dgb: runtime min-protocol-version 95%-ratchet (1400->3500) conforming to oracle [step-2] - #602
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… to oracle Step-2 of the proto-floor conformance (step-1 #599 landed the cold floor 1400 + ratchet TARGET const 3500). Adds the pure SSOT free function dgb::ratchet_min_protocol_version (coin/desired_version_tally.hpp) mirroring p2pool-dgb-scrypt update_min_protocol_version (data.py:857-863): best-VERSION work-weight >= floor(total_weight * 95 / 100) => lift MINIMUM_PROTOCOL_VERSION 1400 -> 3500. Reads the same work-weighted desired-version map (get_desired_version_weights) over the same window [CHAIN_LENGTH*9//10, CHAIN_LENGTH//10] as the 60% switch gate (share_check step 2); this is its runtime sibling, lifting the inbound P2P handshake floor instead of rejecting a share. Integer math floor-divides exactly like the oracle (NOT cross-multiply -- the two differ at the boundary). KAT dgb_min_protocol_ratchet_test (9 cases, all hand-derived): guard, unanimous, exactly-95%, just-below, floor-div boundary (sum=101/best=95: ratchets under floor-div, would not under cross-mult), best-absent, empty-window oracle dict branch, work-weighted-not-flat-count, and consensus-magnitude (2^256-scale, no overflow). Registered in test CMakeLists + build.yml allowlist. Pure/additive: no production call-site rewired this slice (runtime wiring into the per-best-share loop is the follow-on, mirroring step-1 ship-core-then-wire). Consensus-bearing accept-floor value -> surface for operator merge-tap.
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dgb: wire runtime min-protocol 95%-ratchet into per-best-share loop (#602 follow-on)
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Step-2 of the DGB proto-floor conformance (step-1 = #599, cold floor 1400 + ratchet TARGET const 3500).
What
Pure SSOT free function
dgb::ratchet_min_protocol_version(coin/desired_version_tally.hpp) mirroring oracle frstrtr/p2pool-dgb-scryptupdate_min_protocol_version(data.py:857-863):Consumes the same work-weighted desired-version map (
get_desired_version_weights) over the same window[CHAIN_LENGTH*9//10, CHAIN_LENGTH//10]as the 60% version-switch gate (share_check step 2) — this is its runtime sibling, lifting the inbound P2P handshake floor instead of rejecting a share. Oracle call-site: data.py:562 / main.py:216.Integer math floor-divides exactly like the oracle (
sum*95//100), NOT cross-multiply — the two differ at the boundary; the KAT pins this.Test
dgb_min_protocol_ratchet_test— 9 hand-derived KATs, all green locally on .198: guard / unanimous / exactly-95% / just-below / floor-div boundary (sum=101,best=95 ratchets under floor-div, would NOT under cross-mult) / best-absent / empty-window oracle dict-branch / work-weighted-not-flat-count / consensus-magnitude (2^256-scale, no overflow). Registered in test CMakeLists + build.yml allowlist (no #143 NOT_BUILT trap).Scope
Pure/additive, fenced to src/impl/dgb/ + build.yml. No production call-site rewired this slice (runtime wiring into the per-best-share loop is the follow-on, mirroring step-1 ship-core-then-wire). Consensus-bearing accept-floor value — does NOT auto-merge; surface for operator merge-tap once full CI rollup green.