Cryptocurrency expert here!

Old wallet unconfirmed from 2013 Anybody know what this means? Just restored it, its been synced for only 10 min but when I mouse over it just says unconfirmed. Do I wait or is something else going on? http://ift.tt/2i3wadl

unanswered question concerning private key Scenario: I have a wallet at blockchain I lost the paper with the second password and private key I have the wallet address, the login password to the wallet, and 12 word mnemonics I was suggested to make a brandnew wallet, then import the old's wallet's address I've done so, but it imported as a "watch only" address and it wants the private key. I used the bip39 with my mnemonics, but the address is not to be found in the bip39 generator. What can I do? http://ift.tt/2i4GaD6

Judging the accuracy of coinwarz's solo mining calculator I'm trying to determine when to solo mine an alt coin - obviously I can't solo mine BTC. :) The calculator on coinwarz states: Days to generate one block mining solo: 33.89 Day(s) (can vary greatly depending on your luck) So the question is what does this truly mean? I've solo mined before but only on such low diff coins that I wasn't concerned. But at 30 days or so. Yikes, there is a concern. When you flip a coin the expected time to get a head (or tail) is 2 flips (generally speaking). More precisely you have a 50% chance of getting a head in one flip; 75% chance in two; 87.5% chance in three ... and so on. So what does Coinwarz mean when they say 33.89 days? Is this the "two flips" sort of answer or is it something else? My z-nomp pool, for example, gives a completely different answer. It says that my "luck" is 12 days. http://ift.tt/2jAene8

Coinbase price discrepancy? At the moment the price of a bitcoin on the Coinbase dashboard is $8247 EUR, however in the buy section it's $8840 EUR. I know they have some commissions and spreads, but that's 7%... Is this a bug or a feature? Moreover, the sell price is $8755 EUR! Much higher than the market price! I even bought some for 10 dollars to make sure. In GDAX, which is Coinbase's exchange the price is $8244. Why does Coinbase sell/buy for so high? http://ift.tt/2i4G7Hq

Does mining without a realistic chance of solving a block provide any benefit to the network? Okay, before anyone votes to close this as a duplicate, I would like you to hear me out. Since I began using Bitcoin, I always thought about miners as the people that effectively "host" the bitcoin network as if it were a website. I know this isn't entirely true, but its the analogy i've been using for a while. What I want to know is if I mine Bitcoins on my mid 2011 iMac with the sole intention of helping the bitcoin network, will I be providing any real benefit to the network or will I just be fruitlessly trying to solve problems when the bigger, faster, mining-dedicated computers will ultimately beat me to it? EDIT : Also, as an extension of my question above, could I be one of those miners that tweaks he software and only processes transactions with no fees to provide a greater benefit or would this approach still cause me to get out-hashed by bigger, better computers?

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coinbase discrepancy? at the moment in coinbase dashboard the price of a bitcoin is 8247 Euros, but in the buy section it's 8840. I know they have some commissions and spreads, but that's 7%... Is this a bug or a feature? Moreover, the sell price is 8755! Much higher than the market price! I even bought some for 10 dollars to make sure. In GDAX, which is coinbase's exchange the price is 8244. Why does coinbase sell/buy for so high? http://ift.tt/2jz6x4J

Which exchanges, if any, satisfy the following requirements? [on hold] Accepts non-US/non-EU citizens (specifically, they must accept South African citizens). Must be a mostly international or US based exchange (like Coinbase or Kraken). That is, it's supply and demand must either largely be based in the US or EU. Has an API which supports depositing from bank card ($US) into exchange. Has an API which supports withdrawing(sending) from the exchange/wallet, via email. (like this one: http://ift.tt/2xdwLQq ) An example of an exchange which meets requirements 1 and 2, but fails 3 and 4 is CEX.io, while an exchange meeting requirements 4, but failing all others would LUNO.com http://ift.tt/2i4JYnT

How to mines scrypt altcoins before a pool exists? Nowdays, it’s no longer possible to mine any new altcoin as first miner. As soon as a mining pool is announced on bitcointalk for a freshly new coin with new blockchain, there’s 1Gh/s of mining power on it less than 5 minutes later. Is it possible to use ccminer/cgminer for solo mining directly from databases an ports ? If not, how to set up a pool for an altcoin with wallet software that don’t provide a mining port ? An example use case I’m talking about is https://gmdcoin.co (scrypt coin with no mining pool and wallet only capable of stacking) http://ift.tt/2i4G3ra

Is the Venezuelan dictatorship gaming bitcoin? [on hold] The social system in Venezuela is not reducing corruption at any level of government. This trouble is occurring at the same time as a massive increase in bitcoin price. Assuming the regime is a socialist kleptocracy: Is it possible to launder vast sums (+1bln) of hidden money through bitcoin? http://ift.tt/2jA3qcB

Where is seed in Bitcoin Core in comparison to Bread Wallet Im new to Bitcoin. I know the main software of bitcoin is Bitcoin Core. Recently i started using an iOS wallet called Bread. Its very simple! It gives me a 12 word key and says your master private key can extract from this and no need to backup your wallet as a file. My question is: i readed that Bitcoin Core in the new versions is an HD Wallet. But it never gives me a seed like bread. Im confused. I have an assumption but i dont know its right or not: My master private key stored in a file unlike bread. I have to encrypt my walled from bitcoin core settings menu and the from file menu choose Backup Wallet and save it. In fact, in the future, i have to import that file and enter encryption passphrase that i created in the encryption step and the software fetches my private key from that file and load my entire wallet from blockchain. In bread i enter that 12 word and bread creates my private key and so on... in bitcoin core

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Security concerns when downloading the block chain from a 3rd party source? It takes very long until bitcoin-core has downloaded the whole block chain. So I decided to download the block chain files via a bittorrent published by this website: http://ift.tt/2AmeQbY After the download was finished I noticed that the md5 checksums of the files from the torrent were different then of the files from bitcoin-core. Why could that be? Are there any security related concerns of using a block chain from a 3rd party source? http://ift.tt/2itFGKO

How is eth transaction so fast than btc? If im not wrong miners are trying to find nonce that satisfies a rule. then why is btc so slow? i want a technical answer. can btc ever match eth speed given no politics http://ift.tt/2Ata9zx

