I got into bitcoin with the thrill of mining, but now that the difficulty is through the roof (my btc turned scrypt rig would make about $0.34/day), what is there to get into? As the price sort of stagnated, I'm wondering if anyone has interesting ways of earning bitcoins, or anything that might bring my interest back into something I once thought was amazing but now don't seem to have the time for (which is not what I want for btc's future)

Can anyone link me to a list of/ provide a list of coins with the 'charity' output, i.e a certain amount of coins from each block go to the devs?

Thanks,

From looking at paycoin, and trying to setup a block explorer, I've noticed a few odd things about it.

It doesn't seem to have a 'magic number', or at least not one I can find in the code. for some reason the block database starts at blk0001.dat instead of blk0000.dat, and the timestamp is done in a human friendly format.

Are there any other changes people have noticed?

I was a pretty passionate bitcoin miner throughout 2012-2013, but then effectively went on a hiatus when the price began to dip and mining was no longer profitable for me. Now that I have returned, and that some of my other commitments are over, what is the best way to earn BTC? Preferably through doing something, rather than purchasing BTC or hardware. E.g I started to mine with my own pc, meaning I did not have to buy anything to get started.

Where do you make your BTC from?

I have these games available for sale, name your price.

Code:

Hitman: Blood Money
Hitman: Contracts
Just Cause Steam
Sid Meier's Civilization III: Complete
Sid Meier's Civilization IV: The Complete Edition
Sid Meier's Railroads!
Sid Meier's Civilization V
Sid Meier’s Ace Patrol
Sid Meier’s Ace Patrol: Pacific Skies
The Last Remnant
Tropico 4: Steam Special Edition

Selling Windows 7, 8 and 8.1 Product keys, Pro and not Pro. Retail prices are available on the Microsoft store, ($200 for 8.1 Pro). Windows 8 keys can be upgraded to 8.1 for free upon installation.

PM me your offers, and I can arrange transfer of keys, with a 50/50 split before and after key delivery.

Thanks,

nuggetbram 

Would it be possible to direct hashes at numerous coins, considering they all use the same hash output?
There probably is a lack of understanding here on my part, but would there still be a slim chance that some of those hashes happen to be solutions to a different network?

For my website, I am looking for a simple Bitcoin transaction processor. I need something that's not too "or pay with Bitcoin" as it is a bitcoin site, there will be no other payment method. I'd like it to be that the user chooses a prouduct and quantity, and receiving a simple QR code or address to pay to which will email me with their order details and give them a unique "proof of transaction".


Is there anything like this you can reccomend, or any general one you've had experience with?

Thanks,

Nuggetbram

I'm looking into controlling and/or reading the rpc-json output of bitcoin as a learning exercise. Is there a way to be notified of a new network block in the same way that cg or sgminer would output? I don't mind what language, as I've been using command line curl so far, but there obviously isn't a 'notifymeofanewblockinstantly' api call

A basic example to point me in the right direction would be excellent

thanks,

nuggetbram

I'm in the process of screwing around trying to learn c++ in a bitcoin related environment. I've so far made, in QT, a gui application to essentially write the batch files for me. Now all I need is for it to display rpc/api things (speed, a/r etc...).

I've got no idea how to do this, other than it requires JSON.

Could someone show me some example code or something along those lines? I've found python and c# examples but I'm not really sure how to convert those...

I'm looking for something that I can use as a string (so I can set a label to it easily   )

Thanks,

nuggetbram

The one old card in my rig doesn't seem to run nicely at all. It achieves about 350 kh/s on scrypt, but I can't get good performance out of any of the newer algos. I only get 420 on X11! I've tried all the config options I could think of...

Does anyone have any good settings for a 6870?

After inspecting bitcoin's hashing section, I discovered this in hash.cpp

Code:

unsigned int MurmurHash3(unsigned int nHashSeed, const std::vector<unsigned char>& vDataToHash)
{
    // The following is MurmurHash3 (x86_32), see http://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp
    uint32_t h1 = nHashSeed;
    const uint32_t c1 = 0xcc9e2d51;
    const uint32_t c2 = 0x1b873593;

    const int nblocks = vDataToHash.size() / 4;

    //----------
    // body
    const uint32_t * blocks = (const uint32_t *)(&vDataToHash[0] + nblocks*4);

    for(int i = -nblocks; i; i++)
    {
        uint32_t k1 = blocks[i];

        k1 *= c1;
        k1 = ROTL32(k1,15);
        k1 *= c2;

        h1 ^= k1;
        h1 = ROTL32(h1,13);
        h1 = h1*5+0xe6546b64;
    }

    //----------
    // tail
    const uint8_t * tail = (const uint8_t*)(&vDataToHash[0] + nblocks*4);

    uint32_t k1 = 0;

    switch(vDataToHash.size() & 3)
    {
    case 3: k1 ^= tail[2] << 16;
    case 2: k1 ^= tail[1] << 8;
    case 1: k1 ^= tail[0];
            k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
    };

    //----------
    // finalization
    h1 ^= vDataToHash.size();
    h1 ^= h1 >> 16;
    h1 *= 0x85ebca6b;
    h1 ^= h1 >> 13;
    h1 *= 0xc2b2ae35;
    h1 ^= h1 >> 16;

    return h1;
}

What/why is there murmurhash in the middle of bitcoin?

