Change license classifier

Reviewed-on: #4

.gitignore

@@ -5,3 +5,4 @@ build/
 dist/
 *.html
 *.egg-info/
+.venv

CHANGELOG

@@ -1,3 +1,52 @@
+- 0.2.3
+	* Update wrong license file
+- 0.2.2
+	* Change license to AGPL3 and copyright waived to public domain
+- 0.2.1
+	* Implement shep 0.3.0
+	* Implement chainlib 0.4.x
+- 0.2.0
+	* Implement chainlib 0.3.0
+- 0.1.16
+	* Queue list cli tool
+	* State parser cli tool
+	* Provide pluggable renderer capability for queue list cli tool
+	* Move path and state query parsing to settings module
+	* Add queue path and digest parameters to base config
+- 0.1.15
+	* Upgrade shep to avoid sync in persist set
+- 0.1.14
+	* Upgrade shep to handle exception in filestore list
+- 0.1.13
+	* Remove sync on each get
+	* Upgrade shep to guarantee atomic state lock state
+- 0.1.12
+	* Raise correct exception from index store exists check
+- 0.1.11
+	* Allow for sync skip in store instantiation
+- 0.1.10
+	* Improve logging
+- 0.1.9
+	* Upgrade deps
+- 0.1.8
+	* Upgrade deps
+- 0.1.7 
+	* Improve logging
+- 0.1.6
+	* Sort upcoming queue item chronologically
+	* Add unit testing for upcoming query method
+- 0.1.5
+	* Add reserved state check method
+- 0.1.4
+	* Dependency cleanups
+- 0.1.3
+	* Add CLI args and config handling, settings object
+- 0.1.2
+	* Add CLI inspection tools
+- 0.1.1
+	* 
+- 0.1.0
+	* Replace state transitions with shep
 - 0.0.3
 	* cli tool for listing queue by address
 	* ensure lowercase hex input in db

LICENSE

@@ -1,5 +1,5 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
 
  Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
@@ -7,17 +7,15 @@
 
                             Preamble
 
-  The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
 
   The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works.  By contrast,
-the GNU General Public License is intended to guarantee your freedom to
+our General Public Licenses are intended to guarantee your freedom to
 share and change all versions of a program--to make sure it remains free
-software for all its users.  We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
+software for all its users.
 
   When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
@@ -26,44 +24,34 @@ them if you wish), that you receive source code or can get it if you
 want it, that you can change the software or use pieces of it in new
 free programs, and that you know you can do these things.
 
-  To protect your rights, we need to prevent others from denying you
-these rights or asking you to surrender the rights.  Therefore, you have
-certain responsibilities if you distribute copies of the software, or if
-you modify it: responsibilities to respect the freedom of others.
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
 
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must pass on to the recipients the same
-freedoms that you received.  You must make sure that they, too, receive
-or can get the source code.  And you must show them these terms so they
-know their rights.
+  A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
 
-  Developers that use the GNU GPL protect your rights with two steps:
-(1) assert copyright on the software, and (2) offer you this License
-giving you legal permission to copy, distribute and/or modify it.
+  The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community.  It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server.  Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
 
-  For the developers' and authors' protection, the GPL clearly explains
-that there is no warranty for this free software.  For both users' and
-authors' sake, the GPL requires that modified versions be marked as
-changed, so that their problems will not be attributed erroneously to
-authors of previous versions.
-
-  Some devices are designed to deny users access to install or run
-modified versions of the software inside them, although the manufacturer
-can do so.  This is fundamentally incompatible with the aim of
-protecting users' freedom to change the software.  The systematic
-pattern of such abuse occurs in the area of products for individuals to
-use, which is precisely where it is most unacceptable.  Therefore, we
-have designed this version of the GPL to prohibit the practice for those
-products.  If such problems arise substantially in other domains, we
-stand ready to extend this provision to those domains in future versions
-of the GPL, as needed to protect the freedom of users.
-
-  Finally, every program is threatened constantly by software patents.
-States should not allow patents to restrict development and use of
-software on general-purpose computers, but in those that do, we wish to
-avoid the special danger that patents applied to a free program could
-make it effectively proprietary.  To prevent this, the GPL assures that
-patents cannot be used to render the program non-free.
+  An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
 
   The precise terms and conditions for copying, distribution and
 modification follow.
@@ -72,7 +60,7 @@ modification follow.
 
   0. Definitions.
 
-  "This License" refers to version 3 of the GNU General Public License.
+  "This License" refers to version 3 of the GNU Affero General Public License.
 
   "Copyright" also means copyright-like laws that apply to other kinds of
 works, such as semiconductor masks.
@@ -549,35 +537,45 @@ to collect a royalty for further conveying from those to whom you convey
 the Program, the only way you could satisfy both those terms and this
 License would be to refrain entirely from conveying the Program.
 
-  13. Use with the GNU Affero General Public License.
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
 
   Notwithstanding any other provision of this License, you have
 permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
+under version 3 of the GNU General Public License into a single
 combined work, and to convey the resulting work.  The terms of this
 License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
 
   14. Revised Versions of this License.
 
   The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
 
   Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU General
+Program specifies that a certain numbered version of the GNU Affero General
 Public License "or any later version" applies to it, you have the
 option of following the terms and conditions either of that numbered
 version or of any later version published by the Free Software
 Foundation.  If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
+GNU Affero General Public License, you may choose any version ever published
 by the Free Software Foundation.
 
   If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
+versions of the GNU Affero General Public License can be used, that proxy's
 public statement of acceptance of a version permanently authorizes you
 to choose that version for the Program.
 
@@ -635,40 +633,29 @@ the "copyright" line and a pointer to where the full notice is found.
     Copyright (C) <year>  <name of author>
 
     This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
+    it under the terms of the GNU Affero General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
+    GNU Affero General Public License for more details.
 
-    You should have received a copy of the GNU General Public License
+    You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
 
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
+For more information on this, and how to apply and follow the GNU AGPL, see
 <https://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.

MANIFEST.in

@@ -1 +1 @@
-include *requirements.txt LICENSE chainqueue/db/migrations/default/* chainqueue/db/migrations/default/versions/* chainqueue/db/migrations/default/versions/src/* chainqueue/data/config/*
+include *requirements.txt LICENSE WAIVER WAIVER.asc CHANGELOG chainqueue/db/migrations/default/* chainqueue/db/migrations/default/versions/* chainqueue/db/migrations/default/versions/src/* chainqueue/data/config/*

WAIVER

@@ -0,0 +1,17 @@
+# Copyright waiver for the python package "chainqueue"
+
+I dedicate any and all copyright interest in this software to the
+public domain. I make this dedication for the benefit of the public at
+large and to the detriment of my heirs and successors. I intend this
+dedication to be an overt act of relinquishment in perpetuity of all
+present and future rights to this software under copyright law.
+
+To the best of my knowledge and belief, my contributions are either
+originally authored by me or are derived from prior works which I have
+verified are also in the public domain and are not subject to claims
+of copyright by other parties.
+
+To the best of my knowledge and belief, no individual, business,
+organization, government, or other entity has any copyright interest
+in my contributions, and I affirm that I will not make contributions
+that are otherwise encumbered.

WAIVER.asc

@@ -0,0 +1,29 @@
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chainqueue/__init__.py

@@ -0,0 +1,3 @@
+from .state import Status
+from .entry import QueueEntry
+from .store import Store

