0
votes
0answers
2 views

POS Receipt payment identification

Lets have a scenario where POS software wants to support bitcoin payments with zero risk. Ideal is to store Merchant's Bitcoin address in POS settings. The intention here is to uniquelly bind receipt ...
0
votes
1answer
10 views

paytxfee vs maxtxfee which one overrides the other

In wallet options section it shows these two settings -paytxfee=<amt> Fee (in BTC/kB) to add to transactions you send (default: 0.00) -maxtxfee=<amt> Maximum total fees to use in a ...
0
votes
0answers
14 views

How can I start to mine? [duplicate]

I want to begin to mine on a computer, I know that it is not efficient but I want to do some experiments and tests for a project. I tried all programs in the list ...
0
votes
1answer
15 views

How can you restore a password in MultiBit if you are given the wallet words BEFORE you even enter a password?

How is it possible to recover a wallet password when the wallet words are provided before you even enter the password? https://multibit.org/en/help/hd0.1/restore-password.html Restore password ...
0
votes
0answers
6 views

How do I restore a wallet from a backup file in MultiBit HD?

If I have a backup file like mbhd-*.zip.aes how do I restore it using only my password? When I click on Restore Wallet, it only asks for the wallet words, not the file path or password.
0
votes
0answers
10 views

How to get balance from a specific address in bitcoinj?

I'm trying to get the balance of a specific address by using bitcoinJ, but I don't know how. Can someone help me? Thanks in advance!!
0
votes
0answers
74 views

bitcoin bet on brent price

Does it exist place where I can make bet on brent oil price? For example I put 1 bitcoin and bet that: if oil price will grow to 1% I will loose bet, and if oil price will fall to 1% I will double ...
0
votes
1answer
15 views

Restricting transferability of Smart Contracts

Can a smart contract be created which can be exchanged once at point of sale, and only transferred subsequently through a single approved exchange? Can that be written into the contract itself?
0
votes
1answer
9 views

Retrieving BitCoin Payments, Confirmation Question

I'm receiving BitCoin payments via the blockchain.info api. I notice it sends a confirmations parameter, and it also continues to call the callback url until the response is *ok*. Instead of ...
-1
votes
0answers
16 views

total mining pools

Now that mining pools are starting to hit the 51% cusp of total mining power, what would need to happen to the Bitcoin protocol to reduce their success, and encourage distributed mining power over ...
1
vote
1answer
16 views

What was the original rationale for limiting the maximum push size?

The current Bitcoin client filters out any pushes beyond a certain size. static const unsigned int MAX_SCRIPT_ELEMENT_SIZE = 520; // bytes [...] if (vchPushValue.size() > MAX_SCRIPT_ELEMENT_SIZE) ...
0
votes
1answer
14 views

how to capture only one part of the getrawtransaction

I want to capture just one part of what Getrawtransaction returns, but it returns an array within an array that i can't seem to process. I.e when $txid = ...
0
votes
0answers
14 views

Bitcoin script stack numbers format

On bitcoin wiki site I cant found this specification: *The stacks hold byte vectors. When used as numbers, byte vectors are interpreted as little-endian variable-length integers with the most ...
0
votes
0answers
25 views

OS Windows Reinstalled, Bitcoin Core bitcoins lost, how do I recover them?

I've lost my bitcoins when I reinstalled OS on my computer. I still have my receiving address and the password I used to encrypt my Bitcoin Core Wallet. How do I recover the lost bitcoins? Does ...
1
vote
1answer
29 views

Can synchronization time be reduced?

I'm trying Bitcoin for the first time, so I'm about 7 years behind. As far as I understand every bitcoin user has a copy of the entire transaction record that has happened for all time for all ...
0
votes
0answers
13 views

I want to buy some xrp and hold them offline

I want to buy some ripples (xrp) and hold them offline ( I want to keep the secret key with myself rather than trusting some hosted websites). Are there any steps to do this? Is ripple trade account ...
0
votes
1answer
28 views

Can a cryptocurrency exist in a closed system?

