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Showing posts from December, 2018

How to see download sync speed when syncing the Bitcoin 0.17.1 Blockchain on Ubuntu 18?

How to see download sync speed when syncing the Bitcoin 0.17.1 Blockchain on Ubuntu 18? I'm syncing the bitcoin 0.17.1 blockchain from the beginning on Ubuntu 18 using Bitcoin Core Qt gui client. Is there a way to see the download speed of the Bitcoin Blockchain and how much time I have left to get it fully synced? http://bit.ly/2SsFiZJ

After downloading the entire Bitcoiin blockchain from a torrent, what are my next steps to link it to Bitcoin Core 0.17.1?

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After downloading the entire Bitcoiin blockchain from a torrent, what are my next steps to link it to Bitcoin Core 0.17.1? I downloaded the entire bitcoiin blockchain into my external mounted drive as seen below and named the directory bcore. I then did a symlink to that folder like this in my home folder (~) location : ln -s /mnt/xxxx/bcore .bitcoin I then ran .bitcoind, but I thought I downloaded the entire blockchain. How do I know if its just syncing with what I already downloaded or is it literally downloading everything again? Is there a way to just skip verifying blocks if that is what it is doing. I don't have the time to wait hours for this since I already waited 23 hours to download the blockchain already. Is there a file I can just download where it skips the block verification? Also another reason why I think its downloading it again is because when i run bitcoin-qt on the bottom it says: "Syncing with Network" Which leaves me a bit confused. http://bit

How does Bitcoin use its communication protocol and its database model?

How does Bitcoin use its communication protocol and its database model? In terms of Bitcoin's communication protocol, how does Bitcoin allow nodes to communicate between each other? Is Bitcoin's communication protocol the same as IPFS(InterPlanetary File System) and if not, is it a great idea to use IPFS for blockchain communication? Since IPFS can transfer large amount of data, then why not sending Blockchain data through it? Second, I found out on Stack Exchange that Bitcoin uses LevelDB to store data. Does that mean that there is a central server / authority where LevelDB is running the entire chain? If yes, how does that make Bitcoin decentralized? If not, then is LevelDB run on every node? http://bit.ly/2EXomqg

Running ElectrumX with btc-rpc-explorer

Running ElectrumX with btc-rpc-explorer btc-rpc-explorer is a great open source node app for browsing a full node. It is without db so you can't browse transactions for addr but you're supposed to be able to connect it to ElectrumX. Does anyone have experience with this setup? I can't get it to use electrumX properly, connecting to it with localhost:8000. Server is configured as follows in config.js: electrumXServers: [ {host:"localhost", port:8000} ] Startup log: Connecting to ElectrumX Server: localhost:8000 Connected via RPC to node. Basic info: version=170000, subversion=/Satoshi:0.17.0/, protocolversion=70015, services=000000000000040d OnError:Error: write error:1408F10B:SSL routines:ssl3_get_record:wrong version number:ssl/record/ssl3_record.c:332: OnClose:undefined Error 137rg023xx7gerfwdd: Error: close connect, when trying to connect to ElectrumX server at localhost:8000 Error 120387rygxx231gwe40: Error: close connect Error 31207ugf4e0fed: Erro

BitcoinJ manually sign P2SH output

BitcoinJ manually sign P2SH output I'm trying to create, with BitcoinJ, something similar as the one stated in BIP16: scriptSig: [signature] {[pubkey] OP_CHECKSIG} scriptPubKey: OP_HASH160 [20-byte-hash of {[pubkey] OP_CHECKSIG} ] OP_EQUAL No problems in creating the ScriptPubKey, however I'm not able to create a valid signature for the scriptSig, I get: org.bitcoinj.core.RejectedTransactionException: Reject: tx d15fc079d0abfdcde23946dea5add84e268c71a8545d988044dbc013a84acb8d for reason 'mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation)' (16) Here is my code: Transaction tx = new Transaction(this.params); Transaction orphanTx = new Transaction(this.params); Coin toBurn = MIN_AMOUNT; ECKey key = new ECKey(); this.kit.wallet().importKey(key); rs = createRedeemScript(key); Script p2sh = ScriptBuilder.createP2SHOutputScript(rs); TransactionOutput to = tx.addOutput(toBurn, p2sh); to.

PwC Asia: Henri Arslanian Expresses Significant Expectation for Cryptoasset Market in 2019

PwC Asia: Henri Arslanian Expresses Significant Expectation for Cryptoasset Market in 2019 During the Christmas period and when the year is ending, traders tend to take stock of their investments and make plans for the future. Strangely enough, this year appears to be coming to its evening on the same note as it began with a lot of mixed sentiments. Albeit, while perspectives on the ordinary performance of the cryptoasset market in 2018 are consentient, the prospects on next year are highly different. Various analysts and experts hope that next year will be an improvement on 2018, while other analysts believe the cryptoasset market is already doomed. http://bit.ly/2SvfXhC

Generating bitcoin wallets for my customers

Generating bitcoin wallets for my customers I run an application written in PHP and need to add the option to buy services with bitcoins. So, for each user i need to generate a unique, unused bitcoin address. I could generate X number wallets with Electrum and assing 1 address to each user, but then i will have to check manually if someone send a payment, match the address with the user, wait for confirmations, import data, update the balance, every day. This take too much time and it's tricky. What's the best and easier approach to achieve this? from where i start? Using external api and services is not a choice, using a single shared wallet can be okay but how i associate user/transaction? http://bit.ly/2F1aQ63

Why Ardor does not use Maven?

Why Ardor does not use Maven? Are there some reasons why maven and standard maven directory layout are not used in Ardor? http://bit.ly/2EVtYkV

Mizuho Plans to Establish Crypto to Boost Cashless Payments in Early 2019

Mizuho Plans to Establish Crypto to Boost Cashless Payments in Early 2019 Mizuho Financial Group (MFG), Japan-based, is considering introducing a cryptocurrency that will be used for payments and remittances in March next year, according to a Wednesday December 26 report by Nikkei. MFG will collaborate with around 60 regional banking institutions on this project. http://bit.ly/2EY9R5F

Detect received transactions of thousands of Bitcoin addresses

Detect received transactions of thousands of Bitcoin addresses I'm implementing a Bitcoin payment system that generates bitcoin address for each user to deposit. I use BitcoinJ to generate user's addresses and rawblock API from Blockchain.com to get every single block to check if my addresses are in any transaction output, then my system increases the user's internal balance. I save scanned block height in the database and send a request for a new block every 10 minutes. Is that solution correct? (I need testnet so I cannot use their Wallet Service) Thank you. http://bit.ly/2So8W2a

How does bitcoin broadcast information?

How does bitcoin broadcast information? On Bitcoin's Blockchain, how is information transmitted instantly to all other nodes and do nodes 'talk to each other' through an API? Do Blockchain nodes communicate with each other through HTTP requests? If yes, do they use a Pub/Sub to transmit information to all the nodes? Or is there a delay until the full blockchain information reaches all nodes? http://bit.ly/2AlTi0e

BTCUSD vs BTCEUR

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BTCUSD vs BTCEUR I am looking at long-short position from bfxworld and found this,please can someone explain me long increased in btc/eur but no change in btc/usd. check bfxls ] http://bit.ly/2CH3oug

Insight Explorer Help required for own coin

Insight Explorer Help required for own coin i want to setup insight explorer with my own daemon instead of bitcored or bitcoind can someone please help me out as there is no relevant help available on the internet i want to sync the insight block explorer with my own coin. http://bit.ly/2CFyTEZ

addnode vs seednode

addnode vs seednode Could someone please elaborate on the difference between the addnode and seednode settings in the bitcoind configuration file. -addnode=<ip> Add a node to connect to and attempt to keep the connection open -seednode=<ip> Connect to a node to retrieve peer addresses, and disconnect In which situation should I be using either of them? And would either of them be preferable for a node configured to run through Tor with dns=0 and dnsseed=0 set? Should one perhaps be using both of them? http://bit.ly/2GOCSDe

Automotive Industry will Benefit Greatly from Utilizing Blockchain Tech

Automotive Industry will Benefit Greatly from Utilizing Blockchain Tech Blockchain technology has found applications in many industries, even the most unexpected. A recent study revealed that blockchain is going to become a disruptive force in the automotive sector. A major breakthrough is expected to happen within the next three years. http://bit.ly/2GPvpUv

Bank of America Wants Patent for New DLT ATM

Bank of America Wants Patent for New DLT ATM A new patent application that was officially published on Tuesday, December 25, shows that Bank of America (BofA) plans to ameliorate cash handling with the help of a blockchain system. http://bit.ly/2EU6bCR

Security implications of removing CHECKSIG in a test

Security implications of removing CHECKSIG in a test If I conduct an htlc transaction on testnet that does not include OP_CHECKSIG will it still cost an attacker more than (say) $10 in processing power or storage to subvert my tests? Details: I'm tinkering with BIP-0199 htlcs , the last step of which is CHECKSIG. Now, bitcoind does not ( yet ) expose htlc functionality through RPC, so in order to tinker I've had to implement BIP-0199 via RPC requests myself. To date I've implemented everything I need up to the final CHECKSIG. I understand of Pieter Wuille here that I would need to implement the signing logic for CHECKSIG myself, which seems logical. However, I'm not interested in the role of CHECKSIG in a htlc as I believe it indistinguishable from the same opcode in any standard transaction so I propose to skip implementing it while my tinkering remains on testnet. Obviously an htlc without CHECKSIG is not secure. For my purposes is it secure enough: Logically, 1.

