We need to do it in various places, but we shouldn't do it lightly:
the primitives are there to help us get overflow handling correct.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is particularly interesting because we handle overflow during route
calculation now; this could happen in theory once we wumbo.
It fixes a thinko when we print out routehints, too: we want to print
them out literally, not print out the effect they have on fees (which
is in the route, which we also print).
This ABI change doesn't need a CHANGELOG, since paystatus is new since
release.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The current param_sat accepts "any": rename and move that to invoice.c
where it's called. We rename it to param_msat_or_any and invoice.c
is our first (trivial) amount_msat user.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We need to still accept it when parsing the database, but this flag
should allow upgrade testing for devs building on top
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Up until now, riskfactor was useless due to implementation bugs, and
also the default setting is wrong (too low to have an effect on
reasonable payment scenarios).
Let's simplify the definition (by assuming that P(failure) of a node
is 1), to make it a simple percentage. I examined the current network
fees to see what would work, and under this definition, a default of
10 seems reasonable (equivalent to 1000 under the old definition).
It is *this* change which finally fixes our test case! The riskfactor
is now 40msat (1500000 * 14 * 10 / 5259600 = 39.9), comparable with
worst-case fuzz is 50msat (1001 * 0.05 = 50).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is the direct cause of the failure of the original
test_pay_direct test and it makes sense: invoice routehints may not be
necessary, so try without them *first* rather than last.
We didn't mention the use of routehints in CHANGELOG at all yet, so
do that now.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Christian points out that we can iterate by ->size rather than calling
json_next() to find the end (which traverses the entire object!).
Now ->size is reliable (since previous patch), this is OK.
Reported-by: @cdecker
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Avoid the unnecessary extra var, and don't use "capacity" since
that usually refers to static capacity.
Reported-by: @cdecker
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
So add a new 'strategy' field. This makes it clearer what is going
on, currently one of:
* "Initial attempt"
* "Excluded channel <scid>"
* "Removed route hint"
* "Excluded expensive channel <scid>"
* "Excluded delaying channel <scid>"
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We sanitize the routes: firstly, we assume appending so eliminate the
first hop if the route points straight to us. Secondly, eliminate empty
hints. Thirdly, trim overlong hints.
Then we just use the first route hint.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We use the 'exclude' option to getroute for successive attempts. This
is more robust than having gossipd disable for some limited time.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
I wrote this sync first, then rewrote async, then developed libplugin.
But committing all that just wastes reviewer time, so I present it as
if it was always asnc and using the library helper.
Currently the command it registers is 'pay2', but when it's complete
we'll remove the internal 'pay' and rename it. This does a single
'getroute/sendpay' call. No retries, no options.
Shockingly, this by itself is almost sufficient to pass our current test
suite with `pay`->`pay2`.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell