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Community curation of the latest cryptocurrency news.
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DigiByte : Más Seguro, Más Veloce, Visión del Futuro

DigiByte (DGB) es un sistema de pago mundial descentralizado en expansion explosiva, e inspirado por Bitcoin. ¡DigiByte le permite de enviar dinero por internet de manera similar a PayPal & Western Union pero con varias ventajas incluyendo, transacciones instantáneas, con tarifas mínimas o hasta sin tarifas! Puede enviar o recibir DigiBytes desde cualquier dirección DigiByte en el mundo entero en algunos segundos sin necesidad de registrar una cuenta, i sin cobro escondido.
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Cryptocurrency news and discussions.

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Technical: The Path to Taproot Activation

Taproot! Everybody wants to have it, somebody wants to make it, nobody knows how to get it!
(If you are asking why everybody wants it, see: Technical: Taproot: Why Activate?)
(Pedants: I mostly elide over lockin times)
Briefly, Taproot is that neat new thing that gets us:
So yes, let's activate taproot!

The SegWit Wars

The biggest problem with activating Taproot is PTSD from the previous softfork, SegWit. Pieter Wuille, one of the authors of the current Taproot proposal, has consistently held the position that he will not discuss activation, and will accept whatever activation process is imposed on Taproot. Other developers have expressed similar opinions.
So what happened with SegWit activation that was so traumatic? SegWit used the BIP9 activation method. Let's dive into BIP9!

BIP9 Miner-Activated Soft Fork

Basically, BIP9 has a bunch of parameters:
Now there are other parameters (name, starttime) but they are not anywhere near as important as the above two.
A number that is not a parameter, is 95%. Basically, activation of a BIP9 softfork is considered as actually succeeding if at least 95% of blocks in the last 2 weeks had the specified bit in the nVersion set. If less than 95% had this bit set before the timeout, then the upgrade fails and never goes into the network. This is not a parameter: it is a constant defined by BIP9, and developers using BIP9 activation cannot change this.
So, first some simple questions and their answers:

The Great Battles of the SegWit Wars

SegWit not only fixed transaction malleability, it also created a practical softforkable blocksize increase that also rebalanced weights so that the cost of spending a UTXO is about the same as the cost of creating UTXOs (and spending UTXOs is "better" since it limits the size of the UTXO set that every fullnode has to maintain).
So SegWit was written, the activation was decided to be BIP9, and then.... miner signalling stalled at below 75%.
Thus were the Great SegWit Wars started.

BIP9 Feature Hostage

If you are a miner with at least 5% global hashpower, you can hold a BIP9-activated softfork hostage.
You might even secretly want the softfork to actually push through. But you might want to extract concession from the users and the developers. Like removing the halvening. Or raising or even removing the block size caps (which helps larger miners more than smaller miners, making it easier to become a bigger fish that eats all the smaller fishes). Or whatever.
With BIP9, you can hold the softfork hostage. You just hold out and refuse to signal. You tell everyone you will signal, if and only if certain concessions are given to you.
This ability by miners to hold a feature hostage was enabled because of the miner-exit allowed by the timeout on BIP9. Prior to that, miners were considered little more than expendable security guards, paid for the risk they take to secure the network, but not special in the grand scheme of Bitcoin.

Covert ASICBoost

ASICBoost was a novel way of optimizing SHA256 mining, by taking advantage of the structure of the 80-byte header that is hashed in order to perform proof-of-work. The details of ASICBoost are out-of-scope here but you can read about it elsewhere
Here is a short summary of the two types of ASICBoost, relevant to the activation discussion.
Now, "overt" means "obvious", while "covert" means hidden. Overt ASICBoost is obvious because nVersion bits that are not currently in use for BIP9 activations are usually 0 by default, so setting those bits to 1 makes it obvious that you are doing something weird (namely, Overt ASICBoost). Covert ASICBoost is non-obvious because the order of transactions in a block are up to the miner anyway, so the miner rearranging the transactions in order to get lower power consumption is not going to be detected.
Unfortunately, while Overt ASICBoost was compatible with SegWit, Covert ASICBoost was not. This is because, pre-SegWit, only the block header Merkle tree committed to the transaction ordering. However, with SegWit, another Merkle tree exists, which commits to transaction ordering as well. Covert ASICBoost would require more computation to manipulate two Merkle trees, obviating the power benefits of Covert ASICBoost anyway.
Now, miners want to use ASICBoost (indeed, about 60->70% of current miners probably use the Overt ASICBoost nowadays; if you have a Bitcoin fullnode running you will see the logs with lots of "60 of last 100 blocks had unexpected versions" which is exactly what you would see with the nVersion manipulation that Overt ASICBoost does). But remember: ASICBoost was, at around the time, a novel improvement. Not all miners had ASICBoost hardware. Those who did, did not want it known that they had ASICBoost hardware, and wanted to do Covert ASICBoost!
But Covert ASICBoost is incompatible with SegWit, because SegWit actually has two Merkle trees of transaction data, and Covert ASICBoost works by fudging around with transaction ordering in a block, and recomputing two Merkle Trees is more expensive than recomputing just one (and loses the ASICBoost advantage).
Of course, those miners that wanted Covert ASICBoost did not want to openly admit that they had ASICBoost hardware, they wanted to keep their advantage secret because miners are strongly competitive in a very tight market. And doing ASICBoost Covertly was just the ticket, but they could not work post-SegWit.
Fortunately, due to the BIP9 activation process, they could hold SegWit hostage while covertly taking advantage of Covert ASICBoost!

UASF: BIP148 and BIP8

When the incompatibility between Covert ASICBoost and SegWit was realized, still, activation of SegWit stalled, and miners were still not openly claiming that ASICBoost was related to non-activation of SegWit.
Eventually, a new proposal was created: BIP148. With this rule, 3 months before the end of the SegWit timeout, nodes would reject blocks that did not signal SegWit. Thus, 3 months before SegWit timeout, BIP148 would force activation of SegWit.
This proposal was not accepted by Bitcoin Core, due to the shortening of the timeout (it effectively times out 3 months before the initial SegWit timeout). Instead, a fork of Bitcoin Core was created which added the patch to comply with BIP148. This was claimed as a User Activated Soft Fork, UASF, since users could freely download the alternate fork rather than sticking with the developers of Bitcoin Core.
Now, BIP148 effectively is just a BIP9 activation, except at its (earlier) timeout, the new rules would be activated anyway (instead of the BIP9-mandated behavior that the upgrade is cancelled at the end of the timeout).
BIP148 was actually inspired by the BIP8 proposal (the link here is a historical version; BIP8 has been updated recently, precisely in preparation for Taproot activation). BIP8 is basically BIP9, but at the end of timeout, the softfork is activated anyway rather than cancelled.
This removed the ability of miners to hold the softfork hostage. At best, they can delay the activation, but not stop it entirely by holding out as in BIP9.
Of course, this implies risk that not all miners have upgraded before activation, leading to possible losses for SPV users, as well as again re-pressuring miners to signal activation, possibly without the miners actually upgrading their software to properly impose the new softfork rules.

BIP91, SegWit2X, and The Aftermath

BIP148 inspired countermeasures, possibly from the Covert ASiCBoost miners, possibly from concerned users who wanted to offer concessions to miners. To this day, the common name for BIP148 - UASF - remains an emotionally-charged rallying cry for parts of the Bitcoin community.
One of these was SegWit2X. This was brokered in a deal between some Bitcoin personalities at a conference in New York, and thus part of the so-called "New York Agreement" or NYA, another emotionally-charged acronym.
The text of the NYA was basically:
  1. Set up a new activation threshold at 80% signalled at bit 4 (vs bit 1 for SegWit).
    • When this 80% signalling was reached, miners would require that bit 1 for SegWit be signalled to achive the 95% activation needed for SegWit.
  2. If the bit 4 signalling reached 80%, increase the block weight limit from the SegWit 4000000 to the SegWit2X 8000000, 6 months after bit 1 activation.
The first item above was coded in BIP91.
Unfortunately, if you read the BIP91, independently of NYA, you might come to the conclusion that BIP91 was only about lowering the threshold to 80%. In particular, BIP91 never mentions anything about the second point above, it never mentions that bit 4 80% threshold would also signal for a later hardfork increase in weight limit.
Because of this, even though there are claims that NYA (SegWit2X) reached 80% dominance, a close reading of BIP91 shows that the 80% dominance was only for SegWit activation, without necessarily a later 2x capacity hardfork (SegWit2X).
This ambiguity of bit 4 (NYA says it includes a 2x capacity hardfork, BIP91 says it does not) has continued to be a thorn in blocksize debates later. Economically speaking, Bitcoin futures between SegWit and SegWit2X showed strong economic dominance in favor of SegWit (SegWit2X futures were traded at a fraction in value of SegWit futures: I personally made a tidy but small amount of money betting against SegWit2X in the futures market), so suggesting that NYA achieved 80% dominance even in mining is laughable, but the NYA text that ties bit 4 to SegWit2X still exists.
Historically, BIP91 triggered which caused SegWit to activate before the BIP148 shorter timeout. BIP148 proponents continue to hold this day that it was the BIP148 shorter timeout and no-compromises-activate-on-August-1 that made miners flock to BIP91 as a face-saving tactic that actually removed the second clause of NYA. NYA supporters keep pointing to the bit 4 text in the NYA and the historical activation of BIP91 as a failed promise by Bitcoin developers.

Taproot Activation Proposals

There are two primary proposals I can see for Taproot activation:
  1. BIP8.
  2. Modern Softfork Activation.
We have discussed BIP8: roughly, it has bit and timeout, if 95% of miners signal bit it activates, at the end of timeout it activates. (EDIT: BIP8 has had recent updates: at the end of timeout it can now activate or fail. For the most part, in the below text "BIP8", means BIP8-and-activate-at-timeout, and "BIP9" means BIP8-and-fail-at-timeout)
So let's take a look at Modern Softfork Activation!

Modern Softfork Activation

This is a more complex activation method, composed of BIP9 and BIP8 as supcomponents.
  1. First have a 12-month BIP9 (fail at timeout).
  2. If the above fails to activate, have a 6-month discussion period during which users and developers and miners discuss whether to continue to step 3.
  3. Have a 24-month BIP8 (activate at timeout).
The total above is 42 months, if you are counting: 3.5 years worst-case activation.
The logic here is that if there are no problems, BIP9 will work just fine anyway. And if there are problems, the 6-month period should weed it out. Finally, miners cannot hold the feature hostage since the 24-month BIP8 period will exist anyway.

PSA: Being Resilient to Upgrades

Software is very birttle.
Anyone who has been using software for a long time has experienced something like this:
  1. You hear a new version of your favorite software has a nice new feature.
  2. Excited, you install the new version.
  3. You find that the new version has subtle incompatibilities with your current workflow.
  4. You are sad and downgrade to the older version.
  5. You find out that the new version has changed your files in incompatible ways that the old version cannot work with anymore.
  6. You tearfully reinstall the newer version and figure out how to get your lost productivity now that you have to adapt to a new workflow
If you are a technically-competent user, you might codify your workflow into a bunch of programs. And then you upgrade one of the external pieces of software you are using, and find that it has a subtle incompatibility with your current workflow which is based on a bunch of simple programs you wrote yourself. And if those simple programs are used as the basis of some important production system, you hve just screwed up because you upgraded software on an important production system.
And well, one of the issues with new softfork activation is that if not enough people (users and miners) upgrade to the newest Bitcoin software, the security of the new softfork rules are at risk.
Upgrading software of any kind is always a risk, and the more software you build on top of the software-being-upgraded, the greater you risk your tower of software collapsing while you change its foundations.
So if you have some complex Bitcoin-manipulating system with Bitcoin somewhere at the foundations, consider running two Bitcoin nodes:
  1. One is a "stable-version" Bitcoin node. Once it has synced, set it up to connect=x.x.x.x to the second node below (so that your ISP bandwidth is only spent on the second node). Use this node to run all your software: it's a stable version that you don't change for long periods of time. Enable txiindex, disable pruning, whatever your software needs.
  2. The other is an "always-up-to-date" Bitcoin Node. Keep its stoarge down with pruning (initially sync it off the "stable-version" node). You can't use blocksonly if your "stable-version" node needs to send transactions, but otherwise this "always-up-to-date" Bitcoin node can be kept as a low-resource node, so you can run both nodes in the same machine.
When a new Bitcoin version comes up, you just upgrade the "always-up-to-date" Bitcoin node. This protects you if a future softfork activates, you will only receive valid Bitcoin blocks and transactions. Since this node has nothing running on top of it, it is just a special peer of the "stable-version" node, any software incompatibilities with your system software do not exist.
Your "stable-version" Bitcoin node remains the same version until you are ready to actually upgrade this node and are prepared to rewrite most of the software you have running on top of it due to version compatibility problems.
When upgrading the "always-up-to-date", you can bring it down safely and then start it later. Your "stable-version" wil keep running, disconnected from the network, but otherwise still available for whatever queries. You do need some system to stop the "always-up-to-date" node if for any reason the "stable-version" goes down (otherwisee if the "always-up-to-date" advances its pruning window past what your "stable-version" has, the "stable-version" cannot sync afterwards), but if you are technically competent enough that you need to do this, you are technically competent enough to write such a trivial monitor program (EDIT: gmax notes you can adjust the pruning window by RPC commands to help with this as well).
This recommendation is from gmaxwell on IRC, by the way.
submitted by almkglor to Bitcoin [link] [comments]

Collection of fee estimating tools (for saving on fees when sending a bitcoin transaction)

