a specific sharing license.
- The request for funds to support this project was made on June 16, 2021.

**Proponent**: **12WarfbFeUm5L9Fs5zkTaQQH7L5hqaGPEgM9vQ1UFK8kiUSK** 

**Date**: 16th June 2021

**Requested DOT**: 829 DOT (in 3 installments @ $30.156/DOT using Subscan’s 30 day EMA) = ~$25,000 

**Short description**: Although Ethereum is a much less complicated system, google ‘books on Ethereum’, then google ‘books on Polkadot’. You’ll notice that while there are more than 10 books on Ethereum, Polkadot (the network) has nothing. Of course, this is more a sign of age than anything, but I’m proposing a way to start our journey.

This proposal brings to light the lack of a holistic and easy-to-understand explanation of Polkadot in a book form. It outlines the importance of a book and proposes a solution to create one. But not just another book about blockchains but one focused on Polkadot and written from a totally non-technical perspective.

Please visit this [link to read the full proposal](https://docs.google.com/document/d/11NT6BzM8nOcbXR7wD1C2IJlsi0XyeJaS5Hv50Wy4rJ0/edit#)

**A first draft has already been drafted** (90% finished). You can view the [first draft here](https://docs.google.com/document/d/15p4Xy-I6_44zexCsPcZXHHlCj7L3Jcddle_8567B3x8/edit#). Please leave your feedback to help shape the second draft.

**The book will be published under a Creative Commons License (CC BY)**

**Edited on 6th Oct 2021.*

Proposal to expand the Polkadot ecosystem with a book for blockchain beginners

- Klever is a cryptocurrency wallet that wants to include Polkadot in its services.
- They already support Kusama and aim to expand into Polkadot now.
- Klever Wallet has over 2.5 million users and helps manage crypto safely.
- It allows users to hold, send, receive, and view their transactions.
- The wallet works on both iOS and Android devices.
- Users can stake their favorite projects and swap coins easily.
- Klever offers 24/7 support and values user privacy with no registration needed.

**Treasury request**

Klever all in one Cryptocurrency Wallet is proposing to expand into the Polkadot ecosystem. We have already included Kusama. We now continue with Polkadot inclusion. The objective of this post is to request treasury funding for Klever team to include Polkadot in the Klever Wallet. This proposal will focus only on Polkadot at this time.


**Intro to Klever**

Klever is a crypto wallet ecosystem serving over 2.5 million users worldwide and over 500k monthly active users on Klever App, Klever Swap, and Klever OS. Klever currently has a staff complement of 50 developers and a 24-hour support team with approximately 20 additional employees. Klever App is a simple, powerful, and secure self-custody crypto wallet, supporting the world’s major blockchains. The app offers 300+ trading pairs in Klever Swap and access to ETH and TRX-based DApps in Klever Browser. Klever is supporting over 190 countries and 30 different languages at this stage.The Klever App provides the following functionality

- Multi-cryptowallet : supports basic features like hold, send, receive, transaction history and balance. Currently supports 10 blockchains that includes BTC, ETH, TRX, XRP & LTC. Klever is actively adding more blockchains
- Multi-Platform : support both iOS and Android. Available in the respective stores for download
- Staking feature : stake on your favourite project and earn passive income
- Swap : convert coins just in one click.
- Buy : support to buy crypto with credit card and apple pay
- Browser : ability to use website/dapps and allow the mobile wallet to interact with dapps directly. Confirm spend like one would do in metamask. Essentially Metamask in your hands
- Security : Klever utilizes the latest military-grade technology for encryption. Also supports facial recognition to open your mobile wallet
- Address Book : like contact list but for crypto, to make working with accounts easier
- Invite friends : always easier to onboard new users with a referral link
- Help center : 24/7 support, also FAQ and tutorials
- No registration / KYC : your data is only your data
- Klever news : easy way to distribute hot news per blockchain we support or news around additional features added to the wallet

We look forward to expanding these features into the Polkadot ecosystem.

Please find a copy of our complete proposal here full [link](https://docs.google.com/document/d/1xMxCP6ec3C8264hP7JFwcPCUw4kzlZ_SdDrm58Fs4iA/edit?usp=sharing)

- This submission covers milestone one and two
- Poladot rate 29.966 USD DOT(Subscan tool)
- [Link to recent discussion](https://polkadot.polkassembly.io/post/627) 


#70 Klever Mobile Wallet Inclusion of Polkadot (Milestone one and two)

- A person proposed a plan on September 20, 2021, to improve Polkadot-JS, a special wallet for using Substrate.
- They asked for money to help make the wallet easier to use and to take care of it for a few months.
- The proposal wants to update guides to help people understand how to use the wallet better.
- They planned to work on two key parts: making the wallet's design nicer and keeping it running smoothly.
- The total amount they needed was about $6,435.
- The proposal includes links for more details about the improvements planned.

**Proponent:** 1ZUG7957Gfidjgm6sg4EZfFtKpJLXSWDRY7o5d1JGKJLoMM

**Date:** 20.09.2021

**Requested DOT:** 209.50 (Rate: $30.718 USD/DOT which is equivalent to $6,435 USD)


**Short description:** Polkadot-JS was the first wallet developed for the Substrate ecosystem and it is still the go-to wallet today for Relay chains’ and Parachains’ operations. Therefore, it is important that current and future users have access to information about Polkadot-JS’ full functionalities to manage their account operations independently.

[Guide to Polkadot-JS](https://anaelleltd.github.io/polkadotjs-guide/) provides step-by-step instructions for Polkadot-JS Extension and Apps, but it needs to be redesigned and updated to provide a better browsing and educational experience. This proposal is to request funding for these improvement and maintenance items.


**Payment conditions:** This proposal covers funding for the following costs:
1)	UX and UI improvements (Milestones 1 & 2).
2)	Ongoing Maintenance for September, October, and November 2021 (Milestone 3).

The total DOT allocation for this proposal was calculated using the [30-day average rate tool](https://polkadot.subscan.io/tools/charts?type=price) by Subscan on the day of on-chain submission.


You can find the full proposal (including links to all milestones) [here](https://docs.google.com/document/d/1mpfMQfrkd8eJ1BVwur4uz8fm-JIlhs5pGqSx8y283ZU/edit?usp=sharing).


Thank you! :)


Guide to Polkadot-JS – UX/UI Improvements and Ongoing Maintenance Proposal

Subscan is a tool that helps people explore different blockchain networks like Polkadot and Kusama. Here are some key points about it:

- Subscan has been helping track blockchain activity for over a year.
- It has many users, but the growing number is making it harder to keep the service stable.
- Subscan needs more money to maintain its service and is looking for help from Polkadot Treasury.
- In the last few months, the costs for running the service have been high, totaling around $23,893.
- Most of the money goes to computing services to support its functions.
- Subscan is starting to make some money but not enough to cover all its costs.
- They have also created a service status page for users to check on performance and issues.
- Subscan wants to be financially independent in the future.

> Past discussions: [https://polkadot.polkassembly.io/post/610
](url)

Subscan is an aggregated Blockchain explorer for Substrate-based chains. We have supported several chains, such as Polkadot, Kusama, Westend, and Rococo, for more than one year. We have seen an encouraging trend in the number of users and their level of activity. However, with the rapid growth of users, stability and reliability in infrastructure are becoming a challenge. As a result, Subscan has to expend more resources to ensure the quality of the service.

In the long run, we foresee Subscan is being a financially independent service. Although Subscan is starting to generate some revenue, it currently falls short of supporting the infrastructure costs. Therefore, we are looking for financial support from Polkadot Treasury to help to continue providing a realiable explorer service to the community.

## Current Service Scale of Subscan

Below are some metrics from Cloudflare and Subscan's monitoring system for the last few weeks.

*Subscan traffic overview:*
![](https://github.com/itering/subscan-treasury-proposals/raw/master/infrastructure-costs-2021-june-to-august/subscan-cloudflare.png)

*Subscan API traffic and distribution:*
![](https://github.com/itering/subscan-treasury-proposals/raw/master/infrastructure-costs-2021-june-to-august/subscan-qps-per-network.png)

As the charts demonstrate, Polkadot, Kusama, Westend, and Rococo are the major user traffic of Subscan. This request-per-second value is showing a decreasing trend from ~80% the last time we submitted the proposal to ~70% currently.

We also launched the [service status page](https://subscan.statuspage.io/) in the last few months. In order to improve the transparency of the Subscan service, several core metrics of our backend have been published on it. Any user in the community is able to watch the incidents, scheduled maintenances, real-time request success rate, service response time graph, etc.

![](https://github.com/itering/subscan-treasury-proposals/raw/master/infrastructure-costs-2021-june-to-august/subscan-statuspage-metrics.png)

## Billing Info

The infrastructure cost refers to what we have spent on Google Cloud Platform.

### June 2021

![](https://github.com/itering/subscan-treasury-proposals/raw/master/infrastructure-costs-2021-june-to-august/cost-table-june.png)

Subtotal in June: $7,384.03

### July 2021

![](https://github.com/itering/subscan-treasury-proposals/raw/master/infrastructure-costs-2021-june-to-august/cost-table-july.png)

Subtotal in July: $7,865.29

### August 2021

![](https://github.com/itering/subscan-treasury-proposals/raw/master/infrastructure-costs-2021-june-to-august/cost-table-august.png)

Subtotal in August: $8,643.68

### Total Amount

`$7,384.03 + $7,865.29 + $8,643.68 = $23,893`

*Compute Engine*, *Cloud Logging*, and *Cloud SQL* are the three primary services, among which *Compute Engine* alone `constitutes around 70%` of the total cost. Detailed billing info and other relevant proof are available upon request.

