0
votes
0answers
2 views

Reward system bitcoin

I'm not entirely sure how the reward system in Bitcoin works. So, every 10 minutes a block is solved and 25 bitcoins are rewarded to a miner (or group). This happens in proportion to the amount of ...
0
votes
0answers
4 views

Bitcoin Game Theory Analysis

I'm looking to analyse bitcoin for a (rather introductory, low-level) game theory course. Game theory concepts I'd like to explore with regard to bitcoin: strategic games with ordinal preferences and ...
1
vote
1answer
10 views

thin-client remote node lying through omission

is there a way for a non-full node (ie a node which does not contain the full blockchain) to know when it has received all transactions associated with an address? i understand that it is possible for ...
1
vote
1answer
9 views

Why did Litecoin choose the scrypt factors that they did?

Litecoin uses the scrypt factors (N=1024, r=1, p=1) This means that each hashing thread takes 128kB of memory. The scrypt paper recommends r=8. Colin Percival, the creator of scrypt, has said: Q: ...
0
votes
0answers
8 views

Can I build a mining ASIC from parts I find online?

I've noticed that there are all kinds of cards, blades, and other parts of ASIC mining rigs for sale on eBay. Is it possible I could buy some cards and blades and build my own high end mining ASIC ...
0
votes
1answer
10 views

Where can I find a full list of Bitcoin mining hardware?

I want to know where I can find a full list of Bitcoin mining hardware. I don't want a list of the most profitable hardware, I just want a list with the greatest number of Bitcoin miners (don't care ...
0
votes
2answers
15 views

How do I get to the value in the 'scriptPubKey' part of the transaction ?

How do I get to the value in the 'scriptPubKey' part of the transaction ? The sender knows only the address (1A3XjcuZmcszX2tGoVn1TrMNchuHwdAxZV) so how did he get into ...
0
votes
1answer
20 views

How to read a tx's comment?

How can I retrieve the comment field from a payment transaction that I made from my QT wallet? I can see the comment when I click "Show transaction details" in my QT but I cannot find a way to do ...
0
votes
1answer
27 views

What Ripple API libraries are available?

I am wondering, what libraries are out there for communicating with Ripple through its API (either websocket or JSON RPC)?
0
votes
1answer
20 views

What version byte will produce a Base58 encoding starting with X?

What is the Value of X in Base58? The Problem is when I referred to this table: https://en.bitcoin.it/wiki/Base58Check_encoding I in the end come up with D when I used 30, but I want X, so what will ...
2
votes
1answer
40 views

Is there a proof of work system which takes significantly more memory to generate than it does to verify?

Litecoin resists GPU speedup by using an scrypt-based hashing function that takes some amount of memory to generate and verify. The problem with this is that the r parameter needs to be set high ...
0
votes
1answer
11 views

How bit coin is generated during mining? [duplicate]

I know that when someone is able to find a block and hash that can be attached to the chain, he will be awarded with "the newly found bit coins" However, isn't mining simply finding the hash? Where ...
1
vote
1answer
22 views

Why am I unable to post two transactions (the second from the change address of the first) in the same block?

I'm attempting to make a transaction on the testnet with an OP_RETURN and a change address in it, and then make a second OP_RETURN transaction from first transaction's change address in the same ...
0
votes
0answers
11 views

What happens when the Block Reward of a Currency is Changed to a Greater Value?

What Happens if the Reward for block solving is changed to a very great extent and if most / all of the users update to that version with the edit.. For example if block reward is 12 x and it is ...
1
vote
2answers
28 views

Transaction unconfirmed after almost 2 day! Help!

I tried to send a bitcoin transfer Wednesday evening and it is still unconfirmed. It says "fees 0" but I have my block chain account set to "use recommended fee" by default. Can anyone help me get ...
0
votes
0answers
13 views

Why doesn't changing MAX_MONEY change the maximum number of coins?

I've changed MAX_MONEY to decrease the number of coins issued in my altcoin, but it's not working. Why?
0
votes
1answer
13 views

My altcoin bitcoinj fork is failing when trying to compile an Adroid wallet

I've been sent a bitcoinj fork which is meant to work for the android wallet I'm building. Unfortunately it seems to be causing a failure when tests are run during the wallet compile. I get the ...
-1
votes
0answers
12 views

getting error while building my new altcoin?

