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jupyter.py
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jupyter.py
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from concurrent.futures import Future
from typing import Any
import contextlib
from inspect import isawaitable, iscoroutinefunction
import asyncio
import threading
import nest_asyncio
nest_asyncio.apply()
import sys
import time
import ipykernel.comm
import IPython.display as frontend
from jupyter_core.utils import run_sync
from eth_account import Account
from eth_account._utils.signing import encode_transaction,serializable_unsigned_transaction_from_dict
from eth_utils import to_checksum_address
from boa.rpc import to_bytes, to_int, to_hex
ZMQ_POLLOUT = 2 # zmq.POLLOUT without zmq dependency
js0 = frontend.Javascript("""
require.config({
paths: {
//ethers: "https://cdnjs.cloudflare.com/ajax/libs/ethers/5.7.2/ethers.umd.min"
ethers: "https://cdnjs.cloudflare.com/ajax/libs/ethers/6.4.2/ethers.umd.min"
}
});
require(['ethers'], function(ethers) {
// Initialize ethers
let provider = new ethers.BrowserProvider(window.ethereum);
Jupyter.notebook.kernel.comm_manager.register_target('sign_transaction', function(c, msg) {
c.on_msg(function(msg) {
let tx_data = msg.content.data.transaction_data;
let account = msg.content.data.account
console.log("debug", msg.content.data);
provider.getSigner(account).then(signer => {
signer.sendTransaction(tx_data).then(response => {
c.send({"success": response});
}).catch(function(error) {
// TODO percolate upstream
console.error(error);
});
}).catch(function(error) {
// TODO percolate upstream
console.error(error);
});
});
});
});
""")
js = frontend.Javascript("""
console.log("FIRST", Jupyter.notebook.kernel.comm_manager)
Jupyter.notebook.kernel.comm_manager.register_target("sign_transaction", function(comm, msg) {
console.log("ENTER", comm);
/*comm.on_close(function(msg) {
console.log("CLOSING", msg);
});
*/
comm.on_msg(function(msg) {
console.log("ENTER 2", comm);
console.log("ENTER 3", msg.content.data);
setTimeout(() => {
comm.send({"success": "hello", "echo": msg.content.data});
comm.close();
console.log(comm);
}, 1000);
});
});
""")
#frontend.display(js)
frontend.display(js0)
# adapted from:
# https://github.com/Kirill888/jupyter-ui-poll/blob/cb3fa2dbcb75/jupyter_ui_poll/_poll.py
class _UIComm(ipykernel.comm.Comm):
# this entire class is cursed. do not touch!
def __init__(self, *args, shell=None, loop=None, **kwargs):
if loop is None:
loop = asyncio.get_running_loop()
self._loop = loop
self._future = asyncio.futures.Future()
if shell is None:
shell = get_ipython()
kernel = shell.kernel
self._shell = shell
self._kernel = kernel
self._original_parent = (
kernel._parent_ident,
kernel.get_parent() # ipykernel 6+
if hasattr(kernel, "get_parent")
else kernel._parent_header, # ipykernel < 6
)
self._suspended_events: list[tuple[Any, Any, Any]] = []
self._backup_execute_request = kernel.shell_handlers["execute_request"]
if iscoroutinefunction(self._backup_execute_request): # ipykernel 6+
kernel.shell_handlers["execute_request"] = self._execute_request_async
else:
# ipykernel < 6
kernel.shell_handlers["execute_request"] = self._execute_request
shell.events.register("post_execute", self._post_execute_hook)
super().__init__(*args, **kwargs)
def _restore(self):
if self._backup_execute_request is not None:
self._kernel.shell_handlers["execute_request"] = self._backup_execute_request
self._backup_execute_request = None
def _reset_parent(self):
self._kernel.set_parent(*self._original_parent)
def _execute_request(self, stream, ident, parent):
# store away execute request for later and reset io back to the original cell
self._suspended_events.append((stream, ident, parent))
self._reset_parent()
