Blockchain Wallet API: Bitcoin Wallet API - Blockchain

NiceHash - buy & sell hashing power

NiceHash offers you to buy or sell hashing power directly, no contracts, no limitations, pay-as-you-go if you're a buyer and be-paid-as-you-go if you're a seller. Why bother renting rigs, when you can rent hashing power? NiceHash brings more to renters and rig owners. Visit https://www.nicehash.com today! Simply create order and you are already mining your favorite coin or point your rig to our stratum server and you are already earning bitcoins.
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Cryptocurrency news and discussions.

Cryptocurrency news and discussion. Bitcoin, Litecoin, Ethereum, Ripple, Monero, Dash, NEO, IOTA Lightning Network, SegWit, Augur, Steemit, privacy, ICO, block time, Proof of Work, Proof of Stake, NEM, Peercoin, Vertcoin, Iconomi, Dogecoin, Zcash, BitShares, Walton, mining, hashrate, mining difficulty, blockchain, coinbase, merkle, transaction rate, decentralized exchange, annual inflation rate, total market cap, bitcoin cash, BTC
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Gridcoin 5.0.0.0-Mandatory "Fern" Release

https://github.com/gridcoin-community/Gridcoin-Research/releases/tag/5.0.0.0
Finally! After over ten months of development and testing, "Fern" has arrived! This is a whopper. 240 pull requests merged. Essentially a complete rewrite that was started with the scraper (the "neural net" rewrite) in "Denise" has now been completed. Practically the ENTIRE Gridcoin specific codebase resting on top of the vanilla Bitcoin/Peercoin/Blackcoin vanilla PoS code has been rewritten. This removes the team requirement at last (see below), although there are many other important improvements besides that.
Fern was a monumental undertaking. We had to encode all of the old rules active for the v10 block protocol in new code and ensure that the new code was 100% compatible. This had to be done in such a way as to clear out all of the old spaghetti and ring-fence it with tightly controlled class implementations. We then wrote an entirely new, simplified ruleset for research rewards and reengineered contracts (which includes beacon management, polls, and voting) using properly classed code. The fundamentals of Gridcoin with this release are now on a very sound and maintainable footing, and the developers believe the codebase as updated here will serve as the fundamental basis for Gridcoin's future roadmap.
We have been testing this for MONTHS on testnet in various stages. The v10 (legacy) compatibility code has been running on testnet continuously as it was developed to ensure compatibility with existing nodes. During the last few months, we have done two private testnet forks and then the full public testnet testing for v11 code (the new protocol which is what Fern implements). The developers have also been running non-staking "sentinel" nodes on mainnet with this code to verify that the consensus rules are problem-free for the legacy compatibility code on the broader mainnet. We believe this amount of testing is going to result in a smooth rollout.
Given the amount of changes in Fern, I am presenting TWO changelogs below. One is high level, which summarizes the most significant changes in the protocol. The second changelog is the detailed one in the usual format, and gives you an inkling of the size of this release.

Highlights

Protocol

Note that the protocol changes will not become active until we cross the hard-fork transition height to v11, which has been set at 2053000. Given current average block spacing, this should happen around October 4, about one month from now.
Note that to get all of the beacons in the network on the new protocol, we are requiring ALL beacons to be validated. A two week (14 day) grace period is provided by the code, starting at the time of the transition height, for people currently holding a beacon to validate the beacon and prevent it from expiring. That means that EVERY CRUNCHER must advertise and validate their beacon AFTER the v11 transition (around Oct 4th) and BEFORE October 18th (or more precisely, 14 days from the actual date of the v11 transition). If you do not advertise and validate your beacon by this time, your beacon will expire and you will stop earning research rewards until you advertise and validate a new beacon. This process has been made much easier by a brand new beacon "wizard" that helps manage beacon advertisements and renewals. Once a beacon has been validated and is a v11 protocol beacon, the normal 180 day expiration rules apply. Note, however, that the 180 day expiration on research rewards has been removed with the Fern update. This means that while your beacon might expire after 180 days, your earned research rewards will be retained and can be claimed by advertising a beacon with the same CPID and going through the validation process again. In other words, you do not lose any earned research rewards if you do not stake a block within 180 days and keep your beacon up-to-date.
The transition height is also when the team requirement will be relaxed for the network.

