Merge bitcoin#22499: Update assumed chain params

eeddd1c Update assumed chain params (Sriram)

Pull request description:

  Update the relevant variables in `src/chainparams.cpp` for `mainnet`, `testnet`, and `signet` as given [here](https://github.com/bitcoin/bitcoin/blob/master/doc/release-process.md#before-branch-off).

  To review this PR, check out [this guide](https://github.com/fanquake/core-review/blob/master/update-assumevalid.md).

  Note: added a 10% overhead to the base value of `mainnet` in `m_assumed_blockchain_size`

ACKs for top commit:
  MarcoFalke:
    ACK eeddd1c, checked against my node 🌮
  bfolkens:
    ACK eeddd1c - checked against `mainnet`
  achow101:
    Code Review ACK eeddd1c
  0xB10C:
    ACK mainnet, testnet, and signet eeddd1c
  jamesob:
    ACK eeddd1c ([`jamesob/ackr/22499.1.sriramdvt.update_assumed_chain_par`](https://github.com/jamesob/bitcoin/tree/ackr/22499.1.sriramdvt.update_assumed_chain_par))
  darosior:
    ACK eeddd1c mainnet and testnet

Tree-SHA512: 0ab19d2acc6a854c6aa38fba199d61c68cec40f005d1d54341ea32b59aae9b7d1aabfd21d7c0bc79f54be99d3e71d1d727196cab88f370259fd2c6e002d3e43c

Author: fanquake

src/chainparams.cpp

@@ -91,8 +91,8 @@ 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("0x00000000000000000000000000000000000000001533efd8d716a517fe2c5008");
-        consensus.defaultAssumeValid = uint256S("0x0000000000000000000b9d2ec5a352ecba0592946514a92f14319dc2b367fc72"); // 654683
+        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000001fa4663bbbe19f82de910280");
+        consensus.defaultAssumeValid = uint256S("0x00000000000000000008a89e854d57e5667df88f1cdef6fde2fbca1de5b639ad"); // 691719
 
         /**
          * The message start string is designed to be unlikely to occur in normal data.
@@ -105,7 +105,7 @@ class CMainParams : public CChainParams {
         pchMessageStart[3] = 0xd9;
         nDefaultPort = 8333;
         nPruneAfterHeight = 100000;
-        m_assumed_blockchain_size = 350;
+        m_assumed_blockchain_size = 420;
         m_assumed_chain_state_size = 6;
 
         genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);
@@ -166,10 +166,10 @@ class CMainParams : public CChainParams {
         };
 
         chainTxData = ChainTxData{
-            // Data from RPC: getchaintxstats 4096 0000000000000000000b9d2ec5a352ecba0592946514a92f14319dc2b367fc72
-            /* nTime    */ 1603995752,
-            /* nTxCount */ 582083445,
-            /* dTxRate  */ 3.508976121410527,
+            // Data from RPC: getchaintxstats 4096 00000000000000000008a89e854d57e5667df88f1cdef6fde2fbca1de5b639ad
+            /* nTime    */ 1626697539,
+            /* nTxCount */ 656509474,
+            /* dTxRate  */ 2.424920418708139,
         };
     }
 };
@@ -210,8 +210,8 @@ 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("0x0000000000000000000000000000000000000000000001db6ec4ac88cf2272c6");
-        consensus.defaultAssumeValid = uint256S("0x000000000000006433d1efec504c53ca332b64963c425395515b01977bd7b3b0"); // 1864000
+        consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000005180c3bd8290da33a1a");
+        consensus.defaultAssumeValid = uint256S("0x0000000000004ae2f3896ca8ecd41c460a35bf6184e145d91558cece1c688a76"); // 2010000
 
         pchMessageStart[0] = 0x0b;
         pchMessageStart[1] = 0x11;
@@ -261,10 +261,10 @@ class CTestNetParams : public CChainParams {
         };
 
         chainTxData = ChainTxData{
-            // Data from RPC: getchaintxstats 4096 000000000000006433d1efec504c53ca332b64963c425395515b01977bd7b3b0
-            /* nTime    */ 1603359686,
-            /* nTxCount */ 58090238,
-            /* dTxRate  */ 0.1232886622799463,
+            // Data from RPC: getchaintxstats 4096 0000000000004ae2f3896ca8ecd41c460a35bf6184e145d91558cece1c688a76
+            /* nTime    */ 1625727096,
+            /* nTxCount */ 60408943,
+            /* dTxRate  */ 0.08379062270367649,
         };
     }
 };
@@ -284,15 +284,15 @@ class SigNetParams : public CChainParams {
             vSeeds.emplace_back("2a01:7c8:d005:390::5");
             vSeeds.emplace_back("v7ajjeirttkbnt32wpy3c6w3emwnfr3fkla7hpxcfokr3ysd3kqtzmqd.onion:38333");
 
-            consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000000000000019fd16269a");
-            consensus.defaultAssumeValid = uint256S("0x0000002a1de0f46379358c1fd09906f7ac59adf3712323ed90eb59e4c183c020"); // 9434
+            consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000000000000008546553c03");
+            consensus.defaultAssumeValid = uint256S("0x000000187d4440e5bff91488b700a140441e089a8aaea707414982460edbfe54"); // 47200
             m_assumed_blockchain_size = 1;
             m_assumed_chain_state_size = 0;
             chainTxData = ChainTxData{
-                // Data from RPC: getchaintxstats 4096 0000002a1de0f46379358c1fd09906f7ac59adf3712323ed90eb59e4c183c020
-                /* nTime    */ 1603986000,
-                /* nTxCount */ 9582,
-                /* dTxRate  */ 0.00159272030651341,
+                // Data from RPC: getchaintxstats 4096 000000187d4440e5bff91488b700a140441e089a8aaea707414982460edbfe54
+                /* nTime    */ 1626696658,
+                /* nTxCount */ 387761,
+                /* dTxRate  */ 0.04035946932424404,
             };
         } else {
             const auto signet_challenge = args.GetArgs("-signetchallenge");