Here are some resources that can help you estimate fees when sending a bitcoin transaction, so you don't end up overpaying unnecessarily. Keep in mind that in order to take advantage of this, you need a proper bitcoin wallet which allows for custom fee setting. A selection of such wallets you can find here or here.
The order here is roughly from advanced to easy.
1) https://jochen-hoenicke.de/queue/#0,24h
Here you can see a visualization of how many unconfirmed transactions are currently on the network, as well as how many were there in the past. Each coloured layer represents a different fee amount. F.ex the deep blue (lowest layer) are the 1sat/byte transactions, slightly brighter level above are the 2sat/byte transactions and so on.
The most interesting graph is the third one, which shows you the size of the current mempool in MB and the amount of transactions with different fee levels, which would compete with your transaction if you were to send it right now. This should help you estimating how high you need to set the fee (in sat/byte) in order to have it confirmed "soon". But this also should help you to see that even the 1sat/byte transactions get confirmed very regularly, especially on weekends and in the night periods, and that the spikes in the mempool are always temporary. For that you can switch to higher timeframes in the upper right corner, f.ex here is a 30 days view: https://jochen-hoenicke.de/queue/#0,30d. You clearly can see that the mempool is cyclical and you can set a very low fee if you are not in hurry.
2) https://mempool.space
This is also an overview of the current mempool status, although less visual than the previous one. It shows you some important stats, like the mempool size, some basic stats of the recent blocks (tx fees, size etc). Most importantly, it makes a projection of how large you need to set your fees in sat/byte if you want your transaction to be included in the next block, or within the next two/three/four blocks. You can see this projection in the left upper corner (the blocks coloured in brown).
3) https://whatthefee.io
This is a simple estimate tool. It shows you the likelihood (in %) of a particular fee size (in sat/byte) to be confirmed within a particular timeframe (measured in hours). It is very simple to use, but the disadvantage is that it shows you estimates only for the next 24 hours. You probably will still overpay by this method, if your transaction is less time sensitive than that.
4) https://twitter.com/CoreFeeHelper
This is a very simple bot that tweets out fees projections every hour or so. It tells you how you need to set the fees in order to be confirmed within 1hou6hours/12hours/1day/3days/1week. Very simple to use.
Hopefully one of these tools will help you save fees for your next bitcoin transaction. Or at least help you understand that even with a very low fee setting your transaction will be confirmed sooner or later. Furthermore, I hope it makes you understand how important it is to use a wallet that allows you to set your own fees.
submitted by TheGreatMuffin to Bitcoin [link] [comments]

Syscoin Platform’s Great Reddit Scaling Bake-off Proposal

Syscoin Platform’s Great Reddit Scaling Bake-off Proposal

https://preview.redd.it/rqt2dldyg8e51.jpg?width=1044&format=pjpg&auto=webp&s=777ae9d4fbbb54c3540682b72700fc4ba3de0a44
We are excited to participate and present Syscoin Platform's ideal characteristics and capabilities towards a well-rounded Reddit Community Points solution!
Our scaling solution for Reddit Community Points involves 2-way peg interoperability with Ethereum. This will provide a scalable token layer built specifically for speed and high volumes of simple value transfers at a very low cost, while providing sovereign ownership and onchain finality.
Token transfers scale by taking advantage of a globally sorting mempool that provides for probabilistically secure assumptions of “as good as settled”. The opportunity here for token receivers is to have an app-layer interactivity on the speed/security tradeoff (99.9999% assurance within 10 seconds). We call this Z-DAG, and it achieves high-throughput across a mesh network topology presently composed of about 2,000 geographically dispersed full-nodes. Similar to Bitcoin, however, these nodes are incentivized to run full-nodes for the benefit of network security, through a bonded validator scheme. These nodes do not participate in the consensus of transactions or block validation any differently than other nodes and therefore do not degrade the security model of Bitcoin’s validate first then trust, across every node. Each token transfer settles on-chain. The protocol follows Bitcoin core policies so it has adequate code coverage and protocol hardening to be qualified as production quality software. It shares a significant portion of Bitcoin’s own hashpower through merged-mining.
This platform as a whole can serve token microtransactions, larger settlements, and store-of-value in an ideal fashion, providing probabilistic scalability whilst remaining decentralized according to Bitcoin design. It is accessible to ERC-20 via a permissionless and trust-minimized bridge that works in both directions. The bridge and token platform are currently available on the Syscoin mainnet. This has been gaining recent attention for use by loyalty point programs and stablecoins such as Binance USD.

Solutions

Syscoin Foundation identified a few paths for Reddit to leverage this infrastructure, each with trade-offs. The first provides the most cost-savings and scaling benefits at some sacrifice of token autonomy. The second offers more preservation of autonomy with a more narrow scope of cost savings than the first option, but savings even so. The third introduces more complexity than the previous two yet provides the most overall benefits. We consider the third as most viable as it enables Reddit to benefit even while retaining existing smart contract functionality. We will focus on the third option, and include the first two for good measure.
  1. Distribution, burns and user-to-user transfers of Reddit Points are entirely carried out on the Syscoin network. This full-on approach to utilizing the Syscoin network provides the most scalability and transaction cost benefits of these scenarios. The tradeoff here is distribution and subscription handling likely migrating away from smart contracts into the application layer.
  2. The Reddit Community Points ecosystem can continue to use existing smart contracts as they are used today on the Ethereum mainchain. Users migrate a portion of their tokens to Syscoin, the scaling network, to gain much lower fees, scalability, and a proven base layer, without sacrificing sovereign ownership. They would use Syscoin for user-to-user transfers. Tips redeemable in ten seconds or less, a high-throughput relay network, and onchain settlement at a block target of 60 seconds.
  3. Integration between Matic Network and Syscoin Platform - similar to Syscoin’s current integration with Ethereum - will provide Reddit Community Points with EVM scalability (including the Memberships ERC777 operator) on the Matic side, and performant simple value transfers, robust decentralized security, and sovereign store-of-value on the Syscoin side. It’s “the best of both worlds”. The trade-off is more complex interoperability.

Syscoin + Matic Integration

Matic and Blockchain Foundry Inc, the public company formed by the founders of Syscoin, recently entered a partnership for joint research and business development initiatives. This is ideal for all parties as Matic Network and Syscoin Platform provide complementary utility. Syscoin offers characteristics for sovereign ownership and security based on Bitcoin’s time-tested model, and shares a significant portion of Bitcoin’s own hashpower. Syscoin’s focus is on secure and scalable simple value transfers, trust-minimized interoperability, and opt-in regulatory compliance for tokenized assets rather than scalability for smart contract execution. On the other hand, Matic Network can provide scalable EVM for smart contract execution. Reddit Community Points can benefit from both.
Syscoin + Matic integration is actively being explored by both teams, as it is helpful to Reddit, Ethereum, and the industry as a whole.

Proving Performance & Cost Savings

Our POC focuses on 100,000 on-chain settlements of token transfers on the Syscoin Core blockchain. Transfers and burns perform equally with Syscoin. For POCs related to smart contracts (subscriptions, etc), refer to the Matic Network proposal.
On-chain settlement of 100k transactions was accomplished within roughly twelve minutes, well-exceeding Reddit’s expectation of five days. This was performed using six full-nodes operating on compute-optimized AWS c4.2xlarge instances which were geographically distributed (Virginia, London, Sao Paulo Brazil, Oregon, Singapore, Germany). A higher quantity of settlements could be reached within the same time-frame with more broadcasting nodes involved, or using hosts with more resources for faster execution of the process.
Addresses used: 100,014
The demonstration was executed using this tool. The results can be seen in the following blocks:
612722: https://sys1.bcfn.ca/block/6d47796d043bb4c508d29123e6ae81b051f5e0aaef849f253c8f3a6942a022ce
612723: https://sys1.bcfn.ca/block/8e2077f743461b90f80b4bef502f564933a8e04de97972901f3d65cfadcf1faf
612724: https://sys1.bcfn.ca/block/205436d25b1b499fce44c29567c5c807beaca915b83cc9f3c35b0d76dbb11f6e
612725: https://sys1.bcfn.ca/block/776d1b1a0f90f655a6bbdf559ff5072459cbdc5682d7615ff4b78c00babdc237
612726: https://sys1.bcfn.ca/block/de4df0994253742a1ac8ac9eec8d2a8c8b0a6d72c53d6f3caa29bb6c171b0a6b
612727: https://sys1.bcfn.ca/block/e5e167c52a9decb313fbaadf49a5e34cb490f8084f642a850385476d4ef10d70
612728: https://sys1.bcfn.ca/block/ab64d989edc71890e7b5b8491c20e9a27520dc45a5f7c776d3dae79057f59fe7
612729: https://sys1.bcfn.ca/block/5e8b7ecd0e36f99d07e4ea6e135fc952bf7ec30164ab6f4d1e98b0f2d405df6d
612730: https://sys1.bcfn.ca/block/d395df3d31dde60bbb0bece6bd5b358297da878f0beb96be389e5f0e043580a3
It is important to note that this POC is not focused on Z-DAG. The performance of Z-DAG has been benchmarked within realistic network conditions: Whiteblock’s audit is publicly available. Network latency tests showed an average TPS around 15k with burst capacity up to 61k. Zero-latency control group exhibited ~150k TPS. Mainnet testing of the Z-DAG network is achievable and will require further coordination and additional resources.
Even further optimizations are expected in the upcoming Syscoin Core release which will implement a UTXO model for our token layer bringing further efficiency as well as open the door to additional scaling technology currently under research by our team and academic partners. At present our token layer is account-based, similar to Ethereum. Opt-in compliance structures will also be introduced soon which will offer some positive performance characteristics as well. It makes the most sense to implement these optimizations before performing another benchmark for Z-DAG, especially on the mainnet considering the resources required to stress-test this network.

Cost Savings

Total cost for these 100k transactions: $0.63 USD
See the live fee comparison for savings estimation between transactions on Ethereum and Syscoin. Below is a snapshot at time of writing:
ETH price: $318.55 ETH gas price: 55.00 Gwei ($0.37)
Syscoin price: $0.11
Snapshot of live fee comparison chart
Z-DAG provides a more efficient fee-market. A typical Z-DAG transaction costs 0.0000582 SYS. Tokens can be safely redeemed/re-spent within seconds or allowed to settle on-chain beforehand. The costs should remain about this low for microtransactions.
Syscoin will achieve further reduction of fees and even greater scalability with offchain payment channels for assets, with Z-DAG as a resilience fallback. New payment channel technology is one of the topics under research by the Syscoin development team with our academic partners at TU Delft. In line with the calculation in the Lightning Networks white paper, payment channels using assets with Syscoin Core will bring theoretical capacity for each person on Earth (7.8 billion) to have five on-chain transactions per year, per person, without requiring anyone to enter a fee market (aka “wait for a block”). This exceeds the minimum LN expectation of two transactions per person, per year; one to exist on-chain and one to settle aggregated value.

Tools, Infrastructure & Documentation

Syscoin Bridge

Mainnet Demonstration of Syscoin Bridge with the Basic Attention Token ERC-20
A two-way blockchain interoperability system that uses Simple Payment Verification to enable:
  • Any Standard ERC-20 token to be moved from Ethereum to the Syscoin blockchain as a Syscoin Platform Token (SPT), and back to Ethereum
  • Any SPT to be moved from Syscoin to the Ethereum blockchain as an ERC-20 token, and back to Syscoin

Benefits

  • Permissionless
  • No counterparties involved
  • No trading mechanisms involved
  • No third-party liquidity providers required
  • Cross-chain Fractional Supply - 2-way peg - Token supply maintained globally
  • ERC-20s gain vastly improved transactionality with the Syscoin Token Platform, along with the security of bitcoin-core-compliant PoW.
  • SPTs gain access to all the tooling, applications and capabilities of Ethereum for ERC-20, including smart contracts.
https://preview.redd.it/l8t2m8ldh8e51.png?width=1180&format=png&auto=webp&s=b0a955a0181746dc79aff718bd0bf607d3c3aa23
https://preview.redd.it/26htnxzfh8e51.png?width=1180&format=png&auto=webp&s=d0383d3c2ee836c9f60b57eca35542e9545f741d

Source code

https://github.com/syscoin/?q=sysethereum
Main Subprojects

API

Tools to simplify using Syscoin Bridge as a service with dapps and wallets will be released some time after implementation of Syscoin Core 4.2. These will be based upon the same processes which are automated in the current live Sysethereum Dapp that is functioning with the Syscoin mainnet.

Documentation

Syscoin Bridge & How it Works (description and process flow)
Superblock Validation Battles
HOWTO: Provision the Bridge for your ERC-20
HOWTO: Setup an Agent
Developer & User Diligence

Trade-off

The Syscoin Ethereum Bridge is secured by Agent nodes participating in a decentralized and incentivized model that involves roles of Superblock challengers and submitters. This model is open to participation. The benefits here are trust-minimization, permissionless-ness, and potentially less legal/regulatory red-tape than interop mechanisms that involve liquidity providers and/or trading mechanisms.
The trade-off is that due to the decentralized nature there are cross-chain settlement times of one hour to cross from Ethereum to Syscoin, and three hours to cross from Syscoin to Ethereum. We are exploring ways to reduce this time while maintaining decentralization via zkp. Even so, an “instant bridge” experience could be provided by means of a third-party liquidity mechanism. That option exists but is not required for bridge functionality today. Typically bridges are used with batch value, not with high frequencies of smaller values, and generally it is advantageous to keep some value on both chains for maximum availability of utility. Even so, the cross-chain settlement time is good to mention here.

Cost

Ethereum -> Syscoin: Matic or Ethereum transaction fee for bridge contract interaction, negligible Syscoin transaction fee for minting tokens
Syscoin -> Ethereum: Negligible Syscoin transaction fee for burning tokens, 0.01% transaction fee paid to Bridge Agent in the form of the ERC-20, Matic or Ethereum transaction fee for contract interaction.