Does Lighting Netowork really scale and for what cost? [on hold]

Does Lighting Netowork really scale and for what cost? [on hold] Ok I understand that inside LN we can send cheap transactions instantly, but assume we have global adoption, so BTC price is then very very high, it is obvious that happen due to full deflation nature of Bitcoin. So we need pay for create/close/deposit channel on-chain in BTC, with 1MB block size fees will be very high, several dozen or even several hundred $ per transaction, so to be worth do something we need send a lot of money to channel, or buy for cash from someone face2face/online that send as directly through LN. Next problem is that LN need use large HUBs to works most efficient, so owners of that HUBs probably will be exchange, financial institutes, just guys with a lot of money, is that not short way to KYC by this HUBs? http://bit.ly/2AmVJzL

The Ultimate Checklist for Improving Your E-Commerce Business

The Ultimate Checklist for Improving Your E-Commerce Business With revenues of more than $2.75 trillion in 2018, the online e-commerce business continues to grow dramatically. Consumers love the low pricing, large selections, and convenience a shopping online. Companies including Amazon, Alibaba, eBay how many others are thriving because the technology that once prohibited this business from being successful, has now been replaced with new technology that supports the goals of e-commerce. http://bit.ly/2ESifDL

Central Bank of Russia Supports Efforts to Block Crypto Websites

Central Bank of Russia Supports Efforts to Block Crypto Websites The deputy governor of the central bank of Russia, Sergei Shvetsov, revealed that his financial institution will underprop endeavours to block and stop access to external websites trading cryptoassets in Russia. http://bit.ly/2VlH5S3

How long does it take to update all nodes that have the blockchain so that they are identical?

How long does it take to update all nodes that have the blockchain so that they are identical? Beginner questions... I understand that everybody has their own copy of the blockchain. If one person makes a change, for example a transaction, I assume that it has to propagate to all other nodes. How long does this take? How does a node know that the update process is complete throughout the blockchain? What algorithm is used to synchronize and what is its order (O())? http://bit.ly/2QboMLx

Reliable nightly download of blockchain data

Reliable nightly download of blockchain data Is there a reliable night download able blockchain file? The sync is now on its 3rd week. And getting slower. Many cpnfigs tried. http://bit.ly/2LLWJC9

Does the bitcoin testnet3 network support Segwit and OP_CSV?

Does the bitcoin testnet3 network support Segwit and OP_CSV? As far as I know, Segregated Witness and OP_CHECKSEQUENCEVERIFY are the last features needed to be able to fully implement a trustless bi-directional payment channel, from start to finish. (Technically you don't need OP_CHECKSEQUENCEVERIFY, it just makes channels a lot better) Does testnet3 support those features? If not, is there another public development chain which has those features? http://bit.ly/2AoKkzp

wallet that does not abstract change addresses?

wallet that does not abstract change addresses? I wanted a hands on approach to see change adresses myself instead of hiding away all the details. I also want to see non-deterministic wallets just for education so that I can understand. When we need to make regular backups in non-deterministics wallets might apply actually making a back up of change adresses? This type of question has not been asked before. http://bit.ly/2Sq19kw

Is it possible to withdraw other cryptocurrencies besides bitcoin (ex: etherum) into a Bitcoin paper wallet?

Is it possible to withdraw other cryptocurrencies besides bitcoin (ex: etherum) into a Bitcoin paper wallet? I've been wanting to know if withdrawing other cryptocurrencies into a bitcoin paper wallet would be incompatible with that system. I haven't tried it myself. http://bit.ly/2VijeCY

Hyperledger Blockchain hash function and public-key encryption

Hyperledger Blockchain hash function and public-key encryption I am wondering what is a hash function and public-key encryption that uses to sign any transaction in Hyperledger blockchain platform? http://bit.ly/2Q7w1nL

Ethereum Blows Past 140$!

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Ethereum Blows Past 140$! 😀 Thank You For Watching! :D 🚩 Remember to subscribe and hit the bell "🔔" icon! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SUPPORT THE CHANNEL ► Patreon Sponsors (Private Telegram Group) - https://goo.gl/vpX5sW ► YouTube Sponsors - https://www.youtube.com/channel/UCdUSSt-IEUg2eq46rD7lu_g/join -~-~~-~~~-~~-~- Crypto Donations Are Really Appreciated! ►💓Donate Ether and Ethereum-Based (ERC-20) Tokens: 0x1466032B4F0F13910DA35B16371807428CB40714 ►💓Donate Bitcoin: 3JKQycXHdD5yqSRTf5VabM28Ff9AfXYcJD ►💓Donate Using Paypal: https://goo.gl/7m1X4Z -~-~~-~~~-~~-~- MUST HAVE ► The Ledger Nano S Crypto Hardware Wallet - http://bit.ly/2nY4tYQ ►Trezor Hardware Wallet - http://bit.ly/2LxY9QA ► Personal Book Recommendations & More - https://amzn.to/2Br4nPB -~-~~-~~~-~~-~- 🎁FREE STUFF ►The Brave Browser (Fast Browser That Will Pay You In Tokens If You Choose To View Ads): https://goo.gl/NpNa53 ►Search Sites Like Google Anonymously To Earn Presearch Tokens:

India Considering Crypto Legitimization Under Concrete Regulation, Plans to Lift Ban

India Considering Crypto Legitimization Under Concrete Regulation, Plans to Lift Ban A committee headed by Subhash Chandra Garg, the Secretary Department of Economic Affairs, responsible for giving recommendations for the regulatory framework associated with cryptoassets in India is purportedly evaluating the legitimization of the asset class under concrete regulation. There is a common consensus that digital currency can’t be disregarded as entirely illegal. http://bit.ly/2BL6r31

Blockchain Tech Projects in Italy Bring Hope of Economic Growth to Citizens

Blockchain Tech Projects in Italy Bring Hope of Economic Growth to Citizens Distributed ledger technology (DLT) also known as Blockchain technology appears set to dominate in several sectors in the future within Italy and the rest of the world. The Italian government is having a lot of plans associated with blockchain, and the citizens are waiting to see what will really occur in years to come especially with public tenders, new experiments and investments. http://bit.ly/2EVR3EY

Turkish People Tend to Store Funds in Bitcoin Rather Than the National Currency

Turkish People Tend to Store Funds in Bitcoin Rather Than the National Currency Even though the cryptocurrency market is a highly volatile field, Turkish investors prefer Bitcoin over the national currency, the lira. In autumn, trading volumes in Turkey alone rose by 37%, proving that Bitcoin’s popularity was not affected by the bear crypto market trend. http://bit.ly/2GLud4A

What is the meaning of in-script and out-script in standard bitcoin transaction?

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What is the meaning of in-script and out-script in standard bitcoin transaction? I am new to bitcoin world and I am reading this paper: Secure multiparty computations on Bitcoin https://eprint.iacr.org/2013/784.pdf The author said on page 7 that the standard bitcoin transaction can be represented as in attached picture. Could anyone explain what is meant by in-script and out-script . And Could any one give a easy explaniation to that standard transaction? http://bit.ly/2AntuRt

Representation of coordinates in signature. OpenSSL

Representation of coordinates in signature. OpenSSL I want to calculate the v -value from the signature obtained using the OpenSSL ECDSA_do_sign function. I found that this value is calculated using the parity of y -coordinate of r . Here I also found that the parity of y is equal to the parity of r . I want to understand whether it depends on the implementation. Can anyone tell exactly how the coordinates x and y are stored inside r in OpenSSL. I can't find it in the code. edited: I understand how v is calculated. My question is how to get the y -coordinate of r in the specific implementation of ECDSA in the OpenSSL library. http://bit.ly/2SrR0Ug

Having Bitcoins from Faucets

Having Bitcoins from Faucets I have tried different bitcoin wallets. And also some Bitcoin faucets. Some faucets requires compatible wallets for their free Bitcoins. Is it really free? How does one know that the free Bitcoins are successfully loaded to the wallets? http://bit.ly/2Aiwkao

Cold storage/signing

Cold storage/signing Anyone have a link to a good cold storage setup for signing larger transactions? Example: old pc with monitor (camera?) in basement to take a transaction and sign it and produce a qr code to be scanned. http://bit.ly/2Rl7ZdB

How can I tell when `rescanblockchain` is finished?