GUI

Besides the beacon wizard, there are a number of improvements to the GUI, including new UI transaction types (and icons) for staking the superblock, sidestake sends, beacon advertisement, voting, poll creation, and transactions with a message. The main screen has been revamped with a better summary section, and better status icons. Several changes under the hood have improved GUI performance. And finally, the diagnostics have been revamped.

Blockchain

The wallet sync speed has been DRASTICALLY improved. A decent machine with a good network connection should be able to sync the entire mainnet blockchain in less than 4 hours. A fast machine with a really fast network connection and a good SSD can do it in about 2.5 hours. One of our goals was to reduce or eliminate the reliance on snapshots for mainnet, and I think we have accomplished that goal with the new sync speed. We have also streamlined the in-memory structures for the blockchain which shaves some memory use.
There are so many goodies here it is hard to summarize them all.
I would like to thank all of the contributors to this release, but especially thank @cyrossignol, whose incredible contributions formed the backbone of this release. I would also like to pay special thanks to @barton2526, @caraka, and @Quezacoatl1, who tirelessly helped during the testing and polishing phase on testnet with testing and repeated builds for all architectures.
The developers are proud to present this release to the community and we believe this represents the starting point for a true renaissance for Gridcoin!

Summary Changelog

Accrual

Changed

Most significantly, nodes calculate research rewards directly from the magnitudes in EACH superblock between stakes instead of using a two- or three- point average based on a CPID's current magnitude and the magnitude for the CPID when it last staked. For those long-timers in the community, this has been referred to as "Superblock Windows," and was first done in proof-of-concept form by @denravonska.

Removed

Beacons

Added

Changed

Removed

Unaltered

As a reminder:

Superblocks

Added

Changed

Removed

Voting

Added

Changed

Removed

Detailed Changelog

[5.0.0.0] 2020-09-03, mandatory, "Fern"

Added

Changed

Removed

Fixed

submitted by jamescowens to gridcoin [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]

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]

Bob The Magic Custodian



Summary: Everyone knows that when you give your assets to someone else, they always keep them safe. If this is true for individuals, it is certainly true for businesses.
Custodians always tell the truth and manage funds properly. They won't have any interest in taking the assets as an exchange operator would. Auditors tell the truth and can't be misled. That's because organizations that are regulated are incapable of lying and don't make mistakes.

First, some background. Here is a summary of how custodians make us more secure:

Previously, we might give Alice our crypto assets to hold. There were risks:

But "no worries", Alice has a custodian named Bob. Bob is dressed in a nice suit. He knows some politicians. And he drives a Porsche. "So you have nothing to worry about!". And look at all the benefits we get:
See - all problems are solved! All we have to worry about now is:
It's pretty simple. Before we had to trust Alice. Now we only have to trust Alice, Bob, and all the ways in which they communicate. Just think of how much more secure we are!

"On top of that", Bob assures us, "we're using a special wallet structure". Bob shows Alice a diagram. "We've broken the balance up and store it in lots of smaller wallets. That way", he assures her, "a thief can't take it all at once". And he points to a historic case where a large sum was taken "because it was stored in a single wallet... how stupid".
"Very early on, we used to have all the crypto in one wallet", he said, "and then one Christmas a hacker came and took it all. We call him the Grinch. Now we individually wrap each crypto and stick it under a binary search tree. The Grinch has never been back since."

"As well", Bob continues, "even if someone were to get in, we've got insurance. It covers all thefts and even coercion, collusion, and misplaced keys - only subject to the policy terms and conditions." And with that, he pulls out a phone-book sized contract and slams it on the desk with a thud. "Yep", he continues, "we're paying top dollar for one of the best policies in the country!"
"Can I read it?' Alice asks. "Sure," Bob says, "just as soon as our legal team is done with it. They're almost through the first chapter." He pauses, then continues. "And can you believe that sales guy Mike? He has the same year Porsche as me. I mean, what are the odds?"