chainqueue/adapters/base.py

@@ -1,117 +0,0 @@
-# standard imports
-import datetime
-
-# local imports
-from chainqueue.enum import StatusBits
-
-
-class Adapter:
-    """Base class defining interface to be implemented by chainqueue adapters.
-
-    The chainqueue adapter collects the following actions:
-
-    - add: add a transaction to the queue
-    - upcoming: get queued transactions ready to be sent to network
-    - dispatch: send a queued transaction to the network
-    - translate: decode details of a transaction
-    - create_session, release_session: session management to control queue state integrity
-
-    :param backend: Chainqueue backend
-    :type backend: TODO - abstract backend class. Must implement get, create_session, release_session
-    :param pending_retry_threshold: seconds delay before retrying a transaction stalled in the newtork
-    :type pending_retry_threshold: int
-    :param error_retry_threshold: seconds delay before retrying a transaction that incurred a recoverable error state
-    :type error_retry_threshold: int
-    """
-
-    def __init__(self, backend, pending_retry_threshold=0, error_retry_threshold=0):
-        self.backend = backend
-        self.pending_retry_threshold = datetime.timedelta(pending_retry_threshold)
-        self.error_retry_threshold = datetime.timedelta(error_retry_threshold)
-
-
-    def add(self, bytecode, chain_spec, session=None):
-        """Add a transaction to the queue.
-
-        :param bytecode: Transaction wire format bytecode, in hex
-        :type bytecode: str
-        :param chain_spec: Chain spec to use for transaction decode
-        :type chain_spec: chainlib.chain.ChainSpec
-        :param session: Backend state integrity session
-        :type session: varies
-        """
-        raise NotImplementedError()
-
-
-    def translate(self, bytecode, chain_spec):
-        """Decode details of a transaction.
-
-        :param bytecode: Transaction wire format bytecode, in hex
-        :type bytecode: str
-        :param chain_spec: Chain spec to use for transaction decode
-        :type chain_spec: chainlib.chain.ChainSpec
-        """
-        raise NotImplementedError()
-
-
-    def get(self, tx_hash, chain_spec, session=None):
-        """Retrieve serialized transaction represented by the given transaction hash.
-
-        :param chain_spec: Chain spec to use for transaction decode
-        :type chain_spec: chainlib.chain.ChainSpec
-        :param tx_hash: Transaction hash, in hex
-        :type tx_hash: str
-        :param session: Backend state integrity session
-        :type session: varies
-        """
-        raise NotImplementedError()
-
-
-    def dispatch(self, chain_spec, rpc, tx_hash, signed_tx, session=None):
-        """Send a queued transaction to the network.
-
-        :param chain_spec: Chain spec to use to identify the transaction network
-        :type chain_spec: chainlib.chain.ChainSpec
-        :param rpc: RPC connection to use for transaction send
-        :type rpc: chainlib.connection.RPCConnection
-        :param tx_hash: Transaction hash (checksum of transaction), in hex
-        :type tx_hash: str
-        :param signed_tx: Transaction wire format bytecode, in hex
-        :type signed_tx: str
-        :param session: Backend state integrity session
-        :type session: varies
-        """
-        raise NotImplementedError()
-
-
-    def upcoming(self, chain_spec, session=None):
-        """Get queued transactions ready to be sent to the network.
-
-        The transactions will be a combination of newly submitted transactions, previously sent but stalled transactions, and transactions that could temporarily not be submitted.
-
-        :param chain_spec: Chain spec to use to identify the transaction network
-        :type chain_spec: chainlib.chain.ChainSpec
-        :param session: Backend state integrity session
-        :type session: varies
-        """
-        raise NotImplementedError()
-
-
-    def create_session(self, session=None):
-        """Create a session context to guarantee atomic state change in backend.
-
-        :param session: If specified, session will be used instead of creating a new one
-        :type session: varies
-        """
-        return self.backend.create_session(session)
-
-
-    def release_session(self, session=None):
-        """Release a session context created by create_session.
-
-        If session parameter is defined, final session destruction will be deferred to the initial provider of the session. In other words; if create_session was called with a session, release_session should symmetrically be called with the same session.
-
-        :param session: Session context.
-        :type session: varies
-        """
-        return self.backend.release_session(session)

chainqueue/cache/__init__.py

@@ -0,0 +1 @@
+from .base import *

chainqueue/cache/base.py

@@ -0,0 +1,141 @@
+# standard imports
+import enum
+import logging
+
+logg = logging.getLogger(__name__)
+
+
+class NoopNormalizer:
+
+    def __init__(self):
+        self.address = self.noop
+        self.hash = self.noop
+        self.value = self.noop
+
+
+    def noop(self, v):
+        return v
+
+noop_normalizer = NoopNormalizer()
+
+
+class CacheTx:
+
+    def __init__(self, chain_spec, normalizer=noop_normalizer):
+        self.normalizer = normalizer
+        self.sender = None
+        self.recipient = None
+        self.nonce = None
+        self.value = None
+
+        self.hash = None
+        self.block_number = None
+        self.tx_index = None
+        self.timestamp = None
+
+        self.src = None
+        self.chain_spec = chain_spec
+
+
+    def confirm(self, block_number, tx_index, timestamp):
+        self.block_number = block_number
+        self.tx_index = tx_index
+        self.timestamp = timestamp
+
+
+    def init(self, tx_hash, nonce, sender, recipient, value):
+        self.hash = self.normalizer.hash(tx_hash)
+        self.sender = self.normalizer.address(sender)
+        self.recipient = self.normalizer.address(recipient)
+        self.nonce = nonce
+        self.value = self.normalizer.value(value)
+
+
+    def deserialize(self, signed_tx):
+        raise NotImplementedError()
+
+
+    def set(self, k, v):
+        k = 'v_' + k
+        setattr(self, k, v)
+
+
+    def __str__(self):
+        return '{}: {} ({}) -> {} = {}'.format(self.hash, self.sender, self.nonce, self.recipient, self.value)
+
+
+
+class CacheTokenTx(CacheTx):
+
+    def __init__(self, chain_spec, normalizer=noop_normalizer):
+        super(CacheTokenTx, self).__init__(chain_spec, normalizer=normalizer)
+        self.v_src_token = None
+        self.v_src_value = None
+        self.v_dst_token = None
+        self.v_dst_value = None
+
+
+class CacheSort(enum.Enum):
+    DATE = 1
+    NONCE = 2
+
+
+class CacheFilter:
+
+    def __init__(self, normalizer=noop_normalizer, nonce=None, before=None, after=None, sort=CacheSort.DATE, reverse=False):
+        self.normalizer = normalizer
+        self.senders = None
+        self.recipients = None
+        self.nonce = nonce
+        self.before = before
+        self.after = after
+        self.sort = sort
+        self.reverse = reverse
+
+
+    def add_senders(self, senders):
+        if self.senders == None:
+            self.senders = []
+        if isinstance(senders, str):
+            senders = [senders]
+        for sender in senders:
+            if self.normalizer != None:
+                sender = self.normalizer.address(sender)
+            self.senders.append(sender)
+
+
+    def add_recipients(self, recipients):
+        if self.recipients == None:
+            self.recipients = []
+        if isinstance(recipients, str):
+            recipients = [recipients]
+        for recipient in recipients:
+            if self.normalizer != None:
+                recipient = self.normalizer.address(recipient)
+            self.recipients.append(recipient)
+
+
+class Cache: 
+
+    def put(self, chain_spec, cache_tx):
+        raise NotImplementedError()
+
+
+    def get(self, chain_spec, tx_hash):
+        raise NotImplementedError()
+
+
+    def by_nonce(self, cache_filter):
+        raise NotImplementedError()
+
+
+    def by_date(self, cache_filter=None):
+        raise NotImplementedError()
+
+
+    def count(self, cache_filter=None):
+        raise NotImplementedError()
+
+
+    def set_block(self, block, tx):
+        raise NotImplementedError()

chainqueue/cache/fs.py

@@ -0,0 +1,10 @@
+# local imports
+from .base import Cache
+
+
+class FsCache(Cache):
+
+    def __init__(self, path):
+        self.path = path
+
+

chainqueue/cli/arg.py

@@ -0,0 +1,8 @@
+def apply_flag(flag):
+    flag.add('queue')
+    return flag
+
+
+def apply_arg(arg): 
+    arg.add_long('tx-digest-size', 'queue', type=int, help='Size of transaction hash in bytes')
+    return arg

chainqueue/cli/config.py

@@ -0,0 +1,10 @@
+def process_config(config, args, flags):
+        args_override = {}
+
+        args_override['QUEUE_BACKEND'] = getattr(args, 'backend')
+        args_override['TX_DIGEST_SIZE'] = getattr(args, 'tx_digest_size')
+        args_override['QUEUE_STATE_PATH'] = getattr(args, 'state_dir')
+
+        config.dict_override(args_override, 'local cli args')
+
+        return config

chainqueue/data/config/config.ini

@@ -1,9 +1,8 @@
-[database]
-name =
-engine =
-driver =
-host =
-port =
-user =
-password =
-debug = 0
+[queue]
+backend = mem
+state_path =
+index_path =
+counter_path =
+
+[tx]
+digest_size = 32

