[ANN] microCoin MRC - alcurEX - Scrypt-Jane - nFactor

[KickAzzDude]

Wow randywald is a huge MRC supporter and to see him giving up should make the devs realize they need to change something. More communication and updates on what is going on, ask for help from the community if you need. I don't own too much MRC but I am part of the Alcurex shareholders and starting to get disappointed in the progress. You guys raised 70 btc in shares, could have hired some competent people to make the exchange but cheaped out and they left a mess that halibit has slowly been fixing. If the exchange would have gone well you still had another ~70k shares to sell which would have been great profit as interest would rise and they would become more valuable.

[1714042409]

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[1714042409]

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[shango]

I was a big supporter as well.
I wonder if i should sell out all i have left for pennies or move them to alcureX. Looking at the volumes at alcurEX i wonder if it makes any sense at all.

[guidosuller]

goodbye mintpal...!!! tell for habilit and MRC in bahamas!!!

[shango]

finally some MRC action on alcurEX

[Little_boo]

finally some MRC action on alcurEX

dump?

[netris]

soon heading towards 1 latoshi, expecting 1 shibetoshi

What are you talking about? We still have MRC/ BTC pair. MRC on Poloniex is still alive. -> https://poloniex.com/exchange/btc_mrc
Only what we need is some innovations.. or simply some useful features.

We need holders to animate or stimulate this coin. BTW. Guys from FINLAND sucks! They are simply unreliable - OR SHOW US THAT WE ARE WRONG!

[randywald]

Hi. I'm still here holding 300 million coins . I would be able to manage this coin and give daily updates if i had someone to do the coding. It would be my biggest wish to do some management here. I gave instructions to halibit and he thanked me for that. I hope he can change something in the near future. In my view, the biggest problem is the "pennies" coin in mrc market which is absolutely worthless. The wallet didn't even sync correctly on my pc when i tried it .

Currently i'm only cpu mining (pentium g3220) because i can't afford mining with 1000 or something watts of power usage anymore.
But i still have 2 R9 270 left which can be used again if needed.

Some weeks ago, there was a guy who said that he can fix the wallet startup problems. Is he still here? We need him. I will donate him plenty for fixing that problem. Please tell me if you are able to do that. Thank you.

Edit: What was the name of the guy? I don't find his last post again.

with kind regards,
randywald

[cryptofrance]

Hi guys,

Do you know how to deposit MRC on Alcurex ? All I have on the "finance page" once logged in is a QR code that doesn't produce any effect. No deposit address is shown in the usual text format 1Ai7......
And when I try to generate a new address, nothing happens (I'm using Chrome).

Thanks for your help !

[netris]

Hi,
1. You should ask in Alcurex topic
2. Scandinavians likes to take one-month-long summer-holidays, so it is highly possible that your question will stay without response for a while..

[randywald]

Hi,

for problems just use the chatbox of alcurEX. It's been always the fastest way for me and i got all problems solved in time.

[halibit]

Hi guys,

Do you know how to deposit MRC on Alcurex ? All I have on the "finance page" once logged in is a QR code that doesn't produce any effect. No deposit address is shown in the usual text format 1Ai7......
And when I try to generate a new address, nothing happens (I'm using Chrome).

Thanks for your help !

We are change servers from US to EU and need to make new servers.
MRC and CENT wallets are still on progress.

We copy old wallet on new server, so old address are valid.

[CaptEmulation]

Some weeks ago, there was a guy who said that he can fix the wallet startup problems. Is he still here? We need him. I will donate him plenty for fixing that problem. Please tell me if you are able to do that. Thank you.

Hi, that was me.  I didn't claim I could fix MRC start-up, only that I was working on a similar problem for another old alt-coin wallet (Lebowskis/LBW).  I have a branch of Lebowskis with many v0.8.x Bitcoin fixes applied.  It was a lot of work, and I do have everything compiling and linking.  There is new start-up code applied, and I am currently throwing an assert in there causing the application to quit immediately.  My hope was that once I was able to get these patches to work there I would also try to apply them to MRC.  This is unlikely to happen for a few weeks at best, namely because I'll be doing some summer vacation soon.