The estimated infrastructure cost we spent on Polkadot, Kusama, Westend, and Rococo adds up to `$16,725` according to the request distribution chart. Therefore, the amount we are requesting is `568 DOT (1 DOT ≈ 29.40 $USD)`. Such support is indispensable for our goal to capitalize on economies of scale.

## References

- Subscan for Polkadot Network: https://polkadot.subscan.io/
- Subscan Service Status: https://subscan.statuspage.io/

The source code of this proposal is hosted on [GitHub](https://github.com/itering/subscan-treasury-proposals/blob/master/infrastructure-costs-2021-june-to-august/).

The Infrastructure Costs of Subscan for Polkadot Network from June 2021 to August 2021

- The proposal aims to grow the Polkadot community for Spanish speakers by creating an Educational Hub.
- The hub will help ambassadors and community members learn about the Polkadot ecosystem in Spanish.
- There is a need for more information, as many find it hard to understand only English resources.
- Plans include a special website with tutorials, blog posts, and translations of important documents.
- The website will allow community members to submit their own content.
- They also want to provide information about validators and staking, and offer resources to learn programming languages related to Polkadot.
- This project is the first step, and more plans will come later after feedback is reviewed.

**Proponent**: 1ndvErzA6F2gHFXwEqjcPd7qtGnsZDiStpSj4A8LytDJRhf

**Date**: 14.09.2021

**Short description**: This proposal is focused on increasing the Polkadot Spanish community with the development of an Educational Hub for Spanish community and ambassadors. 

As ambassadors we need information about the Polkadot ecosystem, we have been searching and translating documentation to participate in events since last year. We also notice requests for this kind of information in social networks, official and unofficial chats, frequently. We have seen the limitations of English communication in the community. The complexity of the protocols and the ecosystem requires additional information and an easy way to explain the system.

To solve the necessity of the community, we believe that it is important to explain the ecosystem in an easy way, and in Spanish, to give tools to the community to participate in the Polkadot ecosystem.

As we know, some people are working on tutorials, translations, or blog posts but there is not an integrated, compiled, and organized information system for this community, and we aim to establish one for the Spanish and Latin American communities. 

We consider that development of the Spanish community (Spanish language) should be through different actions and activities, building content in communication channels:

a.- Development of a Spanish community Polkadot webpage.

b.- Guidelines and Tutorials about Polkadot Ecosystem.

c.- Spanish content as blog posts, guidelines, papers and more about Polkadot.

e.- Translations of Polkadot and Kusama Wiki and official documents and research of important
information in the ecosystem.

We are considering creating a website integrated by video tutorials, translations, official information, blog and news. All to increase the Spanish Community engagement. 

We have taken into consideration community  and council feedback and we will include into the proposal:

1.- Section to add to the website a submissions form: to submit article / video / tutorial to be published on the website 

2.- Information related with validators and staking.

3.- For the third part we could create a space to learn and develop the languages applicable to the DOT, including Rust. 

For milestones, budget, wireframes and reasoning behind the proposal please visit [THIS DOCUMENT](https://docs.google.com/document/d/1vj95yKquBI_qzoejMvljfmShqLvoE8p6S0gDwGt2-nY/edit?usp=sharing).

Please note:

- this proposal covers the first part of development subsequent parts will be submitted onchain after council review and evaluation of development report. 

- DOT rate calculated based on [30 day avg tool by subscan](https://polkadot.subscan.io/tools/charts?type=price).

POLKADOT EDUCATIONAL HUB IN SPANISH

- The proposal asks for help from the Polkadot Treasury to support a group called the Polkadot Ecology Research Institute.
- This group wants to create better Chinese content about Polkadot, making it easier for Chinese speakers to understand.
- They plan to update people on new projects in the Polkadot community.
- The goal is to help more people learn about and get involved with Polkadot.
- Since June 2021, they have been using money from the Polkadot Treasury and completed their goals for June and July.
- They are requesting about $86,250 for six months of operation from September 2021 to February 2022.

The proposal aims to seek support from the Polkadot Treasury for the 2021/9-2022/2 operating cost for the Chinese non-profit organization Polkadot Ecology Research Institute, in order to create more original and quality Chinese content, and to relay the otherwise boring technical language to Chinese users in a colloquial way, so that Chinese users can have a real knowledge of Polkadot and increase the breadth of Polkadot in the Chinese market. On the other hand, we will also follow up on the outstanding projects of the Polkadot ecology to keep everyone informed of the latest developments of the Polkadot ecology.

Polkadot's success cannot be separated from the prosperity of the Polkadot Ecological Projects. Our goal is to make more people aware of Polkadot and also to make more people aware of the development of Polkadot ecology, which in turn will lead them to join in the participation and construction of Polkadot ecology, so that Polkadot and Polkadot ecology can flourish.

Since June 2021, we have established a Polkadot Treasury for our June/July/August operation cost, and get funding from the Polkadot Treasury. We have completed all the goals in June and July. Please check [our report for June and July](https://docs.google.com/document/d/1xrIybVA7QH9MCzZs7nZyXNQleKRBc4k4ZVsabUFf6qM/edit?usp=sharing) to learn more. 

So this is a proposal for our six months operation cost. We apply approx 86,250.00 USD total allocation for 2021/9-2022/2 while DOT=23.514 USD (DOT rate calculation using 30 day avg rate tool from Subscan [here](https://polkadot.subscan.io/tools/charts?type=price) )and you can get all details [here](https://docs.google.com/document/d/19is5Ihn_0HEfOwUbsaDQzX7n89oRlWYwpt6eDWeabw0/edit?usp=sharing).

Treasury proposal: The 2021/9-2022/2 operating cost for the nonprofit organization Polkadot Ecology Research Institute

- Lumos Labs held a successful online event called Polkadot Buildathon India.
- This event lasted for 9 weeks, from March 2021 to May 2021.
- It helped many people learn how to build on blockchain and meet others in the community.
- There were over 1230 applications, with 695 submissions in total.
- Three teams won prizes from a total of $14,000 in grants.
- Lumos Labs is now planning the next steps to help developers in India.
- They discussed starting an Incubator program and hiring a Developer Evangelist.

After a successful Inaugural India Hackathon i.e Polkadot Buildathon: India, in collaboration with the Web3 Foundation, we at Lumos Labs are excited to explore the next phase in the development of Web3 Ecosystem in India. Polkadot Buildathon India was an India Focussed 9-week online Hackathon that provided great opportunities to learn how to build a blockchain, join a talented, global community and show off your talent as a developer!

The program ran from March 2021 to May 2021. During this, We received over 1230 Applications, 695 Submissions, 120 Local Node Submissions.

3 Teams won the Hackathon from a Pool of USD 14,000 as Grants.

Post the success of the Hackathon, Lumos Labs discussed the next set of challenges and opportunities to the Indian Developer Ecosystem and how we can address them on a grassroots level. This proposal Covers our vision for the next phase.

Lumos Labs had a discussion with various teams earlier in July and validated the concept note and the need for an Incubator program was identified along with hiring an India Developer Evangelist.

Full Proposal Can be Found [here](https://docs.google.com/document/d/1baguf0SrqAJ24DQXMc6qdLuASN9449DBHQt9d5FYVvA/edit)

Link to the original discussion provided [here](https://polkadot.polkassembly.io/post/571)

Please note that this submission covers phase 1 only, we will report back to the council at the conclusion of phase 1.

Polkadot India Incubator Launch and Evangelist Hiring Proposal - Lumos Labs (Phase 1)

- The university program is asking for £30,000 in funding to support a hackathon.
- They want to receive 2210.70 DOT, which is money based on a recent price.
- Their goal is to have 500 people sign up for the hackathon.
- They hope that 100 teams will complete the hackathon.
- The proposal has full details available in a linked document.
- Only the person who posted the proposal can make changes to it.
- The proposal includes special code information related to its creator.

As part of our university engagement programme (see [here](https://docs.google.com/presentation/d/1LLFxCpO7y1fyIfcdTpDQGkbuPoGy2mFvlusYb1tTe74/edit#slide=id.gc2bb29227c_0_1294)), we would like to request our second phase of funding (£30k in DOT). For the second tranche, we are asking for 2210.70 DOT (based on the 30 day moving average ($18.799 on [Subscan](https://polkadot.subscan.io/tools/charts?type=price))) to cover the cost of the hackathon. With this second tranche funding, we aim to achieve the milestone of delivering the hackathon in full, having 500 individuals sign up and 100 teams finishing the hackathon.

Please find the full proposal [here](https://docs.google.com/document/d/1_KKLmwPiJw_PVzhX6nNiqhwfPQ-8-5vPaWdFutTffUw/edit?usp=sharing).

This is a treasury proposal whose proposer address (16kkgkzjyJZL91WaL6GAUJnTZjiaowZcFyHAs5GWCNVqJimJ) is shown in on-chain info below. Only this user can edit this description and the title. If you own this account, login and tell us more about your proposal.

Encode Polkadot Club - Tranche 2 proposal

- PolkaWorld is the biggest Polkadot community in China.
- This proposal is to request money for running costs for September, October, and November 2021.
- For two years, PolkaWorld was funded by the Web3 Foundation.
- They help by translating articles and organizing events to teach about Polkadot.
- In June 2021, they made a contract with the Polkadot Treasury for funding.
- Monthly reports are available to see their progress.
- They have a budget for the next three months available for review.

This is a social contract between PolkaWorld (the biggest Polkadot Chinese community in China) and the Polkadot Treasury. This proposal is aimed to cover the operational costs of September, October and November 2021!