chainqueue/entry.py

@@ -0,0 +1,151 @@
+# standard imports
+import logging
+
+# external imports
+from hexathon import (
+        add_0x,
+        strip_0x,
+        uniform,
+        )
+
+# local imports
+from chainqueue.cache import CacheTx
+
+logg = logging.getLogger(__name__)
+
+
+def normalize_hex(k):
+    k = strip_0x(k)
+    return uniform(k)
+
+
+class QueueEntry:
+
+    def __init__(self, store, tx_hash=None, cache_adapter=CacheTx):
+        self.store = store
+        #self.tx_hash = normalize_hex(tx_hash)
+        self.tx_hash = tx_hash
+        self.signed_tx = None
+        self.seq = None
+        self.k = None
+        self.synced = False
+        self.cache_adapter = cache_adapter
+
+
+    def serialize(self):
+        return self.signed_tx
+
+
+    def create(self, signed_tx):
+        signed_tx = normalize_hex(signed_tx)
+        (s, tx_hash) = self.store.put(signed_tx, cache_adapter=self.cache_adapter)
+        self.k = s
+        self.synced = True
+        return tx_hash
+
+
+    def local_state(self):
+        state = self.store.state(self.k)
+        state_str = self.store.name(state)
+        return (state, state_str,)
+
+
+    def load(self):
+        (self.k, self.signed_tx) = self.store.get(self.tx_hash)
+        self.synced = True
+
+
+    def __match_state(self, state):
+        return bool(self.store.state(self.k) & state)
+
+    
+    def waitforfunds(self):
+        if self.__match_state(self.store.INSUFFICIENT_FUNDS):
+            return
+        self.store.move(self.k, self.store.INSUFFICIENT_FUNDS)
+
+
+    def fubar(self):
+        if self.__match_state(self.store.UNKNOWN_ERROR):
+            return
+        self.store.set(self.k, self.store.UNKNOWN_ERROR)
+
+
+    def reject(self):
+        if self.__match_state(self.store.NODE_ERROR):
+            return
+        self.store.set(self.k, self.store.NODE_ERROR)
+
+
+    def override(self, manual=False):
+        if manual:
+            self.store.set(self.k, self.store.OBSOLETE | self.store.MANUAL)
+        else:
+            self.store.set(self.k, self.store.OBSOLETE)
+
+
+    def manual(self):
+        self.store.set(self.k, self.store.MANUAL)
+
+
+    def retry(self):
+        if self.__match_state(self.store.QUEUED):
+            return
+        self.store.change(self.k, self.store.QUEUED, self.store.INSUFFICIENT_FUNDS)
+
+
+    def readysend(self):
+        if self.__match_state(self.store.QUEUED):
+            return
+        self.store.change(self.k, self.store.QUEUED, self.store.INSUFFICIENT_FUNDS)
+
+    
+    def sent(self):
+        if self.__match_state(self.store.IN_NETWORK):
+            return
+        self.store.change(self.k, self.store.IN_NETWORK, self.store.RESERVED | self.store.DEFERRED | self.store.QUEUED | self.store.LOCAL_ERROR | self.store.NODE_ERROR)
+
+
+    def sendfail(self):
+        if self.__match_state(self.store.NODE_ERROR):
+            return
+        self.store.change(self.k, self.store.LOCAL_ERROR | self.store.DEFERRED, self.store.RESERVED | self.store.QUEUED | self.store.INSUFFICIENT_FUNDS)
+
+
+    def reserve(self):
+        if self.__match_state(self.store.RESERVED):
+            return
+        self.store.change(self.k, self.store.RESERVED, self.store.QUEUED) 
+
+
+    def fail(self, block, tx):
+        if self.__match_state(self.store.NETWORK_ERROR):
+            return
+        v = self.store.state(self.k)
+        self.store.change(self.k, v | self.store.NETWORK_ERROR, self.store.QUEUED)
+        if self.store.cache:
+            self.store.cache.set_block(self.tx_hash, block, tx)
+
+
+    def cancel(self, confirmed=False):
+        if confirmed:
+            self.store.change(self.k, self.store.OBSOLETE | self.store.FINAL, self.store.RESERVED | self.store.QUEUED)
+        else:
+            self.store.change(self.k, self.store.OBSOLETE, self.store.RESERVED | self.store.QUEUED)
+
+
+    def succeed(self, block, tx):
+        self.store.set(self.k, self.store.FINAL)
+        if self.store.cache:
+            self.store.cache.set_block(self.tx_hash, block, tx)
+
+
+    def test(self, state):
+        return self.__match_state(state)
+
+
+    def __str__(self):
+        v = self.store.get(self.tx_hash)
+        n = self.store.state(v[0])
+        s = self.store.name(n)
+        return '{}: {} ({})'.format(self.k, s, n)

chainqueue/enum.py

@@ -42,7 +42,6 @@ class StatusEnum(enum.IntEnum):
     """
     PENDING = 0
     """Transaction has been added but no processing has been performed"""
-
     SENDFAIL = StatusBits.DEFERRED | StatusBits.LOCAL_ERROR
     """Temporary error occurred when sending transaction to node"""
     RETRY = StatusBits.QUEUED | StatusBits.DEFERRED 

chainqueue/error.py

@@ -24,8 +24,7 @@ class CacheIntegrityError(ChainQueueException):
     pass
 
 
-class BackendIntegrityError(ChainQueueException):
-    """Raised when queue backend has invalid state
+class DuplicateTxError(ChainQueueException):
+    """Backend already knows transaction
     """
     pass
-

chainqueue/runnable/list.py

@@ -4,15 +4,19 @@
 import os
 import logging
 import sys
+import importlib
 
 # external imports
 from hexathon import add_0x
 import chainlib.cli
 from chainlib.chain import ChainSpec
-from crypto_dev_signer.eth.signer import ReferenceSigner as EIP155Signer
 
 # local imports
-from chainqueue.cli import Outputter
+import chainqueue.cli
+#from chainqueue.cli.output import Outputter
+from chainqueue.settings import ChainqueueSettings
+from chainqueue.store import Store
+from chainqueue.entry import QueueEntry
 
 
 logging.basicConfig(level=logging.WARNING)
@@ -21,30 +25,31 @@ logg = logging.getLogger()
 script_dir = os.path.dirname(os.path.realpath(__file__)) 
 config_dir = os.path.join(script_dir, '..', 'data', 'config')
 
-arg_flags = chainlib.cli.argflag_std_base | chainlib.cli.Flag.CHAIN_SPEC
+arg_flags = chainlib.cli.argflag_std_base | chainlib.cli.Flag.CHAIN_SPEC | chainlib.cli.Flag.UNSAFE
 argparser = chainlib.cli.ArgumentParser(arg_flags)
-argparser.add_argument('--backend', type=str, default='sql', help='Backend to use (currently only "sql")')
-argparser.add_argument('--start', type=str, help='Oldest transaction hash to include in results')
-argparser.add_argument('--end', type=str, help='Newest transaction hash to include in results')
+argparser.add_argument('--backend', type=str, default='sql', help='Backend to use')
 argparser.add_argument('--error', action='store_true', help='Only show transactions which have error state')
-argparser.add_argument('--pending', action='store_true', help='Omit finalized transactions')
-argparser.add_argument('--status-mask', type=int, dest='status_mask', help='Manually specify status bitmask value to match (overrides --error and --pending)')
-argparser.add_argument('--summary', action='store_true', help='output summary for each status category')
-argparser.add_argument('-o', '--column', dest='column', action='append', type=str, help='add a column to display')
-argparser.add_positional('address', type=str, help='Ethereum address of recipient')
+argparser.add_argument('--no-final', action='store_true', dest='no_final', help='Omit finalized transactions')
+argparser.add_argument('--status-mask', type=str, dest='status_mask', action='append', default=[], help='Manually specify status bitmask value to match (overrides --error and --pending)')
+argparser.add_argument('--exact', action='store_true', help='Match status exact')
+argparser.add_argument('--include-pending', action='store_true', dest='include_pending', help='Include transactions in unprocessed state (pending)')
+argparser.add_argument('--renderer', type=str, default=[], action='append', help='Transaction renderer for output')
+argparser.add_positional('address', required=False, type=str, help='Ethereum address of recipient')
 args = argparser.parse_args()
 extra_args = {
     'address': None,
     'backend': None,
-    'start': None,
-    'end': None,
+    'state_dir': None,
+    'exact': None,
     'error': None,
-    'pending': None,
+    'include_pending': '_PENDING',
     'status_mask': None,
-    'column': None,
-    'summary': None,
+    'no_final': None,
+    'renderer': None,
         }
 config = chainlib.cli.Config.from_args(args, arg_flags, extra_args=extra_args, base_config_dir=config_dir)
+config = chainqueue.cli.config.process_config(config, args, 0)
+logg.debug('config loaded:\n{}'.format(config))
 
 chain_spec = ChainSpec.from_chain_str(config.get('CHAIN_SPEC'))
 
@@ -58,36 +63,40 @@ if status_mask == None:
 
 tx_getter = None
 tx_lister = None
-session_method = None
-if config.get('_BACKEND') == 'sql':
-    from chainqueue.sql.query import get_account_tx as tx_lister
-    from chainqueue.sql.query import get_tx_cache as tx_getter
-    from chainqueue.runnable.sql import setup_backend
-    from chainqueue.db.models.base import SessionBase
-    setup_backend(config, debug=config.true('DATABASE_DEBUG'))
-    session_method = SessionBase.create_session
-else:
-    raise NotImplementedError('backend {} not implemented'.format(config.get('_BACKEND')))
+#output_cols = config.get('_COLUMN')
 