"Do you use multi-sig?", Alice asks. "Absolutely!" Bob replies. "All our engineers are fully trained in multi-sig. Whenever we want to set up a new wallet, we generate 2 separate keys in an air-gapped process and store them in this proprietary system here. Look, it even requires the biometric signature from one of our team members to initiate any withdrawal." He demonstrates by pressing his thumb into the display. "We use a third-party cloud validation API to match the thumbprint and authorize each withdrawal. The keys are also backed up daily to an off-site third-party."
"Wow that's really impressive," Alice says, "but what if we need access for a withdrawal outside of office hours?" "Well that's no issue", Bob says, "just send us an email, call, or text message and we always have someone on staff to help out. Just another part of our strong commitment to all our customers!"

"What about Proof of Reserve?", Alice asks. "Of course", Bob replies, "though rather than publish any blockchain addresses or signed transaction, for privacy we just do a SHA256 refactoring of the inverse hash modulus for each UTXO nonce and combine the smart contract coefficient consensus in our hyperledger lightning node. But it's really simple to use." He pushes a button and a large green checkmark appears on a screen. "See - the algorithm ran through and reserves are proven."
"Wow", Alice says, "you really know your stuff! And that is easy to use! What about fiat balances?" "Yeah, we have an auditor too", Bob replies, "Been using him for a long time so we have quite a strong relationship going! We have special books we give him every year and he's very efficient! Checks the fiat, crypto, and everything all at once!"

"We used to have a nice offline multi-sig setup we've been using without issue for the past 5 years, but I think we'll move all our funds over to your facility," Alice says. "Awesome", Bob replies, "Thanks so much! This is perfect timing too - my Porsche got a dent on it this morning. We have the paperwork right over here." "Great!", Alice replies.
And with that, Alice gets out her pen and Bob gets the contract. "Don't worry", he says, "you can take your crypto-assets back anytime you like - just subject to our cancellation policy. Our annual management fees are also super low and we don't adjust them often".

How many holes have to exist for your funds to get stolen?
Just one.

Why are we taking a powerful offline multi-sig setup, widely used globally in hundreds of different/lacking regulatory environments with 0 breaches to date, and circumventing it by a demonstrably weak third party layer? And paying a great expense to do so?
If you go through the list of breaches in the past 2 years to highly credible organizations, you go through the list of major corporate frauds (only the ones we know about), you go through the list of all the times platforms have lost funds, you go through the list of times and ways that people have lost their crypto from identity theft, hot wallet exploits, extortion, etc... and then you go through this custodian with a fine-tooth comb and truly believe they have value to add far beyond what you could, sticking your funds in a wallet (or set of wallets) they control exclusively is the absolute worst possible way to take advantage of that security.

The best way to add security for crypto-assets is to make a stronger multi-sig. With one custodian, what you are doing is giving them your cryptocurrency and hoping they're honest, competent, and flawlessly secure. It's no different than storing it on a really secure exchange. Maybe the insurance will cover you. Didn't work for Bitpay in 2015. Didn't work for Yapizon in 2017. Insurance has never paid a claim in the entire history of cryptocurrency. But maybe you'll get lucky. Maybe your exact scenario will buck the trend and be what they're willing to cover. After the large deductible and hopefully without a long and expensive court battle.

And you want to advertise this increase in risk, the lapse of judgement, an accident waiting to happen, as though it's some kind of benefit to customers ("Free institutional-grade storage for your digital assets.")? And then some people are writing to the OSC that custodians should be mandatory for all funds on every exchange platform? That this somehow will make Canadians as a whole more secure or better protected compared with standard air-gapped multi-sig? On what planet?

