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Author SHA1 Message Date
Greg Fitzgerald
48c28c2267 Transactions now require a hash of the last entry they've seen 
This ensures the transaction cannot be processed on a chain
that forked before that ID. It will also provide a basis for
expiration constraints. A client may want their transaction
to expire, and the generators may want to reject transactions
that have been floating in the ether for years.
 2018-03-05 12:48:14 -07:00
Greg Fitzgerald
d76ecbc9c9 Don't block the server 2018-03-05 11:39:59 -07:00
Greg Fitzgerald
79fb9c00aa Boot wait_on_signature() from accountant 
Instead, there should be a way to query for a page of log data,
and checking whether it has a signature should be done client-side.
 2018-03-05 10:45:18 -07:00
Greg Fitzgerald
c9e03f37ce Logger now only speaks when spoken to 
Before this change, the logger's send channel could quickly be
flooded with Tick events. Those events should only be passed to
a writer.

Also, the log_event() function no longer sends entries. That
functionality moved to the new process_events() function. This
will allow us to initialize the with the genesis block without
flooding the send channel with events the historian won't read.
 2018-03-05 10:33:12 -07:00
Greg Fitzgerald
aa5f1699a7 Update the set of unique signatures when loading an existing log. 2018-03-04 22:31:12 -07:00
Greg Fitzgerald
e1e9126d03 Merge pull request #44 from garious/genesis 
Finally, genesis block generation without channels
 2018-03-04 14:39:28 -07:00
Greg Fitzgerald
672a4b3723 Update historian diagram 2018-03-04 14:36:55 -07:00
Greg Fitzgerald
955f76baab Finally, genesis block generation without channels 2018-03-04 14:32:30 -07:00
Greg Fitzgerald
7da8a5e2d1 Merge pull request #42 from garious/genesis 
Make num_hashes more intuitive
 2018-03-04 13:05:38 -07:00
Greg Fitzgerald
ff82fbf112 Make num_hashes mean the num_hashes since the last ID 
Before this change, num_hashes meant the number of hashes since
the last ID, minus any hashing done on the event data. It made
no difference for Tick events, but logged Transaction events with
one less hash than actually occurred.
 2018-03-04 09:52:36 -07:00
Greg Fitzgerald
8503a0a58f Refactor 2018-03-04 09:21:45 -07:00
Greg Fitzgerald
b1e9512f44 Rename end_hash to id 2018-03-04 07:50:26 -07:00
Greg Fitzgerald
608def9c78 Consolidate imports 2018-03-04 07:28:51 -07:00
Greg Fitzgerald
bcb21bc1d8 Delete dead code 2018-03-04 07:20:17 -07:00
Greg Fitzgerald
f63096620a Merge pull request #41 from garious/genesis 
Add command-line tool for generating a genesis block
 2018-03-04 01:27:59 -07:00
Greg Fitzgerald
9b26892bae Add a demo app to generate the genesis file 2018-03-04 01:21:40 -07:00
Greg Fitzgerald
572475ce14 Load the genesis block 2018-03-04 00:15:17 -07:00
Greg Fitzgerald
876d7995e1 Refactor to support loading an existing ledger 2018-03-03 22:25:40 -07:00
Greg Fitzgerald
b8655e30d4 Make client-demo standalone 
And remove deposit() methods from the API. Those should only be
used on the server to bootstrap.
 2018-03-03 21:15:51 -07:00
Greg Fitzgerald
7cf0d55546 Remove optional 'from' field 2018-03-03 20:41:07 -07:00
Greg Fitzgerald
ce60b960c0 Special case sending money to self 
In the genesis block, let matching 'from' and 'to' keys be used
to mint new coin.
 2018-03-03 20:27:12 -07:00
Greg Fitzgerald
cebcb5b92d Start genesis with a Tick, so that its hash can be used to bootstrap verification 2018-03-03 19:57:22 -07:00
Greg Fitzgerald
11a0f96f5e Add command-line tool for generating a genesis block 2018-03-03 17:35:05 -07:00
Greg Fitzgerald
74ebaf1744 Merge pull request #40 from garious/add-logger 
Add logger
 2018-03-03 14:37:15 -07:00
Greg Fitzgerald
f7496ea6d1 Make create_logger a static method 
Allows us to share the super long type signature in impl.