PolkaWorld is the first Polkadot Chinese community. For the past two years, PolkaWorld was running as an independent Polkadot Chinese community funded by Web3 Foundation. We contribute to the Polkadot community by publishing Polkadot Chinese articles (translated from Polkadot Blog/wiki or produce the original content), interviewing Polkadot eco-constructors, and organizing Meetup/Polkadot China Tour /Substrate Workshop and Substrate Hackathon in different cities in China to help people learn Polkadot well and build a strong Polkadot Chinese community!

Since June 2021, we have established a Social Contract with the Polkadot Treasury, and get funding from the Polkadot Treasury. Please check our monthly reports ([June](https://docs.google.com/document/d/1XZItg6tBjvSomlybY0jEhBwmDOCzYfsxiNSRYXQYjCE/edit?usp=sharing), [July](https://docs.google.com/document/d/1rfFq1Qqsr-E1oCjIlClBgq5nqBpnawp2C21hujDSFK0/edit?usp=sharing), [August](https://docs.google.com/document/d/11Tl9WeB7tW-VTGcTVl5bO4DsQz1rJw5rbZIbAqX_BAc/edit#heading=h.dkwc058ylu6g)) to learn more!

And the timeline breakdown and budget for next 3 month [here](https://docs.google.com/document/d/1IF69BmfIq0eb4J17Vgq7-we8DarFUZDvg5bmUQ9dhe0/edit#)!

A Social Contract between PolkaWorld and Polkadot Treasury - Ops and Maintenance proposal

- OneBlock wants to organize a Summer Polkadot Hackathon in Hangzhou, China.
- The hackathon will need funds for operations and prizes for winners.
- OneBlock helps teach Substrate technology and has trained over 1200 developers since 2019.
- Many students from OneBlock have become important leaders in the Polkadot projects.
- The first Polkadot hackathon in March 2021 was very successful.
- The summer hackathon aims to attract more people to learn about Substrate and join the Polkadot community.
- The goal is to create high-quality projects and a strong Substrate ecosystem.

This proposal aims provide funding for the Summer Polkadot Hackathon by Oneblock in [hangzhou], China - for operations and winners prizes. 

OneBlock is a dev community with the focus on the Substrate online courses and Substrate hackathon program for the Polkadot ecosystem in APAC. OneBlock is committed to advocate Substrate technology and cultivate the Substrate ecosystem. As early as the year of 2019, OneBlock already started the early efforts of Substrate courses and cultivated more than 1200 Substrate developers as of now. Lots of the students from the Substrate courses of OneBlock become founders, CTOs, and core developers of the early Polkadot ecosystem projects. We also successfully delivered the spring Substrate hackathon in March with over 110 participating individuals in 33 teams and a high-profile judging panel with the people from Parity core devs, top VCs, top blockchain tech medias, top community leaders, etc. 

[The first polkadot hackathon](https://docs.google.com/document/d/1h9fsn9Yimic2PI53hjAGnFZShLQ8g6hSfDFYz4ujawY/edit#) in March 2021 was a success and it indeed helped to promote Substrate as an open-source framework for developers and convert the Substrate students from our ongoing Substrate courses to actually use Substrate to build projects. Receiving warm feedback from the developers, OneBlock decided to have a second (summer) Substrate hackathon and hereby submit this proposal for the necessary financial support on this event. 

This summer Substrate hackathon, along with the entire Substrate hackathon program of 2021,  has clear goals to 1) attract more Substrate enthusiasts to learn Substrate and participate in the Polkadot community, 2) influence developers with ambitions to deliver more high-quality Substrate-based projects and 3) build and grow a robust, diversified and healthy Substrate and Polkadot ecosystem. 

 here and you can get all details [here](https://docs.google.com/document/d/1Ujln1u9k8MpjMVbwi06LbtSLBasmqzf0C3KNybPnC_0/edit?usp=sharing).

Please feel free to comments!

@OneBlock The second Polkadot Hackathon Proposal 

- Winkrypto proposed a plan to help Polkadot become more popular in the Asia-Pacific region.
- They want to use media and marketing to reach more people interested in blockchain technology.
- Winkrypto will work with ChainNews, a well-known blockchain media company.
- The plan includes promoting Polkadot events, projects, and strategies to grow its audience.
- They will create articles and news about Polkadot activities and projects.
- Winkrypto is asking for 2041 DOTs, which is about $30,000, to fund this project.
- This plan aims to help Polkadot gain more visibility and community support.

Treasury Proposal

This Proposal to Polkadot Treasury aims to boost the brand recognition of Polkadot to a broader group of audience in APAC.

Proposer: （Winkrypto） DOT Address: 158fp6BNaiUF6G13EFeeditNz2YVQeMtY68M6D4pEqqCgrdC 

Date: July 28th, 2021 Requested DOT: 2041 DOTs (Rate: 14.698 USD/DOT as of the 28th July, which is equivalent of 30,000USD) 

Short description: The media and marketing plan to bring the brand awareness and community influence on a broader group of general blockchain audience.

Brief Introduction

Winkrypto proposes to provide a customized media and marketing service package to boost the brand recognition and community influence of Polkadot to a broader group of blockchain audiences in APAC through Winkrypto and ChainNews. Polkadot has gained good traction in the Polkadot audience but certainly, it has broad room to expand the media exposure and community awareness to the fast-growing broader general blockchain audience. Winkrpto and ChainNews (see the explanation of business relationship in the below section) are here to help to bring the general awareness of Polkadot in the Chinse-speaking community to another level.

Background

Winkrpto, together with ChainNews being the top blockchain media, can provide the top blockchain media and blockchain technology advocating service in APAC market, both to English and Chinese audience.

Why us?

ChainNews is the top tier professional blockchain media in Chinese speaking community. We have the top influence and resource to generate the best content with business insights and unique view and delivery the contents to the desired blockchain audience maximumly. Outperforming other blockchain marketing service providers, ChainNews aims to be the best service provider in this market sector.

What problem is the Treasury fund used to solve?

Polkadot gains pretty good traction in APAC marketing for the Polkdot audience in the time frame of late 2019 and the year of 2020. However the size of the general blockchain audience grows fast and there is still broad room for Polkadot to expand to gain the bigger size of the pie. WinKrypto as a top blockchain marketing service provider, together with ChainNews, the top professional blockchain media, is able to help Polkadot to achieve this goal and gain more audience in general blockchain pie. Winkrypto has the confidence to converte our business insight and deep understanding of the Asian market of the blockchain into the practical help and effective deliverables to Polkadot.

Winkrypto would design a customized yet comprehensive package to help Polkadot to gain wider exposure in media and community. We plans to generate the top quality content with the blockchain insider’s view and deliver these content through our media matrix for the maximum coverage of the blockchain audience in the APAC market. We will also provide the deliverable and the performance report (ok to work with your local team to design the performance tracking mechanism) periodically.
 
Solutions

The General Plan of 2021

Winkrypto and ChainNews offers a customized service package to improve the overall Polkadot brand, increase media exposure, and broaden community awareness.

Following are the three folds of the plan,

1） Publicize official events from Polkadot and the aligned community partners in the Asia Pacific (Will work with Polkadot’s local teams and local community partners in APAC)

The plan of 2021 includes but not limited to the following major official events (currently six major ones)

• 4 Substrate Hackathons

• 2021 Web3.0 Bootcamp

• 2021 Web3.0 Forum

For each event, Winkrypto and ChainNews provides the following media support,

• A long introductory article about the event, including the way to sign up or how to buy tickets. (Note: Will work with Polkadot local team to produce the article and content. Winkrypto polishes the article and provides publishing channels.)
 A post-event summary with photos, videos, or any available rich media materials (Note: Will work with Polkadot local team to produce the article and content. Winkrypto polishes the article and provides publishing channels.)

2）Publicize outstanding projects in Polkadot Ecology

2021 Polkadot Ecology Outstanding Projects: Outstanding projects that emerge from Polkadot boot camps,Substrate Hackathons, Substrate Courses, and Substrate Workshops.

Currently, it is estimated to have the size of 10 projects of the year 2021, and the media support for each project includes,

• A Breaking News about the project that has won an award or performed well at the Polkadot event.  An Introductory article about the project (founding team, the vision of your project, the project features, product roadmap, the projection of the project, etc.)

Besides these 10 projects, special merit projects may also receive ad-hoc reporting and media support per the recommendation of the local team of Polkadot and their local community partners.

3.	Publicize the strategy of Polkadot Ecosystem development in APAC from the local team of Polkadot

• The comprehensive support to Substrate Devs in Polkadot Ecosystem • APAC Strategy of Polkadot Ecosystem Development

In a nutshell, the quantity of the breaking news and article are listed below:

Activity – 12 Articles Project - 10 Articles & Breaking News Polkadot Team- 2 Articles

You can review the full proposal [here.](https://drive.google.com/file/d/1by1Y690P8-ZgNbqAOD3qCLNT-BX3T_P_/view?usp=sharing) Please leave your comments!


Marketing and PR Proposal for Polkadot in APAC

- Subscan is a special tool that helps people explore Substrate-based blockchains like Polkadot and Kusama.
- They have been growing in users but faced problems with attacks called DDoS.
- To stop these attacks, Subscan started using a special system called Cloudflare as a firewall.
- Cloudflare helps protect Subscan from harmful traffic and keeps it running smoothly.
- Subscan wants to upgrade to Cloudflare's enterprise plan for better support and features.
- This upgrade will help make the service faster and more reliable, especially for users in China.
- The financial support for this upgrade is requested from the Polkadot treasury, costing 967 DOTs over three months.