While Building my new alt coin, I get one single error, I didn't understand whats that means and how I can resolve that. I have below mention steps to build my bitcoin wallet in windows. ...
2
votes
1answer
59 views

How does “headers first” effect BLKxxxx.dat structure?

Assuming a full node running Bitcoincore v0.10 (with txindex=1), how exactly does the new "headers first" functionality affect the structure of the blockchain data? (Specifically, the blkxxxx.dat ...
5
votes
1answer
170 views

Did Satoshi intend to allow midstate computation to speed up hashing?

The design of Bitcoin allows computers to compute a hash with 2 iterations of the SHA256 compression function instead of 3 on all but 1 out of every 2^32 attempts. When Satoshi chose SHA256d for ...
2
votes
1answer
30 views

List of companies that has Implemented their own cryptocurrency or Color Coins in their business?

Is there a list of companies that has implemented either their own crptocurrency or went with the color coins approach into their business? I'm particularly looking for non-mining related companies ...
1
vote
0answers
42 views

How I make a portable version of Bitcoin for Ubuntu?

I want to create a bitcoin wallet executable file in Ubuntu with all its dependencies. So when use that file from some other system it will work perfectly. How I make a portable version of Bitcoin ...
2
votes
1answer
28 views

Bitcoin transactions over Ripple Network

I am interested in using the ripple network in conjunction with bitcoin transactions, but am curious as to interplay between the ripple ledger verification and the bitcoin blockchain verification. I ...
0
votes
0answers
38 views

Is it legal to buy things internationally for Bitcoin from India?

I want to buy educational videos from someone in the USA, who offers them privately for sale as a digital download. He accepts Bitcoin. I'm purchasing them from India. Would it be legal for me to ...
1
vote
0answers
25 views

Problem with Berkeley DB while building Bitcoin on Windows from Source Code?

I'm trying to compile Bitcoin from source code in Windows 7. When I run ./configure, I get the following error: checking for Berkeley DB C++ headers... no configure: error: libdb_cxx headers missing ...
0
votes
1answer
18 views

What does it mean to “password protect” your wallet on Multibit?

Isn't my wallet (i.e. my private key) already private? What does it mean to set a password for it? I assumed it encrypted the wallet file, but this answer seems to point otherwise. How can they verify ...
3
votes
1answer
37 views

Why are Electrum 2.x mnemonic sentences thirteen words long?

The 2.x version of Electrum uses mnemonic sentences that are 13 words long. However, 1.x versions use a sentence only 12 words long. I realize that 2.x changed the derivation of key pairs ...
1
vote
0answers
19 views

Javascript Stratum Miner

I'm aware of some Javascript RPC Miners, but does anyone know of any Stratum Javascrip Miners for use in my website?
0
votes
1answer
24 views

What does 1 day PoW mean?

I see several coins advertising 1 day PoW. An example is this coin. https://github.com/concealcoin/concealcoin I have been studying the code but must be missing a critical part as none of the math ...
1
vote
2answers
36 views

How to find the Bitcoin addresses used to create a Multi Signature address

Assume we have a 2 of 3 multi signature address and we send some bitcoin to that address. Then we spend the funds from that address by signing and broadcasting a transaction. Just by looking at that ...
-1
votes
0answers
39 views

how to receive my awards? [on hold]

I'm solo mining with two ASIC miners at 150 GH/s. On a solo mining pool with cgminer with my address wallet in user. I've all the time shares accepted and New block detected because this pool would ...
1
vote
0answers
42 views

on testnet: 'transaction already in blockchain'.. but it isn't

At least I don't think so! I'm trying to create a wallet infrastructure to minimise fees, and so I've been experimenting with raw transactions. I'm quite clueless but fortunately have enough sense to ...
1
vote
0answers
16 views

Why is “New Account” grayed out in Electrum?

