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    Author Topic: [ANN] official NovaCoin thread - the original PoS+scrypt coin.  (Read 282750 times)

    • Balthazar
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    January 12, 2014, 08:01:19 PM
    Last edit: January 13, 2014, 12:02:21 AM by Balthazar
     #1001
    Quote from: Eugen3 on January 12, 2014, 06:56:36 PM
    Which do you think would be most beneficial to the coin?
    I think that it's all about balance.  Smiley Traders and miners are parts of self-regulated system.

    Quote from: Eugen3 on January 12, 2014, 06:56:36 PM
    I think it is safe to say that there are currently scrypt FPGAs in the wild or at least a dump truck full of new GPUs mining scrypt from profits of the past months.  As these FPGAs start to ship out, the NVC difficulty will more than likely increase which will make the block reward smaller.  Anyone else think we will see < 1 NVC PoW block reward in 2014?  Talk about a rare coin!
    For the reward lower than 1.00 we need a difficulty higher than 240000000. I doubt that it's possible in 2014. Roll Eyes

    Code:
    Difficulty Reward

    500 8.872989
    1000 7.904935
    2000 7.042496
    3000 6.582306
    4000 6.274151
    5000 6.045097
    6000 5.864168
    7000 5.715426
    8000 5.589633
    9000 5.480975
    10000 5.385569
    20000 4.797996
    30000 4.484473
    40000 4.274529
    50000 4.118476
    60000 3.995211
    70000 3.893874
    80000 3.808172
    90000 3.734145
    100000 3.669145
    100000 3.669145
    200000 3.268837
    300000 3.055235
    400000 2.912202
    500000 2.805885
    600000 2.721905
    700000 2.652865
    800000 2.594477
    900000 2.544043
    1000000 2.499759
    2000000 2.227032
    3000000 2.081508
    4000000 1.984060
    5000000 1.911627
    6000000 1.854412
    7000000 1.807376
    8000000 1.767597
    9000000 1.733236
    10000000 1.703066
    20000000 1.517259
    30000000 1.418114
    40000000 1.351724
    50000000 1.302376
    60000000 1.263396
    70000000 1.231351
    80000000 1.204249
    90000000 1.180840
    100000000 1.160285


    Anyway, we can change PoW reward function to make a reward drop slower or faster, if this would be requested by majority of users... But this would require a voting like it happened with PoS reward function before.

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    January 13, 2014, 12:46:52 AM
    Last edit: January 13, 2014, 01:17:27 AM by Balthazar
     #1002
    Quote from: Balthazar on January 12, 2014, 10:29:16 AM
    Experimental builds are updated again.  [AMD64  | i686 | src]

    Changes list:

    • Core: New proof-of-stake miner implementation. Performance issues resolved, almost 100x faster with massive inputs amount;
    • Qt: Coinbase/coinstake transaction records appearance unification;
    • Lib: update to Berkeley DB 6.0.20.
    Stress test in the TestNet

    http://s006.radikal.ru/i213/1401/21/22b9e8099046.png

    Proof-of-Work and Proof-of-Stake mining using more than 1 million coins and almost 20k transactions. Stake miner eats one CPU core but there is absolutely no performance issues.  Cool

    It actually doesn't matter, but we'll try to decrease CPU usage in the future.

  • boinc
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    January 13, 2014, 03:41:57 AM
     #1003
    Quote from: Balthazar on January 13, 2014, 12:46:52 AM
    http://s006.radikal.ru/i213/1401/21/22b9e8099046.png
    Wow such balance many input  Smiley
    BTC 12P9LaA7eciiPCx68qFEFarpfrF8mcrNmY

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    January 13, 2014, 04:59:45 AM
    Last edit: January 13, 2014, 11:51:34 AM by Balthazar
     #1004
    how fast so crypto Grin

    // I've just thought about selling nootropic medicines for some NVC... I have 1kg of Piracetam and I think that it's really too much  Roll Eyes

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    January 15, 2014, 12:24:47 AM
     #1005
    Quote from: Balthazar on January 12, 2014, 10:29:16 AM
    Experimental builds are updated again.  [AMD64  | i686 | src]

    Changes list:

    • Core: New proof-of-stake miner implementation. Performance issues resolved, almost 100x faster with massive inputs amount;
    • Qt: Coinbase/coinstake transaction records appearance unification;
    • Lib: update to Berkeley DB 6.0.20.
    And again... Smiley

    • Core: Proof-of-Stake miner optimizations and cleanup;
    • Core: Remove BDB support;
    • Core: Automatically remove old transactions index database if that's necessary, no runaway exceptions anymore.

