0
votes
2answers
24 views

Deduct fee from transaction amount

I am using sendtoaddress API call. The problem is that I need to specify amount that includes fees. For example, if I withdraw 1 btc, I need bitcoind to deduct fees from that amount and in example to ...
2
votes
1answer
31 views

How does namecoin and other merge-mined coins prevent pre-mine attacks?

So, namecoin supports merged mining against bitcoin. My understanding of the merged mining protocol is that basically miners can use the primary coin's POW solution to solve the aux coin's block. It's ...
1
vote
1answer
55 views

Mining costs, impact on long term viability of BTC

It appears to me that electricity costs to mine blocks are rising at an unsustainable rate. Charts of difficulty and network hashes are growing exponentially. This is unsustainable. Currently miners ...
1
vote
2answers
80 views

Can the Bitcoin blockchain eliminate the need for Trusted Computing in Smart Contracts?

Let me preface this by saying that I'm a novice, but this is my rough understanding of how Bitcoin's blockchain works. (This is largely based on blog posts like this one.) If person A wants to ...
1
vote
1answer
33 views

A crypto-currency for supporting informal education?

I am involved with Funoon (funoonfoundation.org), a non-profit working to organise informal learning spaces. These informal spaces are basically physical spaces where learning happens on a ...
1
vote
1answer
24 views

Which wallet application lets you send to multiple output addresses with just 1 fee?

Which wallet applications lets you send to multiple addresses from one output? I'm looking to build a physical bitcoin kiosk faucet and was looking to see how I would avoid miner fees if i combined ...
0
votes
1answer
20 views

How to import entire Armory wallet into Electrum?

I've managed to import a private key, but how to import an entire wallet?
0
votes
0answers
47 views

MySQL performance issues when saving Bitcoin data [migrated]

I have set a cron job to a php script which periodically checks Bitcoin for new blocks, and if there are any, add the blocks and transactions to a database. After a few million records have been ...
0
votes
1answer
29 views

BTC-E API and determining volume for any time interval

I've been logging data from BTC-E for a couple of months now and am writing my own charting app for personal use. I've been stumped for a while now on what the difference between "vol" and "vol_cur" ...
1
vote
1answer
17 views

Listening for changes to my own wallet in the blockchain

I would like to be notified of changes to any of my many wallet address as soon as they happen and then programmatically take action. I have been using wallet notify but this has been giving me really ...
1
vote
1answer
81 views

How can I create a new wallet on Bitcoin Core?

How can I create a new wallet on Bitcoin Core (Bitcoin QT)? I forgot my old password, so I can't create transactions using the old wallet. I don't have money on my old wallet, I just need to create ...
1
vote
1answer
25 views

Which altcoins have testnets?

Bitcoin can be run on a public testnet (by using a different port than the real Bitcoin network). This is very useful for development, because you can test software handling Bitcoin without handling ...
-2
votes
1answer
18 views

dogecoin wallet not displaying updated balance [duplicate]

i transferred some dogecoins from my dogeapi account to the wallet set on my system(ubuntu) , the balance has been deducted from dogeapi account but its not being displayed in my system wallet, ...
0
votes
0answers
8 views

How to estimate the number of Bitcoin miners vs Mining pools? [duplicate]

I can't tell which one this is showing: http://getaddr.bitnodes.io/dashboard/ Thoughts? Thank you!
0
votes
0answers
31 views

How can I install BFGMiner on Bamt

I'm trying to consolidate and remove a pc out of the equation that is acting as a server for 68 block erupters and 3 antminer u1s. I have two rigs running bamt currently fine and want to be able to ...
-1
votes
1answer
17 views

How to use csv file? [on hold]

I'm trying to figure out how use the csv files provides by bitcoin charts. I understand that the units in the files are unixtime,price,ammount, but I'm not sure how to utilize these to develop some ...
-1
votes
0answers
9 views

rippled errors: peer map

In rippled, I consistently get an error: 2014-Apr-06 22:36:08 Peer:ERR We do not have the map our peer wants What does this mean? Is it really an error-level warning, or is everything okay?
3
votes
1answer
30 views

Does getaddr.bitnodes.io find all Bitcoin nodes or only one node per mining pool?