> Past discussions: <https://polkadot.polkassembly.io/post/541>

Subscan is an aggregate high-precision blockchain explorer for Substrate-based chains. We have been supporting several influential blockchains, including Polkadot, Kusama, Rococo, and Westend for over a year. For many users, Subscan is their first stop in the blockchain world. As we continue to deliver new features and support more blockchains, our user base is on the steady rise. Therefore, high robustness and availability are currently among our major concerns.
## Why We Can't Do Without a Firewall?
In the past few months, we have become one of many victims of multiple DDoS attacks. For example, here are some of the screenshots from the Google Cloud Platform Load Balancer and our Nginx monitoring system during one of the attacks:

![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/cloudflare-enterprise-2021-august-to-october/chart-nginx-under-attack.png)

![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/cloudflare-enterprise-2021-august-to-october/chart-gcp-load-balancer-under-attack.png)

The attacker generated much more packets and requests per second than usual. This forced us to find a firewall to protect Subscan and filter out DDoS traffic. In the next few days, we enabled Cloudflare as our firewall and CDN provider. However, attackers still point to Subscan as a valuable target. The following chart from Cloudflare shows that it successfully prevented many potential malicious attempts in a day:

![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/cloudflare-enterprise-2021-august-to-october/cloudflare-firewall-analysis-june-21.png)

Fortunately, we are able to mitigate the impact of those attempts and Subscan has not had any major outage due to DDoS attacks since using Cloudflare.
## Why We Need the Cloudflare Enterprise Plan?
Up until June, we had been utilizing Cloudflare for some months. A considerable number of users reported multiple service interruptions in certain areas during the month. Benefit from the complete monitoring pipeline built by Subscan DevOps team, we noticed and observed the issues shortly after it was raised. For example, here are two dashboard snapshots on June 2nd and June 8th, which showing a very similar phenomenon:

![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/cloudflare-enterprise-2021-august-to-october/cloudflare-public-plan-incident-june-2nd.png)

![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/cloudflare-enterprise-2021-august-to-october/cloudflare-public-plan-incident-june-8th.png)

With careful diagnosis and analysis, we managed to pinpoint the cause. They coincided with some Cloudflare incidents of the Pro plan. The screenshot below recorded the announcement and postmortem by our DevOps team explaining the incident at that time:

![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/cloudflare-enterprise-2021-august-to-october/cloudflare-public-plan-incident-impacted-subscan.png)

After consulting with Cloudflare sales and support, we realized that the enterprise plan is a great choice that meets our high availability requirements, just as they suggested. Argo smart routing, one core feature included in the enterprise plan, can help us re-route the traffic during zonal network failures. The enhanced WAF rules can be even more accurate and effective in blocking the attackers. Beyond that, here are also several features that we can utilize to improve Subscan's accessibility and reliability.
## What Other Features Can the Cloudflare Enterprise Plan Offer to Us?
Opting into the Cloudflare enterprise plan will bring about other advantages besides higher availability.
For example, Argo smart routing promises an estimated increase of 30% in network latency.

Also, a relatively large proportion of Subscan users comes from mainland China, where Internet access can be unpredictable sometimes. With the Cloudflare enterprise plan, we can utilize their China network infrastructure to offer a faster and more reliable experience for visitors inside China.

The technical support for Cloudflare enterprise users is apparently better than other plans as well. We will be able to contact the support engineers, if there is any incident, via emails and even phone calls rather than just tickets. This allows us to become more proactive and advantageous in providing highly avaialble services to Subscan users in the Polkadot ecosystem.

## The Financial Support
We have received financial support from the Polkadot treasury during the past month, and such support proved fruitful. This proposal is for financing Subscan's upgrade to the Cloudflare enterprise plan, which amounts to 967 DOTs. This includes 5000 $USD per month, and 3 months in total (August 2021 ~ October 2021), according to the EMA30 price `1 DOT ≈ 15.5 $USD`.

The quotation of the enterprise plan for Subscan can be found on [GitHub](https://github.com/itering/subscan-treasury-proposals/blob/master/cloudflare-enterprise-2021-august-to-october/cloudflare-enterprise-quotation.xlsx).

In case we missed any information or you have any questions, please feel free to send us an inquiry.
## References
- Cloudflare Enterprise plan: <https://www.cloudflare.com/plans/enterprise/>
- Cloudflare Argo: <https://www.cloudflare.com/products/argo-smart-routing/>
- Cloudflare incident on June 2nd: <https://www.cloudflarestatus.com/incidents/zbzjv8sm3g94>
- Cloudflare incident on June 8th: <https://www.cloudflarestatus.com/incidents/2hnqwq90dlrk>
> The source code of this proposal is hosted on [GitHub](https://github.com/itering/subscan-treasury-proposals/tree/master/cloudflare-enterprise-2021-august-to-october).



Cloudflare Enterprise Plan for Subscan from August 2021 to October 2021

- The person has connected Kusama with DotScanner.com.
- They want to start working on parts 2 to 6 of a plan.
- These features will help both Polkadot and Kusama.
- They are asking for $854 for extra costs related to hosting.
- They request a total of 626 DOT to cover development and hosting.
- The money includes $8,400 for development work and extra fees.
- The current price of DOT is important for their budget.

  Greetings Council. 

Now that I have[ integrated Kusama with DotScanner.com](https://kusama.polkassembly.io/motion/324), I would like to begin the development of[ Milestones 2-6 of the proposal](https://docs.google.com/document/d/1CYklxaMkBfZvf2ZEHj-OXgbGjrnvLDFvvvCl7ZkQcYk/edit?usp=sharing). Features that will benefit both Polkadot and Kusama.

Additionally, I would like to request a premium of $854 to cover the largely increased hosting costs in July and August as I continue to develop these milestones.
![](https://i.imgur.com/gWvWQpW.png)

Thank you for your time and consideration!

**626 DOT request breakdown:**

560 DOT @ $15 (EMA 30) for the development ($8,400)

66 DOT @ $13 (current price) for the hosting fees described above. With the spend period still 11 days out and current volatile prices, the $13 valuation is to help ensure the value of the DOT can still cover the fees once released.



DotScanner.com Kusama Integration & Extra Features Milestones 2-6

- The proposal is for rewarding the Polkadotters community, started in August 2020, for all their activities.
- The community is the largest Polkadot group in the Czech/Slovak region and aims to expand internationally.
- The author has left their job to promote Polkadot and Web 3.0 as an ambassador.
- They share updates on social media: Facebook (4.3k members), Twitter (1.5k followers), and Medium (600 followers).
- The group has created over 60 articles in Czech and English and has 20k YouTube views on their videos.
- Other activities include founding the DOT Validator Alliance, educating others, and participating in events and hackathons.
- They are asking for 2,736 DOT (about $41,280) to cover their contributions to the community.
- The author welcomes feedback and is open to adjusting the proposal.

The purpose of this proposal is to reward all the activities by the Polkadotters community that was founded in August 2020. We have started the biggest Polkadot community in the Czech/Slovak region that is nowadays a central hub for all Polkadot users from the region. But our plans were always to go international and therefore we created a Polkadotters brand and started to publish everything in English as well.
The reason why we are asking for this reward is that I left my full-time job in order to become a Polkadot ambassador and devote my professional life to the promotion of the Polkadot and Web 3.0 vision. I didn't have any other means of income except being a validator (Polkadotters enjoys the freedom of the press by not being paid for promotions or marketing :-) 

I know we should have asked for this some time ago but I finally got the courage to reach the Polkadot council for our support as of now. 

A detailed version of our proposal with calculations and rationales can be found [here](https://docs.google.com/document/d/1iYqRt1ZB1E1XSZhwk5zH1J8Io_SkjtH8MINl9-ibN8k/edit#heading=h.4uhl8jouxvv5), however, I will try to sum up our activity over here as well

**Social media**

- Facebook (Polkadot CZ/SK) - 4.3k members
- Twitter (Polkadotters) - over 1.5k followers
- Medium (Polkadotters) - over 600 followers

**Content**
- Medium - over 60 original articles in both Czech and English
- YouTube - over 20k views on Polkadot videos in the Czech language

**Other activities**
 - founding the [DOT Validator Alliance](http://dotvalidators.org/manifesto)
 - education about Substrate and development (being a developer myself)
 - hackathon participation
 - promotion of Polkadot on various Czech cryptocurrency events
 - participating in testnets and helping projects to start their networks
 - and many others

I created this post as the basis for the discussion with the council since I am not sure how much I can ask and what's the view of the council on such a proposal. I will appreciate any feedback and I am looking forward to the council's response.  

According to the 30-day DOT price average, we are currently asking for 2,736 DOT or roughly $41,280. This includes all the activities we have been doing for the community as well as the creation of our content and spreading it out to the Polkadot communities all over the world. 

I am really grateful for the council's support and I am definitely open to the adjustment of my proposal. II tried to back my request with some numbers because I know it would be outright rejected s so here they are and I would love to discuss the details with you! Thank you very much :-)



 Funding of Polkadotters community

Metis is a special library being developed by Patract Labs to help build smart contracts with Wasm technology. Here are some key points about it:

- Metis aims to create a library like Openzeppelin, which is popular for Solidity contracts, making it easier for developers.
- It will include common contract components that are well-tested and secure, such as tokens and access control.
- Metis will help solve existing problems in current contract development by providing better tools and support.
- The library will adapt features to match different programming languages like Rust, which is used for Wasm contracts.
- Metis has a structured plan with several milestones to gradually add new features and support for developers.
- The first phase focuses on creating essential components and testing them to ensure they work well.
- By using Metis, developers can create smarter contracts more efficiently and with less confusion.

This is copy from [https://polkadot.polkassembly.io/post/469](https://polkadot.polkassembly.io/post/469)

[Metis](https://github.com/patractlabs/metis) will be the Wasm contract standard library developed by Patract Labs. Patract Labs will work with community forces to formulate various Wasm contract standards, develop corresponding implementations of ink! and Ask! versions, and conduct audits by professional institutions.

