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fix(challenge): record passage text hash to detect content drift (#43) #72

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fix(challenge): record passage text hash to detect content drift (#43) #72

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3 changes: 2 additions & 1 deletion script.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1124,7 +1124,7 @@ async function shareResult() {
// A link carries a finished run's settings, seed, WPM, and keystroke
// timings in the URL hash. Opening it plays those passages with the run as
// the ghost, without changing the receiver's saved settings.
const CHALLENGE_VERSION = 1;
const CHALLENGE_VERSION = 2;
const CHALLENGE_MAX_LENGTH = 20000; // characters in the hash
const CHALLENGE_MAX_STROKES = 5000;
const CHALLENGE_SETTINGS = [
Expand Down Expand Up @@ -1241,6 +1241,7 @@ function challengePayload() {
v: CHALLENGE_VERSION,
s: settings,
seed: runtime.seed,
th: textHash(firstPassageText ? firstPassageText() : (runtime.passages[0] || "")),
wpm: Number(modalWpmElement.textContent),
k: gameState.category === 'weak' ? runtime.weakKeys : [],
d: deltas,
Expand Down