All Questions

0
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0answers
5 views

What types of “Game Theory” are more involved in the blockchain consensus?

The blockchain consensus seems to be very related to the Game Theory, when each participant tries to achieve their "favorites", where defining "what favorites means" is not very easy, since a ...
1
vote
0answers
5 views

Is it posible to create a transaction output that can either be reddemed by privK of Addr A or by privK of Addr B AFTER certain blockheight?

I am thinking about how to secure your Bitcoin savings. One idea I had was to create sort of a "backup" address B for an address A which stores the bitcoins. So what I want to achieve is that you ...
1
vote
1answer
7 views

I am web developer, can i use my working pc to mine and work at same time?

Guyz, i am a web developer, i have single pc but i am thinking to add a good GPU in it, my question is that if i add good GPU, will i be able to mine crypto currencies like BTC/ETH and work on my pc ...
0
votes
1answer
16 views

How to recover bitcoins from personal wallet app in android which is uninstalled?

I am using a bitcoin Non-deterministic wallet created by a private firm. In which there are few bitcoins worth 100$ Somehow I clear data of the android App, and Now all the memories related to my ...
-1
votes
0answers
9 views

I was threatened

I am not dealing with Bitcoin. I received the following e-mail. ” I am well aware XXXXXX one of your password. Lets get straight to purpose. You do not know me and you're probably wondering why you ...
1
vote
0answers
9 views

How does copying main stack prevent malformed unlocking scripts vulnerabilities?

https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch06.asciidoc In the original bitcoin client, the unlocking and locking scripts were concatenated and executed in sequence. For security ...
1
vote
1answer
12 views

What would happen if I publish a modified version of an earlier block? Would it be rejected immediately by peer nodes?

I am reading the book "Mastering Bitcoin" and have finished reading Chapter 2 and 10, but I still don't find the answer. Suppose the current main chain has 5 blocks: B0 <- B1 <- B2 <- B3 &...
0
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0answers
11 views

why is bitcoin leveldb separated in so many small pieces?

Currently I could see 1418 ldb files on my box, from 210040.ldb to 215423.ldb (some missing). Why are they separated in this way? I want to read the leveldb using golang, but I don't know which one ...
0
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0answers
13 views

What happened to Bitcoin Classic transactions when Bitcoin Classic shut down?

We can read the following: People that run Bitcoin Classic are urged to migrate to any of the alternative wallets or nodes. And I am serious about this because the recent versions of Bitcoin ...
0
votes
1answer
11 views

How difficulty impact profitability? what is the formula?

I have antminer s9 , I visit this , but I wanna know how difficulty impact my profitability in the future ? and estimate break even cost ?
0
votes
1answer
33 views

Is it possible to write a script, which can allow spend only own inputs except all of them?

Let's imagine: We have just one BTC address. Users send some coins to this shared address. And can spend only own inputs. P.S. If someone can provide some example script for this I'll be very ...
0
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0answers
9 views

How does one confirm if my dbcache setting has taken affect via the gui for bitcoin core 0.17?

I set dbcache=4000 in my bitcoin.conf file, but where can one confirm if this took affect or not in the gui? I'm on ubuntu 18.
1
vote
1answer
23 views

Have there been any examples of people manipulating transactions in a way that waiting for more than 1 confirmation would avoid?

A lot of bitcoin exchanges require some minimum amount of confirmations before they consider money deposited. Is there any evidence that this actually does anything? Has someone ever before ...
0
votes
1answer
15 views

Is it safe to store user's secure pass-code in database with encrypted form while creating bitcoin wallet?