When creating my wallet, I chose the options "Create new wallet" and "Standard wallet." I think this is a BIP32-based wallet. As you can see in the screenshot below, "New Account" is grayed out. Why ...
1
vote
1answer
38 views

Check if a user pays another user for bitcoin website

I am creating a bitcoin website. I would rather the bitcoin didn't go through my website to prevent any security issues. What happens is one user pays another user, and when that happens my website ...
0
votes
2answers
24 views

merged mining nonce

when mining bitcoin, the nonce is included in the header, which is then hashed and checked to see if it is below the target threshold. and everybody can verify that the header does indeed hash below ...
2
votes
0answers
27 views

Working example of raw transaction utilising Boolean (OP_IF, OP_ENDIF) scripting REQUIRED

I recently posted this Testnet TX (TxID 2d0daa01da8294a54178f8111eb2a02010c425fd15957d8baee8717edcfbe105) which successfully spends an output (TxID ...
0
votes
2answers
20 views

What is a midstate? How does using a midstate speed up hashing?

This defines "midstate" as the "precomputed hash state after hashing the first half of the data." I've heard "midstate" used in the context of speeding up hashing. How does using a midstate speed up ...
0
votes
2answers
29 views

Can coin wallets create their own network/blockchain?

In other words, I want a coin with NO premine and NO mining. Can the wallet, alone, generate the coin(s) and the blockchain, based solely on inter-wallet communication (establishing a wallet ...
0
votes
1answer
31 views

Gridseed USB ASIC Won't Mine Bitcoins

Okay so I have done my research, I have practically tried everything. It just frustrates me because mining LTC was a piece of cake but I can't seem to figure out how to mine bitcoins which this device ...
0
votes
1answer
33 views

What is the benchmark that mining ASICs are measured with to determine the hash rates?

When a mining ASIC claims to run at 1 MH/s or 10/MH/s or even 1000 GH/s, at what difficulty and with what algorithm is that measured against? I bought a cheap scrypt ASIC to see if it would live up ...
0
votes
1answer
17 views

Unable to Compile Particle-Qt using qmake in Ubuntu 15.04

Good Day! I am trying to compile the Particle-Qt Client on Ubuntu 15.04 Vivid Velvet using GCC 5.0 & libboost1.55 So my system is throwing errors, these are the following: While executing ...
1
vote
1answer
21 views

Is disclosing an index used for generating BIP32 addresses insecure?

I'm writing an e-commerce system that uses BIP32 to generate addresses. I was thinking of using the order number (which is shown to the user) to as the index for generating the address to pay to. ...
-1
votes
0answers
14 views

If I am mining at 50Mh/s…? [duplicate]

I currently got into bitcoin mining. I do not need to pay electronic or internet bills as of I live with my parents. So losing money from electricity isn't a problem for me. I am just wondering how ...
4
votes
2answers
60 views

Is there a special name for the block currently at the head of the chain?

Just as we have the genesis block which is block 0, is there a special name for the block currently at the head of the chain? Obviously such a block would be observer dependent and never absolute but ...
0
votes
2answers
51 views

“block decode failed” error while mining in pool

I just started solo mining last month, and I have no problems with cgminer. I have already shares accepted and sometimes new block detected. I want to know why when I want decode I've an error? For ...
0
votes
0answers
34 views

Does anyone have a formula for dynamic block durations?

I want to implement this, so does anyone have a formula for dynamic block durations instead of a fixed target of 10 minutes?
0
votes
1answer
24 views

Does anyone have a formula for adaptive blocksize?

I want to implement this, so does anyone have a formula for adaptive blocksize? I only found this: if(average size of last 4096 blocks*4>maxblocksize && median size of last 4096 ...
0
votes
0answers
29 views

Altcoin peers do not sync with each other

I created two altcoin peers and they can add blocks to genesis block. However their blockchains do not sync with each other! The only way let the block merge is to stop a peer and restart the peer. ...
-2
votes
0answers
11 views

How do I put Altcoin's Genesis Reward into my account?

I created an altcoin recently. Although I set the "scriptPubKey" to my wallet's public address, I still cannot receive genesis's rewards. Do I miss anything?
0
votes
0answers
24 views

Where is the code for verification of multi signature?

I want to apply the multisig system to my own project. It's not hard to get the code for the client (or signing?), but where is the code for the verification process?

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