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Author Topic: [XMR] Monero - A secure, private, untraceable cryptocurrency  (Read 4628478 times)
smooth
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May 09, 2014, 01:02:56 AM
 #1161

Can you explain how someone could corrupt the block chain ?
If I'm synced with the network, then the checkpoint won't affect me since they are in the past.
And I won't accept changing old blocks.

So you should explain us how the checkpoint corrupted the blockchain, and how to check for a good or bad one.

Is'nt there a command to recheck the entire blockchain, without having to download it ?
If not, it is needed.

If you had a full chain, it very likely was never corrupted. (Of course there could always be bugs but we don't know of any that would do this.)

If you had tried to sync after the checkpoint was added, the code could have accepted some earlier blocks (before the checkpoint) without fully validating them.

If you downloaded a valid blockchain file (which would have included all of the blocks up to the checkpoint) and used the code version with the checkpoint, you were in all likelyhood not affected, other than some invalid blocks being accepted by your node (but offchain), bloating your memory and disk usage. This could have eventually become a denial-of-service issue, if the number of invalid blocks continued to grow.

There were probably very few people directly affected.

But when it comes to the integrity of the blockchain it does not pay to take chances. So the checkpoint has been temporarily removed forcing all blocks to be fully validated and will likely soon be added back in a safer way.

A command to validate the existing block chain is a good idea. We will look at that, possibly in connection with the improved checkpoint feature.

Thank you for the clarification.

How come an offchain block is stored on disk ?

I haven't looked at the disk writing code so I don't know what it stores. Given the issues with validation we can't be 100% sure the blocks didn't somehow make it into the chain. Everything is being validated now, so that can't possibly happen (we hope -- after all we are somewhat at the mercy of the bytecoin code until review it -- there is too much to just review everything).

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May 09, 2014, 01:07:46 AM
 #1162

Question: I did not update any of my miners with any of the new builds (e.g. with checkpointing) in the past day or two -- everything I have is from around May 4/5 I think. Does that mean my nodes are clean, or do I have to clear them all out, grab the latest version, and resync on all systems? My PC right now *thinks* it's mining, and it had at least through block 28000 or so prior to these attacks, so I should be safe, right? Will updating at this point benefit me or am I just asking for trouble? (It would be great to add a "version" command in the wallet and daemon -- provided of course that each new build remembers to update the version number.)

The first checkpoint was on May 3rd (see github). It could've started any time after that. So to clarify:

Let's say you started mining this coin on May 1st. You either synched your blockchain.bin from genesis or started from a download. Since then you never deleted that blockchain.bin even if you've updated your daemon/wallet builds (including the ones with checkpoints). In this case you're fine. If you've been mining this whole time without ever updating to the checkpoint versions, then you're also fine.

The other two cases are that you either started mining on/after May 3rd or you started mining before May 3rd but for some reason deleted your blockchain.bin to do a a fresh sync on/after May 3rd. In either of these cases, you need to update.
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May 09, 2014, 01:09:39 AM
 #1163

Someone (C++ skilled) did private optimized miner a few days ago, he got 74H/s for i5 haswell. He pointed that mining code was very unoptimized and he did essential improvements for yourself. So, high H/S is possible yet.
Can the dev's core review code for that?

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May 09, 2014, 01:10:58 AM
 #1164

wondering if the reason I have not gotten any blocks in the last week is because I have been mining on a corrupted blockchain.

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May 09, 2014, 01:12:14 AM
 #1165

wondering if the reason I have not gotten any blocks in the last week is because I have been mining on a corrupted blockchain.

How much hash rate do you have?

Unlikely that the block chain is the issue, as long as you are synced properly. Any problems with the block chain would be with very old blocks (near genesis). Could affect old coin balances but would not affect current mining.

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May 09, 2014, 01:15:59 AM
 #1166

Someone (C++ skilled) did private optimized miner a few days ago, he got 74H/s for i5 haswell. He pointed that mining code was very unoptimized and he did essential improvements for yourself. So, high H/S is possible yet.
Can the dev's core review code for that?

Let me explain a bit about how open source works. Anyone is free to contribute. The lead developer and core team reviews the proposed changes and either adopts them or not. There is at least one of the core team who does work on optimization, and posted some optimizations. I would not be surprised if he develops further optimizations as well.