I would like to create a Bitcoin Wallet. Part of the process is to store public and private keys in encrypted form in server database. All keys I am storing is encrypted using user's passcode. 1) ...
0
votes
1answer
18 views

Why lightweight nodes are less secure?

as you know there is two main type of wallets: full node and light node I've read in some advice that just using full node for more security stuff and the next question is what is the type of ...
0
votes
1answer
19 views

Send and Receive BTC with Same Address from 1 Person

Is it possible to : I sent BTC to A from Address1 and I asked him to send me BTC (different amount as I send him) to Address1 (same address with I sent him before)..?
1
vote
0answers
9 views

Keep getting Trgval? no (false positive; hash > target),

Yes, I am a Noob. Getting acquainted with bitmining before I move up to big rigs investments. Learning rig is a RPI 3 B+ with Bitmain ASIC eruptors. Using BDGminer and get connection and hashes with ...
0
votes
1answer
20 views

Signature generation

I am trying to unwrap bitcoin transaction generation process. A bit confused about signing part. My understanding is the transaction is sha256'd, then sha256'd one more time, then ECDSA'd. Based ...
0
votes
0answers
11 views

Miner quota settings doesn't work as expected

I'm using and antminer s9, with bmminer software. It is based on cgminer, and has an option for --load-balance strategy. If i understand correctly, what this strategy does, is it gets and sends ...
0
votes
0answers
7 views

What are the lowest fees for transparent and shielded Zcash transactions?

Currently, Monero transaction fees are an average of ~.00001 XMR for a private transaction. What are the fees for a Zcash transaction when doing a transparent transaction and a ztransaction for ...
0
votes
1answer
19 views

What API would I use to find the circulating supply of Ardor?

Is there a way to use API to find the circulating supply of Ardor or any of the child chain tokens?
1
vote
2answers
34 views

How to cheaply melt many micro UTXOs?

I know this was probably brought up before but I cannot find any good resources on some potential, at least theoretical way of achieving this. So basically I have a lot of UTXOs whose value is ...
-2
votes
0answers
10 views

How To Define New BUILD version for the new POS altCoin?

I had made new POS based altcoin for learning purpose, now i want to update it's version and build date which is right now showing to be that of the Okcash which i forked to make new POS based Altcoin....
0
votes
1answer
21 views

bitcoin compile (.undefined reference to **')

I'm getting error after make command like, undefined reference to `BlockAssembler::BlockAssembler(CChainParams const&)' and in last Makefile:774: recipe for target 'all-recursive' failed make:...
1
vote
2answers
36 views

Bitcoind does not like ECDSA (r, s) pair produced by OpenSSL

I am writing transactions manually and have stumbled across a rather bizarre situation. Only one in a few of the transactions I broadcast to bitcoind is accepted, otherwise I get a REJECT_NONSTANDARD ...
1
vote
2answers
25 views

Set up a Bitcoin full node: static or dynamic IP address?

I am trying to set up a new Bitcoin full node and my institution ISP is trying hard to not give me a static IP address for this purpose. I guess because of the concern that the node will be DDoSed, ...
0
votes
1answer
34 views

Lightning Network: what about tx fragmentation?

I really have no idea how to aks it right. Let me give an example: We have a some peoples A,B,C,D.... And A makes transaction to B, then A need to pay to C, then send some coins to D, etc... After ...
0
votes
0answers
10 views

How to use electrum RPC to get address balance on windows

$ ./electrum-3.2.3.exe --testnet setconfig rpcport 7777 true $ ./electrum-3.2.3.exe --testnet setconfig rpcuser blah true $ ./electrum-3.2.3.exe --testnet setconfig rpcpassword blah true $ ./electrum-...
0
votes
0answers
17 views

Unable to create a raw transaction from a segwit address

I'm using bitcoin core to handle receiving and sending btc on our payment system. The following is the abridged version of our script: bitcoin-cli importaddress 3PK472dtKHTrPus7TGvXVdV6EwvxAufgUj ...
1
vote
1answer
25 views

What does a double spend (CVE-2018-17144) look like if I gettransaction it?

Just wondering what the output from gettransaction (or should I be using getblock?) would look like if I passed it a txid(or blockhash) that contained a set of transactions that exploited the double ...
0
votes
2answers
39 views

Why can a wallet not compute the private-key from a public-key?

my goal of questions this is why any wallet not able to compute private key created with public key generate?
0
votes
1answer
13 views

Can't send the funds - encryption password forgotten. Copay

I know my 12 word phrase but can't remember the encryption password. What is the procedure to recover the wallet? How many times can I insert the encryption password wrong before my account gets ...
2
votes
1answer
16 views

BIP 44 is scanning external chain really enough?