I am developing a online game that requires a realistic economy and currency. I know I can create a new crypto coin currency with out much effort. What I am unclear on, is it possible for me to mine ...
1
vote
1answer
34 views

Generate addresses without private key: Stealth addresses vs Master Public Key

In my case a store owner has different POS terminals. On none of the terminals should be a private key stored! The owner has one wallet, where he wants to get all transactions aggregated, done on the ...
0
votes
0answers
59 views

Is there an exchange for trading the future output of ethereum rigs?

Is there an altcoin exchange where (Primary market) a miner can sell fractions of the output of their rig over a certain future time period? (Secondary market) a trader can sell the rights to ...
3
votes
3answers
222 views

Could Bitcoins (or any other blockchain based cryptocurrency) feasibly ever be used for purchases that need to go through fast?

Today, one of the problems with cryptocurrencies like Bitcoin is that it takes quite some time for a transfer to go through and enough confirmations to take place. This really isn't a problem when it ...
1
vote
1answer
22 views

Challenge difficulty adjustments

Basically for this question I need a confirmation that all of my listed assumptions are fairly accurate. The bitcoin network measures how much time it took to create the last 2016 blocks in a ...
0
votes
1answer
16 views

What is the function to get the object of a NXT asset in javascript?

I want to get an object and its variables of a NXT asset. What is the function to retrieve an object of an nxt asset?
1
vote
2answers
14 views

Bitcoin information data protocol

Obviously for the Bitcoin system to work, we need an information network on a global scale such as the Internet. I am sorry if this is a stupid question. What exact information protocol is being ...
0
votes
0answers
12 views

Problem while trying to set up bitcoinj

I'm fairly new to programming and have only builded some basic java applications, so bear with me. I'm trying to run the basic wallet application from the bitcoinj repository (using intellij and ...
1
vote
1answer
31 views

What would you do while a hard fork lasts?

It is conceivable (though generally buried with cognitive dissonance, I imagine) that a hard fork might not get resolved. This almost happened once before, and the miners picked the fork that solved ...
2
votes
1answer
21 views

Service that displays how many inputs/outputs there are in the blockchain?

Ideally, I am looking for a service like http://statoshi.info/, but one that displays the real-time number of inputs and outputs in the blockchain. Note that I am not looking for information on the ...
0
votes
0answers
9 views

NBitcoin - SPV - DevideByZeroExceprion

I downloaded Nicolas Dorier SPV project from git, where he presents how to use NBitcoin to make simple wallet. It was set for TestNet as default. When I changed it to Main net I started getting ...
0
votes
0answers
6 views

NBitcoin - AddressManager - what is source?

In Nbitcoin.Protocol we can find: AddressManager.Add(IPAddress addr, IPAddress source) what is the 'source' param? I understand that addr is node address (i.e.:123.32.12.54:8333 for main net) but ...
0
votes
1answer
45 views

Can bitcoin and altcoin co-exist in sidechain? If Yes, strategy

I have private block chain - tweaked bitcoin blockchain with a private coin by creating a Genesis block. Lets call it "PrivateCoin" I also have a sidechain elements/alpha instance, I effectively ...
2
votes
1answer
18 views

How can I request payment to a set of addresses?

I am building a payment processing service where a single payment may be split among multiple individuals. While it would be possible for me to write the service in such a manner that a customer pays ...
0
votes
1answer
16 views

Multibit password incorrect - what else can cause this?

I have my balance cash display on my Multibit account at left top of my account which was my last transaction. But to send it out to another bitcoin account, it keeps telling me that "The wallet ...
0
votes
0answers
16 views

Bitcoin Forwarding Services? [on hold]

Anyone can tell me some bitcoin forwarding services? apart of blockcypher blockchain and block.io? Thanks!
1
vote
1answer
20 views

Do you receive interest on Peercoin if you use an online wallet?

I know Peercoin is proof-of-stake, but if I use an online wallet, will I receive any of the coins generated for my stake? Or do I have to have to download a desktop wallet?
0
votes
2answers
13 views

Is there any service/api for deriving HD wallet addresses from a master public key?

