From a954ce5f2d21ad09460d45006a6ff4f5267a6095 Mon Sep 17 00:00:00 2001
From: Alan Sapede <alan.sapede@gmail.com>
Date: Fri, 9 Oct 2020 17:34:07 -0400
Subject: [PATCH] Fixes evm ripemd160 impl to use 32 bytes (#7296)

Co-authored-by: Alan <alan@ip-172-31-37-206.us-east-2.compute.internal>
---
 substrate/frame/evm/src/precompiles.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/substrate/frame/evm/src/precompiles.rs b/substrate/frame/evm/src/precompiles.rs
index 987724285d..440d9bf1c6 100644
--- a/substrate/frame/evm/src/precompiles.rs
+++ b/substrate/frame/evm/src/precompiles.rs
@@ -145,8 +145,9 @@ impl Precompile for Ripemd160 {
 	) -> core::result::Result<(ExitSucceed, Vec<u8>, usize), ExitError> {
 		let cost = ensure_linear_cost(target_gas, input.len(), 600, 120)?;
 
-		let ret = ripemd160::Ripemd160::digest(input).to_vec();
-		Ok((ExitSucceed::Returned, ret, cost))
+		let mut ret = [0u8; 32];
+		ret[12..32].copy_from_slice(&ripemd160::Ripemd160::digest(input));
+		Ok((ExitSucceed::Returned, ret.to_vec(), cost))
 	}
 }