GitHub - subhan-nadeem/bitcoin-mining-python: A Python ...

More fun with OP_HODL (CheckLockTimeVerify)

Last week I wrote a post with a script to create a HODL address. A HODL address is a UTXO that cannot be spent until a certain epoch time or blocktime. It can be used to secure funds in a will or trust that has a designated maturity date. Or you may have some other reason to lock the funds, the point is that the UTXO can be physically verified to be funded, and under an unbreakable timelock.
I've liked the feature but have been frustrated that there is limited HW and SW wallet support for it presently. My previous post walked through how to make a segwit HODL UTXO, this post will detail how to make a BIP16 legacy P2SH HODL UTXO.
Similar to last week, I wrote a bitcoinlib script to do it, but this week I also went through the steps to do it on the CoinBin wallet. CoinBin is a JavaScript wallet that can (and should) be run locally. CoinBin, or raw python (bitcoinlib) are the only ways I currently know of to spend a HODL address.
Here's the basic rundown to create and fund your UTXO with CoinBin
  1. Use either Electrum or Bitcoin Core to collect a Bitcoin public and private key.
  2. Run the CoinBin app either locally (best option) or through the live site
  3. Choose New -> Time Locked Address
  4. Enter the public key (from #1) and either a block height or timestamp for your lock
  5. Hit Submit and record the address and redeem script
  6. Ensure you have accurately recorded everything in step #1 and step #5
  7. Send funds to the address recorded in step 5 as you normally would.
Here's the basic rundown on how to spend your UTXO with CoinBin
  1. Use either Electrum or Bitcoin Core to collect an address to spend your UTXO to
  2. Run the CoinBin app either locally (best option) or through the live site
  3. Choose New -> Transaction
  4. Enter the Redeem Script you copied in the creation process (step #5), then Load
  5. After a few minutes it should automatically load your UTXO into the form
  6. Enter the address you want to spend your UTXO to and adjust the output amount for fees
  7. Hit the question mark next to Transaction Fee for the calculator
  8. Hit Submit when satisfied and record the unsigned transaction data
  9. Select Sign on the top nav bar to begin the signing operation
  10. Enter your private key from the creation process (step #1) and the unsigned TXN
  11. Select Submit to produce the signed TXN
  12. Broadcast the signed TXN with either Electrum or Bitcoin Core
Note, if you try to broadcast before the UTXO's timelock expires, you will get a terse not final error in either Electrum or Core.
For Extra Credit, CoinBin can also be run against Testnet, but to do so you have to unhide the settings element, manually code the TXN input script and manually code the TXN nLockTime to sync with your HODL address.
Here are a Testnet and Mainnet HODL spend TXN I created in CoinBin * Mainnet: txid ea6a1...79d53 * Testnet: txid a8110...adc93
submitted by brianddk 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]

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submitted by ViralMedia007 to FREECoursesEveryday [link] [comments]

Checker Thread (A list of hacked clients for easy reference)

Community contribution is the only way this thread will be useful. This is a WIP! More clients will be added as time goes on!
Quick note: The vast majority of these are files supplied by the community -- some may not work. The person who sent me 9b9t says it doesn't work, but I have not personally tested. Please let me know if it works or does not work.

Some additional notes:
I am open to community criticism so long as it can actually be used to benefit the thread. Issues with formatting, approach, client choice, etc. are all great things to come talk to me about so I may improve. However, people keep commenting the same things over and over and over — “VirusTotal can’t catch X” is a popular one — and I don’t have time to deal with it. If you have a security concern, you are more than welcome to raise it. HOWEVER, do not make unreasonable requests of me — I work, in addition to that I have a social life, I have responsibilities at home as well. This is a side thing that I do when I have the time. A lot of people have suggested looking through bytecode to determine if a client is malicious. I do not have the time to do this for every client. If you are willing to help and do more than say “you should do more than you already are, even though you have a job and a life outside of an obscure subreddit,” feel free to DM me. People who take the broken record approach and say things that are already covered in the thread, or refuse to offer help and just post complaints, will be blocked and ignored. I’m all down for making this post better, but I’m not gonna waste my time with people who won’t work with me. Thank you for your help!

BIG THANKS TO u/jpie726 FOR HIS MASSIVE CONTRIBUTIONS! WITHOUT HIM THIS LIST WOULD BE SIGNIFICANTLY LESS EXPANSIVE. GO UPVOTE THIS MAN INTO HEAVEN, HE DESERVES IT!

Eventually I would like to make a Python script that takes care of all the necessary tasks to install these clients. Python itself is available through the Windows Store as well as on Python's website, or through various other installers. It will install any additional dependencies via Pip and will use Curl to retrieve the files. Anyone interested in helping with this script is more than welcome to do so, if you wish. The two options for assisting me would be as follows:
1. You can install Visual Studio Code or Atom and work with me directly through those applications (more details soon™)
2. A GitHub page may be made and you could submit pull requests through that and edit the script alone.

#######################################################################
There is a misconception that I am only here for free paid clients.
1. I can't use a paid client unless I have access to a cracked version, an account, and the HWID bound to said account.
2. People are also saying there's a way for clients to track if someone leaks them. While I suppose this is possible if they bothered to put in the absurd amount of effort it would take, it would give them no benefit and it would do no good as I am not running the software on my desktop -- I am sending the software to VirusTotal, grabbing the SHA-256 checksum, and deleting the file.
3. If all you're going to do is post that "VirusTotal can't catch x" or "muh client" do not waste my time, and don't waste yours. You will be ignored in favor of people who will actually help me construct what I hope to be a megathread for this subreddit, FOR YOU GUYS. I mean jeez, someone's trying to help and half the fucking responses are "muh client" like come on. No wonder this fucking subreddit is dead, sheesh. If someone's trying to help you and you just step on their toes that's just not very cool, not everyone is trying to scam you. I do just be trying to help people who come here doe.
4. If you have concerns, raise them respectfully. Do not attack me, you will be ignored or if I feel so inclined I will give you 110% of the shit you give me right back to you. I will answer questions, I will elaborate on my goals, I will take helpful advice. Everything else will be outright ignored, and misinformation will be countered. That is all, thread below.
#######################################################################

I named this the Checker Thread to make it easy to search for in the subreddit. Enjoy.Below will be a list of hacked clients, with VirusTotal links, SHA-256 hashes, direct download links (skipping ad pages) and eventually features for each client. I'd also like to add what servers they do and don't work on, but I need the community to help with that.
The only client I use is Impact, send me additional clients in the comments and they will be added to this list.

Note about SHA-256 hashes:
SHA-256 hashes are a hash of a file produced algorithmically. This type of hash was developed by the United States National Security Agency, and is typically used to verify that files are what they are supposed to be. Widely used in cryptographic applications such as SSH, APT repositories, transactions on websites, verifying files, Bitcoin, and more. It is very common. This type of cryptographic hash has been in use since 2001. An SHA-256 hash will be the exact same for the same file regardless of the source of the file, so if your hash is different from the one listed here you do not have the legitimate installer OR the hash is not up-to-date.

Note about VirusTotal tests:
Several people have pointed out to me something I feel should be brought up in the main thread. VirusTotal is not a catch-all, just as your typical antivirus software is not a catch-all. It will not catch everything. It should be used as a general guideline only. Clean VirusTotal tests do not guarantee your safety, although if the program passes all ~70 or so antivirus engines it's probably safe to use. Any additional malicious activity should be caught by your antivirus program's heuristics. I take no responsibility for anything that is malicious, but I can say in good conscience that I have done everything I can to ensure that everything on this thread is safe. Keep in mind that programs that trip VirusTotal may still be safe to use, antivirus programs often pick up injectors as malware or Trojans because that's how those types of viruses behave in the real world. Use your best judgement. If your best judgement is not good enough, do not use these programs. You have been warned.