    P.S. Mac OS X build was replaced too.

  • glendall
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    January 17, 2014, 09:38:15 PM
     #1006
    Quote from: Balthazar on January 13, 2014, 04:59:45 AM
    how fast so crypto Grin

    // I've just thought about selling nootropic medicines for some NVC... I have 1kg of Piracetam and I think that it's really too much  Roll Eyes

    Hahah where does a person get a spare kilogram of piracetam from ? Haha Smiley    No need to answer that, actually. But that's funny.

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    January 18, 2014, 08:35:28 PM
    Last edit: January 19, 2014, 05:55:58 AM by Balthazar
     #1007
    Testing branch has been updated.

    https://github.com/CryptoManiac/novacoin/tree/novacoin-next

    screenshot

    Switch to unspent coins approach

    This commit replaces old transactions index with unspent coins database
    which contains a basic metadata like heights, amounts, coinstake/coinbase 
    flags and timestamps.

    We still need access to blockchain for proof-of-stake blocks validation. 
    Currently CheckProofOfStake() uses the coin database to find the block height, 
    and then scans that block to find the dependency of coinstake kernel.


    Batch block connection during initial block download

    This reduces the load on the database engine, as subsequent blocks often
    update an earlier block's transaction already.


    As a result we've got a significantly smaller (~30% drop of size) and faster database.

    Windows binaries will be published soon.

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    January 18, 2014, 08:49:44 PM
     #1008
    Quote from: glendall on January 17, 2014, 09:38:15 PM
    Hahah where does a person get a spare kilogram of piracetam from ? Haha Smiley    No need to answer that, actually. But that's funny.
    Cheesy

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    January 19, 2014, 05:59:40 AM
    Last edit: January 19, 2014, 02:04:13 PM by Balthazar
     #1009
    Quote from: Balthazar on January 18, 2014, 08:35:28 PM
    Testing branch has been updated.

    https://github.com/CryptoManiac/novacoin/tree/novacoin-next

    screenshot

    Switch to unspent coins approach

    This commit replaces old transactions index with unspent coins database
    which contains a basic metadata like heights, amounts, coinstake/coinbase 
    flags and timestamps.

    We still need access to blockchain for proof-of-stake blocks validation. 
    Currently CheckProofOfStake() uses the coin database to find the block height, 
    and then scans that block to find the dependency of coinstake kernel.


    Batch block connection during initial block download

    This reduces the load on the database engine, as subsequent blocks often
    update an earlier block's transaction already.


    As a result we've got a significantly smaller (~30% drop of size) and faster database.

    Windows binaries will be published soon.
    [AMD64  | i686 | src]

    Please note that this feature is extremely experimental ATM, some parts of functionality weren't tested very well.

    Update: binaries were rebuilt from latest snapshot. No broadcasting attempts of orphaned coinstake txns anymore.

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    January 20, 2014, 12:26:50 AM
    Last edit: January 20, 2014, 10:48:31 AM by Balthazar
     #1010
    Quote from: Balthazar on January 19, 2014, 05:59:40 AM
    Quote from: Balthazar on January 18, 2014, 08:35:28 PM
    Testing branch has been updated.

    https://github.com/CryptoManiac/novacoin/tree/novacoin-next

    screenshot

    Switch to unspent coins approach

    This commit replaces old transactions index with unspent coins database
    which contains a basic metadata like heights, amounts, coinstake/coinbase 
    flags and timestamps.

