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Olaoluwa Osuntokun
2015-10-07 20:38:24 -07:00
parent 6c11bcd0ce
commit 7a42591826
2 changed files with 45 additions and 33 deletions
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33
hornet.go
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@@ -5,39 +5,6 @@ import (
"golang.org/x/crypto/ripemd160"
)
// ========== Half Baked Idea to Allow Re-Routes via the Onion Route ==========
// So, it seems that using onion routing break re-routing by intermediate nodes
// (for w/e reason they deem neccessary). aj stumbled unto this realization in
// one of his latest mailing lists posts (I plan to post to the ML myself soon,
// but only after I've figured out all the quirks etc). ASIDE:: looks like Rusty is
// using zeroes as padding? HORNET uses random bytes in a way that still doesn't
// give away node position.
//
// I've thought of a way to allow intermdiate nodes to re-route, but it requires
// communicating with the source backwards on the onion route. Using HORNET,
// (during the set up phase) we can give each node in the hop the backwards
// AHDR (this allows them to route backwards to the source with a message) from
// their point of view. So basically, then have a partial onion (full onion is to destination).
// This would allow each of them to communicate back to the source since positions
// information isn't given away by the sphinx header, nor the data transmission header.
// This would let the intermediate nodes give recommendations of the route in a
// way. In the example: because a route is cheaper more capacity, non-responsive,
// rebalance route, etc.
//
// So, at first glance this looks to work. It avoids requiring the source to
// have a syncrhnous connection to *each* hop (which also makes the onio stuff
// pointless).
// ==========================================================================
// ==== Half Baked Thought About Control/Message separation along route =====
// Hop to hop data transmission implementation (negotiating changes to the commitment txns, adding htlc, etc)
// doesn't matter. Meaning, hop-to-hop the nodes can use w/e protos dictated
// by w/e protocol their running. Could even do some version exchange on first
// connect (yo I support v1, v2, vRusty (could have protocol bridges etc)).
// So the main standardization point is then on the fronts on control
// information within the onion routing: set up HTLC, re-route request, etc.
// =========================================================================
// TODO(roasbeef): Might need to change? due to the PRG* requirements? But
// yeh, once I add the LN specific stuff FSLength will change. Also doesn't
// 20 hops seem a bit excessive? 7?

45
notes.txt Normal file
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@@ -0,0 +1,45 @@
========== Half Baked Idea to Allow Re-Routes via the Onion Route ==========
So, it seems that using onion routing break re-routing by intermediate nodes
(for w/e reason they deem neccessary). aj stumbled unto this realization in
one of his latest mailing lists posts (I plan to post to the ML myself soon,
but only after I've figured out all the quirks etc).
I've thought of a way to allow intermdiate nodes to re-route, but it requires
communicating with the source backwards on the onion route. Using HORNET,
(during the set up phase) we can give each node in the hop the backwards
AHDR (this allows them to route backwards to the source with a message) from
their point of view. So basically, then have a partial onion (full onion is to destination).
This would allow each of them to communicate back to the source since positions
information isn't given away by the sphinx header, nor the data transmission header.
This would let the intermediate nodes give recommendations of the route in a
way. In the example: because a route is cheaper more capacity, non-responsive,
rebalance route, etc.
So, at first glance this looks to work. It avoids requiring the source to
have a syncrhnous connection to *each* hop (which also makes the onio stuff
pointless).
==========================================================================
==== Half Baked Thought About Control/Message separation along route =====
Hop to hop data transmission implementation (negotiating changes to the
commitment txns, adding htlc, etc)
doesn't matter. Meaning, hop-to-hop the nodes can use w/e protos dictated
by w/e protocol their running. Could even do some version exchange on first
connect (yo I support v1, v2, vRusty (could have protocol bridges etc)).
So the main standardization point is then on the fronts on control
information within the onion routing: set up HTLC, re-route request, etc.
=========================================================================
* One problem is that since R is the same, all the fancy stuff the schemes
do to ensure unlinkability amongst the route are moot. Perhaps there's a
way to give each intermedaite hop a new R' who's pre-image depends on the
R'' before it in a privacy preserving manner.
* Unsure, if using the onion for comms and control is a good idea. May just
make more sense to only use it so intermediate nodes don't learn the whole
path nor their possition in the path.
* So, for now I'm just implementing sphinx. If we decide in the future that
it's deseriable, then that's chill because I've already implemented the
set up phase for HORNET.