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Dragonchain Great Reddit Scaling Bake-Off Public Proposal

Dragonchain Great Reddit Scaling Bake-Off Public Proposal

Dragonchain Public Proposal TL;DR:

Dragonchain has demonstrated twice Reddit’s entire total daily volume (votes, comments, and posts per Reddit 2019 Year in Review) in a 24-hour demo on an operational network. Every single transaction on Dragonchain is decentralized immediately through 5 levels of Dragon Net, and then secured with combined proof on Bitcoin, Ethereum, Ethereum Classic, and Binance Chain, via Interchain. At the time, in January 2020, the entire cost of the demo was approximately $25K on a single system (transaction fees locked at $0.0001/txn). With current fees (lowest fee $0.0000025/txn), this would cost as little as $625.
Watch Joe walk through the entire proposal and answer questions on YouTube.
This proposal is also available on the Dragonchain blog.

Hello Reddit and Ethereum community!

I’m Joe Roets, Founder & CEO of Dragonchain. When the team and I first heard about The Great Reddit Scaling Bake-Off we were intrigued. We believe we have the solutions Reddit seeks for its community points system and we have them at scale.
For your consideration, we have submitted our proposal below. The team at Dragonchain and I welcome and look forward to your technical questions, philosophical feedback, and fair criticism, to build a scaling solution for Reddit that will empower its users. Because our architecture is unlike other blockchain platforms out there today, we expect to receive many questions while people try to grasp our project. I will answer all questions here in this thread on Reddit, and I've answered some questions in the stream on YouTube.
We have seen good discussions so far in the competition. We hope that Reddit’s scaling solution will emerge from The Great Reddit Scaling Bake-Off and that Reddit will have great success with the implementation.

Executive summary

Dragonchain is a robust open source hybrid blockchain platform that has proven to withstand the passing of time since our inception in 2014. We have continued to evolve to harness the scalability of private nodes, yet take full advantage of the security of public decentralized networks, like Ethereum. We have a live, operational, and fully functional Interchain network integrating Bitcoin, Ethereum, Ethereum Classic, and ~700 independent Dragonchain nodes. Every transaction is secured to Ethereum, Bitcoin, and Ethereum Classic. Transactions are immediately usable on chain, and the first decentralization is seen within 20 seconds on Dragon Net. Security increases further to public networks ETH, BTC, and ETC within 10 minutes to 2 hours. Smart contracts can be written in any executable language, offering full freedom to existing developers. We invite any developer to watch the demo, play with our SDK’s, review open source code, and to help us move forward. Dragonchain specializes in scalable loyalty & rewards solutions and has built a decentralized social network on chain, with very affordable transaction costs. This experience can be combined with the insights Reddit and the Ethereum community have gained in the past couple of months to roll out the solution at a rapid pace.

Response and PoC

In The Great Reddit Scaling Bake-Off post, Reddit has asked for a series of demonstrations, requirements, and other considerations. In this section, we will attempt to answer all of these requests.

Live Demo

A live proof of concept showing hundreds of thousands of transactions
On Jan 7, 2020, Dragonchain hosted a 24-hour live demonstration during which a quarter of a billion (250 million+) transactions executed fully on an operational network. Every single transaction on Dragonchain is decentralized immediately through 5 levels of Dragon Net, and then secured with combined proof on Bitcoin, Ethereum, Ethereum Classic, and Binance Chain, via Interchain. This means that every single transaction is secured by, and traceable to these networks. An attack on this system would require a simultaneous attack on all of the Interchained networks.
24 hours in 4 minutes (YouTube):
24 hours in 4 minutes
The demonstration was of a single business system, and any user is able to scale this further, by running multiple systems simultaneously. Our goals for the event were to demonstrate a consistent capacity greater than that of Visa over an extended time period.
Tooling to reproduce our demo is available here:
https://github.com/dragonchain/spirit-bomb

Source Code

Source code (for on & off-chain components as well tooling used for the PoC). The source code does not have to be shared publicly, but if Reddit decides to use a particular solution it will need to be shared with Reddit at some point.

Scaling

How it works & scales

Architectural Scaling

Dragonchain’s architecture attacks the scalability issue from multiple angles. Dragonchain is a hybrid blockchain platform, wherein every transaction is protected on a business node to the requirements of that business or purpose. A business node may be held completely private or may be exposed or replicated to any level of exposure desired.
Every node has its own blockchain and is independently scalable. Dragonchain established Context Based Verification as its consensus model. Every transaction is immediately usable on a trust basis, and in time is provable to an increasing level of decentralized consensus. A transaction will have a level of decentralization to independently owned and deployed Dragonchain nodes (~700 nodes) within seconds, and full decentralization to BTC and ETH within minutes or hours. Level 5 nodes (Interchain nodes) function to secure all transactions to public or otherwise external chains such as Bitcoin and Ethereum. These nodes scale the system by aggregating multiple blocks into a single Interchain transaction on a cadence. This timing is configurable based upon average fees for each respective chain. For detailed information about Dragonchain’s architecture, and Context Based Verification, please refer to the Dragonchain Architecture Document.

Economic Scaling

An interesting feature of Dragonchain’s network consensus is its economics and scarcity model. Since Dragon Net nodes (L2-L4) are independent staking nodes, deployment to cloud platforms would allow any of these nodes to scale to take on a large percentage of the verification work. This is great for scalability, but not good for the economy, because there is no scarcity, and pricing would develop a downward spiral and result in fewer verification nodes. For this reason, Dragonchain uses TIME as scarcity.
TIME is calculated as the number of Dragons held, multiplied by the number of days held. TIME influences the user’s access to features within the Dragonchain ecosystem. It takes into account both the Dragon balance and length of time each Dragon is held. TIME is staked by users against every verification node and dictates how much of the transaction fees are awarded to each participating node for every block.
TIME also dictates the transaction fee itself for the business node. TIME is staked against a business node to set a deterministic transaction fee level (see transaction fee table below in Cost section). This is very interesting in a discussion about scaling because it guarantees independence for business implementation. No matter how much traffic appears on the entire network, a business is guaranteed to not see an increased transaction fee rate.

Scaled Deployment

Dragonchain uses Docker and Kubernetes to allow the use of best practices traditional system scaling. Dragonchain offers managed nodes with an easy to use web based console interface. The user may also deploy a Dragonchain node within their own datacenter or favorite cloud platform. Users have deployed Dragonchain nodes on-prem on Amazon AWS, Google Cloud, MS Azure, and other hosting platforms around the world. Any executable code, anything you can write, can be written into a smart contract. This flexibility is what allows us to say that developers with no blockchain experience can use any code language to access the benefits of blockchain. Customers have used NodeJS, Python, Java, and even BASH shell script to write smart contracts on Dragonchain.
With Docker containers, we achieve better separation of concerns, faster deployment, higher reliability, and lower response times.
We chose Kubernetes for its self-healing features, ability to run multiple services on one server, and its large and thriving development community. It is resilient, scalable, and automated. OpenFaaS allows us to package smart contracts as Docker images for easy deployment.
Contract deployment time is now bounded only by the size of the Docker image being deployed but remains fast even for reasonably large images. We also take advantage of Docker’s flexibility and its ability to support any language that can run on x86 architecture. Any image, public or private, can be run as a smart contract using Dragonchain.

Flexibility in Scaling

Dragonchain’s architecture considers interoperability and integration as key features. From inception, we had a goal to increase adoption via integration with real business use cases and traditional systems.
We envision the ability for Reddit, in the future, to be able to integrate alternate content storage platforms or other financial services along with the token.
  • LBRY - To allow users to deploy content natively to LBRY
  • MakerDAO to allow users to lend small amounts backed by their Reddit community points.
  • STORJ/SIA to allow decentralized on chain storage of portions of content. These integrations or any other are relatively easy to integrate on Dragonchain with an Interchain implementation.

Cost

Cost estimates (on-chain and off-chain) For the purpose of this proposal, we assume that all transactions are on chain (posts, replies, and votes).
On the Dragonchain network, transaction costs are deterministic/predictable. By staking TIME on the business node (as described above) Reddit can reduce transaction costs to as low as $0.0000025 per transaction.
Dragonchain Fees Table

Getting Started

How to run it
Building on Dragonchain is simple and requires no blockchain experience. Spin up a business node (L1) in our managed environment (AWS), run it in your own cloud environment, or on-prem in your own datacenter. Clear documentation will walk you through the steps of spinning up your first Dragonchain Level 1 Business node.
Getting started is easy...
  1. Download Dragonchain’s dctl
  2. Input three commands into a terminal
  3. Build an image
  4. Run it
More information can be found in our Get started documents.

Architecture
Dragonchain is an open source hybrid platform. Through Dragon Net, each chain combines the power of a public blockchain (like Ethereum) with the privacy of a private blockchain.
Dragonchain organizes its network into five separate levels. A Level 1, or business node, is a totally private blockchain only accessible through the use of public/private keypairs. All business logic, including smart contracts, can be executed on this node directly and added to the chain.
After creating a block, the Level 1 business node broadcasts a version stripped of sensitive private data to Dragon Net. Three Level 2 Validating nodes validate the transaction based on guidelines determined from the business. A Level 3 Diversity node checks that the level 2 nodes are from a diverse array of locations. A Level 4 Notary node, hosted by a KYC partner, then signs the validation record received from the Level 3 node. The transaction hash is ledgered to the Level 5 public chain to take advantage of the hash power of massive public networks.
Dragon Net can be thought of as a “blockchain of blockchains”, where every level is a complete private blockchain. Because an L1 can send to multiple nodes on a single level, proof of existence is distributed among many places in the network. Eventually, proof of existence reaches level 5 and is published on a public network.

API Documentation

APIs (on chain & off)

SDK Source

Nobody’s Perfect

Known issues or tradeoffs
  • Dragonchain is open source and even though the platform is easy enough for developers to code in any language they are comfortable with, we do not have so large a developer community as Ethereum. We would like to see the Ethereum developer community (and any other communities) become familiar with our SDK’s, our solutions, and our platform, to unlock the full potential of our Ethereum Interchain. Long ago we decided to prioritize both Bitcoin and Ethereum Interchains. We envision an ecosystem that encompasses different projects to give developers the ability to take full advantage of all the opportunities blockchain offers to create decentralized solutions not only for Reddit but for all of our current platforms and systems. We believe that together we will take the adoption of blockchain further. We currently have additional Interchain with Ethereum Classic. We look forward to Interchain with other blockchains in the future. We invite all blockchains projects who believe in decentralization and security to Interchain with Dragonchain.
  • While we only have 700 nodes compared to 8,000 Ethereum and 10,000 Bitcoin nodes. We harness those 18,000 nodes to scale to extremely high levels of security. See Dragonchain metrics.
  • Some may consider the centralization of Dragonchain’s business nodes as an issue at first glance, however, the model is by design to protect business data. We do not consider this a drawback as these nodes can make any, none, or all data public. Depending upon the implementation, every subreddit could have control of its own business node, for potential business and enterprise offerings, bringing new alternative revenue streams to Reddit.

Costs and resources

Summary of cost & resource information for both on-chain & off-chain components used in the PoC, as well as cost & resource estimates for further scaling. If your PoC is not on mainnet, make note of any mainnet caveats (such as congestion issues).
Every transaction on the PoC system had a transaction fee of $0.0001 (one-hundredth of a cent USD). At 256MM transactions, the demo cost $25,600. With current operational fees, the same demonstration would cost $640 USD.
For the demonstration, to achieve throughput to mimic a worldwide payments network, we modeled several clients in AWS and 4-5 business nodes to handle the traffic. The business nodes were tuned to handle higher throughput by adjusting memory and machine footprint on AWS. This flexibility is valuable to implementing a system such as envisioned by Reddit. Given that Reddit’s daily traffic (posts, replies, and votes) is less than half that of our demo, we would expect that the entire Reddit system could be handled on 2-5 business nodes using right-sized containers on AWS or similar environments.
Verification was accomplished on the operational Dragon Net network with over 700 independently owned verification nodes running around the world at no cost to the business other than paid transaction fees.

Requirements

Scaling

This PoC should scale to the numbers below with minimal costs (both on & off-chain). There should also be a clear path to supporting hundreds of millions of users.
Over a 5 day period, your scaling PoC should be able to handle:
*100,000 point claims (minting & distributing points) *25,000 subscriptions *75,000 one-off points burning *100,000 transfers
During Dragonchain’s 24 hour demo, the above required numbers were reached within the first few minutes.
Reddit’s total activity is 9000% more than Ethereum’s total transaction level. Even if you do not include votes, it is still 700% more than Ethereum’s current volume. Dragonchain has demonstrated that it can handle 250 million transactions a day, and it’s architecture allows for multiple systems to work at that level simultaneously. In our PoC, we demonstrate double the full capacity of Reddit, and every transaction was proven all the way to Bitcoin and Ethereum.
Reddit Scaling on Ethereum

Decentralization

Solutions should not depend on any single third-party provider. We prefer solutions that do not depend on specific entities such as Reddit or another provider, and solutions with no single point of control or failure in off-chain components but recognize there are numerous trade-offs to consider
Dragonchain’s architecture calls for a hybrid approach. Private business nodes hold the sensitive data while the validation and verification of transactions for the business are decentralized within seconds and secured to public blockchains within 10 minutes to 2 hours. Nodes could potentially be controlled by owners of individual subreddits for more organic decentralization.
  • Billing is currently centralized - there is a path to federation and decentralization of a scaled billing solution.
  • Operational multi-cloud
  • Operational on-premises capabilities
  • Operational deployment to any datacenter
  • Over 700 independent Community Verification Nodes with proof of ownership
  • Operational Interchain (Interoperable to Bitcoin, Ethereum, and Ethereum Classic, open to more)

Usability Scaling solutions should have a simple end user experience.