----- C --- L --- I --- E --- N --- T--- S ------ C --- L --- I --- E --- N --- T--- S ------ C --- L --- I --- E --- N --- T--- S -----

Impact | 1.11.2 to 1.15.2 | Java Edition
VirusTotal Link for *.exe Installer | VirusTotal Link for *.jar Installer
SHA-256 Hash: 4EAFFB99759FBD949D0FBEF58AE9CEB45CE8CA2B0D7DC22147D4FF0E46F010EC
Impact triggered 0/72 engines on both installers.
Direct Link to Impact's *.exe Installer | Direct Link to Impact's *.jar Installer
------------------------------------------------------------------------------------------------------------------------------------------------

Sigma | 1.8 to 1.16 | Java Edition
VirusTotal Link for *.jar Installer | VirusTotal Link for the *.zip the Installer is Contained In
SHA-256 Hash for the *.zip file: 3FCD397849358522BF0EEEAF117487DBA860919900A904551DF512BE2C34B48C
Sigma's *.zip file triggered 0/59 engines on the *.zip file.
Sigma's *.jar file triggered 0/60 engines on the *.jar file.
Direct Link to Sigma's *.zip File that Contains the Installer
------------------------------------------------------------------------------------------------------------------------------------------------

9b9t | 1.12.2, needs testing | Java Edition | Forge Mod
VirusTotal Link for the *.jar Forge Mod
SHA-256 Hash: 30E4F2778688D54CE7992AFDE509460A7BDDBDA77800219083D4D12BC696EEA0
9b9t triggered 0/60 engines.
AnonFile link to 9b9t's *.jar Mod
------------------------------------------------------------------------------------------------------------------------------------------------

Ingrosware | 1.12.2 | Java Edition | Forge Mod
VirusTotal Link for the *.jar Forge Mod
SHA-256 Hash: BD1A0F9079F4C834A251163C3A0ECBFF7DFC28AB00CF1C74008AADD042FAD358
Ingrosware triggered 0/59 engines.
AnonFile link to a pre-built *.jar Mod
Note: Ingrosware is open source, and is available on GitHub. If you want to build it yourself, you can do so here.
------------------------------------------------------------------------------------------------------------------------------------------------

Mercury | 1.12.2 | Java Edition | Forge Mod
VirusTotal Link for the *.jar Forge Mod
SHA-256 Hash: 70E585A94218149970410ACAE5BE7C1C1B731140F1AF55FE2D1292B1CA74DCB9
Mercury triggered 0/60 engines.
AnonFile link to Mercury's *.jar Mod
------------------------------------------------------------------------------------------------------------------------------------------------

Atlas | 1.12.2 | Java Edition | Forge Mod | Use with caution!
VirusTotal Link for the *.jar Forge Mod
SHA-256 Hash: 7AEB7220CBD5D7C4E4421A940357F14EC70B18DB905469E288529FE3A2C04D57
Note: The file is called AceHackGold-n3.0-release.jar in VirusTotal. The client is identified as Atlas in the .nfo file it came bundled with.
Atlas triggered 7/59 engines.
Note: Upon closer inspection of the VirusTotal scan, the client appears to be of the injected flavor. Injectors are commonly a false positive Trojan. The client appears to be safe, and there was nothing particularly noteworthy in the VirusTotal scan that is atypical for an injector. While this makes the file appear to be safe, use with caution.
AnonFile Link for the *.jar Mod
Note: This is a cracked client! The crack is pre-done, so no additional work is required to use -- just put it in your Forge Mods folder and click play.
Note 2: The file downloaded is called AceHackGold-n3.0-release.jar*, I'm not sure why. This file was community-sourced, but it has been inspected in the same manner as all the others*.
------------------------------------------------------------------------------------------------------------------------------------------------

Atom | 1.12.2 | Java Edition | Forge Mod | Use with extreme caution!
VirusTotal Link for the *.zip the Forge Mod is Contained In
SHA-256 Hash: 3B43F952EB5B14F2B01592057B27E92B0E38B6874EA10B8E893BFCBC71463377
Note: The file is called output.157312297.txt in VirusTotal. In addition, VirusTotal identifies the file type properly (\.zip).*
Atom triggered 9/59 engines.
Note: Upon closer inspection of the VirusTotal scan, the client accesses numerous registry keys, which is a behavior I personally would consider to be unnecessary and incredibly suspicious. You can find more information in the VirusTotal scan. The client also exhibits typical Trojan false-positives.
AnonFile Link for the *.zip File
Note: This is a cracked client! The crack is pre-done, so no additional work is required to use -- just put it in your Forge Mods folder and click play.
Use this client with extreme caution. There are behaviors that I consider to be extremely suspicious, you must determine for yourself if it's safe to use however. This may just be how the client works. I do not know, and I can't be bothered to test it.
------------------------------------------------------------------------------------------------------------------------------------------------

Aurora | 1.12.2 | Java Edition | Forge Mod
VirusTotal Link for the *.zip the Forge Mod is Contained In
SHA-256 Hash: 9A66929B629AB076383340D33E0EF9B8CE221679EF79315240EA6C760651A533
Aurora triggered 0/61 engines.
AnonFile Link for the *.zip File
Note: This is a cracked client! The crack is pre-done, so no additional work is required to use -- just put it in your Forge Mods folder and click play.
------------------------------------------------------------------------------------------------------------------------------------------------

CandyCat | 1.12.2 | Java Edition | Forge Mod | Use with caution!
VirusTotal Link for the *.zip the Forge Mod is Contained In
SHA-256 Hash: 8CEC2F9F28AA3957504E0CC66BF1516080C7BAC50EADB54DC6DD97E0E6E9C745
CandyCat triggered 9/61 engines.
Note: Upon closer inspection of the VirusTotal scan, the client appears to be of the injected flavor. Injectors are commonly a false positive Trojan. The client appears to be safe, and there was nothing particularly noteworthy in the VirusTotal scan that is atypical for an injector. While this makes the file appear to be safe, use with caution.
AnonFile Link for the *.zip File
Note: This is a cracked client! The crack is pre-done, so no additional work is required to use -- just put it in your Forge Mods folder and click play.
------------------------------------------------------------------------------------------------------------------------------------------------

DayNightGod | 1.12.2 | Java Edition | Forge Mod | Use with caution!
VirusTotal Link for the *.zip the Forge Mod is Contained In
SHA-256 Hash: 9CEEB43476B18149C0DA76B7AE94713AAF60ED4D2BFD2339E863CC46A1808A0D
DayNightGod triggered 1/59 engines.
Note: Upon closer inspection, only one engine was triggered. The client did not trigger the usual false-positives of a Trojan, use with caution.
AnonFile Link for the *.zip File
Note: This is a cracked client! The crack is pre-done, so no additional work is required to use -- just put it in your Forge Mods folder and click play.
------------------------------------------------------------------------------------------------------------------------------------------------

HyperLethal | 1.12.2 | Java Edition | Forge Mod | Use with caution!
VirusTotal Link for the *.zip the Forge Mod is Contained In
SHA-256 Hash: 77FACC1FDB0415438963CCC8DDB4081958563AAA962CE9C024E5063DA32E8FAD
HyperLethal triggered 2/59 engines.
Note: Upon closer inspection of the VirusTotal scan, the client appears to be of the injected flavor. Injectors are commonly a false positive Trojan. The client appears to be safe, and there was nothing particularly noteworthy in the VirusTotal scan that is atypical for an injector. While this makes the file appear to be safe, use with caution.
AnonFile Link for the *.zip File
Note: This is a cracked client! The crack is pre-done, so no additional work is required to use -- just put it in your Forge Mods folder and click play.
------------------------------------------------------------------------------------------------------------------------------------------------

LoveClient | 1.12.2 | Java Edition | Forge Mod | Use with extreme caution!
VirusTotal Link for the *.zip the Forge Mod is Contained In
SHA-256 Hash: C71EC42FF612D75CB7AA21B8400D164A74AAD9BB65D2DFEE232461DAF98034C2
LoveClient triggered 9/61 engines.
Note: Upon closer inspection of the VirusTotal scan, the client accesses numerous registry keys, which is a behavior I personally would consider to be unnecessary and incredibly suspicious. You can find more information in the VirusTotal scan. The client also exhibits typical Trojan false-positives.
AnonFile Link for the *.zip File
Use this client with extreme caution. There are behaviors that I consider to be extremely suspicious, you must determine for yourself if it's safe to use however. This may just be how the client works. I do not know, and I can't be bothered to test it.
------------------------------------------------------------------------------------------------------------------------------------------------

SnowHack | 1.12.2 | Java Edition | Forge Mod
VirusTotal Link for the *.zip the Forge Mod is Contained In
SHA-256 Hash: 7100C8D59CE06B279F7D03D834FC2C361F10BEAE913575FC7EFA74E498167D2C
SnowHack triggered 10/62 engines.
Note: Upon closer inspection of the VirusTotal scan, the client appears to be of the injected flavor. Injectors are commonly a false positive Trojan. The client appears to be safe, and there was nothing particularly noteworthy in the VirusTotal scan that is atypical for an injector. While this makes the file appear to be safe, use with caution.
AnonFile Link for the *.zip File
Note: This is a cracked client! The crack is pre-done, so no additional work is required to use -- just put it in your Forge Mods folder and click play.
------------------------------------------------------------------------------------------------------------------------------------------------
submitted by Daemris to minecraftclients [link] [comments]

Windows / Linux Guide to using Trezor with Bitcoin Core (HWI)

This is a guide to using your Trezor with Bitcoin Core. It may seem like more trouble than it's worth but many applications use Bitcoin Core as a wallet such as LND, EPS, and JoinMarket. Learning how to integrate your Trezor into a Bitcoin Core install is rather useful in many unexpected ways. I did this all through the QT interfaces, but it's simple to script. There is a much simpler guide available from the HWI github, and the smallest Linux TLDR is here
Unfortunately, I don't have access to a Coldcard or Ledger. I'm not sure how the setpin or -stdinpass parameters are handled on that HW.

