Depeg Tracker and DEWS Changelog: v5 archive

Impact notes

• The `yield` sub-signal can now score populated `sourceRisk.rewardShare`, `sourceRisk.sourceDepthRatio`, `sourceRisk.sourceAgeSeconds`, `sourceRisk.sourceSwitchCount30d`, `sourceRisk.sourceRiskPenalty`, high reviewed `venueRiskTier`, and rank-attribution source-risk/source-switch drivers
• Structured yield evidence is additive with existing `yield_data.warning_signals` and still caps the Yield Anomaly sub-signal at 100
• Neutral structured rows do not become available zero-stress signals, so missing or neutral evidence does not dilute the DEWS weighted average
• The DEWS source-state loader reads structured evidence from the published `yield-rankings` cache and preserves legacy warning-only behavior when that cache is missing or malformed

Impact notes

• Composite labels such as `coingecko+geckoterminal` are expanded before source-family checks, so they no longer behave like unknown standalone sources
• CoinGecko variants, DefiLlama list/detail/contract variants, and CoinMarketCap-style list aggregators remain correlated families for confirmation and severe-downside corroboration
• Fallback/search lanes remain non-authoritative, while hard market, oracle, protocol, and promoted DEX protocol lanes keep explicit registry-backed families

Impact notes

• CoinGecko/DefiLlama off-chain confirmation is selected from the primary agreeSources family set, so same-family circular evidence cannot promote large-cap pending rows on its own
• Aggregate DEX confirmation requires at least two fresh protocol groups, and pool challengers count distinct protocol/source-family groups while preserving the documented >= $5M single-pool exception
• Promoted pending rows use refreshed peg references, canonical confirmation_sources keys, and the worst trustworthy confirmer price when setting peak severity
• Backfill dry-runs and mutating runs now agree when a trusted replay finds zero events: stale source='backfill' rows are previewed and then deleted
• Historical replay applies the live supply floor from historical supply or current stablecoins-cache supply; when both are absent, existing backfill rows are preserved

Impact notes

• WARS (ARS) live and pending depeg checks can use fresh native CoinGecko quotes before trusting USD/FX-derived divergence on its own
• KGST (KGS) depeg checks use the secondary daily FX mirror and hardcoded validation bounds rather than an unsupported CoinGecko KGS quote
• Historical replay behavior is unchanged except that assets with native ARS market history can prefer that direct native series when available

Impact notes

• A tracked stablecoin entering DANGER/WARNING now raises other same-peg-type coins by up to 15% under current constants (1.15x / 1.08x); the amplifier is defensively capped at 20%
• First-pass coins that themselves are DANGER/WARNING do not contagion-amplify themselves
• Amplifier is clamped, explainable (no learned weights), and surfaced on /api/stress-signals as amplifiers.contagion

Impact notes

• Single-pool manipulation can no longer unilaterally promote a pending depeg (bar = 2 pools OR one pool with >= $5M TVL)
• A worker interruption during backfill no longer leaves a coin with zero depeg rows
• A CoinGecko/DefiLlama outage no longer hammers the endpoint for 45 min per pending row
• Promoted events carry confirmation_sources (e.g. 'DEX+CEX') and pending_reason (e.g. 'large-cap+low-confidence') for ex-post diagnostics
• DEWS liquidity sub-signal fails closed when both 7-day anchors are missing instead of silently contributing 0

Impact notes

• The shared supported blacklist symbol set now includes the direct EVM coverage wave
• DEWS remains coupled to that shared live tracker set instead of maintaining a separate symbol list
• Non-USD amount valuation remains owned by the blacklist tracker; DEWS uses event counts only

Impact notes

• The shared supported blacklist symbol set now includes USDG, RLUSD, U, USDTB, and A7A5
• DEWS continues to derive blacklist-signal eligibility from that shared set instead of maintaining a separate list
• A7A5's blacklist signal can participate as event-count stress only; non-USD amount valuation remains owned by the blacklist tracker ledger

Impact notes

• The aggregate `/api/stress-signals` response preserves `updatedAt` as the newest row used for freshness headers while adding `oldestComputedAt` as a body-only lag diagnostic
• The DEWS cron now retires current `stress_signals` rows for PSI-eligible assets that are explicitly present in the stablecoins cache with zero current supply, without deleting daily history
• Last-valid cached rows still remain available for coins that have positive current supply but insufficient signal coverage in an individual cycle