Z-DAG

Zero-Confirmation Directed Acyclic Graph is an instant settlement protocol that is used as a complementary system to proof-of-work (PoW) in the confirmation of Syscoin service transactions. In essence, a Z-DAG is simply a directed acyclic graph (DAG) where validating nodes verify the sequential ordering of transactions that are received in their memory pools. Z-DAG is used by the validating nodes across the network to ensure that there is absolute consensus on the ordering of transactions and no balances are overflowed (no double-spends).

Benefits

  • Unique fee-market that is more efficient for microtransaction redemption and settlement
  • Uses decentralized means to enable tokens with value transfer scalability that is comparable or exceeds that of credit card networks
  • Provides high throughput and secure fulfillment even if blocks are full
  • Probabilistic and interactive
  • 99.9999% security assurance within 10 seconds
  • Can serve payment channels as a resilience fallback that is faster and lower-cost than falling-back directly to a blockchain
  • Each Z-DAG transaction also settles onchain through Syscoin Core at 60-second block target using SHA-256 Proof of Work consensus
https://preview.redd.it/pgbx84jih8e51.png?width=1614&format=png&auto=webp&s=5f631d42a33dc698365eb8dd184b6d442def6640

Source code

https://github.com/syscoin/syscoin

API

Syscoin-js provides tooling for all Syscoin Core RPCs including interactivity with Z-DAG.

Documentation

Z-DAG White Paper
Useful read: An in-depth Z-DAG discussion between Syscoin Core developer Jag Sidhu and Brave Software Research Engineer Gonçalo Pestana

Trade-off

Z-DAG enables the ideal speed/security tradeoff to be determined per use-case in the application layer. It minimizes the sacrifice required to accept and redeem fast transfers/payments while providing more-than-ample security for microtransactions. This is supported on the premise that a Reddit user receiving points does need security yet generally doesn’t want nor need to wait for the same level of security as a nation-state settling an international trade debt. In any case, each Z-DAG transaction settles onchain at a block target of 60 seconds.

Syscoin Specs

Syscoin 3.0 White Paper
(4.0 white paper is pending. For improved scalability and less blockchain bloat, some features of v3 no longer exist in current v4: Specifically Marketplace Offers, Aliases, Escrow, Certificates, Pruning, Encrypted Messaging)
  • 16MB block bandwidth per minute assuming segwit witness carrying transactions, and transactions ~200 bytes on average
  • SHA256 merge mined with Bitcoin
  • UTXO asset layer, with base Syscoin layer sharing identical security policies as Bitcoin Core
  • Z-DAG on asset layer, bridge to Ethereum on asset layer
  • On-chain scaling with prospect of enabling enterprise grade reliable trustless payment processing with on/offchain hybrid solution
  • Focus only on Simple Value Transfers. MVP of blockchain consensus footprint is balances and ownership of them. Everything else can reduce data availability in exchange for scale (Ethereum 2.0 model). We leave that to other designs, we focus on transfers.
  • Future integrations of MAST/Taproot to get more complex value transfers without trading off trustlessness or decentralization.
  • Zero-knowledge Proofs are a cryptographic new frontier. We are dabbling here to generalize the concept of bridging and also verify the state of a chain efficiently. We also apply it in our Digital Identity projects at Blockchain Foundry (a publicly traded company which develops Syscoin softwares for clients). We are also looking to integrate privacy preserving payment channels for off-chain payments through zkSNARK hub & spoke design which does not suffer from the HTLC attack vectors evident on LN. Much of the issues plaguing Lightning Network can be resolved using a zkSNARK design whilst also providing the ability to do a multi-asset payment channel system. Currently we found a showstopper attack (American Call Option) on LN if we were to use multiple-assets. This would not exist in a system such as this.

Wallets

Web3 and mobile wallets are under active development by Blockchain Foundry Inc as WebAssembly applications and expected for release not long after mainnet deployment of Syscoin Core 4.2. Both of these will be multi-coin wallets that support Syscoin, SPTs, Ethereum, and ERC-20 tokens. The Web3 wallet will provide functionality similar to Metamask.
Syscoin Platform and tokens are already integrated with Blockbook. Custom hardware wallet support currently exists via ElectrumSys. First-class HW wallet integration through apps such as Ledger Live will exist after 4.2.
Current supported wallets
Syscoin Spark Desktop
Syscoin-Qt

Explorers

Mainnet: https://sys1.bcfn.ca (Blockbook)
Testnet: https://explorer-testnet.blockchainfoundry.co

Thank you for close consideration of our proposal. We look forward to feedback, and to working with the Reddit community to implement an ideal solution using Syscoin Platform!

submitted by sidhujag to ethereum [link] [comments]

How are Ethereum addresses created?

This says that an Ethereum address is basically a Keccak-256 (SHA-3) with some truncation, basically 20 bytes.
https://cryptoticker.io/en/ethereum-addresses-generation/
Bitcoin by comparison has this nice article: https://en.bitcoin.it/wiki/Technical_background_of_version_1_Bitcoin_addresses
I also found the EIP for checksum addresses, but that of course needs an address to be constructed first: https://eips.ethereum.org/EIPS/eip-55
submitted by Zamicol to ethdev [link] [comments]

HowTo: Create and Spend a Electrum Segwit 3of3 Multisig wallet with Trezors

I wrote a simlar post in Bitcoin about creating a MS wallet without a Trezor, this guide will focus on creating a 3of3 MS wallet with three Trezor's. Hopefully it should be obvious how to extend this to N-of-M for any value of N or M. You can also use this as a blueprint to do MS with non-HW Electrum wallets like Android.
It should be noted that this is the most general case method for setting this up. This allows to replace non-HW Electrum wallets into this procedure where HW-wallets are referenced. For the far simpler method, just pick Cosign with hardware device instead of Cosign with key as I outline here. If you choose Cosign with HW you can do the entire process in one wallet file in one session.
The main advantage of multisig is that it reduces the risk of one compromised seed exposing all your funds. Although this is exceedingly complicated, the added layer of complications make it all the more difficult to compromise your funds. Most of the complexity is on the initial wallet setup. Sending is only a bit more complicated, and Receiving is the same as it would be for any electrum wallet.
We will be creating three wallets here, and each will use a Trezor with its own seed, passphrase, and public key (Zpub). If your just wanting to play with this process you could use one Trezor with three different passphrases. Electrum will treat this like three different wallets, since... well since it is. The Zpubs will be calculated by Electrum.
For all references to wallet passphrases or encryption passwords, I highly recommend you generate six-word passphrases. Three simple ways to construct a six-word passphrase would be to either use EFF diceware long wordlist to roll for 6 words, or create a short six-word BIP39 seed and use that as a passphrase, or create a random Electrum seed and use the last 6 words. You will need to take care that all six-word passphrases are equal or less than 50 characters. Longer passphrases can produce some unexpected results. Whenever you need to create a passphrase or password from here on out, create a six-word string as described above.
Assuming your have your Trezors initialized with passphrases enabled, our first order of business will be ensuring the authenticity of Electrum. For the PC's this must be done with PGP/GPG following the procedure spelled out on the Electrum website, or the secondary docs. It is absolutely critical that you are certain your using the correct ThomasV key. As of the time of this writing, the "correct" ThomasV key was:
ThomasV PGP: 6694 D8DE 7BE8 EE56 31BE D950 2BD5 824B 7F94 70E6
Once your Electrum install is validated, here is excruciating detail on creating and spending from a 3of3 multisig wallet. This assumes you have passphrases enabled on all your Trezors and that each has a unique name. For simplicity I will simply refer to their names at "trez-1", "trez-2", and "trez-3"

Three Wallet Creation passes

Do the following first for "trez-1", then for "trez-2" and finally for "trez-3". The order is VERY important:
  1. Wallet->New, name your wallet
  2. Then insert your Trezor ("trez-1", "trez-2", or "trez-3")
  3. Choose Multisig Wallet, then 3of3
  4. Choose Use a hardware device
  5. Select device
  6. Craft (and record) a new 6 word passphrase
  7. Choose Native Segwit derivation
  8. Record Zpub
  9. Unplug your Trezor ("trez-1", "trez-2", or "trez-3")
  10. Choose Add Cosigner Key
  11. Wait at "Add Cosigner 2" dialog

Distribute Zpubs to Finish Wallet Creation

When completing the setup for each wallet below you will be prompted for a wallet encryption password. I recommend you craft a unique six-word string as described above. If Electrum asks to reconnect to your HW wallet simply say "No". You will notice that the order is the reverse of the previous portion. As before, the order is VERY important,.
  1. Swap over to your trez-3 wallet
  2. Click "Enter Cosigner Key"
  3. Enter trez-1 Zpub
  4. Click "Enter Cosigner Key"
  5. Enter trez-2 Zpub
  6. Swap over to your trez-2 wallet
  7. Click "Enter Cosigner Key"
  8. Enter trez-3 Zpub
  9. Click "Enter Cosigner Key"
  10. Enter trez-1 Zpub
  11. Swap over to your trez-1 wallet
  12. Click "Enter Cosigner Key"
  13. Enter trez-2 Zpub
  14. Click "Enter Cosigner Key"
  15. Enter trez-3 Zpub
You can now close each wallet file.
You should now have recorded:
Keep the 12 secrets secure, separate and safe.

Receive funds into your 3of3 MS wallet

Receive just like any other wallet. All three wallets will watch the same set of addresses

Spend funds from your 3of3 MS wallet

  1. Create a TXN as you normally would on your first device
  2. In the TXN dialog hit "Preview" instead of Send
  3. In the Preview screen hit "Sign", then "Export"
  4. Copy the TXN over to your second device
  5. On your second device click Tools->Load Transaction
  6. Enter your partially signed TXN
  7. Verify the Status reads "Partially signed (1/3)"
  8. In the Preview screen hit "Sign", then "Export"
  9. Copy the TXN over to your third device
  10. On your third device click Tools->Load Transaction
  11. Enter your partially signed TXN
  12. Verify the Status reads "Partially signed (2/3)"
  13. In the Preview screen hit "Sign", then "Broadcast"

Conclusion

Certainly more complicated than a non MS wallet, but a lot more secure. Also be aware that the Segwit MS TXNs are about 40% larger than the native Segwit TXNs, so this does generate some additional cost in TXN fees.
submitted by brianddk to TREZOR [link] [comments]

CropBytes. Game Review

CropBytes. Game Review
Friends, I want to introduce you to one game on the #Tron platform called CropBytes https://cropbytes.com.

https://preview.redd.it/50qw4cs90jf51.png?width=886&format=png&auto=webp&s=746be85ad06684e77e67f6390076c43c1a364e69
Since my hobby is the search for additional (passive) income, cryptocurrency, and also games, when in July I received a letter in the mail (apparently signed) about the release of this game in the 3D version, I decided to see what it is ...

CropBytes is an online Crypto Game based on the real-world farming economy, where you play and own assets inside the game & use them to provide goods & services to other players or trade.

The game was first released back in 2018 in 2D, but I hadn't heard of it then.
There are many massive farming games out there with millions of active players, but CropBytes offers a significant difference - the Play to Earn model.

Players will be able to upgrade their farms, produce goods and trade them in an open economy in order to earn cryptocurrency.

Why can you ask? Because the game exchange is not working yet, but the developers promise that it will work soon.

It is worth noting that the game is available on Android and iOS mobile devices, as well as on PC. The game still maintains the philosophy of free play with a trial package, but you can always deposit some cryptocurrency to promote your farm faster.

So what is included in the trial package: a cow, a chicken, a goat, fruit feed, some corn and carrot seeds and water, and of course the most important thing is a piece of land where you can plant the available seeds.

The chicken brings you eggs, the cow and the goat bring you milk. And the seeds turn into ready-made fruits of corn or carrots, from which you can prepare carrot and corn feed, respectively.

You cannot plant carrots and corn at once. Just one thing.

ATTENTION! a small instruction on how to plant seeds. For a long time I could not figure it out, because there is no manual for the game anywhere. After you set your site in the place you need, click on it, you will have 2 bags with pictures on them - these are your carrot and corn seeds, choose what you plant by clicking on the desired bag.

https://preview.redd.it/jqpyuspd0jf51.jpg?width=1280&format=pjpg&auto=webp&s=2a484d986200b8048e2136d27d6e2d80ee865706
A message appears with the inscription "Done", on which you do not need to click, but you must click on the site.

https://preview.redd.it/3ug477ef0jf51.jpg?width=1280&format=pjpg&auto=webp&s=994429e115a40e2635a5946bbabff123919dacd2
Not knowing this, I clicked on the outgoing message and naturally nothing happened. I thought that maybe there was not enough seeds and bribed a little ... But I was prompted in the telegram group for the game (I will indicate the link to it below) and everything worked out.

https://preview.redd.it/axoutcsg0jf51.jpg?width=1280&format=pjpg&auto=webp&s=7a14a3724f69cd15bf47085662798db0b401732c
So friends who are interested in the game

Download now 👇

👉 iOS ➡️ https://apps.apple.com/us/app/cropbytes-farm/id1441553490?ls=1

👉 Android ➡️ https://play.google.com/store/apps/details?id=com.Hyfll.FarmingGame&hl=en

* you can enter the referral code 7CCFB8, which can give you a bonus and of course my support

Play on web 👉 https://cropbytes.com/farm-view

* Note: Loading the game on your web browser will take 5-10 min on the first attempt. Please be patient.

Telegram Channel: https://t.me/ccropbytes

Telegram Community: https://t.me/cropbytes

Medium: https://medium.com/cropbytes

Twitter: https://twitter.com/cropbytes

Facebook: https://www.facebook.com/cropbytes

Youtube: https://www.youtube.com/c/CropBytes/featured

Blog: https://cropbytes.com/blog

P.S. you can earn some TRX by participating in the bounty at https://cropbytes.com/bounty

And here https://youtu.be/-VI37IrlBhs you can see how I play the game.

