ReducedData Temporary Softfork (BIP-110/RDTS)#2

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dathonohm wants to merge 29 commits into

v31from

bip110-core-pr2

Commits on Jul 1, 2026

versionbits: add expiry support to versionbit deployments
dathonohm
committed
versionbits: add max_activation_height for mandatory BIP9 activation
dathonohm
committed
chainparams: support regtest vbparams for max_activation_height and active_duration
dathonohm
committed
test: add versionbits unit tests for max_activation_height and active_duration
dathonohm
committed
chainparams: support regtest vbparams for per-deployment threshold
dathonohm
committed
versionbits: add mandatory signaling enforcement for max_activation_height and set vbrequired during mandatory signaling
dathonohm
committed
test: add functional tests for modified BIP9 deployment features
dathonohm
committed
script: use TAPROOT_CONTROL_MAX_NODE_COUNT_REDUCED for non-consensus Taproot logic; adapt tests

luke-jr
and
dathonohm
committed
policy: enforce SCRIPT_VERIFY_REDUCED_DATA as a policy rule

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

committed
script: forbid Taproot annex with SCRIPT_VERIFY_REDUCED_DATA

luke-jr
authored and
dathonohm
committed
script: Forbid OP_IF in Tapscript with SCRIPT_VERIFY_REDUCED_DATA (still unused)

committed
script: Limit Taproot control block to 257 bytes for SCRIPT_VERIFY_REDUCED_DATA (still unused)

luke-jr
authored and
dathonohm
committed
script: require empty witness for P2A spends
dathonohm
committed
consensus: Add no-op flags to CheckTxInputs function

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

luke-jr
authored and
dathonohm
committed
consensus: When CheckTxInputsRules::OutputSizeLimit is enforced (still never), limit non-OP_RETURN scripts to 34 bytes and OP_RETURN outputs to 83 bytes

luke-jr
and
dathonohm
committed

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ReducedData Temporary Softfork (BIP-110/RDTS)#2

ReducedData Temporary Softfork (BIP-110/RDTS)#2
dathonohm wants to merge 29 commits into
v31from
bip110-core-pr2

Commits on Jul 1, 2026

versionbits: add expiry support to versionbit deployments

versionbits: add max_activation_height for mandatory BIP9 activation

chainparams: support regtest vbparams for max_activation_height and active_duration

test: add versionbits unit tests for max_activation_height and active_duration

chainparams: support regtest vbparams for per-deployment threshold

versionbits: add mandatory signaling enforcement for max_activation_height and set vbrequired during mandatory signaling

test: add functional tests for modified BIP9 deployment features

script: use TAPROOT_CONTROL_MAX_NODE_COUNT_REDUCED for non-consensus Taproot logic; adapt tests

policy: enforce SCRIPT_VERIFY_REDUCED_DATA as a policy rule

script: Define SCRIPT_VERIFY_REDUCED_DATA verification flag (unused) to reduce data push size limit to 256 bytes (except for P2SH redeemScript push); adapt tests

script: forbid Taproot annex with SCRIPT_VERIFY_REDUCED_DATA

script: Forbid OP_IF in Tapscript with SCRIPT_VERIFY_REDUCED_DATA (still unused)

script: Limit Taproot control block to 257 bytes for SCRIPT_VERIFY_REDUCED_DATA (still unused)

script: require empty witness for P2A spends

consensus: Add no-op flags to CheckTxInputs function

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

consensus: When CheckTxInputsRules::OutputSizeLimit is enforced (still never), limit non-OP_RETURN scripts to 34 bytes and OP_RETURN outputs to 83 bytes

Commits on Jul 2, 2026

chainparams: add DEPLOYMENT_REDUCED_DATA temporary BIP9 deployment

consensus: Enforce SCRIPT_VERIFY_REDUCED_DATA if DEPLOYMENT_REDUCED_DATA is active

consensus: Enforce CheckTxInputsRules::OutputSizeLimit when DEPLOYMENT_REDUCED_DATA is active; adapt tests

consensus: apply output size limit to generation transactions

consensus: Enforce SCRIPT_VERIFY_DISCOURAGE_{UPGRADABLE_WITNESS_PROGRAM,UPGRADABLE_TAPROOT_VERSION,OP_SUCCESS} on blocks when DEPLOYMENT_REDUCED_DATA is active

Refactor: Include all reduced_data verify flags in REDUCED_DATA_MANDATORY_VERIFY_FLAGS

validation: Extend CheckInputScripts to allow overriding script validation flags on a per-input basis

validation: Exempt inputs spending UTXOs prior to reduced_data_start_height from reduced_data script validation rules

test: implement functional tests for ReducedData Spec

test: Add UTXO height-based REDUCED_DATA enforcement test

test: add functional tests for modified BIP9 temporary deployment

doc: add BIP-110 to bips.md