So if you have proposed code changes, please submit them. Some sort of statement -- backed up by zero evidence -- about a unicorn miner that someone has is not helpful. Every altcoin has these "Kaiser Soze" miners who supposedly have much faster mining code than everybody else. Sometimes it's true and sometimes it isn't. We can't force anyone to contribute their code.



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May 09, 2014, 01:28:44 AM
 #1167

Someone (C++ skilled) did private optimized miner a few days ago, he got 74H/s for i5 haswell. He pointed that mining code was very unoptimized and he did essential improvements for yourself. So, high H/S is possible yet.
Can the dev's core review code for that?

Let me explain a bit about how open source works. Anyone is free to contribute. The lead developer and core team reviews the proposed changes and either adopts them or not. There is at least one of the core team who does work on optimization, and posted some optimizations. I would not be surprised if he develops further optimizations as well.

So if you have proposed code changes, please submit them. Some sort of statement -- backed up by zero evidence -- about a unicorn miner that someone has is not helpful. Every altcoin has these "Kaiser Soze" miners who supposedly have much faster mining code than everybody else. Sometimes it's true and sometimes it isn't. We can't force anyone to contribute their code.


Yeah, I agreed. But it's not me. I saw this info somewhere in russian mining and crypto web forum.
Unfortunately, that guy don't want to push his code for all. I can understand him. Greediness.
May be, this is bullshit or truth. Who knows. Hope we will see next optimizations.

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May 09, 2014, 02:37:45 AM
 #1168

Someone (C++ skilled) did private optimized miner a few days ago, he got 74H/s for i5 haswell. He pointed that mining code was very unoptimized and he did essential improvements for yourself. So, high H/S is possible yet.
Can the dev's core review code for that?

Let me explain a bit about how open source works. Anyone is free to contribute. The lead developer and core team reviews the proposed changes and either adopts them or not. There is at least one of the core team who does work on optimization, and posted some optimizations. I would not be surprised if he develops further optimizations as well.

So if you have proposed code changes, please submit them. Some sort of statement -- backed up by zero evidence -- about a unicorn miner that someone has is not helpful. Every altcoin has these "Kaiser Soze" miners who supposedly have much faster mining code than everybody else. Sometimes it's true and sometimes it isn't. We can't force anyone to contribute their code.

The PoW algorithm needs to be highly optimized from public launch.

Also IMHO, closed source on the PoW algorithm would be best until several weeks of ramp up is complete so clones are too far behind.

Open source is a very effective paradigm for refining (because of the Linus law, "given enough eyeballs, every bug or refinement is shallow"), but it is not as effective at innovation because innovation requires pride+ownership (in one's work), investment of effort, and most of all leadership. Eric Raymond (the creator of the term "open source") opened a discussion on this last year (see the comments):

http://esr.ibiblio.org/?p=4946 (Adobe in cloud-cuckoo land)

For example, how do you plan to decentralize pools? You will need some innovative leadership on an algorithm for that, lest you end up same as Bitcoin with two pools controlling greater than 50% of the network hash power.

Ditto making mining easy enough for grandma to do. Etc.

Does anyone know of any innovative project (created many new killer features) that was created by open source (and not open sourced after those innovative features were completed)?

Btw, Russians are very astute at algorithmic optimization:

http://esr.ibiblio.org/?p=4901 (National styles in hacking)

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May 09, 2014, 02:56:53 AM
 #1169

One more issue comes to mind.

If the leader (lead developer) of an anonymous coin which successfully threatens the banksters' global hegemony over fiat, is not also anonymous, then he can be coerced by the powers-that-be in numerous ways (e.g. tax audit, trumped up criminal charges on something since there are so many laws everyone of us is breaking a federal or EU law every day, etc).

Thus the lead developer can't gain from fame in the usual way of open source projects, e.g. Linus Torvalds.

These issues need to be contemplated BEFORE launching your coin.

If you are only interested in pump and dump, then this issue isn't important. But if you are serious about long-term development and success of the coin, then the issue should be discussed.

If you choose instead a leaderless open source strategy to combat the above issue, then you have the issues of my prior post.

