From 7755ee3e4f5ee534252a524a668e58714f944408 Mon Sep 17 00:00:00 2001
From: Tristan-Wilson <87238672+Tristan-Wilson@users.noreply.github.com>
Date: Mon, 10 Nov 2025 09:38:28 +0100
Subject: [PATCH] consensus/misc/eip4844: expose TargetBlobsPerBlock (#32991)

Rollups may want to use these to dynamically adjust blobs posted after
BPO forks.
---
 consensus/misc/eip4844/eip4844.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/consensus/misc/eip4844/eip4844.go b/consensus/misc/eip4844/eip4844.go
index e14d129561..c1a21195e3 100644
--- a/consensus/misc/eip4844/eip4844.go
+++ b/consensus/misc/eip4844/eip4844.go
@@ -200,6 +200,15 @@ func LatestMaxBlobsPerBlock(cfg *params.ChainConfig) int {
 	return bcfg.Max
 }
 
+// TargetBlobsPerBlock returns the target blobs per block for a block at the given timestamp.
+func TargetBlobsPerBlock(cfg *params.ChainConfig, time uint64) int {
+	blobConfig := latestBlobConfig(cfg, time)
+	if blobConfig == nil {
+		return 0
+	}
+	return blobConfig.Target
+}
+
 // fakeExponential approximates factor * e ** (numerator / denominator) using
 // Taylor expansion.
 func fakeExponential(factor, numerator, denominator *big.Int) *big.Int {