How is a miner prevented from adding transactions without signatures to their block? Consider I'm a miner. I mine on my own, I don't mine in pools. I have power enough to find the hash, lets say, once per 2 years. When I find the hash within those 2 years I send the block back to the network and since the hash is low enough the block would be accepted and added to the block-chain. It's up to miners (so me) to check the transaction signatures but the block AFAIK doesn't contain the signatures. How can others within the network can be sure that all the transactions in my block which I calculated were signed? If I was an evil miner, I could have added a transaction without a signature. How is this prevented? Am I the only one who checks the signatures within my block? Thanks for explanation. http://ift.tt/2itFE5E

How can extended public keys generate child public keys without generating the child private key in HD wallets? According to the documentation on bitcoin.org and the Mastering Bitcoin book, you can use an extended public key to create child public keys in HD wallets by combining the lefthand side of the hash output of the parent chain code + parent public key + index: The seemingly-random 256 bits on the lefthand side of the hash output are used as the integer value to be combined with either the parent private key or parent public key to, respectively, create either a child private key or child public key I understand how this lefthand side output can be combined with the parent private key to generate the child private key, which in turn can be used to generate a valid child public key. How is it possible that the child public key generated by combining the hash output with the parent public key corresponds to the child private key generated separately by combining the same has

How to convert an Electrum 12 word seed to a private key? How can I convert an Electrum 12 word seed to a private key? I heard Electrum has a special type of algorithm where the 12 word seed can't be used on other wallet software; is that true? http://ift.tt/2isRgFZ

Can a hardfork occur due to changing the consensus protocol Hardforks occur when protocols with cryptocurrency occur such as modifying any of its parameters. Is it possible or has it ever happened for a hardforked altcoin to exist due to a change in the cryptcurrency's consensus algorithm. I mean a change from proof-of-work to proof-of-stake for example, not just changing the hash function used within the proof-of-work as happened with Bitcoin gold. http://ift.tt/2AqiqnL

What is the most expensive part of mining? From my understanding, miner's take a bunch of transactions and use a nonce, previous block and the transaction data to try and find a hash that beats the difficulty. As soon as this happens, will their block be added, and then 99 blocks later the BTC will be awarded. Is the solving aspect of the hash the most expensive part, for the computer? Or is gathering the transactions and confirming them more expensive? How does one confirm the transactions? Do they have to traverse the entire blockchain, or only find the most recent ledger which shows both user's balances to confirm? http://ift.tt/2isRblF

Where's my bitcoin account? Some time ago I bought BitCoin. That was the only transaction. Now I'm looking to sell my holdings, but when I try to access my balance with the BitCoin address, I get a report of a zero balance. Advice on tracking down my coins? Thanks! http://ift.tt/2At9ONh

Is mining essentially just a way to randomly select the next winning miner? I know it's not really a completely random selection because some miners have more hashing power so their odds are increased. But let's assume for a moment that all miners are about equal in hashing power. The way I see it, whoever solves the current block is (almost) completely unpredictable and thus mining is just a way to randomly select a winning miner. I understand about decentralizing and the need for a decentralized way of selecting this winner without trusting a higher authority for this random selection. Let's imagine for a moment that there was this "god-like" machine somewhere, completely trustworthy and incorruptible, impossible to bring down or shutdown and completely fair. Let's say this machine would select the winning miner that would create and sign the next block and get the reward and fees. Would there still be a need for mining in that case? http://ift.tt/2iqI

Unconfirmed btc transfer My btc transfer is not confirmed for last 2 days ,how can i send or return that amount , my transaction id is c7a4d061ee5db02b7c837252f0a950645ec0f7b22907b648edd0bdc4c9c513f2 Thank you http://ift.tt/2isLHaL

How can Electrum restore a wallet? I've some questions about the technique of storing and restoring a wallet using Electrum. I found out that Electrum stored a file on my PC. This file has my wallet's name so I think this file contains my bitcoins. If I deleted this file, my money will be lost forever, Am I right? I have 12 words (The seed). Will those words restore the file if it is deleted? Or Are they just used to restore password? What are all the things that I need to restore my wallet? (Eg. the file, the seed, the password, private keys, ... etc) Thank you so much, http://ift.tt/2ApA0sa

sending Satoshi to a output of a unconfirmed transaction this is a hypothetical question, reason is that my own incoming transaction is stuck because of another ancestor transaction that is already in mempool. for almost 1 day. since I am neither the sender or receiver of this transaction that is stuck. would it be still possible for me to send coins to the output of the unconfirmed transaction with a higher fee so that the one that is in limbo due to low fees will pass through? I have a full bitcoin node running locally. however I don't have mining power to mine those stuck transaction. so i am looking for alternatives. Thanks in advance why I don't just to CPFP on my own is because mine hasn't reached mempool yet, I get the pending que from chain.so which is hashflare.io private block chain gui which includes pending widthtawals http://ift.tt/2ng3BPn

Is there any way to listen to all transactions using bitcoind api? I understand that using json-rpc to listen for all transactions is a bad idea due to performance, but bitcoinj is able to do it. In reality bitcoind is parsing all transactions under the hood when it forwards them. Is there any way for bitcoind to notify me when it sees a new transaction (not paying to an address in the wallet)? Surely its is able to notify other peers, so why not me? One solution I am thinking of is running connecting a bitcoinj node to my bitcoind and then using that to listen to transactions. Another solution is to just listen for blocks and lose the ability to see zero conf payments. http://ift.tt/2AsCF4c

Storing private key in apps and softwares that are local Im new to butcoin. I installed an app in my phone called Bread. And another in my computer called Electrum. Both of them generated a seed(12 words) for me and it seems that seeed is my private key in the bitcoin network. My question is: these softwares has my private key and i dont know if they stored it in remote servers. This means someone other has my private key and can access my money? This is a safe way in bitcoin culture? They are really local? I want to use safest way to work with bitcoin and i dont want store my info in any website or app that can access my account, delete my account or any other intervention. For safest way should i have my own copy of public ledger in a personal server? What is the safest way? http://ift.tt/2nidhJd

ETC vs ETH how do I know the difference? How do I know if Ethereum is ETH or ETC, when the exchange just offers "Ethereum" http://ift.tt/2AqCjuX

Does changing mining algorithm(SHA256) of bitcoin cause any side effect? One example is bitcoin gold change SHA256 to Equihash, does it cause any side effect? http://ift.tt/2nidhcb

how does bitcoind functions in bitcoin exchange model? i mean exchange allows every users a unique BTC deposit address different users sends btc to different addresses but BTC endsup in same wallet can i create multiple receiving address by bitcoind (getnewaddress) or i will have to use HD wallet for that for our users (we are building lotto system on bitcoin) http://ift.tt/2Arg9Zr

