Merge #17002: chainparams: Bump assumed chain params

fa3a733 chainparams: Bump assumed chain params (MarcoFalke)

Pull request description:

  As every year, reviewers get extra point when their node is running:
  * `assumevalid=0`
  * `checkpoints=0`
  * on non-x86_64 hardware

  See https://github.com/bitcoin/bitcoin/blob/master/doc/release-process.md#before-every-major-and-minor-release for the process.

ACKs for top commit:
  laanwj:
    ACK fa3a733
  Sjors:
    ACK fa3a733 for mainnet on macOS 10.14.6.
  jamesob:
    ACK bitcoin/bitcoin@fa3a733
  fanquake:
    ACK fa3a733 - checked the mainnet values. I have notes on reviewing `assumevalid` updates in [core-review](https://github.com/fanquake/core-review/blob/master/update-assumevalid.md).

Tree-SHA512: fc545ba0a7056908040b47076b393d028c1c022967c25a2074752f76f0386ef099a64445da6125117a04418bd7eb0655121bfc94e6f60b7bc2666947491b5228

Author: fanquake

doc/release-process.md

@@ -26,7 +26,7 @@ Release Process
 * Update hardcoded [seeds](/contrib/seeds/README.md), see [this pull request](https://github.com/bitcoin/bitcoin/pull/7415) for an example.
 * Update [`src/chainparams.cpp`](/src/chainparams.cpp) m_assumed_blockchain_size and m_assumed_chain_state_size with the current size plus some overhead (see [this](#how-to-calculate-m_assumed_blockchain_size-and-m_assumed_chain_state_size) for information on how to calculate them).
 * Update `src/chainparams.cpp` chainTxData with statistics about the transaction count and rate. Use the output of the RPC `getchaintxstats`, see
-  [this pull request](https://github.com/bitcoin/bitcoin/pull/12270) for an example. Reviewers can verify the results by running `getchaintxstats <window_block_count> <window_last_block_hash>` with the `window_block_count` and `window_last_block_hash` from your output.
+  [this pull request](https://github.com/bitcoin/bitcoin/pull/17002) for an example. Reviewers can verify the results by running `getchaintxstats <window_block_count> <window_last_block_hash>` with the `window_block_count` and `window_last_block_hash` from your output.
 * On both the master branch and the new release branch:
   - update `CLIENT_VERSION_MINOR` in [`configure.ac`](../configure.ac)
   - update `CLIENT_VERSION_MINOR`, `PACKAGE_VERSION`, and `PACKAGE_STRING` in [`build_msvc/bitcoin_config.h`](/build_msvc/bitcoin_config.h)
@@ -378,7 +378,7 @@ Both variables are used as a guideline for how much space the user needs on thei
 Note that all values should be taken from a **fully synced** node and have an overhead of 5-10% added on top of its base value.
 
 To calculate `m_assumed_blockchain_size`:
-- For `mainnet` -> Take the size of the Bitcoin data directory, excluding `/regtest` and `/testnet3` directories.
+- For `mainnet` -> Take the size of the data directory, excluding `/regtest` and `/testnet3` directories.
 - For `testnet` -> Take the size of the `/testnet3` directory.
 
 

src/chainparams.cpp

@@ -84,10 +84,10 @@ class CMainParams : public CChainParams {
         consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008
 
         // The best chain should have at least this much work.
-        consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000051dc8b82f450202ecb3d471");
+        consensus.nMinimumChainWork = uint256S("0x000000000000000000000000000000000000000008ea3cf107ae0dec57f03fe8");
 
         // By default assume that the signatures in ancestors of this block are valid.
-        consensus.defaultAssumeValid = uint256S("0x0000000000000000000f1c54590ee18d15ec70e68c8cd4cfbadb1b4f11697eee"); //563378
+        consensus.defaultAssumeValid = uint256S("0x00000000000000000005f8920febd3925f8272a6a71237563d78c2edfdd09ddf"); // 597379
 
         /**
          * The message start string is designed to be unlikely to occur in normal data.
@@ -100,8 +100,8 @@ class CMainParams : public CChainParams {
         pchMessageStart[3] = 0xd9;
         nDefaultPort = 8333;
         nPruneAfterHeight = 100000;
-        m_assumed_blockchain_size = 240;
-        m_assumed_chain_state_size = 3;
+        m_assumed_blockchain_size = 280;
+        m_assumed_chain_state_size = 4;
 
         genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);
         consensus.hashGenesisBlock = genesis.GetHash();
@@ -155,10 +155,10 @@ class CMainParams : public CChainParams {
         };
 
         chainTxData = ChainTxData{
-            // Data from rpc: getchaintxstats 4096 0000000000000000000f1c54590ee18d15ec70e68c8cd4cfbadb1b4f11697eee
-            /* nTime    */ 1550374134,
-            /* nTxCount */ 383732546,
-            /* dTxRate  */ 3.685496590998308
+            // Data from RPC: getchaintxstats 4096 00000000000000000005f8920febd3925f8272a6a71237563d78c2edfdd09ddf
+            /* nTime    */ 1569926786,
+            /* nTxCount */ 460596047,
+            /* dTxRate  */ 3.77848885073875,
         };
     }
 };
@@ -191,10 +191,10 @@ class CTestNetParams : public CChainParams {
         consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].nTimeout = 1230767999; // December 31, 2008
 
         // The best chain should have at least this much work.
-        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000007dbe94253893cbd463");
+        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000012b2a3a62424f21c918");
 
         // By default assume that the signatures in ancestors of this block are valid.
-        consensus.defaultAssumeValid = uint256S("0x0000000000000037a8cd3e06cd5edbfe9dd1dbcc5dacab279376ef7cfc2b4c75"); //1354312
+        consensus.defaultAssumeValid = uint256S("0x00000000000000b7ab6ce61eb6d571003fbe5fe892da4c9b740c49a07542462d"); // 1580000
 
         pchMessageStart[0] = 0x0b;
         pchMessageStart[1] = 0x11;
@@ -240,10 +240,10 @@ class CTestNetParams : public CChainParams {
         };
 
         chainTxData = ChainTxData{
-            // Data from rpc: getchaintxstats 4096 0000000000000037a8cd3e06cd5edbfe9dd1dbcc5dacab279376ef7cfc2b4c75
-            /* nTime    */ 1531929919,
-            /* nTxCount */ 19438708,
-            /* dTxRate  */ 0.626
+            // Data from RPC: getchaintxstats 4096 00000000000000b7ab6ce61eb6d571003fbe5fe892da4c9b740c49a07542462d
+            /* nTime    */ 1569741320,
+            /* nTxCount */ 52318009,
+            /* dTxRate  */ 0.1517002392872353,
         };
     }
 };