Bitcoin PoW Core v26.1.0 Release

v26.1.0 Release Notes (BTCW/BTC)

Merged the BitcoinPoW/PoT code into BTC 26.1

Notable changes

BTCW updates:

• To mine BTCW, use the rpc command 'generate'
• Miner is single threaded, only one wallet can be loaded when mining.
• Stop mining by clicking the lightning icon and select stop mining.
• getmininginfo rpc command returns cpu loading / local hashrate / days to find block.
• Hover over lightning icon to get mining stats.
• tx / txzap / rescan rpc commands have been added.
• The binaries built use the same naming convention as Bitcoin. bitcoin-qt is the binary. Rename manually if you wish.

Wallet

• bitcoin#28994 wallet: skip BnB when SFFO is enabled
• bitcoin#28920 wallet: birth time update during tx scanning
• bitcoin#29176 wallet: Fix use-after-free in WalletBatch::EraseRecords
• bitcoin#29510 wallet: getrawchangeaddress and getnewaddress failures should not affect keypools for descriptor wallets

RPC

• bitcoin#29003 rpc: fix getrawtransaction segfault
• bitcoin#28784 rpc: keep .cookie file if it was not generated

Logs

• bitcoin#29227 log mempool loading progress

P2P and network changes

• bitcoin#29200 net: create I2P sessions using both ECIES-X25519 and ElGamal encryption
• bitcoin#29412 p2p: Don't process mutated blocks
• bitcoin#29524 p2p: Don't consider blocks mutated if they don't connect to known prev block

Build

• bitcoin#29127 Use hardened runtime on macOS release builds.
• bitcoin#29195 build: Fix -Xclang -internal-isystem option

CI

• bitcoin#28992 ci: Use Ubuntu 24.04 Noble for asan,tsan,tidy,fuzz
• bitcoin#29080 ci: Set HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK to avoid unrelated failures

Miscellaneous

• bitcoin#28391 refactor: Simplify CTxMempool/BlockAssembler fields, remove some external mapTx access
• bitcoin#29179 test: wallet rescan with reorged parent + IsFromMe child in mempool
• bitcoin#28791 snapshots: don't core dump when running -checkblockindex after loadtxoutset
• bitcoin#29357 test: Drop x modifier in fsbridge::fopen call for MinGW builds
• bitcoin#29529 fuzz: restrict fopencookie usage to Linux & FreeBSD

Credits

Thanks to everyone who directly contributed to this release:

• Fluffy Function
• dergoegge
• fanquake
• furszy
• glozow
• Greg Sanders
• Hennadii Stepanov
• MarcoFalke
• Martin Zumsande
• Murch
• Roman Zeyde
• stickies-v
• UdjinM6