How do I transfer bitcoins to my bank account?

Kraken Exchange

A place to discuss the Kraken Digital Assets Exchange
[link]

Support page for Kraken Digital Assets Exchange

Support page for Kraken Digital Assets Exchange
[link]

btc2sms

Send and receive bitcoin purely via sms.
[link]

[QUESTION] Is there an API equivalent to Bitcoin's raw transactions in Monero? Or, alternatively, anything that would allow me to manually perform merge avoidance for my transfers?

submitted by VedadoAnonimato to Monero [link] [comments]

[Hiring] Software engineer & Dev. Ops (heavy on Rails, Crypto, financial APIs) for bridge21 Bitcoin Money Transfer

About bridge21
bridge21 is a cross-border payments service that uses Bitcoin. We are the first company to offer a real-time exchange rate (our “Bridge Rate”) based entirely on the cost of buying, sending, and selling Bitcoin in two currencies at the same time. Our customers are individuals and businesses and we are live from the US to Mexico. We need to be brilliant and creative about how we scale to meet their needs quickly!
Requirements
○ Experienced with SPAs & financial APIs, warmed up on Rails/Postgres, familiar with Bitcoin/cryptocurrency
○ Good at explaining complex concepts to designers, support, and other engineers
○ You solve problems, and are excited to fix things when they break
○ You are excited to use cryptocurrency to move money over borders more efficiently
○ You are willing to take a culture & values assessment as part of the hiring process
○ bridge21 is based in Denver but remote friendly, but you must be a US resident
○ This is a direct hire only position, no development shops, recruiters, or talent agencies please
How to Apply
If you are interested in hearing more, send your github, work you are particularly proud of, resume with references and a statement on why you would like to work for bridge21.io to [email protected].
Hint: if you can find a way for someone we already know to introduce you, this is even better.
submitted by bridge21official to denverjobs [link] [comments]

Quick, light Monero wallet

Hi,
I guess everyone notices how much time the blockchain sync takes. Even if running only a wallet, it has to scan through all past blocks in order to attempt decryption and find their outputs.
This is a real showstopper in some environments. Consider a mobile wallet on a network with low data transfer rate or expensive pricing.
How about having a site which works as follows:
  1. User who wants to run a wallet submits the view key at the site.
  2. The site runs their wallet constantly, scanning for incoming transfers.
  3. The site exposes API allowing to query for wallet balance and history, and to request new subaddresses for which the site instantly starts monitoring all future transactions.
  4. A wallet app may skip block scanning and refer to the API for info about wallet contents.
  5. The app still keeps the spend key, allowing to sign and send transfers.
Such solution might work well with existing wallets. CLI, GUI, Monerujo or Cake may just add an option to base a wallet upon the API.
The site code might be open sourced and freely available, so no one would have to trust a third party, just run their own servers.
For those not interested in setting up a server, a commercial solution might also exist, for example charging some tiny amount depending on the number of generated subaddresses.
Pros:
Cons:
Has anyone tried to build such solution?
I have enough knowledge to build such service (the website and API), although I'd have to apply for crowdfunding. Someone else would have to add support to existing wallet apps, as I'm not enough experienced in C++ nor Java.
submitted by e-mess to Monero [link] [comments]

Bitcoin vendor with useful API and bank transfer to Swedish bank

Does any of these exist? I was very interested in Coinbase but they only did transfers to US banks. There's a service called http://safello.com coming up soon, but it's not available at this moment.
Any recommendations? My goal is for my customers to pay with Bitcoins on my website and for the bitcoins to be exchanged to SEK right away.
submitted by TheYummyMan to Bitcoin [link] [comments]

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]

Idea for a BTC earning platform (fiverr, upwork, mturk).. Thoughts/suggestions?

I’m a web developer, and I’ve been prototyping a site where users can earn bitcoin through gigs (like upwork) small services (like fiverr) and microtasking (like mturk). Since acquiring paying customers could be hard at the start, I’m also planning a section for web-based games where users could earn small amounts of BTC paid for by ad revenue.
I’m still not sure about the best way to handle payouts - My thought is users could withdraw their balance at any time to another app that has more robust trading/wallet/currency exchange features like coinbase. But I’m not sure which apps (if any) have APIs to support automatic transfers.
I need to do more research but before I get too far I wanted to run it by the community for thoughts. Good concept? Bad concept? Already been done? I didn’t find any sites like this at a cursory glance.
submitted by Connect_Werewolf_754 to Bitcoin [link] [comments]

PSA: Vimba is shutting down

I've just received an email from Vimba letting me know that they are closing, effective immediately. It's posted fairly regularly here so thought it'd be worth letting people know if you haven't already seen.
As it was a service that offered recurring purchases of cryptocurrency via bank transfer, the key things to do are:
Here's the full text from the email:
Vimba is shutting down.
It's a sad day for all of the team here at Vimba. We are sorry to announce that we are shutting down all of our products. The reason for this is that we were unable to raise the capital that we need to continue our mission to build Bitcoin financial services.
Many of you may not know that we were New Zealand's oldest Bitcoin company, first launching as mybitcoinsaver.com in 2014. We were determined to build a global product and managed to establish our service in the UK and EU with users from over 15 countries regularly saving Bitcoin though Vimba.
Bitcoin is a revolutionary financial technology, and our mission was to get Bitcoin into the hands of as many people as possible. We were working towards directly integrating Bitcoin financial services into all UK/EU banks accounts using Open Banking APIs. The journey has been a rollercoaster ride, and we're proud of what we have accomplished.
The Vimba team is committed to the future of Bitcoin and would welcome opportunities where our deep industry and technical knowledge can add value. Please get in touch if we can help.
Thanks to everyone who has supported us on our journey, we do appreciate it. And remember "friends don't let friends sell Bitcoin! HODL on comrades!"
submitted by pKYmlCo70Iyn9D0q38L1 to beermoneyuk [link] [comments]