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May 09, 2014, 03:32:42 AM
 #1170

I am trying to optimize the binaries for linux with Intel C++ Composer XE 2013. I'm getting this error.

Code:
[ 33%] Building CXX object src/CMakeFiles/cryptonote_core.dir/cryptonote_core/tx_pool.cpp.o
icpc: command line warning #10006: ignoring unknown option '-Wvla'
icpc: command line warning #10006: ignoring unknown option '-Wlogical-op'
icpc: command line warning #10006: ignoring unknown option '-flto'
/home/ubuntu/bitmonero/src/serialization/binary_archive.h(135): error #63: shift count is too large
          v >>= 8;
                ^
          detected during:
            instantiation of "void binary_archive<true>::serialize_uint(T) [with T=unsigned char]" at line 127
            instantiation of "void binary_archive<true>::serialize_int(T) [with T=unsigned char]" at line 165

 Huh
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May 09, 2014, 03:38:36 AM
 #1171

I am trying to optimize the binaries for linux with Intel C++ Composer XE 2013. I'm getting this error.

Code:
[ 33%] Building CXX object src/CMakeFiles/cryptonote_core.dir/cryptonote_core/tx_pool.cpp.o
icpc: command line warning #10006: ignoring unknown option '-Wvla'
icpc: command line warning #10006: ignoring unknown option '-Wlogical-op'
icpc: command line warning #10006: ignoring unknown option '-flto'
/home/ubuntu/bitmonero/src/serialization/binary_archive.h(135): error #63: shift count is too large
          v >>= 8;
                ^
          detected during:
            instantiation of "void binary_archive<true>::serialize_uint(T) [with T=unsigned char]" at line 127
            instantiation of "void binary_archive<true>::serialize_int(T) [with T=unsigned char]" at line 165

 Huh

That's just the tip of the iceberg :x

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May 09, 2014, 03:41:47 AM
 #1172

Did not understand, careful of understanding Cheesy
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May 09, 2014, 04:02:43 AM
 #1173

I am trying to optimize the binaries for linux with Intel C++ Composer XE 2013. I'm getting this error.

Code:
[ 33%] Building CXX object src/CMakeFiles/cryptonote_core.dir/cryptonote_core/tx_pool.cpp.o
icpc: command line warning #10006: ignoring unknown option '-Wvla'
icpc: command line warning #10006: ignoring unknown option '-Wlogical-op'
icpc: command line warning #10006: ignoring unknown option '-flto'
/home/ubuntu/bitmonero/src/serialization/binary_archive.h(135): error #63: shift count is too large
          v >>= 8;
                ^
          detected during:
            instantiation of "void binary_archive<true>::serialize_uint(T) [with T=unsigned char]" at line 127
            instantiation of "void binary_archive<true>::serialize_int(T) [with T=unsigned char]" at line 165

 Huh

Without looking too closely that looks like a compiler bug to me, or overly aggressive static checking that gets it wrong. Maybe you can turn off that check?

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May 09, 2014, 06:27:23 AM
 #1174

I would like to invest in some of these coins but have tried to download and install the wallet by using the new binaries link but I don't get a wallet as such just some files.

Is there an idiots guide to creating a wallet so I can buy some coins to put in it or is there far more to it than that?

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May 09, 2014, 06:30:16 AM
 #1175

I would like to invest in some of these coins but have tried to download and install the wallet by using the new binaries link but I don't get a wallet as such just some files.

Is there an idiots guide to creating a wallet so I can buy some coins to put in it or is there far more to it than that?

https://bitcointalk.org/index.php?topic=583449.msg6586737#msg6586737

This might help.

This coin is not a bitcoin clone and so it hasnt yet a graphics interface. Its command line for now. But there is a bounty for GUI and soon there must be one...


Remember to backup your wallet once you create it!

Are you on windows or linux btw?
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May 09, 2014, 06:40:09 AM
 #1176

I would like to invest in some of these coins but have tried to download and install the wallet by using the new binaries link but I don't get a wallet as such just some files.

Is there an idiots guide to creating a wallet so I can buy some coins to put in it or is there far more to it than that?

https://bitcointalk.org/index.php?topic=583449.msg6586737#msg6586737

This might help.

This coin is not a bitcoin clone and so it hasnt yet a graphics interface. Its command line for now. But there is a bounty for GUI and soon there must be one...