 2018-03-03 14:26:59 -07:00
Greg Fitzgerald
bebba7dc1f Give logger its own crate 2018-03-03 14:24:32 -07:00
Greg Fitzgerald
afb2bf442c Use Instant instead of SystemTime for more precise ticking 
And convert log_event from function to method
 2018-03-03 14:08:53 -07:00
Greg Fitzgerald
c7de48c982 Convert log_events from function to method 2018-03-03 14:00:37 -07:00
Greg Fitzgerald
f906112c03 Move logging thread's state into a struct 2018-03-03 13:52:57 -07:00
Greg Fitzgerald
8ef864fb39 Merge pull request #37 from garious/split-benchmark 
Split benchmark
 2018-03-03 12:13:54 -07:00
Greg Fitzgerald
1c9b5ab53c Report performance of signature verification too 2018-03-03 11:59:34 -07:00
Greg Fitzgerald
c10faae3b5 More readable metrics 2018-03-03 11:52:50 -07:00
Greg Fitzgerald
2104dd5a0a Fix benchmark 
Was measuring the creation of the iterator, not running it.
 2018-03-03 11:45:23 -07:00
Greg Fitzgerald
fbe64037db Merge pull request #35 from garious/split-benchmark 
Move key generation and signing from transaction benchmark
 2018-03-03 11:25:58 -07:00
Greg Fitzgerald
d8c50b150c Move key generation and signing from transaction benchmark 
Key generation, signing and verification are not the performance
bottleneck. Something is probably wrong here.
 2018-03-03 11:11:46 -07:00
Greg Fitzgerald
8871bb2d8e Merge pull request #30 from garious/simplify 
Unify Claim and Transaction handling
 2018-03-02 12:24:44 -07:00
Greg Fitzgerald
a148454376 Update readme 2018-03-02 12:07:05 -07:00
Greg Fitzgerald
be518b569b Remove cyclic dependency between event and log 2018-03-02 12:03:59 -07:00
Greg Fitzgerald
c998fbe2ae Sign the owner's public key 
Without this, the accountant will reject transfers from different
entities if they are for the same amount and to the same entity.
 2018-03-02 11:56:42 -07:00
Greg Fitzgerald
9f12cd0c09 Purge the Claim event type 
It's now represented as a Transaction from an unknown party.
 2018-03-02 11:48:58 -07:00
Greg Fitzgerald
0d0fee1ca1 Sign Claim's 'to' field 
Otherwise, the accountant will treat deposits of the same amount as
duplicates.
 2018-03-02 11:46:22 -07:00
Greg Fitzgerald
a0410c4677 Pipe all Claim constructors through a function 2018-03-02 10:58:43 -07:00
Greg Fitzgerald
8fe464cfa3 Rename Claim's key field to match same field in Transaction 2018-03-02 10:47:21 -07:00
Greg Fitzgerald
3e2d6d9e8b Generalize Transaction to express a Claim 
If a Transaction doesn't have an existing address, it's being used
to create new funds.
 2018-03-02 10:41:15 -07:00
Greg Fitzgerald
32d677787b Reduce transactions sent by demo 
We don't do retries yet, so keep tx count to something that won't
trigger any packet loss.
 2018-03-02 10:35:38 -07:00
Greg Fitzgerald
dfd1c4eab3 Don't process transaction if channel.send() fails. 
Do all input validation first, then log (which can fail). If all
goes swimmingly, process the transaction.
 2018-03-02 10:17:52 -07:00
Greg Fitzgerald
36bb1f989d More defense against a double-spend attack 
Before this change, a client could spend funds before the accountant
processed a previous spend. With this change in place, the accountant
updates balances immediately, but that comes at an architectural cost.
The accountant now verifies signatures on behalf of the historian, so
that it can ensure logging will not fail.
 2018-03-02 09:55:44 -07:00
Greg Fitzgerald
684f4c59e0 Delete commented out code 
accountant crate shouldn't verify the log. Instead, it should
only add valid entries and leave verification to network nodes.
 2018-03-02 08:51:29 -07:00
Greg Fitzgerald
1b77e8a69a Move Event into its own crate 
The log crate was starting to be the catch-all for all things
related to entries, events, signatures, and hashes. This split
shows us that:

* Event depends only on signatures, not on hashes [directly]
* All event testing was done via log testing (shame on me)
* Accounting depends only on events
 2018-03-02 08:43:57 -07:00
Greg Fitzgerald
662e10c3e0 Merge pull request #29 from garious/simplify 
Remove Discovery event
 2018-03-01 18:53:25 -07:00