-output_cols = config.get('_COLUMN')
+renderers_mods = []
+for renderer in config.get('_RENDERER'):
+    m = importlib.import_module(renderer)
+    renderers_mods.append(m)
+    logg.info('using renderer module {}'.format(renderer))
+
+settings = ChainqueueSettings()
+settings.process(config)
+logg.debug('settings:\n{}'.format(settings))
 
 
 def main():
-    since = config.get('_START', None)
-    if since != None:
-        since = add_0x(since)
-    until = config.get('_END', None)
-    if until != None:
-        until = add_0x(until)
-    txs = tx_lister(chain_spec, config.get('_ADDRESS'), since=since, until=until, status=status_mask, not_status=not_status_mask)
-    outputter = Outputter(chain_spec, sys.stdout, tx_getter, session_method=session_method, decode_status=config.true('_RAW'), cols=output_cols)
-    if config.get('_SUMMARY'):
-        for k in txs.keys():
-            outputter.add(k)
-        outputter.decode_summary()
-    else:
-        for k in txs.keys():
-            outputter.decode_single(k)
+#    since = config.get('_START', None)
+#    if since != None:
+#        since = add_0x(since)
+#    until = config.get('_END', None)
+#    if until != None:
+#        until = add_0x(until)
+#    txs = tx_lister(chain_spec, config.get('_ADDRESS'), since=since, until=until, status=status_mask, not_status=not_status_mask)
+    txs = settings.get('QUEUE_STORE').by_state(state=settings.get('QUEUE_STATUS_FILTER'), strict=config.get('_EXACT'), include_pending=config.get('_PENDING'))
+    
+    for i, tx_hash in enumerate(txs):
+        entry = QueueEntry(settings.get('QUEUE_STORE'), tx_hash)
+        entry.load()
+        v = None
+        if len(renderers_mods) == 0:
+            v = str(entry)
+        else:
+            for m in renderers_mods:
+                v = m.apply(i, settings, v, settings.get('CHAIN_SPEC'), entry)
+        print(v)
+
 
 if __name__ == '__main__':
     main()

chainqueue/runnable/sql.py

@@ -1,14 +0,0 @@
-# standard imports
-import logging
-
-# local imports
-from chainqueue.db.models.base import SessionBase
-from chainqueue.db import dsn_from_config
-
-logg = logging.getLogger(__name__)
-
-
-def setup_backend(config, debug=False):
-        dsn = dsn_from_config(config)
-        logg.debug('dsn {}'.format(dsn))
-        SessionBase.connect(dsn, debug=debug)

chainqueue/runnable/state.py

@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# standard imports
+import os
+import logging
+import argparse
+
+# local imports
+from chainqueue.state import Status
+
+argparser = argparse.ArgumentParser()
+argparser.add_argument('-r', '--raw', dest='r', action='store_true', help='Always print pure state element strings')
+argparser.add_argument('state', type=str, help='State to interpret')
+args = argparser.parse_args()
+
+status_interpreter = Status(None, allow_invalid=True)
+
+
+def handle_numeric(v, elements=False):
+    if elements:
+        if not status_interpreter.is_pure(v):
+            return status_interpreter.elements(v)
+    return status_interpreter.name(v)
+
+
+def handle_string(v):
+    try:
+        return status_interpreter.from_name(v)
+    except AttributeError:
+        return status_interpreter.from_elements(v)
+
+
+def main():
+    v = None
+    numeric = False
+    try:
+        v = int(args.state)
+        numeric = True
+    except:
+        v = args.state
+      
+    r = None
+    if numeric:
+        r = handle_numeric(v, elements=args.r)
+    else:
+        r = handle_string(v)
+
+    print(r)
+
+if __name__ == '__main__':
+    main()

chainqueue/settings.py

@@ -0,0 +1,99 @@
+# standard imports
+import os
+import logging
+
+# external imports
+from chainlib.settings import ChainSettings
+from chainqueue.state import Status
+from chainqueue.store import Store
+
+logg = logging.getLogger(__name__)
+
+
+def process_queue_tx(settings, config):
+    settings.set('TX_DIGEST_SIZE', config.get('TX_DIGEST_SIZE'))
+    return settings
+
+
+def process_queue_store(settings, config):
+    status = Status(settings.get('QUEUE_STORE_FACTORY'), allow_invalid=True)
+    settings.set('QUEUE_STATE_STORE', status)
+    store = Store(
+        settings.get('CHAIN_SPEC'),
+        settings.get('QUEUE_STATE_STORE'),
+        settings.get('QUEUE_INDEX_STORE'),
+        settings.get('QUEUE_COUNTER_STORE'),
+        sync=True,
+        )
+    settings.set('QUEUE_STORE', store)
+    return settings
+
+
+def process_queue_paths(settings, config):
+    index_dir = config.get('QUEUE_INDEX_PATH')
+    if index_dir == None:
+        index_dir = os.path.join(config.get('STATE_PATH'), 'tx')
+
+    counter_dir = config.get('QUEUE_COUNTER_PATH')
+    if counter_dir == None:
+        counter_dir = os.path.join(config.get('STATE_PATH'))
+
+    settings.set('QUEUE_STATE_PATH', config.get('STATE_PATH'))
+    settings.set('QUEUE_INDEX_PATH', index_dir)
+    settings.set('QUEUE_COUNTER_PATH', counter_dir)
+    return settings
+
+
+def process_queue_backend_fs(settings, config):
+    from chainqueue.store.fs import IndexStore
+    from chainqueue.store.fs import CounterStore
+    from shep.store.file import SimpleFileStoreFactory
+    index_store = IndexStore(settings.o['QUEUE_INDEX_PATH'], digest_bytes=int(settings.o['TX_DIGEST_SIZE']))
+    counter_store = CounterStore(settings.o['QUEUE_COUNTER_PATH'])
+    factory = SimpleFileStoreFactory(settings.o['QUEUE_STATE_PATH'], use_lock=True).add
+
+    settings.set('QUEUE_INDEX_STORE', index_store)
+    settings.set('QUEUE_COUNTER_STORE', counter_store)
+    settings.set('QUEUE_STORE_FACTORY', factory)
+
+    return settings
+
+
+def process_queue_status_filter(settings, config):
+    states = 0
+    store = settings.get('QUEUE_STATE_STORE')
+    if len(config.get('_STATUS_MASK')) == 0:
+        for v in store.all(numeric=True):
+            states |= v
+        logg.debug('state store {}'.format(states))
+    else:
+        for v in config.get('_STATUS_MASK'):
+            try:
+                states |= int(v)
+                continue
+            except ValueError:
+                pass
+            
+            state = store.from_name(v)
+            logg.debug('resolved state argument {} to numeric state {}'.format(v, state))
+            states |= state
+
+    settings.set('QUEUE_STATUS_FILTER', states)
+    return settings
+
+
+def process_queue(settings, config):
+    settings = process_queue_tx(settings, config)
+    settings = process_queue_paths(settings, config)
+    if config.get('QUEUE_BACKEND') == 'fs':
+        settings = process_queue_backend_fs(settings, config)
+    settings = process_queue_backend(settings, config)
+    settings = process_queue_store(settings, config)
+    settings = process_queue_status_filter(settings, config)
+    return settings
+
+
+def process_settings(settings, config):
+    super(ChainqueueSettings, settings).process(config)
+    settings = settings.process_queue(settings, config) 
+    return settings

chainqueue/sql/query.py

@@ -462,6 +462,70 @@ def get_account_tx(chain_spec, address, as_sender=True, as_recipient=True, count
 
