All Questions

5
votes
0answers
103 views

19 out of 24 words of BIP39 passphrase (brute-force last 5?)

I have managed to lose 5 words of my 24 word Ledger Nano S recovery phrase. I have words 1-19 but I am missing words 20-24. I have significant holdings on the wallet so would very much like to recover ...
5
votes
0answers
121 views

Did the introduction of VerifyScript cause a backwards incompatible change to consensus?

My question is about the changes to bitcoin done by commit range [a75560d8, 6ff5f718], and their effect on consensus. Out of this range of four commits (all attributed to satoshi) during the dates ...
5
votes
0answers
268 views

BTCJam API 500 errors

I am currently trying to set up an application using the BTCJam api. I think the api could be very useful, but I have been unable to get it to work fully, and since support isn't responding, I thought ...
4
votes
0answers
50 views

Why did the lightning network implement a gossip protocol?

As pointed out by many lightning developers in the past (eg Rustys 1 million channel challenge) the gossip protocol is quite noisy and a part of the BOLTs producing many engineering challenges. Today ...
4
votes
0answers
614 views

To sign raw transaction in Segwit

I am using Bitcoin core 0.14.1 testnet. I created a Segwit address. transfer some coins to this address. Now I want to spend it. I created a raw transaction using console command i.e. ...
4
votes
0answers
400 views

Good way to test Electrumx?

Has anyone else gotten an electrumx server up and running lately? I have just gotten to the point where I'm not seeing any errors during "# service electrumx status", but I'm also not seeing my ...
4
votes
0answers
3k views

Electrum transaction still says unconfirmed parent

A transaction from Electrum is still showing unconfirmed parent even though the previous transaction in the chain has completed. Electrum has shown this for 24 hours now. I realize that my fee is ...
4
votes
0answers
347 views

How to Use TransactionBuilder in NBitcoin

I have used this code. It returns a success, but does not send bitcoin. var txRepo = new NoSqlTransactionRepository(); // Let’s me introduce you, Alice, Bob, Satoshi, and Nico with their ...
4
votes
0answers
414 views

Bitcoinj: How to fix error “You should use Context.propagate() or a ContextPropagatingThreadFactory”

I'm using bitcoinj from a Scala application... and when I start it, I always get the following errors: [error] o.b.c.Context - Performing thread fixup: you are accessing bitcoinj via a thread that ...
4
votes
0answers
2k views

publicly available json-rpc node for bitcoin-cli connection

There is a service provided by blockchain.info described on json_rpc_api page. More or less it describes the API that user can use to access their blockchain similar way as using bitcoin-cli to own ...
4
votes
0answers
2k views

Complete list of merged mineable coins? SHA256 + Scrypt

mmpool.org mines these SHA256 PoW coins: Bitcoin Namecoin Ixcoin Devcoin I0coin Groupcoin https://en.bitcoin.it/wiki/Merged_mining_specification claims that it is only used by Namecoin Is there a ...
4
votes
0answers
6k views

BFGMiner + CGMiner solo mining, how to specify payout address

I am currently trying my luck at solo mining a few types of crypto-currencies. My question is why does BFGMiner require a --coinbase-addr- argument for solo mining to know where to payout rewards to ...
3
votes
0answers
70 views

Bitcoind 0.5.3 stuck at block 364,670 - what to do?

I compiled bitcoind using the same steps as last year. In particular I set DB_CONFIG: set_lg_dir database set_lk_max_locks 537000 Unfortunately once I hit block 364,670 (2015-07-10) I'm treated with:...
3
votes
0answers
63 views

Obtaining historical orphaned blocks (chaintips) without old node

I'm attempting to do some research surrounding orphaned blocks within the Bitcoin network. From my understanding the best and really only way to obtain data for blocks that no longer exist in the main ...
3
votes
0answers
137 views

Python library for Multisignature HD wallets

Is there is any python library is available that allow creation of Multisignature HD wallets ?
3
votes
0answers
188 views

How does Proof of Stake prevents dishonest behaviour compared to PoW?

I know that in Proof of Work (PoW) once a node has found the solution (the nonce) they announce it to the network. Then the rest of the nodes can easily verify the correctness of the block hash and ...
3
votes
0answers
257 views

HD Wallets - Generating P2SH-P2WSH Addresses from a ypub-type mpks in PHP?

