13
Alright, I finally managed to fix my bugs and get a full roundtrip. Here is an example for a full communication with a Pool.
I don't explain everything in detail as the API description can be found elsewhere.
a) Suscription
{"id": 1, "method": "mining.subscribe", "params": []}
{"error": null, "id": ...
11
Any CPU can still be used to mine Litecoin, although much less effectively as a modern AMD GPU could.
Mining with a CPU gives you very bad hashrate therefore I wouldn't recommend it.
Even a high end CPU will not give you the hashrate of a mid range GPU.
You should use a graphics card (GPU) to mine litecoins or switch to another coin
Additional Information:...
8
I think that Tim S. may have the answer with his comment about endian-ness.
Your observations about the nonce having its lowest byte zero (being a multiple of 256), are with respect to the little-endian byte order of the block itself. From the perspective of a big-endian machine, these are statements about the high byte of the nonce.
So consider a miner ...
7
Litecoin uses a different proof of work than Bitcoin, so that hardware won't be compatible(it won't be solving the right problems).
One of the motivations of Litecoin was to make CPU mining viable by making it difficult to create efficient GPU/FPGA/ASIC miners, so it's unlikely that you can find specialized hardware for this purpose. I think that some GPUs ...
6
Seed nodes are important even for SCRYPT coins. You need to edit the source code in particular the DNS seeds and IP address seeds in the net.cpp file. You can run this on a VPS or any always on internet connection with a static IP address.
Litcoin Net.cpp
The DNS seed node resolves to multiple IP addresses that are all running their own *coind instance ...
6
There are a few other GPUs that do a bit better according to this list:
https://litecoin.info/Mining_hardware_comparison
I think this is just based on user feedback to the Wiki. The ones with a lot more khash/s are multi-card setups.
Really if you have free power you should mine with whatever you can afford, then add more cards after you have coins and ...
6
It's the same: the proof-of-work is that the scrypt hash of the block header must start with a certain number of zeros (or, more precisely, be numerically less than a certain target value). However, the scrypt hash is not what's used as the block ID; rather, the sha256d hash (double sha256) is used instead. The sha256d hash doesn't have to follow any ...
5
The most common pronunciation I have heard is /skript/
4
No, you can't mine Litecoin with any of Butterfly Labs' products. There is an ASIC miner in development by Alpha Tech http://alpha-t.net/ that they claim will be able to.
4
Found a helpful post at litecointalk:
It won't work because the aux work must be explicitly provided by the merge coin. All of these coins cloned from Litecoin lack that code as Litecoin doesn't have it. As a result you cannot merge mine these coins.
It is the same reason you can't merge mine Terracoin or Freicoin with Bitcoin. Freicoin considered ...
4
I do not think there is a formal convention. Your best bet is probably to inquire at the inventor, the one-man company tarsnap. Start at their webpage about scrypt.
Since the important point is cryptographic security and because of their unix-like naming (tarsnap!), I'd say this probably follows the same convention that makes ssh the secure shell. Hence my ...
4
Currently, for a custom-built high-performance desktop, 16 GB of RAM (or even 32 GB) is typical, while one of the best GPUs, the AMD Radeon HD 7990, has 6 GB of GDDR5.
Suppose the memory requirements were raised to 4 GB. That means that each thread will require 4 GB, so a CPU can mine on 4 threads at a time (16 / 4 = 4), while a GPU can only mine on 1 ...
4
No. Bitcoin does not use Scrypt, so you cannot use something that mines Scrypt to mine Bitcoin. Furthermore, the Antminer S3 is a Bitcoin miner, it can only mine SHA256d coins, such as Bitcoin. So it cannot even use the Scrypt algorithm or mine any coins that use Scrypt.
3
The amount of memory that scrypt uses can be adjusted to get the desired behavior. If a particular CPU has enough L2 memory to hold all that's needed for a particular scrypt use case, then the performance of system memory will not be relevant. Scrypt-based coins can increase the memory requirements dynamically as one way of increasing the mining difficulty.
3
For Litecoin, if memory size is increased in processing the Scrypt
algorithm, for example to 384 kB instead of 128 kB (...), would the typical CPU
architecture (...) be likely to see a corresponding increase
in performance?
No, it works the opposite. If you increase memory, which is used by the scrypt to generate a single hash, the time it takes to ...