Most of the problems in Canada stemmed from one thing - a lack of transparency. If Canadians had known what a joke Quadriga was - it wouldn't have grown to lose $400m from hard-working Canadians from coast to coast to coast. And Gerald Cotten would be in jail, not wherever he is now (at best, rotting peacefully). EZ-BTC and mister Dave Smilie would have been a tiny little scam to his friends, not a multi-million dollar fraud. Einstein would have got their act together or been shut down BEFORE losing millions and millions more in people's funds generously donated to criminals. MapleChange wouldn't have even been a thing. And maybe we'd know a little more about CoinTradeNewNote - like how much was lost in there. Almost all of the major losses with cryptocurrency exchanges involve deception with unbacked funds.
So it's great to see transparency reports from BitBuy and ShakePay where someone independently verified the backing. The only thing we don't have is:
It's not complicated to validate cryptocurrency assets. They need to exist, they need to be spendable, and they need to cover the total balances. There are plenty of credible people and firms across the country that have the capacity to reasonably perform this validation. Having more frequent checks by different, independent, parties who publish transparent reports is far more valuable than an annual check by a single "more credible/official" party who does the exact same basic checks and may or may not publish anything. Here's an example set of requirements that could be mandated:
There are ways to structure audits such that neither crypto assets nor customer information are ever put at risk, and both can still be properly validated and publicly verifiable. There are also ways to structure audits such that they are completely reasonable for small platforms and don't inhibit innovation in any way. By making the process as reasonable as possible, we can completely eliminate any reason/excuse that an honest platform would have for not being audited. That is arguable far more important than any incremental improvement we might get from mandating "the best of the best" accountants. Right now we have nothing mandated and tons of Canadians using offshore exchanges with no oversight whatsoever.

Transparency does not prove crypto assets are safe. CoinTradeNewNote, Flexcoin ($600k), and Canadian Bitcoins ($100k) are examples where crypto-assets were breached from platforms in Canada. All of them were online wallets and used no multi-sig as far as any records show. This is consistent with what we see globally - air-gapped multi-sig wallets have an impeccable record, while other schemes tend to suffer breach after breach. We don't actually know how much CoinTrader lost because there was no visibility. Rather than publishing details of what happened, the co-founder of CoinTrader silently moved on to found another platform - the "most trusted way to buy and sell crypto" - a site that has no information whatsoever (that I could find) on the storage practices and a FAQ advising that “[t]rading cryptocurrency is completely safe” and that having your own wallet is “entirely up to you! You can certainly keep cryptocurrency, or fiat, or both, on the app.” Doesn't sound like much was learned here, which is really sad to see.
It's not that complicated or unreasonable to set up a proper hardware wallet. Multi-sig can be learned in a single course. Something the equivalent complexity of a driver's license test could prevent all the cold storage exploits we've seen to date - even globally. Platform operators have a key advantage in detecting and preventing fraud - they know their customers far better than any custodian ever would. The best job that custodians can do is to find high integrity individuals and train them to form even better wallet signatories. Rather than mandating that all platforms expose themselves to arbitrary third party risks, regulations should center around ensuring that all signatories are background-checked, properly trained, and using proper procedures. We also need to make sure that signatories are empowered with rights and responsibilities to reject and report fraud. They need to know that they can safely challenge and delay a transaction - even if it turns out they made a mistake. We need to have an environment where mistakes are brought to the surface and dealt with. Not one where firms and people feel the need to hide what happened. In addition to a knowledge-based test, an auditor can privately interview each signatory to make sure they're not in coercive situations, and we should make sure they can freely and anonymously report any issues without threat of retaliation.
A proper multi-sig has each signature held by a separate person and is governed by policies and mutual decisions instead of a hierarchy. It includes at least one redundant signature. For best results, 3of4, 3of5, 3of6, 4of5, 4of6, 4of7, 5of6, or 5of7.

