Questions tagged [c-lightning]

c-lightning is a standard compliant implementation of the Lightning Network protocol. The Lightning Network is a scalability solution for Bitcoin, enabling secure and instant transfer of funds between any two parties for any amount.

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1answer
19 views

Different fee rate units - sat/vB, sat perkw, sat perkb

While reading documentation of C-Lightning I found this in section about making onchain transactions with the wallet (funding and withdrawing the wallet): feerate is an optional feerate to use. It ...
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21 views

What is lnprototest exactly? Can it be used to test an individual Lightning implementation or just interoperability between implementations?

What is lnprototest exactly? Can it be used to test an individual Lightning implementation or just interoperability between implementations? What does an implementation need to do to use lnprototest?
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563 views

Can a channel be closed while the funding tx is still stuck in the mempool?

I have attempted to open a channel recently, but accidentally set the fee for the funding transaction too low. Now the funding tx has been stuck in the mempool for over a week. Is there some way to ...
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1answer
30 views

Pay private bolt11 via sendpay

I need to get fee, before send payment. BOLT11: root@855e20daeae9:/# lightning-cli --testnet decodepay ...
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1answer
49 views

How can I determine the reason for a failed routing on c-lightning

I am running a c-lightning node (v0.8.2). I am routing a payment every few days. However, I realized that dozens of payments every day fail, many of them fail locally (I see the status 'local_failed' ...
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45 views

Preparing a transaction with many outpts

What would be the exact command to prepare a transaction with multiple outputs, to a specific address? I'm able to list all my outputs with lightning-cli listfunds, but I'm not sure how to include ...
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1answer
52 views

How to get a full view of the lightning network with c-lightning?

As I understand lightning a node should in principle have a complete view of the lightning network graph (i.e., all nodes and channels). However, I also understand that for practical reasons the view ...
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1answer
17 views

Why does my freshly installed lightningd not show funds that I transferred to it?

I have a box with Ubuntu, bitcoin: fully indexed, and c-lightning. I made several new addresses, and put money into one of them. The money was transferred to it in block 655761. I see the bech32 ...
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1answer
39 views

Is there a lightningd equivalent to bitcoind's -walletnotify or -blocknotify?

I'm looking at the docs, and I see they have lightning-notifications, but it looks like you can't configure where they go, and you can't trigger a shell script with them. Does this mean I have to have ...
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1answer
88 views

What are the different types of spam that the Lightning Network is subject to?

What are the different types of spam that the Lightning Network is subject to and what are the possible strategies for dealing with such spam?
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84 views

Connect C-lightning to a remote bitcoind through tor

I would like to connect my C-lightning node to a remote Bitcoin node, in order to be able to run lightningd on a small storage capacity VPS. I could achieve this by using clearnet connection and ...
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1answer
61 views

Cannot start C-lightning after reboot

I have problems starting up C-lightning's lightningd on Debian Buster under vagrant. Steps I followed: Fresh install bitcoind Install lightningd Run rpc commands - all good. Reboot system Get the ...
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100 views

Cheat Lightning network (c-lightning)

I want to understand how cheat lightning network using c-lightning. I understand that if a participant of che channel send not last commitment transaction, it means that he tries to cheat. I'd like to ...
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1answer
23 views

Simulate HTLC in regtest c-lightning

I have three nodes in regtest environment l1, l2, and l3 l1 create a channel with l2 l2 create a channel with l3 l3 create an invoice for l1. l1 can pays it because use the route l1-l2-l3 I presume ...
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1answer
49 views

Sending lightning payment between TOR lighning nodes, any specific setup required?

I have two c-lightning nodes in different VMs in Qubes OS, both routed through TOR VM. They both can connect to other public nodes and establish channels with them but when I try sending satoshis ...
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148 views

Bitcoin c-lightning node on Synology cannot connect to bitcoind

I'm trying to setup a bitcoin lightning node on my NAS (Synology), following this tutorial: https://bitcoindev.network/running-a-lightning-node-on-synology-nas/ Unfortunately I get the following error ...
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1answer
45 views

Retrieve address when create a channel lightning network

I have two nodes in regtest. the first one is: $ l1-cli getinfo { "id": "02c3f99e70c8da59e428dd119d36c0a1317e5cd85218a760355b5f9b4f822f6109", "alias": "ALICE&...
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1answer
143 views

Get public or private key from address with C-lightning

I'm studying Lightning network and I use c-lightning. I can Get a new address with newaddr method, but I can't find private key. My address is bcrt1qmckts70jsq2u5886lgcq2yn7xjmp97t09zlrg, how can I ...
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1answer
54 views

How can wallet software implement automatic channel management for Lightning Network?