Users shouldn't have to maintain any extra state/proofs, regularly monitor activity, keep track of extra keys, or sign anything other than their normal transactions
Dragonchain and its customers have demonstrated extraordinary usability as a feature in many applications, where users do not need to know that the system is backed by a live blockchain. Lyceum is one of these examples, where the progress of academy courses is being tracked, and successful completion of courses is rewarded with certificates on chain. Our @Save_The_Tweet bot is popular on Twitter. When used with one of the following hashtags - #please, #blockchain, #ThankYou, or #eternalize the tweet is saved through Eternal to multiple blockchains. A proof report is available for future reference. Other examples in use are DEN, our decentralized social media platform, and our console, where users can track their node rewards, view their TIME, and operate a business node.
Examples:

Transactions complete in a reasonable amount of time (seconds or minutes, not hours or days)
All transactions are immediately usable on chain by the system. A transaction begins the path to decentralization at the conclusion of a 5-second block when it gets distributed across 5 separate community run nodes. Full decentralization occurs within 10 minutes to 2 hours depending on which interchain (Bitcoin, Ethereum, or Ethereum Classic) the transaction hits first. Within approximately 2 hours, the combined hash power of all interchained blockchains secures the transaction.

Free to use for end users (no gas fees, or fixed/minimal fees that Reddit can pay on their behalf)
With transaction pricing as low as $0.0000025 per transaction, it may be considered reasonable for Reddit to cover transaction fees for users.
All of Reddit's Transactions on Blockchain (month)
Community points can be earned by users and distributed directly to their Reddit account in batch (as per Reddit minting plan), and allow users to withdraw rewards to their Ethereum wallet whenever they wish. Withdrawal fees can be paid by either user or Reddit. This model has been operating inside the Dragonchain system since 2018, and many security and financial compliance features can be optionally added. We feel that this capability greatly enhances user experience because it is seamless to a regular user without cryptocurrency experience, yet flexible to a tech savvy user. With regard to currency or token transactions, these would occur on the Reddit network, verified to BTC and ETH. These transactions would incur the $0.0000025 transaction fee. To estimate this fee we use the monthly active Reddit users statista with a 60% adoption rate and an estimated 10 transactions per month average resulting in an approximate $720 cost across the system. Reddit could feasibly incur all associated internal network charges (mining/minting, transfer, burn) as these are very low and controllable fees.
Reddit Internal Token Transaction Fees

Reddit Ethereum Token Transaction Fees
When we consider further the Ethereum fees that might be incurred, we have a few choices for a solution.
  1. Offload all Ethereum transaction fees (user withdrawals) to interested users as they wish to withdraw tokens for external use or sale.
  2. Cover Ethereum transaction fees by aggregating them on a timed schedule. Users would request withdrawal (from Reddit or individual subreddits), and they would be transacted on the Ethereum network every hour (or some other schedule).
  3. In a combination of the above, customers could cover aggregated fees.
  4. Integrate with alternate Ethereum roll up solutions or other proposals to aggregate minting and distribution transactions onto Ethereum.

Bonus Points

Users should be able to view their balances & transactions via a blockchain explorer-style interface
From interfaces for users who have no knowledge of blockchain technology to users who are well versed in blockchain terms such as those present in a typical block explorer, a system powered by Dragonchain has flexibility on how to provide balances and transaction data to users. Transactions can be made viewable in an Eternal Proof Report, which displays raw data along with TIME staking information and traceability all the way to Bitcoin, Ethereum, and every other Interchained network. The report shows fields such as transaction ID, timestamp, block ID, multiple verifications, and Interchain proof. See example here.
Node payouts within the Dragonchain console are listed in chronological order and can be further seen in either Dragons or USD. See example here.
In our social media platform, Dragon Den, users can see, in real-time, their NRG and MTR balances. See example here.
A new influencer app powered by Dragonchain, Raiinmaker, breaks down data into a user friendly interface that shows coin portfolio, redeemed rewards, and social scores per campaign. See example here.

Exiting is fast & simple
Withdrawing funds on Dragonchain’s console requires three clicks, however, withdrawal scenarios with more enhanced security features per Reddit’s discretion are obtainable.

Interoperability Compatibility with third party apps (wallets/contracts/etc) is necessary.
Proven interoperability at scale that surpasses the required specifications. Our entire platform consists of interoperable blockchains connected to each other and traditional systems. APIs are well documented. Third party permissions are possible with a simple smart contract without the end user being aware. No need to learn any specialized proprietary language. Any code base (not subsets) is usable within a Docker container. Interoperable with any blockchain or traditional APIs. We’ve witnessed relatively complex systems built by engineers with no blockchain or cryptocurrency experience. We’ve also demonstrated the creation of smart contracts within minutes built with BASH shell and Node.js. Please see our source code and API documentation.

Scaling solutions should be extensible and allow third parties to build on top of it Open source and extensible
APIs should be well documented and stable

Documentation should be clear and complete
For full documentation, explore our docs, SDK’s, Github repo’s, architecture documents, original Disney documentation, and other links or resources provided in this proposal.

Third-party permissionless integrations should be possible & straightforward Smart contracts are Docker based, can be written in any language, use full language (not subsets), and can therefore be integrated with any system including traditional system APIs. Simple is better. Learning an uncommon or proprietary language should not be necessary.
Advanced knowledge of mathematics, cryptography, or L2 scaling should not be required. Compatibility with common utilities & toolchains is expected.
Dragonchain business nodes and smart contracts leverage Docker to allow the use of literally any language or executable code. No proprietary language is necessary. We’ve witnessed relatively complex systems built by engineers with no blockchain or cryptocurrency experience. We’ve also demonstrated the creation of smart contracts within minutes built with BASH shell and Node.js.

Bonus

Bonus Points: Show us how it works. Do you have an idea for a cool new use case for Community Points? Build it!

TIME

Community points could be awarded to Reddit users based upon TIME too, whereas the longer someone is part of a subreddit, the more community points someone naturally gained, even if not actively commenting or sharing new posts. A daily login could be required for these community points to be credited. This grants awards to readers too and incentivizes readers to create an account on Reddit if they browse the website often. This concept could also be leveraged to provide some level of reputation based upon duration and consistency of contribution to a community subreddit.

Dragon Den

Dragonchain has already built a social media platform that harnesses community involvement. Dragon Den is a decentralized community built on the Dragonchain blockchain platform. Dragon Den is Dragonchain’s answer to fake news, trolling, and censorship. It incentivizes the creation and evaluation of quality content within communities. It could be described as being a shareholder of a subreddit or Reddit in its entirety. The more your subreddit is thriving, the more rewarding it will be. Den is currently in a public beta and in active development, though the real token economy is not live yet. There are different tokens for various purposes. Two tokens are Lair Ownership Rights (LOR) and Lair Ownership Tokens (LOT). LOT is a non-fungible token for ownership of a specific Lair. LOT will only be created and converted from LOR.
Energy (NRG) and Matter (MTR) work jointly. Your MTR determines how much NRG you receive in a 24-hour period. Providing quality content, or evaluating content will earn MTR.

Security. Users have full ownership & control of their points.
All community points awarded based upon any type of activity or gift, are secured and provable to all Interchain networks (currently BTC, ETH, ETC). Users are free to spend and withdraw their points as they please, depending on the features Reddit wants to bring into production.

Balances and transactions cannot be forged, manipulated, or blocked by Reddit or anyone else
Users can withdraw their balance to their ERC20 wallet, directly through Reddit. Reddit can cover the fees on their behalf, or the user covers this with a portion of their balance.

Users should own their points and be able to get on-chain ERC20 tokens without permission from anyone else
Through our console users can withdraw their ERC20 rewards. This can be achieved on Reddit too. Here is a walkthrough of our console, though this does not show the quick withdrawal functionality, a user can withdraw at any time. https://www.youtube.com/watch?v=aNlTMxnfVHw

Points should be recoverable to on-chain ERC20 tokens even if all third-parties involved go offline
If necessary, signed transactions from the Reddit system (e.g. Reddit + Subreddit) can be sent to the Ethereum smart contract for minting.

A public, third-party review attesting to the soundness of the design should be available
To our knowledge, at least two large corporations, including a top 3 accounting firm, have conducted positive reviews. These reviews have never been made public, as Dragonchain did not pay or contract for these studies to be released.

Bonus points
Public, third-party implementation review available or in progress
See above

Compatibility with HSMs & hardware wallets
For the purpose of this proposal, all tokenization would be on the Ethereum network using standard token contracts and as such, would be able to leverage all hardware wallet and Ethereum ecosystem services.

Other Considerations

Minting/distributing tokens is not performed by Reddit directly
This operation can be automated by smart contract on Ethereum. Subreddits can if desired have a role to play.

One off point burning, as well as recurring, non-interactive point burning (for subreddit memberships) should be possible and scalable
This is possible and scalable with interaction between Dragonchain Reddit system and Ethereum token contract(s).

Fully open-source solutions are strongly preferred
Dragonchain is fully open source (see section on Disney release after conclusion).

Conclusion

Whether it is today, or in the future, we would like to work together to bring secure flexibility to the highest standards. It is our hope to be considered by Ethereum, Reddit, and other integrative solutions so we may further discuss the possibilities of implementation. In our public demonstration, 256 million transactions were handled in our operational network on chain in 24 hours, for the low cost of $25K, which if run today would cost $625. Dragonchain’s interoperable foundation provides the atmosphere necessary to implement a frictionless community points system. Thank you for your consideration of our proposal. We look forward to working with the community to make something great!

Disney Releases Blockchain Platform as Open Source

The team at Disney created the Disney Private Blockchain Platform. The system was a hybrid interoperable blockchain platform for ledgering and smart contract development geared toward solving problems with blockchain adoption and usability. All objective evaluation would consider the team’s output a success. We released a list of use cases that we explored in some capacity at Disney, and our input on blockchain standardization as part of our participation in the W3C Blockchain Community Group.
https://lists.w3.org/Archives/Public/public-blockchain/2016May/0052.html

Open Source

In 2016, Roets proposed to release the platform as open source to spread the technology outside of Disney, as others within the W3C group were interested in the solutions that had been created inside of Disney.
Following a long process, step by step, the team met requirements for release. Among the requirements, the team had to:
  • Obtain VP support and approval for the release
  • Verify ownership of the software to be released
  • Verify that no proprietary content would be released
  • Convince the organization that there was a value to the open source community
  • Convince the organization that there was a value to Disney
  • Offer the plan for ongoing maintenance of the project outside of Disney
  • Itemize competing projects
  • Verify no conflict of interest
  • Preferred license
  • Change the project name to not use the name Disney, any Disney character, or any other associated IP - proposed Dragonchain - approved
  • Obtain legal approval
  • Approval from corporate, parks, and other business units
  • Approval from multiple Disney patent groups Copyright holder defined by Disney (Disney Connected and Advanced Technologies)
  • Trademark searches conducted for the selected name Dragonchain
  • Obtain IT security approval
  • Manual review of OSS components conducted
  • OWASP Dependency and Vulnerability Check Conducted
  • Obtain technical (software) approval
  • Offer management, process, and financial plans for the maintenance of the project.
  • Meet list of items to be addressed before release
  • Remove all Disney project references and scripts
  • Create a public distribution list for email communications
  • Remove Roets’ direct and internal contact information
  • Create public Slack channel and move from Disney slack channels
  • Create proper labels for issue tracking
  • Rename internal private Github repository
  • Add informative description to Github page
  • Expand README.md with more specific information
  • Add information beyond current “Blockchains are Magic”
  • Add getting started sections and info on cloning/forking the project
  • Add installation details
  • Add uninstall process
  • Add unit, functional, and integration test information
  • Detail how to contribute and get involved
  • Describe the git workflow that the project will use
  • Move to public, non-Disney git repository (Github or Bitbucket)
  • Obtain Disney Open Source Committee approval for release
On top of meeting the above criteria, as part of the process, the maintainer of the project had to receive the codebase on their own personal email and create accounts for maintenance (e.g. Github) with non-Disney accounts. Given the fact that the project spanned multiple business units, Roets was individually responsible for its ongoing maintenance. Because of this, he proposed in the open source application to create a non-profit organization to hold the IP and maintain the project. This was approved by Disney.
The Disney Open Source Committee approved the application known as OSSRELEASE-10, and the code was released on October 2, 2016. Disney decided to not issue a press release.
Original OSSRELASE-10 document

Dragonchain Foundation

The Dragonchain Foundation was created on January 17, 2017. https://den.social/l/Dragonchain/24130078352e485d96d2125082151cf0/dragonchain-and-disney/
submitted by j0j0r0 to ethereum [link] [comments]