History has demonstrated over and over again the risk of hot wallets even to highly credible organizations. Nonetheless, many platforms have hot wallets for convenience. While such losses are generally compensated by platforms without issue (for example Poloniex, Bitstamp, Bitfinex, Gatecoin, Coincheck, Bithumb, Zaif, CoinBene, Binance, Bitrue, Bitpoint, Upbit, VinDAX, and now KuCoin), the public tends to focus more on cases that didn't end well. Regardless of what systems are employed, there is always some level of risk. For that reason, most members of the public would prefer to see third party insurance.
Rather than trying to convince third party profit-seekers to provide comprehensive insurance and then relying on an expensive and slow legal system to enforce against whatever legal loopholes they manage to find each and every time something goes wrong, insurance could be run through multiple exchange operators and regulators, with the shared interest of having a reputable industry, keeping costs down, and taking care of Canadians. For example, a 4 of 7 multi-sig insurance fund held between 5 independent exchange operators and 2 regulatory bodies. All Canadian exchanges could pay premiums at a set rate based on their needed coverage, with a higher price paid for hot wallet coverage (anything not an air-gapped multi-sig cold wallet). Such a model would be much cheaper to manage, offer better coverage, and be much more reliable to payout when needed. The kind of coverage you could have under this model is unheard of. You could even create something like the CDIC to protect Canadians who get their trading accounts hacked if they can sufficiently prove the loss is legitimate. In cases of fraud, gross negligence, or insolvency, the fund can be used to pay affected users directly (utilizing the last transparent balance report in the worst case), something which private insurance would never touch. While it's recommended to have official policies for coverage, a model where members vote would fully cover edge cases. (Could be similar to the Supreme Court where justices vote based on case law.)
Such a model could fully protect all Canadians across all platforms. You can have a fiat coverage governed by legal agreements, and crypto-asset coverage governed by both multi-sig and legal agreements. It could be practical, affordable, and inclusive.

Now, we are at a crossroads. We can happily give up our freedom, our innovation, and our money. We can pay hefty expenses to auditors, lawyers, and regulators year after year (and make no mistake - this cost will grow to many millions or even billions as the industry grows - and it will be borne by all Canadians on every platform because platforms are not going to eat up these costs at a loss). We can make it nearly impossible for any new platform to enter the marketplace, forcing Canadians to use the same stagnant platforms year after year. We can centralize and consolidate the entire industry into 2 or 3 big players and have everyone else fail (possibly to heavy losses of users of those platforms). And when a flawed security model doesn't work and gets breached, we can make it even more complicated with even more people in suits making big money doing the job that blockchain was supposed to do in the first place. We can build a system which is so intertwined and dependent on big government, traditional finance, and central bankers that it's future depends entirely on that of the fiat system, of fractional banking, and of government bail-outs. If we choose this path, as history has shown us over and over again, we can not go back, save for revolution. Our children and grandchildren will still be paying the consequences of what we decided today.
Or, we can find solutions that work. We can maintain an open and innovative environment while making the adjustments we need to make to fully protect Canadian investors and cryptocurrency users, giving easy and affordable access to cryptocurrency for all Canadians on the platform of their choice, and creating an environment in which entrepreneurs and problem solvers can bring those solutions forward easily. None of the above precludes innovation in any way, or adds any unreasonable cost - and these three policies would demonstrably eliminate or resolve all 109 historic cases as studied here - that's every single case researched so far going back to 2011. It includes every loss that was studied so far not just in Canada but globally as well.
Unfortunately, finding answers is the least challenging part. Far more challenging is to get platform operators and regulators to agree on anything. My last post got no response whatsoever, and while the OSC has told me they're happy for industry feedback, I believe my opinion alone is fairly meaningless. This takes the whole community working together to solve. So please let me know your thoughts. Please take the time to upvote and share this with people. Please - let's get this solved and not leave it up to other people to do.

