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Edited ch09_fees.adoc with Atlas code editor

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ch09_fees.adoc
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@ -534,13 +534,15 @@ money from you.
Protocol developers have been working on mitigating problems with
transaction pinning for several years. One partial solution is
described in <<cpfp_carve_out>>. Several other solutions have been
proposed, and at least one solution is being actively ((("transaction fees", "fee bumping", "transaction pinning", startref="transaction-fee-bump-pin")))((("fee bumping", "transaction pinning", startref="fee-bump-pin")))((("transaction pinning", startref="transaction-pin")))((("RBF (replace by fee) fee bumping", "transaction pinning", startref="rbf-pin")))((("CPFP (child pays for parent) fee bumping", "transaction pinning", startref="cpfp-pin")))developed as of
proposed, and at least one solution is being actively ((("transaction fees", "fee bumping", "transaction pinning", startref="transaction-fee-bump-pin")))((("fee bumping", "transaction pinning", startref="fee-bump-pin")))((("transaction pinning", startref="transaction-pin")))((("RBF (replace by fee) fee bumping", "transaction pinning", startref="rbf-pin")))((("CPFP (child pays for parent) fee bumping", "transaction pinning", startref="cpfp-pin")))((("transaction fees", "fee bumping", "CPFP carve outs", id="transaction-fee-bump-carveout")))((("fee bumping", "CPFP carve outs", id="fee-bump-carveout")))((("carve outs (CPFP)", id="carveout")))((("CPFP (child pays for parent) fee bumping", "carve outs", id="cpfp-carveout")))developed as of
this writing&mdash;https://oreil.ly/300dv[ephemeral anchors].
[[cpfp_carve_out]]
=== CPFP Carve Out and Anchor Outputs
In 2018, ((("transaction fees", "fee bumping", "CPFP carve outs", id="transaction-fee-bump-carveout")))((("fee bumping", "CPFP carve outs", id="fee-bump-carveout")))((("carve outs (CPFP)", id="carveout")))((("CPFP (child pays for parent) fee bumping", "carve outs", id="cpfp-carveout")))developers working on LN had a problem.
++++
<p class="fix_tracking">
In 2018, developers working on LN had a problem.
Their protocol uses transactions that require signatures from two
different parties. Neither party wants to trust the other, so they sign
transactions at a point in the protocol when trust isn't needed,
@ -549,7 +551,8 @@ later time when the other party may not want to (or be able to) fulfill
its obligations. The problem with this approach is that the
transactions might need to be broadcast at an unknown time, far in the future, beyond any
reasonable ability to estimate an appropriate fee rate for the
transactions.
transactions.</p>
++++
In theory, the developers could have designed their transactions to
allow fee bumping with either RBF (using special sighash flags) or CPFP,