## 0. Motivation

We believe that in the Wasm contract ecosystem, a development library similar to Openzeppelin-contracts is very necessary. This is Metis. For the sake of simplicity and readability, the patterns and meta-language provided by this library should be as consistent with Openzeppelin-contracts as possible, so as to reduce the burden on developers and effectively absorb the experience accumulated in the Solidity ecosystem.

But you need to realize that the Wasm contract development based on ink! and Ask! is very different from the EVM contract development based on Solidity. Wasm's mature system support allows developers to use a variety of different languages and tools to develop smart contracts. Based on these mature or rapid iteration platforms, developers can enjoy a large number of underlying facilities support and development experience accumulation, but different languages and tools often have different considerations and trade-offs. This means that developers will use completely different codes to express the same mechanism and design, which will bring huge communication costs and mental burdens to the community.

Faced with such problems, we need to summarize and accumulate the implementation model in the development of smart contracts. This idea was introduced in the book "Implementation Patterns" by Kent Beck. The purpose of summarizing the implementation mode is to clearly and accurately express the developer's intentions and ideas through these clear patterns, so that "code that others can understand" can be implemented. In contract development, this idea is very important.

From Openzeppelin-contracts, we can see that it summarizes several implementation models in the development of smart contracts, such as the "contract expansion model" based on the Solidity inheritance grammar. These implementation models are valuable experience accumulated in the Solidity ecology. Of course, different languages have different ways of practicing these modes. Metis will implement these modes and provide corresponding support on different platforms. For example, in Rust, it is obvious that you cannot directly use inheritance to implement contract expansion. For this, Metis will provide code implementation examples and provide a series of help libraries to reduce the developer's mental cost.

Metis will be more than just a Wasm contract standard library. We hope that through the practice of Metis, we can fully inherit and absorb previous contract development experience while exploring the best practices of Wasm contract development.

## 1. Problem

At present, contract-based developers mainly face the following problems:

- Lack of reliable implementation of common contracts (such as ERC20)
- It is difficult to achieve contract combination and expansion similar to the Solidity inheritance mechanism
- Lack of a series of reliable public components to implement contracts
- Lack of experience accumulation and model summary based on ink! development contracts

The above problems severely limit the current ink!-based contract development ecology. Metis will solve these problems while avoiding the existing problems in Solidity.

## 2. Contract Standard Library

Metis will implement a series of common components, similar to the Openzeppelin-contracts development library. These components will be thoroughly tested and code audited. These components will be as consistent as possible with Openzeppelin-contracts, which can reduce the burden on developers and effectively absorb the experience accumulated in the Solidity ecosystem.

Metis will include the following components:

- Openzeppelin-contracts-like components, including basic Access and Security components, as well as Token and Governance components
- Component developed for ink! contracts, wasm-based contracts can support better abstraction mechanisms, and we can implement more complex and practical components
- Summarizing abstract components from mature contract projects, metis will absorb the experience and accumulation of the community, including both the mature Solidity ecology and emerging blockchain contract projects.
- The expansion of ink! contracts, including basic data structures for different scenarios, etc.

In the previous version of Metis, we will first implement Openzeppelin-contracts-like components for developers to use. These components include:

- Token: ERC20, ERC721, ERC777, ERC1155 and the expansion contract of the above Token contract
- Access: Ownable, AccessControl, TimelockController
- Security: PullPayment, ReentrancyGuard, Pausable

## 3. ink! component

Most of Metis development libraries are composed of contract components. In Solidity, the introduction of contract components can be implemented based on inheritance. Generally, the contract components will include the following parts:

- Component Storage: The storage state related to the logic of the component itself, these states do not need to be exposed to the outside
- Component Message: The externally-facing Message of the component
- Component Event: The event that the component's own logic will  emit
- Component internal interface: an interface for other logic in the contract to call

For example, common Ownable contracts:

```Solidity
abstract contract Ownable is Context {
    // Component Storage
    address private _owner;

    // Component Event
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    
    // Component internal interface
    modifier onlyOwner() {
        ...
    }

    // Component Event
    function renounceOwnership() public virtual onlyOwner {
        ...
    }

    ...
}
```

If a contract needs to be Ownable, just inherit the contract:

```Solidity
contract Escrow is Ownable {
...
}
```

Similarly, other components can also have Ownable through inheritance:

```Solidity
contract Pausable is Ownable {
  ...
  function unpause() public onlyOwner whenPaused {
      ...
  }
}
```

The intention of inheritance here is actually composition rather than an `is-a` relationship. Although excessive use of inheritance in Solidity will cause many problems, inheritance for specific intentions is still an important way to achieve it.

In contract development based on ink!, through metis, we can also achieve the same motivation based on generics and traits:

```rust
...

#[metis::contract] // metis contract macro, will use ink_lang::contract auto
mod flipper {
    ...

    #[ink(storage)]
    #[import(ownable)] // flipper import the ownable
    pub struct Flipper {
        ownable: ownable::Data<Flipper>, // data by ownable

        value: bool,
    }

    #[ink(event)]
    #[metis(ownable)] // TODO: event in ink! will refactor
    pub struct OwnershipTransferred {
        ...
    }

    impl Flipper {
        ...

        #[ink(message)]
        pub fn flip(&mut self) {
            // check owner
            ownable::Impl::ensure_caller_is_owner(self);

            self.value = !self.value;
        }

        ...

        #[ink(message)]
        pub fn renounce_ownership(&mut self) {
            ownable::Impl::renounce_ownership(self) // owner message
        }

        ...
    }
}
```

Metis assists developers to achieve the same function through a series of helper macros. In order to improve the auditability of the contract, here we hope that users clearly implement storage, event and message declarations.

At the same time, metis has improved the implementation of components:

```rust
...

// Storage
#[metis::component::storage]
pub struct Data<E>
where
    E: Env,
{
    owner: Lazy<Option<E::AccountId>>,
}

// Event trait
pub trait EventEmit<E: Env>: EnvAccess<E> {
    ...
}

// Impl trait
pub trait Impl<E: Env>: Storage<E> + EventEmit<E> {
    // logics
    fn init(&mut self) {
        self.get_mut().set_ownership(&Some(Self::caller()));
    }

    fn renounce_ownership(&mut self) {
        self.ensure_caller_is_owner();

        self.emit_event_ownership_transferred(
            self.get().get_ownership().clone(),
            None);

        self.get_mut().set_ownership(&None);
    }

    ...

    /// Panic if `owner` is not an owner
    fn ensure_owner(&self, owner: &E::AccountId) {
        assert!(&self.get().get_ownership().clone().unwrap() == owner);
    }

    ...
}

```

Such components can extend their functions by inheriting other components, such as an ERC20 component with the function of destroying tokens:

```rust
...

pub trait Impl<E>: erc20::Impl<E>
where
    E: Env,
{
    fn _burn(&mut self, account: &E::AccountId, amount: E::Balance) -> Result<()> {
        ...
    }

    fn burn(&mut self, amount: E::Balance) -> Result<()> {
        self._burn(&Self::caller(), amount)
    }

    fn burn_from(&mut self, account: &E::AccountId, amount: E::Balance) -> Result<()> {
        ...
    }
}
```

Based on metis, we can implement various contract combination modes implemented by Solidity through inheritance under limited intent, and at the same time, with the help of rust's zero-cost abstraction, these abstractions will not bring additional performance consumption.

## 4. Overall Roadmap

Metis for ink! is divided into several milestones:

- **[M1]** Implement basic component macros and components, improve component testing support, developers can build regular DAPPs based on Metis
- **[M2]** Complete component macros, complete component development support, developers can build custom components. Complete the api support corresponding to the metis component.
- **[M3]** Rich component library, complete component and API support for governance and financial mechanism, perfect mathematical library suitable for contract development to support DeFi-type contracts that require complex calculations.

Considering that the current ink! and contract-pallet are still in iteration, some metis features will be implemented based on subsequent improvements, including:

* Contract proxy and upgradeable support will depend on the improvement of subsequent contract calls, by [739](https://github.com/paritytech/ink/issues/739).
* The Event in the component, the Event in the current ink! cannot be independent of the contract, by [759](https://github.com/paritytech/ink/issues/759), the event in the current component is only an early implementation, and it will be refactored based on the improvement of ink! in the future.

With the richness and completeness of the ink! contract community, metis will further implement more public components and libraries to assist developers in developing large-scale contract projects. Therefore, we may arrange [MR] milestones. It will be developed based on the iterative schedule of ink!

* **[MR]** According to the ink!'s iterative progress, community feedback, contract upgrades, contract proxy and cross-contract call support, refactor Event-related implementations, improve basic components and add development assistance macros to reduce duplication while ensuring auditability Code.

## 5. Detailed timeline of M1 (3 developers * 5 weeks)

- Week 1: 
  - M1.1 Design and develop macros that support the development of metis components, and determine the component development paradigm
  - M1.2 Design and develop macros that support the introduction of metis components into contracts, and determine the development paradigm for contract expansion and introduction of components
- Week 2:
  - M1.3 Design and develop unit test support for components
  - M1.4 design and develop integration test support based on Redspot
- Week 3:
  - M1.5 Complete the implementation and testing of Access related components
  - M1.6 Complete the implementation and testing of Security related components
- Week 4:
  - M1.7 Complete the implementation and testing of Token related components
  - M1.8 Complete the detailed Metis component design document
- Week 5:
  - M1.9 Complete documentation and examples of metis components

Cost of M1 (15 developers \* weeks):
* Operating activities: $3000 ( Rent and Devices: $200 per employee \* week )
* Developer payments: $28500 ( $1900 per developer \* week )
* Total Cost: $31500
* Treasury Proposal: 1525 DOT ($20.65/DOT @ 28Jun)

## 6. How to verify M1

Complete the macros and tests related to the metis component, and all the tests can pass. Complete the detailed metis component design document. Complete the implementation and testing of the following contract components, all tests can pass:

- ERC20 and its expansion components (including increasingly issuance, destruction, etc.)
- ERC721 and its expansion components
- ERC777 and its expansion components
- ERC1155 and its expansion components
- Ownable
- AccessControl
- TimelockController
- PullPayment
- ReentrancyGuard
- Pausable

Complete the documentation and examples of the above contract components. 