Scaling Reddit Community Points with Arbitrum Rollup: a piece of cake

Scaling Reddit Community Points with Arbitrum Rollup: a piece of cake
https://preview.redd.it/b80c05tnb9e51.jpg?width=2550&format=pjpg&auto=webp&s=850282c1a3962466ed44f73886dae1c8872d0f31
Submitted for consideration to The Great Reddit Scaling Bake-Off
Baked by the pastry chefs at Offchain Labs
Please send questions or comments to [[email protected] ](mailto:[email protected])
1. Overview
We're excited to submit Arbitrum Rollup for consideration to The Great Reddit Scaling Bake-Off. Arbitrum Rollup is the only Ethereum scaling solution that supports arbitrary smart contracts without compromising on Ethereum's security or adding points of centralization. For Reddit, this means that Arbitrum can not only scale the minting and transfer of Community Points, but it can foster a creative ecosystem built around Reddit Community Points enabling points to be used in a wide variety of third party applications. That's right -- you can have your cake and eat it too!
Arbitrum Rollup isn't just Ethereum-style. Its Layer 2 transactions are byte-for-byte identical to Ethereum, which means Ethereum users can continue to use their existing addresses and wallets, and Ethereum developers can continue to use their favorite toolchains and development environments out-of-the-box with Arbitrum. Coupling Arbitrum’s tooling-compatibility with its trustless asset interoperability, Reddit not only can scale but can onboard the entire Ethereum community at no cost by giving them the same experience they already know and love (well, certainly know).
To benchmark how Arbitrum can scale Reddit Community Points, we launched the Reddit contracts on an Arbitrum Rollup chain. Since Arbitrum provides full Solidity support, we didn't have to rewrite the Reddit contracts or try to mimic their functionality using an unfamiliar paradigm. Nope, none of that. We launched the Reddit contracts unmodified on Arbitrum Rollup complete with support for minting and distributing points. Like every Arbitrum Rollup chain, the chain included a bridge interface in which users can transfer Community Points or any other asset between the L1 and L2 chains. Arbitrum Rollup chains also support dynamic contract loading, which would allow third-party developers to launch custom ecosystem apps that integrate with Community Points on the very same chain that runs the Reddit contracts.
1.1 Why Ethereum
Perhaps the most exciting benefit of distributing Community Points using a blockchain is the ability to seamlessly port points to other applications and use them in a wide variety of contexts. Applications may include simple transfers such as a restaurant that allows Redditors to spend points on drinks. Or it may include complex smart contracts -- such as placing Community Points as a wager for a multiparty game or as collateral in a financial contract.
The common denominator between all of the fun uses of Reddit points is that it needs a thriving ecosystem of both users and developers, and the Ethereum blockchain is perhaps the only smart contract platform with significant adoption today. While many Layer 1 blockchains boast lower cost or higher throughput than the Ethereum blockchain, more often than not, these attributes mask the reality of little usage, weaker security, or both.
Perhaps another platform with significant usage will rise in the future. But today, Ethereum captures the mindshare of the blockchain community, and for Community Points to provide the most utility, the Ethereum blockchain is the natural choice.
1.2 Why Arbitrum
While Ethereum's ecosystem is unmatched, the reality is that fees are high and capacity is too low to support the scale of Reddit Community Points. Enter Arbitrum. Arbitrum Rollup provides all of the ecosystem benefits of Ethereum, but with orders of magnitude more capacity and at a fraction of the cost of native Ethereum smart contracts. And most of all, we don't change the experience from users. They continue to use the same wallets, addresses, languages, and tools.
Arbitrum Rollup is not the only solution that can scale payments, but it is the only developed solution that can scale both payments and arbitrary smart contracts trustlessly, which means that third party users can build highly scalable add-on apps that can be used without withdrawing money from the Rollup chain. If you believe that Reddit users will want to use their Community Points in smart contracts--and we believe they will--then it makes the most sense to choose a single scaling solution that can support the entire ecosystem, eliminating friction for users.
We view being able to run smart contracts in the same scaling solution as fundamentally critical since if there's significant demand in running smart contracts from Reddit's ecosystem, this would be a load on Ethereum and would itself require a scaling solution. Moreover, having different scaling solutions for the minting/distribution/spending of points and for third party apps would be burdensome for users as they'd have to constantly shuffle their Points back and forth.
2. Arbitrum at a glance
Arbitrum Rollup has a unique value proposition as it offers a combination of features that no other scaling solution achieves. Here we highlight its core attributes.
Decentralized. Arbitrum Rollup is as decentralized as Ethereum. Unlike some other Layer 2 scaling projects, Arbitrum Rollup doesn't have any centralized components or centralized operators who can censor users or delay transactions. Even in non-custodial systems, centralized components provide a risk as the operators are generally incentivized to increase their profit by extracting rent from users often in ways that severely degrade user experience. Even if centralized operators are altruistic, centralized components are subject to hacking, coercion, and potential liability.
Massive Scaling. Arbitrum achieves order of magnitude scaling over Ethereum's L1 smart contracts. Our software currently supports 453 transactions-per-second for basic transactions (at 1616 Ethereum gas per tx). We have a lot of room left to optimize (e.g. aggregating signatures), and over the next several months capacity will increase significantly. As described in detail below, Arbitrum can easily support and surpass Reddit's anticipated initial load, and its capacity will continue to improve as Reddit's capacity needs grow.
Low cost. The cost of running Arbitrum Rollup is quite low compared to L1 Ethereum and other scaling solutions such as those based on zero-knowledge proofs. Layer 2 fees are low, fixed, and predictable and should not be overly burdensome for Reddit to cover. Nobody needs to use special equipment or high-end machines. Arbitrum requires validators, which is a permissionless role that can be run on any reasonable on-line machine. Although anybody can act as a validator, in order to protect against a “tragedy of the commons” and make sure reputable validators are participating, we support a notion of “invited validators” that are compensated for their costs. In general, users pay (low) fees to cover the invited validators’ costs, but we imagine that Reddit may cover this cost for its users. See more on the costs and validator options below.
Ethereum Developer Experience. Not only does Arbitrum support EVM smart contracts, but the developer experience is identical to that of L1 Ethereum contracts and fully compatible with Ethereum tooling. Developers can port existing Solidity apps or write new ones using their favorite and familiar toolchains (e.g. Truffle, Buidler). There are no new languages or coding paradigms to learn.
Ethereum wallet compatibility. Just as in Ethereum, Arbitrum users need only hold keys, but do not have to store any coin history or additional data to protect or access their funds. Since Arbitrum transactions are semantically identical to Ethereum L1 transactions, existing Ethereum users can use their existing Ethereum keys with their existing wallet software such as Metamask.
Token interoperability. Users can easily transfer their ETH, ERC-20 and ERC-721 tokens between Ethereum and the Arbitrum Rollup chain. As we explain in detail below, it is possible to mint tokens in L2 that can subsequently be withdrawn and recognized by the L1 token contract.
Fast finality. Transactions complete with the same finality time as Ethereum L1 (and it's possible to get faster finality guarantees by trading away trust assumptions; see the Arbitrum Rollup whitepaper for details).
Non-custodial. Arbitrum Rollup is a non-custodial scaling solution, so users control their funds/points and neither Reddit nor anyone else can ever access or revoke points held by users.
Censorship Resistant. Since it's completely decentralized, and the Arbitrum protocol guarantees progress trustlessly, Arbitrum Rollup is just as censorship-proof as Ethereum.
Block explorer. The Arbitrum Rollup block explorer allows users to view and analyze transactions on the Rollup chain.
Limitations
Although this is a bake-off, we're not going to sugar coat anything. Arbitrum Rollup, like any Optimistic Rollup protocol, does have one limitation, and that's the delay on withdrawals.
As for the concrete length of the delay, we've done a good deal of internal modeling and have blogged about this as well. Our current modeling suggests a 3-hour delay is sufficient (but as discussed in the linked post there is a tradeoff space between the length of the challenge period and the size of the validators’ deposit).
Note that this doesn't mean that the chain is delayed for three hours. Arbitrum Rollup supports pipelining of execution, which means that validators can keep building new states even while previous ones are “in the pipeline” for confirmation. As the challenge delays expire for each update, a new state will be confirmed (read more about this here).
So activity and progress on the chain are not delayed by the challenge period. The only thing that's delayed is the consummation of withdrawals. Recall though that any single honest validator knows immediately (at the speed of L1 finality) which state updates are correct and can guarantee that they will eventually be confirmed, so once a valid withdrawal has been requested on-chain, every honest party knows that the withdrawal will definitely happen. There's a natural place here for a liquidity market in which a validator (or someone who trusts a validator) can provide withdrawal loans for a small interest fee. This is a no-risk business for them as they know which withdrawals will be confirmed (and can force their confirmation trustlessly no matter what anyone else does) but are just waiting for on-chain finality.
3. The recipe: How Arbitrum Rollup works
For a description of the technical components of Arbitrum Rollup and how they interact to create a highly scalable protocol with a developer experience that is identical to Ethereum, please refer to the following documents:
Arbitrum Rollup Whitepaper
Arbitrum academic paper (describes a previous version of Arbitrum)
4. Developer docs and APIs
For full details about how to set up and interact with an Arbitrum Rollup chain or validator, please refer to our developer docs, which can be found at https://developer.offchainlabs.com/.
Note that the Arbitrum version described on that site is older and will soon be replaced by the version we are entering in Reddit Bake-Off, which is still undergoing internal testing before public release.
5. Who are the validators?
As with any Layer 2 protocol, advancing the protocol correctly requires at least one validator (sometimes called block producers) that is honest and available. A natural question is: who are the validators?
Recall that the validator set for an Arbitrum chain is open and permissionless; anyone can start or stop validating at will. (A useful analogy is to full nodes on an L1 chain.) But we understand that even though anyone can participate, Reddit may want to guarantee that highly reputable nodes are validating their chain. Reddit may choose to validate the chain themselves and/or hire third-party validators.To this end, we have begun building a marketplace for validator-for-hire services so that dapp developers can outsource validation services to reputable nodes with high up-time. We've announced a partnership in which Chainlink nodes will provide Arbitrum validation services, and we expect to announce more partnerships shortly with other blockchain infrastructure providers.
Although there is no requirement that validators are paid, Arbitrum’s economic model tracks validators’ costs (e.g. amount of computation and storage) and can charge small fees on user transactions, using a gas-type system, to cover those costs. Alternatively, a single party such as Reddit can agree to cover the costs of invited validators.
6. Reddit Contract Support
Since Arbitrum contracts and transactions are byte-for-byte compatible with Ethereum, supporting the Reddit contracts is as simple as launching them on an Arbitrum chain.
Minting. Arbitrum Rollup supports hybrid L1/L2 tokens which can be minted in L2 and then withdrawn onto the L1. An L1 contract at address A can make a special call to the EthBridge which deploys a "buddy contract" to the same address A on an Arbitrum chain. Since it's deployed at the same address, users can know that the L2 contract is the authorized "buddy" of the L1 contract on the Arbitrum chain.
For minting, the L1 contract is a standard ERC-20 contract which mints and burns tokens when requested by the L2 contract. It is paired with an ERC-20 contract in L2 which mints tokens based on whatever programmer provided minting facility is desired and burns tokens when they are withdrawn from the rollup chain. Given this base infrastructure, Arbitrum can support any smart contract based method for minting tokens in L2, and indeed we directly support Reddit's signature/claim based minting in L2.
Batch minting. What's better than a mint cookie? A whole batch! In addition to supporting Reddit’s current minting/claiming scheme, we built a second minting design, which we believe outperforms the signature/claim system in many scenarios.
In the current system, Reddit periodically issues signed statements to users, who then take those statements to the blockchain to claim their tokens. An alternative approach would have Reddit directly submit the list of users/amounts to the blockchain and distribute the tokens to the users without the signature/claim process.
To optimize the cost efficiency of this approach, we designed an application-specific compression scheme to minimize the size of the batch distribution list. We analyzed the data from Reddit's previous distributions and found that the data is highly compressible since token amounts are small and repeated, and addresses appear multiple times. Our function groups transactions by size, and replaces previously-seen addresses with a shorter index value. We wrote client code to compress the data, wrote a Solidity decompressing function, and integrated that function into Reddit’s contract running on Arbitrum.
When we ran the compression function on the previous Reddit distribution data, we found that we could compress batched minting data down to to 11.8 bytes per minting event (averaged over a 6-month trace of Reddit’s historical token grants)compared with roughly 174 bytes of on-chain data needed for the signature claim approach to minting (roughly 43 for an RLP-encoded null transaction + 65 for Reddit's signature + 65 for the user's signature + roughly 8 for the number of Points) .
The relative benefit of the two approaches with respect to on-chain call data cost depends on the percentage of users that will actually claim their tokens on chain. With the above figures, batch minting will be cheaper if roughly 5% of users redeem their claims. We stress that our compression scheme is not Arbitrum-specific and would be beneficial in any general-purpose smart contract platform.
8. Benchmarks and costs
In this section, we give the full costs of operating the Reddit contracts on an Arbitrum Rollup chain including the L1 gas costs for the Rollup chain, the costs of computation and storage for the L2 validators as well as the capital lockup requirements for staking.
Arbitrum Rollup is still on testnet, so we did not run mainnet benchmarks. Instead, we measured the L1 gas cost and L2 workload for Reddit operations on Arbitrum and calculated the total cost assuming current Ethereum gas prices. As noted below in detail, our measurements do not assume that Arbitrum is consuming the entire capacity of Ethereum. We will present the details of our model now, but for full transparency you can also play around with it yourself and adjust the parameters, by copying the spreadsheet found here.
Our cost model is based on measurements of Reddit’s contracts, running unmodified (except for the addition of a batch minting function) on Arbitrum Rollup on top of Ethereum.
On the distribution of transactions and frequency of assertions. Reddit's instructions specify the following minimum parameters that submissions should support:
Over a 5 day period, your scaling PoC should be able to handle:
  • 100,000 point claims (minting & distributing points)
  • 25,000 subscriptions
  • 75,000 one-off points burning
  • 100,000 transfers
We provide the full costs of operating an Arbitrum Rollup chain with this usage under the assumption that tokens are minted or granted to users in batches, but other transactions are uniformly distributed over the 5 day period. Unlike some other submissions, we do not make unrealistic assumptions that all operations can be submitted in enormous batches. We assume that batch minting is done in batches that use only a few percent on an L1 block’s gas, and that other operations come in evenly over time and are submitted in batches, with one batch every five minutes to keep latency reasonable. (Users are probably already waiting for L1 finality, which takes at least that long to achieve.)
We note that assuming that there are only 300,000 transactions that arrive uniformly over the 5 day period will make our benchmark numbers lower, but we believe that this will reflect the true cost of running the system. To see why, say that batches are submitted every five minutes (20 L1 blocks) and there's a fixed overhead of c bytes of calldata per batch, the cost of which will get amortized over all transactions executed in that batch. Assume that each individual transaction adds a marginal cost of t. Lastly assume the capacity of the scaling system is high enough that it can support all of Reddit's 300,000 transactions within a single 20-block batch (i.e. that there is more than c + 300,000*t byes of calldata available in 20 blocks).
Consider what happens if c, the per-batch overhead, is large (which it is in some systems, but not in Arbitrum). In the scenario that transactions actually arrive at the system's capacity and each batch is full, then c gets amortized over 300,000 transactions. But if we assume that the system is not running at capacity--and only receives 300,000 transactions arriving uniformly over 5 days-- then each 20-block assertion will contain about 200 transactions, and thus each transaction will pay a nontrivial cost due to c.
We are aware that other proposals presented scaling numbers assuming that 300,000 transactions arrived at maximum capacity and was executed in a single mega-transaction, but according to our estimates, for at least one such report, this led to a reported gas price that was 2-3 orders of magnitude lower than it would have been assuming uniform arrival. We make more realistic batching assumptions, and we believe Arbitrum compares well when batch sizes are realistic.
Our model. Our cost model includes several sources of cost:
  • L1 gas costs: This is the cost of posting transactions as calldata on the L1 chain, as well as the overhead associated with each batch of transactions, and the L1 cost of settling transactions in the Arbitrum protocol.
  • Validator’s staking costs: In normal operation, one validator will need to be staked. The stake is assumed to be 0.2% of the total value of the chain (which is assumed to be $1 per user who is eligible to claim points). The cost of staking is the interest that could be earned on the money if it were not staked.
  • Validator computation and storage: Every validator must do computation to track the chain’s processing of transactions, and must maintain storage to keep track of the contracts’ EVM storage. The cost of computation and storage are estimated based on measurements, with the dollar cost of resources based on Amazon Web Services pricing.
It’s clear from our modeling that the predominant cost is for L1 calldata. This will probably be true for any plausible rollup-based system.
Our model also shows that Arbitrum can scale to workloads much larger than Reddit’s nominal workload, without exhausting L1 or L2 resources. The scaling bottleneck will ultimately be calldata on the L1 chain. We believe that cost could be reduced substantially if necessary by clever encoding of data. (In our design any compression / decompression of L2 transaction calldata would be done by client software and L2 programs, never by an L1 contract.)
9. Status of Arbitrum Rollup
Arbitrum Rollup is live on Ethereum testnet. All of the code written to date including everything included in the Reddit demo is open source and permissively licensed under the Apache V2 license. The first testnet version of Arbitrum Rollup was released on testnet in February. Our current internal version, which we used to benchmark the Reddit contracts, will be released soon and will be a major upgrade.
Both the Arbitrum design as well as the implementation are heavily audited by independent third parties. The Arbitrum academic paper was published at USENIX Security, a top-tier peer-reviewed academic venue. For the Arbitrum software, we have engaged Trail of Bits for a security audit, which is currently ongoing, and we are committed to have a clean report before launching on Ethereum mainnet.
10. Reddit Universe Arbitrum Rollup Chain
The benchmarks described in this document were all measured using the latest internal build of our software. When we release the new software upgrade publicly we will launch a Reddit Universe Arbitrum Rollup chain as a public demo, which will contain the Reddit contracts as well as a Uniswap instance and a Connext Hub, demonstrating how Community Points can be integrated into third party apps. We will also allow members of the public to dynamically launch ecosystem contracts. We at Offchain Labs will cover the validating costs for the Reddit Universe public demo.
If the folks at Reddit would like to evaluate our software prior to our public demo, please email us at [email protected] and we'd be more than happy to provide early access.
11. Even more scaling: Arbitrum Sidechains
Rollups are an excellent approach to scaling, and we are excited about Arbitrum Rollup which far surpasses Reddit's scaling needs. But looking forward to Reddit's eventual goal of supporting hundreds of millions of users, there will likely come a time when Reddit needs more scaling than any Rollup protocol can provide.
While Rollups greatly reduce costs, they don't break the linear barrier. That is, all transactions have an on-chain footprint (because all calldata must be posted on-chain), albeit a far smaller one than on native Ethereum, and the L1 limitations end up being the bottleneck for capacity and cost. Since Ethereum has limited capacity, this linear use of on-chain resources means that costs will eventually increase superlinearly with traffic.
The good news is that we at Offchain Labs have a solution in our roadmap that can satisfy this extreme-scaling setting as well: Arbitrum AnyTrust Sidechains. Arbitrum Sidechains are similar to Arbitrum Rollup, but deviate in that they name a permissioned set of validators. When a chain’s validators agree off-chain, they can greatly reduce the on-chain footprint of the protocol and require almost no data to be put on-chain. When validators can't reach unanimous agreement off-chain, the protocol reverts to Arbitrum Rollup. Technically, Arbitrum Sidechains can be viewed as a hybrid between state channels and Rollup, switching back and forth as necessary, and combining the performance and cost that state channels can achieve in the optimistic case, with the robustness of Rollup in other cases. The core technical challenge is how to switch seamlessly between modes and how to guarantee that security is maintained throughout.
Arbitrum Sidechains break through this linear barrier, while still maintaining a high level of security and decentralization. Arbitrum Sidechains provide the AnyTrust guarantee, which says that as long as any one validator is honest and available (even if you don't know which one will be), the L2 chain is guaranteed to execute correctly according to its code and guaranteed to make progress. Unlike in a state channel, offchain progress does not require unanimous consent, and liveness is preserved as long as there is a single honest validator.
Note that the trust model for Arbitrum Sidechains is much stronger than for typical BFT-style chains which introduce a consensus "voting" protocols among a small permissioned group of validators. BFT-based protocols require a supermajority (more than 2/3) of validators to agree. In Arbitrum Sidechains, by contrast, all you need is a single honest validator to achieve guaranteed correctness and progress. Notice that in Arbitrum adding validators strictly increases security since the AnyTrust guarantee provides correctness as long as any one validator is honest and available. By contrast, in BFT-style protocols, adding nodes can be dangerous as a coalition of dishonest nodes can break the protocol.
Like Arbitrum Rollup, the developer and user experiences for Arbitrum Sidechains will be identical to that of Ethereum. Reddit would be able to choose a large and diverse set of validators, and all that they would need to guarantee to break through the scaling barrier is that a single one of them will remain honest.
We hope to have Arbitrum Sidechains in production in early 2021, and thus when Reddit reaches the scale that surpasses the capacity of Rollups, Arbitrum Sidechains will be waiting and ready to help.
While the idea to switch between channels and Rollup to get the best of both worlds is conceptually simple, getting the details right and making sure that the switch does not introduce any attack vectors is highly non-trivial and has been the subject of years of our research (indeed, we were working on this design for years before the term Rollup was even coined).
12. How Arbitrum compares
We include a comparison to several other categories as well as specific projects when appropriate. and explain why we believe that Arbitrum is best suited for Reddit's purposes. We focus our attention on other Ethereum projects.
Payment only Rollups. Compared to Arbitrum Rollup, ZK-Rollups and other Rollups that only support token transfers have several disadvantages:
  • As outlined throughout the proposal, we believe that the entire draw of Ethereum is in its rich smart contracts support which is simply not achievable with today's zero-knowledge proof technology. Indeed, scaling with a ZK-Rollup will add friction to the deployment of smart contracts that interact with Community Points as users will have to withdraw their coins from the ZK-Rollup and transfer them to a smart contract system (like Arbitrum). The community will be best served if Reddit builds on a platform that has built-in, frictionless smart-contract support.
  • All other Rollup protocols of which we are aware employ a centralized operator. While it's true that users retain custody of their coins, the centralized operator can often profit from censoring, reordering, or delaying transactions. A common misconception is that since they're non-custodial protocols, a centralized sequencer does not pose a risk but this is incorrect as the sequencer can wreak havoc or shake down users for side payments without directly stealing funds.
  • Sidechain type protocols can eliminate some of these issues, but they are not trustless. Instead, they require trust in some quorum of a committee, often requiring two-third of the committee to be honest, compared to rollup protocols like Arbitrum that require only a single honest party. In addition, not all sidechain type protocols have committees that are diverse, or even non-centralized, in practice.
  • Plasma-style protocols have a centralized operator and do not support general smart contracts.
13. Concluding Remarks
While it's ultimately up to the judges’ palate, we believe that Arbitrum Rollup is the bakeoff choice that Reddit kneads. We far surpass Reddit's specified workload requirement at present, have much room to optimize Arbitrum Rollup in the near term, and have a clear path to get Reddit to hundreds of millions of users. Furthermore, we are the only project that gives developers and users the identical interface as the Ethereum blockchain and is fully interoperable and tooling-compatible, and we do this all without any new trust assumptions or centralized components.
But no matter how the cookie crumbles, we're glad to have participated in this bake-off and we thank you for your consideration.
About Offchain Labs
Offchain Labs, Inc. is a venture-funded New York company that spun out of Princeton University research, and is building the Arbitrum platform to usher in the next generation of scalable, interoperable, and compatible smart contracts. Offchain Labs is backed by Pantera Capital, Compound VC, Coinbase Ventures, and others.
Leadership Team
Ed Felten
Ed Felten is Co-founder and Chief Scientist at Offchain Labs. He is on leave from Princeton University, where he is the Robert E. Kahn Professor of Computer Science and Public Affairs. From 2015 to 2017 he served at the White House as Deputy United States Chief Technology Officer and senior advisor to the President. He is an ACM Fellow and member of the National Academy of Engineering. Outside of work, he is an avid runner, cook, and L.A. Dodgers fan.
Steven Goldfeder
Steven Goldfeder is Co-founder and Chief Executive Officer at Offchain Labs. He holds a PhD from Princeton University, where he worked at the intersection of cryptography and cryptocurrencies including threshold cryptography, zero-knowledge proof systems, and post-quantum signatures. He is a co-author of Bitcoin and Cryptocurrency Technologies, the leading textbook on cryptocurrencies, and he has previously worked at Google and Microsoft Research, where he co-invented the Picnic signature algorithm. When not working, you can find Steven spending time with his family, taking a nature walk, or twisting balloons.
Harry Kalodner
Harry Kalodner is Co-founder and Chief Technology Officer at Offchain Labs where he leads the engineering team. Before the company he attended Princeton as a Ph.D candidate where his research explored economics, anonymity, and incentive compatibility of cryptocurrencies, and he also has worked at Apple. When not up at 3:00am writing code, Harry occasionally sleeps.
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dxDAO aims to power DeFi protocols through decentralized governance

