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dd2bd6704945aca98d18be959773fbf109082a7e
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52 Commits

Author SHA1 Message Date
Greg Fitzgerald
dd2bd67049 Add a barebones test for transaction conditions 2018-03-08 08:58:34 -07:00
Greg Fitzgerald
e759bd1a99 Add conditions to the signature to reject duplicates 2018-03-08 08:18:34 -07:00
Greg Fitzgerald
94daf4cea4 Add Cancel and Timestamp events 
Fixes #31, #34, #39
 2018-03-08 08:17:34 -07:00
Greg Fitzgerald
2379792e0a Add DateTime and Cancel conditions 
Fixes #32, #33
 2018-03-08 08:17:08 -07:00
Greg Fitzgerald
5dd567deef Rename Genesis to Mint 
Genesis is a story of creation. We should only use that term to
for the event log that bootstraps the system.
 2018-03-07 17:08:15 -07:00
Greg Fitzgerald
491ba9da84 Add accessors to keypairs and signatures 2018-03-07 15:32:22 -07:00
Greg Fitzgerald
9834c251d0 Boot genesis block helper 
Before this change, if you wanted to use a new Transaction
feature in the genesis block, you'd need to extend its
Creator object and associated methods.  With yesterday's
addtions to Transcation, it's now so easy to work with
Transactions directly that we can get rid of the middleman.

Also added a KeyPair type alias, so that ring could be easily swapped
out with a competing library, if needed.
 2018-03-07 11:10:15 -07:00
Greg Fitzgerald
d1b6206858 Monomorphisize Entry and Event 
Transaction turned out to be the only struct worth making generic.
 2018-03-06 20:29:18 -07:00
Greg Fitzgerald
b725fdb093 Sha256Hash -> Hash 
Because in Loom, there's just the one. Hopefully no worries that it
shares a name with std::Hash.
 2018-03-06 17:40:01 -07:00
Greg Fitzgerald
1436bb1ff2 Move entry into its own module 
Hmm, Logger doesn't depend on log.
 2018-03-06 17:40:01 -07:00
Greg Fitzgerald
5a44c36b1f Move hash into its own module 2018-03-06 17:40:01 -07:00
Greg Fitzgerald
f09952f3d7 DRY up transaction signing 
Cleanup the big mess I copy-pasted myself into.
 2018-03-06 16:34:25 -07:00
Greg Fitzgerald
4376032e3a data -> asset 
'data' is too vague.
 2018-03-06 14:50:32 -07:00
Greg Fitzgerald
624c151ca2 Add signature module 
Because things other than transactions can be signed.
 2018-03-06 12:48:28 -07:00
Greg Fitzgerald
b019416518 Move verify into methods 
A little overly-coupled to Serialize, but makes the code a lot tighter
 2018-03-06 12:27:08 -07:00
Greg Fitzgerald
4fcd9e3bd6 Give Transaction its own module 2018-03-06 12:18:17 -07:00
Greg Fitzgerald
66bf889c39 Rename Transfer to Transaction 
struct names should be nouns
 2018-03-06 11:54:47 -07:00
Greg Fitzgerald
a2811842c8 More cleanup 
Far fewer branches when we process transfers outside the context
of events.
 2018-03-06 11:43:55 -07:00
Greg Fitzgerald
6543497c17 Move Transaction data into its own struct 
This will allow us to add addition transfer types to the log.
 2018-03-06 10:50:32 -07:00
Greg Fitzgerald
720c54a5bb Allow balances to be negative 
* Will allow owners to loan token to others.
* Will allow for parallel verification of balances without spilling
  over 64 bits.

Fixes #43
 2018-03-05 17:30:53 -07:00
Greg Fitzgerald
a4336a39d6 Initialize the testnode from a log 
$ cargo run --bin silk-genesis-file-demo > demo-genesis.json
$ cat demo-genesis.json | cargo run --bin silk-genesis-block > demo-genesis.log
$ cat demo-genesis.log | cargo run --bin silk-testnode
 2018-03-05 15:34:44 -07:00
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
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
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
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
7cf0d55546 Remove optional 'from' field 2018-03-03 20:41:07 -07:00
Greg Fitzgerald
bebba7dc1f Give logger its own crate 2018-03-03 14:24:32 -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
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
c935fdb12f Move signature duplicate detection into the historian 2018-03-01 17:44:10 -07:00
Greg Fitzgerald
570e71f050 Check for duplicate signatures 
TODO: have client add recent hash to each message
 2018-03-01 14:07:39 -07:00
Greg Fitzgerald
c9cc4b4369 Switch to UDP from TCP 
And remove all the sleep()'ing around.
 2018-03-01 13:47:53 -07:00
Greg Fitzgerald
4610de8fdd Switch to sync_channel to preserve order 2018-02-28 19:33:28 -07:00
Greg Fitzgerald
3fcc2dd944 Add testnode 
Fixes #20
 2018-02-28 18:05:20 -07:00
Greg Fitzgerald
8299bae2d4 Add accountant stub 2018-02-28 16:01:12 -07:00
Greg Fitzgerald
604ccf7552 Add network interface for accountant 2018-02-28 14:00:04 -07:00
Greg Fitzgerald
fa4d9e8bcb Add more tests 2018-02-27 11:28:10 -07:00