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routing: use unified policy for path finding

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In this commit we change path finding to no longer consider all channels
between a pair of nodes individually. We assume that nodes forward
non-strict and when we attempt a connection between two nodes, we don't
want to try multiple channels because their policies may not be identical.
Having distinct policies for channel to the same peer is against the
recommendation in the spec, but it happens in the wild. Especially since
we recently changed the default cltv delta value.

What this commit introduces is a unified policy. This can be looked upon
as the greatest common denominator of all policies and should maximize
the probability of getting the payment forwarded.
This commit is contained in:
Joost Jager
2019-09-30 13:14:49 +02:00
parent 6b391d04d0
commit a347237e7a
4 changed files with 392 additions and 99 deletions
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12
lnwire/msat.go
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@@ -6,9 +6,15 @@ import (
"github.com/btcsuite/btcutil"
)
// mSatScale is a value that's used to scale satoshis to milli-satoshis, and
// the other way around.
const mSatScale uint64 = 1000
const (
// mSatScale is a value that's used to scale satoshis to milli-satoshis, and
// the other way around.
mSatScale uint64 = 1000
// MaxMilliSatoshi is the maximum number of msats that can be expressed
// in this data type.
MaxMilliSatoshi = ^MilliSatoshi(0)
)
// MilliSatoshi are the native unit of the Lightning Network. A milli-satoshi
// is simply 1/1000th of a satoshi. There are 1000 milli-satoshis in a single