    We still need access to blockchain for proof-of-stake blocks validation. 
    Currently CheckProofOfStake() uses the coin database to find the block height, 
    and then scans that block to find the dependency of coinstake kernel.


    Batch block connection during initial block download

    This reduces the load on the database engine, as subsequent blocks often
    update an earlier block's transaction already.


    As a result we've got a significantly smaller (~30% drop of size) and faster database.

    Windows binaries will be published soon.
    [AMD64  | i686 | src]

    Please note that this feature is extremely experimental ATM, some parts of functionality weren't tested very well.

    Update: binaries were rebuilt from latest snapshot. No broadcasting attempts of orphaned coinstake txns anymore.
    Updated again.

    • Don't process PoS block coinbase in the ConnectBlock()/DisconnectBlock(), ~3-4mb smaller database size;
    • Known issues with reorganize and PoS miner has been fixed.

    Update: issue suspected with validation of coinstake signature in block #69484, we can't reproduce it but "-next" builds were removed for now.

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    January 21, 2014, 09:26:39 PM
     #1011
    Quote from: Balthazar on January 20, 2014, 12:26:50 AM
    Update: issue suspected with validation of coinstake signature in block #69484, we can't reproduce it but "-next" builds were removed for now.
    Fixed, new builds will be published later.

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    January 22, 2014, 06:59:06 PM
     #1012
    I am completely new to NVC... downloaded the latest win client v0.4.4.6 and getting the following error on launch:



    Any ideas? Thanks!

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    January 22, 2014, 08:10:09 PM
     #1013
    Quote from: glon on January 22, 2014, 06:59:06 PM
    I am completely new to NVC... downloaded the latest win client v0.4.4.6 and getting the following error on launch:



    Any ideas? Thanks!
    https://bt.irlbtc.com/view/143221.msg4310529#msg4310529

    Quote
    Q: Why I'm getting runaway exception while trying to start 0.4.4.6 client?

    A: That's normal, it's happened because 0.4.4.6 update makes blockindex code incompatible with previous versions. You need to remove old blockchain files and resyncronize with a rest of the network.

    Q: How to remove the old blockchain database files?

    A: You need to remove everything except wallet.dat from your client data directory. Data directory is located at

    Windows Vista/7/8/2008 Server: C:\Users\<UserName>\AppData\Roaming\NovaCoin
    Windows 2000/XP: C:\Documents and Settings\<UserName>\Application Data\NovaCoin
    Linux/*BSD: ~/.novacoin

  • glon
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    January 22, 2014, 08:27:37 PM
     #1014
    Quote from: Balthazar on January 22, 2014, 08:10:09 PM
    Quote from: glon on January 22, 2014, 06:59:06 PM
    I am completely new to NVC... downloaded the latest win client v0.4.4.6 and getting the following error on launch:



    Any ideas? Thanks!
    https://bt.irlbtc.com/view/143221.msg4310529#msg4310529

    Quote
    Q: Why I'm getting runaway exception while trying to start 0.4.4.6 client?

    A: That's normal, it's happened because 0.4.4.6 update makes blockindex code incompatible with previous versions. You need to remove old blockchain files and resyncronize with a rest of the network.

    Q: How to remove the old blockchain database files?

    A: You need to remove everything except wallet.dat from your client data directory. Data directory is located at

    Windows Vista/7/8/2008 Server: C:\Users\<UserName>\AppData\Roaming\NovaCoin
    Windows 2000/XP: C:\Documents and Settings\<UserName>\Application Data\NovaCoin
    Linux/*BSD: ~/.novacoin

    I am running the "portable" nosetup version though...

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    January 22, 2014, 09:48:25 PM
    Last edit: January 22, 2014, 11:20:17 PM by Balthazar
     #1015
    Quote from: glon on January 22, 2014, 08:27:37 PM
    I am running the "portable" nosetup version though...
    It doesn't matter if you haven't specified data directory path manually. It tries to load transactions database from %UserProfile%\AppData\Roaming\NovaCoin folder. Roll Eyes

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    January 23, 2014, 01:33:09 AM
    Last edit: January 24, 2014, 09:48:19 PM by Balthazar
     #1016
    Testing builds were updated.