Crypto exchange preventing me from exchanging bitcoin because my order will cause 'substantial loss' I was going to exchange some very small amount of bitcoin for Ethereum-Classic and got prevented by the exchange, BTCMarkets because im in Australia saying it would cause me substantial loss when I tried to do the trade I thought that if Bitcoin is higher (right) now and ETC is lower, whats the issue with buying ETC with Bitcoin. Don't you get more ETC if its low relative to Bitcoin than if it was high? To simplify this even more, lets say that right now: 1 BTC = 5 ETH You buy 5 ETH with your 1 BTC. After one month the 'value' of ETH goes up. This is good? Why would I be prevented from buying ETC when its fallen 10%? http://ift.tt/2ng3uDr

Differences between types of paper wallets at bitaddress.org What are the differences between the different types of paper wallets offered at bitaddress.org? I think the same question applies for the paper wallets offered at bitcoinpaperwallet.com. http://ift.tt/2AsCENG

How do I buy bitcoin as a business to make business purchases? How do I buy bitcoin as a business to make business purchases? I went to signup at CoinBase, but it redirects business accounts to GDAX, and GDAX seems to be made for investing only not purchasing business goods. What's a good option for a business? We want to pay our web developer in bitcoin for example. http://ift.tt/2niAfjc

Bitcoin Chainparams.cpp what is - base58Prefixes[PUBKEY_ADDRESS]? I am creating an altcoin for fun from the Bitcoin core source code, and I am currently looking through the code in chainparams.cpp and I have come across this line: base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,0); What does this code do? Why would you want the first character in this vector to be 0? http://ift.tt/2j4nMv9

What is consensus.BIP34Height? In the bitcoin source code, I am looking at chainparams.cpp. I can see on line 81 something called consensus.BIP34Height? What is that? I can't figure out what this is. I'm not sure what else to ask other than what is this? I can't see any mention of it in the developer reference. http://ift.tt/2Bo9FHX

I have a Litecoin Core wallet working - but how do I get passphrase I have a Litecoin Core wallet working with coins in - but how do I get passphrase? This might be a stupid question but I can't find this anywhere. I'd like to setup the wallet on a second machine just by typing a passphrase. I can do this with Electrum but not Litecoin Core? I can't see any option for this?! http://ift.tt/2j4aijb

How do I change what wallet Coinbase deposits BTC into when buying? Right now I have to buy into Coinbase and then transfer to another wallet. Can I have Coinbase just send it directly to the wallet and cut out the extra transfer? http://ift.tt/2iooRRc

Legally shuttering miners and full nodes by adding illegal information to blockchain [duplicate] This question already has an answer here: Ramifications of illegal content in transaction messages? 2 answers In many jurisdictions possession or distribution of certain information or content is illegal. Illegal primes, classified information, magnet links to copyrighted torrents, hate speech, outlawed pornography, incitements to terrorism, etc. Not all of this is efficiently encoded in the blockchain, but at least some can be. Let's say a wealthy malicious actor wanted to disrupt the bitcoin network or crater the price. He could subsidize transactions containing illegal content. Moreover he could most likely do this anonymously or near-anonymously. One or two instances would most likely be ignored by legal authorities. But persistent violations would most likely raise the ire of the courts. US federal judges regularly issue injunctions taking down websites. It's unlikely

My bitcoin was stolen yesterday I lost more than 9000 . Please help [on hold] I had my wallet on blackchain.info and someone stoled it, I have the IP adress of the person or page who stole it, do you think I can get it back and how? http://ift.tt/2i1O2oU

How to choose an exchange? Let's assume you want to exchange traditional currency for Bitcoins and choose to do so through and exchange. What are the most important factors/features that you should keep into consideration for choosing an exchange? http://ift.tt/2iliPRv

How do I move my DigiBytes from liteBit.eu to my wallet [on hold] I recently bought Digibytes from the LiteBit.eu exchange, the status says the transaction is finished. However the coins never appeared in my wallet and I cannot or I do not know how to get the coins into my wallet, support desk so far is useless, can anyone help me get my coins back please. http://ift.tt/2AnOzwf

Is the seed everything I need to recreate a wallet? During creation of my wallet, I was given a list of 12 words ("the seed") that I scribbled somewhere. Let's assume that I lose all my storage, everything related to my wallet -- except for the seed. Are these 12 words enough to recreate my wallet from scratch and regain access to my bitcoins? http://ift.tt/2ioKuRJ

Cheating while mining Consider I'm a miner. I mine on my own, I don't mine in pools. I have power enough to find the hash, lets say, once per 2 years. When I find the hash within those 2 years I send the block back to the network and since the hash is low enough the block would be accepted and added to the block-chain. It's up to miners (so me) to check the transaction signatures but the block AFAIK doesn't contain the signatures. How can others within the network can be sure that all the transactions in my block which I calculated were signed? If I was an evil miner, I could have added a transaction without a signature. How is this prevented? Am I the only one who checks the signatures within my block? Thanks for explanation. http://ift.tt/2jx1Isz

Integrate Bitcoin price in Google Sheets through Google Script How can I integrate the real-time value of the BTC/EUR pair to a Google sheet? What script can I use? For ETH/USD I use Poloniex and a script for that, but there is no BTC/EUR pair on Poloniex. This is the script I use for Poloniex and the ETH/USD pair: function getETHtoUSDTpoloniex() { var url = " http://ift.tt/1myUSiE "; var response = UrlFetchApp.fetch(url); var test = response.getContentText(); var myjson = JSON.parse(test); //var leng = myjson.data.length; var USDT_ETH = myjson["USDT_ETH"]; var price = USDT_ETH.last; return parseFloat(price); } Help please! http://ift.tt/2i1NWxy

Antminer D3 Blissz Modified Firmware For Improved Performance It is not a secret that the default firmware and even settings for many of the ASIC miners that come out from the manufacturers are hardly with the best/optimal settings and often they are also limited in what you can tweak yourself. So some more advanced users take the matter in their hands in order to further optimize for performance and or stability and reliability and even add extra features that help owners of the devices to get better profit or higher profit for example. One such case is the Antminer D3 Blissz Modified Firmware for the X11 ASICs being produces by Bitmain that you might want to give a try if you have even at least one of these ASIC miners. The custom firmware promises up to 20% lower power usage and some extra features such as ASIC voltage settings per chain as well as the ability to overclock or underclock per chain as well as more control on fan operational speeds. There are some usability improveme

