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643 Commits

Author SHA1 Message Date
Rusty Russell
0dbbd81430 bitcoind: tell bitcoind_poll_transactions's callback if tx is a coinbase. 
In this case, the inputs aren't valid transactions, so don't try to
find them.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
5b9f8d8bbd bitcoind: serialize requests. 
bitcoind has a limit of 16 requests at once, by default, so our simplest
solution is to serialize them.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
980d0d2bf1 bitcoind: warn if their bitcoin config not on testnet/regtest. 
Otherwise you get weird errors as bitcoind refuses our testnet addresses.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
34e32978b8 bitcoind: warn if their bitcoin config doesn't have walletbroadcast=0. 
Because we use the bitcoin wallet to create the anchor transaction, we
need to make sure it doesn't broadcast it; safest to check their config
for the option.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
c51a8d804f bitcoind: routine to send to a specific address. 
We use this to create our anchor payment.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
c0766061fa dns: don't allow non-stream sockets. 
It was "connecting" to "localhost 30000" successfully, because it was
using UDP.  Oops.

This reveals another issue: init_conn() uses the wrong address to
connect to, as we'd already incremented the pointer in try_connect_one().

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
d5328c7577 bitcoind: routine to broadcast a transaction. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
fc49e3fd74 daemon: rename 'state' to 'dstate' everywhere. 
This is the daemon state, not the state machine state.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
b04392609a daemon: encapsulate each side's state in a struct. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
0376e08fea daemon: peer needs to know who offered the anchor. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
e9237f94b1 daemon/watch: API to watch various bitcoin transactions. 
This uses the functions in bitcoind to provide callbacks when various
things happen.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
5ec8ff91e4 daemon/bitcoind: communication with bitcoind. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
24602459b1 daemon/config: add testnet. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
d303393d67 daemon/peer: save their commit key too. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
a5aa7b9abd daemon: config file support. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:49 +10:30
Rusty Russell
bf3080ca09 secrets: handle per-peer secrets as well. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
08ccb4b6f0 getpeers: new command. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
d8959b3117 peer: make connect command an async command. 
So it can return failure.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
366f8a5f3f dns: add failure callback. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
d68ae0b612 jsonrpc: adapt it to be async. 
This allows for JSON commands which aren't instantaneous.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
74f294e36c daemon: encrypted communication (version 3) 
After useful feedback from Anthony Towns and Mats Jerratsch (of
thunder.network fame), this is the third version of inter-node crypto.

1) First, each side sends a 33-byte session pubkey.  This is a
   bitcoin-style compressed EC key, unique for each session.
  
2) ECDH is used to derive a shared secret.  From this we generate
   the following transmission encoding parameters for each side:
   Session AES-128 key: SHA256(shared-secret || my-sessionpubkey || 0)
   Session HMAC key: SHA256(shared-secret || my-sessionpubkey || 1)
   IV for AES: SHA256(shared-secret || my-sessionpubkey || 2)

3) All packets from then on are encrypted of form:
	/* HMAC, covering totlen and data */
	struct sha256 hmac;
	/* Total data transmitted (including this). */
	le64 totlen;
	/* Encrypted contents, rounded up to 16 byte boundary. */
	u8 data[];

4) The first packet is an Authenticate protobuf, containing this node's
   pubkey, and a bitcoin-style EC signature of the other side's session
   pubkey.

5) Unknown protobuf fields are handled in the protocol as follows
   (including in the initial Authenticate packet):

   1) Odd numbered fields are optional, and backwards compatible.
   2) Even numbered fields are required; abort if you get one.

Currently both sides just send an error packet "hello" after the
handshake, and make sure they receive the same.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
9449f387ac daemon: primitive privkey handling. 
Eventually this will be in a separate process, etc.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
29c8611e53 daemon: add helper to log hex. 
Good for keys; eventually we'll want to log structures by type though.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
14cbcd467f daemon: add global secp256k1 context for easy access. 
This caches the tables, so you're not supposed to regenerate it all
the time.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
2df28021ac daemon: command to connect 
Now we can connect two daemons to each other.  Who both say Hello! and
close.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
39120b3ac6 daemon: async DNS lookups. 
Also based on pettycoin code.

(With embarrassing bug fixed where it didn't increment the address used,
 thus using 100% CPU if that connect failed!)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
e4224f72d4 daemon: netaddr 
Structure for a net address.  We can expand it later to cover exotic
address types (Tor?).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
469401610f daemon: socket code. 
At the moment, if you connect it just says Hello! and closes the socket.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
c28a9ce6c7 daemon: lightning-cli 
Minimal possible implementation; not real parsing or pretty printing.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
9ccb51c93f daemon: UNIX domain socket for JSON-based control. 
Also taken from pettycoin. 

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
6ccfcf4477 daemon: timeout structure for IO. 
For better or worse, the ccan/timer structure is completely minimal,
and designed to be wrapped inside a container structure.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
aed857a30c json: routine to create a uint64_t field. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
725512fb03 json: parse bitcoind-style bitcoin amount. 
Always of form d*.dddddddd; we turn that into satoshis, because we're
sane.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
06a25887da json: routine to parse a uint64_t. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
ac4491909c daemon/json: helpers for using jsmn. 
Also taken from pettycoin.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
0c81b0918a daemon/jsmn: build the module. 
Can't build inside the submodule, as that makes it dirty.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
378dadc371 daemon: configuration directory (default ~/.lightning). 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
7b766f4bc8 daemon: fatal() function. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:48 +10:30
Rusty Russell
89f1f1548e daemon: dump logs on crash. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:47 +10:30
Rusty Russell
117cf6b02d daemon: add logging options. 
Particularly logging to file.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:47 +10:30
Rusty Russell
3e77c55a3b Makefile: add daemon source sanity checks. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:47 +10:30
Rusty Russell
dd35260ce8 daemon: first code. 
Logging code based heavily on pettycoin's.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:41:47 +10:30
Rusty Russell
deb2e7b654 daemon/jsmn: Add submodule for jsmn. 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2016-01-22 06:37:13 +10:30