( A ) Install TrezorCTL, HWI, and build GUI

You only need to set the wallet up once, but may repeat to upgrade

( A.I ) Download extract and install HWI

  1. Download and isntall Python
  2. Download https://github.com/bitcoin-core/HWI/archive/1.1.2.zip
  3. Extract it to a working folder (assumes C:\User\Reddit\src\HWI)
  4. Change Directory (cd) to working folder cd "C:\User\Reddit\src\HWI"
  5. Setup venv python -m venv .venv
  6. Enter venv .venv\Scripts\activate.bat 1
  7. Install dependencies python -m pip install -U setuptools pip wheel
  8. Install TrezorCTL python -m pip install trezor[hidapi]
  9. Install HWI python -m pip install hwi pyside2
  10. Download github.com/libusb/libusb/releases/download/v1.0.23/libusb-1.0.23.7z
  11. Extract MS64\dll\libusb-1.0.dll from the archive
  12. Copy to pywin copy libusb-1.0.dll .venv\Lib\site-packages\pywin32_system32\

( A.II ) Build the QT UI files

  1. Download and install MSYS2
  2. Launch a mingw64.exe shell
  3. CD to working folder cd "C:\User\Reddit\src\HWI"
  4. Enter venv source .venv/Scripts/activate 1
  5. Run UI build bash contrib/generate-ui.sh

( B ) Create a Trezor wallet in Bitcoin Core (testnet)

You only need to set the wallet up once, no private key data is stored, only xpub data

( B.I ) Retrieve keypool from HWI-QT

  1. Launch hwi-qt.exe --testnet (assuming testnet)
  2. Click Set passphrase (if needed) to cache your passphrase then click Refresh
  3. Select you trezor from the list then click Set Pin (if needed)
  4. Ensure your Trezor in the dropdown has a fingerprint
  5. Select Change keypool options and choose P2WPKH
  6. Copy all the text from the Keypool textbox

( B.II ) Create the wallet in Bitcoin QT

  1. Launch Bitcoin Core (testnet) (non-pruned) 2
  2. Select Console from the Window menu
  3. Create a wallet createwallet "hwi" true
  4. Ensure that hwi is selected in the console wallet dropdown
  5. Verify walletname using the getwalletinfo command
  6. Import keypool importmulti '' (note ' caging)
  7. Rescan if TXNs are missing rescanblockchain 3

( C.I ) Grab Tesnet coins

  1. Select the Receive tab in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Select Create new receiving address and copy address
  4. Google "bitcoin testnet faucet" and visit a few sites
  5. Answer captcha and input your addressed copied from C.I.3

( D ) Spending funds with HWI

This is how you can spend funds in your Trezor using Bitcoin Core (testnet)

( D.I ) Create an unsigned PSBT

  1. Select the Send tab in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Verify your balance in Watch-only balance
  4. Rescan if balance is wrong (see B.II.7) 3
  5. Craft your TXN as usual, then click Create Unsigned
  6. Copy the PSBT to your clipboard when prompted

( D.II ) Sign your PSBT

  1. In HWI-QT click Sign PSBT
  2. Paste what you copied in D.I.6 in PSBT to Sign field
  3. Click Sign PSBT
  4. Copy the text for PSBT Result

( D.III ) Broadcast your TXN

  1. Select the Console window in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Finalize PSBT: finalizepsbt
  4. Copy the signed TXN hex from the hex field returned
  5. Broadcast TXN: sendrawtransaction

Final Thoughts

I did this all through the GUI interfaces for the benefit of the Windows users. Windows console is fine, but the quote escaping in windows console is nightmarish. Powershell would be good, but that throws this on a whole another level for most Windows folks.
There is also the need to use HWI-QT due to a bug in blank passphrases on the commandline. You can work around it by toggling passphrase off or on, but again, it's more than I wanted to spell out.
Footnotes:
  • 1. - Later version of python put the activate script under 'bin' instead of 'Script'
  • 2. - You can run pruned, but you need to have a fresh wallet
  • 3. - Rescan is automatic on 'importmulti' but I was pruned so it was wierd
submitted by brianddk to Bitcoin [link] [comments]

Multiple DHT22 Sensors

Hello all, first thing first, I am a computer repair technician at a Bitcoin mining facility. We have about 20,000 bitcoin miners that me and my coworkers are in charge of monitoring and repairing. So with that being said I am pretty much lost when it comes to python and servers and things of that sort.Everyone that has dealt with computers/electronics know that heat is a huge issue. And heat is a killer to bitcoin miners,so monitoring the temperature and humidity in the facility is crucial so we can control the waterwalls and such as needed .I have successfully set up 14 raspberry pis with DHT22 sensors by copying and pasting scripts that I found online. They are reporting to a website through POST method. The readings are shown on a barchart,but is not dynamic so it only shows 1 reading at a time. I have been tasked with setting up a way to get all the sensors reading to a single server,then pulling the data from the server onto a D3.js grouped bar chart . Now, there is 14 Pis and each is set to read every mintue. These will be running 24/7 so there will be alot of readings. My question,actually a few questions is I am needing to set up 1 Pi as a dedicated server receiving all the readings. 1)What would be the best way to set that up,I have read that a MQTT server is the easiest but cant handle a lot of data(which I will have)I was thinking about a MySql. 2)Would I need to attach extra storage to this Pi to handle all the data. 3) How do I send all the readings to the server Pi(NOTE: they will all be on the same network) 4) How would I pull all this information from the server and input it into a D3.js grouped bar chart. Do I need to have a web server installed on the Pi?. I'm not expecting a step by step answer, and I am on a timeline and honestly dont have time to learn pythhon,html,php,sql or whatever is needed for this. All I am asking is for is a step in the right direction, thanks to all that read this and any information will be greatly appreciated
submitted by AbsentGalaxy to RASPBERRY_PI_PROJECTS [link] [comments]

Python script to take a value off a website and send it to a email or text?

I was wondering if there was anyway to make a python script to take a said value from a website, in my case a offline number that is on a website that refreshes every 5 minutes. I would like to have it set up if that value drops it would either send me and email or a text message. Reason I am wanting to do this is because I work at a bitcoin mining facility that has over 15,000 miners and we have to monitor them constantly. But carrying around a laptop while performing daily tasks is very aggravating and annoying. I know very little about python so if someone could point me in the right direction I would greatly appreciate it. Thanks
submitted by AbsentGalaxy to learnpython [link] [comments]

Connect via python script to mynode

To learn about bitcoin I wrote a script in python to send transactions to a full node. I connect to a node via
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) HOST = "1.2.3.4" PORT = 8333 s.connect((HOST, PORT))
That works all fine. What do I now need to do to talk to my mynode using the python script? I only have my local ip and the onion adress and can't figure out how to feed that into python in order to send a tx to my own full node.
Any suggestions?
submitted by bucadoX to mynodebtc [link] [comments]

[Hiring] (San Francisco, CA) Senior Kubernetes Engineer paying up to $210k base

A cryptocurrency start-up with an Infrastructure team in downtown San Francisco is looking for a Kubernetes Engineer to join the growing team. This bootstrap start-up builds a real-time trading platform for digital currencies. Doing over half a billion dollars of Bitcoin transactions a day this start-up does more Bitcoin (BTC) trading than any other platform in the world.
Due to the COVID-19 pandemic, this position is temporarily 100% remote. Once both the state and company determine that it is safe to work, the Senior Kubernetes Engineer will be expected to work in the San Francisco office.
Reporting directly to the Head of DevOps, this Senior Kubernetes Engineer will partner closely with the other DevOps and Kubernetes Engineers on the Infrastructure team to improve internal k8s components and applications across multiple clusters and troubleshoot issues as needed. The Senior Kubernetes Engineer will also play a consultative role and collaborate with the Security, Front End, and Engineering teams.
Tech environment also includes AWS, Terraform, Chef, Golang, Python, Prometheus, Docker, Github, and uses GitOps paradigm.

Required Skills & Experience

Desired Skills & Experience

What You Will Be Doing

Tech Breakdown
Daily Responsibilities

The Offer

You will receive the following benefits:
Applicants must be currently authorized to work in the United States on a full-time basis now and in the future.
This position does not offer sponsorship.
Jobspring Partners, part of the Motion Recruitment network, provides IT Staffing Solutions (Contract, Contract-to-Hire, and Direct Hire) across 10 major North American markets. Our unique expertise in today’s highest demand tech skill sets, paired with our deep networks and knowledge of our local technology markets, results in an exemplary track record with candidates and clients.
Interested in applying? Please send an email with your resume to [email protected]
submitted by John-ODell to sysadminjobs [link] [comments]

Windows Guide to using Trezor with Bitcoin Core (HWI)

This is a guide to using your Trezor with Bitcoin Core. It may seem like more trouble than it's worth but many applications use Bitcoin Core as a wallet such as LND, EPS, and JoinMarket. Learning how to integrate your Trezor into a Bitcoin Core install is rather useful in many unexpected ways. I did this all through the QT interfaces, but it's simple to script. There is a much simpler guide available from the HWI github, and the smallest TLDR is here