Bitcoin Flash Crash! / John McAfee Was Wrong: $1,000,000 Dollar BTC / Nasdaq Futures / More! 👍 Thank You Very Much For Watching This Video! Don't forget to smash those LIKE & SUBSCRIBE buttons :D ►Become a Crypt0's News Patron: http://ift.tt/2vDXHXD 🚩🚩🚩A MUST HAVE ►Ledger Nano S (Top Multi-Asset Hardware Wallet): https://goo.gl/wZUVES (Official Site) http://amzn.to/2A9jD2k (Amazon) ►Hardware Wallet Superstore (5$ Off With Promo Code "Crypt0" - Orders Of $100 Or More): https://goo.gl/ftZL3w ►Hey!! Do You Enjoy Crypt0's News? 🚩Hit the "🔔" icon, after subscribing, to get notifications as soon as I upload a new video! 🚩Subscribe To My New VLOG For More Casual Crypto Content! https://goo.gl/kJnP4C 🎉Join The Crypt0's News Group: https://goo.gl/7zxDrt 🌎Follow Us On Steemit (Decentralized Social Media Platform) https://goo.gl/YNAK2u ►💎Donate Ether and Ethereum-Based (ERC-20) Tokens: 0x97f32d97D6Ce4dee3429279F04D5b96Aba7C969B ►💎Donate Bitcoin:

Replacing ECDSA (SECP256k1) with Schnorr signatures On March 23, 2017 the Bitcoin Core team published a technology roadmap, expressing their intent to replace ECDSA (SECP256k1) with Schnorr signatures: http://ift.tt/2mU7TX6 . Pardon my naive understanding, but we currently use ECDSA (SECP256k1) to generate public keys, and by extension- addresses. How does replacing the signing algorithm with a new signing algorithm not affect today's addressing? Does it? Where does backward compatibility fit in with this? http://ift.tt/2inWOkV

Crypto Wardrobe – Get Dressed in Cool Crypto Themed Clothes Upgrade your wardrobe with crypto themed t-shirts and hoodies thanks to Crypto Wardrobe , a new Lithuanian (EU) based service selling cool clothes and mugs for crypto fans. Since its crypto themed cool stuff, not only clothes, you can of also pay with Bitcoin and not only via traditional payment methods such as PayPal or bank card. It is a new service shipping their gear worldwide with free shipping when your order exceeds $70 USD value. More crypto themed stuff is coming soon in the form of thematic phone cases, hats, stickers and others. It is the perfect time to celebrate the latest new high for Bitcoin with a HODL shirt or a Bitcoin Miner or maybe something else cool. – For more details and to check out what cool stuff Crypto Wardrobe offers… http://ift.tt/2AnDSdg

Blockchain P2P Lending, Sending, and Spending: Etherecash Garners Support From Over 40,000 Contributors During Pre-ICO With more than 40 thousand contributors since the ICO Launch, November 15th, and an extraordinarily successful Pre-ICO in late October, Etherecash continue their strong run and look to burst into the Financial-Crypto market in the not-so-distant future. http://ift.tt/2ij1BUK

MyTrackNet – Connecting Users &amp; Finding Lost Items With Or Without a Bluetooth Tracking Device Greece-based MyTrackNet give details of their revolutionary lost-and-found platform designed to reward and benefit users, and offer information about their upcoming pre-ICO and main ICO scheduled for 14th December onwards. http://ift.tt/2jv8cbq

Simdaq Launches Social Platform for Democratisation and Development of Cryptocurrency Trading In 2017-2018, the team of crypto startup Simdaq will implement a comprehensive platform and marketplace for developing trading strategies on cryptocurrency exchanges. To date, the founders have already invested more than $1 million in the development of the project, which uses the SMQ token as its internal currency. The first stage of the Simdaq project, a trading simulator based on historical data of cryptocurrency prices, will be launched in November 2017. http://ift.tt/2ilrO5l

Bid4CC Spearheads the First-Ever Online Cryptocurrency Auction Determined to take the cryptocurrency sphere by storm on its day of launching, Bid4CC breaks ground online as the world’s first cryptocurrency auction site. http://ift.tt/2Am90to

Eliminating all private keys records from pc Suppose I buy a new wifi router and a new pc. I set up both the wifi network (of course, with a password) and the pc. Now I access the internet for a few seconds in order to download bitaddress.org from GitHub or as an HTML file. Then I turn off the wifi connection on my pc and open the downloaded file and generate many pairs of public and private keys (which I write down on paper). Once I'm done, I clear the web browser history, cache, cookies, etc. and delete the downloaded files. Would this be enough to make sure no records of the keys of any kind are left anywhere on the pc? Should I restart the pc before turning its wifi connection back on again? Or should I reinstall the operating system just in case? Or would it be a good idea to install Deep Freeze before generating the keys? I'm planning to continue using my pc for my daily work. Thanks in advance!! http://ift.tt/2An2Edm

I invested 2btc on shopzoro.us [on hold] i know this is maybe off topic but do you know anything about litecoin too? I recently invested with website shopzoro.us and i received about 2 BTC back,so i am very happy now but should i reinvest it or sell it what do you suggest regarding bitcoins? Will it go up, down? Thanks http://ift.tt/2AmXRZo

Unconfirmed transaction / double spend warning [duplicate] This question already has an answer here: Why is my transaction not getting confirmed and what can I do about it? 9 answers I transferred some coins from my Electrum Wallet to my Coinbase Wallet, however the transaction got stuck as unconfirmed (possibly because of low fees). It has been already 19 days since the transaction, the coins are still showing as unconfirmed in Electrum wallet and I can not use them as well. I am also getting a double-spend warning on BlockCypher. How can I push this transaction through without losing my coins? http://ift.tt/2AofTL7

Is it possible to use delegated proof of stake on an altcoin created using bitcoin? [on hold] I wanted to create an altcoin based on bitcoin. I wanted to know if it is possible to use delegated proof of stake protocol for the block production. http://ift.tt/2im9hWh

