Initial commit

.gitignore

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+__pycache__
+gmon.out
+*.pyc
+dist/
+build/
+*.egg-info

chaind_eth/runnable/server.py

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+# standard imports
+import syslog
+import sys
+import time
+import socket
+import signal
+import os
+import logging
+import stat
+import argparse
+import uuid
+
+# external imports
+import confini
+from xdg.BaseDirectory import (
+        xdg_data_dirs,
+        get_runtime_dir,
+        load_first_config,
+        )
+from hexathon import strip_0x
+from chainlib.chain import ChainSpec
+from chainlib.eth.connection import EthHTTPConnection
+from chainqueue.sql.backend import SQLBackend
+from chainqueue.db import dsn_from_config
+
+# local imports
+from chainqueue.adapters.eth import EthAdapter
+
+logging.basicConfig(level=logging.WARNING)
+logg = logging.getLogger()
+
+default_config_dir = load_first_config('chainqueue')
+config_dir = os.environ.get('CONFINI_DIR', default_config_dir)
+
+default_runtime_dir = os.path.join(get_runtime_dir(), 'chainqueue')
+default_data_dir = os.path.join(xdg_data_dirs[0], 'chainqueue')
+
+argparser = argparse.ArgumentParser('chainqueue transaction submission and trigger server')
+argparser.add_argument('-c', '--config', dest='c', type=str, default=config_dir, help='configuration directory')
+argparser.add_argument('-p', type=str, help='rpc endpoint')
+argparser.add_argument('-i', type=str, help='chain spec')
+argparser.add_argument('--runtime-dir', dest='runtime_dir', type=str, default=default_runtime_dir, help='runtime directory')
+argparser.add_argument('--data-dir', dest='data_dir', type=str, default=default_data_dir, help='data directory')
+argparser.add_argument('--session-id', dest='session_id', type=str, default=str(uuid.uuid4()), help='session id to use for session')
+argparser.add_argument('-v', action='store_true', help='be verbose')
+argparser.add_argument('-vv', action='store_true', help='be very verbose')
+args = argparser.parse_args(sys.argv[1:])
+
+if args.vv:
+    logg.setLevel(logging.DEBUG)
+elif args.v:
+    logg.setLevel(logging.INFO)
+
+# process config
+config = confini.Config(args.c)
+config.process()
+args_override = {
+            'SESSION_RUNTIME_DIR': getattr(args, 'runtime_dir'),
+            'SESSION_CHAIN_SPEC': getattr(args, 'i'),
+            'RPC_ENDPOINT': getattr(args, 'p'),
+            'PATH_DATA': getattr(args, 'data_dir'),
+        }
+config.dict_override(args_override, 'cli args')
+config.add(getattr(args, 'session_id'), '_SESSION_ID', True)
+
+if not config.get('SESSION_SOCKET_PATH'):
+    socket_path = os.path.join(config.get('SESSION_RUNTIME_DIR'), config.get('_SESSION_ID'), 'chainqueue.sock')
+    config.add(socket_path, 'SESSION_SOCKET_PATH', True)
+
+if config.get('DATABASE_ENGINE') == 'sqlite':
+    config.add(os.path.join(config.get('PATH_DATA'), config.get('DATABASE_NAME')), 'DATABASE_NAME', True)
+    
+
+logg.debug('config loaded:\n{}'.format(config))
+
+
+# verify setup
+try:
+    os.stat(config.get('DATABASE_NAME'))
+except FileNotFoundError:
+    sys.stderr.write('database file {} not found. please run database migration script first'.format(config.get('DATABASE_NAME')))
+    sys.exit(1)
+
+
+class SessionController:
+
+    def __init__(self, config):
+        self.dead = False
+        os.makedirs(os.path.dirname(config.get('SESSION_SOCKET_PATH')), exist_ok=True)
+        try:
+            os.unlink(config.get('SESSION_SOCKET_PATH'))
+        except FileNotFoundError:
+            pass
+
+        self.srv = socket.socket(family=socket.AF_UNIX, type=socket.SOCK_STREAM)
+        self.srv.bind(config.get('SESSION_SOCKET_PATH'))
+        self.srv.listen(2)
+        self.srv.settimeout(4.0)
+
+    def shutdown(self, signo, frame):
+        if self.dead:
+            return
+        self.dead = True
+        if signo != None:
+            syslog.syslog('closing on {}'.format(signo))
+        else:
+            syslog.syslog('explicit shutdown')
+        sockname = self.srv.getsockname()
+        self.srv.close()
+        try:
+            os.unlink(sockname)
+        except FileNotFoundError:
+            logg.warning('socket file {} already gone'.format(sockname))
+
+
+    def get_connection(self):
+        return self.srv.accept()
+
+
+ctrl = SessionController(config)
+
+signal.signal(signal.SIGINT, ctrl.shutdown)
+signal.signal(signal.SIGTERM, ctrl.shutdown)
+
+chain_spec = ChainSpec.from_chain_str(config.get('SESSION_CHAIN_SPEC'))
+
+dsn = dsn_from_config(config)
+backend = SQLBackend(dsn, debug=config.true('DATABASE_DEBUG'))
+adapter = EthAdapter(backend)
+rpc = EthHTTPConnection(url=config.get('RPC_ENDPOINT'), chain_spec=chain_spec)
+
+def main():
+    havesends = 0
+    while True:
+        srvs = None
+        try:
+            logg.debug('getting connection')
+            (srvs, srvs_addr) = ctrl.get_connection()
+        except OSError as e:
+            havesends = 0
+            try:
+                fi = os.stat(config.get('SESSION_SOCKET_PATH'))
+            except FileNotFoundError:
+                logg.error('socket is gone')
+                break
+            if not stat.S_ISSOCK(fi.st_mode):
+                logg.error('entity on socket path is not a socket')
+                break
+            if srvs == None:
+                logg.debug('timeout (remote socket is none)')
+                txs = adapter.upcoming(chain_spec)
+                for k in txs.keys():
+                    havesends += 1
+                    logg.debug('txs {} {}'.format(k, txs[k]))
+                    adapter.dispatch(chain_spec, rpc, k, txs[k])
+                if havesends > 0:
+                    ctrl.srv.settimeout(0.1)
+                else:
+                    ctrl.srv.settimeout(4.0)
+                continue
+        ctrl.srv.settimeout(0.1)
+        srvs.settimeout(0.1)
+        data_in = None
+        try:
+            data_in = srvs.recv(1024)
+        except BlockingIOError as e:
+            logg.debug('block io error: {}'.format(e))
+            continue
+
+        data = None
+        try:
+            data_in_str = data_in.decode('utf-8')
+            data = bytes.fromhex(strip_0x(data_in_str))
+        except ValueError:
+            logg.error('invalid input "{}"'.format(data_in_str))
+            continue
+
+        logg.debug('recv {} bytes'.format(len(data)))
+        r = adapter.add(chain_spec, data)
+        r = srvs.send(r.to_bytes(4, byteorder='big'))
+        logg.debug('{} bytes sent'.format(r))
+        srvs.close()
+
+    ctrl.shutdown(None, None)
+
+if __name__ == '__main__':
+    main()

