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Olaoluwa Osuntokun a7fe7ae941
routing: correct miscalculation multi-hop onion payload fees
In this commit we fix an existing miscalculation in the fees that we
prescribe within the onion payloads for multi-hop routes. Before this
commit, if a route had more than 3 hops, then we would erroneously give
the second to last hop zero fees.

In this commit we correct this behavior, and also re-write the fee
calculation code fragment within newRoute for readability and clarity.
There are now only two cases: this is the last hop, and this is any
other hop. In the case of the last hop, simply send the exact amount
with no additional fee. In the case of an intermediate hop, we use the
_prior_ (closer to the destination) hop to calculate the amount of fees
we need, which allows us to compute the incoming flow. Using that
incoming flow, we then can compute the amount that the hop should
forward out.

Partially fixes #391.
2017-10-24 18:27:35 -07:00
autopilot multi: Update lnd to use new feature vector API. 2017-10-17 22:47:20 -07:00
brontide brontide: set read deadlines on socket during initial handshake 2017-10-04 14:58:20 -07:00
chainntnfs chainntnfs: Remove some unnecessary channels in interface_test. 2017-10-19 20:00:16 -07:00
channeldb multi: Update lnd to use new feature vector API. 2017-10-17 22:47:20 -07:00
cmd/lncli lncli: add commands "create" and "unlock" 2017-10-19 19:17:35 -07:00
contrib contrib: add basic bash completion for lncli 2017-01-29 18:12:53 -08:00
discovery multi: Update lnd to use new feature vector API. 2017-10-17 22:47:20 -07:00
docker Fix spelling in docker docs 2017-10-19 20:03:00 -07:00
docs docs/go-fuzz: rename wirefuzz.md to README.md 2017-10-05 18:30:26 -07:00
htlcswitch htlcswitch: as exit node check for invoice and HTLC value match after existence 2017-10-22 18:37:00 -07:00
lnrpc lnrpc: add cltv_expiry to Invoice and PayReq protos 2017-10-22 18:36:53 -07:00
lnwallet lnwallet: introduce distinct HTLC counter+index on top of updateLog 2017-10-22 18:36:57 -07:00
lnwire multi: Update lnd to use new feature vector API. 2017-10-17 22:47:20 -07:00
macaroons macaroons: rename PermissionsConstraint to AllowConstraint 2017-09-19 16:46:20 -07:00
routing routing: correct miscalculation multi-hop onion payload fees 2017-10-24 18:27:35 -07:00
shachain shachain: Add two missing test cases from the BOLT spec. 2017-10-05 16:54:38 -07:00
walletunlocker walletunlocker: don't utilize the macaroon authentication service 2017-10-19 19:46:48 -07:00
zpay32 rpc: properly interpret and parse cltvDelta from payreqs (if exists) 2017-10-22 18:37:00 -07:00
.gitignore git: add .DS_Store to .gitignore, remove obsolete entries 2017-05-04 17:39:15 -07:00
.travis.yml test: add upload of integration logs from TravisCI builds 2017-10-17 15:42:22 -07:00
breacharbiter_test.go breacharbiter_test: updated test vectors for new retInfo struct 2017-09-25 18:57:03 -07:00
breacharbiter.go lnwallet: Use TxWeightEstimator in breacharbiter. 2017-10-19 17:37:53 -07:00
chainparams.go chainparams: ensure target chain checkpoints are properly set 2017-09-01 03:17:28 -07:00
chainregistry.go lnd: revert back to prior default wallet public passphrase 2017-10-19 19:53:28 -07:00
config.go config: add --noencryptwallet flag 2017-10-19 19:17:35 -07:00
doc.go add some daemon related skeleton files 2015-12-26 00:09:17 -06:00
fundingmanager_test.go tests: cleanup of fundingmanager_test.go 2017-10-02 13:29:53 +02:00
fundingmanager.go multi: Update lnd to use new feature vector API. 2017-10-17 22:47:20 -07:00
glide.lock build: update glide files to point to latest btcd 2017-10-16 20:30:49 -07:00
glide.yaml build: update glide files to point to latest btcd 2017-10-16 20:30:49 -07:00
gotest.sh test: add upload of integration logs from TravisCI builds 2017-10-17 15:42:22 -07:00
invoiceregistry.go lnd+rpc: update RPC responses to convert mSAT to SAT 2017-08-22 00:52:56 -07:00
LICENSE add copyright, license and discouragement in readme 2016-01-16 00:13:11 -08:00
lnd_test.go test: modify all testing involving HTLC routing to directly use payreqs 2017-10-22 18:37:02 -07:00
lnd.go lnd: revert back to prior default wallet public passphrase 2017-10-19 19:53:28 -07:00
log.go log: add logger for the autopilot package 2017-08-10 21:39:47 -07:00
logo.png README: add logo to top portion of page 2017-09-29 14:06:31 -07:00
mock.go lnwallet: Extend Utxo struct with AddressType. 2017-10-19 17:37:53 -07:00
networktest_test.go netharness: remove test for the node restart method 2016-11-16 12:46:45 -08:00
networktest.go networktest: --noencryptwallet for test nodes 2017-10-19 19:17:35 -07:00
nodesigner.go nodeSigner: add method for signing already hashed data 2017-09-27 12:25:45 +02:00
peer_test.go peer: add channel close fee negotiation 2017-08-11 12:10:32 +02:00
peer.go peer: print hex encoded failure reason for lnwire.UpdateFailHTLC in msg summaries 2017-10-22 18:36:40 -07:00
pilot.go lnd+rpc: update RPC responses to convert mSAT to SAT 2017-08-22 00:52:56 -07:00
README.md README: add additional check boxes for BOLT spec compliance 2017-09-29 14:42:38 -07:00
release.sh build: add release script 2017-01-12 18:30:47 -08:00
rpcserver.go rpc: properly interpret and parse cltvDelta from payreqs (if exists) 2017-10-22 18:37:00 -07:00
server.go server: add new shouldRequestGraphSync method to gate third feature bit 2017-10-18 15:18:13 -07:00
signal.go lnrpc+rpc+lnd: add new Stop command for gracefully shutting down lnd 2017-05-11 14:55:56 -07:00
test_utils.go peer: Update peer handling of received feature vectors. 2017-10-17 22:47:20 -07:00
utxonursery_test.go utxonursery_test: properly print error msg during init failure 2017-10-03 19:40:09 -07:00
utxonursery.go utxonursery: adds compile-time iface check for baby and kid outputs 2017-10-05 18:13:48 -07:00
version.go lnd+cmd/lncli: bump to version 0.3 2017-08-23 11:57:01 -07:00