I found this article on internet. It's repost of it to help educate people about all DXDao advantages:
These are positive and necessary steps for DeFi. The new governance structures are intended to help coordinate across community stakeholders and make better decisions. These dynamics are influenced by the issues covered in Dose of DeFi, but I believe they deserve their own focused analysis.
Govern This aims to educate token holders and make them better voters. Emphasis will be placed on specific governance proposals and relaying community governance discussions on forums and weekly calls.
Governance is a coordination technology that has helped countries and companies build more than the sum of their parts. Blockchains are also a coordination technology, but for computers, not humans***.*** Govern This will track the development of the melding of these two over the coming years.
Like governance, Govern This is a work in progress. I would appreciate any feedback on format, topics covered or any other suggestions to make the newsletter better. Just hit reply.
The first issue of Govern This is below. Please click here to subscribe.
Thanks for reading,
Chris
📷
dxDAO aims to power DeFi protocols through decentralized governance
Gnosis launched a long-awaited DEX last week with batched auctions for low-liquidity trade pairs. The front-end, Mesa.Eth.Link is owned and operated by dxDAO, a decentralized collective that hopes to power other DeFi protocols.
While dYdX does not have any specific governance plans (yet), this tweet from dYdX founder Antonio Juliano is a common approach to governance.
📷Antonio Juliano @AntonioMJuliano3) 0x should focus less on governance in the short term. It’s way more important to first build something with a large amount of adoption that’s worth governing
December 6th 2018
3 Retweets62 Likes
The tweet at the end of 2018 was in response to 0x and its native token, ZRX. The project was popular but the token had no use case outside of governance.
This governance strategy – build now, decentralize later – is widely accepted in the space and is perhaps best exemplified by the A16Z’s Jesse Walden’s post, “Progressive Decentralization: A Playbook for Building Crypto Applications”, which the A16Z-backed Compound has essentially implemented (more in the section below).
dxDAO, on the other hand, maintains that decentralization must come at the beginning or else the core team and investors will have an outsized influence on the project in formal (token voting) or informal ways (dictators for life).
Background
dxDAO was launched in May 2019, spun out of a collaboration between Gnosis and DAOstack over managing the DutchX platform. dxDAO’s key governance design is separating financial rights to the DAO (DXD) from voting power over the DAO (Reputation). It used an Edgeware-style lock drop to distribute reputation to stakeholders in May of last year. Any user could lock up ETH or an accepted ERC-20 for a month and receive Reputation, which are voting rights in dxDAO, even though it is not a token and cannot be transferred.
Over 400 unique Ethereum addresses participated in the distribution scheme. Gnosis went through a pretty extensive process in July 2019 to “step back” from its involvement in the DAO, and since then, the community and dxDAO have aligned behind a mission of “putting the ‘De’ in Decentralized Finance”.
Following on last week’s launch of Mesa.ETH.Link, dxDAO is conducting a fundraiser or (“DAICO”?) to help fund its new slate of DeFi products, including a prediction market platform (Omen) and a privacy-centric DeFi dashboard (Mix).
Project launch is typically when a project is most centralized. Execution is hard and direction and accountability are important. dxDAO’s approach will be an interesting counterexample to the “decentralize later” trend and may provide insight into new governance strategies.
Click here for more information about the dxDAO fundraiser.
Here’s what is on the dxDAO docket this week:
Compound governance goes live, has it found Market-Protocol-Fit?
Since its founding in 2017, Compound has executed with an almost flawless record: no bugs/hacks, a major protocol upgrade and a big name fundraise (twice).
But all of that has been because Compound, the company, has executed well, but can protocol development and the growth of the platform be sustained with community management? We shall see.
Compound’s governance system could not be simpler. Anyone with at least 1% of COMP can submit a proposal of executable code. COMP holders have a 3 day voting period; the proposal passes with a majority of token votes AND a 4% quorum of all COMP tokens.
The 1% minimum for proposal submission is a good anti-Sybil mechanism but it greatly limits participation by small users. There is delegation, so you could imagine a “proposal petition” where you would delegate your COMP to a proposal instead of signing your name.
Compound is clearly taking the “less governance is the best governance” approach. This has worked surprisingly well with Bitcoin and Ethereum, which of course, do not have any formal governance, but those communities clearly have informal governance systems that make decisions.
The biggest governance question for Compound: who is the community?
Market-Protocol-Fit
Other Internet has an intriguing essay on the emergent order from new blockchain tokens and their communities. It is worth a read. It discusses the emergent iteration that blockchains – as a technology and a community – go through to find a niche, both in culture and product.
While it focuses on base-layer blockchains that launch with a token, the essay underscores the most underrated governance element: token distribution. It quotes an insightful tweet from Eric Wall
📷Eric Wall @ercwlA question that keeps me up at night: Is it possible to create a rubbish coin based on advanced bullshit, build a community of misguided fans nevertheless, run it centralized for 5 yrs, hardfork-copy the design of a real working project, keep the community and become a success?
keysheet @keysheet
@ErcWll was one of the first vocal critics of IOTA back in 2017, shortly before the project hit a market cap of $15B. https://t.co/2267e8LEpl Today, the project is down 99% and appears to be brutally falling apart. A thread:
February 13th 2020
17 Retweets163 Likes
Before Bitcoin could harden its code and find ‘Digital Gold’ and before Ethereum found ‘DeFi’ and ships ETH2.0, both needed to find a “a strong community of believers” in order to create a “virtuous cycle between headless brands and infrastructural build-out to progressively realize [their] initial promise.”
Communities are connected through a wide spread token distribution, Bitcoin through cypherpunks and online drugs and Ethereum through a global ICO (what Teo Leibowitz called “The Immaculate ICO”).
$COMP distribution
The biggest “news” has been details about $COMP distribution:
There are no explicit plans yet, but the widely held assumption is that the COMP distribution will be determined by the interest earned and paid by users on the protocol since its inception. This is a clever way that only incentivizes more use of the protocol and is hard to game because interests accrues over time.
But the question still remains, what will the COMP community look like and what values will it espouse? Can emergent cultures arise out of Silicon Valley too?
Here’s what is on the Compound docket this week:
Maker and wBTC, a test case for the MIP process
While Maker had planned to spend Q2 moving forward with their upgraded governance process, most of its focus has been on restoring the Dai peg.
For more on how the Maker governance process has expanded outside the core community, check out the previous edition of Govern This.
Here’s what is on the Maker docket this week:
Governance and Risk meeting (April 23)
Single Collateral Dai shutdown – the process has begun. A poll passed with May 12 as the official SCD shutdown. Just yesterday, an executive just passed yesterday to make the MKR oracle fee-less, which will help with migration. Many in the community think the migration of debt from SCD will do more than enough to restore the peg.
13 MIPs and 2 sub proposals – Core to the new Maker governance process is the “Maker Improvement Proposals (MIPs), which are modeled off of BIPs (for Bitcoin) and EIPs (for Ethereum). The two sub-proposals are to appoint the Smart Contracts Team and assign Charles St. Louis as the MIP editor.
The 13 MIPs are listed below:
- MIP1 (Maker Governance Paradigms)- MIP2 (Launch Period)- MIP3 (Governance Cycle)- MIP4 (MIP Amendment and Removal Process)- MIP5 (Emergency Voting System)- MIP6 (Collateral Onboarding Form/Forum Template)- MIP7 (Onboarding and Offboarding Domain Teams for Collateral Onboarding)- MIP8 (Domain Greenlight)- MIP9 (Community Greenlight)- MIP10 (Oracle Management)- MIP11 (Collateral Onboarding General Risk Model Management)- MIP12 (Collateral and Risk Parameter Management)
By and large, the MIPs codify many of the informal Maker governance processes. There is currently a request for comments period (MIP forum) and there will be an informal poll on Monday, April 27 on whether to proceed with the 13 MIPs and 2 sub proposals. If it’s a “Yes”, than an executive for an official ratification vote would start on May 1 and lasts for 4 days. If it passes, the official governance cycle will begin and the rest of the MIPs will likely be approved from May 4 – 6.
Other Governing Things
That’s it! Feedback definitely appreciated. Just hit reply. Written in Brooklyn where it rained all day. No euchre today, but yesterday was epic.
Govern This is written by Chris Powers. Opinions expressed are my own. All content is for informational purposes and is not intended as investment advice.
submitted by yaroslav_karpov to CryptoMoonShots [link] [comments]