    Changes list:

    • Refactoring of Proof-of-Stake checkings code;
    • Remove some redundant messages from debug.log output;
    • Make stake related DoS checkings harder;
    • Database code is updated, direct CCoins links approach is implemented to decrease count of worthless flush and copy events;
    • Initial block download optimization, transaction hashes are cached now to make blocks validation faster;
    • Multiple CChainDB instantiations were replaced with a single CBlockTreeDB instance;
    • CCoinsDB and CBlockTreeDB are updated to use LevelDB storage;
    • gettxout and gettxoutsetinfo RPC calls added;
    • getblock and getblockbynumber RPC calls are now providing generator public key for proof-of-stake blocks.

    Download [AMD64  | i686 | src]

    Additional notes:

    • This builds should be considered as pre-release, i.e. it could be used for a new release if there will be no new critical issues;
    • If you see zero balance after updating then execute repairwallet command using RPC console and restart your client.

    ------

    Quote
    getblock 2f942cad0019a69cc83e9cfbdb65dcad7f8ed81eca2b027b2fa490f71f75e7af
    {
        "hash" : "2f942cad0019a69cc83e9cfbdb65dcad7f8ed81eca2b027b2fa490f71f75e7af",
        "confirmations" : 60393,
        "size" : 1146,
        "height" : 10022,
        "version" : 2,
        "merkleroot" : "6950c20fca1f4b3091cc274ba4c0cc37e86927431814e9a927cca81ab50e5441",
        "mint" : 0.25000000,
        "time" : 1363070975,
        "nonce" : 0,
        "bits" : "1e0fffff",
        "difficulty" : 0.00024414,
        "blocktrust" : "100001",
        "chaintrust" : "102727",
        "previousblockhash" : "0000000000e5885d4087ab52b37d81baf28b4b58231402cfd9fe6d4946edacf8",
        "nextblockhash" : "00000000072940ff4f46eabace834d681fd20488034517acdc13c8ec7b2771d3",
        "flags" : "proof-of-stake stake-modifier",
        "proofhash" : "000018d0aa7d744d1c92e2ed0d3b9b2ea313e4a6e72fc7013b6bbebbd414eaf9",
        "entropybit" : 1,
        "modifier" : "a736cfbe4e9a6031",
        "modifierchecksum" : "fede5a20",
        "tx" : [
            "7473c894134d83bf4a0a5207310520c12edb9bf69411e27b672d77a847d553a0",
            "01c4dea3d857183a43c126cf34f232bfd2453d3f8f78195b211d9e7a3544a31d",
            "578f2a5464c6f4beade6ea0627c4dc4f3f486d52affe3b24e3f3db349b1d7582",
            "41de352ef0b8f1c3cd2dcf3837c4429a43aaebb8cda12a608f8b3dbd896dc76b",
            "fb725604b226f8e59aeb07ec21c775f2bd8e3d2033ed46f4562e71b43427cfbf"
        ],
        "generator" : "02afed4a3e2473670ea7a93d61e9fcc883e308812769ff9135a6819b1bccc6486d",
        "signature" : "304402207f5985ec8b0e2f034d0ace6a0105d371a0acdf82ea64fca8f0e4bd58a6dcd5a902201e1 0950ef5816402822a7e0ffd078cf3bfd985e015fc032e23febd899110b294"
    }

    Quote
    gettxoutsetinfo
    {
        "bestblock" : "6cdbb76beb4ccf8a3c1a5dc5f1bcd3728c80cd1b98fa72b6926e2243acdd18f1",
        "transactions" : 56978,
        "txouts" : 90709,
        "bytes_serialized" : 4375823
    }