chainqueue/adapters/eth.py

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+# external imports
+from chainlib.eth.constant import ZERO_ADDRESS
+from chainlib.eth.tx import (
+        unpack,
+        raw,
+        )
+from hexathon import (
+        add_0x,
+        strip_0x,
+        )
+
+# local imports
+from chainqueue.adapters.base import Adapter
+from chainqueue.enum import StatusBits
+
+
+class EthAdapter(Adapter):
+
+    def translate(self, bytecode, chain_spec):
+        tx = unpack(bytecode, chain_spec)
+        tx['source_token'] = ZERO_ADDRESS
+        tx['destination_token'] = ZERO_ADDRESS
+        tx['from_value'] = tx['value']
+        tx['to_value'] = tx['value']
+        return tx
+
+
+    def add(self, chain_spec, bytecode):
+        tx = self.translate(bytecode, chain_spec)
+        session = self.backend.create_session()
+        r = self.backend.create(chain_spec, tx['nonce'], tx['from'], tx['hash'], add_0x(bytecode.hex()), session=session)
+        if r:
+            session.rollback()
+            session.close()
+            return r
+        r = self.backend.cache(tx, session=session)
+        session.commit()
+        session.close()
+        return r
+
+
+    def cache(self, chain_spec):
+        session = self.backend.create_session()
+        r = self.backend.create(chain_spec, tx['nonce'], tx['from'], tx['hash'], add_0x(bytecode.hex()), session=session)
+        session.close()
+
+
+    def upcoming(self, chain_spec):
+        return self.backend.get(chain_spec, StatusBits.QUEUED, unpack)
+
+
+    def dispatch(self, chain_spec, rpc, tx_hash, signed_tx):
+        o = raw(signed_tx)
+        session = self.backend.create_session()
+        r = self.backend.dispatch(chain_spec, rpc, tx_hash, o)
+        session.close()
+        return r

requirements.txt

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+chainlib>0.0.2,<=0.0.3
+chainqueue>0.0.1,<=.0.0.2
+chainsyncer>0.0.1,<=0.0.2
+confini>0.3.5,<=0.3.6
+pyxdg~=0.26
+hexathon~=0.0.1a7

setup.cfg

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+[metadata]
+name = chaind-eth
+version = 0.0.1a1
+description = Queue server for ethereum
+author = Louis Holbrook
+author_email = dev@holbrook.no
+url = https://gitlab.com/chaintools/chainqueue
+keywords =
+	cic
+	cryptocurrency
+	ethereum
+	solidarity
+	mutual_credit
+classifiers =
+	Programming Language :: Python :: 3
+	Operating System :: OS Independent
+	Development Status :: 3 - Alpha
+	Environment :: Console
+	Intended Audience :: Developers
+	License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
+	Topic :: Internet
+#	Topic :: Blockchain :: EVM
+license = GPL3
+licence_files =
+	LICENSE.txt
+
+[options]
+python_requires = >= 3.6
+packages = 
+	chaind_eth.runnable
+	chainqueue.adapters
+
+[options.entry_points]
+console_scripts =
+	chaind-eth-server = chaind_eth.runnable.server:main

setup.py

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+from setuptools import setup
+import configparser
+import os
+
+
+requirements = []
+f = open('requirements.txt', 'r')
+while True:
+    l = f.readline()
+    if l == '':
+        break
+    requirements.append(l.rstrip())
+f.close()
+
+test_requirements = []
+f = open('test_requirements.txt', 'r')
+while True:
+    l = f.readline()
+    if l == '':
+        break
+    test_requirements.append(l.rstrip())
+f.close()
+
+postgres_requirements = [
+    'psycopg2==2.8.6',
+        ] + requirements
+sqlite_requirements = [
+        ] + requirements
+setup(
+        install_requires=requirements,
+        tests_require=test_requirements,
+        extras_require={
+            'postgres': postgres_requirements,
+            'sqlite': sqlite_requirements,
+            }
+    )