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What do these parameters do and what to insert there

        uint256S("00000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); //what this do ? end what put to here

        consensus.nRuleChangeActivationThreshold = 6048; // 75% of 8064 //what this do end what put ?
        consensus.nMinerConfirmationWindow = 8064; // nPowTargetTimespan / nPowTargetSpacing * 4  //what this do ?
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28; //what this setting's do ? 
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1199145601; // January 1, 2008
        consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008

        // Deployment of BIP68, BIP112, and BIP113.
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1485561600; // January 28, 2017
        consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1517356801; // January 31st, 2018

        // Deployment of SegWit (BIP141, BIP143, and BIP147)
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1485561600; // January 28, 2017
        consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 1517356801; // January 31st, 2018

        // The best chain should have at least this much work.
        consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000000000006805c7318ce2736c0"); //what this do end what put here ?

        // By default assume that the signatures in ancestors of this block are valid.
        consensus.defaultAssumeValid = uint256S("0x1673fa904a93848eca83d5ca82c7af974511a7e640e22edc2976420744f2e56a"); //1155631  //what this do ?

        nPruneAfterHeight = 100000;  //what this do ?

i need to reconfigure exist coin to new wallet but stuck on this param's.

For all who down vote question, i try find about this param info , but do not find anything, or you simple down vote what you do not understand ?

I understand it's start end time out time. But how it work's.

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1 Answer 1

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uint256S("00000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); //what this do ? end what put to here

The first line describes a minimum difficulty.

consensus.nRuleChangeActivationThreshold = 6048; // 75% of 8064 //what this do end what put ?
consensus.nMinerConfirmationWindow = 8064; // nPowTargetTimespan / nPowTargetSpacing * 4  //what this do ?

The next two lines say that rule changes require 75% agreement, measured across 4 retargeting periods.

consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28; //what this setting's do ? 
consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nStartTime = 1199145601; // January 1, 2008
consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008

// Deployment of BIP68, BIP112, and BIP113.
consensus.vDeployments[Consensus::DEPLOYMENT_CSV].bit = 0;
consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nStartTime = 1485561600; // January 28, 2017
consensus.vDeployments[Consensus::DEPLOYMENT_CSV].nTimeout = 1517356801; // January 31st, 2018

// Deployment of SegWit (BIP141, BIP143, and BIP147)
consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].bit = 1;
consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nStartTime = 1485561600; // January 28, 2017
consensus.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout = 1517356801; // January 31st, 2018

The next eleven lines describe the minimum and maximum times that three softforks can activate, and how they are to be signaled using version bits.

// The best chain should have at least this much work.
consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000000000006805c7318ce2736c0"); //what this do end what put here ?

The next two lines specify the minimum amount of chain work that a client must have before it will consider itself synchronized. 

// By default assume that the signatures in ancestors of this block are valid.
consensus.defaultAssumeValid = uint256S("0x1673fa904a93848eca83d5ca82c7af974511a7e640e22edc2976420744f2e56a"); //1155631  //what this do ?

The next two lines disables signature checks on blocks that are ancestors of the block specified by that block hash.

nPruneAfterHeight = 100000;  //what this do ?

The next two lines disable block pruning on blocks below a certain height. In Bitcoin, this is because most of the initial blocks are empty. This is documented in this commit.

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  • about 2 , how i understand it's it's in time block *4 but it's on minute or second's if i have block time 2 minutes . consensus.nPowTargetTimespan = 10 * 60; // 10 minute consensus.nPowTargetSpacing = 5 * 60; //5 minute i need put the 8 or how сcalculate this parameter right correctly
    – tseries
    Jul 26, 2017 at 5:22
  • @tseries Neither, it's expressed in terms of blocks.
    – Nick ODell
    Jul 26, 2017 at 5:23
  • this i understand but if use this rule i have 8 second, i think it's to low. Whether this value is claimed on these parameters or it can be any value.
    – tseries
    Jul 26, 2017 at 5:29
  • @tseries Decreasing that value makes a rule change activate faster. Increasing it makes a rule change activate more slowly.
    – Nick ODell
    Jul 26, 2017 at 5:31

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