I am writing a webapp in PHP that needs to generate Bitcoin addresses from their mpk. I have successfully done it for P2SH addresses (starting with a 1, with a xpub mpk) using the BitWasp php library,...
3
votes
0answers
370 views

Electrum Seed Purpose for MultiSig Wallet

I'm curious as to what exactly is protected by the seed that Electrum generates for a multisig wallet. My knowledge of the protocol implementation is rather basic, so please correct me where I'm wrong ...
3
votes
0answers
168 views

ZMQ Raw TX doesn't include all transactions

I'm running a Bitcore.io node and using their ZMQ hook but I've noticed that on livenet not all transactions are actually being sent. I've been comparing it to https://blockchain.info/unconfirmed-...
3
votes
0answers
726 views

How to directly query leveldb database to get get a record by transaction hash or by sender's address?

I learned that the blocks and transactions are stored locally in .bitcoin/blocks/index and .bitcoin/chainstate databases, respectively. I want to make a direct query to those databases to measure the ...
3
votes
0answers
275 views

Transferring wallet.dat from PC to Raspberry PI

I have the Stratis QT sofware running on my computer. I also have a working version of stratisd running on a raspberry pi, which I set up following this tutorial If I try to swap my wallet.dat on my ...
3
votes
0answers
339 views

Bitcoin core accounts deprecated, now what system i implement to make use of accounts?

I am designing one of the bitcoin based app on Bitcoin core using account system. Accounts i have used to store users wallet balance in different accounts. But since i know it is deprecated, then ...
3
votes
0answers
347 views

Scrypt CPU miner supporting segregated witness (for Litecoin testnet4)

I am interested in CPU mining on the Litecoin testnet (testnet4); the difficulty level is currently low enough to make this feasible. The standard Litecoin client no longer supports CPU mining. The ...
3
votes
0answers
1k views

How to choose between so many open-source bitcoin pool software

I am now in the venture of finding and setting up a bitcoin pool company. However, after some research, I found out that there are plenty of bitcoin pool software. There are: CoiniumServ Cryptonote ...
3
votes
0answers
118 views

Installing QBitNinja locally

I am wondering if you found a solution on: How to run QBitNinja Server locally?
3
votes
0answers
4k views

bitcoin-cli - “error: couldn't connect to server” [solved as per comment]

I have bitcoind 0.13.1 running on a Raspberry Pi. I can see it on the bitcoin network using bitnodes.21.co but I can't connect to it locally with bitcoin-cli. My bitcoin.conf is: rpcuser=xxx ...
3
votes
0answers
361 views

How to avoid rebroadcasting a transaction that is pending?

I'm using MultiBit Classic, and one of my transactions is stuck due to too low fees. The main problem is that I have my change amount blocked until this TX goes through. I understand that I should ...
3
votes
0answers
73 views

Why is my node being flooded with bitcoinj clients from 138.197.0.0/16?

I'm not the only one to have noticed this (discussions on reddit here and here): out of 70 or 80 incoming connections on my bitcoin core full node, about 50 are from just one single network (138.197.0....
3
votes
0answers
2k views

How can I fix an unconfirmed low-fee transaction sent from Multibit HD?

I have tried researching this issue for hours. I do not think the majority of usual solutions are possible with Multibit HD. The only solution I believe I do not fully understand (and therefore it may ...
3
votes
0answers
55 views

What does the Payment Hub learn about its users in TumbleBit?

When a user participates in transactions on a TumbleBit payment hub, what does the payment hub learn about the user's transactions?
3
votes
0answers
153 views

How does schnorr signature construct multisig functionality?

How does the multiparty schnorr signature work and enable multisig functionality in Bitcoin? What are its limitations? Can we construct any m of n signature? Is there anyway to hide the signers among ...
3
votes
0answers
457 views

How can I store a redeem script in my wallet?