Getting started as a bitcoin cash merchant

So I've spent some time looking into various APIs and services, trying to get a basic merchant setup working usable for development, with a working testnet. The quality of the services offered and documentation is lacking, to say the least.
So I've taken a step back and decided I would try to get this working from "first principles", basically setting up a node and using the related APIs. I first tried the BCHD node which was looking promising, until the testnet version of it got into a loop where it kept complaining about some invalid transactions over and over and never seemed to recover.
The I tried "Bitcoin Cash Node", which is an awful name for search engines btw. It could really need a more unique and searchable name. After some struggle and careful reading of startup options and configuration files, I managed to get nodes up an running (testnet and mainnet) and in such a state that they answer to REST and JSONRPC calls.
I have transferred some bitcoin on testnet to a know address, using a public "faucet" that works (also a bit hard to find). I know that I managed to get that part working, as I've successfully looked up the balance of that address using a few of the public blockchain lookup tools.
What I havent' quite figured out is how to look up that address on my locally running node. Most of the API deals with transactions, not addresses. There aren't many APIs that accept addresses. scantxoutset might work, but it uses terms as "scan", which indicates it's not a "low cost" operation (which I would expect).
So I'm wondering, does this really mean that most bitcoin nodes really isn't usable for looking up addresses?? Or to turn it around, can anybody recommend bitcoin cash nodes that offers an easy to use API for looking up payment related things, like addresses?
Final note, I know how wallets etc work. The reason I'm trying to implement similar functionality from scratch is to understand all the details. And because a merchant typically can't just accept the current limited functionality with wallets, which seems focused on a single user's need, not what a merchant would need (gap issue etc).
And fwiw, I've also tested the "bitbox" API (which does not have a working testnet) and "fullstack" API (which has a working testnet, although documentation isn't complete). So I know about other ways of doing similar stuff. I'm just trying to minimize the number of external things I need to depend on while also figuring out how this can be done straight from running nodes.
submitted by kjeldahl to btc [link] [comments]

Free £10 with Mode Banking when you buy or deposit £100 worth of Bitcoin (UK based)

Mode is a banking app similar to Bitwala. It is both a bank, and also a way to buy and earn 5% APY interest on Bitcoin.
Mode banking have a referral programme. You will get £10 free in Bitcoin if you either:
Buy £100 worth of Bitcoin through the app, or
Transfer a minimum of 0.01 BTC into your Bitcoin Jar (their interest account) until the next interest payment date (every friday!).
Mode is currently only available for iPhones / iOS
Steps:
Sign up through my referral link:
  1. Referral link https://modebanking.com/referral/KEV781832
£10 bonus

Non-refferal link https://modebanking.com
No bonus

  1. Verify your ID

Buy £100 worth of Bitcoin or depositing 0.01 BTC and out in in your Bitcoin Jar (Hold for at least 2 weeks to be sure of the bonus).

You will receive the £10 bonus 24 hours after you bought the £100 in Bitcoin or on a Friday if you deposited into the Jar.

Depositing Bitcoin is free and for withdrawing you only pay the normal Blockchain fee.

All the fees: https://modebanking.freshdesk.com/support/solutions/articles/44001821361-what-fees-will-i-be-charged-

Full terms: https://modebanking.com/referral-program-terms/

Let me know if you have any questions.
submitted by TidyCompetition to beermoneyuk [link] [comments]

Decentr ($DEC) - foundational cross-chain and cross-platform DeFi protocol

  1. SUMMARY
Decentr is a protocol designed to make blockchain/DLT mainstream by allowing DeFi applications built on various blockchains to “talk to each other”. Decentr is a 100% secure and decentralised Web 3.0 protocol where users can apply PDV (personal data value) to increase APR on $DEC that users loan out as part of of our DeFi dLoan features, as well as it being applied at PoS when paying for stuff online. Decentr is also building a BAT competitor browser and Chrome/Firefox extension that acts as a gateway to 100% decentralised Web 3.0
Allows DeFi Dapps to access all Decentr’s dFintech features, including dLoan, dPay. Key innovation is that the protocols is based on a user’s ability to leverage the value of their data as exchangeable “currency”.
  1. KEY CONCEPTS