( A ) Install TrezorCTL, HWI, and build GUI

You only need to set the wallet up once, but may repeat to upgrade

( A.I ) Download extract and install HWI

  1. Download and isntall Python
  2. Download https://github.com/bitcoin-core/HWI/archive/1.1.2.zip
  3. Extract it to a working folder (assumes C:\User\Reddit\src\HWI)
  4. Change Directory (cd) to working folder cd "C:\User\Reddit\src\HWI"
  5. Setup venv python -m venv .venv
  6. Enter venv .venv\Scripts\activate.bat 1
  7. Install dependencies python -m pip install -U setuptools pip wheel
  8. Install TrezorCTL python -m pip install trezor[hidapi]
  9. Install HWI python -m pip install hwi pyside2
  10. Download github.com/libusb/libusb/releases/download/v1.0.23/libusb-1.0.23.7z
  11. Extract MS64\dll\libusb-1.0.dll from the archive
  12. Copy to pywin copy libusb-1.0.dll .venv\Lib\site-packages\pywin32_system32\

( A.II ) Build the QT UI files

  1. Download and install MSYS2
  2. Launch a mingw64.exe
  3. CD to working folder cd "C:\User\Reddit\src\HWI"
  4. Enter venv source .venv/Scripts/activate 1
  5. Run UI build bash contrib/generate-ui.sh

( B ) Create a Trezor wallet in Bitcoin Core (testnet)

You only need to set the wallet up once, no private key data is stored, only xpub data

( B.I ) Retrieve keypool from HWI-QT

  1. Launch hwi-qt.exe --testnet (assuming testnet)
  2. Click Set passphrase (if needed) to cache your passphrase then click Refresh
  3. Select you trezor from the list then click Set Pin (if needed)
  4. Ensure your Trezor in the dropdown has a fingerprint
  5. Select Change keypool options and choose P2WPKH
  6. Copy all the text from the Keypool textbox

( B.II ) Create the wallet in Bitcoin QT

  1. Launch Bitcoin Core (testnet) (non-pruned) 2
  2. Select Console from the Window menu
  3. Create a wallet createwallet "hwi" true
  4. Ensure that hwi is selected in the console wallet dropdown
  5. Verify walletname using the getwalletinfo command
  6. Import keypool importmulti '' (note ' caging)
  7. Rescan if TXNs are missing rescanblockchain 3

( C.I ) Grab Tesnet coins

  1. Select the Receive tab in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Select Create new receiving address and copy address
  4. Google "bitcoin testnet faucet" and visit a few sites
  5. Answer captcha and input your addressed copied from C.I.3

( D ) Spending funds with HWI

This is how you can spend funds in your Trezor using Bitcoin Core (testnet)

( D.I ) Create an unsigned PSBT

  1. Select the Send tab in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Verify your balance in Watch-only balance
  4. Rescan if balance is wrong (see B.II.7) 3
  5. Craft your TXN as usual, then click Create Unsigned
  6. Copy the PSBT to your clipboard when prompted

( D.II ) Sign your PSBT

  1. In HWI-QT click Sign PSBT
  2. Paste what you copied in D.I.6 in PSBT to Sign field
  3. Click Sign PSBT
  4. Copy the text for PSBT Result

( D.III ) Broadcast your TXN

  1. Select the Console window in Bitcoin Core (testnet)
  2. Ensure that the Wallet dropdown has hwi selected
  3. Finalize PSBT: finalizepsbt
  4. Copy the signed TXN hex from the hex field returned
  5. Broadcast TXN: sendrawtransaction

Final Thoughts

I did this all through the GUI interfaces for the benefit of the Windows users. Windows console is fine, but the quote escaping in windows console is nightmarish. Powershell would be good, but that throws this on a whole another level for most Windows folks.
There is also the need to use HWI-QT due to a bug in blank passphrases on the commandline. You can work around it by toggling passphrase off or on, but again, it's more than I wanted to spell out.
Footnotes:
  • 1. - Later version of python put the activate script under 'bin' instead of 'Script'
  • 2. - You can run pruned, but you need to have a fresh wallet
  • 3. - Rescan is automatic on 'importmulti' but I was pruned so it was wierd
submitted by brianddk to TREZOR [link] [comments]

Mega eTextbooks release thread (part-28)! Find your textbooks here between $5-$25 :)