HEX: answers to your question

HEX is an ERC20 token that got propelled in December 2019. Hex is the main high-intrigue blockchain authentication of store. Positioning dependent on the exchange, HEX is the #3 application on the Ethereum. HEX cryptographic money keeps on having an effective first month. About 50K in Ethereum got changed into HEX coin, and over a billion dollars in Bitcoin got guaranteed. Richard Heart, Founder of HEX, expressed, "HEX is as of now a triumph with 10k in addition to clients, and it's increasing all the more consistently. The innovation works extraordinary, and I am exceptionally content with it," He further expressed, "We have an incredible network, which is delivering astonishing advancement and improvement. The biological system continues showing signs of improvement as every day passes." HEX is a Bitcoin-connected Investment Scheme, that clients will have the option to twofold their cash. "Gracious, it would appear that a trick, I realize that," says Richard Heart, the author of the questionable new cryptographic money HEX. Addressing Tone Vays' Bitcoin Law Review digital broadcast, he concedes that, "on the off chance that you don't investigate it, it would seem that each other trick." This is the thing that makes HEX one of a kind (Updated on December 14: trades, where HEX is accessible, have been included) HEX is "intended to increment in esteem quicker than everything else ever," and clients can gain enthusiasm of up to 369%, contingent upon the measure of HEX they stake. Does this sound unrealistic? All things considered, for some crypto specialists and observers it does. Various specialists either confirm that HEX looks suspicious or that it most certainly is a trick, albeit some point out that it isn't actually a Ponzi trick, regardless of appearances. How is HEX expected to function Here's a concise diagram of how HEX should function, as indicated by its own site. Singular financial specialists can acquire HEX by doing both of three things: 1) demonstrating they claim a specific measure of Bitcoin (BTC) by marking an exchange with their private key; 2) trading Ethereum (ETH) for HEX; or 3) alluding a companion. When clients have HEX, they are then urged to 'stake' the token (for example keep it secured a keen agreement). This wins them intrigue (paid in HEX), which changes relying upon to what extent they keep their HEX staked and the amount of the general inventory of HEX is staked by all clients. "HEX pays stakers swelling," organizer Richard Heart discloses to Cryptonews.com. "After day 353 HEX has all things considered 3.69% swelling, and it's postponed as it's just paid toward the finish of a stake, and stakes can be as long as 5,555 days in length." The HEX site makes reference to that keeping an extent of HEX staked will expand the estimation of unstaked HEX. The thing is, there's no basic rationale, instrument or power by which unstaked HEX procures an incentive in any case.
HEX important links: Website: https://hex.win/ Twitter page: https://twitter.com/HEXCrypto Facebook page: https://www.facebook.com/HEXcrypto Telegram page: https://t.me/HEXcrypto Github: https://github.com/bitcoinHEX Reddit page: https://hexcrypto.reddit.com/ Medium page: https://medium.com/hex-crypto/ Ann: https://bitcointalk.org/index.php?topic=4523610.0
Author information; Bitcointalk username: Tessyad Bitcointalk profile: https://bitcointalk.org/index.php?action=profile;u=2577720;sa=summary
submitted by Tessyad to Cryptocoinworld [link] [comments]

Urbit meetup in North Texas

Hi everybody, I'm holding a meetup in the DFW area for people interested in Urbit next month. If you're interested in the project or want to learn more about it, come hang out! Details are at the end of the post. I've got the blessing of u/ZorbaTHut to post this here contingent on explaining why Urbit is interesting, both in general and for this audience, so I'll give you a brief outline of the project if you're not familiar, and answer questions you may have once I'm home from work on Monday (though I encourage anybody else who'd like to to chime in until then -- I have to go to bed soon.)

What is Urbit?

Urbit is an interenet decentralization project, and a full networked computing stack from the ground up. Urbit's ultimate goal is to build a new internet on top of the old one, that is architecturally designed to avoid the need for centralized services by allowing individuals to run and program robust personal servers that are simple to manage. When Urbit conquers the world, your digital identity will be something you personally permanently own as a cryptographic key, not an line in a corporation's database; Facebook and Twitter will be protocols -- encrypted traffic and data shared directly between you and your friends & family, with no middlemen spying on you; your apps, social software and anything you program will have secure cryptocurrency payment mechanisms as a system call, payed out of a wallet on a device you fully control; and you will tangibly own and control your computer and the networked software you use on it.
As I said, Urbit is a stack; at its core is Nock, a minimal, turing-complete function. Nock is built out into a deterministic operating system, Arvo, with its own functional programming language. For now, Arvo runs as a process, with a custom VM/interpreter on *nix machines. Your Arvo instance talks to other instances over a native, encrypted peer-to-peer network, though it can interface with the normal internet as well. Urbit's identity management system is called Azimuth, a public key infrastructure built on Ethereum. You own proof of your Urbit instance's identity as a token in the same way you own your Bitcoin wallet.
Because the peer-to-peer network is built into Arvo, you get it 'for free' with any software you write or run on it. You run your own personal server, and run all the software you use to communicate with the world yourself. Because all of your services are running on computer you control using a single secure identity system, you can think of what it aspires to like a decentralized, cypherpunk version of WeChat -- a programmable, secure platform for everything you want to do with your computer in one place, without the downsides of other people running your software.

Why is it interesting?

Urbit is extremely ambitious and pretty strange. Why throw out the entire stack we've spent half a century building? Because it's a giant ball of mud -- millions of lines of code in the Linux kernel alone, with all the attendant security issues and complexity. You can run a personal server today if you're technically sophisticated; spin up a VPS, install all the software you need, configure everything and keep it secure. It's doable, but it sucks, and your mom can't do it. Urbit is designed from the beginning to avoid the pitfalls that led to cascading system complexity. Nock has 12 opcodes, and Arvo is somewhere in the neighborhood of 30,000 lines of code. The core pieces of Urbit are also ticking towards being 'frozen' -- reaching a state where they can no longer be changed, in order to ensure that they remain absolutely minimal. The point of all of this is to make a diamond-hard, unchanging core that a single person can actually understand in its entirety, ensure the security of the architecture, prevent insane dependency hell and leaky abstractions from overgrowing it, and allow for software you write today to run in a century. It also aims to be simple enough that a normal person can pay a commodity provider $5/mo (or something), log into their Urbit on their devices, and control it as easily as their phone.
Urbit's network also has a routing hierarchy that is important to understand; while the total address space is 128-bit, the addresses are partitioned into different classes. 8-bit and 16-bit addresses act as network infrastructure, while human instances use 32-bit addresses. To use the network, you must be sponsored by the 16-bit node 'above' you -- which is to say 'be on good terms'. If you aren't on good terms, that sponsorship can be terminated, but that goes both ways -- if you don't like your sponsor, you can exit and choose another. Because 32-bit addresses are finite, they're scarce and have value, which disincentivizes spam and abuse. To be clear, the sponsor nodes only sign/deliver software updates, and perform peer discovery and NAT traversal; your connections with other people are direct and encrypted. Because there are many sponsor nodes, you can return to the network if you're kicked off unfairly. In the long term, this also allows for graceful political fragmentation of the network if necessary.
The world created by Urbit is a world where individuals control their own data and digital communities live according to their mores. It's an internet that isn't funded by mass automated surveillance and ad companies that know your health problems. It's also the internet as a frontier like it once was, at least until this one is settled. Apologies if this comes off a little true-believer-y, but this project is something I'm genuinely excited about.

