31.x: Implement BIP 54 (Consensus Cleanup) without mainnet activation - #9

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darosior wants to merge 26 commits into

31.xfrom

Commits on Jul 2, 2026

qa: regenerate hardcoded regtest chain for kernel lib unit tests
darosior
committed
0963454
chainparams: encapsulate deployment configuration logic
darosior
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8f3b630
chainparams: make deployment configuration available on all test networks
darosior
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7f3e966
chainparams: add overloads for RegTest and SigNet with no options
darosior
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e4ee451
qa: use NORMAL_GBT_REQUEST_PARAMS consistently
darosior
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8129ea5
======= Consensus Cleanup BEGINS HERE =======
darosior
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cd7447c
chainparams: add versionbits deployment for BIP 54
darosior
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92167d3
scripted-diff: rename MAX_TX_LEGACY_SIGOPS to MAX_TX_BIP54_SIGOPS
darosior
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4da25b8
moveonly: move CheckSigopsBIP54 from policy to consensus
darosior
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8845b7c

Commits on Jul 6, 2026

validation: make BIP54 sigops check consensus-critical
darosior
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a45789e
qa: add to utilities a version of SignSignature for Taproot inputs
darosior
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f3d520c
qa: extensive unit tests for BIP54 legacy sigops limit
darosior
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4890710
fuzz: add a fuzz target for the BIP54 sigops check
darosior
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6d7b527
scripted-diff: rename testnet4 timewarp constant
darosior
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eaab858
miner: update a timewarp comment to refer specifically to BIP 54
darosior
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9026122
validation: prevent timewarp attacks with a 2h grace period
darosior
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d105532
validation: prevent negative difficulty adjustment intervals
darosior
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f17c1b3
qa: BIP54 test vectors for timewarp and Murch-Zawy
darosior
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9e34296
validation: enforce that coinbase transactions are timelocked to block height
darosior
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0db37aa
qa: BIP54 test vectors for restrictions on coinbase transactions
darosior
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a9a631a
Avoid creating <= 64-byte transactions in most functional tests.

TheBlueMatt
authored and
darosior
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fdb18f9
[test] Separate 64B and 63B tx size tests

ajtowns
authored and
darosior
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dd76ab8
validation: make 64 bytes transactions invalid
darosior
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fe2c4de
qa: unit tests for BIP54 rule on 64-byte transactions (with JSON test vectors)
darosior
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eb6e3c6
scripted-diff: qa: rename constant for BIP54 sigops limit

darosior
and
ajtowns
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9c4e0a2
qa: end-to-end test all BIP54 mitigations
darosior
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f916e95