Please find the list below:
  1. Disease Gene Identification: Methods and Protocols, 2nd Edition: Johanna K. DiStefano
  2. Statistical Aspects of the Microbiological Examination of Foods, 3rd Edition: Basil Jarvis
  3. Revel for Social Problems, 14th Edition: Stanley Eitzen & Maxine Baca Zinn & Kelly Ei Smith
  4. Fundamentals of Human Resource Management: Pearson New International Edition, 3rd Edition: Gary Dessler
  5. Economics Today: The Micro View, 18th Edition: Roger LeRoy Miller
  6. Employment Law for Business, 8th Edition: Dawn Bennett-Alexander & Laura Hartman
  7. Surgical Exposures in Orthopaedics: The Anatomic Approach, 5th Edition: Stanley Hoppenfeld & Piet de Boer & Richard Buckley
  8. Project Management in Construction, 7th Edition: Sidney Levy
  9. Financial and Managerial Accounting, 7th Edition: John Wild & Ken Shaw & Barbara Chiappetta
  10. Handbook of Plant Disease Identification and Management, 1st Edition: Balaji Aglave
  11. Ubuntu Unleashed 2019 Edition: Covering 18.04, 18.10, 19.04, 13th Edition: Matthew Helmke
  12. Handbook of Insulin Therapies, 1st Edition: Winston Crasto & Janet Jarvis & Melanie J. Davies
  13. Python for Programmers: with Big Data and Artificial Intelligence Case Studies, 1st Edition: Paul J. Deitel & Harvey Deitel
  14. Medical Ethics: Accounts of Ground-Breaking Cases, 7th Edition: Gregory Pence
  15. Human Resource Management, 13th Edition: Gary Dessler
  16. The Biology and Therapeutic Application of Mesenchymal Cells, 2 Volume Set, 1st Edition: Kerry Atkinson
  17. Computer Security Fundamentals, 3rd Edition: William Chuck Easttom
  18. Hendee's Radiation Therapy Physics, 4th Edition: Todd Pawlicki & Daniel J. Scanderbeg & George Starkschall
  19. Nutrient Delivery, 1st Edition: Alexandru Grumezescu
  20. Technology Entrepreneurship: Taking Innovation to the Marketplace, 2nd Edition: Thomas N. Duening & Robert A. Hisrich & Michael A. Lechter
  21. Chemistry of Metalloproteins: Problems and Solutions in Bioinorganic Chemistry, 1st Edition: Joseph J. Stephanos & Anthony W. Addison
  22. Mathematical Statistics with Applications in R, 2nd Edition: Kandethody M. Ramachandran & Chris P. Tsokos
  23. Diagnostic Imaging: Genitourinary, 3rd Edition: Mitchell E. Tublin
  24. Comprehensive Management of Arteriovenous Malformations of the Brain and Spine, 1st Edition: Robert F. Spetzler & Douglas S. Kondziolka & Randall T. Higashida & M. Yashar S. Kalani
  25. Digital Design: With an Introduction to the Verilog HDL, 5th Edition: M. Morris R. Mano & Michael D. Ciletti
  26. Plasmids: Biology and Impact in Biotechnology and Discovery, 1st Edition: Marcelo E. Tolmasky & Juan C. Alonso
  27. Consumer Behavior: Buying, Having, and Being, Global Edition, 12th Edition: Michael R. Solomon
  28. Project Management Case Studies, 5th Edition: Harold Kerzner
  29. Medical Phisiology: Principles for Clinical Medicine, 4th Edition: Rodney A. Rhoades & David R. Bell
  30. Essentials of Contemporary Management, 7th Edition: Gareth Jones & Jennifer George
  31. Harmony and Voice Leading, 4th Edition: Thomas E. Benjamin & Michael Horvit & Robert S. Nelson
  32. Principles of Economics, 2nd Edition: Lee Coppock & Dirk Mateer
  33. Oral Microbiology and Immunology, 2nd Edition: Richard J. Lamont & George N. Hajishengallis & Howard F. Jenkinson
  34. Magnetic Resonance Imaging of the Brain and Spine, 5th Edition: Scott W. Atlas
  35. Accounting Information Systems: Controls and Processes, 3rd Edition: Leslie Turner & Andrea B. Weickgenannt & Mary Kay Copeland
  36. Strategic Corporate Social Responsibility: Sustainable Value Creation, 5th Edition: David Chandler
  37. Julien's Primer of Drug Action: A Comprehensive Guide to the Actions, Uses, and Side Effects of Psychoactive Drugs, 14th Edition: Claire D. Advokat & Joseph Comaty & Robert Julien
  38. The Grand Chessboard: American Primacy And Its Geostrategic Imperatives, 1st Edition: Zbigniew Brzezinski
  39. The Cosmic Perspective: The Solar System, 8th Edition: Jeffrey O. Bennett & Megan O. Donahue & Nicholas Schneider & Mark Voit
  40. Ultrastructure Atlas of Human Tissues, 1st Edition: Fred Hossler
  41. Advances in the Biology and Management of Modern Bed Bugs, 1st Edition: Stephen L. Doggett & Dini M. Miller & Chow-Yang Lee
  42. Patterns of World History: Volume One: To 1600, 1st Edition: Peter von Sivers & Charles A. Desnoyers & George B. Stow
  43. Genitourinary Imaging: A Core Review, 1st Edition: Matthew Davenport
  44. Evidence-based Obstetrics and Gynecology, 1st Edition: Errol R. Norwitz & Carolyn M. Zelop & David A. Miller & David L. Keefe
  45. Zoology, 10th Edition: Stephen Miller & John Harley
  46. Radical and Reconstructive Gynecologic Cancer Surgery, 1st Edition: Robert Bristow & Dennis Chi
  47. Davis's Diseases & Disorders A Nursing Therapeutics Manual, 6th Edition: Marilyn Sawyer Sommers
  48. Management & Cost Accounting, 6th Edition: Alnoor Bhimani
  49. Elements of Modern Algebra, 8th Edition: Linda Gilbert
  50. Psychiatric & Mental Health Nursing, 4th Edition: Katie Evans & Debra Nizette & Anthony O'Brien
  51. Molecular Biology: Different Facets, 1st Edition: Anjali Priyadarshini & Prerna Pandey
  52. Elementary Number Theory, 7th Edition: David Burton
  53. Accounting Information Systems, 14th Edition: Marshall B. Romney & Paul J. Steinbart
  54. Microeconomics, Global Edition, 9th Edition: Robert Pindyck & Daniel Rubinfeld
  55. Psychiatric and Mental Health Nursing Demystified, 1st Edition: Jim Keogh
  56. Entrepreneurship, 10th Edition: Robert Hisrich & Michael Peters & Dean Shepherd
  57. Ganong's Review of Medical Physiology, 26th Edition: Kim E. Barrett & Susan M. Barman & Jason Yuan & Heddwen L. Brooks
  58. Textbook of Obstetrics and Gynaecology: A life course approach, 1st Edition: Eric A.P. Steegers & Bart C.J.M. Fauser & Carina G.J.M. Hilders
  59. Engineering Mechanics: Statics, 8th Edition: James L. Meriam & L. G. Kraige & J. N. Bolton
  60. Basic Concepts of Psychiatric-Mental Health Nursing, 8th Edition: Louise Rebraca Shives
  61. Beckmann and Ling's Obstetrics and Gynecology, 8th Edition: Robert Casanova
  62. Biology: Concepts and Applications, 10th Edition: Cecie Starr & Christine Evers & Lisa Starr
  63. Estimating in Building Construction, 9th Edition: Steven J. Peterson & Frank R. Dagostino
  64. The Big Back Book: Tips & Tricks for Therapists, 1st Edition: Jane Johnson
  65. University Physics with Modern Physics, 14th Edition: Hugh D. Young & Roger A. Freedman
  66. Poisoning and Drug Overdose, 7th Edition: Kent Olson & Ilene Anderson & Neal Benowitz & Paul Blanc
  67. Koneman's Color Atlas and Textbook of Diagnostic Microbiology, 7th Edition: Gary W. Procop
  68. Experimental Psychology, 7th Edition: Anne Myers & Christine H. Hansen
  69. Marketing: An Introduction, 13th Edition: Gary Armstrong & Philip Kotler
  70. Gray's Anatomy for Students: With Student Consult, 3rd Edition: Richard Drake & A. Wayne Vogl & Adam W. M. Mitchell
  71. Chestnut's Obstetric Anesthesia: Principles and Practice, 5th Edition: David H. Chestnut & Cynthia A Wong & Lawrence C Tsen & Warwick D Ngan Kee & Yaakov Beilin & Jill Mhyre
  72. Chemistry: The Molecular Science, 5th Edition: John W. Moore & Conrad L. Stanitski
  73. Head, Neck and Dental Emergencies, 2nd Edition: Mike Perry
  74. Wong's Nursing Care of Infants and Children, 10th Edition: Marilyn J. Hockenberry & David Wilson
  75. Sports Emergency Care: A Team Approach, 3rd Edition: Robb Rehberg & Jeff G. Konin
  76. New Venture Creation: Entrepreneurship for the 21st Century, 10th Edition: Stephen Spinelli & Rob Adams
  77. Caring for the Vulnerable: Perspectives in Nursing Theory, Practice, and Research, 5th Edition: Mary de Chesnay & Barbara Anderson
  78. Geometry: The Line and the Circle: Maureen T. Carroll & Elyn Rykken
  79. Histories of Human Engineering: Tact and Technology: Maarten Derksen
  80. Land Restoration: Reclaiming Landscapes for a Sustainable Future, 1st Edition: Ilan Chabay & Martin Frick & Jennifer Helgeson
  81. Yamada's Handbook of Gastroenterology, 3rd Edition: Tadataka Yamada & John M. Inadomi & Renuka Bhattacharya & Jason A. Dominitz & Joo Ha Hwang
  82. Theoretical Physics 9: Fundamentals of Many-body Physics, 2nd Edition: Wolfgang Nolting & William D. Brewer
  83. Introduction to Programming with C++, 3rd Edition: Y. Daniel Liang
  84. Dental Emergencies, 1st Edition: Mark Greenwood & Ian Corbett
  85. Fundamentals of Physics and Chemistry of the Atmosphere, 2nd Edition: Guido Visconti
  86. Calculus: Early Transcendentals, 3rd Edition: William L. Briggs & Lyle Cochran & Bernard Gillett & Eric Schulz
  87. Educating Physical Therapists, 1st Edition: Gail Jensen
  88. Strategic Developments in Eurasia After 11 September, 1st Edition: Shireen Hunter
  89. Contemporary Issues in Healthcare Law and Ethics, 4th Edition: Dean Harris
  90. Transitioning from RN to MSN: Principles of Professional Role Development: Brenda Scott & Mindy Thompson
  91. Principles and Practice of Public Health Surveillance, 3rd Edition: Lisa M. Lee & Steven M. Teutsch & Stephen B. Thacker & Michael E. St. Louis
  92. Elementary Statistics: Picturing the World, 6th Edition: Ron Larson & Betsy Farber
  93. Human Sexuality in a World of Diversity, 6th Canadian Edition: Spencer A. Rathus & Jeffrey S. Nevid & Lois Fichner-Rathus & Alex McKay & Robin Milhausen
  94. Becoming Your Own Banker, 6th Edition: R. Nelson Nash
  95. Murach's MySQL, 3rd Edition: Joel Murach
  96. Intermediate Algebra, 13th Edition: Marvin L. Bittinger & Judith A. Beecher & Barbara L. Johnson
  97. Planning Health Promotion Programs: An Intervention Mapping Approach, 4th Edition: L. Kay Bartholomew Eldredge & Christine M. Markham & Robert A. C. Ruiter & Maria E. Fernández & Gerjo Kok & Guy S. Parcel
  98. Human Factors in Simple and Complex Systems, 3rd Edition: Robert W. Proctor & Trisha Van Zandt
  99. The Irony of Democracy: An Uncommon Introduction to American Politics, 17th Edition: Louis Schubert & Thomas R. Dye & Harmon Zeigler
  100. Understanding Earth, 7th Edition: John Grotzinger
  101. Nursing Research in Canada: Methods, Critical Appraisal, and Utilization, 4th Edition: Geri LoBiondo-Wood & Judith Haber & Cherylyn Cameron & Mina Singh
  102. The Philosophy of Film, 1st Edition: Thomas E. Wartenberg & Angela Curran
  103. Disaster Nursing and Emergency Preparedness, 4th Edition: Tener Goodwin Veenema
  104. Language in Mind: An Introduction to Psycholinguistics, 2nd Edition: Julie Sedivy
  105. Medical Anthropology: A Biocultural Approach, 3rd Edition: Andrea S. Wiley & John S. Allen
  106. Exploring Biology in the Laboratory, 3rd Edition: Murray P. Pendarvis & John L. Crawley
  107. Guide to Networking Essentials, 8th Edition: Greg Tomsho
  108. Social Psychology: A Storytelling Approach, 2nd Edition: Leonard Newman & Ralph Erber
  109. Managing Conflict: An Introspective Journey to Negotiating Skills, 1st Edition: Dorothy Balancio
  110. Environmental Change and Challenge: A Canadian Perspective, 5th Edition: Philip Dearden & Bruce Mitchell
  111. Brain and Behavior: A Cognitive Neuroscience Perspective, 1st Edition: David Eagleman & Jonathan Downar