For TheMotte

The world that Urbit aims to build is one not dissimilar from Scott's archipelago communism -- one of voluntaristic relations and communities, and exit in the face of conflict & coercion. It's technical infrastructure to move the internet away from the chokepoints of the major social media platforms and the concentration of political power that comes with centralized services. The seismic shifts affecting our institutions and society caused by the internet in the last decade have been commented on at length here and elsewhere, but as BTO said, you ain't seen nothin' yet. I suspect many people with a libertarian or anti-authoritarian bent would appreciate the principle of individual sovereignty over their computing and data. The project is also something I've discussed a few times with others on here, so I know there's some curiosity about it.
The original developer of Urbit is also rather well known online, especially around here. Yarvin is a pretty controversial figure, but he departed the project in early 2019.

Meetup

There's a lot more that I haven't mentioned, but I hope this has piqued your interest. If you're in DFW, you can find details of the first meetup here. There will be free pizza and a presentation about Urbit, help installing & using it (Mac & Linux only for now), as well as the opportunity to socialize. All are welcome! Feel free to bring a friend.
If you're not in North Texas but are interested, there are also other regional meetups all over the world coming up soon.

Further reading:

submitted by p3on to TheMotte [link] [comments]

How to Create Your Own Cryptocurrency Using Python 2020

A blockchain is a public database that irreversibly documents and authenticates the possession and transmission of digital assets. Digital currencies, like Bitcoin and Ethereum, are based on this concept. Blockchain is an exciting technology that you can use to transform the capabilities of your applications.
Of late, we’ve been seeing governments, organizations, and individuals using the blockchain technology to create their own cryptocurrencies—and avoid being left behind. Notably, when Facebook proposed its own cryptocurrency, called Libra, the announcement stirred many waters across the world.

What if you could also follow suit and create your own version of a cryptocurrency?

I thought about this and decided to develop an algorithm that creates a crypto.
I decided to call the cryptocurrency fccCoin.
In this tutorial, I’m going to illustrate the step-by-step process I used to build the digital currency (I used the object-oriented concepts of the Python programming language).
Here is the basic blueprint of the blockchain algorithm for creating the fccCoin:
class Block: def __init__(): #first block class pass def calculate_hash(): #calculates the cryptographic hash of every block class BlockChain: def __init__(self): # constructor method pass def construct_genesis(self): # constructs the initial block pass def construct_block(self, proof_no, prev_hash): # constructs a new block and adds it to the chain pass u/staticmethod def check_validity(): # checks whether the blockchain is valid pass def new_data(self, sender, recipient, quantity): # adds a new transaction to the data of the transactions pass u/staticmethod def construct_proof_of_work(prev_proof): # protects the blockchain from attack pass u/property def last_block(self): # returns the last block in the chain return self.chain[-1]
Now, let me explain what is taking place…
1. Building the first Block class A blockchain comprises of several blocks that are joined to each other (that sounds familiar, right?).
The chaining of blocks takes place such that if one block is tampered with, the rest of the chain becomes invalid.
In applying the above concept, I created the following initial block class
import hashlib import time class Block: def __init__(self, index, proof_no, prev_hash, data, timestamp=None): self.index = index self.proof_no = proof_no self.prev_hash = prev_hash self.data = data self.timestamp = timestamp or time.time() u/property def calculate_hash(self): block_of_string = “{}{}{}{}{}”.format(self.index, self.proof_no, self.prev_hash, self.data, self.timestamp) return hashlib.sha256(block_of_string.encode()).hexdigest() def __repr__(self): return “{} – {} – {} – {} – {}”.format(self.index, self.proof_no, self.prev_hash, self.data, self.timestamp)
As you can see from the code above, I defined the __init__() function, which will be executed when the Block class is being initiated, just like in any other Python class.
I provided the following parameters to the initiation function:
self—this refers to the instance of the Block class, making it possible to access the methods and attributes associated with the class; index—this keeps track of the position of the block within the blockchain; proof_no—this is the number produced during the creation of a new block (called mining); prev_hash—this refers to the hash of the previous block within the chain; data—this gives a record of all transactions completed, such as the quantity bought; timestamp—this places a timestamp for the transactions. The second method in the class, calculate_hash, will generate the hash of the blocks using the above values. The SHA-256 module is imported into the project to assist in obtaining the hashes of the blocks.
After the values have been inputted into the cryptographic hash algorithm, the function will return a 256-bit string representing the contents of the block.
This is how security is achieved in blockchains—every block will have a hash and that hash will rely on the hash of the previous block.
As such, if someone tries to compromise any block in the chain, the other blocks will have invalid hashes, leading to disruption of the entire blockchain network.
Ultimately, a block will look like this:
{ “index”: 2, “proof”: 21, “prev_hash”: “6e27587e8a27d6fe376d4fd9b4edc96c8890346579e5cbf558252b24a8257823”, “transactions”: [ {‘sender’: ‘0’, ‘recipient’: ‘Quincy Larson’, ‘quantity’: 1} ], “timestamp”: 1521646442.4096143 }
2. Building the Blockchain class The main idea of a blockchain, just as the name implies, involves “chaining” several blocks to one another.
Therefore, I’m going to construct a Blockchain class that will be useful in managing the workings of the whole chain. This is where most of the action is going to take place.
The Blockchain class will have various helper methods for completing various tasks in the blockchain.
Let me explain the role of each of the methods in the class.
a. Constructor method This method ensures the blockchain is instantiated.
class BlockChain: def __init__(self): self.chain = [] self.current_data = [] self.nodes = set() self.construct_genesis()
Here are the roles of its attributes:
b. Constructing the genesis block The blockchain requires a construct_genesis method to build the initial block in the chain. In the blockchain convention, this block is special because it symbolizes the start of the blockchain.
In this case, let’s construct it by simply passing some default values to the construct_block method.
I gave both proof_no and prev_hash a value of zero, although you can provide any value you want.
def construct_genesis(self): self.construct_block(proof_no=0, prev_hash=0) def construct_block(self, proof_no, prev_hash): block = Block( index=len(self.chain), proof_no=proof_no, prev_hash=prev_hash, data=self.current_data) self.current_data = [] self.chain.append(block) return block
c. Constructing new blocks
The construct_block method is used for creating new blocks in the blockchain.
Here is what is taking place with the various attributes of this method:
d. Checking validity
The check_validity method is important in assessing the integrity of the blockchain and ensuring anomalies are absent.
As mentioned earlier, hashes are essential for the security of the blockchain as even the slightest change in the object will lead to the generation of a completely new hash.
Therefore, this check_validity method uses if statements to check whether the hash of every block is correct.
It also verifies if every block points to the right previous block, through comparing the value of their hashes. If everything is correct, it returns true; otherwise, it returns false.
u/staticmethod def check_validity(block, prev_block): if prev_block.index + 1 != block.index: return False elif prev_block.calculate_hash != block.prev_hash: return False elif not BlockChain.verifying_proof(block.proof_no, prev_block.proof_no): return False elif block.timestamp <= prev_block.timestamp: return False return True
e. Adding data of transactions
The new_data method is used for adding the data of transactions to a block. It’s a very simple method: it accepts three parameters (sender’s details, receiver’s details, and quantity) and append the transaction data to self.current_data list.
Anytime a new block is created, this list is allocated to that block and reset once more as explained in the construct_block method.
Once the transaction data has been added to the list, the index of the next block to be created is returned.
This index is calculated by adding 1 to the index of the current block (which is the last in the blockchain). The data will assist a user in submitting the transaction in future.
def new_data(self, sender, recipient, quantity): self.current_data.append({ ‘sender’: sender, ‘recipient’: recipient, ‘quantity’: quantity }) return True
f. Adding proof of work
Proof of work is a concept that prevents the blockchain from abuse. Simply, its objective is to identify a number that solves a problem after a certain amount of computing work is done.
If the difficulty level of identifying the number is high, it discourages spamming and tampering with the blockchain.
In this case, we’ll use a simple algorithm that discourages people from mining blocks or creating blocks easily.
u/staticmethod def proof_of_work(last_proof): ”’this simple algorithm identifies a number f’ such that hash(ff’) contain 4 leading zeroes f is the previous f’ f’ is the new proof ”’ proof_no = 0 while BlockChain.verifying_proof(proof_no, last_proof) is False: proof_no += 1 return proof_no u/staticmethod def verifying_proof(last_proof, proof): #verifying the proof: does hash(last_proof, proof) contain 4 leading zeroes? guess = f'{last_proof}{proof}’.encode() guess_hash = hashlib.sha256(guess).hexdigest() return guess_hash[:4] == “0000”
g. Getting the last block
Lastly, the latest_block method is a helper method that assists in obtaining the last block in the blockchain. Remember that the last block is actually the current block in the chain.
u/property def latest_block(self): return self.chain[-1]
Let’s sum everything together
Here is the entire code for creating the fccCoin cryptocurrency.
You can also get the code on this GitHub repository.
import hashlib import time class Block: def __init__(self, index, proof_no, prev_hash, data, timestamp=None): self.index = index self.proof_no = proof_no self.prev_hash = prev_hash self.data = data self.timestamp = timestamp or time.time() u/property def calculate_hash(self): block_of_string = “{}{}{}{}{}”.format(self.index, self.proof_no, self.prev_hash, self.data, self.timestamp) return hashlib.sha256(block_of_string.encode()).hexdigest() def __repr__(self): return “{} – {} – {} – {} – {}”.format(self.index, self.proof_no, self.prev_hash, self.data, self.timestamp) class BlockChain: def __init__(self): self.chain = [] self.current_data = [] self.nodes = set() self.construct_genesis() def construct_genesis(self): self.construct_block(proof_no=0, prev_hash=0) def construct_block(self, proof_no, prev_hash): block = Block( index=len(self.chain), proof_no=proof_no, prev_hash=prev_hash, data=self.current_data) self.current_data = [] self.chain.append(block) return block u/staticmethod def check_validity(block, prev_block): if prev_block.index + 1 != block.index: return False elif prev_block.calculate_hash != block.prev_hash: return False elif not BlockChain.verifying_proof(block.proof_no, prev_block.proof_no): return False elif block.timestamp <= prev_block.timestamp: return False return True def new_data(self, sender, recipient, quantity): self.current_data.append({ ‘sender’: sender, ‘recipient’: recipient, ‘quantity’: quantity }) return True u/staticmethod def proof_of_work(last_proof): ”’this simple algorithm identifies a number f’ such that hash(ff’) contain 4 leading zeroes f is the previous f’ f’ is the new proof ”’ proof_no = 0 while BlockChain.verifying_proof(proof_no, last_proof) is False: proof_no += 1 return proof_no u/staticmethod def verifying_proof(last_proof, proof): #verifying the proof: does hash(last_proof, proof) contain 4 leading zeroes? guess = f'{last_proof}{proof}’.encode() guess_hash = hashlib.sha256(guess).hexdigest() return guess_hash[:4] == “0000” u/property def latest_block(self): return self.chain[-1] def block_mining(self, details_miner): self.new_data( sender=”0″, #it implies that this node has created a new block receiver=details_miner, quantity= 1, #creating a new block (or identifying the proof number) is awarded with 1 ) last_block = self.latest_block last_proof_no = last_block.proof_no proof_no = self.proof_of_work(last_proof_no) last_hash = last_block.calculate_hash block = self.construct_block(proof_no, last_hash) return vars(block) def create_node(self, address): self.nodes.add(address) return True u/staticmethod def obtain_block_object(block_data): #obtains block object from the block data return Block( block_data[‘index’], block_data[‘proof_no’], block_data[‘prev_hash’], block_data[‘data’], timestamp=block_data[‘timestamp’])
Now, let’s test our code to see if it works.
blockchain = BlockChain() print(“***Mining fccCoin about to start***”) print(blockchain.chain) last_block = blockchain.latest_block last_proof_no = last_block.proof_no proof_no = blockchain.proof_of_work(last_proof_no) blockchain.new_data( sender=”0″, #it implies that this node has created a new block recipient=”Quincy Larson”, #let’s send Quincy some coins! quantity= 1, #creating a new block (or identifying the proof number) is awarded with 1 ) last_hash = last_block.calculate_hash block = blockchain.construct_block(proof_no, last_hash) print(“***Mining fccCoin has been successful***”) print(blockchain.chain)
It worked!
Here is the output of the mining process:
***Mining fccCoin about to start*** [0 – 0 – 0 – [] – 1566930640.2707076] ***Mining fccCoin has been successful*** [0 – 0 – 0 – [] – 1566930640.2707076, 1 – 88914 – a8d45cb77cddeac750a9439d629f394da442672e56edfe05827b5e41f4ba0138 – [{‘sender’: ‘0’, ‘recipient’: ‘Quincy Larson’, ‘quantity’: 1}] – 1566930640.5363243]
Conclusion
There you have it!
That’s how you could create your own blockchain using Python.
Let me say that this tutorial just demonstrates the basic concepts for getting your feet wet in the innovative blockchain technology.
If this coin were deployed as-is, it could not meet the present market demands for a stable, secure, and easy-to-use cryptocurrency.
Therefore, it can still be improved by adding additional features to enhance its capabilities for mining and sending financial transactions.
Nonetheless, it’s a good starting point if you decide to make your name known in the amazing world of cryptos.
If you have any comments or questions, please post them below.
Happy (crypto) coding!
Source: Cryptoors
submitted by djkloud to CryptoTechnology [link] [comments]

Does Privacy Coin will be mainstream in the 2020’s?