  1. REVENUE MODEL
A fee is charged for every transaction using dPay whereby an exchange takes place between money (fiat and digital) and data, and vice versa, either as part of DeFi features or via a dApp built on Decentr. They are launching pilot programmes in the following industries:
  1. Banking/PSP Industry: On Product launch, due to Decentr’s powerful PSP connections (including the worlds #2 PSP by volume), a medium-scale pilot program will be launched, which will seed the network with 150,000 PSP customers in primarily the Spanish/LAC markets, generating revenue from day one.
  2. “Bricks and Mortar” Supermarket/Grocery Industry: Decentr aims to ensure the long-term competitiveness of “bricks and mortar” supermarkets against online-only grocery retailers, such as Amazon, by a) building secure tech that allows supermarkets to digitise every aspect of their supply chains and operational functions, while b) allowing supermarkets to leverage this incredibly valuable data as a liquid asset class. Expected revenue by Year 5: $114Mn per year.
  3. Online Advertising Industry: Decentr’s 100% decentralised platform credits users secure data with payable value, in the form of PDV, for engaging with ads. The Brave browser was launched in 2012 and in 8 years has reached over 12 million monthly active users, accented by as many as 4.3 million daily active users.
  4. TOKEN $DEC AND SALE
Decentr recently complete their token sale on a purchase portal powered by Dolomite where they raised $974,000 in 10 minutes for a total sale hardcap of 1.25M. The $DEC token is actively trading on multiple exchanges including Uniswap and IDEX. Listed for free on IDEX, Hotbit, Hoo, Coinw, Tidex, BKex. Listed on CoinGecko and Coinmarketcap. Listed on Delta and Blockfolio apps.
➡️ Circulating supply: 61m $DEC.
➡️ Release schedule and token distribution LINK -> NO RELEASE UNTIL 2021.
➡️Contract Address - 0x30f271C9E86D2B7d00a6376Cd96A1cFBD5F0b9b3
➡️Decimals - 18, Ticker - DEC
➡️Uniswap link: https://uniswap.info/pai0x3AEEE5bA053eF8406420DbC5801fC95eC57b0E0A
⭐️ HOW TO BUY VIDEO: https://www.youtube.com/watch?v=iloAiv2oCRc&feature=youtu.be
$DEC Token utility:
A tradeable unit of value that is both internal and external to the Decentr platform.A unit of conversion between fiat entering and exiting the Decentr ecosystem.A way to capture the value of user data and combines the activity of every participant of the platform performing payment (dPay), or lending and borrowing (dLend), i.e a way to peg PDV to tangible/actionable value.Method of payment in the Decentr ecosystem.A method to internally underwrite the “Deconomy.
  1. NOTABLE SUPPORTERS
Simon Dedic - chief of Blockfyre: https://twitter.com/scoinaldo/status/1283787644221218817?s=20https://twitter.com/scoinaldo/status/1283719917657894912?s=21
Spectre Group Pick : https://twitter.com/SPECTREGRP/status/1284761576873041920https://twitter.com/llluckyl/status/1283765481716015111?s=21
Patrons of the Moon/Lil Uzi: https://t.me/patronsofthemoon/6764
CryptoGems: https://twitter.com/cryptogems_com/status/1283719318379925506?s=09t
tehMoonwalker pick who is a TOP 5 influencer per Binance:https://twitter.com/tehMoonwalkestatus/1284123961996050432?s=20https://twitter.com/binance/status/1279049822113198080
Holochain was one of their earliest supporters and they share a deep connection (recently an AMA was conducted in their TG group): https://medium.com/@DecentrNet/decentr-holochain-ama-29d662caed03
  1. UPCOMING NEWS
--------------------------------------------
  1. RESOURCES:
Website: https://decentr.net
Telegram: https://t.me/DecentrNet
Medium: https://medium.com/@DecentrNet
Twitter: https://twitter.com/DecentrNet
Whitepaper: https://decentr.net/files/Decentr_Whitepaper_V1.4.pdf
Technical Whitepaper: https://decentr.net/files/Decentr_Technical_Whitepaper_Data_As_Economic_Currency.pdf
Recent Articles:
⚡️- https://medium.com/@DecentrNet/decentr-token-sale-metrics-and-distribution-483bb3c58d05
⚡️- https://medium.com/@DecentrNet/how-decentrs-defi-dloan-function-benefits-dec-holders-97ff64a0c105
⚡️- https://medium.com/@DecentrNet/3-vertical-revenue-streams-decentr-is-targeting-4fa1f3dd62de
⚡️- https://medium.com/@DecentrNet/brave-browser-the-good-the-bad-and-the-fundamentally-misguided-8a8593b0ff5b
⚡️- https://medium.com/@DecentrNet/how-decentrs-dfintech-replaces-swift-sct-inst-clearing-house-and-other-payment-solutions-78acacbb4c3f
Chad Gang STRONG Community: https://t.me/decentrtrading
Community News Channel: https://t.me/chadnews
Recent Uniswap trades: https://t.me/dectrades
Wallet holder tracker: https://t.me/DEC_WALLETS_COUNT
submitted by ldd999 to CryptoMoonShots [link] [comments]

Crypto.com Lists DIA

Crypto.com Lists DIA

Best place to purchase DIA at true cost with zero fees and markups
DIA is listed on the Crypto.com App today, 16 September 2020. DIA joins a growing list of 70+ cryptocurrencies and stablecoins on our App, such as Bitcoin (BTC), Ether (ETH), XRP, Cardano (ADA), Chainlink (LINK), VeChain (VET), USD Coin (USDC), as well as CRO Tokens.
DIA (Decentralised Information Asset) is an open-source, data and oracle platform for the DeFi ecosystem. DIA leverages crypto-economic incentives to drive supply, share and use transparent, crowd-verified price data and oracles on financial and digital assets. Data is pulled directly from exchange APIs and other public sources to DIA servers. The database is hashed on-chain and the methodology is documented on Github. Feeds are accessible via oracles or API. DeFi protocols and other data users can plug and play into DIA data streams.
With DIA added to the Crypto.com App, users can now purchase it at true cost with no fees - credit card and bank transfer both supported. As Crypto.com also offers a Visa Card, this adds additional utility to DIA as users can easily convert cryptocurrencies into fiat currencies and spend at over 60m merchants globally.
Note: - DIA is not available for residents of the United States.
submitted by BryanM_Crypto to Crypto_com [link] [comments]

