Measured, then fixed, the three things that made a crowd impossible.
Ledger: Post issued three round trips per posting, so settlement scaled
in network latency rather than work. It is now two statements regardless
of leg count — settling 1000 winners went 844ms to 220ms. The lock and
the balance read must stay separate statements: a single statement, even
one whose CTE does FOR UPDATE, evaluates against a snapshot taken before
the locks are held, so concurrent transactions read stale balances and
money disappears. The conservation tests caught exactly that.
Broadcast: every connection marshalled its own copy, ~355us each. At any
real crowd that exceeds the tick interval by orders of magnitude. Frames
are now serialised once per broadcast and shared.
Feed: the player list is capped at 24 and carries no public keys, and
running rounds broadcast at 5Hz instead of 60Hz. Clients compute the
multiplier locally from the round start time, which the deterministic
curve makes exact. Frame size fell from 3.6KB to 1.8KB.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Three WebGL scenes on one renderer and one context, since a phone should
not allocate a context per game: a rocket straining against gravity, a
decaying orbit, and a tower that sways harder the higher it stacks. The
loop stops when the tab is hidden.
Navigation moves to the bottom, where a thumb already is. New Stats view
with balance history, cash-out rate, and a distribution chart that plots
observed crash points against what the published maths predicts — the
honest version of a hot-numbers board.
Charts are hand-built SVG, ~300 lines, rather than a library that would
cost more to load than the 3D engine.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Auto cash-out closes a position at exactly the chosen target rather than
the next tick's multiplier, and fires whenever the target is at or below
the crash point. This is the feature that makes the game playable over a
network, where manual timing is at the mercy of latency.
House edge drops from 2% to 1% across crash and scratch. Scratch prize
tables retuned so the published 99% RTP is exact.
Adds docs/API.md: the client uses no private endpoints, so anyone can
write a bot against the same API.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Round length is now bounded: the multiplier follows a hyperbolic curve
diverging at 60s, replacing an exponential one where a 275x crash point
produced a two-and-a-half minute round.
Fixes seed reveal, which silently failed every round because pgx cannot
encode a fixed-size byte array as bytea.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
