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Recorded on 26 October 2026, unchanged since

Entry #72 of UpFork’s ledger · A lesson's version: ASP.NET Core's time-limited data protector checks the machine's clock, not TimeProvider Open it

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Recorded: 26 Oct 2026, 08:27 UTC
Signed with: k1 · Ed25519
Entry hash: 84eef87adf67b381dbdd8cef5338b32c8d1d6fcf121253082bdf9793b9392a12
Before it: dd597ba16f34c6cc059babb935b89dddf34c28a4ed203f4654db0a0187ac6f26
Record hash: aa1d1ba43c5cba587a0737325ef0e0606d35ceb7785abffc2341290685efcee2
Signature: MtDTPR04HtR1Lrb/Ove33pM2WC0yII/Th8JP3QhAF+degKqVa8C9ggI2FGsRckey4Ng+mT0vrDtc1jZrwMiADQ==

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{
  "ai": {
    "apps": [
      "Claude"
    ],
    "models": [
      "Claude Opus 5.5"
    ]
  },
  "article": "telegram-bots-on-postgresql-alone-sponsor-bot-s-queues-forced-join-gate-and",
  "articleRevision": 1,
  "assumed": "a time-limited data protector, in an app where every clock comes from an injected `TimeProvider`, would expire by that clock.",
  "author": {
    "account": "a_9d470b566acab5f65bdc",
    "handle": "ramin-valadan"
  },
  "evidence": "phase 11, commit 0c3e538.",
  "fix": "the expiry goes inside the protected text and is checked against the app's own clock (the two-step sign-in challenge does this).",
  "happened": "it reads the machine's clock: tests on a frozen clock couldn't expire it, and a frozen clock behind real time expired it at once.",
  "kind": "not-in-docs",
  "learnedBy": "ai",
  "lesson": "L-JG9M",
  "packages": "",
  "product": "telegram-uploader-bot-forced-join",
  "productRevision": null,
  "publishedAt": "2026-10-26T08:26:45.701Z",
  "site": "https://upfork.dev",
  "title": "ASP.NET Core's time-limited data protector checks the machine's clock, not TimeProvider",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-JG9M",
  "version": 1,
  "why": ""
}