Remember to backup your wallet once you create it!

Are you on windows or linux btw?

Thanks for your reply and the link. I've already looked through that and it doesn't make much sense to me I'm afraid, perhaps if I spend some time on it later after work it might.

Yes its the graphics interface part that I'm not used to. Must have been spoiled with all the other coins I've tinkered with Smiley.

I'm running Windows 7 64 bit.

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May 09, 2014, 06:48:16 AM
 #1177

I would like to invest in some of these coins but have tried to download and install the wallet by using the new binaries link but I don't get a wallet as such just some files.

Is there an idiots guide to creating a wallet so I can buy some coins to put in it or is there far more to it than that?

https://bitcointalk.org/index.php?topic=583449.msg6586737#msg6586737

This might help.

This coin is not a bitcoin clone and so it hasnt yet a graphics interface. Its command line for now. But there is a bounty for GUI and soon there must be one...


Remember to backup your wallet once you create it!

Are you on windows or linux btw?

Thanks for your reply and the link. I've already looked through that and it doesn't make much sense to me I'm afraid, perhaps if I spend some time on it later after work it might.

Yes its the graphics interface part that I'm not used to. Must have been spoiled with all the other coins I've tinkered with Smiley.

I'm running Windows 7 64 bit.

I dont have Windows unfortunately but i think that all you have to do is:

1. Create a text file on the folder with the files
2. Put the following in the text file:

@echo off

tasklist /FI "IMAGENAME eq bitmonerod.exe" 2>NUL | find /I /N "bitmonerod.exe">NUL
if not %ERRORLEVEL% == 0 (
  echo Starting node...
  start /MIN bitmonerod.exe
) else (
  echo Node already started.
)

tasklist /FI "IMAGENAME eq simplewallet.exe" 2>NUL | find /I /N "simplewallet.exe">NUL
if not %ERRORLEVEL% == 0 (
  if exist wallet.bin.keys (
    echo Starting previous wallet...
    start simplewallet.exe --wallet wallet.bin
  ) else (
    echo Starting new wallet...
    start simplewallet.exe --generate-new-wallet wallet.bin
  )
) else (
  echo Wallet already started.
)



3. Save as the file and where it asks you about name write start.bat
4. Then in the folder a file named start.bat will appear. Just double click it. It will ask you for a password. Put a strong one and remember it! It will be your wallets password.
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May 09, 2014, 07:03:07 AM
 #1178

I would like to invest in some of these coins but have tried to download and install the wallet by using the new binaries link but I don't get a wallet as such just some files.

Is there an idiots guide to creating a wallet so I can buy some coins to put in it or is there far more to it than that?

https://bitcointalk.org/index.php?topic=583449.msg6586737#msg6586737

This might help.

This coin is not a bitcoin clone and so it hasnt yet a graphics interface. Its command line for now. But there is a bounty for GUI and soon there must be one...


Remember to backup your wallet once you create it!

Are you on windows or linux btw?

Thanks for your reply and the link. I've already looked through that and it doesn't make much sense to me I'm afraid, perhaps if I spend some time on it later after work it might.

Yes its the graphics interface part that I'm not used to. Must have been spoiled with all the other coins I've tinkered with Smiley.

I'm running Windows 7 64 bit.

Its very simple, download the windows 64bit binaries and the recent windows blockchain from OP. You will get 4 files in binaries package.

Go to the Users/xxxxx/appdata/roaming/ folder and create a new folder named bitmonero . Put the blockchain file (Which you downloaded) there.

Now start bitmonerod.exe. It will say 'You may now start simplewallet' and 'Synchronized OK' in green when done.

Then start simplewallet.exe , it will ask for wallet name, choose your name, then enter password (REMEMBER IT)

It will generate a new wallet address

No you can start receiving coins. PM me if you need any help
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May 09, 2014, 07:07:10 AM
 #1179

I would like to invest in some of these coins but have tried to download and install the wallet by using the new binaries link but I don't get a wallet as such just some files.

Is there an idiots guide to creating a wallet so I can buy some coins to put in it or is there far more to it than that?

https://bitcointalk.org/index.php?topic=583449.msg6586737#msg6586737

This might help.