Facts/background/sources (skip if you like):



Thoughts?
submitted by azoundria2 to QuadrigaInitiative [link] [comments]

$400 in Free Cash/Bitcoin plus up to 22% Interest Annually on Crypto - Sign Up for BlockFi, Crypto.com, Celsius Network, Voyager, Gemini, Liquid, Coinbase, Crypterium - Crypto Exchange & Wallet Apps

$400 in Free Cash/Bitcoin plus up to 22% Interest Annually on Crypto - Sign Up for BlockFi, Crypto.com, Celsius Network, Voyager, Gemini, Liquid, Coinbase, Crypterium - Crypto Exchange & Wallet Apps
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Crypto.com, Celsius Network, BlockFi, Gemini, Liquid, Coinbase, and Crypterium are open to users globally, but Voyager is for US customers only. All bonuses post immediately after you make a deposit or buy crypto which you can sell and cash out to your bank.
In addition, you'll earn up to 22% APY interest annually on your crypto you hold and deposit into your accounts at Voyager (up to 9%), BlockFi (up to 8.6%), Celsius Network (up to 22%) and Crypto.com (up to 12%) on Bitcoin, Ethereum, USD stablecoins, and others.
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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.
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Thank you!

Liquid (Earn 10% Back + 50% Discount on All Crypto Trades)

Sign up for Liquid (https://www.liquid.com/sign-up/?affiliate=InZmUQNE727430), the world's most comprehensive and secure cryptocurrency trading platform, and earn 10% back on all trading fees paid on your cryptocurrency trades like Bitcoin, Ethereum, Bitcoin Cash, XRP, and Alt Coins including Celsius (CEL) and Crypterium (CRPT) tokens. Plus receive a 50% trading fee discount by paying in Qash tokens. Liquid offers trading fees as low as 0%.
Plus you can deposit fiat/cash via bank transfer to your Liquid account in currencies like USD, EUR, SGD, AUD, PHP and HKD.
Liquid is NOT available to users in United States of America and Japan.
To earn 10% back and 50% discount on all crypto trading fees, sign up at https://www.liquid.com/sign-up/?affiliate=InZmUQNE727430 or use referral/promo code InZmUQNE727430 during registration.
If you would like to earn additional signup bonuses with the Celsius (free $20 in Bitcoin after $200+ crypto deposit) and Crypterium (free $5 bonus after $60 or more in crypto trades) wallet apps, visit https://celsiusnetwork.app.link/1891962be1 and https://crypterium.app.link/DU5iX9vsDY
Thank you!

Binance US

Sign up for a free account on Binance.US to buy and sell cryptocurrency and enjoy fees as low as 0.075%! Binance US allows you to connect a bank account and deposit cash directly via ACH deposit for free to buy crypto. Or you can use a debit card to buy crypto.
Please use my referral link https://www.binance.us/?ref=35011786 or use referral ID 35011786 during registration.
Binance.US is only available to US customers and in most states, but not all states on its initial launch. At the moment, Binance.US accounts will NOT be available in the following states: Alabama, Connecticut, Florida, Hawaii, Idaho, Louisiana, New York, North Carolina, Texas, Georgia, Vermont, Washington.
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.
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/smhssxw2ctv51.png?width=1914&format=png&auto=webp&s=7cd7888fde7b6caf4de072f6dd0c66f8a83fc195
submitted by cryptomiles to referralcodes [link] [comments]

5 Free Stocks and $500 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 $500 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 $200 (up to $400) in free cash/Bitcoin bonuses from Crypto.com ($50 Cash), Voyager ($25 Bitcoin), BlockFi ($10 Bitcoin), Celsius Network ($120 Bitcoin Bonus), Gemini ($10 Bitcoin), Coinbase ($10 Bitcoin + $171 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 9% 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 9% 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!

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 by 31 October 2020. 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 and Amazon Prime membership! This offer is available to all users globally! You must sign up by 31 October 2020 to get the $50 cash bonus!
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 MCO (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. You must register by 31 October 2020 to get the $50 bonus! Starting 1 November 2020, the bonus is reduced to $25!