Does Privacy Coin will be mainstream in the 2020’s?

https://preview.redd.it/dtecp9rwixu41.jpg?width=4840&format=pjpg&auto=webp&s=73fb2ff0135241cd7fe4fddd993f01a27c2a38c7
Since the introduction of bitcoin, thousands of other cryptocurrencies have been brought to the market. Dozens of these are considered “Privacy Coins” because they use advanced and intentional methods to protect the privacy of their users further. They go over and above the security features used within the Bitcoin Network.
However, Bitcoin is not a privacy coin
From the beginning, the creator(s) of bitcoin intended it to be a privacy coin to keep user information protected. But because of the open ledger technology used in cryptocurrencies, tracking transactional data could and still can be relatively easy. For example, when someone wants to spy and track transactions, they may set up spy nodes that attempt to triangulate data.
https://preview.redd.it/m0d71wc2jxu41.jpg?width=740&format=pjpg&auto=webp&s=24f6266299c0f09e88042bdb30e2d84048979a77
Despite identifying wallets via alphanumeric (consisting of or using both letters and numerals) codes rather than real names, bitcoin isn’t anonymous. Because the blockchain keeps an immutable record of every single fraction of bitcoin moved in and out of these wallets, it’s surprisingly easy to trace the flow of bitcoin from one wallet to another.
Transactional data on ledgers like the Bitcoin Blockchain is open and public. It means they show the date, amount, and receiving and sending wallet addresses. Anyone using the network can see this information. If a crypto user wants additional layers of privacy, they can go to extra lengths to get them. Adding privacy is possible in a variety of ways, including the use of a Privacy Coin.
A recent report from the Massachusetts Institute of Technology (MIT) confirms the need for privacy for a digital monetary system.
It’s precisely for this reason that a new breed of cryptocurrencies — privacy coins — have been emerging since 2014. As the name implies, these aim to offer greater anonymity than the likes of bitcoin and ethereum. It’s becoming apparent that privacy-coin features will be vital if cryptocurrencies are to be widely adopted in the future.
There are at least 30 privacy coins, with most of them aiming for privacy through a variety of different measures.
https://preview.redd.it/wrut0gb6jxu41.jpg?width=1600&format=pjpg&auto=webp&s=0a07a945d6cccde6f112bb531b5a6c97f3001353
Monero(XMR): Two methods to conceal identities
The most well known is Monero (XMR), which was launched in April 2014 and which uses two methods to conceal identities: confidential ring transactions (RingCTs) and stealth addresses.
Simply put, the use of RingCTs allows the Monero blockchain to verify transactions without revealing how much was transacted and who transacting parties are. As for stealth addresses, these involve a recipient of an XMR payment receiving her new funds at a one-time, randomly generated ‘stealth’ address, which isn’t linked to her usual account.
However, Monero’s privacy algorithm has a potential vulnerability that makes it possible for researchers to be able to trace around 80% of Monero transactions, recent paper states.
https://preview.redd.it/4mvghtw8jxu41.png?width=1920&format=png&auto=webp&s=46a11f249028492d45fa64822c097b0cff865a5c
Verge(XVG): Anonymises users via the Tor network
Another popular privacy coin that uses a different approach to anonymity but nonetheless encounters comparable problems is Verge (XVG). It anonymizes users by hiding their IP addresses via the Tor network.
The problem is, while this makes linking a particular wallet to a real-world identity more complicated, the fact that the blockchain and its transactions remain transparent still permits wallets to be identified — and valued — via careful detective work.
https://preview.redd.it/6g70z3tajxu41.png?width=1270&format=png&auto=webp&s=1e892c10ee3cfaf2dae682f1f09c8c6f46aebebe
Celare: First full-asset cross-chain and anonymous solution
Such features of privacy coins will be of paramount importance if any cryptocurrencies are to be used as currency on a mass scale. Even though some of the above coins have certain weak spots, they’re continuously improved, while newer privacy coins (e.g., Celare) are emerging all the time. And far from being an attempt by developers to make crypto even ‘shadier’ than it’s sometimes perceived to be, privacy coins are, on the contrary, another critical step in bringing crypto a bit closer to the mainstream.
Fungibility is something that other privacy coins strive for, but with mixed results. Celare achieves privacy via a process known as “zk-SNARK” (zero-knowledge, Succinct Non-Interactive Argument of Knowledge). Similar to RingCTs, this proves that a transaction is valid without recording any other information about it (such as amounts and addresses).
Celare, a parallel chain of smart privacy contracts in the Polkadot ecosystem, is developed based on Substrate. By selecting the BLS12–381 curve to achieve zero-knowledge proof, Celare indeed implements the blockchain system with the privacy protection of Turing-complete smart contracts.
It bridges the connectivity between different projects and ensures the privacy of the project and assets safety, better to create ecological consensus.
Compared with the existing Blockchain privacy protection technology, Celare not only realizes the privacy protection of account information and transaction but also recognizes the cross-chain ecosystem.
It is a secure, anonymous channel that breaks the Internet blockade and does not require a VPN, to protect user privacy and security for the entire Celare ecosystem.
The so-called anonymity is not only the authentication without personal identity information, but also the hidden high-anonymity Celare of the communication channel uses distributed nodes to support the entire network operation.
Not only that, in the process of using covert chat, but no third party stores the message content, and the chat content will also be stored in the local file. The master node is only responsible for providing network transmission and content delivery.
Based on anonymous peer-to-peer chat, Celare users and groups in the community can independently launch OTC (over-the-counter transaction).
Celare will be evolved and absorbed in the Celare development process, to realize plenty of the stack ecology applications, such as Parity Substrate, Wasm, DAO, Treasury.
https://preview.redd.it/fd02yiidjxu41.jpg?width=1000&format=pjpg&auto=webp&s=2de0ba384f7a4d3f38f9d6da5ade8000ef979e4b
Brian Armstrong, the CEO of Coinbase, has stated in a recent blog post that there will be a need for privacy features on blockchains in this decade.
According to him, this is besides scalability the most crucial aspect for the coming years to achieve widespread acceptance. Armstrong predicts that blockchains “will reach about 1 billion users by the end of the decade”.
The Bitcoin Network is continuously developing and implementing additional privacy layers to deal with the challenges of open ledgers. The only sure thing is that in the next few years, the privacy coin realm will be fascinating.
Join Us at Celare Community today to stay up to date with all the latest crypto happenings and news.
Contact Us:
Twitter: @CelareCommunity
Telegram:t.me/celarecommunity_en
Reddit:u/Celarecommunity
GitHub:Celaregithub
submitted by Celarecommunity to u/Celarecommunity [link] [comments]

How I Got Paid By 65 Different Beermoney Programs in 2018 [Guide]

How I Got Paid By 65 Different Beermoney Programs in 2018

Hi! Welcome to my guide for everything that paid me in 2018. Before I begin, here are a few details:
Now, let’s get into the good stuff.

1. Quickthoughts - $590

This was my top earner for the year and it only took me up until September to earn this amount. I had to stop because they require a W9 for anything over $600 and I was too lazy to file that. It is pretty similar to a traditional survey router, but I seem to have much better luck with not disqualifying here. I get paid $1 per survey but some people earn $2 per survey based on their demographics. Some people have issues with bans and getting locked out of accounts, so it is not for everyone. Because of this, it is important to cash out the minute you hit the cashout minimum of $10. There are both android and iOS apps but I highly recommend using android if possible because the iOS app pays in iTunes gift cards and the android app pays in Amazon gift cards. Overall, Quickthoughts is great if you are one of the lucky ones without account issues.

2. CrowdTap - $270

This is one of my favorite beermoney programs of all time. You complete a variety of very short polls and questions about consumer goods, food products, and services. The polls pay 1.5 cents each and the short answer questions pay 10 cents each. There are other ways that they ask questions, including longer surveys that are a combination between the polls and questions. All of them are well worth it for the time that they take. Reward options include Amazon, Target, Walmart, Steam, Xbox, and more. You can cash out starting at $5 and I am able to cash out about once a week. Definitely add this one to your routine if you have not yet.

3. Prolific Academic - $197.95

This one is great. Take academic surveys for universities and researchers and get paid in cash. As long as you don’t miss attention checks you won’t get disqualified. Some people get multiple surveys a day and others get only a few a week based on demographics. Many pay at least minimum wage. I could have made a lot more on here if I tried. Universally regarded as one of the most “worth it” survey sites so give it a shot!

4. Pinecone Research - $138 + Ranch Dip and Dog Chews

Pinecone pays a guaranteed $3 for 10-15 min surveys regarding opinions on new products. They also send free samples sometimes! You can cash out for a variety of gift cards or PayPal. I get about 1 survey a week on average. Pinecone is invite only so look for invites to sign up on other GPT sites as sometimes you can find them there. If you get in it is some of the best money you can make with surveys for the time you spend on it.

5. Branded Surveys - $130

Branded Surveys has traditional router surveys. A major perk of using Branded used to be their generous daily login bonus. This has been reduced to 5 cents a day, so it might not be worth using this site for the login bonus alone anymore. They have a very high EngageMe rate at one cent per 3 videos if that’s your thing as well! Payouts start at $10 via Paypal and Amazon.

6. Nicequest - $120

Big fan of this one. Their surveys have guaranteed rewards even if you screen out and can pay up to $2-3 for like 10-15 minutes. Their currency is “shells” and each shell converts to about 7 cents. Installing their meter on your devices adds a guaranteed 5 shells per survey. If you add it to your computer, phone, and tablet you get an extra 15 shells (about a dollar) per survey. I just have it on my computer so I get 5 bonus shells. Cashouts are quick for e-gift cards and they also offer physical items. Saving up for larger gift cards typically gives you better rates.

7. PrizeRebel - $107

PrizeRebel is your typical GPT site with a variety of ways to earn, but it is most well-known for surveys. They pay $0.80 per survey on the YourSurvey router and that is where a majority of my earnings have come. Lots of cashout options starting at $2.

8. YouGov - $100

YouGov is a survey site/app that pays anywhere from $0.50 to $2 per survey. The best part of it is that you never disqualify. I get a couple surveys a week. Most of the surveys are about public policy, politics, or general opinions of companies. You get the best value for your points if you save up for the $100 cash out. They offer the $100 cash out in bank transfer and Amazon. The Amazon gift card option used to be a physical mailed card but now its an e-gift card so that makes it even better! They offer other gift cards but they are for smaller values at worse rates so I would avoid them. Available online, on android, and on iOS.

9. iMoney - $89

Get paid to download apps! The best thing about iMoney is that the apps always credit and you can get credit for apps you have downloaded before. That’s not the case on most paid-to-download apps. Earn 15-30 cents per app and there are 3-4 new apps available each day. They offer Amazon and PayPal but PayPal has a small fee. Added this towards the end of the year and hope to make more next year. Might not be in the app store at the moment? Couldn’t find a link to put in the title.

10. VeryDice - $65

Roll dice, get points, redeem for physical items and e-gift cards. I get the daily spin rolls every day and watch their ads for more rolls. The key to VeryDice is saving up approximately 100 rolls before rolling to have enough to get the daily doubles bonus of $0.30. Worth keeping on your phone even if it’s just for the daily spin rolls. Available on both iOS and Andoid. If you want to enter my ref code at sign up you’ll get 30 free rolls :). It is 1319422.

11. Forthright - $62

Sign up and receive invitations to surveys via email. Don’t do their “partner surveys”, they rarely credit and you can get stuck in an endless loop. Their non-partner surveys are awesome. They pay well for the time spent but they also have one of the best disqualification bonusses I have ever seen. Every three surveys you take, regardless of whether you disqualify or not, you get a $2 bonus. That is $0.66 per survey on top of its base pay regardless of whether you qualify or not. They pay instantly with PayPal, Amazon, or Bitcoin.

12. VolKno - $55

Do you like movies? Then this one’s for you. Watch, rate, and tag movie trailers to earn Amazon gift cards. Each trailer has three stages and after completing all three you will make 23.5 cents per trailer. One thing to keep in mind is that you need a physical verification card sent to a US address in order to activate your account. I completed basically every trailer that was posted over the year, so my earnings are a good estimate of what you can plan on earning.

13. Inbox Dollars - $52.03

A pretty shit GPT site with a high minimum cash out. Not sure how I ever hit the minimum cash out here. Would not recommend.

14. Zap Surveys (Ref for $0.75 bonus) - $52.03

There are three main ways to earn here: a 3 cent daily login bonus, 7 cent location rewards for opening the app when a notification appears, and surveys. If you’re going to do surveys on here do relatively short TapResearch ones. The location rewards alone are why I use this app. The one negative of this app is that the cash out minimum is $25. Definitely worth having on your phone!