     return txs
 
+def get_latest_txs(chain_spec,  count=10, since=None, until=None, status=None, not_status=None, status_target=None, session=None):
+    """Returns the lastest local queue transactions
+
+    The since parameter effect depends on its type. Results are returned inclusive of the given parameter condition.
+
+    :param chain_spec: Chain spec for transaction network
+    :type chain_spec: chainlib.chain.ChainSpec
+    :param status: Only include transactions where the given status bits are set
+    :type status: chainqueue.enum.StatusEnum
+    :param not_status: Only include transactions where the given status bits are not set
+    :type not_status: chainqueue.enum.StatusEnum
+    :param status_target: Only include transaction where the status argument is exact match
+    :type status_target: chainqueue.enum.StatusEnum
+    :param session: Backend state integrity session
+    :type session: varies
+    :raises ValueError: If address is set to be neither sender nor recipient
+    :returns: Transactions 
+    :rtype: dict, with transaction hash as key, signed raw transaction as value
+    """
+    txs = {}
+
+    session = SessionBase.bind_session(session)
+
+    try:
+        filter_offset = sql_range_filter(session, criteria=since)
+        filter_limit = sql_range_filter(session, criteria=until)
+    except NotLocalTxError as e:
+        logg.error('query build failed: {}'.format(e))
+        return {}
+
+    q = session.query(Otx)
+    q = q.join(TxCache)
+
+    if filter_offset != None:
+        if filter_offset[0] == 'id':
+            q = q.filter(Otx.id>=filter_offset[1])
+        elif filter_offset[0] == 'date':
+            q = q.filter(Otx.date_created>=filter_offset[1])
+
+    if filter_limit != None:
+        if filter_limit[0] == 'id':
+            q = q.filter(Otx.id<=filter_limit[1])
+        elif filter_limit[0] == 'date':
+            q = q.filter(Otx.date_created<=filter_limit[1])
+
+    if status != None:
+        if status_target == None:
+            status_target = status
+        q = q.filter(Otx.status.op('&')(status)==status_target)
+    
+    if not_status != None:
+        q = q.filter(Otx.status.op('&')(not_status)==0)
+
+    q = q.order_by(Otx.date_created.desc(), Otx.nonce.desc()).limit(count)
+    results = q.all()
+    for r in results:
+        if txs.get(r.tx_hash) != None:
+            logg.debug('tx {} already recorded'.format(r.tx_hash))
+            continue
+        txs[r.tx_hash] = r.signed_tx
+
+    SessionBase.release_session(session)
+
+    return txs
 
 def count_tx(chain_spec, sender=None, status=None, status_target=None, session=None):
     """Count transaction records matching the given criteria.

chainqueue/state.py

@@ -0,0 +1,140 @@
+# standard imports
+import logging
+
+# external imports
+import shep.persist
+
+logg = logging.getLogger(__name__)
+
+
+class Verify:
+
+    def verify(self, state_store, key, from_state, to_state):
+        to_state_name = state_store.name(to_state)
+        m = None
+        try:  
+            m = getattr(self, to_state_name)
+        except AttributeError:
+            return None
+
+        r = m(state_store, from_state)
+        if r != None:
+            from_state_name = state_store.name(from_state)
+            r = '{} -> {}: {}'.format(from_state_name, to_state_name, r)
+
+        return r
+
+
+    def INSUFFICIENT_FUNDS(self, state_store, from_state):
+        if from_state & state_store.FINAL:
+            return 'already finalized'
+        if from_state & state_store.IN_NETWORK:
+            return 'already in network'
+
+
+    def UNKNOWN_ERROR(self, state_store, from_state):
+        if from_state & state_store.FINAL:
+            return 'already finalized'
+        if from_state & state_store.RESERVED:
+            return 'not reserved'
+        if from_state & state_store.mask_error:
+            return 'already in error state'
+
+
+    def NODE_ERROR(self, state_store, from_state):
+        if from_state & state_store.FINAL:
+            return 'already finalized'
+        if from_state & state_store.IN_NETWORK:
+            return 'already in network'
+        if not from_state & state_store.RESERVED:
+            return 'not reserved'
+        if from_state & state_store.mask_error:
+            return 'already in error state'
+
+
+    def NETWORK_ERROR(self, state_store, from_state):
+        if from_state & state_store.FINAL:
+            return 'already finalized'
+        if from_state & state_store.IN_NETWORK:
+            return 'already in network'
+
+
+    def OBSOLETE(self, state_store, from_state):
+        if from_state & state_store.FINAL:
+            return 'already finalized'
+        if from_state & state_store.IN_NETWORK:
+            return 'already in network'
+        if from_state & state_store.OBSOLETE:
+            return 'already obsolete'
+
+    
+    def MANUAL(self, state_store, from_state):
+        if from_state & state_store.FINAL:
+            return 'already finalized'
+
+
+    def QUEUED(self, state_store, from_state):
+        if from_state & state_store.FINAL:
+            return 'already finalized'
+        if from_state & state_store.IN_NETWORK:
+            if not from_state & state_store.mask_error:
+                return 'not in error state'
+        elif from_state & state_store.mask_error:
+            return 'no first send on error state'
+          
+
+    def SENDFAIL(self, state_store, from_state):
+        return self.NODE_ERROR(state_store, from_state)
+
+
+    def FINAL(self, state_store, from_state):
+        if from_state & state_store.FINAL:
+            return 'already finalized'
+
+
+    def _MINEFAIL(self, state_store, from_state):
+        return self.NETWORK_ERROR(state_store, from_state)
+
+
+    def _CANCEL(self, state_store, from_state):
+        if from_state:
+            if from_state & state_store.FINAL:
+                return 'already finalized'
+            if not from_state & (state_store.OBSOLETE | state_store.IN_NETWORK):
+                return 'can only cancel state having OBSOLETE and/or IN_NETWORK'
+
+
+class Status(shep.persist.PersistedState):
+
+    bits = 12
+   
+    def __init__(self, store_factory, allow_invalid=False, event_callback=None):
+        verify = Verify().verify
+        self.set_default_state('PENDING')
+        super(Status, self).__init__(store_factory, self.bits, verifier=verify, check_alias=not allow_invalid, event_callback=event_callback)
+        self.add('QUEUED')
+        self.add('RESERVED')
+        self.add('IN_NETWORK')
+        self.add('DEFERRED')
+        self.add('INSUFFICIENT_FUNDS')
+        self.add('LOCAL_ERROR')
+        self.add('NODE_ERROR')
+        self.add('NETWORK_ERROR')
+        self.add('UNKNOWN_ERROR')
+        self.add('FINAL')
+        self.add('OBSOLETE')
+        self.add('MANUAL')
+
+        self.alias('SENDFAIL', self.DEFERRED | self.LOCAL_ERROR)
+        self.alias('RETRY', self.DEFERRED | self.QUEUED)
+        self.alias('OBSOLETED', self.OBSOLETE | self.IN_NETWORK)
+        self.alias('FUBAR', self.FINAL | self.UNKNOWN_ERROR)
+        self.alias('CANCELLED', self.IN_NETWORK | self.FINAL | self.OBSOLETE)
+        self.alias('OVERRIDDEN', self.FINAL | self.OBSOLETE | self.MANUAL)
+        self.alias('REJECTED', self.NODE_ERROR | self.FINAL)
+        self.alias('REVERTED', self.IN_NETWORK | self.FINAL | self.NETWORK_ERROR)
+        self.alias('SUCCESS', self.IN_NETWORK | self.FINAL)
+        self.alias('_MINEFAIL', self.FINAL | self.NETWORK_ERROR)
+        self.alias('_CANCEL', self.FINAL | self.OBSOLETE)
+
+        self.mask_error = self.LOCAL_ERROR | self.NODE_ERROR | self.NETWORK_ERROR | self.UNKNOWN_ERROR

chainqueue/store/__init__.py

@@ -0,0 +1,5 @@
+from .base import (
+        to_key,
+        from_key,
+        Store,
+        )