Reverse Chance Me: Indian-American Male

Demographics: male, upper middle class, Asian Indian, heterosexual and cisgender, Long Island, New York, high school class of 2021
Intended Major(s): Mathematics
ACT/SAT/SAT II/PSAT: 35 (35E, 36M, 34R, 36S), 1570 (800 math, 770 english, 23/24 essay), 800 math2, 800 chem, 800 physics, 1500 (760 math, 740 english; hopefully i get national merit since I made the cut off)
UW/W GPA and Rank: 4.0UW, 103.96% weighted so far (out of 100%, APs weighted 1.08 and Honors 1.06; I'm not sure what it is out of 5 but everything's been an A or higher so far)
Coursework:
10th: AP World History (4, 99%), AP Computer Science Principles (4, 99%), AP Calculus BC (5, 97%); all other grades except Chemistry (96%) at least 97%
11th: AP Lang (5, 97%), Multivariable Calculus and Linear Algebra (through school, weighted as an AP, 98%; I get college credit from a state university for taking this), AP Physics 1 (5, 98%), AP United States History (5, 99%), AP Computer Science A (5, 100%), AP Statistics (self-studied, 5); all other grades 97% or higher
the above courses were taken through school, but I enrolled as a non-matriculated undergraduate student through the same state university that's giving me college credit for high school multi to take the following courses in Fall 2019 and Spring 2020 respectively:
"Logic, Language, and Proofs" (basically introduced me to the language of mathematics and abstract proof construction, etc.) (A+), Introduction to Real Analysis (third-year undergraduate course, probably) (A+)
12th: (incoming senior) AP Lit, Differential Equations (through school, weighted as an AP; I get college credit from a state university for taking this), AP Physics C (I don't know which yet but probably E/M), AP US Gov, AP Micro, AP Spanish Lang
the above courses are going to be taken through school, but I enrolled as a non-matriculated undergraduate student through the same state university that's giving me college credit for high school diffeq to take the following courses in Summer 2020, Fall 2020, and Spring 2021 respectively:
Applied Complex Analysis (well, I actually just finished this course, so I got an A), Advanced Linear Algebra, Analysis in Several Dimensions
like 12 APs in total by the end of senior year; I have taken the most rigorous courses available + courses at college
Awards:
AIME Qualifier (missed the USAMO cutoff by one AIME question's worth of index points, oops), HMMT/PUMaC awards
President's Volunteer Service Award, Gold (by the end of senior year, I should have lifetime ~650-675 volunteer hours): 3-time winner, 10th, 11th, and (expected) 12th
AP Scholar (I don't remember which though I have it on my application, but based on the scores I have, you can figure it out if you need to), Commended PSAT Scholar
UNSCO Qualifier, USAPhO Qualifier, USACO Silver
Regeneron Semifinalist, Scholastic Silver Writing Award (this was like 2-3 years ago, I don't remember much about it)
Essays:
they're actually coming on really good so far, not done writing though
Letters of Recommendations: my multi/diffeq teacher (really epic), my physics 1/c teacher (pretty good), my counselor (really good); additionally, I'm considering getting one from my principal (he first set me up to take the college math courses because he's an adjunct professor at the university I took courses at, so it should be cool), and a Princeton dude (see below for more explanation; he also used to mentor me before I started doing research)
Extracurriculars/Leadership Roles:
Science Olympiad (have won state medals before), Math Team (treasuresecretary 12th, top scorer in county-wide mathematics tournaments), Coding/CS Club (treasurer 11th, vice president 12th), National Honor Society, DECA (have qualified for the national-level competition, ICDC), did Model UN (but stopped after 10th, so probably won't put this on)
treasurer of our school's science research program from 2018 (personally offered this position by the director of the program) to when I graduate from high school in 2021
information technologist for a science education nonprofit
formerly unpaid teacher assistant (now paid 'intern'; my position got renamed because I've started doing more than just TAing) at a weekend mathematics enrichment program I used to attend when I was younger; I just set up and now own/manage the program's Discord as well as helped implement a grading system for the students on Google Classroom during the transition from real-life classes to online, Zoom classes due to COVID-19
CTO of a startup digital advertising business I co-founded with my friend (I personally made just under $15,000 so far, but the business's net worth is about $40,000)
in July 2018, I attended a summer program that related to computer science, electrical engineering, and informatics; we learned several skills such as programming Python (including NumPy, Matplotlib, and Pandas) in the context of physical engineering concepts and the Raspberry Pi; I engineering a program comparable to the widespread arcade game “Wheel of Fortune”
hospital volunteer (transporter, a large source of my volunteer hours)
Bitcoin/general cryptocurrency trademiner, I've set up several ASIC miners and studied their stock trends to optimize the amount of money I make from them, although I put a hold on this activity when crypto started dying again
10-year piano player (stopped in 9th grade though, but I went to state-level festivals and got perfect scores on my performances), 5-year viola player (planning to qualify for the state festival this year), JV Tennis (memes), 7-year soccer player (stopped after 9th grade, though)
also I'm probably not gonna put this on my application, but out of enjoyment, my friend and I conducted a satire analysis on our in-class chemistry performance through research, usage of spreadsheet/database applications, and Python’s machine learning modules; essentially, we collaborated on our mutual objective for his project in that we sought to “predict” when our grades would drastically fall, and a psychological explanation as to why we, somewhat academically-oriented students, tend to make the most drastic shortcomings when it comes to in-class performance ( used long short-term memory in the structures of recurrent neural networks which served as a model for Keras, a Python deep learning API, to make a grade prediction based on learning the ups and downs of our previous grades)
not sure if this counts for anything, but in May of 2012, in a Nassau County-based competition that I took against high schoolers double my age at the time, I won first place for the highest amount of problems correct so that's pretty cool I guess
finally, I've done over-the-summer online research under the guidance of a postdoctoral researcher in mathematics I got the contact of during a visit to Princeton University (did his doctoral thesis under the mentoring of Terence Tao, a world-renowned Fields Medal recipient)
Other life circumstances:
recovering narcotics addict (I had an injury while playing soccer in the spring of 9th grade and got hooked for a year after I didn't need them anymore), violent/alcohol-ridden home situation; I've had some issues with mental health in 9th and early 10th grade but I think I'm doing better now yay