Lightning Network Daemon

Build Status MIT licensed Irc Godoc Coverage Status

The Lightning Network Daemon (lnd) - is a complete implementation of a Lightning Network node and currently deployed on testnet3 - the Bitcoin Test Network. lnd has several pluggable back-end chain services including btcd (a full-node) and neutrino (a new experimental light client). The project's codebase uses the btcsuite set of Bitcoin libraries, and also exports a large set of isolated re-usable Lightning Network related libraries within it. In the current state lnd is capable of:

  • Creating channels.
  • Closing channels.
  • Completely managing all channel states (including the exceptional ones!).
  • Maintaining a fully authenticated+validated channel graph.
  • Performing path finding within the network, passively forwarding incoming payments.
  • Sending outgoing onion-encrypted payments through the network.
  • Updating advertised fee schedules.
  • Automatic channel management (autopilot).

Lightning Network Specification Compliance

lnd doesn't yet fully conform to the Lightning Network specification (BOLTs). BOLT stands for: Basic of Lightning Technologies. The specifications are currently being drafted by several groups of implementers based around the world including the developers of lnd. The set of specification documents as well as our implementation of the specification are still a work-in-progress. With that said, lnd the current status of lnd's BOLT compliance is:

  • BOLT 1: Base Protocol
  • BOLT 2: Peer Protocol for Channel Management
    • lnd has not yet integrated full channel re-transmission upon reconnection
  • BOLT 3: Bitcoin Transaction and Script Formats
  • BOLT 4: Onion Routing Protocol
  • BOLT 5: Recommendations for On-chain Transaction Handling
  • BOLT 7: P2P Node and Channel Discovery
  • BOLT 8: Encrypted and Authenticated Transport
  • BOLT 9: Assigned Feature Flags
  • BOLT 10: DNS Bootstrap and Assisted Node Location
  • BOLT 11: Invoice Protocol for Lightning Payments

Developer Resources

The daemon has been designed to be as developer friendly as possible in order to facilitate application development on top of lnd. Two primary RPC interfaces are exported: an HTTP REST API, and a gRPC service. The exported API's are not yet stable, so be warned: they may change drastically in the near future.

An automatically generated set of documentation for the RPC APIs can be found at api.lightning.community. A set of developer resources including talks, articles, and example applications can be found at: dev.lightning.community.

Finally, we also have an active Slack where protocol developers, application developers, testers and users gather to discuss various aspects of lnd and also Lightning in general.

Installation

In order to build from source, please see the installation instructions.

IRC

  • irc.freenode.net
  • channel #lnd
  • webchat

Further reading