chainqueue/store/base.py

@@ -0,0 +1,218 @@
+# standard imports
+import re
+import datetime
+import logging
+import time
+
+# local imports
+from chainqueue.cache import CacheTx
+from chainqueue.entry import QueueEntry
+from chainqueue.error import NotLocalTxError
+from chainqueue.enum import (
+        StatusBits,
+        all_errors,
+        )
+
+logg = logging.getLogger(__name__)
+
+
+def to_key(t, n, k):
+    return '{}_{}_{}'.format(t, n, k)
+
+
+def from_key(k):
+    (ts_str, seq_str, tx_hash) = k.split('_')
+    return (float(ts_str), int(seq_str), tx_hash, )
+
+all_local_errors = all_errors() - StatusBits.NETWORK_ERROR
+
+re_u = r'^[^_][_A-Z]+$'
+class Store:
+
+    def __init__(self, chain_spec, state_store, index_store, counter, cache=None, sync=True):
+        self.chain_spec = chain_spec
+        self.cache = cache
+        self.state_store = state_store
+        self.index_store = index_store
+        self.counter = counter
+        for s in dir(self.state_store):
+            if not re.match(re_u, s):
+                continue
+            v = self.state_store.from_name(s)
+            setattr(self, s, v)
+        for v in [
+                'state',
+                'change',
+                'set',
+                'unset',
+                'name',
+                'modified',
+                'purge',
+                ]:
+            setattr(self, v, getattr(self.state_store, v))
+
+        if not sync:
+            return
+
+        sync_err = None
+        try:
+            self.state_store.sync()
+        except Exception as e:
+            sync_err = e
+
+        if sync_err != None:
+            raise FileNotFoundError(sync_err)
+
+
+    def put(self, v, cache_adapter=CacheTx):
+        tx = cache_adapter(self.chain_spec)
+        tx.deserialize(v)
+        k = tx.hash
+        n = self.counter.next()
+        t = datetime.datetime.now().timestamp()
+        s = to_key(t, n, k)
+        self.index_store.put(k, s)
+        self.state_store.put(s, v)
+        if self.cache != None:
+            self.cache.put(self.chain_spec, tx) 
+        return (s, k,)
+
+
+    def get(self, k):
+        v = None
+        s = self.index_store.get(k)
+        err = None
+        try:
+            v = self.state_store.get(s)
+        except FileNotFoundError as e:
+            err = e
+        if v == None:
+            raise NotLocalTxError('could not find tx {}: {}'.format(k, err))
+        return (s, v,)
+
+
+    def by_state(self, state=0, not_state=0, include_pending=False, limit=4096, strict=False, threshold=None):
+        hashes = []
+        i = 0
+  
+        refs_state = []
+        if state > 0:
+            if self.state_store.is_pure(state):
+                refs_state = self.state_store.list(state)
+            elif strict:
+                refs_state = self.state_store.list(state)
+            else:
+                for v in self.state_store.elements(state, numeric=True):
+                    refs_state += self.state_store.list(v)
+                refs_state = list(set(refs_state))
+        if include_pending:
+            refs_state += self.state_store.list(0)
+
+        refs_state.sort()
+
+        for ref in refs_state:
+            v = from_key(ref)
+            hsh = v[2]
+
+            item_state = self.state_store.state(ref)
+
+            if strict:
+                if item_state & state != item_state:
+                    continue
+
+            if item_state & not_state > 0:
+                continue
+
+            item_state_str = self.state_store.name(item_state)
+            logg.info('state {} {} ({})'.format(ref, item_state_str, item_state))
+
+            if threshold != None:
+                v = self.state_store.modified(ref)
+                if v > threshold:
+                    continue
+
+            hashes.append(hsh)
+
+            i += 1
+            if limit > 0 and i == limit:
+                break
+
+        #hashes.sort()
+        return hashes
+
+
+    def upcoming(self, limit=4096):
+        return self.by_state(state=self.QUEUED, limit=limit)
+
+
+    def deferred(self, limit=4096, threshold=None):
+        return self.by_state(state=self.DEFERRED, limit=limit, threshold=threshold)
+
+
+    def failed(self, limit=4096):
+        #return self.by_state(state=all_local_errors, limit=limit)
+        r = []
+        r += self.by_state(state=self.LOCAL_ERROR, limit=limit)
+        r += self.by_state(state=self.NODE_ERROR, limit=limit)
+        r.sort()
+        if len(r) > limit:
+            r = r[:limit]
+        return r
+
+
+    def pending(self, limit=4096):
+        return self.by_state(include_pending=True, limit=limit, strict=True)
+
+
+    def reserve(self, k):
+        entry = QueueEntry(self, k)
+        entry.load()
+        entry.reserve()
+
+
+    def enqueue(self, k):
+        entry = QueueEntry(self, k)
+        entry.load()
+        try:
+            entry.retry()
+        except StateTransitionInvalid:
+            entry.readysend()
+
+
+    def fail(self, k):
+        entry = QueueEntry(self, k)
+        entry.load()
+        logg.debug('fail {}'.format(k))
+        entry.sendfail()
+
+
+    def final(self, k, block, tx, error=False):
+        entry = QueueEntry(self, k)
+        entry.load()
+        if error:
+            entry.fail(block, tx)
+        else:
+            entry.succeed(block, tx)
+
+
+    def send_start(self, k):
+        entry = QueueEntry(self, k)
+        entry.load()
+        entry.reserve()
+        return entry
+
+
+    def send_end(self, k):
+        entry = QueueEntry(self, k)
+        entry.load()
+        entry.sent()
+
+
+    def is_reserved(self, k):
+        entry = QueueEntry(self, k)
+        entry.load()
+        return entry.test(self.RESERVED)
+
+
+    def sync(self):
+        self.state_store.sync()

chainqueue/store/fs.py

@@ -0,0 +1,94 @@
+# standard imports
+import os
+import logging
+
+# external imports
+from leveldir.hex import HexDir
+
+# local imports
+from chainqueue.error import (
+        DuplicateTxError,
+        NotLocalTxError,
+        )
+
+logg = logging.getLogger(__name__)
+
+
+class IndexStore(HexDir):
+
+    def __init__(self, root_path, digest_bytes=32):
+        os.path.join(root_path, 'contents')
+        self.store = HexDir(root_path, digest_bytes)
+
+    
+    def __exists(self, k):
+        existing = None
+        try:
+            existing = self.get(k)
+        except NotLocalTxError:
+            pass
+        return existing != None
+
+
+    def put(self, k, v):
+        kb = bytes.fromhex(k)
+        vb = v.encode('utf-8')
+        if self.__exists(k):
+            raise DuplicateTxError(k)
+        self.store.add(kb, vb)
+
+
+    def get(self, k):
+        fp = self.store.to_filepath(k)
+        f = None
+        err = None
+        try:
+            f = open(fp, 'rb')
+        except FileNotFoundError as e:
+            err = e
+        if err != None:
+            raise NotLocalTxError(err)
+        v = f.read()
+        f.close()
+        return v.decode('utf-8')
+
+
+class CounterStore:
+
+    def __init__(self, root_path):
+        try:
+            os.stat(root_path)
+        except FileNotFoundError:
+            os.makedirs(root_path)
+
+        fp = os.path.join(root_path, '.counter')
+        f = None
+        try:
+            f = open(fp, 'rb+')
+        except FileNotFoundError:
+            logg.debug('counter not found, creating new in {}'.format(fp))
+            f = open(fp, 'wb+')
+            f.write(b'\x00' * 8)
+            f.close()
+            f = open(fp, 'rb+')
+    
+        v = f.read(8)
+        self.count = int.from_bytes(v, byteorder='big')
+        logg.debug('counter starts at {}'.format(self.count))
+    
+        f.seek(0)
+
+        self.f = f
+
+
+    def __del__(self):
+        self.f.close()
+
+
+    def next(self):
+        c = self.count
+        self.count += 1
+        v = self.count.to_bytes(8, 'big')
+        self.f.write(v)
+        self.f.seek(0)
+        return c

requirements.txt

@@ -1,8 +1,5 @@
-pysha3==1.0.2
-hexathon~=0.1.0
-leveldir~=0.1.0
-alembic==1.4.2
-SQLAlchemy==1.3.20
-confini~=0.5.1
-pyxdg~=0.27
-chainlib~=0.0.12
+hexathon~=0.1.7
+leveldir~=0.3.0
+confini~=0.6.1
+chainlib~=0.4.0
+shep~=0.3.0

setup.cfg

@@ -1,41 +1,40 @@
 [metadata]
 name = chainqueue
-version = 0.0.6a3
+version = 0.2.4
 description = Generic blockchain transaction queue control
 author = Louis Holbrook
 author_email = dev@holbrook.no
-url = https://gitlab.com/chaintools/chainqueue
+url = https://git.defalslfy.org/chainqueue,git
 keywords =
-	cic
+	dlt
 	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+)
+	License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
 	Topic :: Internet
 #	Topic :: Blockchain :: EVM
-license = GPL3
+license = OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
 licence_files =
-	LICENSE.txt
+	LICENSE
 
 [options]
-python_requires = >= 3.6
+python_requires = >= 3.7
 include_package_data = True
 packages = 
 	chainqueue
-	chainqueue.db
-	chainqueue.db.models
-	chainqueue.sql
-	chainqueue.adapters
+	chainqueue.cache
 	chainqueue.unittest
+	chainqueue.store
 	chainqueue.runnable
+	chainqueue.cli
+	chainqueue.data
 
 [options.entry_points]
 console_scripts =
 	chainqueue-list = chainqueue.runnable.list:main
+	chainqueue-state = chainqueue.runnable.state:main

setup.py

@@ -12,23 +12,11 @@ while True:
     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
 