On a related note, for both LBW and MRC-- wallets with many transactions also experience additional slowness in the form of the wallet beginning to take 100% of single CPU.  This is due to wallet verifying new blocks/transactions vs thousands of private keys.  New wallets handle this more efficiently, but still ultimately also need to carry out the comparisons.  I had this LBW wallet with about ~14,000 transactions which besides being pegged at 100% CPU usage, first slowed down then stopped functioning (beyond expected timeouts).  I had not ever done this before, but I needed to "Sweep" all of my transactions from the wallet.  I did it all the coding myself, and that wallet took 7 or 8 full-block-sized transactions, but I was able to get it done and now the wallet is purring along at 10-20% CPU usage, which is reasonable for an active wallet.

So, for anyone having troubles with wallet with lots of transactions-- you need to sweep those transaction into one giant block, which will reduce the overhead of the wallet and marginally increase start-up time as well.  Here is what I used: https://github.com/CaptEmulation/bitcoin-rpc-sweep.  I have not tested on MRC, but it should work with any bitcoin RPC.  I'll test it with MRC later today.

[randywald]

Wallet startup time is exponential proportional with the current number of blocks. I've checked that today with a new wallet (without any transactions). So in my view the number of transactions is not relevant or only has a small influence on startup time.

CaptEmulation: Thank you that you will test the "sweeping" of transactions.

[CaptEmulation]

You are correct, I can confirm that after sweeping my MRC wallet, the start-up time remains the same.  Oh well, it will at least improve runtime performance.

[randywald]

Ok, thanks for testing. So my question: Is there a function to tell the client on startup to skip scanning all the blocks or to skip that what takes so much time? Can the wallet be used as a "lite wallet" without all the blockchain or so? Thank you.

[CaptEmulation]

Ok, thanks for testing. So my question: Is there a function to tell the client on startup to skip scanning all the blocks or to skip that what takes so much time? Can the wallet be used as a "lite wallet" without all the blockchain or so? Thank you.

I think I have a handle on why the loading is so slow.  Since microcoin is based (however loosely) on Bitcoin-Qt, it has a full blockchain and creates an index in memory during the "Loading Block Index" phase.  I imagine for security sake, the hashes of the blocks do not appear to be stored in the blkindex.dat, which maps location of blocks in the blknnnn.dat files.  Thusly, while loading the block index in memory, the hashes of all blocks are calculated.  For Scrypt-jane at high N-factor, this takes thousands of times longer than a SHA256d hash and is the reason why start-up time is slow.

My proposal is to go ahead and save the hashes in the blkindex.dat file alongside the index and simply load from the db.  This requires a few considerations/possibilities: 1) update-in-place an old blkindex.dat file 2) require blockchain be discarded and re-downloaded 3) offer a command line option to to hash validation 4) spawn a thread to check the hashes after loading from disk, and report any errors later.

For a full node, calculating the hashes is important because it validates the block chain has not been tampered with.  However, due to the complexity of Scrypt-jane with modified N-factor, we need to cache the hashes in order to be able to start quickly.

With that in mind, I do think I can put together a solution specific for this issue, without all of the coin control, multi-wallet and multi-sig changes I have been analyzing separately.  However, I promise no time frame because I have many other things on my plate and because summer vacation.

[shango]

soon heading towards 1 latoshi, expecting 1 shibetoshi

What are you talking about? We still have MRC/ BTC pair. MRC on Poloniex is still alive. -> https://poloniex.com/exchange/btc_mrc
Only what we need is some innovations.. or simply some useful features.

Last trade on poloniex was in mid-june ....

[jorrr]

very dead very yes such shame such 1 shibetoshi soon

[netris]

soon heading towards 1 latoshi, expecting 1 shibetoshi

What are you talking about? We still have MRC/ BTC pair. MRC on Poloniex is still alive. -> https://poloniex.com/exchange/btc_mrc
Only what we need is some innovations.. or simply some useful features.

Last trade on poloniex was in mid-june ....

Lets play in "troll or asshole"...

2014-07-30 18:43:25   Buy   0.00000001   1030000   0.0103
2014-07-23 15:35:56   Buy   0.00000001   87066   0.00087066
2014-07-23 12:20:39   Buy   0.00000001   10000   0.0001
2014-07-10 08:07:12   Buy   0.00000001   11017   0.00011017
2014-07-07 13:10:38   Buy   0.00000001   10000   0.0001
2014-07-02 20:14:09   Buy   0.00000001   1732370   0.0173237
2014-07-02 09:12:33   Buy   0.00000001   180000   0.0018
2014-07-02 00:21:37   Buy   0.00000001   700000   0.007
2014-07-01 20:31:23   Buy   0.00000001   132489   0.00132489

Tell us, someone pays you for disinformation?

[aikklond]

I think we should press for XMR market in poloniex... what do you people think?