From bf818ee9fca232b248efc47f29e09e1dabd3d2c5 Mon Sep 17 00:00:00 2001
From: valdok <valdo@beam-mw.com>
Date: Wed, 28 Jun 2023 02:37:00 +0300
Subject: [PATCH] evm WIP(6)

---
 bvm/evm.cpp | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/bvm/evm.cpp b/bvm/evm.cpp
index 471ece94a..bfd225118 100644
--- a/bvm/evm.cpp
+++ b/bvm/evm.cpp
@@ -111,6 +111,8 @@ void EvmProcessor::InitVars()
 	macro(0x36, calldatasize, 2) \
 	macro(0x38, codesize, 2) \
 	macro(0x39, codecopy, 3) \
+	macro(0x3b, extcodesize, 700) \
+	macro(0x3c, extcodecopy, 700) \
 	macro(0x46, chainid, 2) \
 	macro(0x50, pop, 2) \
 	macro(0x51, mload, 3) \
@@ -614,6 +616,41 @@ OnOpcode(codecopy)
 	memcpy(pDst, pSrc, nSize);
 }
 
+OnOpcode(extcodesize)
+{
+	auto* pS = p.GetContractData(Address::W2A(m_Stack.Pop()));
+
+	auto& wRes = m_Stack.Push();
+	if (pS)
+	{
+		Blob b;
+		pS->GetCode(b);
+		wRes = b.n;
+	}
+	else
+		wRes = Zero;
+}
+
+OnOpcode(extcodecopy)
+{
+	auto* pS = p.GetContractData(Address::W2A(m_Stack.Pop()));
+	Test(pS != nullptr);
+
+	auto& wOffsetDst = m_Stack.Pop();
+	auto nOffsetSrc = WtoU32(m_Stack.Pop());
+	auto nSize = WtoU32(m_Stack.Pop());
+
+	Blob code;
+	pS->GetCode(code);
+
+	auto nEndSrc = nOffsetSrc + nSize;
+	Test(nEndSrc >= nOffsetSrc);
+	Test(code.n >= nEndSrc);
+
+	auto* pDst = get_Memory(wOffsetDst, nSize);
+	memcpy(pDst, (const uint8_t*) code.p + nOffsetSrc, nSize);
+}
+
 OnOpcode(pop)
 {
 	m_Stack.Pop();