Patract's treasury proposal about Metis M1 (ink! and Ask! Standard Library)

- MIDLDEV OÜ is a company in Estonia that provides blockchain database snapshots for Polkadot.
- They make new snapshots at least once a day to help node operators and validators.
- A website, polkashots.io, hosts these snapshots along with download links and information.
- The service has been running for 6 months and is the only one of its kind, helping validators recover quickly from issues.
- They plan to request funding from the Polkadot treasury every 6 months to cover their operating costs.
- The total monthly cost for their service is around 1,450 EUR, which includes labor and cloud expenses.
- The proposal will switch to a different snapshot method if new technology is available that works better.
- Payment will be adjusted based on the price of Polkadot on the day of submission.

This treasury proposal is Between the Polkadot Council and MIDLDEV OÜ, a company registered in Estonia with registry number 14973249, commonly known as [MIDL.dev](https://midl.dev/).

# Service description

1.  A functioning infrastructure to provide usable blockchain database snapshots for the Polkadot network, to the benefit of node operators and validators,
    
2.  New snapshots at least once per day. Snapshots are filesystem dump of the Polkadot node storage backend file, of variety RocksDb, of type pruned, with a depth of 1000 blocks, compressed in 7z format, that can be used by validators to quickly spin up or restore their infrastructure,
    
3.  A website frontend at [polkashots.io](https://polkashots.io/) with relevant metadata and download links, including a permanent link that always redirects to the most recent snapshot,
    
4.  Best effort incident and problem management,
    
5.  Redundant implementation setup which allows for continuity, seamless upgrades and basic disaster recovery & contingency management.
    
6.  Make snapshots available on IPFS and pin them for 3 days
    

### Context

The website [polkashots.io](https://polkashots.io/) has been operational for 6 months now and providing Polkadot and Kusama pruned snapshots for validators. It has had excellent uptime. It is currently the only provider for this service. It is very frequently mentioned in the Validator Lounge Matrix channels and there are [youtube videos](https://www.youtube.com/watch?v=UE6GJGvIur8) referencing them. It is beneficial to the ecosystem by providing a path for validators to quickly and safely recover from a storage failure or migrate their operations.

## Evolution over time

Shall substrate/polkadot add support for a useful native snapshot format, the platform will switch to providing these formats instead of a filesystem dump.

Shall substrate/polkadot implement a “warp sync” technology or any other technology, if this technology results in centrally managed snapshot services no longer be the most expedient way of starting or recovering a validator node, this agreement will expire and the service will cease.

## Operational expenses

The labor cost is 1000 EUR/month including 2 engineers in 2 different time zones. The cloud cost varies and is currently estimated at 300 EUR/month.

## Funding request from Polkadot treasury

MIDLDEV OÜ will make funding requests to the Polkadot treasury every 6 months:

-   The first request will cover the period January-June 2021. The future requests will cover post-paid funding of operational expenses, for the previous 6 months.
    
-   Operational expenses consist of labor costs of 1000 EUR/month plus the cloud costs with a 50% markup. Cloud costs include costs of operating the node, storing the files and operating the website frontend.
    
-   We will be operating the polkashots service in a dedicated Google Cloud project (or equivalent in a different cloud provider) for accurate metering and pricing.
    
-   This proposal is for Polkadot, we submitted [an equivalent proposal for the Kusama network](https://kusama.polkassembly.io/treasury/93)
    
## Budget
```
| Cost item                             | Monthly cost             |
|---------------------------------------|--------------------------|
| Labor                                 | 1000 EUR /mo             |
| 150% Cloud costs (estimate)           | 450 EUR /mo              |
| Total (monthly)                       | 1,450.00 EUR /mo         |
| Total (bi-annually)                   | 8,700 EUR bi-anually     |
| Exchange rate DOT/EUR                 | 17.34 EUR (20.666 USD)   |
| Total base price in DOT (bi-annually) | 501.730                  |
| Slippage + conversion fee 5%          | 25.087                   |
| Proposal (DOT)                        | 526.817                  |
```

## Payment conditions

-   to calculate the price, we use Subscan's 30 avg tool at the day of submission:
    

       -   Polkadot: [https://polkadot.subscan.io/tools/charts?type=price](https://polkadot.subscan.io/tools/charts?type=price)
    
     -   Kusama: [https://kusama.subscan.io/tools/charts?type=price](https://kusama.subscan.io/tools/charts?type=price)
    
 
-  Trading-slippage will be taken into account by adding a 5% surplus to the DOT base-price
    
-   Proposal should be approved to cover the upcoming 6 months, not the 6 months of work done before.
    
-   Work will start upon approval.

Polkashots.io maintenance + improvements

- The proposal asks for money from the Polkadot Treasury to help a Chinese non-profit group.
- The group's goal is to create better Chinese content about Polkadot.
- They want to explain complex ideas in a simple way for Chinese users.
- They plan to keep everyone updated on important Polkadot projects.
- The goal is to help more people learn about Polkadot and get involved.
- They are asking for about 1,883.18 DOT for three months to cover costs.
- The funds will help Polkadot grow and succeed in China.

Hi, all councillors:

The proposal aims to seek support from the Polkadot Treasury for the June/July/August operating cost for the Chinese non-profit organization Polkadot Ecology Research Institute, in order to create more original and quality Chinese content, and to relay the otherwise boring technical language to Chinese users in a colloquial way, so that Chinese users can have a real knowledge of Polkadot and increase the breadth of Polkadot in the Chinese market. On the other hand, we will also follow up on the outstanding projects of the Polkadot ecology to keep everyone informed of the latest developments of the Polkadot ecology.

Polkadot's success cannot be separated from the prosperity of the Polkadot Ecological Projects. Our goal is to make more people aware of Polkadot and also to make more people aware of the development of Polkadot ecology, which in turn will lead them to join in the participation and construction of Polkadot ecology, so that Polkadot and Polkadot ecology can flourish.

So this is a proposal for our three months operation cost. We apply approx 1,883.18 DOT total allocation for June, July, August depending on EMA(30) AVG rate (DOT = 22.90 USDT) [here](https://polkadot.subscan.io/tools/charts?type=price) and you can get all details [here](https://docs.google.com/document/d/1njBTICPm8HNAzsmJExZdCCW2GqowrJac0UuMyrphOfw/edit?usp=sharing)

If you have any questions, please give me feedback.

Thanks!

Treasury proposal: The June/July/August operating cost for the nonprofit organization Polkadot Ecology Research Institute

- Subscan is a website that helps people explore and check information on blockchain networks like Polkadot and Kusama.
- They have seen more users using their service since last August.
- However, the increased number of users makes it hard to keep everything running smoothly and costs a lot of money.
- Subscan wants to become financially independent but needs help right now.
- They are asking for financial support from the Polkadot Treasury to improve their services.
- They spent around $18,000 on costs related to Polkadot in a recent time period.
- They are requesting 780 DOT (a type of currency) to help cover these costs.

Subscan is an aggregated Blockchain explorer for Substrate-based chains. We have supported several chains, such as Polkadot, Kusama, and Westend, for more than one year. We have seen an encouraging trend in the number of users and their activeness since last August. However, with the rapid growth of users, stability and reliability in infrastructure are becoming a challenge. We have to pay large bills to ensure the quality of our service.

Subscan is supposed to be a financially independent service in the long run. However, although it is starting to generate some revenue, it still falls short for the time being. Therefore, we wish to get some financial support of the Polkadot Treasury to continue our commitment to the improvement of our service.

Following are some statistics of the current service scale of Subscan.

## Current Service Scale of Subscan

![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/infrastructure-costs-2021-march-to-may/subscan-cloudflare.png)

![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/infrastructure-costs-2021-march-to-may/subscan-qps-per-network.png)

We can see from the charts that Polkadot accounts for the absolute majority of all requests by Subscan.

## Billing Info

The infrastructure cost refers to what we spent on Subscan for Polkadot Network (<https://polkadot.subscan.io/>) on the Google Cloud Platform. Following are the rounded figures for the past three months (March to May 2021).

March 2021:  $6593.67

April 2021: $6524.53

May 2021: $7668.53

**Subtotal: $20786.73**


![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/infrastructure-costs-2021-march-to-may/cost-table-march.png)

![](https://media.githubusercontent.com/media/itering/subscan-treasury-proposals/master/infrastructure-costs-2021-march-to-may/cost-table-april.png)

![](https://github.com/itering/subscan-treasury-proposals/raw/master/infrastructure-costs-2021-march-to-may/cost-table-may.png)

*Compute Engine*, *Stackdriver Logging*, and *Cloud SQL* are the three primary services, among which *Compute Engine* alone constitutes around 80% of the total cost. Detailed billing info and other relevant proof are available in private upon request.