  112. Cardiac/Vascular Nurse Exam Secrets Study Guide: Cardiac/Vascular Nurse Test Review for the Cardiac/Vascular Nurse Exam: Mometrix Media & Cardiac Vascular Nurse Exam Secrets
  113. Keeping the Republic: Power and Citizenship in American Politics, The Essentials, 9th Edition: Christine Barbour & Gerald Wright
  114. Principles of Environmental Science, 9th Edition: William Cunningham & Mary Cunningham
  115. Thomas' Calculus, 14th Edition: Joel R. Hass & Christopher E. Heil & Maurice D. Weir
  116. Pharmacology for Canadian Pharmacy Technicians, 1st Edition: Leland Norman Holland & Michael P. Adams & Jeanine Lynn Brice & Heather V. LeBlanc
  117. Cellular and Molecular Immunology, 9th Edition: Abul K. Abbas & Andrew H. Lichtman & Shiv Pillai
  118. Operations Management: Processes and Supply Chains, 11th Edition: Lee J. Krajewski & Manoj K. Malhotra & Larry P. Ritzman
  119. Jews, Christians, Muslims: A Comparative Introduction to Monotheistic Religions, 2nd Edition: John Corrigan & Frederick Denny & Martin S Jaffee & Carlos Eire
  120. Professional Nursing: Concepts & Challenges, 9th Edition: Beth Black
  121. Practical Homicide Investigation: Tactics, Procedures, and Forensic Techniques, 4th Edition: Vernon J. Geberth
  122. Fundamentals of Modern Manufacturing: Materials, Processes and Systems, 7th Edition: Mikell P. Groover
  123. Genetics: A Conceptual Approach, 7th Edition: Benjamin A. Pierce
  124. Computer Science Illuminated, 7th Edition: Nell Dale & John Lewis
  125. The Globalization of World Politics: An Introduction to International Relations, 8th Edition: John Baylis & Steve Smith & Patricia Owens
  126. Behavioral Neuroscience, 9th Edition: S. Marc Breedlove & Neil V. Watson
  127. Canadian Human Resource Management: A Strategic Approach, 12th Edition: Hermann Schwind & Krista Uggerslev & Terry Wagar & Neil Fassina
  128. Brief Principles of Macroeconomics, 9th Edition: N. Gregory Mankiw
  129. Living in the Environment, 4th Canadian Edition: G. Miller & Dave Hackett & Carl Wolfe
  130. Principles of Economics, 9th Edition: N. Gregory Mankiw
  131. Principles of Microeconomics, 9th Edition: N. Gregory Mankiw
  132. Child Development, 9th Edition: Laura E. Berk
  133. Home, School, and Community Collaboration: Culturally Responsive Family Engagement, 4th Edition: Kathy Beth Grant & Julie A. Ray
  134. Set Lighting Technician's Handbook, 4th Edition: Harry Box
  135. Clinical Nurse Leader Certification Review, 2nd Edition: Cynthia R. King
  136. Basic Chemistry, 4th Edition: Karen C. Timberlake & William Timberlake
  137. Sparks & Taylor's Nursing Diagnosis Pocket Guide, 3rd Edition: Linda Phelps
  138. Family Theories: Foundations and Applications, 1st Edition: Katherine R. Allen & Angela C. Henderson
  139. The Earth and Its Peoples: A Global History, 7th Edition: Richard Bulliet & Pamela Crossley & Daniel Headrick & Steven Hirsch & Lyman Johnson
  140. Sociology in Action: A Canadian Perspective, 3rd Edition: Tami Bereska & Diane Symbaluk
  141. Operations Management: Processes and Supply Chains, 12th Edition: Lee J. Krajewski & Manoj K. Malhotra & Larry P. Ritzman
  142. Introduction to Food Science and Food Systems, 2nd Edition: Rick Parker & Miriah Pace
  143. Liaisons, Student Edition: An Introduction to French, 3rd Edition: Wynne Wong & Stacey Weber-Fève & Bill VanPatten
  144. Zuckerman Parker Handbook of Developmental and Behavioral Pediatrics for Primary Care, 4th Edition: Marilyn Augustyn & Barry Zuckerman
  145. Teaching in Today's Inclusive Classrooms: A Universal Design for Learning Approach, 3rd Edition: Richard M. Gargiulo & Debbie Metcalf
  146. The Biological Basis of Mental Health, 3rd Edition: William T. Blows
  147. Developing and Managing Electronic Collections: The Essentials: Peggy Johnson
  148. Western Civilization: Volume II: Since 1500, 10th Edition: Jackson J. Spielvogel
  149. Talking to Strangers: What We Should Know about the People We Don't Know, 1st Edition: Malcolm Gladwell
  150. Understanding Pathophysiology, 7th Edition: Sue E. Huether & Kathryn L. McCance
  151. Our Environment: A Canadian Perspective, 5th edition: Dianne Draper & Ann Zimmerman
  152. Criminal Law: Cases and Materials, 8th Edition: John Kaplan & Robert Weisberg & Guyora Binder
  153. A Photographic Atlas of Histology, 2nd Edition: Michael J Leboffe
  154. Dragons and Tigers: A Geography of South, East, and Southeast Asia, 3rd Edition: Barbara A. Weightman
  155. Climate Change Biology, 1st Edition: Jonathan A. Newman & Madhur Anand & Hugh A. L. Henry & Shelley L. Hunt & Ze'ev Gedalof
  156. The Power of Critical Thinking: 5th Canadian Edition: Chris MacDonald and Lewis Vaughn
  157. Principles of Fire Behavior and Combustion, 4th Edition: Richard Gann & Raymond Friedman
  158. Informatics Nurse Exam Secrets Study Guide: Informatics Test Review for the Informatics Nurse Certification Exam: Informatics Exam Secrets Test Prep Team
  159. General Chemistry, 10th Edition: Darrell Ebbing & Steven D. Gammon
  160. A Practical Guide to Computer Forensics Investigations, 1st Edition: Darren R. Hayes
  161. Basic Biomechanics, 8th Edition: Susan Hall
  162. Essay Writing for Canadian Students, 8th Edition: Roger Davis & Laura K. Davis
  163. Biology, 11th Edition: Peter Raven & George Johnson & Kenneth Mason & Jonathan Losos & Susan Singer
  164. Molecular Imaging, 1st Edition: Ralph Weissleder& Brian D. Ross & Alnawaz Rehemtulla & Sanjiv Sam Gambhir
  165. Criminology, 4th Edition: Frank Schmalleger
  166. A Theory of Truthmaking: Metaphysics, Ontology, and Reality: Jamin Asay
  167. The Routledge Handbook of Metaphysical Grounding, 1st Edition: Michael J. Raven
  168. Linear Algebra and Its Applications, 5th Edition: David C. Lay & Steven R. Lay & Judi J. McDonald
  169. Essentials of Human Communication, 9th Edition: Joseph A. DeVito
  170. Economics: Principles, Applications, and Tools, 9th Edition, Global Edition: Arthur O'Sullivan & Steven Sheffrin & Stephen Perez
  171. Global Health 101, 3rd Edition: Richard Skolnik
  172. Mathematical Proofs: A Transition to Advanced Mathematics, 4th Edition: Gary Chartrand & Albert D. Polimeni & Ping Zhang
  173. Concepts in Strategic Management and Business Policy: Globalization, Innovation and Sustainability, 15th Edition, Global Edition: Thomas L. Wheelen & J. David Hunger & Alan N. Hoffman & Charles E. Bamford
  174. Chemistry: The Central Science, 14th Edition, Global Edition: Theodore E. Brown & H. Eugene LeMay & Bruce E. Bursten & Catherine Murphy & Patrick Woodward & Matthew E. Stoltzfus
  175. Biopsychology, 10th Edition, Global Edition: John P. J. Pinel & Steven Barnes
  176. Electric Circuits, 11th Edition: James W. Nilsson & Susan Riedel
  177. Keeping the Republic; Power and Citizenship in American Politics, the Essentials, 8th Edition: Christine Barbour & Gerald C Wright
  178. Applied Behavior Analysis: Pearson New International Edition, 2nd Edition: John O. Cooper & Timothy E. Heron & William L. Heward
  179. Cryptography and Network Security: Principles and Practice, 7th Edition, Global Edition: William Stallings
  180. Operating Systems: Internals and Design Principles, 9th Edition, Global Edition: William Stallings
  181. Options, Futures, and Other Derivatives, 9th Edition, Global Edition: John C. Hull
  182. Invitation to the Psychology of Religion, 3rd Edition: Raymond F. Paloutzian
  183. Valuation: The Art and Science of Corporate Investment Decisions, 3rd Edition: Sheridan Titman
  184. Comprehensive Clinical Nephrology, 5th Edition: Richard J. Johnson & John Feehally & Jurgen Floege
  185. Miller & Freund's Probability and Statistics for Engineers, 9th Edition, Global Edition: Richard Johnson & Irwin Miller & John Freund
  186. Exploring Strategy: Text and Cases, 11th Edition: Gerry Johnson & Richard Whittington & Patrick Regnér & Kevan Scholes & Duncan Angwin
  187. Economics for Business, 7th Edition: John Sloman
  188. Essentials of Economics, 7th Edition: John Sloman & Dean Garratt
  189. Economics, 9th Edition: John Sloman & Dean Garratt & Alison Wride
  190. Essential Economics for Business, 5th Edition: Johnsloman & Jones Elizabeth
  191. Finite Mathematics, 7th Edition: Stefan Waner & Steven Costenoble
  192. The SAGE Encyclopedia of Surveillance, Security, and Privacy, 1st Edition: Bruce A. Arrigo
  193. Evolution, 4th Edition: Douglas J. Futuyma & Mark Kirkpatrick
  194. Adult Development and Aging, 7th Edition: John C. Cavanaugh & Fredda Blanchard-Fields
  195. Foundations of Finance, 9th Edition, Global Edition: Arthur J. Keown & John D Martin & J. William Petty
  196. Learning PHP, MySQL & JavaScript: With jQuery, CSS & HTML5, 4th Edition: Robin Nixon
  197. Head First Learn to Code: A Learner's Guide to Coding and Computational Thinking, 1st Edition: Eric Freeman
  198. Learning Swift: Building Apps for macOS, iOS, and Beyond, 3rd Edition: Jonathon Manning & Paris Buttfield-Addison & Tim Nugent
  199. Database Systems: Design, Implementation, & Management, 12th Edition: Carlos Coronel & Steven Morris
  200. Introduction to Solid Modeling Using SolidWorks, 13th Edition: William Howard & Joseph Musto
  201. Communications Receivers: Principles and Design, 4th Edition: Ulrich Rohde & Jerry Whitaker & Hans Zahnd
  202. Connect Core Concepts in Health, 15th Edition: Paul Insel & Walton Roth
  203. On Course: Strategies for Creating Success in College and in Life, 8th Edition: Skip Downing
  204. Vander's Human Physiology, 15th Edition: Eric Widmaier & Hershel Raff & Kevin Strang
  205. Biology, 4th Edition: Robert Brooker & Eric Widmaier & Linda Graham & Peter Stiling
  206. The Essentials of Statistics: A Tool for Social Research, 4th Edition: Joseph F. Healey
  207. Oracle 12c: SQL, 3rd Edition: Joan Casteel
  208. Global Business Today, 10th Edition: Charles Hill & G. Tomas M. Hult
  209. Project Management: The Managerial Process, 7th Edition: Erik Larson & Clifford Gray
  210. Organizational Behavior: A Practical, Problem-Solving Approach, 2nd Edition: Angelo Kinicki & Mel Fugate
  211. International Management: Culture, Strategy, and Behavior, 10th Edition: Fred Luthans & Jonathan Doh
  212. CorelDRAW X8: The Official Guide, 12th Edition: Gary David Bouton
  213. Physics for Scientists and Engineers: An Interactive Approach, 2nd Edition: Robert Hawkes & Javed Iqbal & Firas Mansour & Marina Milner-Bolotin & Peter Williams
  214. Programmable Logic Controllers, 5th Edition: Frank Petruzella
  215. Foundations in Microbiology, 10th Edition: Kathleen Park Talaro & Barry Chess
  216. Applied Numerical Methods with MATLAB for Engineers and Scientists, 4th Edition: Steven Chapra
  217. Tonal Harmony, 8th Edition: Stefan Kostka & Dorothy Payne & Byron Almén
  218. Discrete Mathematics, 8th Edition: Richard Johnsonbaugh
  219. Bates' Pocket Guide to Physical Examination and History Taking, 8th Edition: Lynn S. Bickley
  220. NANDA International Nursing Diagnoses: Definitions & Classification 2018-2020, 11th Edition: T. Heather Herdman & Shigemi Kamitsuru & Heather T. Herdman
  221. Biology: Concepts and Investigations, 4th Edition: Mariëlle Hoefnagels