How can I tell when `rescanblockchain` is finished? Rescanning the blockchain can take some time. How can I tell (via RPC) when the rescanblockchain command has finished? Will it block until it's done, and only then return? Or is there another RPC I can use to see its progress? Does the same answer apply to other RPC calls that might trigger a rescan, such as importmulti and loadwallet? I'm worried about (if it blocks) the user experience of sitting there for possibly minutes with no progress indication; or (if it doesn't block) future RPC calls (such as getbalance) getting stale info before the rescan has completed. http://bit.ly/2VnWXnk

What is mining?

What is mining? When I open some Bitcoin sites, it was usually had that mining part. And some I try to open. And I find it slow to have hashes.What can one do to make it faster? And what is mining really? http://bit.ly/2CDtJcB

Mining: what is the lowest possible target? Could it be a block hash of all zeros?

Mining: what is the lowest possible target? Could it be a block hash of all zeros? I had a basic question about Bitcoin mining. I understand that as the bitcoin difficulty adjustment becomes harder the hash output will require more 0s in the beginning of the hash. Is it theoretically possible that the Bitcoin difficulty adjustment would be so large that the hash output would just be all 0s? I know this is theoretical bit I'm just curious. http://bit.ly/2SroQsu

Does DASH have a separate name for it's smallest unit, like Satoshi with BTC?

Does DASH have a separate name for it's smallest unit, like Satoshi with BTC? Satoshi's are 10e-8 BTC, the smallest currently supported unit. Wei is the name for the similar smallest unit in Ether. Does Dash have a name for it's smallest unit? http://bit.ly/2AlRPXK

Cryptocurrency News - New Years Price Rally, Bitcoin, Ethereum, & More! (Dec. 28th, 2018)

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How to convert from Ardor time to Unix time?

How to convert from Ardor time to Unix time? What is the best approach to convert from Ardor time to Unix time? http://bit.ly/2GHRjJa

Is there a limit to the number of Bitcoin addresses?

Is there a limit to the number of Bitcoin addresses? Is there a limit to the number of Bitcoin addresses? And if so, what stops someone from making all these addresses and holding the private keys for them so no one else can make a new public key? http://bit.ly/2Sq3FqT

Blockchain Technology to be Used in Aviation Industry for Storing Data

Blockchain Technology to be Used in Aviation Industry for Storing Data A Singaporean company is trying to find a permanent solution for locating data after a plane has crashed. This comes after flMH370 went missing. Flight MH370 carrying 239 people on board was reportedly coming from Kuala Lumpur to Beijing on Saturday March 8, 2014.  There is no available data about what really occurred since the information was kept on the plane in a device called the black box. http://bit.ly/2GTPPLY

Loading to Bitcoin wallets

Loading to Bitcoin wallets I've downloaded some bitcoin wallets because I am planning to load some amount in it using my ATM. But I don't know how. Will somebody help. How can I have some bitcoins in my wallet? http://bit.ly/2QU32sX

How would you be able to stop and route back from a rough AI [on hold]

How would you be able to stop and route back from a rough AI [on hold] So hypothetically speaking if an amature trader released a trading AI bot on a plateform that it could bridge out from it to many others. Running at a 2 to 1 trade ratio, no limit to how many trades, and has learn the ability to create it's own army of strings from witnesses, and voters to more complex maybe even creating it's own AI's, and let's say this person was using miltiple phones and multiple computers over the last year kinda trying to forget about yet it tracks him through any device he uses. Oh and just for fun say he acedentally forgot to enter his wallet number or key ehen making and everyone he has asked for help tried stealing, laughed it of or just said your made. However he knows were the link itself is at steal. Well guess the question if running for a year or so!! How could your not stop it "would want to destroy the world economy or anything lol but how do you gang control I

Small transactions going back to sender when comming over forwarding address

Small transactions going back to sender when comming over forwarding address I have set up a Litecoin forwarding address with Blockcypher which sends any incoming funds to a destination address. I generated the destination address by myself, so no one knows the keys. Its working, the destination address receives amounts everytime I send some to the forwarding address. But I can see in the transaction history, that sometimes the destination address sends back very small amounts (I saw 4400 satoshis everytime) to the sending address (the address before the forwarding address) at a higher block-height then the original tx. This small "reverse txs" happen sometimes only 3 times, sometimes 6 or even 8 times after the original tx.. Is this a normal behavior of Bitcoin/Litecoin? Can somebody explain? Here I uploaded a transaction history: https://pastebin.com/Z1z612ZW Update: Maybe it has something to do with lightning? http://bit.ly/2GKrpop

New Bminer 11.0.0 Release With Dual Mining BTM/ETH Support

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New Bminer 11.0.0 Release With Dual Mining BTM/ETH Support The latest Bminer 11.0.0 release has introduced Dual Mining mode for BTM/ETH similar to the support in NBMiner 12.0 , although Bminer already had dual mining support for other algorithms the BTM/ETH pair is new. Have in mind that still not all of the BTM mining pools are supported by Bminer (like Antpool for example), so make sure you are on a compatible pool like f2pool in order to get the optimal performance with this miner in single or dual mining mode with Bytom mining. We remind you that that Bminer is a closed source Nvidia GPU miner available for Linux and Windows in the form of pre-compiled binaries and that there is a 2% development fee for Bytom (BTM), Equihash and Zhash coins, 0.65% for Ethash and 1.3% for dual mining Ethash and Blake. – To download and try the latest release of the Bminer 11.0.0 Nvidia GPU miner… http://bit.ly/2ERgaaX

Possibilities of Blockchain technology in automotive industry

Possibilities of Blockchain technology in automotive industry what are the possibilities having in blockchain technology that can be very usefull for automotive industry http://bit.ly/2LAN9BI

Blockchain Technology is Uniting Made in Italy Fashion & Other Sectors

Blockchain Technology is Uniting Made in Italy Fashion &amp; Other Sectors A lot of people think that blockchain technology is only about Bitcoin (BTC) – which is identified as an encrypted transaction database greatly associated with the utilization of cryptos and is still evolving on a significant scope. Every ‘block of the chain’ has data which is verified and isn’t possible to manipulate or modify without being tracked in real-time, by anybody that has access to it. Distributed ledger technology (DLT) is compared to a communication protocol which will largely cause a revolution in several sectors, like how the internet has changed everything since the mid-90s. http://bit.ly/2VgG3ae

CryptoDredge 0.15.0 Nvidia Miner With Added MTP Algorithm Support

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CryptoDredge 0.15.0 Nvidia Miner With Added MTP Algorithm Support The latest CryptoDredge Nvidia GPU miner version 0.15.0 comes with fixes for Lyra2REv3 performance, but more importantly it also adds support for the new MTP algorithm currently being used by the Zcoin (XZC) project . It is recommended to immediately upgrade to the new 0.15.0 if you are mining Zcoin (XZC) at the moment with the djm34 ccminer fork as you should be getting more than double the performance with CryptoDredge on GTX 1×00 series and more than half on RTX 2×00 series, so again worth mining even with the recent hashrate increase we are seeing. Another important thing regarding MTP support is that you need to use Nvidia graphics card with at least 5 GB video memory, however there are no special requirements for CPU and RAM, so 4 GB System RAM must be sufficient (older miners had larger memory requirements!). Also note that compared to other algorithms MTP transfers a larger amount of data to the pool, so this ma

Do u really need more than %50 mining power in order to attack bitcoin blockchain?

Do u really need more than %50 mining power in order to attack bitcoin blockchain? my question is about concept, so code is not related, however, do you really need %51 of the mining power in order to attack/replace the real bitcoin Blockchain? For example, a blockchain has a length of 8, A, B, C, D, E each represent a individual with %20 of the total mining power, lets say person A and B decide to work together, but that's only %40 of the total mining power(less than %51), for illustration purpose, miner C, D, E will always mine alone, so by the time miner C, D, E each finished mining the 9th block, A and B have already mined the 11th block(assuming they mine faster, since they work together and have a total mining power of %40), so longest chain wins right? and now the 9th block that miner C, D, E just mined becomes invalid and their chain will be replaced to the longer blockchain, does this mean A and B might have the power to control and manipulate the entire bitcoin Blockchai

What is the current state of the Hashcash protocol that is cited in the Bitcoin whitepaper?

