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Merge bitcoin/bitcoin#25382: doc requirement that replacement must have higher feerate than direct conflicts

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2224bcabc4 [doc] RBF feerate rule (glozow)

Pull request description:

  RBF policy requires the replacement transaction have a higher feerate than each of the directly conflicting transactions (see `PaysMoreThanConflicts`).
  It was pointed out that this rule is undocumented: https://github.com/bitcoin/bitcoin/pull/25038#discussion_r889064935

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  laanwj:
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    ACK https://github.com/bitcoin/bitcoin/pull/25382/commits/2224bcabc432ecaadd7cadda90ab41f0f455432c
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  t-bast:
    ACK https://github.com/bitcoin/bitcoin/pull/25382/commits/2224bcabc432ecaadd7cadda90ab41f0f455432c

Tree-SHA512: 0d3915100973b66d115c3294f3037d0c5473c00236c8823a4b2fe12ff172457af56c295b41ac0ef983de030f40f0817c046bb486bf60a5a593d1c4524fe1b9d2
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fanquake committed 2022-06-16 08:09:34 +01:00
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doc/policy/mempool-replacements.md
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@@ -51,6 +51,13 @@ other consensus and policy rules, each of the following conditions are met:
significant portions of the node's mempool using replacements with multiple directly conflicting
transactions, each with large descendant sets.
6. The replacement transaction's feerate is greater than the feerates of all directly conflicting
transactions.
*Rationale*: This rule was originally intended to ensure that the replacement transaction is
preferable for block-inclusion, compared to what would be removed from the mempool. This rule
predates ancestor feerate-based transaction selection.
This set of rules is similar but distinct from BIP125.
## History