From 2251a824045366f148cd0c8214a41e77ef30d7b0 Mon Sep 17 00:00:00 2001
From: Yeastplume <yeastplume@gmail.com>
Date: Thu, 23 Aug 2018 18:53:42 +0100
Subject: [PATCH] batch verify proofs during validation (#1412)

* batch verify proofs during validation

* don't attempt to batch verify proofs with empty vec
---
 core/src/core/transaction.rs | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/core/src/core/transaction.rs b/core/src/core/transaction.rs
index 954e3667b..32b9ff194 100644
--- a/core/src/core/transaction.rs
+++ b/core/src/core/transaction.rs
@@ -457,9 +457,18 @@ impl TransactionBody {
 	/// Verify all the output rangeproofs.
 	/// Note: this is expensive.
 	fn verify_rangeproofs(&self) -> Result<(), Error> {
-		for x in &self.outputs {
-			x.verify_proof()?;
+		let mut commits: Vec<Commitment> = vec![];
+		let mut proofs: Vec<RangeProof> = vec![];
+		if self.outputs.len() == 0 {
+			return Ok(());
 		}
+		// unfortunately these have to be aligned in memory for the underlying
+		// libsecp call
+		for x in &self.outputs {
+			commits.push(x.commit.clone());
+			proofs.push(x.proof.clone());
+		}
+		Output::batch_verify_proofs(&commits, &proofs)?;
 		Ok(())
 	}