I really wanna make it into some kind of Ivy/T20 kinda school, but I'm open to any suggestions as to where I stand in college admissions. Also, because I took all those college math courses, I got permission from the undergraduate director of mathematics to transfer those into credits for a bachelor's degree at that state school, so I can graduate two years early (2023 instead of 2025) if I get accepted and enroll there as a full-time student.
I'd really appreciate any help! Thanks!
submitted by mesmore to chanceme [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.
submitted by hkalodner to ethereum [link] [comments]

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Coinbase ($10 in Free Bitcoin + $115 in Bonus Crypto)

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In addition, get up to $115 in free cryptocurrency by learning, watching videos, and answering simple questions about other cryptocurrencies like EOS (up to $50 bonus), Stellar Lumens (up to $50 bonus), and Compound (up to $9 bonus) without any deposit or trading required. You can easily make up to $160 in free cryptocurrency and cash out the money back to your bank!
You can also earn 0.15% annual interest holding USDC tokens (for US customers) and 4% annual interest staking Tezos tokens (for US, UK, and EU customers)!
Coinbase is one of the most trusted and easiest place to buy, sell, and manage your digital currency portfolio and its available in 100+ countries around the world! Coinbase allows you to deposit/withdrawal funds via free bank transfer, credit/debit card or bank wire.
Remember to use my referral link to get your $10 of free Bitcoin after trading $100 or more in crypto plus another $115 in free crypto bonuses - https://www.coinbase.com/join/5a29d6adad50d7010b47bac0
Thank you!

Crypterium ($5 Cash Bonus)

Have you tried the Crypterium Crypto Wallet App for iOS and Android? Sign up for Crypterium at https://crypterium.app.link/DU5iX9vsDY (or use referral code cdgy4 during signup) and get a $5 cash bonus by verifying your identity and make a transaction worth €50/$60 or more (like buy or sell crypto) via the Crypterium Wallet app. The bonus is deposited within 72 hours.
Crypterium lets you buy, send, exchange or cash out crypto, and even get the first global crypto card! The Crypterium Wallet is regarded as one of the most promising fintech solutions by KPMG and H2 Ventures. Making crypto as easy to spend as cash!
Plus for a limited time, get a Crypto Loan in USDT from Crypterium for 0% interest for up to 12 months by using Bitcoin or Ethereum as collateral. Get approved in as little as 30 seconds without credit checks!
The Crypterium App supports cryptocurrencies such as Bitcoin, Ethereum, Litecoin, Bitcoin Cash, CRPT, XRP, LINK, MKR, QASH, BAT, ZRX, REP, OMG, USDC, USDT, DAI, and EURS.
Register at https://crypterium.app.link/DU5iX9vsDY to receive a link to download the app or use my referral code cdgy4 during signup at https://crypterium.com and get your $5 cash bonus!
Thank you!

https://preview.redd.it/fazmzja3rhr51.png?width=2486&format=png&auto=webp&s=6294d5449f241051721ba97d062db245547b5e9a
submitted by cryptomiles to referralcodes [link] [comments]

5 Free Stocks and $350 Free Cash/Bitcoin - Sign Up for Webull, Public, Moomoo, M1 Finance, SoFi Invest, Robinhood, BlockFi, Voyager, BlockFi, Gemini, Celsius Network, Crypto.com, Coinbase, Crypterium - Commission Free Stock Trading + Cryptocurrency Apps

5 Free Stocks and $350 Free Cash/Bitcoin - Sign Up for Webull, Public, Moomoo, M1 Finance, SoFi Invest, Robinhood, BlockFi, Voyager, BlockFi, Gemini, Celsius Network, Crypto.com, Coinbase, Crypterium - Commission Free Stock Trading + Cryptocurrency Apps
Get up to five (5) free stocks (valued up to $2450 total) plus a $85 cash bonus when you sign up for any commission free stock trading app with no deposit required like Public, Robinhood and Webull or a small deposit like SoFi Invest, Moomoo, and M1 Finance. You can buy stocks like Tesla and Google for as low as $1 with fractional shares at M1 Finance, Robinhood, Public, and SoFi Invest! Free stocks are available to US residents only.
Plus enjoy a minimum of $150 (up to $265) in free cash/Bitcoin bonuses from Crypto.com ($50 Cash), Voyager ($25 Bitcoin), BlockFi ($10 Bitcoin), Celsius Network ($40 Bitcoin Bonus), Gemini ($10 Bitcoin), Coinbase ($10 Bitcoin + $115 Bonus), and Crypterium ($5 Cash) by signing up and making a small deposits/transactions! All companies are regulated and licensed. Crypto.com, Celsius Network, BlockFi, Gemini, Coinbase, and Crypterium are open to users globally, but Voyager and Binance.US are available to US customers only.
More details below! Be sure to use each referral link or promo code to get your free stock, cash, and Bitcoin bonuses and thank you!

Webull (2 Free Stocks up to $1600)

Sign up for Webull (https://act.webull.com/i/Vofifd5bibi6/3jx/us_na_invite_year02) and receive two free stocks (valued between $8 to $1600) when you open a stock brokerage account (within 24 hours) and make an initial deposit of $100 or more!
You do not need to invest the money deposited and simply transfer the money back to your bank after receiving the two free stock bonuses.
That's two free stocks! Webull is available on Android and iOS!
Webull is registered and regulated by the Securities and Exchange Commission (SEC) and the Financial Industry Regulatory Authority (FINRA). It is also a member of the SIPC which protects securities customers of its members up to $500,000 (including $250,000 for claims for cash).
Remember to sign up and get your two free stocks after $100+ deposit at https://act.webull.com/i/Vofifd5bibi6/3jx/us_na_invite_year02
Thank you!