async def _execute_request_async(self, stream, ident, parent):
self._execute_request(stream, ident, parent)
def _flush_stdio(self):
sys.stdout.flush()
sys.stderr.flush()
async def _replay(self):
k = self._kernel
self._restore()
shell_stream = getattr(
k, "shell_stream", None
) # ipykernel 6 vs 5 differences
for stream, ident, parent in self._suspended_events:
k.set_parent(ident, parent)
if k._aborting:
k._send_abort_reply(stream, parent, ident)
else:
rr = k.execute_request(stream, ident, parent)
if isawaitable(rr):
with self._preempt_current_task():
await rr
# replicate shell_dispatch behaviour
self._flush_stdio()
if shell_stream is not None: # 6+
k._publish_status("idle", "shell")
shell_stream.flush(ZMQ_POLLOUT)
else:
k._publish_status("idle")
async def do_one_iteration(self):
try:
rr = self._kernel.do_one_iteration()
cond = isawaitable(rr)
if isawaitable(rr): # 6+
await rr
#except Exception: # pylint: disable=broad-except
# # it's probably a bug in ipykernel,
# # .do_one_iteration() should not throw
# return
finally:
# reset stdio back to original cell
self._flush_stdio()
self._reset_parent()
def _post_execute_hook(self, *args, **kwargs):
self._shell.events.unregister("post_execute", self._post_execute_hook)
self._restore()
asyncio.ensure_future(self._replay(), loop=self._loop)
async def _poll_async(self):
while True:
if self._future.done():
return self._future.result()
# give the buffers some time to flush.
# but this is cursed! time.sleep does not work.
await asyncio.sleep(0.001)
await self.do_one_iteration()
@staticmethod
@contextlib.contextmanager
def _preempt_current_task(loop = None):
# note: cursed code. do not touch!
# use asyncio internals; suspend current task to avoid race conditions
if loop is None:
loop = asyncio.get_running_loop()
try:
# i.e., asyncio._leave_task(loop, tsk) with no checks
tsk = asyncio.tasks._current_tasks.pop(loop, None)
yield
finally:
# i.e., asyncio._enter_task(loop, tsk) with no checks
if tsk is not None:
asyncio.tasks._current_tasks[loop] = tsk
else:
asyncio.tasks._current_tasks.pop(loop, None)
def poll(self):
return self._loop.run_until_complete(self._poll_async())
# a test function
def foo():
comm = _UIComm(target_name="sign_transaction")
@comm.on_msg
def _recv(msg):
comm._future.set_result(msg)
comm.send({"foo": "bar"})
response = comm.poll()
return response
class BrowserSigner(Account):
def __init__(self, address):
self.address = to_checksum_address(address)
def sign_transaction(self, tx_data):
comm = _UIComm(target_name="sign_transaction")
@comm.on_msg
def _recv(msg):
try:
res = msg["content"]["data"]
if "success" not in res:
raise ValueError(res)
comm._future.set_result(res["success"])
except Exception as e:
comm._future.set_exception(e)
comm.send({"transaction_data": tx_data, "account": self.address})
print("waiting.")
# Wait for the future to complete
response = comm.poll()
# --> KERNEL DIES SOME TIME AFTER HERE <--
print(response)
# convert ethers.js TransactionResponse to a
# fake `eth_account.datastructures.SignedTransaction` for downstream code
sig = response.pop("signature")
v, r, s = sig["v"], to_int(sig["r"]), to_int(sig["s"])
print((v,r,s))
# trim unused fields
for k in ('from', '_type', 'gasPrice', 'hash'):
response.pop(k)
# rename metamask field
if "gasLimit" in response:
response["gas"] = response.pop("gasLimit")
def try_cast_int(s):
# cast js bigint to string
if isinstance(s, str) and s.isnumeric():
return int(s)
return s
# TODO: use trim_dict util here
response = {k: v for (k, v) in response.items() if bool(v)}
# cast js bigint values
response = {k: try_cast_int(v) for (k, v) in response.items()}
raw_tx = lambda: None
raw_tx.rawTransaction = encode_transaction(serializable_unsigned_transaction_from_dict(response), vrs=(v,r,s))
return raw_tx