-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,

test_requirements.txt

@@ -1 +0,0 @@
-chainlib==0.0.9a10

tests/base_shep.py

@@ -0,0 +1,39 @@
+# standard imports
+import tempfile
+import unittest
+import shutil
+import logging
+
+# external imports
+from shep.store.file import SimpleFileStoreFactory
+from chainlib.chain import ChainSpec
+
+# local imports
+from chainqueue import (
+        Store,
+        Status,
+        )
+
+# test imports
+from tests.common import (
+        MockCounter,
+        MockContentStore,
+        )
+
+logg = logging.getLogger(__name__)
+
+class TestShepBase(unittest.TestCase):
+
+    def setUp(self):
+        self.path = tempfile.mkdtemp()
+        factory = SimpleFileStoreFactory(self.path).add
+        self.state = Status(factory)
+        content_store = MockContentStore()
+        counter = MockCounter()
+        chain_spec = ChainSpec('foo', 'bar', 42, 'baz')
+        self.store = Store(chain_spec, self.state, content_store, counter)
+        logg.debug('using path {}'.format(self.path))
+
+
+    def tearDown(self):
+        shutil.rmtree(self.path)

tests/common.py

@@ -0,0 +1,103 @@
+# standard imports
+import hashlib
+
+# local imports
+from chainqueue.cache import (
+        Cache,
+        CacheTokenTx,
+        )
+
+
+class MockCounter:
+
+    def __init__(self):
+        self.c = 0
+
+
+    def next(self):
+        c = self.c
+        self.c += 1
+        return c
+
+
+class MockTokenCache(Cache):
+
+    def __init__(self):
+        self.db = {}
+        self.last_filter = None
+
+    def put(self, chain_spec, cache_tx):
+        self.db[cache_tx.hash] = cache_tx
+
+
+    def get(self, chain_spec, tx_hash):
+        return self.db[tx_hash]
+
+
+    def by_nonce(self, cache_filter):
+        self.last_filter = cache_filter
+
+
+    def by_date(self, cache_filter=None):
+        self.last_filter = cache_filter
+
+
+    def count(self, cache_filter): 
+        self.last_filter = cache_filter
+
+
+class MockCacheTokenTx(CacheTokenTx):
+
+    def deserialize(self, signed_tx):
+        h = hashlib.sha1()
+        try:
+            h.update(signed_tx + b'\x01')
+        except TypeError:
+            h.update(signed_tx.encode('utf-8') + b'\x01')
+        z = h.digest()
+        nonce = int.from_bytes(z[:4], 'big')
+        token_value = int.from_bytes(z[4:8], 'big')
+        value = int.from_bytes(z[8:12], 'big')
+        
+        h = hashlib.sha1()
+        h.update(z)
+        z = h.digest()
+        sender = z.hex()
+
+        h = hashlib.sha1()
+        h.update(z)
+        z = h.digest()
+        recipient = z.hex()
+
+        h = hashlib.sha1()
+        h.update(z)
+        z = h.digest()
+        token = z.hex()
+
+        h = hashlib.sha256()
+        h.update(z)
+        z = h.digest()
+        tx_hash = z.hex()
+
+        self.init(tx_hash, nonce, sender, recipient, value)
+        self.set('src_token', token)
+        self.set('dst_token', token)
+        self.set('src_value', token_value)
+        self.set('dst_value', token_value)
+        self.confirm(42, 13, 1024000)
+
+        return self
+
+
+class MockContentStore:
+
+    def __init__(self):
+        self.store = {}
+
+
+    def put(self, k, v):
+        self.store[k] = v
+
+
+    def get(self, k):
+        return self.store.get(k)

tests/old/test_query.py

@@ -345,6 +345,64 @@ class TestTxQuery(TestTxBase):
         txs = get_account_tx(self.chain_spec, self.alice, as_sender=True, as_recipient=False, not_status=StatusBits.QUEUED, status=StatusBits.IN_NETWORK, session=self.session)
         self.assertEqual(len(txs.keys()), 1)
 
+    def test_latest_txs(self):
+
+        nonce_hashes = [self.tx_hash]
+        tx_hash = add_0x(os.urandom(32).hex())
+        signed_tx = add_0x(os.urandom(128).hex())
+        create(
+                self.chain_spec,
+                42,
+                self.alice,
+                tx_hash,
+                signed_tx,
+                session=self.session,
+                )
+        txc = TxCache(
+                tx_hash,
+                self.alice,
+                self.bob,
+                self.foo_token,
+                self.bar_token,
+                self.from_value,
+                self.to_value,
+                session=self.session,
+                )
+        self.session.add(txc)
+        self.session.commit()
+
+        nonce_hashes.append(tx_hash)
+
+
+        tx_hash = add_0x(os.urandom(32).hex())
+        signed_tx = add_0x(os.urandom(128).hex())
+        create(
+                self.chain_spec,
+                41,
+                self.alice,
+                tx_hash,
+                signed_tx,
+                session=self.session,
+                )
+        txc = TxCache(
+                tx_hash,
+                self.alice,
+                self.bob,
+                self.foo_token,
+                self.bar_token,
+                self.from_value,
+                self.to_value,
+                session=self.session,
+                )
+        self.session.add(txc)
+
+        nonce_hashes.append(tx_hash)
+
+        txs = get_latest_txs(self.chain_spec, session=self.session)
+        self.assertEqual(len(txs.keys()), 3)
+
+        txs = get_latest_txs(self.chain_spec, count=1, session=self.session)
+        self.assertEqual(len(txs.keys()), 1)
 
 if __name__ == '__main__':
     unittest.main()

tests/test_cache.py

@@ -0,0 +1,95 @@
+# standard imports
+import os
+import logging
+import unittest
+import math
+
+# external imports
+from hexathon import add_0x
+from chainlib.chain import ChainSpec
+
+# local imports
+from chainqueue import QueueEntry
+from chainqueue.cache import (
+        CacheTokenTx,
+        CacheFilter,
+        )
+
+# test imports
+from tests.base_shep import TestShepBase
+from tests.common import (
+        MockTokenCache,
+        MockCacheTokenTx,
+        )
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+
+class MockNormalizer:
+
+    def address(self, v):
+        return 'address' + v
+
+
+    def value(self, v):
+        dv = int(math.log10(v) + 1)
+        return float(v / (10 ** dv))
+
+
+    def hash(self, v):
+        return 'ashbashhash' + v
+
+
+class TestCache(TestShepBase):
+
+    def setUp(self):
+        super(TestCache, self).setUp()
+        self.chain_spec = ChainSpec('foo', 'bar', 42, 'baz')
+        self.cache = MockTokenCache()
+
+    
+    def test_cache_instance(self):
+        normalizer = MockNormalizer()
+        a = b'foo'
+        tx = MockCacheTokenTx(self.chain_spec, normalizer=normalizer)
+        tx.deserialize(a)
+        self.assertTrue(isinstance(tx.value, float))
+        self.assertEqual(tx.sender[:4], 'addr')
+        self.assertEqual(tx.recipient[:4], 'addr')
+        self.assertEqual(tx.hash[:11], 'ashbashhash')
+
+
+    def test_cache_putget(self):
+        a = b'foo'
+        tx = MockCacheTokenTx(self.chain_spec)
+        tx.deserialize(a)
+        self.cache.put(self.chain_spec, tx)
+        tx_retrieved = self.cache.get(self.chain_spec, tx.hash)
+        self.assertEqual(tx, tx_retrieved)
+
+
+    def test_cache_filter(self):
+        normalizer = MockNormalizer()
+        fltr = CacheFilter(normalizer=normalizer)
+
+        sender = os.urandom(20).hex()
+        fltr.add_senders(sender)
+
+        recipient_one = os.urandom(20).hex()
+        recipient_two = os.urandom(20).hex()
+        fltr.add_recipients([recipient_one, recipient_two])
+
+        self.assertEqual(fltr.senders[0][:4], 'addr')
+        self.assertEqual(fltr.recipients[1][:4], 'addr')
+
+
+    def test_cache_query(self):
+        a = os.urandom(20).hex()
+        fltr = CacheFilter(nonce=42)
+        self.cache.count(fltr)
+        self.assertEqual(self.cache.last_filter, fltr)
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_entry.py

