This fixes the root cause of https://github.com/ElementsProject/lightning/issues/1212
where we deleted the payment because we wanted to retry, then retry failed
so we had an (old) HTLC without a matching payment. We then fed that
HTLC to onchaind, which tells us it's missing, and we try to fail the
payment and deref a NULL pointer.
Fixes: #1212
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We would `block_map_add` inside `add_tip`, but we never
`block_map_del` inside `remove_tip`, which is dangerous as
we actually `tal_free` the block inside `remove_tip`.
Our CI did not reliably trap this problem since block
hashes are random and rerunning the `test_blockchaintrack`
often passed spuriously.
If we're going to simply take() a pointer, don't allocate it off a random
object. Using NULL makes our intent clear, particularly with allocating
packets we're going to take() onto a queue.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
I did a brief audit of tmpctx uses, and we do leak them in various
corner cases. Fortunely, all our daemons are based on some kind of
I/O loop, so it's fairly easy to clean a global tmpctx at that point.
This makes things a bit neater, and slightly more efficient, but also
clearer: I avoided creating a tmpctx in a few places because I didn't
want to add another allocation. With that penalty removed, I can use
it more freely and hopefully write clearer code.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Needed for particular race condition: client calls `sendpay` with
intent to call `waitsendpay` later to get information, but the
payment fails after `sendpay` returns but before client can invoke
`waitsendpay`.
This lets client know of information even if it manages to invoke
`waitsendpay` "late".
As we add more features, the current code is insufficient.
1. Keep an array of single feature bits, for easy switching on and off.
2. Create feature_offered() which checks for both compulsory and optional
variants.
3. Invert requires_unsupported_features() and unsupported_features()
which tend to be double-negative, all_supported_features() and
features_supported().
4. Move single feature definition from wire/peer_wire.h to common/features.h.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Improve usability in these scenarios:
* bitcoin-cli not available in PATH and/or bitcoind not running
* bitcoin-cli available in PATH but bitcoind is not running
This simplifies things, and means it's always in the database. Our
previous approach to creating it on the fly had holes when it was
created for onchaind, causing us to use another every time we
restarted.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Our testing also reveals a bug: we start lightningd and shut it down
before fully processing the blockchain, so we don't set
last_processed_block. Fix that by setting it immediately once we have
a block: worst case it goes backwards a little.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
In general, it is true that accessors should take const and discard it,
but chainparams is *always* const.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell
practicalswift
Christian Decker
John Barboza
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