If I'm building a desktop Bitcoin wallet with Lightning support, and I don't want the user to have to worry about channel management, what's the way to achieve that? I've seen the autopilot solutions ...
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1answer
229 views

My lightning node is unreachable and lightning-rpc': Connection refused

I'm trying to use c-lightning on my raspberry. When start the lightning daemon I get two errors: the first one is: 2020-06-05T17:02:08.784Z DEBUG connectd: Failed to connect 10 socket: Network is ...
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1answer
43 views

Run lightning-charge on c-lightning regtest

I'm trying to run lighting-charge (https://github.com/ElementsProject/lightning-charge) on top of one of my 2 lightning (https://github.com/ElementsProject/lightning) instances. I am running 2 nodes ...
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2answers
67 views

c-lightning channel announcement/establishment issue

I've been running a c-lightning node over Tor with 2 open channel for a few months and it still hasn't forwarded any payment. Maybe it's normal due to the low amount of liquidity provided by my node, ...
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33 views

Exact syntax for lightning-cli txprepare

I have tried many different forms but I cannot prepare a transaction with lightning-cli txprepare from the Linux prompt. lightning-cli txprepare [{\"bc1qvzr0mwps952d0cdmchyd2pe5rlee5tfces5dzf\":\"all\...
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2answers
146 views

c-lightning node backup-restore

How do I restore a c-lightning node from a backed up hsm_secret ? I have tried running lightningd by replacing the generated hsm_secret with the backed-up one. It shows no output and no channel. How ...
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1answer
66 views

c-lightning missing outputs

A few days ago I did a submarine swap in order to rebalance a channel of mine. I opted to be refunded on-chain using a brand-new address generated with c-lightning newaddr command. I used the p2sh ...
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2answers
324 views

Lightning Node High Availability/High Throughput

Are there any resources/best practises on running a highly available/high throughput lightning node? If my lightning service where to take off, should I be running multiple lightning nodes or a single ...
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1answer
53 views

“private” agreement between two c-lightning nodes on channel closure fee

When i was at LNConf, one of the devs of c-lightning (IIRC) told me that there is a custom, manual way to agree between two nodes on channel closing fees. Can anyone elaborate how this is possible? I ...
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1answer
97 views

Bidirectional channel opening in c-lightning

With the current version of c-lightning is it possible to open a bidirectional channel funded by both parties? I managed to open a channel with fundchannel command, but that seems to be a ...
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1answer
43 views

Doubt on lightning channel opening

It's 5 days since I opened my first (and unique, for now) lightning channel. Unfortunately it seems that only me have funded the channel while the counterparty didn't, so the channel it's actually a ...
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2answers
130 views

What is the difference between listpeers vs listnodes commands?

In c-lightning implementation, what is the difference between the listpeers and listnodes commands of lightning-cli?
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1answer
104 views

How to securely update and verify C-Lightning release?

Recently, a new version (v0.7.3) of C-Lightning was released. The GitHub page has detailed instructions on how to build the software from source, but does not provide much details as to how to update ...
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1answer
59 views

lightning node data visibility on explorers

I'm trying to set my first c-lightning node with docker-compose using image from https://hub.docker.com/r/elementsproject/lightningd. currently, my node can connect and open channel with other nodes (...
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1answer
176 views

How to capture c-lightining logs?