**The estimated infrastructure cost we spent on Polkadot adds up to $18,000. Therefore, the amount we are requesting is 780 DOT (1 DOT ≈ 23 $USD). Such support is indispensable for our goal to capitalize on economies of scale.**

## References

- Subscan for Polkadot Network: <https://polkadot.subscan.io/>
- Subscan Service Status: <https://subscan.statuspage.io/>



> The source code of this proposal is hosted on [GitHub](https://github.com/itering/subscan-treasury-proposals/blob/master/infrastructure-costs-2021-march-to-may/polkadot.md).

The Infrastructure Costs of Subscan for Polkadot Network from March 2021 to May 2021

- Polkassembly is important for the Polkadot and Kusama networks.
- A proposal is being made for money to cover costs every three months.
- The money will help pay for maintenance, upgrades, and other expenses.
- The proposal will share costs for July, August, and September 2021.
- Funds are requested from the Polkadot treasury.
- The proposal will alternate between Kusama and Polkadot every three months.
- Links are provided to view the full proposal and discussions.

[Polkassembly](https://polkadot.polkassembly.io/) is an integral part of polkadot and kusama governance. This submission proposes a recurring payment (quarterly) to cover maintenance, operations and human resource costs for Polkassembly, including general maintenance, runtime upgrades changes and could/infrastructure cost. Since Polkassembly supports both Kusama and Polkadot Networks, this maintenance proposal will alternate networks for submission every three months. This submission covers costs for July, August, September of 2021. We are requesting the Polkadot treasury to provide funds this time.

The full proposal is available [here](https://docs.google.com/document/d/1iyV_F6L9FjGx6gAf8EdTDFsENGqWhpfqYYFYTRZNXHo/edit?usp=sharing). Disussion can be found [here](https://polkadot.polkassembly.io/post/484)

Social Contract between Polkassembly and Polkadot Treasury

- **Proponent:** Figment  
- **Date:** June 8, 2021  
- **Requested DOTs:** 1,300 DOTs  
- **Purpose:** To grow the Polkadot developer ecosystem.  
- **Platforms:** Figment Learn (education) and DataHub (infrastructure).  
- **Goal:** Help developers learn Web 3 and build apps for free.  
- **Incentives:** All DOTs go to developers; Figment keeps 0 DOTs.

**Proponent:** 142hWpBmGsePS1tSopxg4JWaRirGgVpZubz5h251m31KJXdf

**Date:** 06/08/21

**Requested DOT:** 1,300 DOTs for Milestones 5 - 100% of the DOTs will be distributed to developers as incentives. Figment retains 0 DOTs for operational costs as part of this proposal.

**Short description:** Figment is creating a proposal to request DOTs to be used as incentives to grow the Polkadot developer ecosystem via its platforms Figment Learn and DataHub. Learn is the education and onboarding platform for developers interested in Web 3 development. With Learn, developers gain access to the most comprehensive developer portal which standardizes documentation across networks and offers in-depth practical tutorials to help them get to the next level.

Tutorials can be completed seamlessly with DataHub which provides easy access to the protocols via our highly available full node infrastructure and suite of middleware. Developers then get to build and scale their DApps for free using the DataHub infrastructure.

**Original proposal doc:**

**[Visit this link for the full proposal](https://docs.google.com/document/d/1GkgnwLhjVCCrKY43uRgzg6vFI6yN_aoD_TCxBdkNAg8/edit#l)**

Figment Treasury Proposal: Figment Learn & DataHub Milestone 5

- Polkadot Ecology Research Institute is a nonprofit group in China. 
- They have written 16 articles about Polkadot that many people have read.
- They want help from the national treasury for their work.
- With the support, they plan to create more good content about Polkadot.
- They also want to reach more people through different media.
- More information about their proposal is available in a document.
- They welcome any questions or feedback from councillors.

Hi, all councillors:

Polkadot Ecology Research Institute is a nonprofit organization in China [which has produced 16 professional articles of Polkadot with over three million pageviews](https://docs.google.com/spreadsheets/d/1eNXFc0QS-EHTZemMGnLb0pvju665T5h-KJrbs-XSQFY/edit?usp=sharing).

We hope to obtain the support of the national treasury so that we can continue to output high-quality content about Polkadot, expand more media channels, and let more people understand all aspects of Polkadot.

You can get more details about proposal [here](https://docs.google.com/document/d/1muYtZp_qnQFWuzkiUEHCAc8zKCYHyZEcAly65bqCPfs/edit?usp=sharing).

If you have any questions, please give me feedback.

Thanks!

Treasury proposal: The April operating cost for the nonprofit organization Polkadot Ecology Research Institute

- Patract Labs created the Patract Open Platform to help with Wasm contract technology in Polkadot.
- Many projects, like Europa, are using this platform for development.
- Europa is a testing environment for running special contracts called Pallet-Contracts.
- Europa enables developers to debug their code and offers useful tools for contract development.
- The future plan for Europa includes making it easier to use and adding a new user interface.
- Europa will show more information about how contracts run and their connections with other accounts and actions.
- It will also package everything together to help developers set it up without trouble.
- The team plans to finish updates for Europa by June 17.

This is copy from [https://polkadot.polkassembly.io/post/410](https://polkadot.polkassembly.io/post/410)

[Patract Labs](https://patract.io) started Patract Open Platform to promote Wasm contract technology in the Polkadot community. At present, dozens of parachain and DApp projects have joined, and [Europa](github.com/patractlabs/europa) has also been widely used in the community. 4 months ago we applied   [treasury proposal #27](https://polkadot.polkassembly.io/treasury/27) for Europa v0.2, and 3 months ago we wrote a [development report #250](https://polkadot.polkassembly.io/post/250). In the past 3 months, we have also followed up with the updates of `Pallet-Contracts` and `ink!`.

Europa is a sandbox environment for running `Pallet-Contracts`. Contract developers can use the executable files compiled by Europa to debug `ink!` contracts. Europa is also a framework that provides a sandbox environment for Substrate Runtime. Parachain developers can implement a sandbox environment for their specific Runtime.

Europa provides minimal service components that support Runtime to package and execute extrinsics normally. Therefore, although Europa can be regarded as a node, this node does not have a consensus system, no network connection, and only retains the Runtime executor, RPC and some other necessary services. In addition, as a sandbox for Wasm contract operation, we modified `Pallet-Contracts` to provide more detailed debugging information, including contract execution information (information in `Pallet-Contracts`) and Wasm execution information. In order to facilitate debugging and add new features, Europa removed all Wasm components in Substrate, so any `std` code can be added to the entire system of Europa to meet experimental requirements.

## Europa's future plan

* v0.1(finished): Have an independent runtime environment to facilitate more subsequent expansion directions.

* v0.2(finished): Modify at contract module level to provide more information。

* v0.3: Improve the developement experience, strengthen collaboration with other tools, and extend the sandbox to be compatible with other runtime modules。

The original v0.3 plan about expanding Europa's compatibility with other Runtime modules has been completed in v0.1, so the focus of now work in v0.3 is to improve Europa's usablity, which is mainly divided into the following two parts:

1. We plan to design the UI interface for Europa and implement the following product functions:

   Currently, the only UI interface that can directly operate Europa is the Polkadot apps, but apps are for chain operations rather than contract operations. We expect to show more information and elements for the wasm contracts, and improve the contract interaction experience.

   1. Strengthen the functions related to the contract execution system in the contract UI section:
      1. Visualization of contract execution process information: The current important information about contract execution in Europa is directly printed to the log. Developers need to spend a lot of effort to filter out the required information in the log. Therefore, Europa will display it visually and provide some indexing functions;
      2. The relationship between the contract and related extrinsics and events: for example, when you click on the contract address, you can list the contract extrinsics related to this contract; when you click on an account address, you can list all the related extrinsics of this account, etc., this feature can assist developers in the relationship between related extrinsics, accounts and contracts;
      3. Scan all the contracts in the current Europa storage and build the relationship;
      4. Link with a Redspot project in Europa, scan the account and executed extrinsics in the Redspot configuration file, and build the relationship between contracts, accounts, and extrinsics.
   2. Provide the interface and UI to operate Europa's special RPC functions and display state changes. Europa has some special functions for the sandbox environment. Currently, it can only be executed or displayed through RPC calls, such as backward of block height, forward of block height, state execution changes, etc. Operating these functions through the UI interface lowers the threshold for users.
   3. Combined with Europa's workspace function, you can create and select different workspaces through the UI interface.

1. Similar to Ganache, Europa and UI will be made into binary packages for different platforms for distribution

   Although Europa is open source, there will be a lot of trouble if you directly use the source code to compile on a different platform (such as Windows). Moreover, the compilation process is time-consuming and requires resources. Therefore, we will package Europa together with the UI into a binary executable file for distribution. Contract developers can download and execute the packaged Europa binary file directly, so that contract developers can run the node directly without worrying about how to set up the environment for running the contract. .

## Detailed design of v0.3

### 1. The UI Interface

#### 1.1. Visualization of contract execution process

In v0.2, the execution information of the contract in Europa will only be displayed in the log, and the structure is as follows:

```text
1: NestedRuntime {
    ext_result: [success] ExecReturnValue { flags: 0, data:  },
    caller: d43593c715fdd31c61141abd04a99fd68...(5GrwvaEF...),
    self_account: 0144d6fc570d7bddda6f8e3614...(5C6NMXaS...),
    selector: 0x9bae9d5e,
    args: 0x40420f00000000000000000000000000,
    value: 10000000000000000,
    gas_limit: 200000000000,
    gas_left: 190018947968,
    env_trace: [
        seal_input(Some(0x9bae9d5e40420f00000000000000000000000000)),
       ...
    ],
    sandbox_result_ok: Value(I32(0,),),
    nest: [],
}
```

Europa UI needs to interpret and reorganize the information implemented by Europa in v0.2. Therefore, the implementation details of this development are as follows:

1. Europa: In this version, the information needs to be associated with the extrinsic and stored in the Europa database developed by v0.1, and provide RPC for the outside to call.
2. Europa UI: Return contract execution information by calling RPC with tx hash, analyze and draw it into Europa UI in a visual form . **you can see all the [15 prototype diagrams](https://modao.cc/app/c8a2d9ec53de7ccaf412fe7caf6275ec151ab9ed)**

The visualization of the contract execution process information is the most complicated part of the v0.3 product. **The focus of this part is to convert the intuitionally difficult or even unreadable information originally provided by Europa into visualized information combined with the matadata information of the contract, providing developers with an intuitive display of the contract execution process**.