    Quote
    gettxout 01c4dea3d857183a43c126cf34f232bfd2453d3f8f78195b211d9e7a3544a31d 0
    {
        "bestblock" : "6cdbb76beb4ccf8a3c1a5dc5f1bcd3728c80cd1b98fa72b6926e2243acdd18f1",
        "confirmations" : 60394,
        "amount" : 0,
        "scriptPubKey" : {
            "asm" : "",
            "hex" : ""
        },
        "version" : 1,
        "coinbase" : false,
        "coinstake" : true
    }

  • Balthazar
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    January 24, 2014, 09:41:23 PM
     #1017
    Quote from: Balthazar on January 20, 2014, 12:26:50 AM
    Download [AMD64  | i686 | src]

    Additional notes:

    • This builds should be considered as pre-release, i.e. it could be used for a new release if there will be no new critical issues;
    • If you see zero balance after updating then execute repairwallet command using RPC console and restart your client.
    Rebuilt and uploaded.

    Changes list is pretty small:

    • Changes done by repairwallet RPC command now applied on the fly, so it's not required to restart client after integrity checkings;
    • Block and transaction timestamps were added to gettxout RPC command output.

    Download [AMD64  | i686 | src]

    -----

    Quote
    gettxout 01c4dea3d857183a43c126cf34f232bfd2453d3f8f78195b211d9e7a3544a31d 0
    {
        "bestblock" : "6cdbb76beb4ccf8a3c1a5dc5f1bcd3728c80cd1b98fa72b6926e2243acdd18f1",
        "confirmations" : 60394,
        "amount" : 0,
        "scriptPubKey" : {
            "asm" : "",
            "hex" : ""
        },
        "version" : 1,
        "coinbase" : false,
        "coinstake" : true,
       "time" : 1363070975,
        "blocktime" : 1363070975
    }

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    January 25, 2014, 10:43:50 AM
    Last edit: January 25, 2014, 01:08:43 PM by Balthazar
     #1018
    Deterministic wallets status.

    WD wallets support is already implemented in the novacoin-hdkeys testing branch and works pretty well. So it's planned for integration into upcoming 0.4.4.8 release, but with one little change

    According to testing results we shouldn't abandon the keypool approach. Instead of this we have to implement a separate and deterministic key pools for required purposes (receive, mining and change addresses).

    As a result we've got this:

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    January 26, 2014, 12:33:46 AM
    Last edit: January 26, 2014, 12:55:01 AM by Balthazar
     #1019
    Quote from: Balthazar on January 24, 2014, 09:41:23 PM
    Download [AMD64  | i686 | src]

    Additional notes:

    • This builds should be considered as pre-release, i.e. it could be used for a new release if there will be no new critical issues;
    • If you see zero balance after updating then execute repairwallet command using RPC console and restart your client.
    Rebuilt again.

    [AMD64  | i686 | src]

    • Winsock related compiler warnings are fixed;
    • You don't need repairwallet after upgrading anymore, wallet consistency being restored automatically during initial download process.

    I guess that it's a last testing build and v0.4.4.7 will be released at monday.

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    January 26, 2014, 03:00:59 PM
     #1020
    Is the p2pool software incompatible with the current version of novacoin or something?

    Running the p2pool gives me this:
    Code:
    Cme@mycomputer:~/p2pool-11.4.3$ python run_p2pool.py
    fatal: Not a git repository (or any of the parent directories): .git
    2014-01-26 09:52:46.939552 p2pool (version 11.4.3)
    2014-01-26 09:52:46.939911
    2014-01-26 09:52:46.940105 Testing bitcoind RPC connection to 'http://127.0.0.1:8344/' with username 'bitcoinrpc'...
    2014-01-26 09:52:46.965543     ...success!
    2014-01-26 09:52:46.965719     Current block hash: ed546b552e694ef3b192325acb663258611bc00c7b7c48fafbe11c6fc3e01381
    2014-01-26 09:52:46.965787     Current block height: 70799
    2014-01-26 09:52:46.965832
    2014-01-26 09:52:46.965911 Testing bitcoind P2P connection to '127.0.0.1:7777'..
    (and it stalls here)

    I'm running p2pool 11.4.3 and novacoind 0.4.4.6, both compiled from github running on Ubuntu 13.04
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