This coin is not a bitcoin clone and so it hasnt yet a graphics interface. Its command line for now. But there is a bounty for GUI and soon there must be one...


Remember to backup your wallet once you create it!

Are you on windows or linux btw?

Thanks for your reply and the link. I've already looked through that and it doesn't make much sense to me I'm afraid, perhaps if I spend some time on it later after work it might.

Yes its the graphics interface part that I'm not used to. Must have been spoiled with all the other coins I've tinkered with Smiley.

I'm running Windows 7 64 bit.

I dont have Windows unfortunately but i think that all you have to do is:

1. Create a text file on the folder with the files
2. Put the following in the text file:

@echo off

tasklist /FI "IMAGENAME eq bitmonerod.exe" 2>NUL | find /I /N "bitmonerod.exe">NUL
if not %ERRORLEVEL% == 0 (
  echo Starting node...
  start /MIN bitmonerod.exe
) else (
  echo Node already started.
)

tasklist /FI "IMAGENAME eq simplewallet.exe" 2>NUL | find /I /N "simplewallet.exe">NUL
if not %ERRORLEVEL% == 0 (
  if exist wallet.bin.keys (
    echo Starting previous wallet...
    start simplewallet.exe --wallet wallet.bin
  ) else (
    echo Starting new wallet...
    start simplewallet.exe --generate-new-wallet wallet.bin
  )
) else (
  echo Wallet already started.
)



3. Save as the file and where it asks you about name write start.bat
4. Then in the folder a file named start.bat will appear. Just double click it. It will ask you for a password. Put a strong one and remember it! It will be your wallets password.

That's great thank you very much.

I've now got 2 command windows open, the first one (bitmonerod.exe) looks like its downloading the blockchain (black background with yellow scrolling text) and the second window (simplewallet.exe) has my wallet info at the top and a command prompt ([wallet ******]Smiley.

I assume that I now just have to wait for the blockchain to download?

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May 09, 2014, 07:10:46 AM
 #1180

I would like to invest in some of these coins but have tried to download and install the wallet by using the new binaries link but I don't get a wallet as such just some files.

Is there an idiots guide to creating a wallet so I can buy some coins to put in it or is there far more to it than that?

https://bitcointalk.org/index.php?topic=583449.msg6586737#msg6586737

This might help.

This coin is not a bitcoin clone and so it hasnt yet a graphics interface. Its command line for now. But there is a bounty for GUI and soon there must be one...


Remember to backup your wallet once you create it!

Are you on windows or linux btw?

Thanks for your reply and the link. I've already looked through that and it doesn't make much sense to me I'm afraid, perhaps if I spend some time on it later after work it might.

Yes its the graphics interface part that I'm not used to. Must have been spoiled with all the other coins I've tinkered with Smiley.

I'm running Windows 7 64 bit.

I dont have Windows unfortunately but i think that all you have to do is:

1. Create a text file on the folder with the files
2. Put the following in the text file:

@echo off

tasklist /FI "IMAGENAME eq bitmonerod.exe" 2>NUL | find /I /N "bitmonerod.exe">NUL
if not %ERRORLEVEL% == 0 (
  echo Starting node...
  start /MIN bitmonerod.exe
) else (
  echo Node already started.
)

tasklist /FI "IMAGENAME eq simplewallet.exe" 2>NUL | find /I /N "simplewallet.exe">NUL
if not %ERRORLEVEL% == 0 (
  if exist wallet.bin.keys (
    echo Starting previous wallet...
    start simplewallet.exe --wallet wallet.bin
  ) else (
    echo Starting new wallet...
    start simplewallet.exe --generate-new-wallet wallet.bin
  )
) else (
  echo Wallet already started.
)



3. Save as the file and where it asks you about name write start.bat
4. Then in the folder a file named start.bat will appear. Just double click it. It will ask you for a password. Put a strong one and remember it! It will be your wallets password.

That's great thank you very much.

I've now got 2 command windows open, the first one (bitmonerod.exe) looks like its downloading the blockchain (black background with yellow scrolling text) and the second window (simplewallet.exe) has my wallet info at the top and a command prompt ([wallet ******]Smiley.

I assume that I now just have to wait for the blockchain to download?

Yup.
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