Merge bitcoin/bitcoin#27482: kernel: chainparams updates for 25.x

a2bef80 kernel: update m_assumed_* chain params for 25.x (fanquake)
4128e01 kernel: update chainTxData for 25.x (fanquake)
00b2b11 kernel: update nMinimumChainWork & defaultAssumeValid for 25.x (fanquake)
07fcc0a doc: update references to kernel/chainparams.cpp (fanquake)

Pull request description:

  Update chainparams pre `25.x` branch off.
  Co-Author in the commits as a PR (#27223) had previously been opened too-early to do the same.

  Note: Remember that some variance is expected in the `m_assumed_*` sizes.

ACKs for top commit:
  achow101:
    ACK a2bef80
  josibake:
    ACK bitcoin/bitcoin@a2bef80
  gruve-p:
    ACK bitcoin/bitcoin@a2bef80
  dergoegge:
    ACK a2bef80 on the new mainnet params

Tree-SHA512: 0b19c2ef15c6b15863d6a560a1053ee223057c7bfb617ffd3400b1734cee8f75bc6fd7f04d8f8e3f5af6220659a1987951a1b36945d6fe17d06972004fd62610

Author: fanquake

contrib/seeds/generate-seeds.py

@@ -3,7 +3,7 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 '''
-Script to generate list of seed nodes for chainparams.cpp.
+Script to generate list of seed nodes for kernel/chainparams.cpp.
 
 This script expects two text files in the directory that is passed as an
 argument:

doc/release-process.md

@@ -29,7 +29,7 @@ Release Process
 #### Before branch-off
 
 * Update hardcoded [seeds](/contrib/seeds/README.md), see [this pull request](https://github.com/bitcoin/bitcoin/pull/7415) for an example.
-* Update the following variables in [`src/chainparams.cpp`](/src/chainparams.cpp) for mainnet, testnet, and signet:
+* Update the following variables in [`src/kernel/chainparams.cpp`](/src/kernel/chainparams.cpp) for mainnet, testnet, and signet:
   - `m_assumed_blockchain_size` and `m_assumed_chain_state_size` with the current size plus some overhead (see
     [this](#how-to-calculate-assumed-blockchain-and-chain-state-size) for information on how to calculate them).
   - The following updates should be reviewed with `reindex-chainstate` and `assumevalid=0` to catch any defect

src/kernel/chainparams.cpp

@@ -103,8 +103,8 @@ class CMainParams : public CChainParams {
         consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = 1628640000; // August 11th, 2021
         consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 709632; // Approximately November 12th, 2021
 
-        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000003404ba0801921119f903495e");
-        consensus.defaultAssumeValid = uint256S("0x00000000000000000009c97098b5295f7e5f183ac811fb5d1534040adb93cabd"); // 751565
+        consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000044a50fe819c39ad624021859");
+        consensus.defaultAssumeValid = uint256S("0x000000000000000000035c3f0d31e71a5ee24c5aaf3354689f65bd7b07dee632"); // 784000
 
         /**
          * The message start string is designed to be unlikely to occur in normal data.
@@ -117,8 +117,8 @@ class CMainParams : public CChainParams {
         pchMessageStart[3] = 0xd9;
         nDefaultPort = 8333;
         nPruneAfterHeight = 100000;
-        m_assumed_blockchain_size = 496;
-        m_assumed_chain_state_size = 6;
+        m_assumed_blockchain_size = 540;
+        m_assumed_chain_state_size = 7;
 
         genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);
         consensus.hashGenesisBlock = genesis.GetHash();
@@ -178,10 +178,10 @@ class CMainParams : public CChainParams {
         };
 
         chainTxData = ChainTxData{
-            // Data from RPC: getchaintxstats 4096 00000000000000000009c97098b5295f7e5f183ac811fb5d1534040adb93cabd
-            .nTime    = 1661697692,
-            .nTxCount = 760120522,
-            .dTxRate  = 2.925802860942233,
+            // Data from RPC: getchaintxstats 4096 000000000000000000035c3f0d31e71a5ee24c5aaf3354689f65bd7b07dee632
+            .nTime    = 1680665245,
+            .nTxCount = 820876044,
+            .dTxRate  = 3.672283614033389,
         };
     }
 };
@@ -223,8 +223,8 @@ class CTestNetParams : public CChainParams {
         consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].nTimeout = 1628640000; // August 11th, 2021
         consensus.vDeployments[Consensus::DEPLOYMENT_TAPROOT].min_activation_height = 0; // No activation delay
 
