3.2 Reachability: a dungeon whose exit is unreachable from the entrance is
paid-but-unwinnable. generate() now BFS-checks entrance->exit and regenerates
if unreachable. Retries are deterministic (per-attempt ROT seed = seedInt +
attempt; the seeded rng stream keeps advancing), so verify-regeneration
replays the same attempts and reproduces the exact dungeon — the provably-fair
determinism from Phase 0.2 is preserved. The single-pass body is extracted to
_generateOnce and isReachable does the flood-fill.
3.3 Monster collision: with movesPerPlayerMove > 1 (the casino preset's 1.5x
speed) the monster takes multiple steps per turn, but collision was only
checked after the loop — so it could step onto the player's tile and off again
between checks, phasing through and missing the catch (player-favorable, erodes
the house edge). Collision is now checked after each sub-step.
Adds reachability tests (provablyFair.test.js) and monsterCollision.test.js.
Random block timing remains the untouched core mechanic. Full suite: 20 suites
/ 153 tests.
Phase 0.1 — Underpayment confirmation bug (CRITICAL):
Payment confirmation gated on `status.confirmed`, which checkPaymentStatus
sets for ANY incoming tx regardless of amount, so sending a single atomic
unit granted a full game/credits. Now gate on `status.complete` (received
>= expected). Underpayers are warned once and the payment stays pending so
a top-up can complete it. Persist `received_amount` for single-game and
credits confirmations for reconciliation. Adds an underpayment regression
test.
Phase 0.2 — Provably-fair was decorative (CRITICAL):
The committed seed had zero effect on the dungeon (created seededRNG was
unused; generation used Math.random + a globally-seeded ROT.RNG). Thread a
per-game seeded RNG derived from the committed seed through dungeon
generation (reseed the Digger via seedToInt + replace all Math.random) and
monster movement (seededShuffle). Add DungeonGenerator.regenerateFromSeed
and layoutFingerprint; /api/verify now regenerates the dungeon from the
seed and returns a fingerprint a player can independently reproduce. Adds a
determinism test suite.
Full suite: 11 suites / 113 tests passing.
Plan and progress tracked in docs/REMEDIATION_PLAN.md.
jwinterm