15. PointClub - $50

This is a pretty normal survey site. They have a daily login streak bonus that can double the value of your surveys when you reach the max streak which can make a lot of them worth your time. I stopped receiving surveys, so I assume I’m banned? So be careful with this one. Cash out minimums are $25 which is higher than I would like.

16. Survey Monkey Rewards - $49.15

Another one of my favorites. Survey Monkey Rewards is a survey app created by Survey Monkey, a big name in survey development software. Surveys all take under 3-4 minutes and pay either 25 or 35 cents based on length. I almost never disqualify, and you can cash out instantly to Amazon starting at $5. Available on Android and iOS.

17. Earn.com - $71.31

Earn.com lets people pay Bitcoin to contact you. I mostly received BTC to sign up for ICOs and airdrops for random tokens. They were aquired by Coinbase so there are changes to the program. They require a LinkedIn to make an account now as well (I think). If you can get into the program still it is pretty great!

18. MyPoints - $45

This is a sister-site to Swagbucks. I have decent success with their surveys so I use it for that. They have some other ways to earn but I don’t use them. If you have the same success with their surveys it might be worth using.

19. MicroWorkers - $44.16

Basically a smaller and sketchier MTurk. Lots of short tasks with decent earning potential but you have to find the right type of tasks for you. I did the click, search tasks for a while. There is PayPal with a $9 minimum but if I remember right they mail you a physical card with a pin before you can cash out to verify your identity. Not for everyone but worth a look.

20. SurveysOnTheGo - $43.30

This one is pretty simple. Get surveys on your phone, and redeem for Amazon, Visa, PayPal, and Starbucks! Surveys range from $0.50-$10. Some are location based and involve in-store activities. The more involved the surveys are, the more they pay. Don’t expect a ton of surveys, but many of them are worth your time. Available on Android and iOS. Minimum cash out is $10.

21. Survey Junkie - $40

This survey site is average at best. I am having less success with them recently because I can’t be bothered to take a 20 minute survey for $0.90. The one benefit of this site is that they have a VERY small disqualification bonus. Some people do have success taking surveys on here and the cash out minimum is $10.

22. E-Poll - $35

Another survey provider with no disqualifications! Woohoo! You receive email notifications when you have a new survey. Surveys pay $0.50-$2 and are usually not too long. They pay via a points system and you get better rates if you save up for the higher rewards. I cash out for Amazon, and they can take a long time to deliver rewards so be patient.

23. MooCash - $33.60

MooCash pays you to download apps and then open them for 3 days once a day. I have gotten paid as much as $2 for a single app download. They don’t always credit super easily so I would only try the better paying ones. You can cash out for BTC, Amazon, PayPal, and more. You can use my ref code (EHNPNC) when you sign up for some free coins. I think it’s only available to the first 20 people.

24. InstaGC - $33

This is a pretty basic and easy to use GPT site. Very low cashout minimums with lots of options. Check out LiveSample and YourSurveys for a good place to start on surveys.

25. PaidViewpoint (Ref) - $32.65

Short surveys with minimum PayPal cashout of $15. There are short surveys to collect demographic information that pay 10 cents. If you qualify for any of the longer surveys they can pay as much as $1.50. Surveys can be sporadic so just check the site once a day. Worth the time it takes to put into it.

26. UserCrowd (UsabilityHub) - $32.40

UsabilityHub, now rebranded to UserCrowd, pays you to give feedback on websites and products. Each task pays anywhere from 10-50 cents and the minimum cash out is $10. UserCrowd is nice because unlike other usability testing sites you don’t need to record your voice or screen. I leave it in a pinned tab on Chrome and get notifications when there is a new task. They can vary in how often you get them. I enjoy this one, give it a shot.

27. OnePulse - $30

This app has very short surveys with guaranteed rewards. You never disqualify or anything like that. I get a notification that I have a new paid survey about once a week. Surveys pay 30 cents to start but as you “level up” they become worth slightly more. Right now mine are worth 34 cents. Cashout is at $5 via PayPal. Available on iOS and Android.

28. Watchback - $30

This is the best sweepstakes app I have used. You get entries into the sweepstakes by watching videos. Each video is an entry. I watch 10 videos a day and usually win either $0.50 or $1 each day. It pays via Perk points so it’s a nice supplement to your Perk routine. If this keeps being so easy to win I should make a lot more with it next year! Available on Android and iOS.

29. Dabbl - $30

I started using Dabbl towards the very end of the year. They offer short brand-sponsored polls and videos that pay anywhere from 5-20 cents. These are super infrequent and cashing out from these alone would take the better part of a year. Where I earn with Dabbl is their non-passive ads. You get paid 1 cent per ad so I run them when I’m doing other things. It adds up. They don’t offer Amazon so I cash out for Target. Cash outs are at $5. iOS and Android.

30. Gravy - $25

This is a pretty fun game show app. To summarize the game, you pick a percentage that you think a product will sell out at, and if you’re within the closest few people to the right percentage you win a decent little chunk of cash. I’ve won once. You can buy discounted products on here as well. Go check it out, it’s pretty addicting. My ref code is “Leeves” if you want to throw some bonus guesses my way :).

31. KinIt - $25

Take short polls and quizzes and get paid 6-25 cents a day. The unfortunate thing about KinIt is that they very rarely have their gift cards in stock. When they have them in stock they have a decent selection. Still worth your time in my opinion. iOS and Android are supported.

32. Life Fun and Everything - $25

This was an invite-only survey panel that gives me a $2 survey once a month. Found it on some GPT site.

33. Panel - $25

Install Panel on your phone and get paid for sharing your location data. They drastically reduced their pay rate recently so I’m not sure it’s worth it anymore. Previously you could expect to make about $25 a year.

34. Perksy (Ref) - $25

Short polls that pay anywhere from $0.50 to $1. I get about one a week. Only downside is that the minimum cash out is $25. Various gift cards (including Amazon) are available. Definitely worth keeping on your phone. I think it’s iOS only at this time.

35. Swagbucks - $25

One of the easiest GPT sites to use. Lots of offer walls and surveys. I don’t make a lot here but basically just do daily search, daily poll, Swago, and SwagIQ. If I wasn’t banned from their surveys for some reason I might make a little more. I use swagbucks from time to time to find easy offers to do. Overall, a decent place to start of you’re experimenting with beermoney for the first time.

36. Survey Mini- $25

This app uses your location data and pays you 10 cents (sometimes more) to fill out a short poll about stores and restaurants that you go to. They recently added e-gift cards instead of physical cards so that makes it a lot more attractive to use! iOS and Android.

37. IBotta - $20

This is one of the better apps that give you rebates on select grocery items as you shop in-store. If you buy a lot of groceries, there is money to be made here. They also have traditional online cashback portals and offers.

38. Streetbees - $19

This app has surveys with a more personal and fun spin. You get paid via PayPal for each task that you finish. There aren’t always tasks available but when there are, they often pay well. I had one for testing an app that paid $9! It’s a nice option for something a little different than traditional surveys.

39. AttaPoll - $15.29

Attapoll is a survey app that sends you more traditional router surveys (many of which are Cint surveys). You might disqualify quite a bit here depending on your demographic so I stick to the short ones. Payouts are via PayPal, Bitcoin, and Ethereum. PayPal starts at $3 (nice), ETH at $3.50, and BTC at an insane $100. On both Android and iOS.

40. Smores - $15

Smores is an Android lock screen app that pays a flat $0.10 a day for unlocking your device once. Their non-passive video section pays a cent per 2 videos at the moment so that can be a decent earner as well. Cash out as low as $1 for Amazon and other gift cards. I was pretty inconsistent in my daily unlocks this year and hope to increase my earnings next year.

41. Crowdology - $10.04

Very straight forward. Do surveys, get paid. Some people have success with this type of site, and others disqualify a lot. I would stick to any surveys under 10 minutes in length to avoid wasting your time. Cash out for Amazon or PayPal at $10.

42. Achievement - $10

This app pays you based on your steps. I have it connected to Apple Health. It took me about 9 months to earn $10 and I am pretty active. Android and iOS are both supported. Doesn’t run in the background or drain my battery from what I can tell so it’s very passive and harmless.

43. Gamermine (Ref code for $1 bonus) - $10

This is a GPT site with a few offer walls. They have good EngageMe rates as well as a 5 cent daily bonus as long as you’re making a dollar a week on offers on the site. This is basically the only truly passive income that I have made this year from running EngageMe.

44. Cross Media Panel - $10

This is a program through Google that paid you to let them have an extension on your browser and on your phone. They discontinued most of this program so I am no longer earning from them. Parts of this program still exist but I haven’t looked into it much. Probably just worth skipping over at this point.

45. Lifetap - $10

This app is just a garbage survey router now. It used to have some other short guaranteed-pay surveys. I wouldn’t mess with this anymore.

46. PayTime - $9.99

Paytime lets you earn money for your subscriptions by watching ads and answering a few questions about them. You can only cash out once a month because it is supposed to be used for monthly subscriptions. All they do is send you $9.99 via PayPal or Venmo once you watch 40 ads. The catch with PayTime is that you need to be a student at one of the universities that they support. Check their website for the list. Overall, if you are a student it could be an easy $10 a month. Hope to use this more next year.

47. Ready Games - $9.19

Get paid to play games! There is a new game every 48 hours and the top 20% of scores at the end of the time period get paid. The top player makes $7 and the payout decreases as you go down the ranks. I have won somewhere around $2.50 every game that I have made it into the top 20%. Pays via PayPal when you win. On Android and iOS. You can use share code “lucky-disk-68” if you want to give me some extra lives :).

48. Carepoynt - $7

This is a pretty bad healthy living/rewards site. I think they had a few easy ways to earn, like downloading their app, and that’s how I cashed out. There was a post about it so be looking for opportunities like these on the subreddit. I won’t be using this again.

49. Amazon Shipping History Task - $6

Look for tasks like this that get posted on the subreddit. Got paid to submit some shipping data from Amazon.

50. DailyWin - $6

This used to be a scratch card app with a non-passive video section but it seems to be dead. Move along, nothing to see here.

51. CitizenMe - $5.97

Take short polls. Get instantly paid small amounts of money via Paypal. Pays in GBP so if your currency is USD you get to take advantage of that increase in value. Polls are spotty but worth it due to the instant payout (so no minimum or anything like that). iOS and Android.

52. PollPass - $5.15

Answer polls and get paid! Pays via PayPal at $5. Very simple and fun to use. Just answer the polls whenever they are available and watch the points add up. Added this at the end of the year so hope to expand on this next year.

53. Brand Insights Polling - $5

I honestly have no clue how I got paid by them. I think I took a survey that I found from a Facebook ad or something?

54. CashForApps - $5

Get paid to download apps! They don’t pay the best and sometimes have a hard time crediting but still might be worth a shot. The very best paying apps pay around 30 cents. Some pay pennies. Available on iOS and Android. You can use my invite code “4848a6” and get a few free points.

55. EarnWallet - $5

This was a from a promotion that was posted on beermoney for just downloading EarnWallet. Check out the sub for opportunities for occasional promotional opportunities like this.

56. Shopkick - $5

Scan items, check into stores, and earn cash back for buying certain items. Not a huge earner but can be fun to mess around with when you’re out shopping. Available on iOS and Android.

57. Louder Rewards - $5

This app paid $5 Amazon to download 5 apps and use them for 3 minutes. It was a one time offer so I don’t use it anymore. It’s on iOS and Android.

58. Qmee - $4.68

Install their extension and get paid a few cents for random searches that you make. They also have surveys. I use PayPal to cash out and there aren’t any minimums that that’s cool!

59. Google Opinion Rewards - $4.68

This app sends you occasional very short surveys from Google that pay 10-20 cents. Using Google services and being mobile seems to increase the number of surveys that you get. Some people get a lot, some get less. Worth just having on your phone. The iOS app pays via PayPal and the Android app just give you Google Play credits.

60. College Pulse - $5

This app has polls for college students to take. I think you need a .edu email address? Their rewards kinda suck so I stopped using it but they had an offer to cashout for $5 bitcoin to the Ben bitcoin wallet so I did that. Maybe worth it depending on what reward options they have at the time. Android and iOS.

61. Fetch Ref Code For $2-$5 Bonus: XE2XG - $3

Scan receipts and get paid. I get 2.5 cents per receipt on average. They also have products that you can get rebates on when you buy (sorta like iBotta). They only accept grocery store receipts. A good addition to your receipt scanning routine.

62. Quick Survey - $1.61

See my section on iMoney. Very similar but with less apps available and larger fees.

63. CoinOut - $1.02

This is one of the most straight forward receipt scanning apps. It pays 1-5 cents a receipt (typically 2 cents). Cash out starts at $1 for Amazon or PayPal which is way lower than most receipt apps. Very nice. Hope to earn more with this next year. Has both Android and iOS apps.

64. Indeed Job Spotter - $1

This app pays you $0.50 per sign to submit help wanted signs that you find around your city. I have never actually submitted a sign but got paid $0.10 per sign to verify the validity of other people’s signs. I’ve seen people make pretty decent money on here.

65. 1Q - $0.25

This one seemed cool at first. Take short polls, get paid $0.25 instantly via PayPal. The problem is that I never get polls anymore. Others have had the same experience. You might be able to squeak a few cents out of it. Android and iOS.

TOTAL: $3014.92

Hope this helps you guys out, and if you have any questions let me know! Let me know what I should add to my routine :). Thanks to everyone who contributes to this subreddit because I found many of these programs thanks to you! Have a great 2019!
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