✅ BONUS
Referral Bonus, Bounty Programs, Contest & more

✅ SECURITY
Two Factor Authentication.
Highly Secure Wallet

CropBytes - Crypto Farming Game 3.0.16
2020-07-27
● An awesome new 3D game environment
● New UI, Buttons, icons and interactions
● Updated rules for growing, storing, planting
● Highly detailed gameplay
● Extended play area for more fun


Coming soon

- CropBytes Exchange
- Additional tokens like Bitcoin (BTC), Ethereum (ETH) & USDT
- Auto withdrawals- Quick withdrawals to your personal crypto-wallet
submitted by Zotoff85 to u/Zotoff85 [link] [comments]

ECDSA In Bitcoin

Digital signatures are considered the foundation of online sovereignty. The advent of public-key cryptography in 1976 paved the way for the creation of a global communications tool – the Internet, and a completely new form of money – Bitcoin. Although the fundamental properties of public-key cryptography have not changed much since then, dozens of different open-source digital signature schemes are now available to cryptographers.

How ECDSA was incorporated into Bitcoin

When Satoshi Nakamoto, a mystical founder of the first crypto, started working on Bitcoin, one of the key points was to select the signature schemes for an open and public financial system. The requirements were clear. An algorithm should have been widely used, understandable, safe enough, easy, and, what is more important, open-sourced.
Of all the options available at that time, he chose the one that met these criteria: Elliptic Curve Digital Signature Algorithm, or ECDSA.
At that time, native support for ECDSA was provided in OpenSSL, an open set of encryption tools developed by experienced cipher banks in order to increase the confidentiality of online communications. Compared to other popular schemes, ECDSA had such advantages as:
These are extremely useful features for digital money. At the same time, it provides a proportional level of security: for example, a 256-bit ECDSA key has the same level of security as a 3072-bit RSA key (Rivest, Shamir и Adleman) with a significantly smaller key size.

Basic principles of ECDSA

ECDSA is a process that uses elliptic curves and finite fields to “sign” data in such a way that third parties can easily verify the authenticity of the signature, but the signer himself reserves the exclusive opportunity to create signatures. In the case of Bitcoin, the “data” that is signed is a transaction that transfers ownership of bitcoins.
ECDSA has two separate procedures for signing and verifying. Each procedure is an algorithm consisting of several arithmetic operations. The signature algorithm uses the private key, and the verification algorithm uses only the public key.
To use ECDSA, such protocol as Bitcoin must fix a set of parameters for the elliptic curve and its finite field, so that all users of the protocol know and apply these parameters. Otherwise, everyone will solve their own equations, which will not converge with each other, and they will never agree on anything.
For all these parameters, Bitcoin uses very, very large (well, awesomely incredibly huge) numbers. It is important. In fact, all practical applications of ECDSA use huge numbers. After all, the security of this algorithm relies on the fact that these values are too large to pick up a key with a simple brute force. The 384-bit ECDSA key is considered safe enough for the NSA's most secretive government service (USA).

Replacement of ECDSA

Thanks to the hard work done by Peter Wuille (a famous cryptography specialist) and his colleagues on an improved elliptical curve called secp256k1, Bitcoin's ECDSA has become even faster and more efficient. However, ECDSA still has some shortcomings, which can serve as a sufficient basis for its complete replacement. After several years of research and experimentation, a new signature scheme was established to increase the confidentiality and efficiency of Bitcoin transactions: Schnorr's digital signature scheme.
Schnorr's signature takes the process of using “keys” to a new level. It takes only 64 bytes when it gets into the block, which reduces the space occupied by transactions by 4%. Since transactions with the Schnorr signature are the same size, this makes it possible to pre-calculate the total size of the part of the block that contains such signatures. A preliminary calculation of the block size is the key to its safe increase in the future.
Keep up with the news of the crypto world at CoinJoy.io Follow us on Twitter and Medium. Subscribe to our YouTube channel. Join our Telegram channel. For any inquiries mail us at [[email protected]](mailto:[email protected]).
submitted by CoinjoyAssistant to btc [link] [comments]

Calculate txn_id from raw txn_hex

I'm trying to calculate a txn_id from raw txn_hex. The procedure works fine for legacy TXNs but gets non-expected results on Segwit TXNs. I compared this snippet of code to what txn_id was produced by Electrum and the blockchain.com TXN decoder:
  1. Take in TXN in hex
  2. Convert the hex to binarray
  3. Double hash binarray
  4. Reverse the resultant digest because of endianness
  5. Display in hex.
t0 is my legacy testnet TXN and t1 is my segwit testnet TXN.
Thoughts?

UPDATE

Found the relevant source in Electrum transaction.py:1036
Basically you strip the flags and tx_witnesses listed in the wiki spec
```python

!/usbin/env python3

[repo] https://github.com/brianddk/reddit ... python/txn_hash.py

[ref] https://www.reddit.com/g4hvyf

from hashlib import sha256
def txid(tx): bin = bytes.fromhex(tx) txid = sha256(sha256(bin).digest()).digest()[::-1].hex() return txid

Raw Legacy

t0 = ('0200000001cd3b93f5b24ae190ce5141235091cd93fbb2908e24e5b9ff6776ae' 'c11b0e04e5000000006b4830450221009f156db3585c19fe8e294578edbf5b5e' '4159a7afc3a7a00ebaab080dc25ecb9702202581f8ae41d7ade2f06c9bb9869e' '42e9091bafe39290820438b97931dab61e140121030e669acac1f280d1ddf441' 'cd2ba5e97417bf2689e4bbec86df4f831bf9f7ffd0fdffffff010005d9010000' '00001976a91485eb47fe98f349065d6f044e27a4ac541af79ee288ac00000000')

Raw Segwit

t1 = ('0200000000010100ff121dd31ead0f06e3014d9192be8485afd6459e36b09179' 'd8c372c1c494e20000000000fdffffff013ba3bf070000000017a914051877a0' 'cc43165e48975c1e62bdef3b6c942a38870247304402205644234fa352d1ddbe' 'c754c863638d2c26abb9381966358ace8ad7c52dda4250022074d8501460f4e4' 'f5ca9788e60afafa1e1bcbf93e51529defa48317ad83e069dd012103adc58245' 'cf28406af0ef5cc24b8afba7f1be6c72f279b642d85c48798685f86200000000')

UPDATE Raw Segwit with flags and tx_witnesses stripped

t2 = ('02000000' '0100ff121dd31ead0f06e3014d9192be8485afd6459e36b09179' 'd8c372c1c494e20000000000fdffffff013ba3bf070000000017a914051877a0' 'cc43165e48975c1e62bdef3b6c942a3887' '00000000')
print(f"t0: {txid(t0)}\nt1: {txid(t1)}\nt2: {txid(t2)}")

TXN_IDs from the above python

t0: cb33472bcaed59c66fae30d7802b6ea2ca97dc33c6aad76ce2e553b1b4a4e017

t1: b11fdde7e3e635c7f15863a9399cca42d46b5a42d87f4e779dfd4806af2401ce

t2: d360581ee248be29da9636b3d2e9470d8852de1afcf3c3644770c1005d415b30

TXN_IDs from Electrum

t0: cb33472bcaed59c66fae30d7802b6ea2ca97dc33c6aad76ce2e553b1b4a4e017

t1: d360581ee248be29da9636b3d2e9470d8852de1afcf3c3644770c1005d415b30

```
submitted by brianddk to Bitcoin [link] [comments]

Government-backed cryptos are coming

World governments are making the move to government-backed cryptocurrencies.
German Banks pushing for digital Euro http://www.economo.co.uk/german-banks-are-pushing-for-a-swift-introduction-of-the-digital-euro/
US Paid Startup to explore USD Crypto https://futurism.com/the-byte/us-gov-paying-crypto-startup-explore-digital-dollar
China is way ahead of the game with the digital Yuan https://www.forbes.com/sites/billybambrough/2020/06/17/china-reveals-east-asia-crypto-scheme-to-rival-bitcoin-facebooks-libra-and-the-us-dolla#aaa355f3c804
Facebook has been working on their own crypto for some time and apparently major countries see it as a threat: https://cointelegraph.com/news/china-considering-east-asia-regional-cryptocurrency-to-rival-dollar-and-libra
https://news.bitcoin.com/fed-china/
This is a paradigm shift in global currencies.
It seems that this is how the world governments are going to get rid of the global debt problem. (https://theconversation.com/buckle-up-for-turbulence-why-a-global-debt-crisis-looks-very-hard-to-avoid-127260)
They will switch over to the new cryptos and inflate the old currency into oblivion taking the debt with it. That's what Germany did in the 1920s to get rid of the reparations payments from losing WWI.
https://en.wikipedia.org/wiki/Hyperinflation_in_the_Weimar_Republic
There are a lot of really scary things that can happen with government-backed cryptos. For example, they can track everything that you do, cut you off instantly from making transactions, etc.
All the government has to do to make the switch is to make the next stimulus check only available in the new crypto and BANG. A new currency is adopted.
These really are crazy times.
submitted by mulletator to economy [link] [comments]

Questions about Bitcoin reorganization process logic with a rev*.dat file format or byte map.

Hi, I’m currently learning how bitcoin operates by studying the BitcoinCore code and several other bitcoin projects, most of them parsers, and came to a topic of blockchain data storage of blk*.dat and rev*.dat.
While blk*.dat format is more or less documented and the process is described really good (https://learnmeabitcoin.com/guide/blkdat) most of the resources are lacking detailed descriptions of rev*.dat file format and how the process of handling blockchain reorganization (block undo) works. Some Parsers (https://github.com/citp/BlockSci) have rules not to parse new blocks before a certain amount of confirmations so they do not need to deal with the issues of reorganization.
Right now I’m very interested in the logic of blockchain reorganization and found some descriptions:https://en.bitcoin.it/wiki/Bitcoin_Core_0.11_(ch_2):_Data_Storage#Raw_undo_data_.28rev.2A.dat.29:Data_Storage#Raw_undo_data.28rev.2A.dat.29) And an awesome post reply by Pieter Wuille: https://bitcoin.stackexchange.com/questions/57978/file-format-rev-dat I even tried to visualize that answer in a picture: https://prnt.sc/s4ile4
The problem is that all those explanations are dated because of the update (https://github.com/bitcoin/bitcoin/pull/10195) that replaced CTxInUndo class with Coin class (https://github.com/bitcoin/bitcoin/commit/cb2c7fdac2dc74368ed24ae4717ed72178956b92 )
I know that code is the best documentation, but I still find it hard to read and understand, so I’m asking for help to answer these questions:
Apart from learning how everything works, I’m also interested in these topics because they say that it’s possible to get blockstasts faster using rev*.dat files (https://github.com/bitcoin/bitcoin/pull/14802) and I want to properly picture the whole processes with the rev*.dat files.
submitted by cyberwarboy to Bitcoin [link] [comments]

12632 BTC PUZZLE ~(Approximately $80 Million)

12632 BTC PUZZLE ~(Approximately $80 Million)

12632.37162517 BTC hidden in this picture below:
12632.37162517 BTC hidden in 1CoV19
Figure it out, find the key to the Bitcoin, and claim the prize.
Whoever cracks the code can do whatever he/she wants (including donating to charity).
While solving the puzzle you can find private keys to 5 more BTC addresses with huge value.
Congrats to the genius who figures it out.
View the address:16eht5osxarvsX9rFBuNgey18N3TFxeE1P
HINTS:
Address: 1CoV19Nw1731inbx38t3Y2mcdnCehA9FmJ
12 Words 1CoV19.jpeg
A=16eht5osxarvsX9rFBuNgey18N3TFxeE1P
B=1CoV19Nw1731inbx38t3Y2mcdnCehA9FmJ
Private Key A= SHA256(passphrase) 1CoV19.jpeg + B
Mnemonic Code Converter
Sha256 — Reverse lookup, unhash and decrypt

Example:
This private key: KyTxSACvHPPDWnuE9cVi86kDgs59UFyVwx2Y3LPpAs88TqEdCKvb
The public address is:13JNB8GtymAPaqAoxRZrN2EgmzZLCkbPsh
The raw bytes for the private key:4300d94bef2ee84bd9d0781398fd96daf98e419e403adc41957fb679dfa1facd
These bytes are actually sha256 of this public address! 1LGUyTbp7nbqp8NQy2tkc3QEjy7CWwdAJj
....more Examples:
1HwxL1vutUc42ikh3RBnM4v2dVRHPTrTve from Sha256(1FfmbHfnpaZjKFvyi1okTjJJusN455paPH)
1FNF3xfTE53LVLQMvH6qteVqrNzwn2g2H8 from Sha256(1H21ndKEuMqZbeMMCqrYArCdV8WeicGehB
13FzEhD3WpX682G7b446NFZV6TXHH7BaQv Sha256(1E1rSGgugyNYF3TTr12pedv4UHoWxv5CeD)
1LVRWmpfKKcRZcKvi5ZGWGx5wU1HCNEdZZ Sha256(1CVPe9A5xFoQBEYhFP46nRrzf9wCS4KLFm)
1HhNZhMm4YFPSFvUXE6wLYPx63BF7MRJCJ Sha256(145Sph2eiNGp5WVAkdJKg9Z2PMhTGSS9iT)
1G6qfGz7eVDBGDJEy6Jw6Gkg8zaoWku8W5 Sha256(18EF7uwoJnKx7YAg72DUv4Xqbyd4a32P9f)
1MNhKuKbpPjELGJA5BRrJ4qw8RajGESLz6 Sha256(15WLziyvhPu1qVKkQ62ooEnCEu8vpyuTR5)
18XAotZvJNoaDKY7dkfNHuTrAzguazetHE Sha256(15SP99eiBZ43SMuzzCc9AaccuTxF5AQaat)
1HamTvNJfggDioTbPgnC2ujQpCj4BEJqu Sha256(14nuZCWe76kWigUKAjFxyJLFHQyLTsKXYk)
17iqGkzW5Y7miJjd5B2gP5Eztx8kcCDwRM Sha256(1MB3L1eTnHo1nQSN7Lmgepb7iipWqFjhYX)
15M7QfReFDY2SZssyBALDQTFVV1VDdVBLA Sha256(16bjY7SynPYKrTQULjHy8on3WENxCmK4ix)
1LgwKwv9kt8BwVvn6bVWj8KcqpP9JSP1Mh Sha256(1Q81rAHbNebKiNH7HD9Mh2xtH6jgzbAxoF)


Address: 1CoV19Nw1731inbx38t3Y2mcdnCehA9FmJ
will be the next Puzzle if the community decides to raise its value.
Its private key hints will revealed here to solve.
Good Luck .....
submitted by CovidBTC to Bitcoin [link] [comments]

ECDSA In Bitcoin

Digital signatures are considered the foundation of online sovereignty. The advent of public-key cryptography in 1976 paved the way for the creation of a global communications tool – the Internet, and a completely new form of money – Bitcoin. Although the fundamental properties of public-key cryptography have not changed much since then, dozens of different open-source digital signature schemes are now available to cryptographers.