What does it do, excatly, and why have I never heard of this anywhere? I'm not very proficient with cryptography, so a detailed explanation would be great

Thanks,

After rewriting litecoin to use the whirlpool algorithm, I'm having issues compiling the qt wallet. Daemon compiles perfectly, yet when I try to compile the qt wallet (linux at this stage) i get this after compilation when it tries to assemble the executable.

Code:

build/core.o: In function `CBlockHeader::GetHash() const':
core.cpp:(.text+0x438): undefined reference to `sph_whirlpool_init(void*)'
core.cpp:(.text+0x44d): undefined reference to `sph_whirlpool1(void*, void const*, unsigned long)'
core.cpp:(.text+0x458): undefined reference to `sph_whirlpool1_close(void*, void*)'
build/core.o: In function `CBlock::print() const':
core.cpp:(.text+0x1d20): undefined reference to `sph_whirlpool_init(void*)'
core.cpp:(.text+0x1d3d): undefined reference to `sph_whirlpool1(void*, void const*, unsigned long)'
core.cpp:(.text+0x1d4a): undefined reference to `sph_whirlpool1_close(void*, void*)'

sph_whirlpool.h (where those things it can't find are), whirlpool.c and hash.h (where they do things) are all in the .pro file, and the core.cpp includes sph_whirlpool.h

Any ideas? I've made several coins previously and such as simple problem is really frustrating me...

I've made a couple of coins thus far simply for the fun of it, haven't actually released anything. I have an idea for a new, pretty innovative coin, yet lack the skills to execute it.

My idea is to have a (X11/X13, maybe an entirely new algo if possible) POW/POS coin with payouts in BTC if wanted. This would have to go through an exchanges api, but still likely probable.

I don't have a great deal of money available for this project, hence I am looking for a more proficient coder to help implement these features into a coin that I make, preferably in a partnership, likely a 50-50% split of any profit made.

PM me if interested

nuggetbram

At the moment the daemon and qt-wallet are separate, yet the qt-wallet contains and needs all the data within the daemon. Would it not be possible to have one wallet that draws on the daemon, treating it like a dll?

I've got tons of btc and other altcoin wallets after updates, and would love it if I could just replace the daemon in the same folder as the wallet (which could then be cross compatible with other (similar) altcoin daemons).

Is that at all possible?

Out of all the masses of altcoins, which parameters do you feel work best? (I'm only dealing with pow here)

Should the rewards be low or high? Does fighting inflation by cutting rewards really help? What block times offer maximum satisfaction?

I personally believe that a consistent reward of 75 at 2 minute block times is the best (so good, I can't even remember what coin it's from)

What are your opinions?

I've recently discovered DvoraKoin, https://bitcointalk.org/index.php?topic=613854.0 Which has multiple algorithms and a skewed block rewards system.

It had a big spike on the weekend but has since lost a bit of interest, but after modifying bitcoin and litecoin's parameters on coinwarz, I've noticed that even at its current weak price it's still waaay more profitable than LTC or BTC! Mining with 1000khs scrypt will net you about $3.50 per day! That's almost 3x the profitability of LTC!

BTC is the same! 100gh/s mining the SHA-256 section of DVK will have you earning $8.00 per day, as opposed to bitcoin's $3

The other featured algorithm, Groestl, is again the same story. (Groestl is in my opinion better than X11 and Scrypt)

10mh/s on Groestl will earn you about $2 per day, while GroestlCoin (The Groestl flagship) will be more like $1 per day.


Jump on board now! This coin seems to have died off a bit, but once a few miners realise its profitability I'm sure the price will go straight back up!  (It almost hit 0.001BTC on the weekend!)

I've recently gone through the pain of compiling a mac altcoin wallet, which runs on the computer it was buit on fine, but not any others with the message "Damaged or corrupt" on launch. Is this a common problem? If so, what have I done wrong? (I followed the guide in the litecoin github)

Thanks,

I've recently gone through the process of making my own MPOS server (just for a bit of fun), with this guide: http://coingolem.com/how-to-set-up-your-own-mining-pool-using-mpos-229/


It all seems to be working, but on startup I get this message:   Database version mismatch (Installed: 0.0.10, Current: 0.0.8 ). Database update required, please import any new SQL files. Cronjobs have been halted.


Any ideas? I'm pretty stumped!

What is, in your opinion, the best miner for me to buy with a $500 budget?

I've already got a small LTC rig and some smaller BTC miners, and I've finally accumulated about 1BTC or $500 worth.

Is there a miner I will achieve ROI with for this price? Anything worth buying at this stage in the 'arms race'?