Public (1 Free Stock up to $50, No Deposit Required)

Sign up for Public (https://share.public.com/domaindave), a commission-free stock trading app for iOS and Android, and receive a free stock slice worth up to $50 when you open a new trading account. No deposit required to receive your free stock!
It takes about 5 minutes to sign up! Please visit the link using your iOS or Android phone to download the app. Within 24 hours, I received a $25 slice of Apple stock when I opened a Public account!
Public allows you to buy a slice of any stock like Apple, Tesla, and Google for as low as $5 with no trading fees and your Public stock trading account is SIPC insured up to $500,000.
Be sure to use my Public signup link on your mobile phone to get your free stock with no deposit required - https://share.public.com/domaindave
Thank you!

SoFi Invest ($75 Cash Bonus)

Open a SoFi Invest Account (https://www.sofi.com/share/invest/1919989) today and get a $50 cash bonus to invest in ANY stock or ETF with no trading fees!
Just open a SoFi Invest Account with an initial deposit of $1000 or more and SoFi will instantly give you a $50 cash bonus to invest in any stock which you can sell and cash out the money back to your bank account.
Plus get another $25 cash bonus when you buy $10 or more of crypto like Bitcoin, Litecoin or Ethereum. That's a total of $75 cash bonuses with SoFi Invest!
I love SoFi Invest because you can invest in any stock or ETF like Apple, Amazon or Google for as low as $1 with fractional share investing and no fees to buy or sell! Be sure to signup at https://www.sofi.com/share/invest/1919989
Thank you!

M1 Finance ($10 Cash Bonus)

Sign up for a free M1 Finance stock trading account (https://m1.finance/wG5ouGBolHyU) and you'll get a $10 cash bonus after you make an initial deposit of $100 or more when you open a taxable (non-retirement) account. You can choose to invest the cash bonus or withdrawal the money to your bank!
If you open a taxable (non-retirement) account, then you must make initial deposit of $100 or more to get $10 cash bonus. If you open an IRA account, then you must make initial deposit of $500 or more to get bonus and open a taxable (non-retirement) account.
M1 Finance allows you to buy fractional shares as low as $0.01 on stocks and ETFs like Tesla, Amazon, and Google with no trading/commission fees plus there are no monthly fees or account minimums. You can open a regular investment, IRA, and/or Roth IRA account plus your accounts are SIPC and FDIC insured!
Be sure to use my M1 Finance signup link - https://m1.finance/wG5ouGBolHyU
Thank you!

Moomoo (1 Free Stock up to $1000)

Sign up for Moomoo Commission Free Stock Trading App (https://j.moomoo.com/001zFH) and open a trading account and you're guaranteed to receive a free stock (valued between $10-$1000) when you make an initial deposit of $500 or more.
You'll have a 1 in 250 chance to win a free stock in Tesla, Netflix, Apple or Facebook and 1 in 100 chance to win a free stock in Microsoft, Disney, Starbucks or IBM.
You don't need to buy stocks with your deposit. You can simply get your free stocks, sell it and cash out back to your bank. It took me about 20 minutes for my account to get verified and receive my free stock within 3 days after my initial deposit cleared.
Moomoo (Futu Inc.) is a member of FINRA and SIPC so your account is protected up to $500,000. Moomoo app is available for iOS and Android!
Be sure to signup with my referral link to get your free stocks! - https://j.moomoo.com/001zFH
Thank you!

Robinhood (1 Free Stock up to $200)

Sign up for a free Robinhood stock trading account (http://invite.robinhood.com/davids2005) and you'll get a free stock valued up to $200 instantly (like Ford, Apple or Facebook) with no deposit required! Its free money just for signing up!
Plus you can buy any stock or ETF like SPY and Tesla for as low as $1 with fractional share investing.
Robinhood offers commission-free trading on stocks and ETFs via web and mobile plus your account is SIPC insured! Plus you can signup for a free Cash Management Account with 0.30% APY interest on cash (FDIC insured up to $1.25 million), free Mastercard debit card, no foreign transaction fees, no account minimums and no fee 75,000+ ATMs.
Be sure to use my Robinhood signup link and thanks! - http://invite.robinhood.com/davids2005
Thank you!

Voyager ($25 in Free Bitcoin + Up to 6% APY Interest)

Get $25 in free Bitcoin (BTC) when you download and signup for the Voyager Crypto Trading App with code O6E5JJ and trade at least $100 or more in crypto (buy and/or sell). Only available to US residents.
To get your $25 in free Bitcoin after trading (buy/sell) $100 or more in crypto, use reward/referral code O6E5JJ during registration:
Voyager App allows you to connect a bank account and deposit cash directly. The easiest way to get the bonus is depositing at least $100 into your account to buy at least $100 of Bitcoin or Ethereum. Then sell the Bitcoin/Ethereum immediately. You'll receive your $25 in free Bitcoin bonus and can transfer the money back to your bank.
Voyager App offers commission-free cryptocurrency trading for over 20 cryptos and its currently available to residents in all U.S. states (excluding New York state).
Plus, you can earn monthly interest on your crypto holdings up to 6% APY interest annually on Bitcoin, Ethereum, Litecoin, USDC, and USDT!
Please use my referral code by downloading the iOS app or Android app and use reward/referral code O6E5JJ during registration. Its an easy way to earn a $25 worth of free Bitcoin after you buy $100 or more in crypto and cash out the profit back to your bank!
Thank you!

