From 509097ce47d7bcbf9074371c6099ea143e414f69 Mon Sep 17 00:00:00 2001
From: Petar Ivanov <29689712+dartdart26@users.noreply.github.com>
Date: Fri, 3 Nov 2023 10:50:06 +0200
Subject: [PATCH] feat: support fractional gas cost for calldata

---
 fhevm/params.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fhevm/params.go b/fhevm/params.go
index 25ee02a..88ef8ca 100644
--- a/fhevm/params.go
+++ b/fhevm/params.go
@@ -110,4 +110,11 @@ var (
 	FheUint8TrivialEncryptGas  uint64 = 100
 	FheUint16TrivialEncryptGas uint64 = 200
 	FheUint32TrivialEncryptGas uint64 = 400
+
+	// A byte of data attached to a transaction has fractional cost: 1 / TxDataFractionalGasFactor.
+	TxDataFractionalGasFactor uint64 = 4
 )
+
+func TxDataFractionalGas(originalGas uint64) (fractionalGas uint64) {
+	return originalGas / TxDataFractionalGasFactor
+}