Changelog

2026-04-05

New chart: Transparent Coins by Depth from Coinbase — stacked area showing how many hops each transparent UTXO is from its original mining reward (coinbase, 1 hop, 2-3 hops, 4+ hops)
Dormant Coins chart now shows created vs surviving — green bars show ZEC created per week, red bars show what's still unspent, making it easy to see which cohorts were spent
Standardized all chart legends — every multi-series chart now uses the same toggleable legend component
Fixed Net Pool Flows Y-axis — now always includes zero, preventing misleading scale shifts
Difficulty change chart — day-over-day difficulty adjustment shown as green/red bars below the hashrate chart. Green = more miners, red = fewer.
Backfill progress on all charts — every chart backed by a background indexing job now shows completion percentage or a green checkmark when done
Changelog page at [/changelog](/changelog) — documents all notable changes to the site
Added 7 new tests covering news event detection, depth snapshot bucketing, and block-to-week conversion

Fixed UTXO cohort double-counting — transparent ZEC by age was showing >21M ZEC (impossible). Root cause: daily indexer was adding UTXOs at the chain tip while snapshots were being taken. Fixed by filtering to `height <= snapshot_height`
Fixed Orchard fee classification — pure z-to-z transactions have a small `valueBalance` from fees, which was being counted as deshielding activity. Added fee threshold (0.001 ZEC) to exclude these
Split NEAR Bridge chart into two stacked single-axis charts (was dual Y-axis)
Added backfill progress indicator to UTXO age chart

News feed launched — statistical event detection using z-scores against 30-day rolling averages. Detects transaction spikes/drops, shielding surges, hashrate changes, and shielding rate milestones
News events link to charts — clicking a news item opens the relevant chart with a highlight line and annotation at the exact date
Orchard anonymity set chart — for any ZEC amount, shows how many Orchard shielding transactions have ever moved at least that much (your anonymity set when deshielding)
Shielding histogram backfill — retroactive shielding/deshielding amount distribution built during UTXO replay
Admin status page at /admin/status
Deploy script for one-command deploys

UTXO set backfill from genesis — replays all ~3.3M blocks to build a complete transparent UTXO index (~28M outputs tracked)
Transparent UTXO age distribution — stacked area showing ZEC by age cohort (<30d, 30-180d, 180d-1y, 1-3y, 3y+)
Mean transparent coin age — weighted average age computed from actual UTXO set snapshots
Renamed "Coin Age" to "Pool Residency Time" for accuracy (measures time in pool, not actual coin age)
Documented action counting asymmetry across pool types (Orchard=1 per transfer, Sapling/transparent=2)

Initial launch — 25+ interactive D3.js charts covering:
All on-chain data sourced from consensus-verified Zebra full node (no third-party APIs for chain data)
Price data from CoinGecko (live) and CryptoCompare (historical)
Interactive time range slider, light/dark theme, toggleable series legends
Catppuccin color scheme