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

<p>The first line describes a minimum difficulty.</p>

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

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

<pre><code>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
</code></pre>

<p>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.</p>

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

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

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

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

<pre><code>nPruneAfterHeight = 100000;  //what this do ?
</code></pre>

<p>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 <a href="https://github.com/bitcoin/bitcoin/commit/f9ec3f0fadb11ee9889af977e16915f5d6e01944" rel="nofollow noreferrer">this commit</a>.</p>

CC BY-SA 3.0
2017-07-26T05:22:28.743Z
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
CC BY-SA 3.0
2017-07-26T05:23:13.770Z
@tseries Neither, it's expressed in terms of blocks.
Nick ODell
CC BY-SA 3.0
2017-07-26T05:29:00.743Z
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
CC BY-SA 3.0
2017-07-26T05:31:52.707Z
@tseries Decreasing that value makes a rule change activate faster. Increasing it makes a rule change activate more slowly.
Nick ODell
CC BY-SA 3.0
2017-07-26T05:09:28.830Z
2017-07-26T05:09:28.830Z
Nick ODell
<p>What do these parameters do and what to insert there</p>

<pre><code>        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 ?
</code></pre>

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

<p>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 ?</p>

<p>I understand it's start end time out time. But how it work's.</p>

<blockchain><altcoin><sha256><altcoin-development><genesis-block>
New params of chainparams.cpp. What put on them and how generate?
tseries
# New params of chainparams.cpp. What put on them and how generate?

(Asked by: username_0 on 2017-07-26)

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.

**Tags:** blockchain, altcoin, sha256, altcoin-development, genesis-block


---

## 1 answers

### Answer by username_1 on 2017-07-26. Score: 3 | Accepted answer

```
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](https://github.com/bitcoin/bitcoin/commit/f9ec3f0fadb11ee9889af977e16915f5d6e01944).

> **Comments:**
> **username_0**: 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  
> **username_1**: @username_0 Neither, it's expressed in terms of blocks.  
> **username_0**: 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.  
> **username_1**: @username_0 Decreasing that value makes a rule change activate faster. Increasing it makes a rule change activate more slowly.  

---