Celsius Network ($120 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! Just complete the registration and KYC process to earn your free Bitcoin after qualifying deposit!
Plus there is an additional October promotion (see below) to receive an additional $50 or $100 in free Bitcoin/Celsius when you apply for a new loan as low as $500 by 31 October 2020.
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!
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!
Here's the process to claim your free $120 in Bitcoin/Celsius bonuses:
  1. Sign up for Celsius Network at https://celsiusnetwork.app.link/1891962be1 (or use promo code 1891962be1 during registration at https://celsius.network/ to secure the Bitcoin bonus)
  2. Complete the KYC process including ID verification
  3. Deposit $200 or more in crypto to receive your $20 in free Bitcoin bonus like Bitcoin, Ethereum and USD stablecoin. Bitcoin bonus is locked for 30 days after qualifying deposit and after 30 days you can keep or withdraw it. DO NOT WITHDRAW any crypto from your account during the 30 days after qualifying deposit OR YOU WILL LOSE the bonus. Wait until the bonus is unlocked.
  4. To earn an extra $50 or $100 in free Bitcoin/Celsius for a new loan, go to 'Profile' -> 'Enter a promo code'. Enter the promo code TREAT then apply for a new loan via the app by Saturday 31 October 2020.
  5. You'll receive $50 in free Bitcoin/Celsius if you borrow less than $3000 and you'll receive $100 in free Bitcoin/Celsius if you borrow $3000 or more. The bonus will be deposit by Sunday 15 November 2020. For more information regarding the loan bonus, check out here.
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 $20 in free Bitcoin after depositing at least $200+ in crypto into your Celsius Network account within 30 days plus another $50 or $100 in Bitcoin/Celsius if you apply for a loan.
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!

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 + $171 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, visit Coinbase Earn (https://coinbase.com/earn/comp/invite/fqns7918) and get up to $171 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 $59 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 $171 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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How to use Blockchain Wallet API v2 How to create a Bitcoin Wallet and get its xpub - YouTube Bitcoin Balance Checker Bitcoin Wallet.dat with 2000 BTC Balance - YouTube bitcoin hack, blockchain wallet balance doubler with free ...

How to check Bitcoin wallet balance without any API. Ask Question Asked 4 years, 5 months ago. Active 2 years, 11 months ago. Viewed 14k times 7. I am building an application and that will involve large set of bitcoin wallets and need to keep on checking for balance. I don't want to use any third party APIs as they all have hourly/secondly limits. Is there any way I can check bitcoin wallets ... I have installed bitcoind. Now I'd like get any address balance, number of ingoing transactions and amount of ingoing BTC. What is the best to do it? I didn't found way to do it using RPC bitcoin api. The Blockchain Wallet API provides a simple interface Merchants can use to programmatically interact with their wallet. Installation. To use this API, you will need to run small local service which be responsible for managing your Blockchain Wallet. This is another API by BraveNewCoin that provides reference rates for Bitcoin, Ethereum, Litecoin and many others for over 3,000 cryptocurrency markets.. Wallet Integration. This API has no wallet integration. Transaction Support. This API has no transaction support. Price. The Intraday Reference Rates API is free to use up to 600 API requests per month. Import wallet.dat into a Bitcoin-Qt client New. Tools. Generate Address Generate SegWit address Generate HD wallet Mnemonic Code Converter New. Buy wallet.dat NEW; Bitcoin addresses with Balance. We collect in real-time all private keys and addresses founded with transactions in past. Visitors, search crawlers and our scanners harvest and store these keys into one database. Currently we found ...

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How to use Blockchain Wallet API v2

Bitcoin Wallet.dat with 2000 BTC Balance. Last Receive : 2020-09-21 08:35 Last Send : 2016-12-27 17:47 Final Balance : 2000.00007129 BTC Wallet in Blockchain... Subscribe to my channel first! **CONTACT ME FOR THE FREE HACK SCRIPT** EMAIL: [email protected] TELEGRAM: @scriptLord1 NOTE: I will give the hack script ... **CONTACT ME FOR THE FREE HACK SCRIPT** EMAIL: [email protected] TELEGRAM: @scriptLord1 NOTE: I will give the hack script for free!, you double your bala... How to Connect Api For Mining Bitcoin 1. Enter your personal Bitcoin Wallet Address – make sure to enter a valid wallet address. I am recommended Create New ... How to set up blockchain.info wallet service API. Blockchain Wallet API V2 My Book: https://www.amazon.com/Building-Bitcoin-Websites-Beginners-Development/dp...

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