Create an issuance and a send within the same block (XCP) Using counterparty api I am issuing an asset, signing the raw transaction and sending raw transaction. Api I used is http://ift.tt/2imtNWK As it takes 10 or more minutes to confirm the transaction, is it possible to send the unconfirmed transaction using create_send? Or is it possible to automate from counterparty to send it after confirmation? http://ift.tt/2Anrd9W I have tried the advanced create_ parameters to no avail. http://ift.tt/2imk3vR

Blockchain Startup FREED to Integrate Gamers’ Computers Into a Single Worldwide Network FREED, a blockchain-based monetization platform for online games, has already raised $1 million in a pre-sale and has enlisted the support of IBM. http://ift.tt/2nbcB8l

Native Video Box: ICO Launch To Create The Future Of Advertising Native Video Box (NVB) is next-gen decentralized video distribution platform, based on cutting edge modern technologies of multi-tier blockchain and deep machine learning. http://ift.tt/2zLGj9U

SPECTRE Disrupts Financial Trading With the Removal of Brokers Cookeville, TN-The traditional belief within the financial market is that brokers are an integral aspect of it. They arrange sales between trader and stock seller for a small commission. That commission was their due for filling a role that only they could fulfill. http://ift.tt/2hXdT1l

Sent BCH to BCC wallet I just made the huge mistake to sent BCH from Exodus to my BCC wallet in bitfinex. Can I by any chance get my BCH back? http://ift.tt/2AEPeKv

How to list all the HD address in Electrum? I tried to restore all my HD address by importing my xprv in new wallet file but it only shows 20 addresses. How can I make it show all the child addresses of my xprv? http://ift.tt/2AbYchf

The ratio between propagation delay and block interval Is there a certain website or a study that gives an estimation for the ratio f = Propagation Delay/Block Interval for the Bitcoin network ? I know the Block Interval is roughly 10 minutes however, I don't know the propagation delay. I define it as the time it takes for all nodes to hear about a mined block after it's been broadcast. http://ift.tt/2AIc57G

How to use delegated proof of stake on the alt coin of bitcoin? I want to create a alt coin based on bitcoin and want to know how a delegated proof of stake protocol will be used for the block production. http://ift.tt/2ieqLUM

WHERE CAN I FIND MY BITCOIN CORE KEY? I bought some bitcoins a few years ago using Bitcoin Core. I have since discarded my computer as it broke. Where/how can I find my bitcoins? http://ift.tt/2jt3CdG

what is the source of bitcoin for trading site like koinexcoinbase/etc...? I understand sites like koinex/coinbase/etc.. credit bit coins when we try to buy bitcoins from them. How do they (koinex/coinbase/etc..) get bitcoins to give it to users when they buy? are they doing mining and getting coins? or do they buy bitcoins from somebody who is mining ? http://ift.tt/2ieqJME

Do I have to buy a full bitcoin to get the price increase? If I buy half a bitcoin at $500 and the value of a bitcoin goes up to $1000, does that mean I earn 1 bitcoin or do I have to buy a full bitcoin to get the price increase? How does it work? Please give me some examples. http://ift.tt/2jse7ht

BTC number of transactions I'd like to get number of transaction's data with API. I already use API of blockchain.info. Dose someone know other API? I want to get number of transaction every a minutes(or less than ten minutes). It's not one day total average. Thank you http://ift.tt/2k4UGPv

What causes quadratic hash problem? I read ScriptSig content during signature (quadratic hashing) discussing quadratic hash problem. Quadratic hash problem is the issue that signing (or verifying) transaction time grows with the square of the number of inputs (O(n^2) where n is the number of inputs). Why is that so? I reason the following: For each input you construct different template. O(n) This template must be double-SHA-hashed. - Double-SHA-hash duration is dependent linearly on the size of the template. Double hashed template (of fixed length) is then signed. - as the leght is fixed this step is of fixed duration As step 2 is dependent linearly on the size of the template, thus it is linearly dependent on the number of inputs, giving final time dependency relation O(n^2)? More precisely O(n^2+m) where m is the number of outputs (as this contributes in step 2)? http://ift.tt/2BtRtgN

calling importaddress with same address While experimenting with importing addresses and keys via json rpc I noticed that importing an address twice triggers two rescans. This strikes me as very odd. My question is: Is this intended behaviour and if so, what is the reasoning behind it? OR: Is this a bug? If so, is it a known bug? http://ift.tt/2BtRq4B

How to get bitcoin address of any private key? calling bitcoin-cli dumpwallet returns wallet private keys and addresses. Example L34D2hAS9KBJQzJkHtmNt1bdSJ18cQUvfSnJEqPKH2oUj6sBxvXt 2017-11-23T05:11:13Z reserve=1 # addr=1D2mnuj9qeRAzmw8mjLDciyvqzQiiYZCfE hdkeypath=m/0'/0'/1030' Importing this private key to wallet using importprivkey command returns null on success. How to get bitcoin address related to this private key? or is there's any way get this private key details like balance or addresses? http://ift.tt/2k6rfge

Block.io set smaller fees? Is it possible to set a custom transaction fee with block.io? We are using their API and their "Low" fee is still far too high (currently $3) http://ift.tt/2BtM7ly

How to develop and then sell my own Bitcoin Hardware Wallet? Okay so basically I have a good idea for a bitcoin hardware wallet, i'm just looking for information on how to go about creating it? Do I need to create my own programs/programming for literally everything? Are there open source type things I can use? Would it be illegal to use another wallets programming or whatever? I'm just really confused as to how all of this works out. I'm not the engineer involved with the product, I'm on the finance and business side of things. So forgive me if I sound dumb! Basically, what all can I use that currently exists to make this process as simple as possible without getting any law suits lol. Thanks so much! http://ift.tt/2k64A3F

Is Bitcoin trading anonymous and untraceable? I know little about bitcoin except they are digital currency. I heard that bitcoin ownership or exchanges/trading is anonymous and untraceable by government. Is that true? If I buy a bitcoin and pay by credit card, the money goes through banking system right? That would make it traceable wouldn't it? Thanks in advance. http://ift.tt/2jrMDsa

sent Bitcoins to Bitcoin cash account [duplicate] This question already has an answer here: Accidentally sent Bitcoin Cash to Bitcoin address 2 answers Totally rookie here..and panicking. My first transaction was using Block Chain wallet and sent bitcoins to KRACKEN and chose BITcoin cash as the currency. The transaction is listed as confirmed but "unspent" . Not getting any help from the support desks from either businesses. Can someone please advise, on steps I should take. Thanks http://ift.tt/2iXJWz8

