Skip to content

kernel: Chainparams and headerssync updates from Core #34677 #291

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
luke-jr wants to merge 6 commits into
base: 29.x-knots
Choose a base branch
from
Open

kernel: Chainparams and headerssync updates from Core #34677 #291

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
cd629fb
kernel: update assumed blockchain and chainstate sizes
achow101 Feb 25, 2026
3743ded
kernel: update defaultAssumeValid and minimumChainWork
achow101 Feb 25, 2026
7b535ed
kernel: update chainTxData
achow101 Feb 25, 2026
c5836d9
kernel: Update headerssync params
achow101 Feb 25, 2026
318a1a3
kernel: Add recent assumeutxo snapshot info
achow101 Feb 26, 2026
ea4e349
Diff-minimise and rollback non-mainnet chainparams updates
luke-jr Mar 25, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions src/headerssync.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -13,11 +13,11 @@
// contrib/devtools/headerssync-params.py.

//! Store one header commitment per HEADER_COMMITMENT_PERIOD blocks.
constexpr size_t HEADER_COMMITMENT_PERIOD{632};
constexpr size_t HEADER_COMMITMENT_PERIOD{641};

//! Only feed headers to validation once this many headers on top have been
//! received and validated against commitments.
constexpr size_t REDOWNLOAD_BUFFER_SIZE{15009}; // 15009/632 = ~23.7 commitments
constexpr size_t REDOWNLOAD_BUFFER_SIZE{15218}; // 15218/641 = ~23.7 commitments

// Our memory analysis assumes 48 bytes for a CompressedHeader (so we should
// re-calculate parameters if we compress further)
Expand Down
20 changes: 13 additions & 7 deletions src/kernel/chainparams.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -117,8 +117,8 @@ 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 = uint256{"0000000000000000000000000000000000000000dee8e2a309ad8a9820433c68"};
consensus.defaultAssumeValid = uint256{"00000000000000000000611fd22f2df7c8fbd0688745c3a6c3bb5109cc2a12cb"}; // 912683
consensus.nMinimumChainWork = uint256{"0000000000000000000000000000000000000001128750f82f4c366153a3a030"};
consensus.defaultAssumeValid = uint256{"00000000000000000000ccebd6d74d9194d8dcdc1d177c478e094bfad51ba5ac"}; // 938343

/**
* The message start string is designed to be unlikely to occur in normal data.
Expand All @@ -131,7 +131,7 @@ class CMainParams : public CChainParams {
pchMessageStart[3] = 0xd9;
nDefaultPort = 8333;
nPruneAfterHeight = 100000;
m_assumed_blockchain_size = 810;
m_assumed_blockchain_size = 856;
m_assumed_chain_state_size = 14;

genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);
Expand Down Expand Up @@ -229,14 +229,20 @@ class CMainParams : public CChainParams {
.hash_serialized = AssumeutxoHash{uint256{"4daf8a17b4902498c5787966a2b51c613acdab5df5db73f196fa59a4da2f1568"}},
.m_chain_tx_count = 1226586151,
.blockhash = consteval_ctor(uint256{"0000000000000000000108970acb9522ffd516eae17acddcb1bd16469194a821"}),
},
{
.height = 935'000,
.hash_serialized = AssumeutxoHash{uint256{"e4b90ef9eae834f56c4b64d2d50143cee10ad87994c614d7d04125e2a6025050"}},
.m_chain_tx_count = 1305397408,
.blockhash = consteval_ctor(uint256{"0000000000000000000147034958af1652b2b91bba607beacc5e72a56f0fb5ee"}),
}
};

chainTxData = ChainTxData{
// Data from RPC: getchaintxstats 4096 00000000000000000000611fd22f2df7c8fbd0688745c3a6c3bb5109cc2a12cb
.nTime = 1756722903,
.tx_count = 1235299397,
.dTxRate = 6.721086701157182, // held back due to present abnormal tx rate
// Data from RPC: getchaintxstats 4096 00000000000000000000ccebd6d74d9194d8dcdc1d177c478e094bfad51ba5ac
.nTime = 1772055173,
.tx_count = 1315805869,
.dTxRate = 5.40111006496122,
};
}
};
Expand Down
Loading