How ECDSA was incorporated into Bitcoin

When Satoshi Nakamoto, a mystical founder of the first crypto, started working on Bitcoin, one of the key points was to select the signature schemes for an open and public financial system. The requirements were clear. An algorithm should have been widely used, understandable, safe enough, easy, and, what is more important, open-sourced.
Of all the options available at that time, he chose the one that met these criteria: Elliptic Curve Digital Signature Algorithm, or ECDSA.
At that time, native support for ECDSA was provided in OpenSSL, an open set of encryption tools developed by experienced cipher banks in order to increase the confidentiality of online communications. Compared to other popular schemes, ECDSA had such advantages as:
These are extremely useful features for digital money. At the same time, it provides a proportional level of security: for example, a 256-bit ECDSA key has the same level of security as a 3072-bit RSA key (Rivest, Shamir и Adleman) with a significantly smaller key size.

Basic principles of ECDSA

ECDSA is a process that uses elliptic curves and finite fields to “sign” data in such a way that third parties can easily verify the authenticity of the signature, but the signer himself reserves the exclusive opportunity to create signatures. In the case of Bitcoin, the “data” that is signed is a transaction that transfers ownership of bitcoins.
ECDSA has two separate procedures for signing and verifying. Each procedure is an algorithm consisting of several arithmetic operations. The signature algorithm uses the private key, and the verification algorithm uses only the public key.
To use ECDSA, such protocol as Bitcoin must fix a set of parameters for the elliptic curve and its finite field, so that all users of the protocol know and apply these parameters. Otherwise, everyone will solve their own equations, which will not converge with each other, and they will never agree on anything.
For all these parameters, Bitcoin uses very, very large (well, awesomely incredibly huge) numbers. It is important. In fact, all practical applications of ECDSA use huge numbers. After all, the security of this algorithm relies on the fact that these values are too large to pick up a key with a simple brute force. The 384-bit ECDSA key is considered safe enough for the NSA's most secretive government service (USA).

Replacement of ECDSA

Thanks to the hard work done by Peter Wuille (a famous cryptography specialist) and his colleagues on an improved elliptical curve called secp256k1, Bitcoin's ECDSA has become even faster and more efficient. However, ECDSA still has some shortcomings, which can serve as a sufficient basis for its complete replacement. After several years of research and experimentation, a new signature scheme was established to increase the confidentiality and efficiency of Bitcoin transactions: Schnorr's digital signature scheme.
Schnorr's signature takes the process of using “keys” to a new level. It takes only 64 bytes when it gets into the block, which reduces the space occupied by transactions by 4%. Since transactions with the Schnorr signature are the same size, this makes it possible to pre-calculate the total size of the part of the block that contains such signatures. A preliminary calculation of the block size is the key to its safe increase in the future.
Keep up with the news of the crypto world at CoinJoy.io Follow us on Twitter and Medium. Subscribe to our YouTube channel. Join our Telegram channel. For any inquiries mail us at [[email protected]](mailto:[email protected]).
submitted by CoinjoyAssistant to Bitcoin [link] [comments]

📣 KuCoin Günlük Raporu📣


12 Haziran 2020 (UTC + 8)

🔥KuCoin Marketleri🔥
Token Son Fiyat (USD) 24s Değişim
KCS 0.9256 -3.60%
BTC 9473,7 -2,98%
ETH 237.01 -3.22%
LTC 44.382 -3.77%
EOS 2.5808 -5.31%

👏🏻Haberler👏🏻
👉DigiByte (DGB), 28.000 DGB ile KuCoin AMA'ya katılın!
👉USDN Soft Staking'in APR'sinin Düzeltilmesine İlişkin Duyuru
👉KuCoin Blogu: En Zengin Bitcoin Balinası Kimdir?
👉KuCoin Marjin Ticareti Testi: 10 USDT kazanın
👉Cardano (ADA) Para Yatırma ve Para Çekme Hizmetleri Şimdi Açık
👉KuCoin, INR, ARS ve PHP dahil 17 Fiat Para Birimi ile Kripto Alımı Desteği Ekledi
👉Presearch (PRE) Listeleme Kampanyası: Tüccarlara ve Kullanıcılara 1.000.000 PRE Ödül!

😍Promosyonlar😍
👉https://twitter.com/kucoincom/status/1271359662441377792
👉https://www.kucoin.com/news/en-pre-listing-campaign
submitted by KCTurkeyCM2 to kucointurkey [link] [comments]

📣 KuCoin Daily Report📣 June 12, 2020 (UTC+8)

🔥KuCoin Markets🔥 Token Last Price (USD) 24H Change KCS 0.9256 -3.60% BTC 9473.7 -2.98% ETH 237.01 -3.22% LTC 44.382 -3.77% EOS 2.5808 -5.31%
👏🏻News👏🏻 👉Join the KuCoin AMA with DigiByte (DGB), 28,000 DGB to Give Away! 👉Announcement Regarding the Adjustment of the APR of USDN Soft Staking 👉KuCoin Blog: Who Is the Richest Bitcoin Whale? 👉KuCoin Margin Trade Quiz: Win 10 USDT 👉Cardano (ADA) Deposit and Withdrawal Services Now Open 👉KuCoin Adds Support for Purchasing Crypto With 17 More Fiat Currencies, Including INR, ARS and PHP 👉Presearch (PRE) Listing Campaign: 1,000,000 PRE to be Won by Traders & Users!
😍Promotions😍 👉https://twitter.com/kucoincom/status/1271359662441377792 👉https://www.kucoin.com/news/en-pre-listing-campaign
submitted by KCSpainTL to kucoinspain [link] [comments]

Weekly Update: 1 Million ParJar Tips, Fantom.finance, SelfKey Mobile Wallet, Sentivate Social... – 6 Mar - 12 Mar'20

Weekly Update: 1 Million ParJar Tips, Fantom.finance, SelfKey Mobile Wallet, Sentivate Social... – 6 Mar - 12 Mar'20
As Coronavirus (COVID-19) wreaks havoc across the world, we hope that Parachuters are safe, at home and healthy. This has been a difficult few months for everyone. But we will get over it. So let’s spread some good vibes with an update filled with awesome news from the Parachuteverse. Here’s your week at Parachute + partners (6 Mar - 12 Mar'20):

Starting off with a biggie. This week we crossed 1 million ParJar tips with a grand party in the Tiproom that left heads spinning and massive hangover. Haha! Click here for a sneak peek into the madness. Those who missed the party, woke up to 30k+ messages. And that happened within a couple of hours only. Wild! If that wasn’t enough, the TTR crew followed it up with a tiproom tipbattle with 6 teams (10 members each) fighting it out. Click here for the team lineups and rules. What ensued was a whirlwind comprising 80k+ tips. Double wild! LordHades shared the latest #FPL update according to which Novelcloud has now crossed LH to take second position. Alexis continues to be on top. If you’re already on BAGS token’s Dirty Bags platform, don’t forget to check out the Parachute posts over there. If you’re not on it yet, there’s $BAGS prizes for Parachuters who sign up. Bose’s random trivia in TTR got folks scratching their heads for answers.
A Gian food pic after ages. Though not cooked by him. Peruvian chicken. Yum!
Alejandro hosted a free-for-all CoD flash game in the Parachute War Zone followed by a battle royale. Congratulations to Clinton for being awarded the Bronze Seal of Transparency for his charity. GamrB0y’s trivia in TTR this week was based on science. Victor hosted a TTR quiz themed on MetaHumans. Charlotte’s math trivia was uber fun as always. Jobchain crew sponsored 750k $JOB as prizes for a round Robot Rise in the ParJar Gaming channel. Cap held a flash Parena this week. If you haven’t been keeping a tab on Parachute, you just missed on scoring some sweet $PAR. Like Achilleas almost did with his top prize. He won the finale but wasn't around to claim his 1st prize. So Bose snagged the winner’s spoils. But Cap being Cap made sure he didn’t miss out either. For Two-for-Tuesday this week, Gian got Parachuters to post music videos "featuring bands or songs that have a food or drink in their name". Like always, Sebastian was kind enough to compile a playlist with everyone’s posts. A flurry of beta testing activities related to Transak (fiat on/off ramp for ParJar) and swapping flung into action this week. For this week's #wholesomewed, Jason asked Parachuters "to draw a fierce non-existant creature that you would like as your champion in a parena".
What an amazing view Alexis!
In this week’s educational posts from aXpire, COO Matthew Markham wrote about the state of the legal tech market, the E-Billing industry, why legal billing software matters and artificial intelligence in law firm software. For the latest update video, click here. Still not sure what aXpire is all about? Check out their token overview and business presentation. The weekly 20k $AXPR token burn went ahead as per schedule. Insights from 2gether’s consumer report were published in a Cointelegraph article exploring women’s usage behaviour in crypto. For the full report on female users, click here. Euro deposits on the platform were briefly paused and subsequently restored because of a third party dependency. Upgrades were made to the $BTC transfer mechanism as well. But a high traffic issue led to a temporary stoppage of the crypto purchase feature. Birdchain released its 2 year roadmap. Few weeks back, we shared news of $BIRD being listed on Probit. CEO Joao Martins talked more about it in his video podcast this week. Probit also started a stake and earn event for $BIRD holders. Ethos’ parent company Voyager is now a sponsor of Scott Melker’s (The Wolf of All Streets) new podcast. For the latest Switch update, click here. Fantom announced the pre-launch of Fantom.finance which will be an end-to-end DeFi suite of products. The project has been killing it on its socials. Want to see proof? Check out the social metric graph mapped by LunarCRUSH. Michael made a weekly update video to catch up on all the latest news. Click here to read the latest technical update. Fantom also announced its involvement in Fusion Protocol’s decentralised custodian solution DCRM Alliance.
Interesting insights from 2gether’s female crypto users report
The new XIO website layout and a new set of article were released this week. Zachary did a deep dive into the new stuff with a 40 minute video. For this week’s #XIOSocial discussions, Citizens talked about underrated qualities of successful entrepreneurs and about progressive decentralisation. DigiByte joined Uptrennd this week with their own community on the platform. Uptrennd crew marked the occasion with a cool giveaway. Looking to join the team? Don’t forget to apply for the open positions. How has the platform been fairing in the last 3 months vis-à-vis other platforms? Check out the numbers. Plus, congrats on crossing 70k members. YouTuber Chico Crypto joined Uptrennd this week. District0x’s weekly update covers news such as the new District Designer, latest Dapp Digest etc. Meme Factory launched a new contest. Hydro integrated Plaid’s account verification and aggregation services to its platform this week. This was followed by additional integrations with KYC provider Onfido and financial data provider MX. Silent Notary crew has created a new fund for pursuing IDL’s listing opportunities. Looking for human connections during the Coronavirus lockdown? OST’s Pepo app now has a dedicated community channel for this. SelfKey’s Mobile Wallet was launched this week. CoinLoan joined SelfKey’s crypto lending marketplace. Moreover, crypto exchange Bitkub was added to the exchange marketplace. Plus, the team compiled a list of data breaches at Facebook.
The new Crowdstaking graphic explains how it is different from crowdfunding
Realtime market widgets and downloads page were added to the Sentivate social site this week along with a ton of other upgrades. The beta test of the platform has also been a success on Windows and Mac. The browser build is ongoing with a naming contest to begin soon. If you have been keeping your eyes open, BAGS crew have been hosting some fun quizzes in the Dirty Bags channel for $BAGS prizes. Make sure to have a look when you have a moment. Last year, around this time, Pynk won the startup pitch competition at Wolves Summit. This week, CEO Seth Ward and COO Rupert Barksfield shared 8 tips for aspirants. The community also discussed about Facebook’s Libra Alliance this week. CyberFM started a special playlist on the Spotlight Channel to celebrate Women’s History Month. Harmony showcased its transaction speed and fees compared to Ethereum through a video demo. Plus, a fast finality demonstration. Click here to read last week’s #pow thread. If you would rather watch the video update, click here. Founder Stephen Tse shared some more updates over live videos (1, 2, 3, 4). And kudos for being the most active project on GitHub last week. The crew sat down with Vite Labs for a community AMA. The roadmap towards launching Open Staking was published. It is currently in the second phase out of four phases. Testers and hackers were welcomed to participate in Stake Heist - try and break the open staking design on the Pangaea testnet for 10M $ONE tokens in prizes.
The Sentivate social site community dashboard looks fresh!
Intellishare founder Raymond Xiong will sit down for a community AMA next week. Folks who sent in questions could win 50 $INE tokens as well. GET Protocol’s GUTS Tickets featured in a list of recommended portals for safe ticket purchases by the Netherlands’ Police. As part of its ticketing transparency standards documentation series, developer Kasper Keunen wrote about nodes this week. The $COTI conversion bridge has been reopened with some limits to ensure fair chance for everyone looking to convert from mainnet to ERC20/BEP2 tokens. For the latest newsletter, click here. The new COTI explorer was released as well. Apart from simple wallet-to-wallet transactions, it also tracks merchant txns, bridge txns etc. The dev team also released a detailed article explaining its multi-currency (MultiDAG) framework. For the token deployment demo, click here.