  222. Biology: Concepts and Investigations, 3rd Edition: Mariëlle Hoefnagels
  223. Human Biology: Concepts and Current Issues, 8th Edition, Global Edition: Michael D. Johnson
  224. Messages: Building Interpersonal Communication Skills, 5th Canadian Edition: Joseph A. DeVito & Rena Shimoni & Dawne Clark
  225. The Interpersonal Communication Book, 14th Edition, Global Edition: Joseph A. DeVito
  226. Computational Systems Pharmacology and Toxicology, 1st Edition: Rudy J Richardson & Dale E Johnson & Noffisat Oki & David Faulkner
  227. Shelly Cashman Series Microsoft Office 365 & Office 2019 Introductory, 1st Edition: Sandra Cable & Steven M. Freund & Ellen Monk & Susan L. Sebok & Joy L. Starks
  228. The Practice of Emotionally Focused Couple Therapy: Creating Connection, 2nd Edition: Susan M. Johnson
  229. The Marriage Clinic: A Scientifically Based Marital Therapy, 1st Edition: John M. Gottman
  230. Cognitive-Behavioral Therapy with Couples and Families: A Comprehensive Guide for Clinicians, 1st Edition: Frank M. Dattilio & Aaron T. Beck
  231. International Marketing, 17th Edition: Philip R. Cateora & John Graham & Mary C Gilly
  232. Kaplan and Sadock's Concise Textbook of Clinical Psychiatry, 3rd Edition: Benjamin Sadock & Virginia Alcott Sadock
  233. Anthropology, 14th Edition: Carol R. Ember & Melvin Ember & Peter N. Peregrine
  234. The Men They Will Become: The Nature And Nurture Of Male Character: Eli Newberger
  235. Accounting, 27th Edition: Carl S. Warren & James M. Reeve & Jonathan Duchac
  236. ICD-10-CM 2019: The Complete Official Codebook, 1st Edition: American Medical Association
  237. Essentials of Human Anatomy & Physiology, 12th Edition, Global Edition: Elaine N. Marieb & Suzanne M. Keller
  238. Early Childhood Education Today, 14th Edition: George S Morrison
  239. Programming Bitcoin: Learn How to Program Bitcoin from Scratch, 1st Edition: Jimmy Song
  240. The Physiology and Biochemistry of Prokaryotes, 4th Edition: David White & James Drummond & Clay Fuqua
  241. Environmental Microbiology, 3rd Edition: Ian L. Pepper & Charles P. Gerba & Terry J. Gentry
  242. Industrial Microbiology: An Introduction, 1st Edition: Michael J. Waites & Neil L. Morgan & John S. Rockey & Gary Higton
  243. Introduction to Econometrics, Updated 3rd Edition, Global Edition: James H. Stock & Mark W. Watson
  244. Introduction to Econometrics, 3rd Edition: James H. Stock & Mark W. Watson
  245. Expert Oracle Application Express, 2nd Edition: Doug Gault & Dimitri Gielis & Martin DSouza & Roel Hartman
  246. The Art of Reasoning: An Introduction to Logic and Critical Thinking, 4th Edition: David Kelley
  247. Physics, 5th Edition: James S. Walker
  248. Applied Fluid Mechanics, 7th Edition: Robert L. Mott & Joseph A. Untener
  249. Applied Strength of Materials, SI Units Version, 6th Edition: Robert L. Mott & Joseph A. Untener
  250. Social Psychology, 12th Edition: David Myers & Jean Twenge
  251. Applied Strength of Materials, 6th Edition: Robert Mott & Joseph A. Untener
  252. Foundations of Nursing Research, 7th Edition: Rose Marie Nieswiadomy & Catherine Bailey
  253. Molecular Cell Biology, 8th Edition: Harvey Lodish & Arnold Berk & Chris A. Kaiser & Monty Krieger & Anthony Bretscher
  254. Machine Elements in Mechanical Design, 6th Edition: Robert L. Mott & Edward M. Vavrek & Jyhwen Wang
  255. DeVita, Hellman, and Rosenberg's Cancer, 11th Edition: Vincent T. DeVita & Steven A. Rosenberg & Theodore S. Lawrence
  256. Particle Image Velocimetry: A Practical Guide, 3rd Edition: Markus Raffel & Christian E. Willert & Fulvio Scarano & Christian J. Kähler
  257. Smith's Textbook of Endourology, 4th Edition: Arthur D. Smith & Glenn Preminger & Gopal H. Badlani & Louis R. Kavoussi
  258. College Algebra with Modeling & Visualization, 6th Edition: Gary K. Rockswold
  259. Financial Accounting Theory, 7th Edition: William R. Scott
  260. Biology Now, 2nd Edition: Anne Houtman & Megan Scudellari & Cindy Malone
  261. Psychological Science, 5th Edition: Michael Gazzaniga & Diane Halpern
  262. The Handbook of Technical Writing, 11th Edition: Gerald J. Alred & Charles T. Brusaw & Walter E. Oliu
  263. A Graphical Approach to College Algebra, 6th Edition: John Hornsby & Margaret L. Lial & Gary K. Rockswold
  264. Business Analytics, 4th Edition: Jeffrey D. Camm & James J. Cochran & Michael J. Fry & Jeffrey W. Ohlmann
  265. Biological Psychology, 13th Edition: James W. Kalat
  266. Business Communication Today, 14th Edition: Courtland L. Bovee & John V. Thill
  267. Geosystems Core, 1st Edition: Robert W. Christopherson & Stephen Cunha & Charles E. Thomsen & Ginger Birkeland
  268. Principles of Information Security, 6th Edition: Michael E. Whitman & Herbert J. Mattord
  269. Financial & Managerial Accounting, 14th Edition: Carl S. Warren & James M. Reeve & Jonathan Duchac
  270. Corporate Finance: Theory and Practice, 5th Edition: Pierre Vernimmen & Pascal Quiry & Maurizio Dallocchio & Yann Le Fur & Antonio Salvi
  271. Introductory Statistics, 10th Edition: Neil A. Weiss
  272. Introduction to Cryptography: Principles and Applications, 3rd Edition: Hans Delfs & Helmut Knebl
  273. Business Essentials, 8th Canadian Edition: Ronald J. Ebert & Ricky W. Griffin & Frederick A. Starke & George Dracopoulos
  274. Introduction to Mathematical Statistics, 8th Edition: Robert V. Hogg & Joseph W. McKean & Allen T. Craig
  275. The Routledge Companion to Business Ethics, 1st Edition: Eugene Heath & Byron Kaldis & Alexei Marcoux
  276. Geosystems An Introduction to Physical Geography, Global Edition, 9th Edition: Ginger H. Birkel & Robert W. Christopherson
  277. Scientific American Environmental Science for a Changing World, 2nd Edition: Jeneen InterlandI & Anne Houtman
  278. Precalculus, 10th Edition: Ron Larson
  279. The Human Brain Book: An Illustrated Guide to its Structure, Function, and Disorders, New Edition: Rita Carter
  280. Introduction to Materials Science for Engineers, 8th Edition: James F. Shackelford
  281. Adobe Dreamweaver CC Classroom in a Book, 1st Edition: Jim Maivald
  282. Trigonometry, 11th Edition: Margaret L. Lial & John Hornsby & David I. Schneider & Callie Daniels
  283. Investment Banks, Hedge Funds, and Private Equity, 3rd Edition: David P. Stowell
  284. Cognitive Neuroscience: The Biology of the Mind, 5th Edition: Michael Gazzaniga & Richard B. Ivry & George R. Mangun
  285. Cognitive Neuroscience: The Biology of the Mind, 5th Edition: Michael Gazzaniga & Richard B. Ivry (Author), George R. Mangun (Author)
  286. Project Management Theory and Practice, 3rd Edition: Gary L. Richardson & Brad M. Jackson
  287. Organic Chemistry: Structure and Function, 8th Edition: K. Peter C. Vollhardt & Neil E. Schore
  288. Read, Reason, Write: An Argument Text and Read, 11th Edition: Dorothy Seyler
  289. Fundamentals of Management: Management Myths Debunked!, Global Edition, 10th Edition: Stephen P Robbins & David A. De Cenzo & Mary Coulter
  290. Computer Networking: A Top-Down Approach, Global Edition, 7th Edition: James Kurose & Keith Ross
  291. An Introduction to Banking: Principles, Strategy and Risk Management, 2nd Edition: Moorad Choudhry
  292. The Immune System, 4th Edition: Peter Parham
  293. Biochemistry: Concepts and Connections, Global Edition, 1st Edition: Dean R. Appling & Spencer J. Anthony-Cahill & Christopher K. Mathews
  294. Writing about Writing, 3rd Edition: Elizabeth Wardle & Douglas Downs
  295. Data Wrangling with JavaScript, 1st Edition: Ashley Davis
  296. Experience Psychology, 4th Edition: Laura King
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  298. Business Communication: Polishing Your Professional Presence, 3rd Edition: Barbara G. Shwom & Lisa Gueldenzoph Snyder
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  306. Analytical Mechanics, 2nd Edition: Nivaldo A. Lemos
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  318. Thinking Mathematically, 7th Edition: Robert F. Blitzer
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  322. Asking the Right Questions, 11th Edition, Global Edition: M. Neil Browne & Stuart M. Keeley
  323. Crash Course Cardiology, 4th Edition: Antonia Churchhouse & Julian O. M. Ormerod & Michael Frenneaux
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  325. Unlocking Equity and Trusts, 5th Edition: Mohamed Ramjohn
  326. Public Speaking: The Evolving Art, 4th Edition: Stephanie J. Coopman & James Lull
  327. Social Psychology, 8th Edition: Michael Hogg & Graham Vaughan
  328. Human Resources Management in Canada, 12th Canadian Edition: Gary Dessler & Nita Chhinzer & Nina Cole
  329. Law Core Textbook Bundle: Equity and Trusts, 8th edition: Alastair Hudson
  330. Living Ethics: An Introduction with Readings: Russ Shafer-Landau
  331. Microsoft Project 2019 Step by Step, 1st Edition: Cindy Lewis & Carl Chatfield & Timothy Johnson
  332. Global Business Ethics: Responsible Decision Making in an International Context, 1st Edition: Ronald D Francis & Guy Murfey
  333. Construction Management: Theory and Practice, 1st Edition: Chris March
  334. Harrison's Endocrinology, 4th Edition: J. Larry Jameson
  335. Harrison's Neurology in Clinical Medicine, 4th Edition: Stephen Hauser & S. Andrew Josephson
  336. English Grammar Workbook For Dummies with Online Practice, 3rd Edition: Geraldine Woods
  337. Naked: The Dark Side of Shame and Moral Life, 1st Edition: Krista K. Thomason
  338. Ashcraft's Pediatric Surgery, 6th Edition: George W. Holcomb III & J. Patrick Murphy & Daniel J Ostlie
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  340. Lange Clinical Neurology, 10th Edition: Roger Simon & David Greenberg & Michael Aminoff
  341. International Textbook of Diabetes Mellitus, 2 Volume Set, 4th Edition: R. A. DeFronzo & E. Ferrannini & Paul Zimmet & George Alberti
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  349. Financial Management: Principles and Applications, Global Edition, 13th Edition: Sheridan Titman & Arthur J. Keown & John D Martin
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  352. MRI: Basic Principles and Applications, 5th Edition: Brian M. Dale & Mark A. Brown & Richard C. Semelka
  353. Robbins Basic Pathology, 10th Edition: Vinay Kumar & Abul K. Abbas & Jon C. Aster & Vinay Kumar & Abul K. Abbas & Jon C. Aster
  354. Rosen's Emergency Medicine: Concepts and Clinical Practice: 2-Volume Set, 9th Edition: Ron Walls & Robert Hockberger & Marianne Gausche-Hill
  355. BNF for Children: 2018-2019, 1st Edition: Paediatric Formulary Committee
  356. Sitaraman and Friedman's Essentials of Gastroenterology, 2nd Edition: Shanthi Srinivasan & Lawrence S. Friedman
  357. Practical Gastroenterology and Hepatology Board Review Toolkit, 2nd Edition: Kenneth R. DeVault & Michael B. Wallace & Bashar A. Aqel & Keith D. Lindor
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Constructing a Bitcoin transaction using python - 3/5 Bitcoin Price Prediction Using Machine Learning And Python Python Bitcoin Tutorial for Beginners - YouTube Python Requests Tutorial - Bitcoin Price API Bitcoin Protocol: Proof of Work shown in Python Code