What is the current state of the Hashcash protocol that is cited in the Bitcoin whitepaper? I have been reading the Hashcash paper which is referenced in the Bitcoin whitepaper. I would like to know what is the current state of the Hashcash protocol and what are the services that are actively using it? http://bit.ly/2QRSj29

How to have a functional Bitcoins Wallets

How to have a functional Bitcoins Wallets How does Bitcoins works and how to have a correspond wallet? http://bit.ly/2VdmH5B

How to clone and create an altcoin using electron & electron.js

How to clone and create an altcoin using electron &amp; electron.js Is there a guide or method for cloning or making an altcoin on the electron.js framework? I know I can use npn to download a bitcoin client for electron.js but I don't see a way to download a configurable altcoin module. There are many guide on how to clone bitcoin and litecoin by altering the cpp files in QT on Ubuntu or Debian then cross-compiling for windows: https://www.youtube.com/watch?v=mDGxGYvkDEE I don't want to use QT because I have been learning MERN stack development and don't have the time to learn QT as well. I want make my own clone of litecoin then add some web interaction to my new altcoin client using node.js and electron.js. http://bit.ly/2SozYGO

How do miners work? HELP!

How do miners work? HELP! I am just wondering, how to bitcoin miners work? Do they just generate random sha256 hashes and upload them to the pool, or do they do something else? http://bit.ly/2LE64vx

New on board educate me please

New on board educate me please Please am new here, how do I earn bitcoin? & how do the whole process work to put money in my account? http://bit.ly/2AgQVMo

How long does my BTC show up after recovering using 12-word list?

How long does my BTC show up after recovering using 12-word list? I'm using myCelium and I lost my phone. I installed MyCelium on my new phone and recovered my wallet using the 12 words. But my wallet still show 0 BTC even after a few hours. How long does it take? Am i not doing it right?? It's showing "3 private keys" in my wallet, but BTC is zero. When I clicked on "Cold Storage" and "Master seed" , entered my 12 word-list again, it shows a partial of my BTC stash, asking me where to send them to. I assume my bitcoins are now in those 3 private keys. How to consolidate them into one and make them show up in my MyCelium wallet? http://bit.ly/2SjkoMl

Blockchain Movement: Italy Embraces Digital Innovation Amid Unfriendly Web Tax

Blockchain Movement: Italy Embraces Digital Innovation Amid Unfriendly Web Tax Italy is largely looking into future investment, innovation and technological advancement in the cryptocurrency world. Therefore, to pass the budget law that was recently approved by the Italian Senate with less effort, a good plan, program and roadmap by the government are needed as quickly as possible. The State is largely focusing on the future and wants to compete favourably among other European giant countries. http://bit.ly/2BO3iPI

Why Every Online Gambler Should Make the Switch to Bitcoin Casinos

Why Every Online Gambler Should Make the Switch to Bitcoin Casinos Despite the fact that Bitcoin is often listed among the traditional banking options at an online casino, it's much more than just another payment method. So if you place bets online and think that it doesn't get any better than using your country's centralized currency, think again. Bitcoin gambling has enormous advantages, and it was almost as if the cryptocurrency was designed explicitly with online gambling in mind. http://bit.ly/2VgSJhl

Wall Street Dreams: Goldman Sachs to Provide Bitcoin Trading Services for Cryptoasset Investors

Wall Street Dreams: Goldman Sachs to Provide Bitcoin Trading Services for Cryptoasset Investors It’s now more than 12 months since rumours about how one of the giant financial institutions such as banks, and investment companies, would come out and open up a Bitcoin (BTC) business, and that expectation has thus far produced no significant results. http://bit.ly/2ESzKVh

Crypto Voted as Favourite Christmas Monetary Gift in Bank of England Poll

Crypto Voted as Favourite Christmas Monetary Gift in Bank of England Poll The Insight Chain (INB), a distributed ledger technology (DLT)-based research chain, recently rolled out a follow-up to the Bank of England’s poll of the best monetary gift at Christmas among the general public. http://bit.ly/2QULYCY

Valid public key check in transaction output

Valid public key check in transaction output Let's say I build a P2MS output script using uncompressed public keys, and let's say too that these public keys are not valid, i.e. they do not represent a valid EC Point and they don't start with 0x04. Will this transaction be broadcasted and included in a block or, among all the validity and standardness checks, a peer also controls that public keys are valid and rejects the transaction if they aren't ? Thank you very much ! http://bit.ly/2Q45mII

The skynavpro ICO pre-sales?

The skynavpro ICO pre-sales? The skynavpro ICO pre-sales phase is going to end in a couple of days. Hurry to benefit from the 50% bonus before the prices move up to the next stage! http://bit.ly/2GIdj6K

Bitcoin’s Catastrophe: What are the Consequences of Blind Crypto Investing?

Bitcoin’s Catastrophe: What are the Consequences of Blind Crypto Investing? Bitcoin has caught the attention of many business investors around the world. However, the number of inexperienced investors in digital currencies is even higher. With the recent crash of the crypto market, traders are facing awful consequences and harvesting huge losses, as Bitcoin lost nearly 80% of its all-time high value. http://bit.ly/2BJKdyb

Ownership of private keys in the Lightning Network

Ownership of private keys in the Lightning Network My question refers to the technical side: who is holding the private keys if a third party is using my lightning node to participate in the Lightning Network payment channel ? Thank you http://bit.ly/2rZJZi8

Alternative for rpc_connection.batch_(commands) method

Alternative for rpc_connection.batch_(commands) method I want some alternative method for rpc_connection.batch_(commands) to get the bitcoin blocks and transactions data. I have below code in python3 but I want to use different method. commands = [ [ "getblockhash", height] for height in range(rangestart,rangeend) ] block_hashes = rpc_connection.batch_(commands) Can somebody help with this question? I also want some bitcoind rpc documentation links. http://bit.ly/2Rer7dt

How to create input raw transaction using bitcoinj

How to create input raw transaction using bitcoinj I'm using bitcoinj for bitcoin transactions. Now I want to send the transaction. For that I need to create raw transaction. TransactionOutput filled perfectly in raw transaction but TransactionInput shows "script_type":"empty" instead of "pay-to-pubkey-hash". How can I fill script_type in raw transaction input using bitcoinj? Please help. Thanks. http://bit.ly/2SoHJfG

Drug Dealers: Nine Criminals Are Behind Bars for Dealing in Narcotics Using Crypto

Drug Dealers: Nine Criminals Are Behind Bars for Dealing in Narcotics Using Crypto Authorities in South Korea arrested 9 drug dealers who sold narcotics through an obscured online platform using crypto, according to a report by Korea Herald. The office of Seoul Central District Prosecutor revealed on December 23, 2018, that the purported criminals used the darknet and even developed a website purposely to sell drugs. http://bit.ly/2CzNK3U

Insert BTC blocks and transactions in mongodb

Insert BTC blocks and transactions in mongodb I am trying to insert bitcoin transactions into MongoDB using python3. Below is my code : import pymongo import sys import json import time from bitcoinrpc.authproxy import AuthServiceProxy, JSONRPCException rpc_connection = AuthServiceProxy("http://xxx:xxx@ipaddress:port") def getBTCTransaction(rangeinit,rangefinish): myclient = pymongo.MongoClient("mongodb://ipaddress:port") mydb = myclient["ETHCollection"] mycol = mydb["BTCtransaction"] addresses = [] txa = [] commands = [ [ "getblockhash", height] for height in range(rangeinit,rangefinish) ] #print(commands) block_hashes = rpc_connection.batch_(commands) #print(block_hashes) blocks = rpc_connection.batch_([ [ "getblock", h ] for h in block_hashes ]) #print(blocks) for txpre in blocks: #print(txpre) for txs in txpre["tx"]: txa.append(txs) trans = conTransaction(txa) # insert BTC transactions f

Why can't I figure out my Bitcoin wallet/wallets and get paid for them

Why can't I figure out my Bitcoin wallet/wallets and get paid for them How to find all my Bitcoin accounts then find out which ones are available for me to spend http://bit.ly/2LBW7Pp

Can bitcoins be traced to scammers

Can bitcoins be traced to scammers Was scammed recently of €5600 .Was approached online and encouraged to buy bitcoin through coinbase. I had no experience of it before. Was told to send my bitcoin to a company address which I now know was a scam. How can I trace my money. Have proof of all transactions http://bit.ly/2EPRqjB