BlockFi ($10 in Free Bitcoin + Earn up to 8.6% Per Year on Crypto Deposits)

Sign up for BlockFi (https://blockfi.com/?ref=c316afd8) and receive $10 in free Bitcoin bonus when you deposit $100 or more in crypto and maintain the qualifying balance until the following interest payment day. The bonus is deposited on your first monthly interest payment. Do not withdraw from your balance or you WILL LOSE the Bitcoin bonus payment. Just wait until you receive your Bitcoin bonus then you can withdraw from your account.
This promotional $10 Bitcoin bonus is available to all customers globally!
Plus you'll earn up to 8.6% per year on the cryptos you deposit into your BlockFi account like Bitcoin, Ethereum, Litecoin, PAX, GUSD and USDC. Interest is compounded monthly and paid out on the 1st of every month.
You can download the iOS app (https://apps.apple.com/us/app/blockfi/id1506274532) or Android app (https://play.google.com/store/apps/details?id=com.blockfi.mobile). Be sure to use referral code c316afd8 during signup to get your $10 Bitcoin bonus after initial $100 or more deposit.
BlockFi supports bank wire transfers and deposits via crypto. If you want to buy crypto and deposit on BlockFi, you will need to use Coinbase, Gemini, or Binance US to link your bank account to buy crypto and transfer to BlockFi.
In addition to earning interest on your crypto deposits, BlockFi allows you to exchange cryptos like BTC for Ethereum and take out a loan without selling your crypto.
BlockFi is available to all customers globally including in all 50 US states! BlockFi is a licensed and regulated company in the United States.
Remember to sign up at https://blockfi.com/?ref=c316afd8 to get your $10 in free Bitcoin bonus.
Thank you!

Crypto.com ($50 Cash Bonus + Up to 12% APY Interest)

Get $50 free cash bonus when you signup and open a Crypto.com account (https://platinum.crypto.com/bcsbb2r465) or use referral code bcsbb2r465 during registration. After you buy and hold 1000 CRO (Crypto.com) tokens, the $50 cash bonus is unlocked to your wallet to spend with your free MCO Visa prepaid card which earns up to 5% cashback on all purchases with free Netflix, Spotify or Amazon Prime membership!
Crypto.com is the best place to buy and sell cryptocurrency with fees as low as 0.10%. Plus you'll earn up to 8% interest per year on the cryptos you deposit into your Crypto.com account like Bitcoin, Ethereum, Litecoin, Binance Coin, and PAX Gold. You'll earn up to 12% interest per year on stablecoin deposits like USDT, USDC, DAI, PAX, GUSD and TGBP. Interest is paid weekly!
You can buy 1000 CRO (Crypto.com) tokens via the Crypto.com app with bank transfer, credit card or crypto like Bitcoin. 1000 CRO will cost between $140 to $180 depending on the price of CRO tokens. The 1000 CRO tokens will be locked up for 6 months.
Visit https://platinum.crypto.com/bcsbb2r465 or download the Crypto.com app for iOS or Android and use my referral code bcsbb2r465 during registration to get your instant $50 cash bonus.

Celsius Network ($40 in Free Bitcoin + Up to 22% APY Interest)

Sign up on Celsius Network (https://celsiusnetwork.app.link/1891962be1) and you'll get $20 in free Bitcoin (BTC) after first deposit of $200 or more in crypto (like Bitcoin, Ripple, Ethereum, USDT, USDC) within 30 days! In addition, there are additional promotional codes that you can input into the app after you complete the registration and KYC process which will earn you an additional $20 in free Bitcoin after additional deposits totaling $200 or more. You'll earn a total of $40 in free Bitcoin bonuses!
You'll also earn up to 22% APY interest on all the cryptos you deposit including BTC, ETH, BCH, LTC, XRP, XLM, Tether Gold, and USD stablecoin (like USDC, USDT, DAI, PAX) with no fees to deposit or withdrawal!
After you make your initial $200 or more in crypto deposit to get $20 in free Bitcoin, enter the following promo codes in the app to earn additional $20 more free Bitcoin:
  • SUMMER - Get $20 free in BTC after depositing $200+ and holding it for 30 days with each promo code
DO NOT WITHDRAW any crypto from your account for 30 days OR YOU WILL LOSE the bonuses. Wait until all bonuses are unlocked (after 30 days) if you wish to withdraw your crypto.
I love Celsius because interest is paid out every Monday! Your free Bitcoin is locked for 30 days after your initial deposit and available to withdrawal after 30 days. You cannot withdraw any funds deposited for 30 days or else you will lose the Bitcoin bonus!
At the moment you can't link a bank account to deposit cash to your Celsius Network account so you'll need to use Coinbase, Binance US, Crypto.com or Gemini to buy crypto like Bitcoin or USDC and transfer to your Celsius account. Then transfer back to cash out and back to your bank.
Remember to use my Celsius Network referral link - https://celsiusnetwork.app.link/1891962be1 or use promo code 1891962be1 during registration.
In summary, you will earn a total of $40 in free Bitcoin after depositing at least $400+ in crypto into your Celsius Network account within 30 days.
Thank you!