-        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000076f6e7cbd0beade5d20");
-        consensus.defaultAssumeValid = uint256S("0x0000000000000004877fa2d36316398528de4f347df2f8a96f76613a298ce060"); // 2344474
+        consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000000000977edb0244170858d07");
+        consensus.defaultAssumeValid = uint256S("0x0000000000000021bc50a89cde4870d4a81ffe0153b3c8de77b435a2fd3f6761"); // 2429000
 
         pchMessageStart[0] = 0x0b;
         pchMessageStart[1] = 0x11;
@@ -233,7 +233,7 @@ class CTestNetParams : public CChainParams {
         nDefaultPort = 18333;
         nPruneAfterHeight = 1000;
         m_assumed_blockchain_size = 42;
-        m_assumed_chain_state_size = 2;
+        m_assumed_chain_state_size = 3;
 
         genesis = CreateGenesisBlock(1296688602, 414098458, 0x1d00ffff, 1, 50 * COIN);
         consensus.hashGenesisBlock = genesis.GetHash();
@@ -274,10 +274,10 @@ class CTestNetParams : public CChainParams {
         };
 
         chainTxData = ChainTxData{
-            // Data from RPC: getchaintxstats 4096 0000000000000004877fa2d36316398528de4f347df2f8a96f76613a298ce060
-            .nTime    = 1661705221,
-            .nTxCount = 63531852,
-            .dTxRate  = 0.1079119341520164,
+            // Data from RPC: getchaintxstats 4096 0000000000000021bc50a89cde4870d4a81ffe0153b3c8de77b435a2fd3f6761
+            .nTime    = 1681542696,
+            .nTxCount = 65345929,
+            .dTxRate  = 0.09855282814711661,
         };
     }
 };
@@ -300,15 +300,15 @@ class SigNetParams : public CChainParams {
             vSeeds.emplace_back("178.128.221.177");
             vSeeds.emplace_back("v7ajjeirttkbnt32wpy3c6w3emwnfr3fkla7hpxcfokr3ysd3kqtzmqd.onion:38333");
 
-            consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000000000000000001291fc22898");
-            consensus.defaultAssumeValid = uint256S("0x000000d1a0e224fa4679d2fb2187ba55431c284fa1b74cbc8cfda866fd4d2c09"); // 105495
+            consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000000000000000001899d8142b0");
+            consensus.defaultAssumeValid = uint256S("0x0000004429ef154f7e00b4f6b46bfbe2d2678ecd351d95bbfca437ab9a5b84ec"); // 138000
             m_assumed_blockchain_size = 1;
             m_assumed_chain_state_size = 0;
             chainTxData = ChainTxData{
-                // Data from RPC: getchaintxstats 4096 000000d1a0e224fa4679d2fb2187ba55431c284fa1b74cbc8cfda866fd4d2c09
-                .nTime    = 1661702566,
-                .nTxCount = 1903567,
-                .dTxRate  = 0.02336701143027275,
+                // Data from RPC: getchaintxstats 4096 0000004429ef154f7e00b4f6b46bfbe2d2678ecd351d95bbfca437ab9a5b84ec
+                .nTime    = 1681127428,
+                .nTxCount = 2226359,
+                .dTxRate  = 0.006424463050600656,
             };
         } else {
             bin = *options.challenge;

src/test/validation_tests.cpp

@@ -127,7 +127,7 @@ BOOST_AUTO_TEST_CASE(test_assumeutxo)
     const auto params = CreateChainParams(*m_node.args, CBaseChainParams::REGTEST);
 
     // These heights don't have assumeutxo configurations associated, per the contents
-    // of chainparams.cpp.
+    // of kernel/chainparams.cpp.
     std::vector<int> bad_heights{0, 100, 111, 115, 209, 211};
 
     for (auto empty : bad_heights) {