From 49c0b80b35b7b069fa5657cc9d64ff82e3610800 Mon Sep 17 00:00:00 2001
From: Kirill Fedoseev <k.fedoseev@innopolis.university>
Date: Fri, 3 Jan 2020 03:16:58 +0700
Subject: [PATCH] Updated minimum gas usage estimation (#355)

---
 .../arbitrary_message/MessageDelivery.sol                      | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/contracts/upgradeable_contracts/arbitrary_message/MessageDelivery.sol b/contracts/upgradeable_contracts/arbitrary_message/MessageDelivery.sol
index 4aaacd7e3..ae2f0c192 100644
--- a/contracts/upgradeable_contracts/arbitrary_message/MessageDelivery.sol
+++ b/contracts/upgradeable_contracts/arbitrary_message/MessageDelivery.sol
@@ -14,7 +14,8 @@ contract MessageDelivery is BasicAMB {
     function getMinimumGasUsage(bytes _data) public pure returns (uint256 gas) {
         //From Ethereum Yellow Paper
         // 68 gas is paid for every non-zero byte of data or code for a transaction
-        return _data.length.mul(68);
+        // Starting from Istanbul hardfork, 16 gas is paid (EIP-2028)
+        return _data.length.mul(16);
     }
 
     /* solcov ignore next */