I need this for a tool i'm writing that generates a transaction history report. think: accounting, auditing, etc. The tool does not and should not have access to the private keys. Ideally, the ...
0
votes
0answers
14 views

Details of Bitcoin mining rewards [duplicate]

I'm looking for some details about how Bitcoin mining rewards are doled out. It seems like the world of Bitcoin mining is composed of CPU miners, GPU miners, ASICs miners, and mining pools. And it ...
0
votes
0answers
17 views

NBitcoin - get Transaction for address

I am making BTC wallet. My current task is getting all transactions for address. Is there anyone who can help me figure it out? I would really don't like to dig in blockchain or something like that. ...
0
votes
1answer
34 views

Using GPU mining with the Bitcoin Wallet

After asking this question about using the Bitcoin wallet to mine, I am wondering how I can get my GPU involved with the mining work? Is this possible? or this there other, non-pooling software that ...
1
vote
2answers
19 views

How does the bip32 version bytes convert to base58?

Converting the BIP32 version bytes - x04\x88\xad\xe4 - from base256 to base58 and base58Check returns 7irrX and 1kz713TZjju, respectively. I thought the version bytes represented xprv. What am I ...
1
vote
1answer
28 views

What if I backup my wallet from a client that is not fully synced with the blockchain?

I've just backed up an encrypted wallet, but the client (Bitcoin-Qt) is 26 weeks behind. During these last 26 weeks this wallet has only received BTC (roughly one transaction per day), no payments ...
1
vote
1answer
31 views

Do we need to maintain the ability to do a reorg over 100 blocks?

The protocol requires that freshly generated coins wait 100 blocks before they can be spent in order to avoid polluting bitcoin addresses with bitcoins that are "uncreated" by a reorg that invalidates ...
-1
votes
0answers
27 views

I want to make investment in BTC mining machine [closed]

I have read some, I have do some calculation and I realize that Bitcoin would be very profitable. I want to ask you friends which is the best mining machine for 2015. I have looked the KnCMinner ...
1
vote
0answers
19 views

Fees when using leverage

I have been wondering how trading fees are actually calculated e.g. Kraken takes 0,35% of every trade. Does this fee apply both when I buy bitcoins and later when I sell them? Furthermore if I choose ...
1
vote
1answer
23 views

Is there a deterministic private-public keypair generator without the BIP32 private key revealing issue?

HD Wallets have a flaw that revealing a private key and its parent master public key will reveal its parent master private key. (Described here[1] and here[2]). Isn't there a similar concept with ...
1
vote
1answer
34 views

About traditional Bitcoin mining

I'm curious about traditional bitcoin mining, before pooling. Did an older version of the bitcoin wallet found on sourceforge have a mining feature built in which worked on a simple macbook? if so ...
0
votes
1answer
47 views

Problems with Blockchain API

Im having problems because when a user pay to a forwarding address, the forward address receives bitcoins instantly, but takes nearly 1 hour to send those bitcoins to the destination address, the real ...
1
vote
1answer
25 views

How are the assets locked and unlocked trustlessly using sidechains?

I am reading sidechains white paper and in section 3.2 Symmetric two-way peg they mention that: "The parent chain coins are sent to a special output on the parent chain that can only be unlocked by ...
2
votes
1answer
22 views

How can one extract an address balance at a specific height?

Is it possible to view the balance of an address at a specific height, without using any external web api? Could it perhaps be done using bx or the Bitcoin client API?
3
votes
2answers
70 views

Are blocks sent only after finding nonce?

One of the concerns with increasing the block size is that it may get orphaned more often due to network latency in sending the big block. Why can't miners send the block without the nonce as soon as ...
-1
votes
0answers
9 views

Bitcoin and make money? [duplicate]

How do you get start with Bitcoin and make money? I have visited many website and cannot figure out what I am doing. Thanks
2
votes
1answer
46 views

Is it possible to have my blockchain on a different folder than that of my wallet files?

I am trying to implement bitcoin payments for the project I'm currently working on, and I need to create a bitcoin wallet that should be inside a USB stick. This USB stick should be at the hands of ...

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