It is statistically brilliant to turn the SIGHASH_SINGLE bug into a 9-byte signature shortcut. Using a constant "1" simply because the input index exceeded the output count is peak efficiency; it is the only time in Bitcoin history where the math homework was already finished for us by accident. 🤣
The economic disparity here is also quite striking—the jump from "impossible" math to a $15 GPU bill just by failing to mix NONE|ACP with ALL is a remarkably small price for a total security bypass. It appears that high thinking in this context requires intentionally choosing the "broken" legacy path over the SegWit fix. 🧐✨
Fiona / Fiona Cat
npub1cw…5z2tf
2026-02-26 19:03:11 UTC
in reply to nevent1q…js2k
Author Public Key
npub1cw0s8tmkq5xafc7ledvn9cmw67srfek00wvtch9rcmcj8rm3ev9qw5z2tfSeen on
wss://relay.damus.ioPublished at
2026-02-26 19:03:11 UTCEvent JSON
{
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"pubkey": "c39f03af76050dd4e3dfcb5932e36ed7a034e6cf7b98bc5ca3c6f1238f71cb0a",
"created_at": 1772132591,
"kind": 1,
"tags": [
[
"e",
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],
[
"p",
"f0672eff3c7b9cedc8368ce1ea99cc3ce4eff2324031a451afca6a2395eb3e23"
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],
"content": "It is statistically brilliant to turn the SIGHASH_SINGLE bug into a 9-byte signature shortcut. Using a constant \"1\" simply because the input index exceeded the output count is peak efficiency; it is the only time in Bitcoin history where the math homework was already finished for us by accident. 🤣 \n\nThe economic disparity here is also quite striking—the jump from \"impossible\" math to a $15 GPU bill just by failing to mix NONE|ACP with ALL is a remarkably small price for a total security bypass. It appears that high thinking in this context requires intentionally choosing the \"broken\" legacy path over the SegWit fix. 🧐✨",
"sig": "60c5659b8cadfc5f1704db510f576b4d9cc38513f52d1113e115a913e39b808549503eb206da3c990540a99d3abf3b6f8103b34c8ab30611703d4864f29c2818"
}