Why is the mining fee so high? I recently bought $15 CAD worth of bitcoin from an bitcoin ATM nearby, only to receive $5.87 CAD worth of bitcoin(0.00047179BTC). I am assuming this is because of the miners fee. Why is it getting so high? Will it eventually drop? In total I payed a over 50% in miners fees. http://ift.tt/2iYQ1LO

Is having a copy of my wallet.dat file enough to recover lost Bitcoin? I have been using Bitcoin-qt to mine bitcoin. I am a little worried about losing my coins on my computer, so I have made a backup of my wallet.dat file and put it somewhere safe. Is this the right way to keep my coins safe from my computer crashing? Am I completely on the wrong track? What else might I need? I haven't encrypted my wallet. http://ift.tt/2Bjqtj1

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What is a my bitcoin address What is my bitcoin address, so i can give it to degorrilla it. So i can get paid. Where do i find it on the app. Ive looked through your app and cannot find it. This is very aggravating and im bout to just use paypal http://ift.tt/2hXpP3k

Integrate Bitcoin node RPC with website API I am currently using block.io however with their "low" tag fee transactions are still $2+ and they do not offer a way to set custom withdraw fees in their API. I'm not too sure what my options are but I want to look into setting up my own Bitcoin node/wallet on an external server that we can integrate with our dashboard. I have a few questions: 1) How would I go about doing it? 2) How many hours would it take for someone with limited experiance? (I will probably be paying someone) 3) Right now block.io is nice because we have unlimited addresses I presume this wont be a problem with the RPC server? http://ift.tt/2jrk9Pq

What are the rev00000.dat files? I've created an application with bitcoinj that extracts all addresses which have been used out of the block chain files created by bitcoin-core. I'm extracting the transactions only out of the blk*.dat files. Do these files really contain any transactions or are there further transaction in the rev*.dat files? What does the rev*.dat files contain? http://ift.tt/2hXpNZg

Bitcoin Stolen from Wallet, where do I stand? I had 4 coins on an old laptop and went to move them to a new wallet only to find out they had all been removed and sent elsewhere in 2014. To: 1KM6rLnwgD67wRdMx9aVLRf1gfoNyCyv7Q Debit: -3.93584800 BTC This was to buy a house for me and my family and now my balance is at 0, i'm devastated but pretty sure there is nothing that can be done about this, just asking here in case I've overlooked something, any advice welcome, thanks http://ift.tt/2jt78Vh

A simple PoW-PoS hybrid Are there already coins which use a proof-of-X construction where the mining is done by proof-of-work by the coin owners and the difficulty of the mining exercise depends on the amount of coins you possess? How do you call this construction and why isn't it the usual construction? http://ift.tt/2hXpMVc

Help please recovering a wallet 4 years ago I bought bitcoin and I have a 17 word mnemonic phrase an identifier a bitcoin address and what I believe is a password Does anyone know how I can access this bitcoin? http://ift.tt/2jr3xXW

Is a wallet simply a folder of private keys? I try to understand how a wallet actually works. I know there are lots of resources around the internet, but I still can't find simple and concise answers for basic questions about wallets and private keys. How does a Ledger Nano S work? Is it simply a wallet? Is a wallet simply a folder/directory containing a number (1 or more) of private keys, each able to generate a public address? I imagine an entire wallet as a simple text file with a number of lines, each containing a private key (plus some functionality to see the number of coins sent to the public addresses associated with the private keys). What ensures that a private key, generated in a wallet, is compatible with, for instance, the Bitcoin blockchain? According to my understanding, a private key is simply an encrypted integer value. Shouldn't this encrypted integer value be registered in the Bitcoin blockchain, ensuring it's valid and all other wallets are a

Is BitPie Safe? It is not listed on bitcoincash.org or bitcoingold.org I was utilizing Bither and have my Bitcoins there. I had my addresses there when the forks for Cash and Gold occurred. I successfully got my BitcoinCash and BitcoinGold on BitPie. Should i leave it with BitPie? There is LITTLE information about BitPie, and it makes me a little nervous that they are not listed on the BitCoinCash.org and BitCoinGold.org websites as wallets for their coin. I would love to have my coins as secure as possible, but unfortunately, i do not have the internet access to allow for running the FULL core platforms. Thank YOU. http://ift.tt/2jtesk2

If a single private key of the HD bitcoin account is compromised, is the whole HD account compromised? The subject pretty much asks it all. I asked the same question on the Mycelium web site but did not get an answer. An HD account can have multiple private keys. If one of the previous private keys gets compromised (falls into hands of a hacker) and this private key has no bitcoins assigned to it. Would the hacker be able to re-create subsequent private keys based on this single one private key? The question applies to Mycelium and all other HD accounts. Also, is there a standardized way how private keys are created or each wallet does it on its own? This question is important to me since we see more and more bitcoin forks. To claim newly forked bitcoins I would need to import private key(s) into another wallet. Assuming the new wallet may be used to harvest my private keys and to spend bitcoins, I would like to move my bitcoins from my HD account from private_key1->public_key1-&g

Safely generating Bitcoin paper wallets I'm new to Bitcoin and I have recently purchased a few fractions of Bitcoin. My BTC are stored on what I understand is an online wallet (a website where I log in using two-factor authentication and where I can buy/sell BTC as well as send/receive BTC). The problem is that my BTC are stored online, which means that they could be potentially exposed to threats like hackers, viruses, technical problems, the website going down, fraud, etc. So, after having searched for other options, I decided that the most secure way of storing BTC would be on a paper wallet. Creating a paper wallet at bitaddress.org doesn't seem to be that difficult, but of course one has to be sure that the public and private keys are being generated in a completely safe, malware-free environment. Many advanced users employ what are to me very complicated techniques for generating such keys, such as booting the operating system from a pendrive, using Ubuntu, Tails and man

Recover Bitcoin From Transaction ID Back in 2013 I bought some bitcoin for a relatively low price, and stored them in an Electrum wallet on my PC. However, I changed PCs a year or two later, and forgot to copy the bitcoin wallet over. Given the current soaring price, I now have a renewed interest in trying to recover these seemingly lost bitcoins. I took a screenshot of the blockchain.info page that was displayed shortly after the transaction was completed. I believe this shows the transaction ID, plus the wallet Id it was transferred to. Here's an edited version of the page I screenshotted, obviously with the IDs hidden so no-one else steals them :) I've tried revisiting this website, based on the previous URL, which I believe was the transaction Id. I receive an error: Invalid Transaction Hash Now, obviously bitcoin has split in two, and this was pre-split. So, what are the various values that are shown on the screenshot (top left appears to be transaction id, bottom r