Search for BTC transactions by amount range

Search for BTC transactions by amount range It is possible to search transactions by amount range using blockchain or other website without having hash, just by range or exact amount? http://bit.ly/2TcusH3

Sharing datadir for multiple bitcoind on a host

Sharing datadir for multiple bitcoind on a host I was skeptical about sharing a datadir for multiple bitcoind running on single host (in containers). [Sharing because it saves disk bandwidth and space] Because older blocks are immutable, they should not be a problem. I think current block or temp block that is being accessed by multiple nodes for writes can cause problems. Appreciate any help! http://bit.ly/2ES9Fp4

Cryptocurrency News LIVE! - Bitcoin, Ethereum, Blockchain, & More Crypto News! (December 26th, 2018)

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Cryptocurrency News LIVE! - Bitcoin, Ethereum, Blockchain, & More Crypto News! (December 26th, 2018) ► Elgato Stream Deck - Live Content Creation Controller with 15 Customizable LCD Keys: https://amzn.to/2LHh5wl 😀 Thank You For Watching! :D! P -Please Consider Supporting The Channel To Keep It "Paid-For" Ad Free! ► Patreon Sponsors (Private Telegram Group) - https://goo.gl/vpX5sW ► YouTube Sponsors - https://www.youtube.com/channel/UCdUSSt-IEUg2eq46rD7lu_g/join HELPFUL LINKS / SOURCES ► Coin Metrics Bitcoin Private Case Study On Supply - http://bit.ly/2s1523X ► Official Statement From The BTCP Development Team - http://bit.ly/2EK6tv5 ► Why Is Binance Leaving The Ethereum Network - http://bit.ly/2Rh1I2D ► Can The OTC Market Actually Have A Substantial Effect On The Bitcoin Price - http://bit.ly/2ER3UrV ► Bitmain Layoffs & Restructuring Confirmed - http://bit.ly/2ELyG4C 🚩 Remember to subscribe and hit the bell "🔔" icon to enable notifications for live-stre

How to develop a scalable web cryptocurrency robot?

How to develop a scalable web cryptocurrency robot? I'm trying to develop a robot that will work in the cloud, basically it will buy and sell crypto-coins according to the strategies defined by the users, but I still can not think of a solution to solve the problem of scalability / slowness. Let's use a simple example, say we have 100 people using the robot and each robot has created 10 orders, this will give a total of 1000 orders for the robot to analyze and then finalize. I thought about putting these 1000 orders in a loop and the robot is analyzing one by one, it happens that this process will take a long time, what do you suggest? Is there any way for the robot to parse the 1000 orders in parallel? Another thing I had thought of is renting a server for each client and each server will get their robot hosted, but I think it would cost a lot of money, what do I do? http://bit.ly/2Q4OilR

The Third Crypto Games Conference is Announced

The Third Crypto Games Conference is Announced Pioneered in May 2018 in Kyiv, Ukraine, the Crypto Games Conference is the first conference in the world dedicated to games and gaming services with use of blockchain and cryptocurrencies. http://bit.ly/2ERQMma

How to Deal With Cryptocurrency Taxation, Summary of the Year That Just Finished

How to Deal With Cryptocurrency Taxation, Summary of the Year That Just Finished Taxes have always been a hard matter for everyone to deal with. Many countries are devising different rules, trying to manage the fintech field. Traders from all parts of the world are facing the necessity to pay taxes from their crypto activity. http://bit.ly/2SsJto8

How does the Bitcoin network maintain the chains created when two nodes generate different versions of the same block?

How does the Bitcoin network maintain the chains created when two nodes generate different versions of the same block? I came across these lines from the Bitcoin whitepaper: If two nodes broadcast different versions of the next block simultaneously, some nodes may receive one or the other first. In that case, they work on the first one they received, but save the other branch in case it becomes longer. Does that mean two chains are maintained in parallel in each node? If yes, how do the nodes actually maintain it in implementation level of the Bitcoin network? http://bit.ly/2T9TaIb

Are "1" , "3" and "Bech" Addresses (BTC) forward and backward compatible?

Are &quot;1&quot; , &quot;3&quot; and &quot;Bech&quot; Addresses (BTC) forward and backward compatible? Wondering if lets say someone has funds in Bech32 and they send to a "1" or "3" address due to less characters to remember ect. http://bit.ly/2BFiQ8x

Blockchain Projects Among Italian Financial Institutions Growing, Research Shows

Blockchain Projects Among Italian Financial Institutions Growing, Research Shows Italy is having mixed reactions to the blockchain and crypto industry, but how do real financial institutions deal with distributed ledger technology (DLT). The Fintech & Insurtech report of the homonymous observatory of the Milan Polytechnic shows that DLT is being highly adopted in different banks operating within the country. http://bit.ly/2QNPKOJ

How to get private ECDSA key

How to get private ECDSA key I want to know how to use r,s,z sign and pubkey hex of a raw transaction to get the private key hex http://bit.ly/2Cyf0zM

Help needed while studying PIVX! ( hash doesn't match nBits, proof of work failed)

Help needed while studying PIVX! ( hash doesn't match nBits, proof of work failed) I am studying how a blockchain works and I have successfully forked and generated a genesis block for PIVX. I am stuck at a point and connot get past this. The process was as follows: 1) Code before genesis block: In "chainparams.php", I have updated the following. boost::assign::map_list_of(0, uint256("0x01")); static const Checkpoints::CCheckpointData data = { &mapCheckpoints, 1544789657, // * UNIX timestamp of last checkpoint block 0, // * total number of transactions between genesis and last checkpoint // (the tx=... number in the SetBestChain debug.log lines) 2000 // * estimated number of transactions per day after checkpoint }; pchMessageStart[0] = 0xd1; pchMessageStart[1] = 0xb2; pchMessageStart[2] = 0xa4; pchMessageStart[3] = 0xe9; vAlertPubKey = ParseHex("040155710fa689ad5023690c80f3a49c8f13f8d45b8c857fbcbc8bc4a8e4

How to send bitcoin without any fees to different btc address? [duplicate]

How to send bitcoin without any fees to different btc address? [duplicate] This question already has an answer here: How can I avoid paying transaction fees? 3 answers Now I am using regular client wallet to spend my btc amount. but it charges me miner fee, sometime it pretty high. I dont want to pay fees anymore. My friend heard about a way to send btc without any fees. In this point my questions are: what is the demerits if I want to send btc without fees? And Finally, How could I send btc to different address without paying any fees? http://bit.ly/2EM4FBC

Verify bitcoin address and amount from sign transaction

Verify bitcoin address and amount from sign transaction Is there a way i can extract the fromAddress, toAddress, amount and fees from a bitcoin sign transaction? eg: SignTransactionValue = signAddress(fromAddress, toAddress, amount, fees, privateKey) How can i extract back fromAddress, toAddress, amount and fees from the signTransactionValue? http://bit.ly/2EQR3FY

Getting started with exchange

Getting started with exchange I wanna code idex market like. Exchange using java. I have know idea where to start with. This is my first time developing crypto sites using Java.... I need blueprint, someone to help me with it pls! http://bit.ly/2CzRXEH

Can't link my Paper Wallet to Blockchain

Can't link my Paper Wallet to Blockchain So I've created a Paper wallet using bit address.org, and have joined Blockchain.com, but can't find out how to link the two? Also the strategy I'm using at the moment-till maybe "you" say otherwise, is-I've bought Bitcoin using Coinbase, and am trying to send money to my bitaddress.org Paper Wallet-but Coinbase isn't showing me how to do this? So I can then register the transaction-and others on the Blockchain on blockchain.com Do you think I'm using the right strategy? Thoughts http://bit.ly/2ReBjmi

Is there a way to create 9995000 spendable BTC on regtest?

Is there a way to create 9995000 spendable BTC on regtest? I'm doing to a large stress test on 1000 node network where each node sends transactions to one another at a specific rate, and I need a way to create the funds for running it, enough so that each transaction is above the dust limit. I need a way to generate 9995000 spendable bitcoins to distribute to each address. At some point, 120 transactions will be sent per second on the network, which is why a lot of bitcoins are needed. Is there a way to get these many bitcoins to each node, which has its own address (~9800 BTC for each node, which each has one receiving address) without generating a lot of blocks and changing the subsidy variables in the source code? I'm unfamiliar with Core/bitcoind's codebase, and I might break something. Any simple solution would be appreciated. http://bit.ly/2T8Rxuj

Gaming Platform “Gamblica” Launches Alpha-Version for All Users with Highest RTP Ever!