Any ideas for finding the number of Bitcoin nodes vs the number of Bitcoin pools? Thank you!
0
votes
1answer
16 views

How do I use Vanitygen on Fedora 20? (openssl restrictions)

I have seen several methods for building bitcoin from source on Fedora, but I have not seen corresponding information for vanitygen. It builds, and it starts up, but then it gives me the error: ...
-1
votes
0answers
24 views

building wallet with gitian error

hi guys im getting an error trying to build an altcoin wallet for windows(its a test coin not a coin to be released) with ubuntu 13.10 64bits,im following the instructions in here infinitecoin gitian ...
3
votes
1answer
89 views

Mt. Gox losses for tax purposes

If I put $50 into Mt. Gox in February 2013, made multiples trades from BTC to USD and back, always remaining in the Mt. Gox system, and then lost all of it in the March bankruptcy, how do I handle ...
1
vote
1answer
27 views

How would AML techniques work in Ripple?

Can anyone explain how AML rules, alerting, and FinCEN reporting would work under Ripple?
2
votes
2answers
18 views

Generating addresses on the fly or pre-generate and store public key?

When running a service that needed a bitcoin address, would it be better to generate a new address to use at that moment and store the private key on your server, or would it be better to pre-generate ...
2
votes
1answer
54 views

In pooled mining, what is pdiff, bdiff and ldiff?

In pooled mining, there seem to be three different terms for difficulty in use. Apparently, the Stratum protocol uses bdiff, BTCGuild uses pdiff, and Ldiff is common for various Scrypt pools as ...
0
votes
1answer
24 views

Ripple: How to monitor multiple accounts reliably and effectively?

rpc = RippleNetwork(app.config['RIPPLE_SERVER']) poll = RippleNetwork(app.config['RIPPLE_SERVER']) last_ledger = Variables.get('ripple_last_ledger') poll.subscribe(streams=['ledger']) while True: ...
7
votes
2answers
332 views

Is it possible for someone to verify that a wallet is theirs wallet, without providing their private key?

I need to know with 100% certainty that someone can tell me "this is my wallet" and prove it to me. I could of course simply get their private key/brainwallet phrase, is there any other way to do it? ...
3
votes
1answer
31 views

How can Ripple trust lines be exploited to scam unknowing people?

This ripple forum post says moocowpong1 wrote: "She might also do this for free if she has IOUs from GatewayB and wants to convert them to GatewayA IOUs." She might also do this ...
-1
votes
1answer
52 views

What is the best solution ( i think i will mine with 3Gh/s ) [closed]

First, I'am a newbie in bit-coin and lite-coin so basically i want to setup some machine to get a (3 G Hz/s ) The cost of electricity are not a problem So please tell me which strategy to choose And ...
0
votes
1answer
36 views

How to confirm offline a transaction

Is it possible to confirm a transaction offline in the following scenario: the "receiving" device is first online. There is no restriction at this point. Especially, it can prepare anything needed ...
0
votes
0answers
12 views

including a conf file in util.cpp

i am including some code to generate a config file when anyone runs the qt wallet. its just like bitcoin, but a change from maxcoin. this is the code that i included in util.cpp ...
5
votes
4answers
120 views

What advantages do “alt-coins” have over bitcoin?

I'm struggling to see the importance of alt-coins. It seems to me that one of the major selling points of the various alt-coins is their quicker confirmation times. The common argument is: this is ...
0
votes
1answer
43 views

my wallet will not send BTC

I get this error when I try to send BTC A FATAL ERROR OCCURRED. Bitcoin can no longer continue safely and will quit. Exception: St13runtime_error CDB(): can’t open database file wallet.dat, error ...
1
vote
2answers
37 views

Is block height always sequential?

Is block height always sequential? Can it serve as a 100% reliable block counter in case if I want to check whether I missed a block or I need to account for any corner cases?
-1
votes
1answer
67 views

How to validate raw transactions using bitcoind and/or bitcoin-cli (preferably offline)?