One of the detailed prototype diagram is

![](https://user-images.githubusercontent.com/44688313/115189910-d41f2f80-a119-11eb-8303-e2e0cc0fe267.png)

Contract execution is associated with a extrinsic, which is divided into details and states. Details clearly shows the contract execution details originally in the log, and states shows the state changes involved in this extrinsic.

The top data is the overall data of the entire extrinsic, including the hash, result, block, timestamp, gas limit, gas used, extrinsic fee of the entire extrinsic, each box below represents a call, and boxes with different colors and indents represent calls For different levels, the same depth of call uses arrows of the same color. More complex details are displayed through the drop-down box of more details.

Therefore, the important meaning of this prototype diagram is to show that the "calling relationship of the contract (including the cross-contract call process)" can visually show this process, and developers can only obtain relevant information by analyzing the relationship in the log of Europa in v0.2.

The meaning of the text in the diagram is as follows:

* Result: ext_result in the output of nestedRuntime. A green check is displayed for success, and a red cross is displayed for failure.
* Block: the block that the extrinsic is in 
* TimeStamp: The timestamp of the block
* From: extrinsic caller
* To: extrinsic recipient
* value: the token sent by the extrinsic
* extrinsic fee: extrinsic fee, based on the token of the chain
* Gas Limit: The maximum gas that the extrinsic can consume
* Gas used: The actual gas consumed by each call, followed by a percentage that occupies the limit
* more details: This part is the details of each layer of contract calls, and contains more important information.

Take the above picture as an example, the a81ac user calls the contract c650f, which is call 1. In the contract c650f, there are two more contracts called call 2 and call 3. The call depth of these two contracts is the same, so the same color arrow is used to display. Each call has a corresponding consumed gas and remaining gas. In the picture, call 2 consumes 2139256707 gas, and the remaining gas is 397860743293.

After clicking "more details":

The correct execution is as follows:

![](https://user-images.githubusercontent.com/44688313/115189966-eb5e1d00-a119-11eb-8b64-4e8663138a6b.png)

This part includes

* Function: Function selector
* Args: The parameters of the calling function.
* trap reason: the reason for the end of this execution
* env trace: host_function called during the execution of this contract

After the user uploads the ABI of the contract, he can click the "Decode parameters" button to analyze the functions and parameters called by the contract.
![](https://user-images.githubusercontent.com/44688313/115190258-5871b280-a11a-11eb-9fbd-866db9c72dc1.png)

When the Wasm contract executes panic, a Wasm execution call stack (backtrace) message will appear:

![](https://user-images.githubusercontent.com/44688313/115190363-7c34f880-a11a-11eb-862d-229628cff6ae.png)

#### 1.2. The association between the contract, related extrinsics, events, accounts, and Redspot

The realization of this function requires Europa to be able to index extrinsics. At present, Substrate provides the function of index extrinsic by hash, which is basically about to be developed. Therefore, Europa first needs to transplant this function to the Europa framework to provide the function of index extrinsic.

Europa UI needs to write related code. After each startup, scan the block data under the current workspace from block height 0 to build the index relationship between contracts, extrinsics, and accounts.

For the association of Redspot, the corresponding interface needs to be provided on the UI, and the corresponding configuration of Redspot is parsed after the call. (Similar to the association between Ganache and Truffle)

Take the display of the contract address in Explorer as an example.

![](https://user-images.githubusercontent.com/44688313/115190442-98d13080-a11a-11eb-9ddc-635330a3f3de.png)
![](https://user-images.githubusercontent.com/44688313/115190483-aab2d380-a11a-11eb-977b-b853e74755f1.png)

This interface not only displays the creator of the contract and the created extrinsic, but also allows the user to upload the contract ABI and directly call the related functions of the contract on this interface. At the same time, since the extrinsics sub-page lists all the related extrinsics of the contract, after the call is completed, the user can directly view the execution status of the call extrinsic initiated by the user under the sub-page, and retrieve the execution status of the historical extrinsic at any time.

#### 1.3. Europa's special founction RPC

Europa's backward of block height, and the forward of block height. These two RPCs can currently only be called directly from the outside. So this time in Europa UI, we will combine this feature with the operability of the UI.

Take the Forks interface display in apps as an example:

![](https://user-images.githubusercontent.com/44688313/115190540-c28a5780-a11a-11eb-973f-19e43850d2c6.png)

When the user wants to return to the 4455515 block, he only needs to click on the block to send a request to Europa, Europa will execute the backward logic to this block, and the block information displayed on the UI will also be returned to the block.

When the user wants to forward to a higher block, there will be an input box on the UI interface. After the user enters, Europa can forward the block to the specified height.

#### 1.4. Europa's display of state change

The current state change information of Europa only records changes in blocks (because it is directly related to StorageOverlay), and does not record Subtrie changes.

Therefore, Europa UI needs to display the status changes of the current extrinsic execution on the interface, and Europa needs to continue to develop the following 2 functions:

1. Europa refines the information of the state changes as a unit of extrinsic, and records it.
2. Europa needs to store the state changes of Subtrie.

After the development of these two functions, the UI can develop the corresponding interface for the corresponding function. In this version, only state changes similar to the hex format in Etherscan will be displayed. In future versions, we will try to display the real data after analyzing the metadata.

#### 1.5. Europa's function of workspace

This part is similar to Ganache and provides an interface for creating and managing workspace in the UI. The main logic is to call the Europa and workspace-related command interfaces in the UI and switch the Europa workspace. Under the management of workspace, different spaces can be stored and switched under the same path.

### 2. Europa's binary package

Similar to Ganache, in this version Europa will be distributed together with UI into binary packages for different platforms. To make binary, we use Electron to package Europa node and UI together. Therefore, this part needs to implement the following functions:

1. Introduce Electron to package Europa node and UI
2. Solve the problem of node compilation on multiple platforms, macOS, Windows and Linux.
3. Produce CI's long-term support for the compilation and packaging of Electron's multi-platform nodes.

The difficulty in this part is to solve the compatibility problem between different platforms. After the completion of this part, Windows users will greatly reduce the difficulty of configuring the environment in the process of constructing the contract development environment and lower the threshold for contract developers.

## Detailed timeline of v0.3 (May 6 - Jun 17)

Europa is divided into the following two parts in this proposal:

- Europa Node: refers to the node part of Europa, that is, the content in the original [Europa](https://github.com/patractlabs/europa) repository;
- Europa UI: refers to the interface part of Europa in this version. Europa-UI repository may be created or merged into the original Europa repository.

Therefore, the plan for this development is as follows:

1. **Week1-2: Refactor part of the code in Europa Node and design the corresponding interface for Europa UI. (3 developers * 2 weeks)***

* Update Europa and track to the latest Substrate version, and transplant related functions of extrisic indexing;

* Persist contract execution information (Contract trace, the log information of NestedRuntime above) and provide corresponding RPC to obtain this information;

* Refactor the storage module of state change information, associate the state change information with the extrisic hash, persist the data and provide the corresponding RPC;

* Support storage and access to Subtrie's state change information.

2. **Week3-5: Build Europa UI. (3 developers * 3 weeks + 1 designer * 1 week)**

* Europa UI framework;

* Index the storage of Europa Node, and construct the relationship between accounts, extrinsics, and contracts, and make corresponding persistence;

* Construct a visualization module of contract execution process information, and analyze the corresponding data obtained from Europa Node according to the contract Metadata information;

* Build extrinsic, block, event, and detailed information interface of each part;

* Associate each part with the RPC, storage and other parts provided by Europa Node.

3. **Week6: Integrate and test, build the CI of Europa UI binary package, and release the binary. (3 developers * 1 week)**

##  Cost of v0.3 (1 designer * week + 18 developers * weeks)

- Operating activities: $3800 ( Rent and Devices: $200 per developer * week )
- Employee payments: $35700 ($1500/$1900 per designer/developer * week)
- Total Cost: $39500 and EMA30 price: $36.2 / DOT
- Treasury Proposal: 1091 DOT

## Verification

1. Directly download the binary packages of Windows, macOS and Ubuntu from [Europa Release](https://github.com/patractlabs/europa/releases), which can be run directly on the corresponding platform.
2. After deploying any contract through Europa and calling it through a extrinsic, the functions planned in the prototype diagram are presented:
   1. In the associated account, you can click to jump between extrinsics and contracts. For example, click on an account to list the contracts deployed under this account and initiate invocation extrinsics, and click on the corresponding extrinsic or contract to jump to the corresponding detailed interface;
   2. Click on a extrinsic that deploys or invokes a contract, and the detailed information of the contract execution will be listed in a visual form; click on the state interface of the extrinsic, and the state information changed during the execution of the extrinsic will be listed;
   3. On the main page displaying block information, you can click on a block and roll back to that block, or enter a block height to forward the height of the Europa block to that block;
3. You can create and switch between different workspaces through the workspace interface;
4. After Europa is closed and restarted, the relationship between accounts, extrinsics and contracts before closing will be reconstructed based on the information in Europa's workspace.

Treasury Proposals