99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
# standard imports
|
||
import logging
|
||
import re
|
||
import socket
|
||
import uuid
|
||
import json
|
||
|
||
logg = logging.getLogger(__file__)
|
||
|
||
|
||
def jsonrpc_request(method, params):
|
||
uu = uuid.uuid4()
|
||
return {
|
||
"jsonrpc": "2.0",
|
||
"id": str(uu),
|
||
"method": method,
|
||
"params": params,
|
||
}
|
||
|
||
class PlatformMiddleware:
|
||
|
||
# id for the request is not available, meaning we cannot easily short-circuit
|
||
# hack workaround
|
||
id_seq = -1
|
||
re_personal = re.compile('^personal_.*')
|
||
ipcaddr = None
|
||
|
||
|
||
def __init__(self, make_request, w3):
|
||
self.w3 = w3
|
||
self.make_request = make_request
|
||
raise AttributeError('ipcaddr not set')
|
||
|
||
|
||
# TODO: understand what format input params come in
|
||
# single entry input gives a tuple on params, wtf...
|
||
# dict input comes as [{}] and fails if not passed on as an array
|
||
@staticmethod
|
||
def _translate_params(params):
|
||
if params.__class__.__name__ == 'tuple':
|
||
r = []
|
||
for p in params:
|
||
r.append(p)
|
||
return r
|
||
|
||
if params.__class__.__name__ == 'list' and len(params) > 0:
|
||
return params[0]
|
||
|
||
return params
|
||
|
||
|
||
def __call__(self, method, suspect_params):
|
||
|
||
self.id_seq += 1
|
||
logg.debug('in middleware method {} params {} ipcpath {}'.format(method, suspect_params, self.ipcaddr))
|
||
|
||
if self.re_personal.match(method) != None:
|
||
params = PlatformMiddleware._translate_params(suspect_params)
|
||
# multiple providers is removed in web3.py 5.12.0
|
||
# https://github.com/ethereum/web3.py/issues/1701
|
||
# thus we need a workaround to use the same web3 instance
|
||
s = socket.socket(family=socket.AF_UNIX, type=socket.SOCK_STREAM, proto=0)
|
||
ipc_provider_workaround = s.connect(self.ipcaddr)
|
||
|
||
logg.info('redirecting method {} params {} original params {}'.format(method, params, suspect_params))
|
||
o = jsonrpc_request(method, params)
|
||
j = json.dumps(o)
|
||
logg.debug('send {}'.format(j))
|
||
s.send(j.encode('utf-8'))
|
||
r = s.recv(4096)
|
||
s.close()
|
||
logg.debug('got recv {}'.format(str(r)))
|
||
jr = json.loads(r)
|
||
jr['id'] = self.id_seq
|
||
#return str(json.dumps(jr))
|
||
return jr
|
||
|
||
# TODO: DRY
|
||
elif method == 'eth_signTransaction':
|
||
params = PlatformMiddleware._translate_params(suspect_params)
|
||
s = socket.socket(family=socket.AF_UNIX, type=socket.SOCK_STREAM, proto=0)
|
||
ipc_provider_workaround = s.connect(self.ipcaddr)
|
||
logg.info('redirecting method {} params {} original params {}'.format(method, params, suspect_params))
|
||
o = jsonrpc_request(method, params)
|
||
j = json.dumps(o)
|
||
logg.debug('send {}'.format(j))
|
||
s.send(j.encode('utf-8'))
|
||
r = s.recv(4096)
|
||
s.close()
|
||
logg.debug('got recv {}'.format(str(r)))
|
||
jr = json.loads(r)
|
||
jr['id'] = self.id_seq
|
||
#return str(json.dumps(jr))
|
||
return jr
|
||
|
||
|
||
r = self.make_request(method, suspect_params)
|
||
return r
|