From e33346d944479d5b5596aaee8c43c5090f6d0040 Mon Sep 17 00:00:00 2001
From: bt3gl <1130416+bt3gl@users.noreply.github.com>
Date: Fri, 11 Mar 2022 04:29:11 +0000
Subject: [PATCH] Update ethereum.md

---
 blockchains/ethereum.md | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/blockchains/ethereum.md b/blockchains/ethereum.md
index 523a45d..e670819 100644
--- a/blockchains/ethereum.md
+++ b/blockchains/ethereum.md
@@ -30,4 +30,12 @@
 
 * a message is like a transaction, except it is produced by a contract and not an external actor. A message is produced when a cotnract currently executing code executes the CALL opcode.
 
-* the code in Ethereum contracts is written in
+### Code execution
+
+* the code in Ethereum contracts is written in a low-level, stack-based bytecode language, referred as the EVM. 
+
+* The operations have access to three types of space in which to store data:
+  * the stack, a last-in-first-out container to which values can be pushed and popped
+  * memory, an infinite expandable byte array
+  * contract's long-term storage, a key/value store (persist long term)
+