Follow the Bitcoin With Python, BlockExplorer and Webhose.io ... Lines 144-148: we send off the new query (144) and then parse the JSON response (148) before returning to the top of the loop on line 118 to continue processing newly discovered hidden services. Oof! That’s a lot of code. At this point in our script we can get all Bitcoin transactions, all unique Bitcoin addresses related to ... To show that the above Python script generates working Bitcoin addresses, I’ll go ahead and send 0.2 BTC – that’s currently over $100 worth – to the first address shown in the above screenshot. I’ll use Bitcoin-Qt, the original Bitcoin desktop wallet. Here’s the transaction verified on Blockchain.info. Goodbye, 0.2 BTC! It uses the example of trading Tron against Bitcoin on the Binance exchange platform. I choose these coins because of their volatility against each other, rather than any personal preference. The bot will make decisions based on exponential moving averages (EMAs). 1_ema-25.png. TRX/BTC 1-hour candle chart. The EMA indicator is, in general, a weighted moving average that gives more weight to ... Bitcoin Price Notifications With Python# As we all know, Bitcoin price is a fickle thing. You never really know where it’s going to be at the end of the day. So, instead of constantly checking various sites for the latest updates, let’s make a Python app to do the work for you. For this, we’re going to use the popular automation website IFTTT. IFTTT (“if this, then that”) is a web ... As an exercise to learn Python/git, I wrote a Python function to monitor the price of BTC using bitcoinaverage's API. If the price has changed more drastically than a user defined ratio since the last notification, it will send an smtp message through your email's smtp server to your desired destination address. As a non-smartphone user living in the 90's, I use this script to send text ...

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Constructing a Bitcoin transaction using python - 3/5

http://bit.ly/bitcoincourse (full course) This will demo creating a Bitcoin address and transaction using JavaScript and the Bitcore.io library. Full source ... Bitcoin Protocol Paper Playlist: http://www.youtube.com/watch?v=UieiMU-ImvI&list=PLQVvvaa0QuDcq2QME4pfeh0cE71mkb_qz&feature=share All Bitcoin Videos Playlist... In this video I talk about the basics of using Python requests by showing you how to call the Coinbase Bitcoin Price Index API. You can see the API docs here... Bitcoin Price Prediction Using Machine Learning And Python Please Subscribe ! ⭐Please Subscribe !⭐ ⭐Support the channel and/or get the code by becoming a sup... 🎓 In this stream I'm going to go through building a simple little python script that polls the Luno API for the current Bitcoin prices on their exchange. If the price changes we will print a ...

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