And with that, it’s a close for this week in Parachute! See you again soon. Bye!
submitted by abhijoysarkar to ParachuteToken [link] [comments]

Relictum Pro — Blockchain 5.0 di ultima generazione

Relictum Pro — Blockchain 5.0 di ultima generazione


I problemi

Tuttavia, nonostante tutto il suo potere e la sua superiorità, la Blockchain è progettata per evolversi nel corso degli anni. Perché ciò che sembrava essere efficace e accettabile un paio di anni fa non soddisfa più i suoi obiettivi e non ha nemmeno il tempo di soddisfare i suoi indicatori più importanti, vale a dire la velocità di elaborazione delle transazioni, la scalabilità e la sicurezza. Quali sono esattamente i seguenti punti riepilogativi:
Blockchain 1.0 Nonostante il fatto che la prima criptovaluta al mondo, Bitcoin, con il suo Ledger, abbia originato l’intero mercato esistente per la tecnologia blockchain. Bitcoin ha una serie di sfumature e carenze. Quale Blockchain 2.0 ha cercato di eliminare. Vale a dire, la nascita della seconda criptovaluta Ethereum con tutti i vantaggi e le caratteristiche che ne conseguono, incluso un contratto intelligente appositamente progettato e sviluppato. E qui la tecnologia ha raggiunto i suoi limiti oltre i quali Blockchain 3.0 ha provato a fare un passo. Durante lo sviluppo di cui la tecnologia DAG è stata sviluppata e implementata con la sua maggiore velocità di elaborazione delle transazioni, nonché i costi della Commissione ridotti. Ma si è scoperto che queste caratteristiche tecniche non erano sufficienti. Pertanto, gli sviluppatori sono arrivati ​​alla quarta generazione di blockchain per tentativi ed errori, in cui sia la velocità di riempimento dei nodi che il volume del blocco stesso nella rete sono stati notevolmente migliorati, il cui volume massimo è stato ridotto a soli 268 byte .
In ogni caso, ciò non ha aiutato a far fronte a molti problemi esistenti all’interno della rete decentralizzata. Ma non avere fretta di disperare. Dopotutto, non è per niente che siamo qui insieme a te oggi, perché oggi voglio presentarti una generazione completamente nuova di Blockchain 5.0. È semplicemente inutile confrontarlo con tutti i suoi predecessori. Dalla guida della rivoluzione Blockchain 5.0, un progetto chiamato Relictum Pro. Di cui voglio parlarti più dettagliatamente oggi.


A proposito del progetto

Relictum Pro è la più potente piattaforma intellettuale esistente negli ultimi dieci anni, basata su una generazione completamente nuova e unica di Blockchain 5.0. L’obiettivo principale è quello di creare un nuovo registro di distribuzione per la formalizzazione dell’intera vita economica di ciascun individuo. In altre parole, la Blockchain 5.0 contribuisce non solo alla registrazione degli eventi, ma è anche responsabile della registrazione del flusso di documenti, della consegna, del trasporto e della logistica dell’attività personale dell’utente e di qualsiasi altra organizzazione legale.
In una parola, l’applicazione Relictum Pro intende risolvere contemporaneamente più attività contemporaneamente, utilizzando il suo protocollo univoco, che è stato sviluppato sulla base dell’IP TCP. Questo, combinato con Blockchain 5.0, non solo aumenterà la velocità di trasmissione di tutte le transazioni, ma formerà anche un canale di comunicazione virtuale con ogni singolo nodo tramite il World Wide Web. Questo metodo di trasferimento delle informazioni consente a Relictum Pro di trasferire non solo le informazioni più familiari, ma anche interi blocchi, byte e altri tipi di file inerenti agli utenti esterni.


Caratteristiche

Questo perché gli sviluppatori di Blockchain 5.0 sono riusciti a ridurre la dimensione dei loro blocchi fino a 120 byte, che è 8 mila volte inferiore al valore di un blocco per Bitcoin. Che a sua volta è pari a 1 milione di 24 mila byte o 1 MB. Questo tipo di caratteristica distintiva può trasformare l'intero principio della trasmissione dei dati tramite una rete decentralizzata, accelerando così non solo la velocità di elaborazione delle transazioni, ma anche la sua ricerca. Che penso sia molto importante e appropriato in questi giorni, quando ogni frazione di secondo vale il suo peso in oro.
Pertanto, la presenza di strumenti ad alta tecnologia nel sistema Relictum Pro gli consente di diventare un sistema più coeso per la memorizzazione di dati finanziari, medici e personali. Allo stesso tempo, senza violare il sistema di sicurezza e protezione, ridimensiona la tua blockchain a 10 miliardi di utenti nella rete. Sembra davvero fenomenale.
A proposito, la protezione biometrica aiuta a garantire la sicurezza di questo livello, di cui parleremo ora in modo più dettagliato.

Protezione biometrica

Sono sicuro che molti di voi hanno una comprensione parziale o completa di ciò che questo tipo di protezione è. Naturalmente, nella vita di tutti i giorni, ci sono tipi assolutamente diversi di protezione biometrica. Possono essere basati sull'impronta digitale o sulla retina dell'occhio o, ad esempio, scansionando il viso. L'introduzione e l'apparizione di questo livello di protezione sono stati causati da un eccessivo afflusso di truffatori in varie aree della nostra vita. Soprattutto spesso questi truffatori si trovano dove ci sono molti soldi.
E come sai, il mondo delle criptovalute non fa eccezione, che in realtà è stato segnalato negli ultimi anni da più di una dozzina di furti molto grandi dei principali scambi di criptovalute. Ma i tempi stanno cambiando e gli sviluppatori stanno facendo del loro meglio per proteggere se stessi e i propri utenti da cripomacchine inadeguate. Presentazione dell'autenticazione a due fattori e di altri dati biometrici. Aumentare il livello di sicurezza di ciascun utente crittografico attivo.
Gli sviluppatori di Relictum Pro hanno anche preso atto del sistema di verifica dei dati biometrici. Pertanto, abbiamo sviluppato il nostro sistema di riconoscimento facciale biometrico basato su Blockchain 5.0, combinandolo con SecureCall (ovvero con una telefonata dopo la quale l'utente dovrà inserire la propria password). L'uso di questi strumenti garantisce la massima sicurezza per ogni membro dell'app Relictum Pro. Dopotutto, anche se un hacker in qualche modo rompe il primo hash, trovare una seconda chiave diventerà un vero problema.

Vantaggi

Quindi, vediamo quanto è potente e interessante il progetto Relictum Pro con la sua Blockchain 5.0. Dopotutto, grazie a questo sistema, gli utenti troveranno un unico strumento per la circolazione di tutta la loro vita. Poiché senza troppe difficoltà, ma con la massima velocità di trasferimento dei dati e un elevato grado di sicurezza, gli utenti senza intermediari, cioè, possono scambiare direttamente tutti i tipi di dati. Utilizzando un sistema illimitato di contratti intelligenti insieme alle tecnologie più avanzate che utilizzano elementi di intelligenza artificiale e reti neurali.
Offrendo un prodotto all’avanguardia, senza pari, che si rivolge sia ai volumi di utilizzo esistenti sia ai processori più potenti, compresi anche i computer fotonici. E te lo sto già dicendo molto seriamente in generale!
Allo stesso tempo, come ho già accennato, la piattaforma stessa può funzionare sia in modalità privata che aziendale per le aziende, formalizzando l’intero flusso di documenti esistente all’interno dell’organizzazione, che è disponibile anche a livello internazionale dell’economia.

Conclusione

Per riassumere, è difficile mantenere le tue parole di ammirazione per il team di specialisti che ha lavorato alla creazione di un progetto davvero eccezionale chiamato Relictum Pro. Dopotutto, tutti i loro risultati hanno permesso all’intero settore della tecnologia Blockchain di fare un passo avanti, rivelando modi semplicemente illimitati di comunicare gli utenti all’interno della sua piattaforma decentralizzata. Che, a sua volta, ti ricorderò, include assolutamente tutte le aree dell’attività economica umana nel quadro di un registro distribuito accessibile.
Ma poiché la struttura di tutti i processi interni di Relictum Pro è semplicemente incredibile, è interessante e tecnicamente complessa. Quindi non mi sono preso la responsabilità di descriverlo nel mio articolo nel modo più dettagliato. Pertanto, se sei interessato ad approfondire i dettagli e la loro intera struttura, alla fine dell’articolo troverai tutte le risorse sociali ufficiali di Relictum Pro con il suo documento tecnico dettagliato. Dove puoi facilmente trovare tutte le informazioni di cui hai bisogno.
Ed è qui che il mio articolo è finito. Sono sicuro che eri interessato a conoscere Relictum Pro. Pertanto, sarò felice se mi supporterai con i tuoi like e commenterai questo problema. Inoltre, non dimenticare di iscriverti alle mie risorse in modo da non perdere i progetti più interessanti da me.

Risorse ufficiali del progetto Relictum Pro:

WEBSITE: https://relictum.pro/ PARTNER: https://relictum.pro/partner-link/SxmA75L TELEGRAM: https://t.me/Relictum_Pro_Official WHITEPAPER: https://relictum.pro/cabinet/docs/whitepaper_en.pdf ANN THREAD: https://bitcointalk.org/index.php?topic=5221631 FACEBOOK: https://www.facebook.com/relictump TWITTER: https://twitter.com/relictumpro MEDIUM: https://www.medium.com/@relictumpro REDDIT: https://www.reddit.com/userelictumpro/ LINKEDIN: https://www.linkedin.com/company/relictumpro INSTAGRAM: https://www.instagram.com/relictum.pro/ YOUTUBE: https://www.youtube.com/channel/UCvj6aITqEO76WXPgwfjzfYw

Autore:

Bitcointalk username: Nfzgrld Bitcointalk profile: https://bitcointalk.org/index.php?action=profile;u=227462
submitted by nikolaalkov to u/nikolaalkov [link] [comments]

(SocketAsyncEventArgs) How to "continue" receiving new messages?

Following the MSDN example (https://docs.microsoft.com/en-us/dotnet/api/system.net.sockets.socketasynceventargs?view=netcore-3.1) and other examples on the internet, in all their ProcessReceive() methods they close the socket if the BytesTransferred == 0 but that ends the connection and communication. I want to keep the connection open and receive any other messages that will be sent after some time. Right now I'm doing this: ConnectAsync() if successful pass socket to another arg and StartSent() if send completed then StartReceive() and everything is fine to this point. But the problem is that at some point ProcessReceive() is called over and over with 0 BytesTransferred so I'll get a StackOverflowException. How should I fix this without closing the socket? Should I start "listening" after a receive is completed instead? Here is the code: https://github.com/Autarkysoft/Denovo/blob/aef94335ddc11961666dd462a07b2f02a1f5f7d7/Src/Autarkysoft.Bitcoin/P2PNetwork/Node.cs#L227-L256
submitted by Coding_Enthusiast to csharp [link] [comments]

What are the top #10 crypto coins everyone should know?

Top 10 Crypto Coins you might not (yet) have heard about (but are important to know)

Ever heard of Bitcoin, Bitcoin Cash and maybe Ether? That‘s a rather rhetorical question as you have somehow found your way to this article. Knowledge about the existence of crypto currencies, mostly about bitcoin is part of the technology mainstream. About 9 out of 10 Americans have knowledge about bitcoin as latest enquiries show. That raises two interesting questions:

1) How far along the way is the mass adoption of crypto currencies worldwide?