I've been wanting to join in the fun on this Bitcoin transaction contest but while I'm comfortable enough working out the scripts themselves and playing with the web-based tools suggested, as a ...
0
votes
1answer
32 views

MultiBit won't open, says “Java not installed”

My MultiBit wallet won't open, because "Java is not installed", though I have Java 8, 7u51, and 6u49 installed... Which version of Java should I have installed?
1
vote
3answers
67 views

Do all Bitcoin alternatives need to have a coin limit?

In the Netherlands, it was just in the news the e-gulden was launched. Before we got the Euro (€) we had that currency in our country. An E-gulden (EFL) is currently 50 EFL = €1,50 But is there for ...
1
vote
1answer
48 views

Is change of Bitcoin address of an account possible?

I have multiple Bitcoin addresses in my Bitcoin Daemon, Which address will be used for receive transaction Can i change my default account address(mentioned in 1) to new one
1
vote
1answer
24 views

Does Ripple use NTP?

Does Ripple use NTP or expect the nodes to do so? If not, why not? It seems that Ripple is a little more closed than your standard cryptocurrency, so this doesn't seem like an excessive demand.
0
votes
0answers
61 views

Need to do 400 transactions, how do I get them confirmed?

I tried to send 0.00000001 btc to about 7 addresses, and paid the 0.0001 fee. But it seems like this transaction won't go through ever. Those coins are lost :(. I have about 400 sponsors, and they ...
2
votes
1answer
50 views

Do electrum fully support Hierarchical Deterministic Wallets?

I'm curious if electrum fully support Hierarchical Deterministic Wallets (BIP32). I have seen in source code that some part of implementation is done. But there are also as I think some electrum ...
5
votes
1answer
60 views

Can you always derive a public Bitcoin address from a message and a random signature?

Let's say my Bitcoin address is 1Nu5mzpUD9A7daZ76QJEsBfkBjCWVLh7pJ and I sign the message random-challenge with its private key. The result is : ...
0
votes
2answers
75 views

RPC calls fail in testnet mode, but not normal mode?

I'm running bitcoind on a debian web server. If I run in normal mode, i.e. "bitcoind -daemon," then it seems to work completely fine. [birdseye]$ ./bitcoind -daemon Bitcoin server starting ...
5
votes
1answer
86 views

Are virus signatures a serious threat to the bitcoin network?

I read this in a forum post on another site. Here's my recap. But by "I" I mean me, not the original poster. All transactions over the bitcoin network is stored as raw data forever in the distributed ...
0
votes
0answers
50 views

I am new with peercoin and confused is it mining or not [screenshot]

I am new in peercoin and trying first time mining of any currency just to see how it works. I installed cgminer but there's an error Probing for an alive pool Network diff set to 91.5 like ...
1
vote
1answer
34 views

blockchain.info api for tor hidden services

I would like to use blockchain.info "recieve payment" api for my hidden service, but would like opinion on the following considerations: Will it be possible to use blockchain.info api for hidden ...
0
votes
0answers
18 views

Arbitrage possible? [duplicate]

The last days I was thinking about arbitrage trading because the prices differ between several exchanges. So I started thinking if this could work and I'm stuck in one point. If I deposit money on ...
0
votes
1answer
42 views

Comparing Bip 38 to AES256

Can anyone explain what are the advantages of using BIP 38 Bitcoin wallet encryption to simply encrypting the private key with AES256?
0
votes
1answer
58 views

How much space needed to run Bitcoin daemon in amazon AMI?

How much space needed to run Bitcoin daemon in amazon AMI(ubuntu 12.04), I am currently having 20GB is that enough suppose i want to run multiple coin daemon say 6 coin daemons how much space(approx) ...
1
vote
0answers
21 views

Miner hardware problem

So, I have been mining LTC with a custom rig (see below for hardware details) and this morning it was down. When I restarded it, it worked fine for two minutes then shut down again without beep nor ...
0
votes
1answer
45 views

Forgot to add transaction fee, any way to add it now? [duplicate]

Today I sent 1.5 BTC to an exchange but forgot to add a transaction fee, the Qt wallet didn't even prompt me with one and I just clicked on Yes. Now it's been over 2 hours and it's not confirmed (as ...

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