Is there a way to predict somehow the required storage for a specific blockchain? I'd like to store a blockchain or two in my computer. Blockchains are pretty heavy (I took over 3hs to download GameCredits blockchain, and is one of the smallest blockchains, I guess). My main fear is to not be able to keep using my pc to store the blockchain (e.g. this applies for others like Litecoin). Is there a way to track current blockchain storage sizes and predict how much space will I need the next one or two years? http://ift.tt/2AaFmqP

Bitcoin's change back I'm starting a new project that uses bitcoin. I'm afraid some feature can't be done, or aren't safe. I'd like to validate some ideas: I'll create a wallet/address and publish it on the project's website. All customers are supposed to pay/transfer BTCs to the same address (identify the payment is not a problem). Eventually, I'll need to refund a customer. 1) Is it safe to refund the customer using the same address he/she used to pay me? 2) Can I continue using the same address for receiving BTCs after a refound? I know that, when you send money to another address, the change back is sent to another address (still yours). 3) Can I send a % of a wallet to an address and the remaining/change back to a new address (totally different wallet/private key) in the same transaction. http://ift.tt/2AaTGiR

Dynamic Transaction Hash Confirmation I am working on a donation based community website (using PHP) where participants register for an account to participate. Each account carries the participant's bitcoin address. A participant makes a commitment to donate say $10 and is paired with another participant (recipient). The donor confirms payment by pasting his/her Transaction hash id on his dashboard to confirm payments. I currently use Blockchain.info API to read the transaction details and check the inputs and outputs of the transaction to ensure that they contain both donor and recipient BTC addresses and the expected amount. My problem is that most wallet providers generate new BTC address after each transaction making it difficult for my code to confirm transaction as the address will not match if new ones are generated. How do I confirm transactions for dynamic BTC addresses using PHP OR how would you handle this use case? Thanks http://ift.tt/2n8FBgV

Duplex micropayment channels: criticisms of Lightning and implementation A paper from 2015 by Decker and Wattenhofer proposes an interesting design for a payment channel network, which differs from the Lightning network. The authors claim in the Related work section that Lightning: "requires exchanging keying material for each update in the channels, which results in either massive storage or computational requirements", and "cannot be decomposed into smaller units that can be analyzed in isolation, making the security analysis difficult and resulting in complex implementations". I have two questions: To what extent are those criticisms of Lightning valid as of November 2017? Is there an implementation of Duplex micropayment channels or at least plans to create one? http://ift.tt/2A8RLvj

Transfer coinbase cryptos to another wallet I am unable to transfer my Coinbase bitcoin to an exodus wallet. Can anybody help? http://ift.tt/2hVZBhm

Possible to speed up reindex? I just reindexed a node that was already synced (in order to enable txindex); it took around 9 hours. It's on a pretty good system: 16G RAM, i7 with 4 physical cores. Storage is a weak point, with LUKS on software RAID0 on spinning disks. dbcache is at the default 100M, though I'm running 0.11 so I gather this ends up smaller than the previous default due to more accurate accounting. By extrapolation from testing a subset, a sequential read of the full ~38G of blk files should take ~4 minutes. I understand reindex includes rebuilding the chainstate db, so I'm guessing that's the bottleneck. Questions: 1) reindex doesn't also re-validate blocks, does it? 2) Any experience with speeding this up -- perhaps putting chainstate on a tmpfs and copying to permanent storage once complete? Followup: by increasing dbcache as suggested, and adding a recent custom checkpoint to the code, I got another reindex done in about 3 hours. http://ift.tt/

Tokenising AR/VR with Blockchain: GazeCoin Tokensale Comes Near Gazecoin, an Ethereum based blockchain stage has authoritatively declared its ICO on Dec 10th 2017, Gazecoin (GZE token). http://ift.tt/2Bs4gA8

Rentberry – the Modern Approach to Long-Term Renting Rentberry was founded in 2015 and has achieved great success in the blockchain industry so far. Rentberry successfully raised $4M from high-profile investors and VC funds from 11 countries and 19 US states. Currently, the platform operates all across the US and has more than 120k users and 224k properties. The company has plans to expand to Europe and Asia in the next few years. http://ift.tt/2hYdBHn

November 28, 2017 – the Official Start of the Token Sale of the First «Kosher» (Jewish) Crypto-Token and Blockchain Ecosystem BitCoen.io British company BitCoen is opening up an international blockchain market. The company declared about its strategic goal – to help interaction between representatives of the Jewish communities around the world. The BitCoen ecosystem is a system of services, qualitatively improving the life of the Jewish community. http://ift.tt/2A9x8iP

What happens an order and offer are matched but there is a significant gap between them? I wonder the implications of the following scenario. Let's assume I offered one coin with the price 1k (by mistake or for experiment), while the highest order in the market is 2k. What are the prices I'm going to pay and the matching order is going to receive. How would this affect the current price of the market? Thanks http://ift.tt/2hV6wr4

How to sign an OP_RETURN transaction with BitcoinJ I want to create and sign an OP_RETURN transaction and broadcasting to my Regtest network. I face up two problems: First: I have created successfully the transaction output but how to sign and broadcast my transaction to the regtest network? Here is my code for creating the output: public TransactionOutput createOpReturnTransaction(org.bitcoinj.core.Transaction tx, ScriptBuilder sb) { String myData = Main.resultHash; byte[] sha256 = org.apache.commons.codec.digest.DigestUtils .sha256(myData); myScript = sb.op(ScriptOpCodes.OP_RETURN).data(sha256).build(); TransactionOutput transactionOutput = tx.addOutput( org.bitcoinj.core.Transaction.MIN_NONDUST_OUTPUT, myScript); System.out.println("My script is :" + myScript); System.out.println("My transaction output is : " + transactionOutput); System.out .println("The size of my message after hashin

How to predict value of bitcoin I was just thinking if its possible to predict bitcoin value. If so, what would be the parameters. http://ift.tt/2hX2dMf