Everybody knowing about something should mean also everybody using it, correct? For bitcoin (and also other crytos) that does not seem to be true. There are around 35 million bitcoin wallets worldwide and around 50 million bitcoin users. That is not even 1% of our global population. Bitcoin and other cryptos are still not part of everyday life for the majority of humanity. If this feels different for you you might be living in a bubble. The adoption however is an important measure when it comes to anticipating a future price increase in the value of bitcoin. Which leads us to the second interesting question:

2) What are the crypto coins that are less well known but still show potential

Besides bitcoin there are other crypto currencies, also called alternative coins or altcoins. Bitcoin is the dominant crypto coin capturing a overall market cap of around 70% – 75%. This means that from all investments done into cryptos around 70% – 75% are placed into bitcoins. Whenever there is a bull rally in the markets, altcoins tend to outperform the market leader bitcoin. Imagine this effect similarly to the S&P 500 Index encompassing the top 500 US companies. When the S&P 500 Index value increases 1% this can mean that one index constituent actually increased by 30% in value pushing the overall index value.
Here a list of interesting altcoins you might want to follow more closely in the future (not connected to any type of investment advice whatsoever):
Waves (WAVES)
Waves is the coin of the Waves platform, a blockchain platform for custom tokens. Custom tokens target a mass market and allow users with limited technical knowledge to build virtually any type of use case based on the token. Waves USP is user friendliness as well that reflects in their lite wallet as well.
Vertcoin (VTC)
Vertcoin calls itself the peoples coin which refers to Vertcoin‘s goal to be so easy that everyday people with desktop computers can mine Vertcoin. Vertcoin, on the market since 2014, aimed to equal out disadvantages of bitcoin by for example applying a proof-of-work mechanism with Lyra2REv3 as underlying hash function.
PotCoin (POT)
PotCoin aims to become the number one currency for the constantly growing cannabis industry. The initial idea was to have a payment method in place that would facilitate transactions in the legal marijuana industry – a industry still underserved by the classical banking sector. In 2015 PotCoin moved to a proof-of-stake mechanism.
Monero (XMR)
Monero‘s focus is anonymity. Unlike for example bitcoin, money in- and outflows are not publicly visible on Monero‘s blockchain. Transaction mining is also not possible as Monero is mixing transaction in such a manner that is basically impossible to reverse engineer useful information out of the data.
Komodo (KMD)
Komodo, in its core based on bitcoins blockchain, was launched to equal out the many disadvantages of Bitcoin. The ambition of Komodo reflects in the vast amount of features and coming features this coin is equipped with. Komodo started by allowing for real anonymity in transactions.
Dogecoin (DOGE)
Dogecoin started as a joke, as a parody to Bitcoin and its skyrocking success. In its core Dogecoin is similar to bitcoin or litecoin respectively. The biggest difference however is that (unlikes bitcoins 21 million coins limit) there is no limit for mining Dogecoins.
DigiByte (DGB)
If you feel that bitcoin is slow, insecure and bulky then DigiByte should be your coin of choice. It was created having mainly cybersecurity in mind. DigiByte is several times faster compared to Bitcoin and the coins have very favorable security features build in making it safer to use and creating use-cases in the IoT space for example.
Decred (DCR)
Decred is bringing grasroot democracy to the crypto world. With Bitcoin the complete power over the blockchain is in the hand of the miners. With Decred this power is split within the stakeholders (developers, miners and investors) by a transparent reward system. In addition to that Decred has many innovative features build in.
Dash (DASH)
Dash coin was designed with keeping an eye on user privacy. Transactions are not publicly accessible and mixed in a manner that it‘s impossible to reverse engineer. Dash became famous when they offered easy accessibility to their network for the inhabitants of Venezuela during their economic crisis.
BlackCoin (BLK)
BlackCoin was build with the focus to be fully working on the Proof-of-Stake principle, making it very fast in validating transactions. That not only makes it fun to use but is actually creating use-cases such as in e-commerce where a fast payment confirmation is critical.
Litecoin (LTC)
Litecoin was build as a competitor to Bitcoin and is one of the best known altcoins. Litecoin is fast in creating blocks (2,5 minutes) making validating transactions faster as well. Mining is distributed among the miners much better than bitcoin making centralisation much harder.
The featured coins here are subject to many risk factors including full or partial loss of value. The feature is not intended to serve as investment advice.

Are you among the winning early adopters?

All mentioned coins can be used to purchase anonymous domains and related anonymous webservices on our website BitDomain.BIZ. The reason for that is that early adoption has proven to be a winning strategy in the crypto space. That is why at BitDomain.BIZ we are constantly accepting new and promising crypto coins to purchase our anonymous digital publishing services.
submitted by FrankBitDomain to u/FrankBitDomain [link] [comments]

What are the top #10 crypto coins everyone should know?

Top 10 Crypto Coins you might not (yet) have heard about (but are important to know)

Ever heard of Bitcoin, Bitcoin Cash and maybe Ether? That‘s a rather rhetorical question as you have somehow found your way to this article. Knowledge about the existence of crypto currencies, mostly about bitcoin is part of the technology mainstream. About 9 out of 10 Americans have knowledge about bitcoin as latest enquiries show. That raises two interesting questions:

1) How far along the way is the mass adoption of crypto currencies worldwide?

Everybody knowing about something should mean also everybody using it, correct? For bitcoin (and also other crytos) that does not seem to be true. There are around 35 million bitcoin wallets worldwide and around 50 million bitcoin users. That is not even 1% of our global population. Bitcoin and other cryptos are still not part of everyday life for the majority of humanity. If this feels different for you you might be living in a bubble. The adoption however is an important measure when it comes to anticipating a future price increase in the value of bitcoin. Which leads us to the second interesting question:

2) What are the crypto coins that are less well known but still show potential

Besides bitcoin there are other crypto currencies, also called alternative coins or altcoins. Bitcoin is the dominant crypto coin capturing a overall market cap of around 70% – 75%. This means that from all investments done into cryptos around 70% – 75% are placed into bitcoins. Whenever there is a bull rally in the markets, altcoins tend to outperform the market leader bitcoin. Imagine this effect similarly to the S&P 500 Index encompassing the top 500 US companies. When the S&P 500 Index value increases 1% this can mean that one index constituent actually increased by 30% in value pushing the overall index value.
Here a list of interesting altcoins you might want to follow more closely in the future (not connected to any type of investment advice whatsoever):
Waves (WAVES)
Waves is the coin of the Waves platform, a blockchain platform for custom tokens. Custom tokens target a mass market and allow users with limited technical knowledge to build virtually any type of use case based on the token. Waves USP is user friendliness as well that reflects in their lite wallet as well.
Vertcoin (VTC)
Vertcoin calls itself the peoples coin which refers to Vertcoin‘s goal to be so easy that everyday people with desktop computers can mine Vertcoin. Vertcoin, on the market since 2014, aimed to equal out disadvantages of bitcoin by for example applying a proof-of-work mechanism with Lyra2REv3 as underlying hash function.
PotCoin (POT)
PotCoin aims to become the number one currency for the constantly growing cannabis industry. The initial idea was to have a payment method in place that would facilitate transactions in the legal marijuana industry – a industry still underserved by the classical banking sector. In 2015 PotCoin moved to a proof-of-stake mechanism.
Monero (XMR)
Monero‘s focus is anonymity. Unlike for example bitcoin, money in- and outflows are not publicly visible on Monero‘s blockchain. Transaction mining is also not possible as Monero is mixing transaction in such a manner that is basically impossible to reverse engineer useful information out of the data.
Komodo (KMD)
Komodo, in its core based on bitcoins blockchain, was launched to equal out the many disadvantages of Bitcoin. The ambition of Komodo reflects in the vast amount of features and coming features this coin is equipped with. Komodo started by allowing for real anonymity in transactions.
Dogecoin (DOGE)
Dogecoin started as a joke, as a parody to Bitcoin and its skyrocking success. In its core Dogecoin is similar to bitcoin or litecoin respectively. The biggest difference however is that (unlikes bitcoins 21 million coins limit) there is no limit for mining Dogecoins.
DigiByte (DGB)
If you feel that bitcoin is slow, insecure and bulky then DigiByte should be your coin of choice. It was created having mainly cybersecurity in mind. DigiByte is several times faster compared to Bitcoin and the coins have very favorable security features build in making it safer to use and creating use-cases in the IoT space for example.
Decred (DCR)
Decred is bringing grasroot democracy to the crypto world. With Bitcoin the complete power over the blockchain is in the hand of the miners. With Decred this power is split within the stakeholders (developers, miners and investors) by a transparent reward system. In addition to that Decred has many innovative features build in.
Dash (DASH)
Dash coin was designed with keeping an eye on user privacy. Transactions are not publicly accessible and mixed in a manner that it‘s impossible to reverse engineer. Dash became famous when they offered easy accessibility to their network for the inhabitants of Venezuela during their economic crisis.
BlackCoin (BLK)
BlackCoin was build with the focus to be fully working on the Proof-of-Stake principle, making it very fast in validating transactions. That not only makes it fun to use but is actually creating use-cases such as in e-commerce where a fast payment confirmation is critical.
Litecoin (LTC)
Litecoin was build as a competitor to Bitcoin and is one of the best known altcoins. Litecoin is fast in creating blocks (2,5 minutes) making validating transactions faster as well. Mining is distributed among the miners much better than bitcoin making centralisation much harder.
The featured coins here are subject to many risk factors including full or partial loss of value. The feature is not intended to serve as investment advice.

Are you among the winning early adopters?

All mentioned coins can be used to purchase anonymous domains and related anonymous webservices on our website BitDomain.BIZ. The reason for that is that early adoption has proven to be a winning strategy in the crypto space. That is why at BitDomain.BIZ we are constantly accepting new and promising crypto coins to purchase our anonymous digital publishing services.
submitted by FrankBitDomain to u/FrankBitDomain [link] [comments]

Update TKEYSPACE 1.3.0 on Android

Update TKEYSPACE 1.3.0 on Android

https://preview.redd.it/6w93e0afttx41.png?width=1400&format=png&auto=webp&s=c00989612ec2d52eb522405e6b6a98bf875e08bb
Version 1.3.0 is a powerful update to TkeySpace that our team has been carefully preparing. since version 1.2.0, we have been laying the foundation for implementing new features that are already available in the current version.
Who cares about the security and privacy of their assets is an update for you.
TkeySpace — was designed to give You full control over your digital assets while maintaining an exceptional level of security, which is why there is no personal data in the wallet: phone number, the email address that could be compromised by hackers — no identity checks and other hassles, just securely save the backup phrase consisting of 12 words.

Briefly about the TkeySpace 1.3.0 update :

  • Code optimization and switching to AndroidX;
  • New section-Privacy;
  • Built-in TOR;
  • Selecting the privacy mode;
  • Selecting the recovery method for each currency;
  • Choosing the address format for Litecoin;
  • Enhanced validation of transactions and blocks in the network;
  • Disk space optimization;
  • Accelerated syncing;
  • Checking “double spending”;
  • The bloom filter to check for nodes;
  • Updating the Binance and Ethereum libraries;
  • A function to hide the balance;
  • Advanced currency charts;
  • Access to charts without authentication;
  • News section;
  • Browser for Tkeycoin;
  • Independent Commission entry for Bitcoin;
  • New digital currencies;
  • Digital currency exchange tab.

Code optimization and switching to AndroidX

A lot of work has been done on optimizing the code to speed up the application, improving the logic, synchronization speed, calculating the hash of cryptocurrencies, and successfully switching to AndroidX.

https://preview.redd.it/h3go5tzgttx41.png?width=1100&format=png&auto=webp&s=bf311efc73e3577c80f06a21d6b9317bb93ae989

New section: Privacy

  • Enable Tor;
  • Blockchain transaction (the selection of the privacy mode);
  • Blockchain recovery (choosing a recovery method);
https://preview.redd.it/iydfwuhittx41.png?width=1080&format=png&auto=webp&s=2ce7c489d893a2ab6b9d6fede57d8b94404edcfb

TOR

Starting with the current update, the TkeySpace wallet can communicate via the TOR network, includes new privacy algorithms, and supports 59 different currencies.

https://i.redd.it/kn5waeskttx41.gif
Tor is a powerful privacy feature for those who own large assets or live in places where the Internet is heavily censored.
Tor technology provides protection against traffic analysis mechanisms that compromise not only Internet privacy, but also the confidentiality of trade secrets, business contacts, and communications in General.
When you enable TOR settings, all outgoing traffic from the wallet will be encrypted and routed through an anonymous network of servers, periodically forming a chain through the Tor network, which uses multi-level encryption, effectively hiding any information about the sender: location, IP address, and other data.
This means that if your provider blocks the connection, you can rest easy — after all, by running this function, you will get an encrypted connection to the network without restrictions.

https://preview.redd.it/w9y3ax4mttx41.png?width=960&format=png&auto=webp&s=972e375fc26d479e8b8d2999f7659ec332e2af55
In TOR mode, the wallet may work noticeably slower and in some cases, there may be problems with the network, due to encryption, some blockchain browsers may temporarily not work. However, TOR encryption is very important when Internet providers completely block traffic and switching to this mode, you get complete freedom and no blocks for transactions.

Confidentiality of transactions (the Blockchain transaction)

The wallet can change the model of a standard transaction, mixing inputs and outputs, making it difficult to identify certain cryptocurrencies. In the current update, you can select one of several modes for the transaction privacy level: deterministic lexicographic sorting or shuffle mode.

Mode: Lexicographic indexing

Implemented deterministic lexicographic sorting using hashes of previous transactions and output indexes for sorting transaction input data, as well as values and scriptPubKeys for sorting transaction output data;
We understand that information must remain confidential not only in the interests of consumers but also in higher orders, financial systems must be kept secret to prevent fraud. One way to address these privacy shortcomings is to randomize the order of inputs and outputs.
Lexicographic ordering is a comparison algorithm used to sort two sets based on their Cartesian order within their common superset. Lexicographic order is also often referred to as alphabetical order or dictionary order. The hashes of previous transactions (in reverse byte order) are sorted in ascending order, lexicographically.
In the case of two matching transaction hashes, the corresponding previous output indexes will be compared by their integer value in ascending order. If the previous output indexes match, the input data is considered equal.

Shuffle Mode: mixing (random indexing)

To learn more about how “shuffle mode” works, we will first analyze the mechanisms using the example of a classic transaction. Current balance Of your wallet: 100 TKEY, coins are stored at different addresses:
x1. Address-contains 10 TKEY. x2. Address-contains 20 TKEY. x3. Address-contains 30 TKEY. x4. Address-contains 15 TKEY. x5. Address-contains 25 TKEY.
Addresses in the blockchain are identifiers that you use to send cryptocurrency to another person or to receive digital currency.
In a classic transaction, if you need to send, for example, 19 TKEY — 100 TKEY will be sent to the network for “melting” coins, 19 TKEY will be sent to the Recipient, and ~80.9 TKEY will return to the newly generated address for “change” in your wallet.

https://preview.redd.it/x595qwdottx41.png?width=806&format=png&auto=webp&s=d9c2ae5620a3410ed83f7e16c018165c8ab35844
In the blockchain explorer, you will see the transaction amount in the amount of 100 TKEY, where 80.99999679 TKEY is your change, 19 TKEY is the amount you sent and 0.00000321 is the transaction fee. Thus, in the blockchain search engine, most of your balance is shown in the transaction.

How does the shuffle mode work?