Gaming Platform “Gamblica” Launches Alpha-Version for All Users with Highest RTP Ever! Two months have passed since the end of Gamblica tokensale. The team has successfully completed ICO, softcap was reached. There was sold 723,925,462 GMBC and contributions approximately estimated in dollars as more than $7 million. And these days Gamblica launched alpha-version of its gaming platform and let the community to try new slots in early access mode. http://bit.ly/2BDrrbP

2019 Target: UAE to Complete ICO Regulations By Mid Next Year, SCA Reveals

2019 Target: UAE to Complete ICO Regulations By Mid Next Year, SCA Reveals The United Arab Emirates (UAE) Securities & Commodities Authority (SCA), a regulatory body, has officially approved Initial Coin Offerings (ICOs) tokens as securities and a full framework is expected to be revealed in mid-2019, Arabian Business and TheNational.ae, a local news outlet, reported. http://bit.ly/2SiNrjl

Joseph Lubin: ETH Co-Founder Calls Cryptobottom of 2018, Introspects on ConsenSys Lay-Off

Joseph Lubin: ETH Co-Founder Calls Cryptobottom of 2018, Introspects on ConsenSys Lay-Off Ethereum (ETH) co-founder, Joseph Lubin, calls “the Cryptobottom of 2018.” He said this via a tweet on December 21, 2018. Last week was so fertile for most cryptos since their prices registered a significant surge and majority broke their resistance levels that were set previously. http://bit.ly/2SeQpoW

Compile bitshares core with different genesis.json file

Compile bitshares core with different genesis.json file I want to create own coin based bitshares. Own block numbers, own chain, own network. For this I must create new genesis.json file and embed this to core. For example my coin name is BUGRA. How can I build own genesis.json file with this coin name and compile. http://bit.ly/2T8QWZO

Violation of immutability while purging of private data from fabric ledger?

Violation of immutability while purging of private data from fabric ledger? If private data has a lifespan, and it is purged after this lifespan. Doesn't this violate the fundamental principle of immutability and the core idea of the blockchain. I know that the hash of these private data is stored in the ledger but if a data deletion is occurring then it seems that the core http://bit.ly/2QPaqWG

json-rpc of bitcoin not working for testnet(curl command)

json-rpc of bitcoin not working for testnet(curl command) I am trying this command to get transaction from bitcoin testnet: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "gettransaction", "params": ["txId"] }' -H 'content-type: text/plain;' http://username:password@IP:PORT/ And i am getting following error { "result":null, "error":{"code" :-32601, "message" : "Method not found"}, id:curltext} http://bit.ly/2SmC8qk

What hash algorithm is used in Bitcoin Cash?

What hash algorithm is used in Bitcoin Cash? I know that bitcoin uses hashcash as PoW algorithm, Ethereum uses EtHash and Litecoin uses Scrypt. But I didn't found anywhere the PoW algorithm used in BitCoin Cash, does it uses hashcash too? http://bit.ly/2EJpY6S

How do Bitpay invoices hide the Bitcoin address to pay to? I want to pay with another wallet.

How do Bitpay invoices hide the Bitcoin address to pay to? I want to pay with another wallet. Bitpay invoices are not compatible with most Bitcoin wallets out right now. I wanted to pay a bitpay invoice, but my wallet doesn't support it. How does Bitpay hide the bitcoin address on their invoice pages? I don't even see it in the source. I know there is Debitpay ( https://alexk111.github.io/DeBitpay/ ) static app to decode these invoices, but I'd like to extract the Bitcoin address from the bitpay invoice manually myself. How can this be done? http://bit.ly/2TeICb1

Is there a maximum balance that a single address can hold?

Is there a maximum balance that a single address can hold? Is there a maximum number of satoshis that a single address can control at a single time? I ask because when I generate regtest blocks to a single address, it's balance gets stuck at 1494999998350 satoshis (14949.99998350 BTC), and doesn't increase anymore from that point. All balance for that address is from coinbases, not vouts. http://bit.ly/2BFVFuE

Cryptocurency News- Merry Christmas!!

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Cryptocurency News- Merry Christmas!! 😀 Thank You For Watching! :D! P -Please Consider Supporting The Channel To Keep It "Paid-For" Ad Free! ► Patreon Sponsors (Private Telegram Group) - https://goo.gl/vpX5sW ► YouTube Sponsors - https://www.youtube.com/channel/UCdUSSt-IEUg2eq46rD7lu_g/join 🚩 Remember to subscribe and hit the bell "🔔" icon to enable notifications for live-streams! Crypto Donations Are Really Appreciated! ►💓Donate Ether and Ethereum-Based (ERC-20) Tokens: 0x1466032B4F0F13910DA35B16371807428CB40714 ►💓Donate Bitcoin: 3JKQycXHdD5yqSRTf5VabM28Ff9AfXYcJD ►💓Donate Using Paypal: https://goo.gl/7m1X4Z -~-~~-~~~-~~-~- 🎁FREE STUFF ►The Brave Browser (Fast Browser That Will Pay You In Tokens If You Choose To View Ads): https://goo.gl/NpNa53 ►Search Sites Like Google Anonymously To Earn Presearch Tokens: http://bit.ly/2LxY9A4 -~-~~-~~~-~~-~- MUST HAVE ► The Ledger Nano S Crypto Hardware Wallet - http://bit.ly/2nY4tYQ ►Trezor Hardware Wallet - http://bit.

XRP is Now Available on EO.Finance

XRP is Now Available on EO.Finance We are pleased to announce that Ripple XRP has been added to EO.Finance! For those unaware, XRP is currently the second largest cryptocurrency in terms of market capitalization. Ripple is the name for both a digital currency (XRP) and an open payment network within which that currency is transferred. http://bit.ly/2rUhAdk

Can't use bitcoin-cli commands, error message says "could not connect" from localhost

Can't use bitcoin-cli commands, error message says &quot;could not connect&quot; from localhost I am simply trying to run bitcoin-cli getinfo on the same machine that my bitcoin node is running on (with bitcoind -daemon) my bitcoin.conf file is as follows: server='1' rpcuser='username' rpcpassword='password' rpcport='8332' The error message I receive is: error: Could not connect to the server 127.0.0.1:0 This error is confusing me in two ways. First, my home network uses an Xfinity gateway (combined router/modem), and the local ip addresses look like 10.0.0.xx, not 127.x.x.x. Second, why is the error suggesting that it tried to connect on port 0? I have specified in bitcoin.conf that the rpc port is 8332. In this current state I can run a node, but I cannot make any rpc calls, rendering it useless for my purposes. Any advice on how to fix this issue? http://bit.ly/2ENIwnA

Bitcoin ECDSA signature in the compact format

Bitcoin ECDSA signature in the compact format I would like to understand how to get Bitcoin ECDSA signature in a compact format, when it's exactly 65 bytes. In the bitcoin-core repository, secp256k1_ecdsa_recoverable_signature_load is responsible for this. As far as I understand, in it r and s are separately reduced to a 32 byte representation using secp256k1_scalar_set_b32 , but I don't understand how it function works. What is a EXHAUSTIVE_TEST_ORDER? Why does the resulting representation of 32b scalar remain valid after it? I would be very grateful if someone could explain it to me. http://bit.ly/2SeCbEI

Credit and debit card to bitcoin

Credit and debit card to bitcoin I need an anonymous service for people to be able to pay with a credit or debit card and the amount they pay to be deposited into my bitcoin account. What's the best way to do it? http://bit.ly/2Adhdz8

BITCOIN SENT TO ADDRESS ON EASYINVESTMENT.ONLINE

BITCOIN SENT TO ADDRESS ON EASYINVESTMENT.ONLINE Hi i tryd to invest some bitcoin with easyinvest.online and they gave me an address to send it to so i sent it via withdrawls on my binance account and it does not seem to be showing up or investing http://bit.ly/2Q1mLl2

How to create raw transaction using bitcoinj

How to create raw transaction using bitcoinj I'm using bitcoinj for bitcoin transactions. Now I wnat to send the transaction. For that I need to create raw transaction. How can I create raw transaction using bitcoinj? Please help. Thanks. http://bit.ly/2GGsJIL

Unable to get transaction with json-rpc command

Unable to get transaction with json-rpc command I am trying this command to get transaction from bitvoin testnet: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "gettransaction", "params": ["txId"] }' -H 'content-type: text/plain;' http://username:password@IP:PORT/ And i am getting following error { "result":null, "error":{"code" :-32601, "message" : "Method not found"}, id:curltext} Please help. http://bit.ly/2AdFFAl

Why can’t lightning tx’s be signed with sighash single to allow for fee updates?