When reading the BIP 44 proposal I stumbled upon this paragraph about address discovery: We scan just the external chains, because internal chains receive only coins that come from the associated ...
0
votes
1answer
24 views

Bitfinex get Trading Fees via API

After placing a market order, I got its order_id & checked its status via this end point /v1/order/status and I got the following: Array ( [id] => 18141116927 [cid] => 43611135723 [cid_date]...
0
votes
0answers
12 views

Use addresses generated by master public key (xmpk)

I am using electrum wallet and took from there extended master public key. Than using that xmpk I have generated addresses. Now I have sent some test coins and can not recieve in my electrum wallet. ...
0
votes
1answer
37 views

Is a 51% attack on bitcoin likely?

Given that the majority of bitcoin processing is done in China (source: https://bitcoinmagazine.com/articles/report-links-74-bitcoin-mining-china-sees-threat-network/), is it possible for a single ...
0
votes
0answers
14 views

How to get notify of unconfirmed transaction using bitcore node or bitcoin rpc?

I run a node on my own server ,and i am using the bus.on('bitcoind/addresstxid') event. When there is a new unconfirmed transaction that sent from an P2SH address, i don't get a notification on ...
0
votes
1answer
24 views

Bitcoin / Crypto and exchanges!

When we buy/ sell bitcoin through some exchange say "Koinex in Indian context", what is the process i.e. actually followed ? 1. Does exchange communicate to node(s) in the bitcoin blockchain thru my ...
0
votes
0answers
28 views

transfer money with php api

How can i transfer a money with php from one bitcoin wallet to another? I've search enough on stack, i know i can use third party api like blockchain.com api & block.io api , but they do not let ...
0
votes
1answer
17 views

Bitcoin-cli getbalance returning negative value

I am running: bitcoin-cli getbalance username 1 It is returning -37.01 How is it possible for an account to be negative? Is this a bug or do I need to add stricter security when performing a send to ...
0
votes
0answers
19 views

bitcore signature authentication similar to trezor connect

I'm trying to implement an authentication process similar trezor connect but i'm unsure what i'm doing wrong. I'm trying to validate the signature using the official implementation here: https://...
-2
votes
0answers
20 views

After genesis generation I am getting txout.nvalue negative

Have you encountered the error - "txout.nvalue negative" when trying to mine the first block using the command "setgenerate true". I am stuck over there. This is on a PIVX fork.
0
votes
0answers
48 views

non-spendable bitcoin in my btc wallet

i was scammed. he created my bitcoin wallet and he said he will put my earning from iqoption trading in it.i have my password of my wallet in which i change already...but the thing is my money appear ...
-2
votes
1answer
17 views

PoW/PoS/Masternode blockchain

After mining some blocks as premining and once POS is started, is it possible to stop the chain altogether (turning off all the nodes) and restart at some point in near future? From the technical ...
0
votes
1answer
21 views

I have Turkmenistan manat and I want to exchange it for usd

I have a turkmenistan manat on my bank account. UNfortunatelly, that bank doesn't give me a credit card for it. THey just opened an account and put my turkmenistan manat on there. What should I do to ...
0
votes
1answer
19 views

gettransaction cannot get address where it send from

Hi i have test few time with gettransaction method, it seem only show full detail about transaction when send inside node. But if i send from another address outside my node, gettransaction only show ...
0
votes
1answer
15 views

Online trading testing sandbox for Bittrex

Is there any testing Sandbox for Bitrrex? How can I obtain the test bitcoin and purchase the ETH? Please advice.
-1
votes
0answers
12 views

Change litecoin decimals

I am making an altcoin from Litecoin. I am following this tutorial and successfully made an altcoin. https://www.youtube.com/watch?v=mDGxGYvkDEE But I have some doubts. Suppose I am making a coin ...
0
votes
0answers
10 views

Bitcoin windows build error: ceil not a member of std::

I am using these bitcoin build notes to build a QT wallet for windows using Ubuntu 16.04 subsystem for windows. At the final step when I use sudo make I receive the error: chainparams.cpp:92:57: ...
3
votes
3answers
74 views

In lightning network, is the balance publicly anounced in realtime?

In lightning network, is the balance publicly announced in Real-time? From one hand, it should be public as it crucial to the routing mechanism. But, in case that the balance might reveal some ...

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