Let’s look at a similar example: you have 100 TKEY on your balance, and you need to send 19 TKEY.
x1. Address-contains 10 TKEY. x2. Address-contains 20 TKEY. x3. Address-contains 30 TKEY. x4. Address-contains 15 TKEY. x5. Address-contains 25 TKEY.
You send 19 TKEY, the system analyzes all your addresses and balances on them and selects the most suitable ones for the transaction. To send 19 TKEY, the miners will be given coins with x2. Addresses, for a total of 20 TKEY. Of these, 19 TKEY will be sent to the recipient, and 0.99999679 TKEY will be returned to Your new address as change minus the transaction fee.

https://preview.redd.it/doxmqffqttx41.png?width=1400&format=png&auto=webp&s=5c99ec41363fe50cd651dc0acab05e175416006a
In the blockchain explorer, you will see the transaction amount in the amount of 20 TKEY, where 0.99999679 TKEY is Your change, 19 TKEY is the amount you sent and 0.00000321 is the transaction fee.
The shuffle mode has a cumulative effect. with each new transaction, delivery Addresses will be created and the selection of debit addresses/s that are most suitable for the transaction will change. Thus, if you store 1,000,000 TKEY in your wallet and want to send 1 TKEY to the recipient, the transaction amount will not display most of your balance but will select 1 or more addresses for the transaction.

Selecting the recovery method for each digital currency (Blockchain restore)

Now you can choose the recovery method for each currency: API + Blockchain or blockchain.
Note: This is not a syncing process, but rather the choice of a recovery method for your wallet. Syncing takes place with the blockchain — regardless of the method you choose.
https://preview.redd.it/gxsssuxrttx41.png?width=1080&format=png&auto=webp&s=cd9fe383618dda0e990e86485652ff95652a8481

What are the differences between recovery methods?

API + Blockchain

In order not to load the entire history of the blockchain, i.e. block and transaction headers, the API helps you quickly get point information about previous transactions. For example, If your transactions are located in block 67325 and block 71775, the API will indicate to the node the necessary points for restoring Your balance, which will speed up the “recovery” process.
As soon as the information is received, communication with the peers takes place and synchronization begins from the control point, then from this moment, all subsequent block loading is carried out through the blockchain. This method allows you to quickly restore Your existing wallet.
‘’+’’ Speed.
‘’-’’ The API server may fail.

Blockchain

This method loads all block headers (block headers + Merkle) starting from the BIP44 checkpoint and manually validates transactions.
‘’+’’ It always works and is decentralized. ‘’-’’ Loading the entire blockchain may take a long time.

Why do I need to switch the recovery method?

If when creating a wallet or restoring it, a notification (!) lights up in red near the selected cryptocurrency, then most likely the API has failed, so go to SettingsSecurity CenterPrivacyBlockchain Restore — switch to Blockchain. Syncing will be successful.

Selecting the address format

You can choose the address format not only for Bitcoin but also for Litecoin. Legacy, SegWit, Native SegWit. Go to SettingsManage WalletsAddress Format.

https://preview.redd.it/nqj0nwutttx41.png?width=1080&format=png&auto=webp&s=fc04b8ee8339ab27d3203ff551013cda7aa9e8db

Working at the code level

Enhanced validation of transactions and blocks in the network

Due to the increased complexity in the Tkeycoin network, we have implemented enhanced validation of the tkeycoin consensus algorithm, and this algorithm is also available for other cryptocurrencies.

What is the advantage of the enhanced validation algorithm for the user

First, the name itself speaks for itself — it increases the security of the network, and second, by implementing the function — we have accelerated the work of the TkeySpace blockchain node, the application consumes even fewer resources than before.
High complexity is converted to 3 bytes, which ensures fast code processing and the least resource consumption on your device.

Synchronization

The synchronization process has been upgraded. Node addresses are added to the local storage, and instant synchronization with nodes occurs when you log in again.

Checking for double-spending

TkeySpace eliminates “double-spending” in blockchains, which is very valuable in the Bitcoin and Litecoin networks.
For example, using another application, you may be sent a fake transaction, and the funds will eventually disappear from the network and your wallet because this feature is almost absent in most applications.
Using TkeySpace — you are 100% sure that your funds are safe and protected from fraudulent transactions in the form of “fake” transactions.

The bloom filter to check for nodes

All nodes are checked through the bloom filter. This allows you to exclude fraudulent nodes that try to connect to the network as real nodes of a particular blockchain.
In practice, this verification is not available in applications, Tkeycoin — decided to follow a new trend and change the stereotypes, so new features such as node verification using the bloom filter and double-spending verification are a kind of innovation in applications that work with cryptocurrencies.

Updating the Binance and Ethereum libraries

Updated Binance and Ethereum libraries for interaction with the TOR network.

Interface

Function — to hide the balance

This function allows you to hide the entire balance from the main screen.

Advanced currency charts and charts without authentication

Detailed market statistics are available, including volumes, both for 1 day and several years. Select the period of interest: 1 day, 7 days, 1 month, 3 months, 6 months, 1 year, 2 years.
In version 1.3.0, you can access charts without authentication. You can monitor the cryptocurrency exchange rate without even logging in to the app. If you have a pin code for logging in, when you open the app, swipe to the left and you will see a list of currencies.

https://preview.redd.it/f3thqv1wttx41.png?width=1080&format=png&auto=webp&s=1906307f7ad1fd6db47bf270ce7c57185267b1a3

News

In the market data section — in the tkeyspace added a section with current news of the cryptocurrency market.

https://preview.redd.it/lz1e7ynxttx41.png?width=1080&format=png&auto=webp&s=b6f1858d8752cfc6187df5d7b8a2ce25813e2366

Blockchain Explorer for Tkeycoin

Transaction verification for Tkeycoin is now available directly in the app.

Independent Commission entry for Bitcoin

Taking into account the large volume of the Bitcoin network, we have implemented independent Commission entry — you can specify any Commission amount.
For other currencies, smart Commission calculation is enabled based on data from the network. The network independently regulates the most profitable Commission for the sender.

New digital currencies

The TkeySpace wallet supports +59 cryptocurrencies and tokens.

Cryptocurrencies

Tkeycoin (TKEY), Bitcoin (BTC), Litecoin (LTC), Ethereum (ETH), Bitcoin Cash (BCH), DASH, Binance (BNB), EOS.

Stablecoins

TrueUSD (TUSD), Tether USD (USDT), USD Coin (USDC), Gemini Dollar (GUSD), STASIS EURO (EURS), Digix Gold Token (DGX), Paxos Standard (PAX), PAX Gold (PAXG), Binance USD (BUSD), EOSDT, Prospectors Gold (PGL).

ERC-20, BEP2, and EOS tokens

Newdex (NDX), DigixDAO ERC-20 (DGD), Chainlink ERC-20 (LINK), Decentraland ERC-20 (MANA), EnjinCoin ERC-20 (ENJ), the Native Utility (NUT), 0x Protocol ERC-20 (ZRX), Aelf ERC-20 (ELF), Dawn DAO ERC-20 (AURA), Cashaaa BEP2 (CAS), Bancor ERC-20 (BNT), the Basic Attention Token ERC-20 (BAT), Golem ERC-20 (GNT), Mithril ERC-20 (MITH), MEETONE, NEXO ERC-20, Holo ERC-20 (HOT), Huobi Token ERC-20 (HT), IDEX ERC-20, IDEX Membership ERC-20 (IDXM), Bitcoin BEP2 (BTCB), Waltonchain ERC-20 (WTC), KuCoin Shares ERC-20 (KCS), Kyber Network Crystal ERC-20 (KNC), Loom Network ERC-20 (LOOM), Ripple (XRP), Everipedia (IQ), Loopring ERC-20 (LRC), Maker ERC-20 (MKR), the Status of the ERC-20 (SNT), Ankr Network BEP2 (ANKR), OmiseGO ERC-20 (OMG), ^ american English ERC-20 (^american English), Polymath ERC-20 (POLY), Populous ERC-20 (PPT), Pundi X ERC-20 (NPXS), Parser ERC-20 (REP), Revain ERC-20 (R), Binance ERC20 (BNB-ERC20), Gifto BEP2 (GTO).

Exchange of cryptocurrency

The “Limitless Crypto Exchange” tab is available for a quick transition to an unlimited exchange in 200 digital currencies — 10,000 currency pairs.

How do I update TkeySpace to version 1.3.0?

  1. Go to Google Play on your device — My apps and games — find TkeySpace in the list of apps — click Update.
  2. Go to Google Play on your device-write TkeySpace in the search — click on the app icon — Update.
After the update, you will need to restore your wallet.
submitted by tkeycoin to Tkeycoin_Official [link] [comments]

Questions about Bitcoin reorganization process logic with a rev*.dat file format or byte map.

Hi, I’m currently learning how bitcoin operates by studying the BitcoinCore code and several other bitcoin projects, most of them parsers, and came to a topic of blockchain data storage of blk*.dat and rev*.dat.
While blk*.dat format is more or less documented and the process is described really good (https://learnmeabitcoin.com/guide/blkdat) most of the resources are lacking detailed descriptions of rev*.dat file format and how the process of handling blockchain reorganization (block undo) works. Some Parsers (https://github.com/citp/BlockSci) have rules not to parse new blocks before a certain amount of confirmations so they do not need to deal with the issues of reorganization.
Right now I’m very interested in the logic of blockchain reorganization and found some descriptions:https://en.bitcoin.it/wiki/Bitcoin_Core_0.11_(ch_2):_Data_Storage#Raw_undo_data_.28rev.2A.dat.29:Data_Storage#Raw_undo_data.28rev.2A.dat.29) And an awesome post reply by Pieter Wuille: https://bitcoin.stackexchange.com/questions/57978/file-format-rev-dat I even tried to visualize that answer in a picture: https://prnt.sc/s4ile4
The problem is that all those explanations are dated because of the update (https://github.com/bitcoin/bitcoin/pull/10195) that replaced CTxInUndo class with Coin class (https://github.com/bitcoin/bitcoin/commit/cb2c7fdac2dc74368ed24ae4717ed72178956b92 )
I know that code is the best documentation, but I still find it hard to read and understand, so I’m asking for help to answer these questions:
Apart from learning how everything works, I’m also interested in these topics because they say that it’s possible to get blockstasts faster using rev*.dat files (https://github.com/bitcoin/bitcoin/pull/14802) and I want to properly picture the whole processes with the rev*.dat files.
submitted by cyberwarboy to BitcoinTechnology [link] [comments]

#ShowMeEasyFeedbackToken - #ShowMeEFT_08

#ShowMeEasyFeedbackToken - #ShowMeEFT_08

#ShowMeEFT_08 10 products that will impact on the supply and demand of “EFT”
🛒 #ShowMeEFT_08 10 products that will impact on the supply and demand of “EFT”
💡 Product 3 of 4 for consumers: Use of EFTs on the EasyFeedback Token debit card
The EasyFeedback Token can be used directly through our debit card (in PolisPay) along with the cryptocurrencies that are already available: Bitcoin (BTC), Bitgreen (BITG), ColossusXT (COLX), Dash (DASH), DigiByte (DGB), Divi (DIVI), Ethereum (ETH), GroestlCoin (GRS), Litecoin (LTC), Polis (POLIS) y Telos (TELOS). .
We are working so that EFT can be used on other cards such as Wirex or Minexpay.
For more information:
https://easyfeedbacktoken.io/en/10-products-that-will-impact-on-the-supply-and-demand-of-eft/
#Blockchain #Tokensale #IEO #EFT #Crypto #fintech #EasyFeedback #Wallet
submitted by EasyFeedback to u/EasyFeedback [link] [comments]

Hup Bitcoin #47 met MARTIJN WISMEIJER over Bitcoin ATM's ... ¿Qué es DigiByte? (Subtitulado en español) Bryan's Bitcoin Bytes - YouTube ¿Cómo empezar a usar bitcoin? (BTCenEspañol) - YouTube Byte 2 - Episode 8  Should I Buy Bitcoin? (w/Tony Klah ...

For example, Bitcoin Core reports this transaction as having a vsize of 141 vbytes. Misconceptions. Possibly because of the vbytes metric, it is a common misconception that segwit somehow makes transactions much smaller—but this is incorrect. A 300-byte transaction is 300 bytes on-disk and over-the-wire. Each bitcoin (1 BTC) can have a fractional part of up to 8 digits so 1 bitcoin can be divided into 100 000 000 units. Each of these bitcoin units (0.00000001 BTC) is called a satoshi. A satoshi is the smallest unit in a bitcoin. This unit is named after Satoshi Nakamoto – the alias of the bitcoin creator. Digital money that’s instant, private, and free from bank fees. Download our official wallet app and start using Bitcoin today. Read news, start mining, and buy BTC or BCH. Individuals, businesses, developers: learn from our simple Bitcoin guides. How Bitcoin works, what is Bitcoin, what is blockchain, how to buy Bitcoin, what is Bitcoin mining and more. IMPORTANT DISCLAIMER: All content provided herein our website, hyperlinked sites, associated applications, forums, blogs, social media accounts and other platforms (“Site”) is for your general information only, procured from third party sources. We make no warranties of any kind in relation to our content, including but not limited to accuracy and updatedness.

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Hup Bitcoin #47 met MARTIJN WISMEIJER over Bitcoin ATM's ...

DigiByte (DGB) es una red de pago descentralizada y activo digital de rápido crecimiento, inspirada en Bitcoin. DigiByte le permite mover dinero a través de Internet de manera similar a PayPal y ... Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. This video shows how to buy Bitcoin from a General Bytes Bitcoin ATM Machine. **VIDEO ACTUALIZADO en 2019** 👉 https://youtu.be/CQUBAdsfOZ4 En este nuevo video aprenderás a como comenzar a usar bitcoin con la billetera Coinomi. ... Subscribe for more things! http://www.youtube.com/user/myharto?sub_confirmation=1 Also learn more here: http://www.reddit.com/r/BitcoinBeginners/ TUESDAY: Mi...

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