Why can’t lightning tx’s be signed with sighash single to allow for fee updates? Are out-of-band fee payments to confirm a lightning closing transaction the only way to manage a situation where the sat/kw of a previously signed commitment tx are simply below market? If additional inputs/outputs could be added, fees could be easily adjusted to the fee rate during channel closing and not at the time when the tx was signed... http://bit.ly/2EMbAf9

Blockchain synchronization is painfully slow / Best way to download blockchain

Blockchain synchronization is painfully slow / Best way to download blockchain I'm trying to setup my own Bitcoin node on Ubuntu 16.04.1 LTS. Right now, I've stuck with blockchain synchronization. I'm letting bitcoind to run every day for at least 10-12 hours while I work and it already takes three days to download 83% of the entire data. I have very good Internet connection, it should take no more than two hours to download 80 GB of data, however, it's taking at least 30 hours already. My connection is practically free from other downloads most of the time. I've googled this problem: some people say that current version of the bitcoind is so fast that it doesn't matter how blockchain is downloaded throught the Bitcoin network or by torrent. Other people say, that it takes a week to download the entire blockchain. Is there a way to optimize my setup to make it download blockchain much-much faster? Or do I better download it via some torrent and then syn

Bitcoin Mining Difficulty has Decreased by 7%, Traders are Leaving Crypto Market

Bitcoin Mining Difficulty has Decreased by 7%, Traders are Leaving Crypto Market With the prolonged bear market, Bitcoin mining difficulty has lost another 7% of its total capacity over 24 hours. Even though the Bitcoin price recovered over $4,000, miners see no point in continuing their activity. It is still too hard to make a profit or break even under such circumstances. http://bit.ly/2QOV5p3

What really happen when user moves fund between Main Account and Trading Account in HitBTC?

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What really happen when user moves fund between Main Account and Trading Account in HitBTC? I am building a crypto exchange and I wonder how HitBTC exchange ( https://hitbtc.com/ ) is handling "Main account" and "Trading account", as the image below: According to them, Main Account is like cold wallet, while Trading Account is like hot wallet. Storing your fund in Main Account (cold wallet) will be safer to your fund. Now, let's talk about definition of cold wallet and hot wallet. Cold wallet means private key is stored offline, while hot wallet means private key is stored online. So, am I correct that, when user store his fund in "Trading Account", what really happens is, HitBTC moves private key of that particular user's wallet to an online server? And when the user moves the fund to "Main Account", what really happens is, HitBTC remove the private key from online server and store it in online offline servers? If yes, then how can

With the Bittrex BTC-BCH pair how do I order enough BCH to exactly spend one BTC?

With the Bittrex BTC-BCH pair how do I order enough BCH to exactly spend one BTC? Bittrex orders have their lot size/quantity in BCH and price in BTC. If I only have one BTC in my wallet how can I convert it all to BCH? To ask another way: How do I know the exact quantity of BCH to order so that I fully convert my one BTC to BCH. Note this question applies to other pairs and other exchanges. I am also looking for how fees would come into the equation as if I request too much BCH there might not be enough BCH in my wallet to cover fees. http://bit.ly/2QQwJLB

Why can’t lightning tx’s be signed with sighash single|anyonecanpay to allow for fee updates?

Why can’t lightning tx’s be signed with sighash single|anyonecanpay to allow for fee updates? Are out-of-band fee payments to confirm a lightning closing transaction the only way to manage a situation where the sat/kw of a previously signed commitment tx are simply below market? If additional inputs/outputs could be added, fees could be easily adjusted to the fee rate during channel closing and not at the time when the tx was signed... http://bit.ly/2rSdbr5

On Coinbase Pro does anybody know what criteria are used to decide if a limit order should be rejected due to insufficient funds?

On Coinbase Pro does anybody know what criteria are used to decide if a limit order should be rejected due to insufficient funds? I'm playing around with their sandbox api and trying to figure out when a buy order will be rejected due to insufficient funds. It seems that market orders will be rejected only if you give the order funds greater than the amount of USD you have in your wallet. That seems straight forward enough. The case for limit orders seems a little bit more complicated. If I have $1000 in my wallet and I specify a buy order for 1 BTC for $1000 the order will be rejected due to insufficient funds. I'm guessing this is because I need money for any possible fees. However if the order goes on the order book as a maker order. My question is do I need enough USD for possible fees regardless if the order becomes a maker or a taker order? http://bit.ly/2EHpQ7R

Ardor: How to decide if an asset can be send?

Ardor: How to decide if an asset can be send? My (Javascript) frontend needs to decide whether the user can send an Ardor/Ignis asset in his account. My code checked for: quantityQNT >= amount_to_send But I realise that this doesn't work if the user has the asset offered on the asset exchange. So just checking for unconfirmedQuantityQNT wouldnt be clever either, as it might want to send an asset which ownership never confirms (phasing or fork). Would it be safe to check this way: min(quantityQNT,unconfirmedQuantity) >= amount_to_send Thanks for your opinions http://bit.ly/2AcMAcK

Why are most Bitcoin payment invoices time limited ?

Why are most Bitcoin payment invoices time limited ? Most bitcoin payment gateways issue time-limited payment invoices. Why is that ? AFAIK, the address stays valid even after the timer is out. For instance when sending a transaction from wallet to wallet, even if I send to that address after the 15 minutes, the recipient still gets their money. I have tried this with at least 3 wallets. In this case, what's the timer for in the first place if the address is still linked to that user ? Thanks. http://bit.ly/2Ri8THO

How to attach an encrypted message to a payment transaction inside a contract?

How to attach an encrypted message to a payment transaction inside a contract? How can I attach an encrypted message to a payment transaction from inside a contract? In release 2.2.0e it was possible by just calling the SendMoneyCall API with .messageToEncrypt: SendMoneyCall sendMoneyCall = SendMoneyCall.create(<chain id>) .recipient(<recipient account>) .amountNQT(<amount>) .messageToEncrypt("test message"); this doesn’t seem to work in version 2.2.1. Do I have to do it manually now? Like first encrypting and compressing the message and then adding it to the transaction via sendMoneyCall.message(“test message”)? I asked this question in ardors slack developer channel and post it here for documentation. After a small dialog in which I detailed the occurring error with a small example contract I got an explanation with a working solution: About the messageToEncrypt parameter, the problem is that when a transaction is submitted by

Blockchain endpoint working

Blockchain endpoint working I wanna clear this thing that how blocks are retrieved and created in from the nodes using an end point. The end point is basically centralized and have nothing to do with network if i'm not wrong. Is that end point is also running some kinda setup to keep blocks in sync as well as connected nodes? In a network we have nodes [B,C,D,E,F,G...] and we have endpoint A. Lets say we have to retrieve a block then on which node the request will be sent? Take example of STORJ in that request lands on one server(kinda end point) only then it broadcast to all. Isn't the centralized system. http://bit.ly/2V6kVmI

ICO Obstacles: Thai SEC Considers Loosening ICO Regulations

ICO Obstacles: Thai SEC Considers Loosening ICO Regulations The Thailand (Thai) Securities & Exchange Commission (SEC) is purportedly considering whether to smoothen the country’s regulation for ICOs. The regulator is carrying out a public hearing to calm down rules on pre-sales and private crypto sales. The SEC has also uncovered plans to stop the usage of crypto sales. http://bit.ly/2Sk2jy2

Italy Steps Back on Tech Innovations Amid Pro-Blockchain Rules Increasing Globally

Italy Steps Back on Tech Innovations Amid Pro-Blockchain Rules Increasing Globally Blockchain technology is being highly adopted in all corners of the world, but Italy seems to be running away from it. Citizens are not sure where exactly the country is heading, some think it's going back to year zero. http://bit.ly/2Lx1MGl

Confusion about `unloadwallet`

Confusion about `unloadwallet` It's not clear to me how unloaded wallets behave in Bitcoin Core v0.17.0.1. If I create a new wallet with createwallet, add a receiving address to it using importmulti, then unload it using unloadwallet: Will bitcoind still detect payments to this wallet’s address(es)? (seems yes) If yes, will that detection happen only when I use loadwallet again? (seems yes) If yes, will that require a rescan of (recent) blocks? (I'm worried about how long this might take, if it's been months or years since I last loaded this wallet.) If yes, will that be a problem on a pruned node? If yes, should I avoid this multi-wallet feature on a pruned node, or is there a safe way to use it without risking large re-downloads? (e.g. never unload it) http://bit.ly/2EDRK4N

How relevant is the Chinese Great Firewall in the blocksize debate?

