New instructions (#1644)

* New instructions

* Update evm.py

* Link pyevmasm master

* blkn

* Fix pyevmasm dep

* Fix pyevmasm link

* Fix pyevmasm link

* Fix deps

* Remove bad merge

manticore/platforms/evm.py

@@ -97,7 +97,7 @@ def globalfakesha3(data):
 MASK160 = 2 ** 160 - 1
 TT255 = 2 ** 255
 TOOHIGHMEM = 0x1000
-DEFAULT_FORK = "constantinople"
+DEFAULT_FORK = "istanbul"
 
 # FIXME. We should just use a Transaction() for this
 PendingTransaction = namedtuple(
@@ -1605,6 +1605,9 @@ def BALANCE(self, account):
         """Get balance of the given account"""
         return self.world.get_balance(account)
 
+    def SELFBALANCE(self):
+        return self.world.get_balance(self.address)
+
     def ORIGIN(self):
         """Get execution origination address"""
         return Operators.ZEXTEND(self.world.tx_origin(), 256)
@@ -1774,6 +1777,12 @@ def EXTCODESIZE(self, account):
         """Get size of an account's code"""
         return len(self.world.get_code(account))
 
+    @concretized_args(account="ACCOUNTS")
+    def EXTCODEHASH(self, account):
+        """Get hash of code"""
+        bytecode = self.world.get_code(account)
+        return globalsha3(bytecode)
+
     def EXTCODECOPY_gas(self, account, address, offset, size):
         GCOPY = 3  # cost to copy one 32 byte word
         extbytecode = self.world.get_code(account)
@@ -1835,6 +1844,11 @@ def GASLIMIT(self):
         """Get the block's gas limit"""
         return self.world.block_gaslimit()
 
+    def CHAINID(self):
+        """Get current chainid."""
+        #  1:= Ethereum Mainnet - https://chainid.network/
+        return 1
+
     ############################################################################
     # Stack, Memory, Storage and Flow Operations
     def POP(self, a):

setup.py

@@ -50,15 +50,14 @@ def rtd_dependent_deps():
     python_requires=">=3.6",
     install_requires=[
         "pyyaml",
-        # evm dependencies
         "pysha3",
         "prettytable",
-        "pyevmasm==0.2.0",
         "rlp",
         "ply",
         "crytic-compile>=0.1.1",
         "wasm",
         "dataclasses; python_version < '3.7'",
+        "pyevmasm>=0.2.3",
         "psutil",
     ]
     + rtd_dependent_deps(),