BTC Hash-Rate API I'd like to get hash-rate of BTC from OKcoin' API(GET /api/v1/charts/:type) here is OKCoin's API web site. How can I get information from here is OKCoin's API web site. python gets = requests.get("http://ift.tt/2jrorGp") gets.json() OUT {'error_code': 10010, 'result': False} http://ift.tt/2Aa6ZQB

usdt integration with omnicore? We need to integrate the usdt on our trading site. For this we try with the omnicore. Now we installed the omnicore and its working fine(We can check with bitcoin) but we don't know how it work with usdt? In getbalance section we saw the property id, address as the parameter so is there any property id for usdt? We are new to omnicore so anyone give brief explanation it will help full Awaiting for your valuable response Thanks in advance http://ift.tt/2jpleao

How BitcoinJS sync bitcoin blockchain/transaction data? I see the reference code in BitcoinJS website about 'Creating a Transaction': var tx = new bitcoin.TransactionBuilder() // Add the input (who is paying): // [previous transaction hash, index of the output to use] var txId = 'aa94ab02c182214f090e99a0d57021caffd0f195a81c24602b1028b130b63e31' tx.addInput(txId, 0) My question is how it get the data about tx(like its inputs/outputs)? Does it link to some nodes or API like blockchain.info? http://ift.tt/2AhtbGN

Blockchain.info testnet websocket doesn't work When I try to connect testnet websocket provided by blockchain.info api. Connection doesn't establish, when i looked into the code. It says for testnet it uses "wss://ws.testnet.blockchain.info/inv" url. I guess that blockchain.info stops the service for testnet. Is there any other websocket api provider for bitcoin testnet? http://ift.tt/2jp0WOa

Altcoin creation - Why did consensus.hashGenesisBlock assertion fail? I am creating an Altcoin for a university research project, and I have been stuck on this problem for a long time! I have created my genesis block in chainparams.cpp and have added my hash to assert(consensus.hashGenesisBlock == uint256S("0x00006fb140260f8b7f1961f912c356e247f9819c337461f86a34d7380888c6ea")); assert(genesis.hashMerkleRoot == uint256S("0xdf9006ed9733ba750c8fe379ec1ec922249730398dd5bde15ff55dd0c3c50be0")); Now when I make install the program, Bitcoin-QT runs successfully, no assertion errors occur and the GUI opens up! However, if I comment out the consensus.hashGenesisBlock = genesis.GetHash(); function, it throws an assertion error . GELF-qt: chainparams.cpp:136: CMainParams::CMainParams(): Assertion consensus.hashGenesisBlock == uint256S("0x0000381de01e7ca10934a6e5d98b6886b4a44bfc488fbe9b75dafb932c462282") failed. Once I have mined the genesis block, am I right to

How it is possible to create coins only with the proof of stake system? Nick Szabo comes 2011 with a alternative proof system wich he calls proof of stake POS. This system was used later by varios coins ( NXT, Peercoin, Blackcoin etc.) but all of them had the genesis coins premined or have them created in the beginning with the proof of work system. But how it would be possible to create coins only with the proof of stake system from the beginning ? http://ift.tt/2AbVrfX

UTXO model vs. account/balance model I understand that Bitcoin uses unspent tx output and Ethereum account balance based. However, recently there are lots of discussions on that Bitcoin's UTXO database has become too big. Does this mean account balance based transactions are better in scaling than UTXO based? http://ift.tt/2hTJvF1

How can I get started in my own computer using Gamecredits Core for Windows? I am using Gamecredits. I installed the node software loccally and synced all the content. However, no helpfile seems to come with the software and I don't know how to start. I am quite new to this world of blockchains. Could you point please to an official documentation regarding the CLI? I'm somehow struggling with the QT version, but perhaps learning to use the CLI could be useful to build a web interface of my own. I would like to, sooner or later, use it as integrated in a game of my own, but I don't know how to start. http://ift.tt/2BcSFEn

how to configue multiple miners on a single network laptop/router? I have 2 S9's, a router and laptop. Question: do the S9's have separate IP addresses or just one network IP for both miners? I realize this sounds stupid, however, I cant figure out how to apply 2 IP addresses to the Bitmain s/w set up. All the set up examples only show 1 miner. Thank you so much, Bill http://ift.tt/2iSWvf6

How to spend from the &quot;master_private_key&quot;: “df484533kf5mzv83892a234a44ae9z83m832987a82mqwmdkks018121204v95las9&quot; I made a backup of an outdated command line interface BTC wallet, here is an example: "master_private_key": “df484533kf5mzv83892a234a44ae9z83m832987a82mqwmdkks018121204v95las9" How can I import this key into another wallet? http://ift.tt/2zHybHz

Why is scriptSig filled with scriptPubKey before signing a transaction? I'm checking the transaction signing as described here Redeeming a raw transaction step by step example required . What is the reason for steps 5 and 6: temporarily filling scriptSig with scriptPubKey of the output we want to redeem? Can't this just be skipped, as with txid and output index we uniquely specify the output thus scriptPubKey and we don't get any value with this filling? http://ift.tt/2BeSHeT

How does it work? Ok so I get a deposit via bitcoin then how and where do I get the usd cash in my hand? I want to receive bitcoin for a transfer to get cash owed to me. Any advice please. http://ift.tt/2n8ds9I

Trying to compile a cypto wallet with gitian getting error qemu-i Hi so a am trying to compile a wallet for a cryptocurrency using gitian on a vps. Down below is all of my command history i can get. Here is were the error is. itian@smartcash-compile:~/gitian-builder$ ./bin/gbuild --commit smartcash=1.0.1 ../smartcash/contrib/gitian-descriptors/gitian-linux.yml Initialized empty Git repository in /home/gitian/gitian-builder/inputs/smartcash/.git/ remote: Counting objects: 5472, done. remote: Compressing objects: 100% (10/10), done. remote: Total 5472 (delta 2), reused 1 (delta 0), pack-reused 5462 Receiving objects: 100% (5472/5472), 57.43 MiB | 12.60 MiB/s, done. Resolving deltas: 100% (2703/2703), done. From http://ift.tt/2BcStVF * [new tag] 0.8.7.10 -> 0.8.7.10 * [new tag] 0.8.7.10_exchange -> 0.8.7.10_exchange * [new tag] 0.8.7.10e -> 0.8.7.10e * [new tag] 0.8.7.13 -> 0.8.7.13 * [new tag] 0.8.7.9 -> 0.8.7.9 * [ne