Port of BIP-110 UASF code from Knots#2

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v72t wants to merge 81 commits into

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29.3+UASF-BIP110

Commits on Feb 14, 2026

Use TAPROOT_CONTROL_MAX_NODE_COUNT_REDUCED for non-consensus Taproot logic

luke-jr
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v72t
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Policy: Enforce SCRIPT_VERIFY_REDUCED_DATA as a policy rule

luke-jr
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script: Define SCRIPT_VERIFY_REDUCED_DATA verification flag (unused) to reduce data push size limit to 256 bytes (except for P2SH redeemScript push)

luke-jr
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script: Limit Taproot annex to 256 bytes for SCRIPT_VERIFY_REDUCED_DATA (still unused)

luke-jr
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script: Forbid Taproot annex entirely with SCRIPT_VERIFY_REDUCED_DATA (still unused)

luke-jr
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v72t
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script: Forbid OP_IF in Tapscript with SCRIPT_VERIFY_REDUCED_DATA (still unused)

luke-jr
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v72t
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script: Limit Taproot control block to 257 bytes for SCRIPT_VERIFY_REDUCED_DATA (still unused)

luke-jr
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v72t
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consensus: Enforce SCRIPT_VERIFY_REDUCED_DATA if DEPLOYMENT_REDUCED_DATA is active (still never)

luke-jr
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v72t
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Limit datacarriersize config to MAX_OUTPUT_DATA_SIZE (=83 B)

luke-jr
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v72t
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consensus: Add no-op flags to CheckTxInputs function

luke-jr
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consensus: Define CheckTxInputsRules::OutputSizeLimit flag (unused) to cap output scripts at 83 bytes

luke-jr
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v72t
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consensus: When CheckTxInputsRules::OutputSizeLimit is enforced (still never), limit non-OP_RETURN scripts to 34 bytes

luke-jr
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v72t
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QA: rpc_getdescriptoractivity: Use RAW_OP_TRUE for test_no_address

luke-jr
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v72t
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QA: test_framework/wallet: Turn MiniWalletMode.RAW_P2PK into actually p2pkh

luke-jr
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v72t
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RPC/Mempool: Provide tx memory usage in testmempoolaccept

luke-jr
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v72t
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QA: test_framework/mempool_util: Calibrate fill_mempool bulk tx size to expected memory usage

luke-jr
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v72t
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Bugfix: QA: mempool_limit: Use "usage" rather than "bytes"

luke-jr
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v72t
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QA: test_framework: Use multiple OP_RETURNs to pad transactions rather than exceed MAX_OP_RETURN_RELAY

luke-jr
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consensus: Enforce CheckTxInputsRules::OutputSizeLimit when DEPLOYMENT_REDUCED_DATA is active (never yet)

luke-jr
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v72t
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Commits on Mar 4, 2026

consensus: Enforce SCRIPT_VERIFY_DISCOURAGE_{UPGRADABLE_WITNESS_PROGRAM,UPGRADABLE_TAPROOT_VERSION,OP_SUCCESS} on blocks when DEPLOYMENT_REDUCED_DATA is active (never yet)

luke-jr
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v72t
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Define a service bit for BIP148

luke-jr
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v72t
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Add questionmark to end of BIP148 service bit string, and add to bitcoin-cli

luke-jr
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Preferentially peer with nodes enforcing BIP148 to avoid partitioning risk

luke-jr
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v72t
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Append UA string with UASF-ReducedData:0.1/

luke-jr
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v72t
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tests: fix feature_cltv, feature_dersig, mempool_accept, and mempool_accept_wtxid

moneybadger1
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v72t
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tests: fix BIP148 service bit

moneybadger1
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v72t
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test: Adapt functional tests to MAX_OUTPUT_SCRIPT_SIZE=34 consensus limit; add reduced_data deployment name to allow regtest RPC access for testing

3c853b6299
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v72t
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test: adapt 6 tests to NODE_BIP148 service flag; add assert_equal_without_usage helper for testmempoolaccept results

