Making a distinction between the 3 main CJ implementations might clear this up a bit.
The CJ txns in question are samourai/ashigaru tx0 transactions, not JM or wasabi txns. The latter two don't depend on op_return.
For the first two, the initial transaction, known as tx0, uses op_return in a size that AFAIK exceeds said filtering attempt. Tx0 gets UTXO's into uniform pre-determined sizes, and initiates coordination with other collaborators.
%20-%20Profi.png/:/cr=t:7.63%25,l:7.63%25,w:84.75%25,h:84.75%25/rs=w:1536,cg:true,m)
Lonelypumpkins
npub1je…ys82z
2026-02-28 15:20:24 UTC
in reply to nevent1q…zlkg
Author Public Key
npub1jextjwgfkzspzk7h0yl6j27a8aqkaumncwajsrmmvsff5gt20q7slys82zSeen on
wss://nostr.winePublished at
2026-02-28 15:20:24 UTCEvent JSON
{
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"pubkey": "964cb93909b0a0115bd7793fa92bdd3f416ef373c3bb280f7b64129a216a783d",
"created_at": 1772292024,
"kind": 1,
"tags": [
[
"alt",
"A short note: Making a distinction between the 3 main CJ impleme..."
],
[
"e",
"70d0f448522e398d100f11c1c5e7eaa3537e2714f42afd9862676c337705a5e0",
"wss://nostr.wine/",
"root",
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],
"content": "Making a distinction between the 3 main CJ implementations might clear this up a bit.\n\nThe CJ txns in question are samourai/ashigaru tx0 transactions, not JM or wasabi txns. The latter two don't depend on op_return.\n\nFor the first two, the initial transaction, known as tx0, uses op_return in a size that AFAIK exceeds said filtering attempt. Tx0 gets UTXO's into uniform pre-determined sizes, and initiates coordination with other collaborators. ",
"sig": "8020509dfad33fde4eebf060a9d3c6f65581a58bc97ef21354d00333c4e9f0cdba2d44b686763774f3da09d6f30879f87d07b8302b77910333cc30837ee1a70e"
}