From 875b0251144ee24ef5b69d17e4ff68f303513f44 Mon Sep 17 00:00:00 2001
From: Gav Wood <i@gavwood.com>
Date: Tue, 7 Oct 2014 18:00:10 +0200
Subject: [PATCH] PoC-7: Remove POST, move CALLSTATELESS -> CALLCODE = 0xf3.

---
 libevm/VM.h                | 33 ++-------------------------------
 libevmface/Instruction.cpp |  6 ++----
 libevmface/Instruction.h   |  3 +--
 3 files changed, 5 insertions(+), 37 deletions(-)

diff --git a/libevm/VM.h b/libevm/VM.h
index 04804ffd5..33a40e6c6 100644
--- a/libevm/VM.h
+++ b/libevm/VM.h
@@ -171,18 +171,12 @@ template <class Ext> dev::bytesConstRef dev::eth::VM::go(Ext& _ext, OnOpFunc con
 			newTempSize = std::max(memNeed(m_stack[m_stack.size() - 6], m_stack[m_stack.size() - 7]), memNeed(m_stack[m_stack.size() - 4], m_stack[m_stack.size() - 5]));
 			break;
 
-		case Instruction::CALLSTATELESS:
+		case Instruction::CALLCODE:
 			require(7);
 			runGas = c_callGas + m_stack[m_stack.size() - 1];
 			newTempSize = std::max(memNeed(m_stack[m_stack.size() - 6], m_stack[m_stack.size() - 7]), memNeed(m_stack[m_stack.size() - 4], m_stack[m_stack.size() - 5]));
 			break;
 
-		case Instruction::POST:
-			require(5);
-			runGas = c_callGas + m_stack[m_stack.size() - 1];
-			newTempSize = memNeed(m_stack[m_stack.size() - 4], m_stack[m_stack.size() - 5]);
-			break;
-
 		case Instruction::CREATE:
 		{
 			require(3);
@@ -611,7 +605,7 @@ template <class Ext> dev::bytesConstRef dev::eth::VM::go(Ext& _ext, OnOpFunc con
 			break;
 		}
 		case Instruction::CALL:
-		case Instruction::CALLSTATELESS:
+		case Instruction::CALLCODE:
 		{
 			require(7);
 
@@ -662,29 +656,6 @@ template <class Ext> dev::bytesConstRef dev::eth::VM::go(Ext& _ext, OnOpFunc con
 		}
 		case Instruction::STOP:
 			return bytesConstRef();
-		case Instruction::POST:
-		{
-			require(5);
-
-			u256 gas = m_stack.back();
-			m_stack.pop_back();
-			u160 receiveAddress = asAddress(m_stack.back());
-			m_stack.pop_back();
-			u256 value = m_stack.back();
-			m_stack.pop_back();
-
-			unsigned inOff = (unsigned)m_stack.back();
-			m_stack.pop_back();
-			unsigned inSize = (unsigned)m_stack.back();
-			m_stack.pop_back();
-
-			if (_ext.balance(_ext.myAddress) >= value)
-			{
-				_ext.subBalance(value);
-				_ext.post(receiveAddress, value, bytesConstRef(m_temp.data() + inOff, inSize), gas);
-			}
-			break;
-		}
 		default:
 			BOOST_THROW_EXCEPTION(BadInstruction());
 		}
diff --git a/libevmface/Instruction.cpp b/libevmface/Instruction.cpp
index f8c7f5078..b9ade2c2d 100644
--- a/libevmface/Instruction.cpp
+++ b/libevmface/Instruction.cpp
@@ -148,9 +148,8 @@ const std::map<std::string, Instruction> dev::eth::c_instructions =
 	{ "SWAP16", Instruction::SWAP16 },
 	{ "CREATE", Instruction::CREATE },
 	{ "CALL", Instruction::CALL },
-	{ "CALLSTATELESS", Instruction::CALLSTATELESS },
+	{ "CALLCODE", Instruction::CALLCODE },
 	{ "RETURN", Instruction::RETURN },
-	{ "POST", Instruction::POST },
 	{ "SUICIDE", Instruction::SUICIDE }
 };
 
@@ -275,9 +274,8 @@ static const std::map<Instruction, InstructionInfo> c_instructionInfo =
 	{ Instruction::SWAP16,		{ "SWAP16",			0, 17, 17 } },
 	{ Instruction::CREATE,		{ "CREATE",			0, 3, 1 } },
 	{ Instruction::CALL,		{ "CALL",			0, 7, 1 } },
-	{ Instruction::CALLSTATELESS, { "CALLSTATELESS",0, 7, 1 } },
+	{ Instruction::CALLCODE, { "CALLCODE",0, 7, 1 } },
 	{ Instruction::RETURN,		{ "RETURN",			0, 2, 0 } },
-	{ Instruction::POST,		{ "POST",			0, 5, 0 } },
 	{ Instruction::SUICIDE,		{ "SUICIDE",		0, 1, 0} }
 };
 
diff --git a/libevmface/Instruction.h b/libevmface/Instruction.h
index 6c87b7a76..001d778a8 100644
--- a/libevmface/Instruction.h
+++ b/libevmface/Instruction.h
@@ -163,8 +163,7 @@ enum class Instruction: uint8_t
 	CREATE = 0xf0,		///< create a new account with associated code
 	CALL,				///< message-call into an account
 	RETURN,				///< halt execution returning output data
-	POST,				///< asynchronous call without output (adds a message to the post queue)
-	CALLSTATELESS,
+	CALLCODE,
 	SUICIDE = 0xff		///< halt execution and register account for later deletion
 };