Where does c-lightning save its debug.log file? I know you can run the lightning daemon with --log-level=debug and access the logs in the terminal. But, I run my node on a remote server and I access ...
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1answer
156 views

Generating Lightning invoice with an optional parameter

I have a question on the command invoice with the optional parameter. I don't understand how to create the invoice with the optional parameter. The c-lighitning documentations do not have an example ...
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1answer
54 views

How create a personal node c-lighting for create a new channel with other node

I want to create my personal node to create a new channel with another personal node, an example my node with URL 12345678@192.164.1.7 I want create a channel with another personal node. I could not ...
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1answer
121 views

How run c-lightning with the local node bitcoin

I have a bitcoin-core-18.0 with on my linux mint, and I don't have downloaded the bitcoin with the ppa but I downloaded the official zip directory on site bitcoin. Now my question is, c-lightning ...
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1answer
75 views

How do I install a second independent C-lightning node on the same machine as one with an already operational node?

I have followed the steps to install a C-lightning node on my Ubuntu machine. I wanted to know if I could install configure and make a second node on the same machine where both could run in tandem?
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1answer
171 views

Setting up and running multiple C-lightning nodes on same machine

I have successfully setup a C-lightning node on ubuntu using the tutorial. The problem I am having is trying to setup a second node that DOESN'T utilize the same .lightning hidden directory to run ...
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1answer
240 views

c-lightning: single tx multi-channel open stuck on CHANNELD_AWAITING_LOCKIN:We've confirmed funding, they haven't yet

I've tried to open multiple Lightning Network channels using a single Bitcoin transaction, with these steps: For every peer in PEERS (n=25) run: lightning-cli connect ${peer} lightning-cli ...
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2answers
435 views

Can I send/receive payments but prevent forwarding payments in Lightning Network?

Say I am using a very computationally constrained device (eg. a sensor) and it uses Lightning Network to send/receive payments. However, being computationally constrained it doesn't want to forward ...
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1answer
667 views

Why is my “spendable_msat” much lower than “msatoshi_to_us”?

Today I was attempting to send a Lightning Network payment via c-lightning, version v0.7.1-64-gbb30104, using a channel I established in 2018. Strangely, my payment kept failing even if the ...
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1answer
405 views

How do I find the nodeid of the node issuing a lightning network invoice?

I recently got an BOLT11 invoice from a store. For example this one: ...
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1answer
67 views

c-lightning - Unknown Peer

I'm trying to create a channel using c-lighting (testnet), but I keep getting an Unknown Peer error message. I used cli/lightning-cli connect which seemed to work fine. I used cli/lightning-cli ...
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2answers
134 views

Is it possible to connect remotely to a c-lightning node with an exposed TCP port?

If you run a c-lightning node with EXPOSE_TCP set to True, it seems to me it should be possible to connect with it remotely, provided that the c-lightning RCP is listening to all incoming traffic. (IP ...
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1answer
288 views

Lightning Network : Pay a Bolt11 Invoice in multiple Payments

Is there a way to pay one Bolt 11 Invoice in multiple payments with Lightning Network? For instance this invoice total amount to pay is 5000 satoshi: ...
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1answer
85 views

invoice amount is 1200000 but I paid 1201035. What is 1035?

I paid the invoice and then I noticed I paid more than the amount of the invoice. 1201035 (I actually paid) - 1200000 (the amount of the invoice) = 1035 (?) My questions are.. What is 1035 satoshi? ...
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132 views

Error pay invoice. Ran out of routes to try after 2 attempts: see paystatus

I wanted to send some satoshis on testnet lightning network but I got "Ran out of routes to try after 2 attempts: see paystatus" error. I have a channel with 02...48 (1ML.com node ALPHA) and created ...
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1answer
46 views

Lightning Network on testnet - listchannels and listnodes returning empty values

I have setup a lightning node on testnet using c-lightning. The lightning-cli getinfo command output: { "id" : "0315a5746114ab9f3e8f0a3f2f73153ef1e4a8fb58daa54fa97c9603dfab989a30", "alias" : "...
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1answer
209 views

What are the 3 arguments called in function SHA256?

void sha256(struct sha256 *sha, const void *p, size_t size) { struct sha256_ctx ctx; sha256_init(&ctx); sha256_update(&ctx, p, size); sha256_done(&ctx, sha); } I'm trying ...
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1answer
208 views

Can I test Lightning on Bitcoin regtest?

I want to do some Lightning experiments, but want to avoid the burden of synchronizing the blockchain (even testnet). Can I experiment with Lightning using regtest? Is there a manual for setting it up?...