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change(chain): raise ZIP 317 block production weight_ratio_cap from 4 to 10 #11290

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change(chain): raise ZIP 317 block production weight_ratio_cap from 4 to 10 #11290

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change(chain): raise ZIP 317 block production weight_ratio_cap from 4…
aphelionz Aug 18, 2026
ca22b60
change(chain): add changelog entry for #11290
aphelionz Aug 18, 2026
588e9da
Merge branch 'main' into raise-zip317-weight-ratio-cap
aphelionz Aug 19, 2026
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4 changes: 4 additions & 0 deletions .changes/unreleased/zebrad-Changed-20260818-205730.yaml
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@@ -0,0 +1,4 @@
project: zebrad
kind: Changed
body: 'Block template construction now caps the ZIP-317 fee weight ratio at 10 instead of 4, widening the priority lane for transactions that pay more than their conventional fee ([#11290](https://github.com/ZcashFoundation/zebra/pull/11290)).'
time: 2026-08-18T20:57:30.000000000Z
7 changes: 5 additions & 2 deletions zebra-chain/src/transaction/unmined/zip317.rs
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Expand Up @@ -31,9 +31,12 @@ const P2PKH_STANDARD_INPUT_SIZE: usize = 150;
/// The standard size of p2pkh outputs for the ZIP-317 fee calculation, in bytes.
const P2PKH_STANDARD_OUTPUT_SIZE: usize = 34;

/// The recommended weight ratio cap for ZIP-317 block production.
/// The weight ratio cap for ZIP-317 block production.
/// `weight_ratio_cap` in ZIP-317.
const BLOCK_PRODUCTION_WEIGHT_RATIO_CAP: f32 = 4.0;
///
/// This is higher than the ZIP-317 recommended value of 4, widening the priority
/// lane for transactions that pay more than their conventional fee.
const BLOCK_PRODUCTION_WEIGHT_RATIO_CAP: f32 = 10.0;

/// The minimum fee for the block production weight ratio calculation, in zatoshis.
/// If a transaction has a lower fee, this value is used instead.
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