Imagine that I wrote a redeem script. I calculated the related P2SH address, and sent some bitcoins to that address. In order to spend that bitcoins, I need to remember two things: The private keys ...
3
votes
0answers
556 views

Mempool filled with 14KB transactions, tons of inputs, 0.15 mBTC fee

With the blockchain experiencing extremely high transaction volumes (most blocks at the 1MB size limit), I am interested in studying the "backlog" of transactions in the memory pool on my own full ...
3
votes
0answers
89 views

Whisper Implementation in Bitcoin

Is there some kind of implementation in bitcoin to communicate between nodes, which is similar to the Whisper Communication in Ethereum ? Whisper, is a communication protocol for DApps to communicate ...
3
votes
0answers
91 views

Claim or Refund Functionality Implementation in Bitcoin

I was reading the paper written by Kuramesan and Bentov with title "How to use Bitcoin to Design Fair Protocols". Source: https://eprint.iacr.org/2014/129.pdf Specifically, the sender creates a ...
3
votes
0answers
350 views

How can I recover last word of BIP-32/39 mnemonic copay second signature multisig wallet

I've got a multisig 2of2 wallet in copay. I've one wallet correct but have lost second wallet and only have 11 of the 12 words of the seed.I'm pretty sure I miss the last one. I've got some of the ...
3
votes
0answers
483 views

./learncoind not connecting to DigitalOcean Droplet

I'm on video 5 of the Learncoin youtube series and I am getting an error when I try to run ./learncoind 2016-04-07 03:40:40 connect() failed after select(): Connection refused 2016-04-07 03:40:40 ...
3
votes
0answers
144 views

What is meant by getnetworkinfo: networks: reachable = false

What do all the reachable: false's mean under each network? My node is connecting fine to other peers both in and out, I assume via IPv4 (since I didn't configure anything else special). Is my node ...
3
votes
0answers
435 views

Verification progress decreasing when validating genesis block

I've been experimenting with the litecoin source and have decided to make my own token network for personal use. I've mined my own genesis block, and assigned unique identifiers for base58Prefix and ...
3
votes
0answers
507 views

Blockchain.info may have created a bad private key

A few weeks back, a client wanted to pay me in bitcoin so I created an account at blockchain.info. The transaction went through and the coins show in my account. When I tried to use it however, I ...
3
votes
0answers
438 views

Creation of P2SH MultiSig Input Script

In the createP2SHMultiSigInputScript() function of BitcoinJ according to this: public static Script createP2SHMultiSigInputScript(@NullableList signatures,Script multisigProgram) Create a program ...
3
votes
0answers
440 views

Environment for building Bitcoin core in Windows

I'd like to try building the Bitcoin core source in Windows. The instructive materials I've found take too much for granted. What environment needs to be installed before building? Can it be built in ...
3
votes
0answers
45 views

Bitcoin-based Distributed Donation Systems, whichs do you know?

I've heard that Tor Project constructed such system: Everybody who are participating in the Tor Network, creating Exit Node or even Middle Node, would simply paste his Bitcoin address into the "...
3
votes
0answers
109 views

Any Innovations in altcoin tech for Bitcoin’s Script language?

Bitcoin’s Script is the forth-like, non-Turing complete language used for transactions. However, in practice, a very limited number of kinds of scripts are allowed, a number of opcodes have been ...
3
votes
0answers
150 views

Unable to limit tcp bandwidth using tc in QoS for localhost

I am trying to connect few bitcoind instance running on different ports on my local machine and control the bandwidth between those connections. I used the tc utility as following: #network interface ...
3
votes
0answers
352 views

Cannot obtain a lock - Already deleted lock file

I am trying to open Bitcoin Core of "Cannot obtain a lock on C:User/App..." I deleted the lock. file like previously suggested but cannot find a solution after that! If I reinstall will I loose the ...
3
votes
0answers
477 views

blockchain - Anti-virus service

I hope this is the right place to ask a question on how does block-chain help this theoretical requirement. I have also asked this question on SO; so far, no response. And, Ethereum SE is still in ...
3
votes
0answers
320 views

bitcoin:uri for sending payments to multiple addresses

Lets say I want a donate bitcoin button/QR code to send to multiple recipients in different ratios. As in send 50% to wallet 1. Send 25% to wallet 2. Send 25% to wallet 3. Is there any way to do ...
3
votes
0answers
242 views

Electrum - Why do I have to Restore every time I use it?

I did not forget my password. I have been done dozens of transactions with Electrum, and every time I try to send bitcoins, I get "Invalid Password". So I restore from seed, set a new password, use it ...
3
votes
0answers
52 views

Syncronization time jumps up to 8 days, then down again

I'm relatively new to using the litecoin software. I watched the local copy of the blockchain build all the way down to two days. Suddenly, it jumped back up to 8 days, and then built all the way ...

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