3
CPU is virtually useless for scrypt based coins like litecoin, stick to GPUs, for now.
Here is a comparison of the top GPUs you can buy for mining, with user submitted settings.
http://coinpolice.com/gpu/
3
I think the important factors for scrypt in OpenCL are as follows
GPU core clock rate
Memory clock rate / memory bandwidth
Memory bus width / channel
Computation Units
Processing Elements
You can check out in Programming Guide of AMD Accelerated Parallel Processing.
single or double precision of floating number does not matter. Either SHA-256 or scrypt is ...
3
How do I work out the SHA-256 and scrypt hashrate
You can look up your hardware e.g. here (BTC) and here (LTC). But I think it's much easier and more accurate to just try mining different coins for couple hours and measure hashrate directly.
For the Power(W) box, do I enter in my computers PSU wattage? I think it's 650w
PSU wattage is max. power it can ...
3
If you're scrypt mining a SHA256d coin, you will probably never get any shares accepted. You need to use the mining algorithm the coin uses.
3
No, the Jalapeño is a Bitcoin miner, it solves the SHA-256d hash function.
On the other hand, Dogecoin uses the Scrypt hash function. The two are not compatible, and as far as I know there is no Scrypt ASIC being sold, yet.
3
The use of scrypt vs SHA256 has an impact on proof of work but no impact on the signature scheme or transaction structures. The only thing that should impact you when using this library is the address prefix that differs with altcoins.
The standard address prefix for Bitcoin is 0. For Dogecoin for example it's 30. So you could reuse that same library and ...
3
When a mining ASIC claims to run at 1 MH/s or 10MH/s or even 1000 GH/s, at what difficulty
10 MHash/s means that the chip can do 10 million hashes per second, regardless of what the difficulty is. The difficulty changes how many blocks you find, but it doesn't change how many hashes the chip performs.
and with what algorithm is that measured against?
It'...
3
Litecoin basically copied the parameters from a coin called tenebrix. The parameters were chosen partially because using more memory intensive parameters caused the GUI to be noticeably slow.
Listen to Charlie Lee talk about this at the Hashers United conference in Las Vegas.
https://www.youtube.com/watch?v=aHX34MbXuOk#t=469m00s
https://www.youtube.com/...
3
The Scrypt algorithm started out as an "ASIC-resistant" algorithm, but it isn't anymore.
Because it is highly memory-intensive, it was thought to be prohibitive to design and use ASICs for it. Initially it kind of was. With cost of memory decreasing and the necessary research put in -- in order to unlock the profit potential attainable using Scrypt-capable ...
3
Wallets will only consider outputs to be theirs if it is something that it can spend from. This usually entails checking the output script against the set of scripts that your addresses will be used to generate. So even if you can sign for something, if the script does not match any of the scripts stored in your wallet, then it will not consider that output ...
2
No. A GPU will almost certainly always be faster than a CPU for Litecoin mining.
See the Litecoin Mining Hardware Comparison chart.
2
Production cost, an ASIC is a dedicated chip that does only 1 task and isn't programmable. Production costs for ASICS run into millions of dollars as it involves chip design, clean room manufacturing, and low yields (an industry average is that 50% of manufactured chips don't work and have to be trashed, can't be fixed). To create an ASIC for scrypt you ...
2
Theoretically, you could produce an ASIC for every possible algorithm. It's done all the time by NSA, CIA and their kind for cryptographic purposes. Why has no company produced an ASIC for scrypt or to look for Cunningham chains? Return of investment!
Developing an ASIC for scrypt is harder than for SHA-256, this is by design. So designing the electronics ...
2
Litecoin use scrypt with 128 KB of memory (source), therefore it can be stored in the CPU cache.
Scrypt is a sequential memory-hard hash function. You can tell it, how much memory it should use to generate a hash. You can even tell it to use GBs, in fact. The problem is, you always need that much memory to verify a hash. This will make hardware very ...
2
scrypt and scrypt-jane were chosen not because thay are "more difficult" then SHA-256, they are just different, and less suitable for GPU/ASIC implementation.
Whether using such algorithms is good or not is hard to tell. I'd say, since one can mine scrypt coins with commodity hardware now, while mining SHA256 coins even with decent GPU rig is futile, scrypt ...
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