@@ -0,0 +1,85 @@
+# standard imports
+import os
+import logging
+import unittest
+
+# external imports
+from hexathon import add_0x
+from chainlib.tx import Tx
+from chainlib.block import Block
+
+# local imports
+from chainqueue import QueueEntry
+
+# test imports
+from tests.base_shep import TestShepBase
+from tests.common import MockCacheTokenTx
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+
+class TestEntry(TestShepBase):
+    
+    def test_entry_get(self):
+        signed_tx = add_0x(os.urandom(128).hex())
+        nonce = 42
+        entry = QueueEntry(self.store, cache_adapter=MockCacheTokenTx)
+        tx_hash_one = entry.create(signed_tx)
+
+        signed_tx = add_0x(os.urandom(128).hex())
+        nonce = 42
+        entry = QueueEntry(self.store, cache_adapter=MockCacheTokenTx)
+        tx_hash_two = entry.create(signed_tx)
+
+        txs = self.store.by_state(include_pending=True)
+        self.assertEqual(len(txs), 2)
+     
+        logg.debug('tx hash one {}'.format(tx_hash_one))
+        entry = QueueEntry(self.store, tx_hash=tx_hash_one, cache_adapter=MockCacheTokenTx)
+        entry.load()
+        entry.sent()
+        
+        txs = self.store.by_state(include_pending=True)
+        self.assertEqual(len(txs), 1)
+
+        txs = self.store.by_state(state=self.store.IN_NETWORK)
+        self.assertEqual(len(txs), 1)
+
+        entry.succeed(None, None)
+        txs = self.store.by_state(include_pending=True)
+        self.assertEqual(len(txs), 1)
+      
+        entry = QueueEntry(self.store, tx_hash_two)
+        entry.load()
+        entry.sent()
+        
+        txs = self.store.by_state(state=self.store.IN_NETWORK)
+        self.assertEqual(len(txs), 2)
+
+        txs = self.store.by_state(state=self.store.IN_NETWORK, strict=True)
+        self.assertEqual(len(txs), 1)
+
+
+    def test_entry_change(self):
+        signed_tx = add_0x(os.urandom(128).hex())
+        nonce = 42
+        entry = QueueEntry(self.store, cache_adapter=MockCacheTokenTx)
+        tx_hash = entry.create(signed_tx)
+
+        block = Block()
+        block.number = 13
+        tx = Tx(None)
+        tx.index = 666
+
+        entry.readysend()
+        entry.reserve()
+        entry.sendfail()
+
+        entry = QueueEntry(self.store, tx_hash, cache_adapter=MockCacheTokenTx)
+        entry.load()
+        self.assertEqual(str(entry.tx_hash), tx_hash)
+       
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_integrate.py

@@ -0,0 +1,119 @@
+# standard imports
+import os
+import tempfile
+import unittest
+import logging
+import time
+
+# external imports
+from shep.store.file import SimpleFileStoreFactory
+from chainlib.chain import ChainSpec
+
+# local imports
+from chainqueue import (
+        Store,
+        Status,
+        )
+
+# test imports
+from tests.common import (
+        MockCounter,
+        MockTokenCache,
+        MockCacheTokenTx,
+        MockContentStore,
+        )
+from tests.base_shep import TestShepBase
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+
+class TestIntegrateBase(TestShepBase):
+
+    def setUp(self):
+        self.path = tempfile.mkdtemp()
+        factory = SimpleFileStoreFactory(self.path).add
+        self.state = Status(factory)
+        content_store = MockContentStore()
+        counter = MockCounter()
+        chain_spec = ChainSpec('foo', 'bar', 42, 'baz')
+        self.cache = MockTokenCache()
+        self.store = Store(chain_spec, self.state, content_store, counter, cache=self.cache)
+
+
+    def test_integration_valid(self):
+        self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+
+    
+    def test_state_default(self):
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        v = self.store.pending()
+        self.assertEqual(len(v), 1)
+        self.assertEqual(v[0], hx)
+
+
+    def test_state_enqueue(self):
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        self.store.get(hx)
+        self.store.enqueue(hx)
+        v = self.store.upcoming()
+        self.assertEqual(len(v), 1)
+        v = self.store.pending()
+        self.assertEqual(len(v), 0)
+
+
+    def test_state_defer(self):
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        self.store.reserve(hx)
+        self.store.fail(hx)
+        v = self.store.deferred()
+        self.assertEqual(len(v), 1)
+        self.assertEqual(v[0], hx)
+
+
+    def test_state_multiple(self):
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        self.store.reserve(hx)
+        self.store.fail(hx)
+      
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        self.store.reserve(hx)
+        self.store.fail(hx)
+        v = self.store.deferred()
+        self.assertEqual(len(v), 2)
+
+
+    def test_state_multiple_sort(self):
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        self.store.reserve(hx)
+        self.store.fail(hx)
+       
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        self.store.enqueue(hx)
+        
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        self.store.reserve(hx)
+        self.store.fail(hx)
+
+        self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        v = self.store.deferred()
+        self.assertEqual(len(v), 2)
+
+
+    def test_state_date_threshold(self):
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        self.store.reserve(hx)
+        self.store.fail(hx)
+        then = self.store.modified(s)
+        time.sleep(0.1)
+
+        (s, hx) = self.store.put(os.urandom(8).hex(), cache_adapter=MockCacheTokenTx)
+        self.store.reserve(hx)
+        self.store.fail(hx)
+
+        v = self.store.deferred(threshold=then)
+        self.assertEqual(len(v), 1)
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_shep.py

@@ -0,0 +1,60 @@
+# standard imports
+import os
+import logging
+import unittest
+
+# external imports
+from hexathon import (
+        add_0x,
+        strip_0x,
+        )
+from shep.error import StateTransitionInvalid
+
+# local imports
+from chainqueue import QueueEntry
+
+# test imports
+from tests.base_shep import TestShepBase
+from tests.common import MockCacheTokenTx
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+
+class TestShep(TestShepBase):
+   
+    def test_shep_setup(self):
+        pass
+
+
+    def test_shep_tx(self):
+        signed_tx = add_0x(os.urandom(128).hex())
+        nonce = 42
+        tx = QueueEntry(self.store, cache_adapter=MockCacheTokenTx)
+        tx_hash = tx.create(signed_tx)
+
+        tx_retrieved = QueueEntry(self.store, tx_hash=tx_hash)
+        tx_retrieved.load()
+        self.assertEqual(tx_retrieved.signed_tx, strip_0x(signed_tx))
+
+
+    def test_shep_valid(self):
+        self.state.put('foo', 'bar')
+        self.state.set('foo', self.state.IN_NETWORK)
+        self.state.set('foo', self.state.FINAL)
+    
+
+    def test_shep_invalid(self):
+        self.state.put('foo', 'bar')
+        self.state.set('foo', self.state.FINAL)
+        with self.assertRaises(StateTransitionInvalid):
+            self.state.move('foo', self.state.INSUFFICIENT_FUNDS)
+   
+
+    def test_shep_cache(self):
+        self.store.put('bar', cache_adapter=MockCacheTokenTx)
+
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/test_store.py

@@ -0,0 +1,104 @@
+# standard imports
+import os
+import tempfile
+import unittest
+import logging
+import shutil
+
+# external imports
+from chainlib.chain import ChainSpec
+from shep.store.noop import NoopStoreFactory
+
+# local imports
+from chainqueue.store.fs import (
+        IndexStore,
+        CounterStore,
+        )
+from chainqueue.store.base import Store
+from chainqueue.error import DuplicateTxError
+from chainqueue.state import Status
+
+# tests imports
+from tests.common import (
+        MockTokenCache,
+        MockCacheTokenTx,
+        )
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+class TestStoreImplementations(unittest.TestCase):
+
+    def setUp(self):
+        self.path = tempfile.mkdtemp()
+      
+
+    def tearDown(self):
+        shutil.rmtree(self.path)
+
+    
+    def test_basic_index(self):
+        store = IndexStore(self.path)
+        hx = os.urandom(32).hex()
+        data = 'foo_bar_baz'
+        store.put(hx, data)
+        r = store.get(hx)
+        self.assertEqual(data, r)
+
+
+    def test_basic_counter(self):
+        store = CounterStore(self.path)
+        v = store.next()
+        self.assertEqual(v, 0)
+        v = store.next()
+        self.assertEqual(v, 1)
+
+        store = CounterStore(self.path)
+        v = store.next()
+        self.assertEqual(v, 2)
+
+
+    def test_duplicate(self):
+        store = IndexStore(self.path)
+        hx = os.urandom(32).hex()
+        data = 'foo_bar_baz'
+        store.put(hx, data)
+        with self.assertRaises(DuplicateTxError):
+            store.put(hx, data)
+
+
+    def test_upcoming_limit(self):
+        index_store = IndexStore(self.path)
+        counter_store = CounterStore(self.path)
+        chain_spec = ChainSpec('foo', 'bar', 42, 'baz') 
+        factory = NoopStoreFactory().add
+        state_store = Status(factory)
+        cache_store = MockTokenCache()
+        queue_store = Store(chain_spec, state_store, index_store, counter_store, cache=cache_store)
+
+        txs = []
+        for i in range(3):
+            tx_src = os.urandom(128).hex()
+            tx = queue_store.put(tx_src, cache_adapter=MockCacheTokenTx)
+            txs.append(tx)
+
+        r = queue_store.upcoming(limit=3)
+        self.assertEqual(len(r), 0)
+
+        for tx in txs:
+            queue_store.enqueue(tx[1])
+
+        r = queue_store.upcoming(limit=3)
+        self.assertEqual(len(r), 3)
+
+        queue_store.send_start(txs[0][1])
+        r = queue_store.upcoming(limit=3)
+        self.assertEqual(len(r), 2)
+
+        queue_store.send_end(txs[0][1])
+        r = queue_store.upcoming(limit=3)
+        self.assertEqual(len(r), 2)
+
+
+if __name__ == '__main__':
+    unittest.main()