Gemini ($10 in Free Bitcoin)

Get $10 in free Bitcoin when you signup for Gemini, a US-based regulated and licensed cryptocurrency exchange. This offer is available to NEW USERS ONLY residing in the United States, United Kingdom, Canada, Hong Kong, Singapore, and South Korea.
Follow these steps:
  1. Sign up for a Gemini account with my referral link at https://gemini.com/share/mllyldt7 (new users only)
  2. Verify your identity
  3. Link your bank account and deposit $100 or more
  4. Buy or Sell 100 USD of any crypto within 30 days of opening an account and Gemini will deposit your bonus of $10 worth of Bitcoin within a day.
After you receive your free $10 of Bitcoin, you can sell your cryptos and transfer the cash back to your bank! Gemini also allows you to transfer any crypto to an external wallet for free with no withdrawal fees.
Gemini is regulated by the New York State Department of Financial Services (NYSDFS) and was founded in 2014 by Cameron and Tyler Winklevoss.
Thank you!

Coinbase ($10 in Free Bitcoin + $115 in Bonus Crypto)

Sign up for a Coinbase cryptocurrency account (https://www.coinbase.com/join/5a29d6adad50d7010b47bac0) and get $10 of free Bitcoin (BTC) after you buy or sell $100 or more in cryptocurrency like Bitcoin, Ethereum, and Bitcoin Cash. You will also need to verify your identity. This offer is available to all customers globally!
In addition, get up to $115 in free cryptocurrency by learning, watching videos, and answering simple questions about other cryptocurrencies like EOS (up to $50 bonus), Stellar Lumens (up to $50 bonus), and Compound (up to $9 bonus) without any deposit or trading required. You can easily make up to $160 in free cryptocurrency and cash out the money back to your bank!
You can also earn 0.15% annual interest holding USDC tokens (for US customers) and 4% annual interest staking Tezos tokens (for US, UK, and EU customers)!
Coinbase is one of the most trusted and easiest place to buy, sell, and manage your digital currency portfolio and its available in 100+ countries around the world! Coinbase allows you to deposit/withdrawal funds via free bank transfer, credit/debit card or bank wire.
Remember to use my referral link to get your $10 of free Bitcoin after trading $100 or more in crypto plus another $115 in free crypto bonuses - https://www.coinbase.com/join/5a29d6adad50d7010b47bac0
Thank you!

Crypterium ($5 Cash Bonus)

Have you tried the Crypterium Crypto Wallet App for iOS and Android? Sign up for Crypterium at https://crypterium.app.link/DU5iX9vsDY (or use referral code cdgy4 during signup) and get a $5 cash bonus by verifying your identity and make a transaction worth €50/$60 or more (like buy or sell crypto) via the Crypterium Wallet app. The bonus is deposited within 72 hours.
Crypterium lets you buy, send, exchange or cash out crypto, and even get the first global crypto card! The Crypterium Wallet is regarded as one of the most promising fintech solutions by KPMG and H2 Ventures. Making crypto as easy to spend as cash!
Plus for a limited time, get a Crypto Loan in USDT from Crypterium for 0% interest for up to 12 months by using Bitcoin or Ethereum as collateral. Get approved in as little as 30 seconds without credit checks!
The Crypterium App supports cryptocurrencies such as Bitcoin, Ethereum, Litecoin, Bitcoin Cash, CRPT, XRP, LINK, MKR, QASH, BAT, ZRX, REP, OMG, USDC, USDT, DAI, and EURS.
Register at https://crypterium.app.link/DU5iX9vsDY to receive a link to download the app or use my referral code cdgy4 during signup at https://crypterium.com and get your $5 cash bonus!
Thank you!

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submitted by cryptomiles to referralcodes [link] [comments]

Bittrex API Tutorial How To Fund Your Blockchain Wallet With Bitcoin - YouTube Bitcoin 101 - Calling All APIs - Coding Live Price Data ... Transferring Money Blockchain(bitcoin) to coins.ph(peso ... Trade automatizado: veja a API do Mercado Bitcoin - YouTube

how to transfer coin using bitcoin rest API. Ask Question Asked 6 years, 7 months ago. Active 6 years, 7 months ago. Viewed 4k times 1. I've been googling for quite some time now, but I was unable to locate any complete example, with the request & the POST/GET parameters to the Bitcoin JSON-RPC. How to use the JSON-RPC ? ... The Zcash Payment API extends the functionalities of the Bitcoin Core API by supporting private Zcash payments. The API enables access to accounting, addresses, key management, operations, and... Bitcoin: 2: ... Bit-Z Transfer: The Bit-Z Transfer API allows developers to get assets, deposit addresses, and withdrawal addresses. ... Send bitcoins from account to bitcoin address. Create bitcoin transfer with confirmed status by default. Set unconfirmed... You can transfer bitcoin to bank account with the help of wallet. A wallet stores the data important to execute bitcoins. While wallets are regularly portrayed as a place to hold or store bitcoins, because of the idea of the framework, bitcoins are indivisible from the blockchain exchange record. Bitcoin transfer. In Bitcoin, everything is designed to make sure that the transactions go through. In this chapter we are going to introduce the basic concepts of Bitcoin by guiding you through a creation of simple bitcoin transaction "by hand". Later we are going to show you a higher level framework for building transactions.

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Bittrex API Tutorial

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Support the channel with a Bitcoin donation - 1BcYJCVfU9imPKTrqhdVpmUfweAo9fT3U9 Keep your crypto safe with an offline wallet (cold wallet) - Ledger Nano S (Offline ... Confused about APIs and JSON? Looking to run an arbitrage business or build a data intensive site? Well this video is for you. This is the first of our video... Cryptocurrency can be a high-risk, high-reward game for those willing to deal with the volatility. Can we use AI to help us make predictions about Bitcoin's ... In order to fund your Blockchain wallet, you will need 2 things: 1) an account and wallet at Blockchain.info 2) an account at Coinbase: http://www.kurttasche...

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