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Shelley mempool per-tx size check: do not include perTxOverhead #1352

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Jan 8, 2025
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Shelley mempool per-tx size check: do not include perTxOverhead #1352

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4 changes: 4 additions & 0 deletions ...ano/changelog.d/20250107_124744_alexander.esgen_shelley_mempool_txsize_check.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
### Patch

- Fixed a bug where a valid tx with less than `4` bytes less than the max tx
size would be incorrectly rejected by the mempool.
4 changes: 2 additions & 2 deletions ouroboros-consensus-cardano/src/shelley/Ouroboros/Consensus/Shelley/Ledger/Mempool.hs
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Expand Up @@ -328,9 +328,9 @@ txInBlockSize ::
txInBlockSize st (ShelleyTx _txid tx') =
validateMaybe (maxTxSizeUTxO txsz limit) $ do
guard $ txsz <= limit
Just $ IgnoringOverflow $ ByteSize32 $ fromIntegral txsz
Just $ IgnoringOverflow $ ByteSize32 $ fromIntegral txsz + perTxOverhead
where
txsz = perTxOverhead + (tx' ^. sizeTxF)
txsz = tx' ^. sizeTxF

pparams = getPParams $ tickedShelleyLedgerState st
limit = fromIntegral (pparams ^. L.ppMaxTxSizeL) :: Integer
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