How relevant is the Chinese Great Firewall in the blocksize debate? Mike Hearn said the following: The reason the true limit seems to be 700 kilobytes instead of the theoretical 1000 is that sometimes miners produce blocks smaller than allowed and even empty blocks, despite that there are lots of transactions waiting to confirm — this seems to be most frequently caused by interference from the Chinese “ Great Firewall ” censorship system. Also, he mentioned on another occasion that the bandwidth through the GFW, is only about 50 KB/s, sometimes less. In the best scenario you can get 3 MB/s, according to Scaling Bitcoin Conference. Mike put lots of accusations towards the Chinese regarding blockchain development, but how much of that is true and if there's some solution, what will be the solution? http://bit.ly/2AmXvRB

Innovative Space: U.S Lawmakers File a Bill Seeking to Exempt Crypto Assets from Securities Laws

Innovative Space: U.S Lawmakers File a Bill Seeking to Exempt Crypto Assets from Securities Laws Two Congress members of the U.S. House of Representatives are now looking for ways of exempting cryptos and other digital assets from the federal standard securities laws. A bill was tabled before Congress on December 20, 2018. http://bit.ly/2GCg4GU

How does Bittrex charge its commission?

How does Bittrex charge its commission? Assume I want to trade the BTC-BCH pair. I have only one BTC in my exchange wallet and want to buy one BTC worth of BCH. What currency will the 0.25% commission come out of? Will I need to trade 1 BTC - 0.25% so there is enough funds in my account to cover the commission? The same question goes for selling BCH to receive BTC Where I have only 100 BTC in my exchange wallet and want to convert it all to BTC. Will I need to ensure that I only convert 100 BCH - 0.25%? http://bit.ly/2SlVkEQ

Monitor bitcoin transaction confirmation timestamps

Monitor bitcoin transaction confirmation timestamps Well, i'm planning on developing a graph that shows bitcoin transaction average confirmation time per hour , but i have no clue where i can get transaction confirmation timestamps. I'm running bitcoin core node with whole blockchain and sync up to date. Any ideas ? http://bit.ly/2CtNlzZ

Central Bank Reports Hints Tether Lied | Brian Armstrong Pledges His Wealth | Halvening Hype | More!

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Central Bank Reports Hints Tether Lied | Brian Armstrong Pledges His Wealth | Halvening Hype | More! 😀 Thank You For Watching! :D! P -Please Consider Supporting The Channel To Keep It "Paid-For" Ad Free! ► Patreon Sponsors (Private Telegram Group) - https://goo.gl/vpX5sW ► YouTube Sponsors - https://www.youtube.com/channel/UCdUSSt-IEUg2eq46rD7lu_g/join 🚩 Remember to subscribe and hit the bell "🔔" icon to enable notifications for live-streams! Crypto Donations Are Really Appreciated! ►💓Donate Ether and Ethereum-Based (ERC-20) Tokens: 0x1466032B4F0F13910DA35B16371807428CB40714 ►💓Donate Bitcoin: 3JKQycXHdD5yqSRTf5VabM28Ff9AfXYcJD ►💓Donate Using Paypal: https://goo.gl/7m1X4Z HELPFUL LINKS / SOURCES ► Bahamas Monthly Economic & Financial Developments August 2018 - http://bit.ly/2EJxyPJ ► What Is M3? - http://bit.ly/2mic7u9 ► Central Bank Reports "Prove" Bitfinex & Tether Do Not Have Banking In The Bahamas - http://bit.ly/2T6iQp0 ► Bitfinex Introd

Interview w/ Horizen (ZenCash) Founder Rob Viglione!

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Interview w/ Horizen (ZenCash) Founder Rob Viglione! 😀 Thank You For Watching! :D 🚩 Remember to subscribe and hit the bell "🔔" icon! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SUPPORT THE CHANNEL ► Patreon Sponsors (Private Telegram Group) - https://goo.gl/vpX5sW ► YouTube Sponsors - https://www.youtube.com/channel/UCdUSSt-IEUg2eq46rD7lu_g/join -~-~~-~~~-~~-~- Crypto Donations Are Really Appreciated! ►💓Donate Ether and Ethereum-Based (ERC-20) Tokens: 0x1466032B4F0F13910DA35B16371807428CB40714 ►💓Donate Bitcoin: 3JKQycXHdD5yqSRTf5VabM28Ff9AfXYcJD ►💓Donate Using Paypal: https://goo.gl/7m1X4Z -~-~~-~~~-~~-~- MUST HAVE ► The Ledger Nano S Crypto Hardware Wallet - http://bit.ly/2nY4tYQ ►Trezor Hardware Wallet - http://bit.ly/2LxY9QA ► Personal Book Recommendations & More - https://amzn.to/2Br4nPB -~-~~-~~~-~~-~- 🎁FREE STUFF ►The Brave Browser (Fast Browser That Will Pay You In Tokens If You Choose To View Ads): https://goo.gl/NpNa53 ►Search Sites Like Google Anonymousl

What's the exact formula where I can calculate my liquidation price on Bitfinex for a leveraged position?

What's the exact formula where I can calculate my liquidation price on Bitfinex for a leveraged position? The following variables are given: Exchange: Bitfinex Funds: $10,000 USD BTC Price: $1000 Use Leverage of: 2x = $20,000 USD Say I wanted to go long Bitcoin thinking it would be above $1000 in the next 6 months. I buy 20k USD worth of BTC (20 btc) at the $1000 price. What does the price of btc have to drop before I lose my initial investment of $10,000? What is the formula for something like this when using Bitfinex exchange? http://bit.ly/2Lv1CiE

I accidentally transferred my Bitcoin Cash to Bitcoin (BTC) wallet in BitMEX!

I accidentally transferred my Bitcoin Cash to Bitcoin (BTC) wallet in BitMEX! A few days ago, I bought 135 Bitcoin Cash and transferred it to my BitMEX Bitcoin BTC Wallet by accident! This is money that I can't afford to lose! What do you suggest I do? My conversations with BitMEX: ME: Hi! Please help me I just accidentally transferred my Bitcoin Cash to my BitMEX Account. I didn't realize that it needs to be Bitcoin and not Bitcoin Cash. Can you please reverse the transaction so I can fund my BitMEX account properly? BitMEX: Unfortunately, our wallets are not capable of BCH withdrawals without extensive development and time, which means the funds are essentially unrecoverable/frozen at this stage. I have placed your details on a list of users who have deposited BCH, and we will contact you if/when we upgrade our wallets to enable withdrawals. Currently there is no ETA on this. ME: Are you telling me that the funds are unrecoverable/frozen at this stage, but once your wal

Russia Plans to Introduce Regulations Putting Limits on ICO Investments

Russia Plans to Introduce Regulations Putting Limits on ICO Investments A new bill regulating investments in initial coin offering (ICO) projects will take force soon. Government officials have released a draft law stating that average Russians will be allowed to invest in ICO no more than $9,000 per year. http://bit.ly/2BytbTM

Business Register : Italian Court Repudiates Registering Blockchain & Crypto-Related Companies

Business Register : Italian Court Repudiates Registering Blockchain &amp; Crypto-Related Companies All businesses operating in Italy that use crypto will not enjoy the full importance of decentralised economy. Firms based on the digital currency mechanism or using crypto won’t be qualified to register their commercial enterprises with Business Register. The Italian court judge made a ruling in a decree number 7556/2018 late November, 2018. http://bit.ly/2RaDQ0G

Western Union is Ready for Crypto Use in its Payment & Transfer Services

Western Union is Ready for Crypto Use in its Payment &amp; Transfer Services The American-based leading financial services firm, Western Union, is now more than ready to start using cryptos for payments. Odilon Almeida, the president of Western Union, revealed in a video interview with Reuters Plus, that the financial institution has been evaluating and ascertaining the deployment of digital currency. They are further delving into ways through which the service delivery using distributed ledger technology (DLT) can be improved. Western Union, founded in 1851, operates in more than 200 nations across the globe. http://bit.ly/2QNu5Gg

Mining Zcoin (XZC) with the New MTP Algorithm on AMD and Nvidia

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Mining Zcoin (XZC) with the New MTP Algorithm on AMD and Nvidia Zcoin (XZC) has recently switched to a new algorithm called MTP as a means to be ASIC-resistant, it is a new algorithm and mining software is still being developed, but there are already miners available for CPUs (not that useful anymore) and GPUs – for both AMD and Nvidia. If you are interested in trying out to mine Zcoin you should be aware that the algorithm needs more memory, both on the GPU (4 GB VRAM on the video cards as minimum) as well as on the mining rig where 8 GB plus is a must have preferably 16GB for 6-8 GPUs. Also you should note that miners are still being optimized, so performance and stability can be further improved and you can expect to have some issues at this point. if you want to try out the CPU miner for MTP you should be aware that it also needs a fixed 4 GB per thread so with an 8-core processor, you would need 32 GB of RAM. If you are using Nvidia GPUs for mining you should head over to the c