%%capture
%run 02_stack.ipynb
%run 03_memory.ipynb
%run 04_storage.ipynb
%run 05_opcodes.ipynb
%run 06_stop.ipynb
%run 07_math.ipynb
%run push.ipynb
---------------------------------------------------------------------------
OSError Traceback (most recent call last)
File ~/python3.8/lib/python3.8/site-packages/IPython/core/magics/execution.py:701, in ExecutionMagics.run(self, parameter_s, runner, file_finder)
700 fpath = arg_lst[0]
--> 701 filename = file_finder(fpath)
702 except IndexError as e:
File ~/python3.8/lib/python3.8/site-packages/IPython/utils/path.py:90, in get_py_filename(name)
89 return py_name
---> 90 raise IOError("File `%r` not found." % name)
OSError: File `'02_stack.ipynb'` not found.
The above exception was the direct cause of the following exception:
Exception Traceback (most recent call last)
Cell In[1], line 1
----> 1 get_ipython().run_line_magic('run', '02_stack.ipynb')
2 get_ipython().run_line_magic('run', '03_memory.ipynb')
3 get_ipython().run_line_magic('run', '04_storage.ipynb')
File ~/python3.8/lib/python3.8/site-packages/IPython/core/interactiveshell.py:2417, in InteractiveShell.run_line_magic(self, magic_name, line, _stack_depth)
2415 kwargs['local_ns'] = self.get_local_scope(stack_depth)
2416 with self.builtin_trap:
-> 2417 result = fn(*args, **kwargs)
2419 # The code below prevents the output from being displayed
2420 # when using magics with decodator @output_can_be_silenced
2421 # when the last Python token in the expression is a ';'.
2422 if getattr(fn, magic.MAGIC_OUTPUT_CAN_BE_SILENCED, False):
File ~/python3.8/lib/python3.8/site-packages/IPython/core/magics/execution.py:712, in ExecutionMagics.run(self, parameter_s, runner, file_finder)
710 if os.name == 'nt' and re.match(r"^'.*'$",fpath):
711 warn('For Windows, use double quotes to wrap a filename: %run "mypath\\myfile.py"')
--> 712 raise Exception(msg) from e
713 except TypeError:
714 if fpath in sys.meta_path:
Exception: File `'02_stack.ipynb'` not found.
EVM#
Now we are going to put everything together.
Program Counter#
The program counter indexes into the bytecode. It tells the EVM which opcode to execute next
class EVM:
def __init__(self,
program,
gas,
value,
calldata=[]):
self.pc = 0
self.stack = Stack()
self.memory = Memory()
self.storage = Storage()
self.program = program
self.gas = gas
self.value = value
self.calldata = calldata
self.stop_flag = False
self.revert_flag = False
self.returndata = []
self.logs = []
def peek(self): return self.program[self.pc]
def gas_dec(self, amount):
if self.gas - amount < 0:
raise Exception("out of gas")
self.gas -= amount
def should_execute_next_opcode(self):
if self.pc > len(self.program)-1: return False
if self.stop_flag : return False
if self.revert_flag : return False
return True
def run(self):
while self.should_execute_next_opcode():
op = self.program[self.pc]
if op == STOP: stop(self)
if op == ADD: add(self)
if op == PUSH1: _push(self, 1)
def reset(self):
self.pc = 0
self.stack = Stack()
self.memory = Memory()
self.storage = Storage()