3c853b6299
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Fix p2p_1p1c_network test by using dynamic feerates based on mempool eviction threshold

dathonohm
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v72t
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Fix p2p_addrv2_relay test to handle BIP148 service bit CompactSize encoding

dathonohm
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Fix addpeeraddress RPC to include NODE_BIP148 service flag

dathonohm
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Refactor: Include all reduced_data verify flags in REDUCED_DATA_MANDATORY_VERIFY_FLAGS

luke-jr
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validation: Extend CheckInputScripts to allow overriding script validation flags on a pet-input basis

luke-jr
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validation: Exempt inputs spending UTXOs prior to ReducedDataHeightBegin from reduced_data script validation rules

luke-jr
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Add expiry support to versionbit deployments

dathonohm
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Add max_activation_height for mandatory BIP9 activation

dathonohm
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Add DEPLOYMENT_REDUCED_DATA as temporary BIP9 UASF

dathonohm
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v72t
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Support regtest vbparams for max_activation_height and active_duration

dathonohm
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v72t
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Add mandatory signaling enforcement for max_activation_height

dathonohm
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Rename BIP148 service bit to BIP444

luke-jr
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clientversion: Rename fork to UASF-BIP444

luke-jr
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test: implement functional tests for UASF-ReducedData Spec

3c853b6299
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v72t
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test: Add UTXO height-based REDUCED_DATA enforcement test

dathonohm
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test: Update tests for REDUCED_DATA consensus limits

dathonohm
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test: Replace thresh() with and_v() in descriptor test

dathonohm
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test: Add NODE_BIP444 service flag to peer connection tests

dathonohm
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Change all BIP444 references to UASF-ReducedData

dathonohm
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Add mainnet configuration for REDUCED_DATA deployment

dathonohm
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Remove UASF uacomment for mainline Core

dathonohm
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test: Fix fuzz for miniscript.cpp

Retropex
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v72t
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test: change permission and remove some f-string in logs

Retropex
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test: use the correct flag for ignore_rejects in feature_uasf_reduced_data.py

Retropex
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test: Add retry logic to mempool_limit for i686 race condition

dathonohm
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ci: Disable DEBUG=1 for depends in CentOS job to avoid deadlock

dathonohm
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Fix false unknown deployment warning for Taproot on mainnet

dathonohm
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Add per-deployment BIP9 threshold; restore global to 90%, set reduced_data to 55%

dathonohm
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Support regtest vbparams for per-deployment threshold

dathonohm
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add BIP-110 DNS seeds
v72t
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net: ask DNS seed for x8000009

Retropex
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net: allow up to 2 non-BIP110 outbound peers

dathonohm
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test: add two-node chain split and reorg tests for temporary deployment

dathonohm
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consensus: apply output size limit to generation transactions

dathonohm
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test: add versionbits unit tests for max_activation_height and active_duration

dathonohm
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script: require empty witness for P2A spends

dathonohm
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chainparams: enable BIP-110 deployment on testnet4

dathonohm
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Bugfix: validation: Do not cache the result of CheckInputScripts if flags_per_input is used (and avoid using it when unnecessary)

luke-jr
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test: add unit and functional tests for CheckInputScripts cache-poisoning via activation-boundary reorg

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Add BIP-110 branding and version string for standalone UASF client

dathonohm
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test: fix feature_uacomment for BIP-110 subversion suffix

dathonohm
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test: fix feature_includeconf for BIP-110 subversion suffix

dathonohm
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test: strip trailing ? from service flag names in rpc_net

dathonohm
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test: remove Knots-only ignore_rejects from MiniWallet, use acceptnonstdtxn instead

dathonohm
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test: remove ignore_rejects bypass test (Knots-only RPC feature)

dathonohm
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v72t
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Commits on Mar 5, 2026

test: fix mempool_sigoplimit standardness check for BIP-110 datacarrier limits

dathonohm
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test: fix FormatSubVersion test for BIP-110 subversion suffix

dathonohm
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test: use P2PKH outputs in txvalidationcache to comply with BIP-110 output size limit

dathonohm
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test: use P2PKH outputs in wallet_tests to comply with BIP-110 output size limit

dathonohm
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fix linter
v72t
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depends: libevent: Patch to ignore git describe

luke-jr
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test: mark tapscript/pushmaxlimit as non-standard for BIP-110 reduced push size limit

dathonohm
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correct UASF version
v72t
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