Impact notes

• Pending rows are now refreshed while they wait for confirmation, preserving first-seen timestamps but updating last-seen and worst-seen state for the active direction
• Pending confirmation now treats opposite-side secondary evidence as contradiction instead of support, and native-quote recovery no longer persists contradictory `recovery_price` values
• DEWS divergence now ignores fresh-but-thin DEX rows unless they pass the same `$1M` live depeg trust gate, while the repair path refreshes current rows and prunes unrecomputable daily history from the Mar 9, 2026 trust-floor boundary onward

Impact notes

• Historical native-fiat replay now uses daily points plus a two-point confirmation window across 36 hours before opening normal non-USD fiat backfill events
• Extreme single-point native crashes of 5,000 bps or more are still preserved even when the native historical confirmation rule would otherwise suppress them
• Broad non-USD backfill repairs can now use authenticated CoinGecko market-chart transport consistently through the admin/backfill path, reducing false rebuild drift during large historical cleanups

Impact notes

• PegScore now uses a curated launch date as the age anchor when one is available, falling back to earliest supply-history coverage only when no launch date is curated
• Older tracked assets with late `supply_history` coverage no longer appear artificially young in the peg-score window
• BRZ now anchors peg-score tracking to its July 19, 2019 launch date instead of a March 2025 supply-history coverage artifact

Impact notes

• Fresh direct native-peg quotes can now veto, sustain, or resolve live depeg state for supported EUR/CHF/GBP/JPY/SGD/AUD/CAD/BRL/IDR/TRY/ZAR/PHP/MXN/RUB/CNH-style fiat pegs instead of remaining effectively BRL-only
• Pending confirmation prefers that same direct native quote first whenever CoinGecko exposes the matching fiat pair, reducing false confirmations from USD/FX reference drift
• Historical backfill now replays supported non-USD fiat assets against direct native fiat price history and a native `1.0` peg when that series exists, which removes large classes of synthetic backfill events caused by USD/FX mismatch

Impact notes

• BRZ-style depegs can now be vetoed or resolved by a fresh direct BRL quote when the USD/FX-derived signal is back inside threshold or points the other way
• Pending confirmation prefers the fresh direct native-peg quote over a weaker derived USD cross-check when CoinGecko exposes that native pair
• Prevents thin BRL reference mismatches from opening, sustaining, or confirming false depeg rows while still preserving genuine native-peg stress

Impact notes

• Thin fiat peg groups with fewer than 3 live contributors now require cached FX fallback before they can open, update, or resolve live depeg state
• Fresh non-cached multi-source primary agreement can now close an already-open live event after recovery even if that source mix is still too soft to open new events directly
• Prevents BRL-style peer-median false positives from both opening new live rows and lingering as active depegs after the peg reference normalizes

Impact notes

• Coins with >= 7 days of mint/burn history now keep the flow signal available even when the latest 24-hour bucket is quiet
• A zero-flow day now contributes zero flow stress instead of silently redistributing the flow weight away from the score
• DEWS cron assembly now reflects the documented mint/burn-baseline semantics for mature tracked coins

Impact notes

• DEX-assisted live recovery now requires at least two corroborating protocol-level DEX groups inside threshold, not just one trusted aggregate row
• Large challenger pools can veto ambiguous-primary DEX recoveries when they still show the old depeg direction
• New-event suppression and other aggregate-DEX-driven state mutations now share that stricter corroboration policy, reducing synthetic split events on chronically depegged coins

Impact notes

• Same-direction DEX disagreement is now advisory for ongoing events instead of forcing a synthetic recovery boundary
• Open depeg rows remain continuous until the standard recovery path confirms a sub-threshold resolution
• Prevents repeated event fragmentation on chronically depegged assets when aggregate DEX pricing briefly snaps back toward peg

Impact notes

• Blacklist signal coverage is now derived from the shared supported blacklist symbol set, so PYUSD and USD1 receive the same DEWS blacklist input treatment as USDC, USDT, PAXG, and XAUT
• Thin non-USD DEWS divergence inputs now use cached `fxFallbackRates` from the stablecoins payload instead of relying only on sparse peer medians
• DEWS input semantics now match the documented blacklist coverage and the live depeg / peg-summary FX-reference path