chain: add testnet4 support #9620

guggero · 2025-03-20T17:09:00Z

Adds testnet4 support to lnd.

Fixes #8966.

Depends on btcsuite/btcwallet#994 and lightninglabs/neutrino#311.

coderabbitai · 2025-03-20T17:09:07Z

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Impa10r · 2025-03-20T21:13:41Z

builds fine, but cannot bootstrap:

2025-03-20 22:09:29.545 [INF] DISC: Attempting to bootstrap with: Authenticated Channel Graph
2025-03-20 22:09:29.547 [ERR] SRVR: Unable to retrieve initial bootstrap peers: no addresses found

don't know if related or not, create followed by getinfo also fails:

~ $ lncli create
Input wallet password:
Confirm password:

Do you have an existing cipher seed mnemonic or extended master root key you want to use?
Enter 'y' to use an existing cipher seed mnemonic, 'x' to use an extended master root key
or 'n' to create a new seed (Enter y/x/n): n

Your cipher seed can optionally be encrypted.
Input your passphrase if you wish to encrypt it (or press enter to proceed without a cipher seed passphrase):

Generating fresh cipher seed...

!!!YOU MUST WRITE DOWN THIS SEED TO BE ABLE TO RESTORE THE WALLET!!!

---------------BEGIN LND CIPHER SEED---------------
 ...
---------------END LND CIPHER SEED-----------------

!!!YOU MUST WRITE DOWN THIS SEED TO BE ABLE TO RESTORE THE WALLET!!!

lnd successfully initialized!
~ $ lncli getinfo
[lncli] rpc error: code = Unknown desc = verification failed: signature mismatch after caveat verification

Roasbeef · 2025-03-20T23:12:28Z

builds fine, but cannot bootstrap:
2025-03-20 22:09:29.547 [ERR] SRVR: Unable to retrieve initial bootstrap peers: no addresses found

So it's an entirely new network. Someone needs to run DNS seed infrastructure for it, but none for the network currently exist at present.

don't know if related or not, create followed by getinfo also fails:

I suspect some code is still using the testnet3 path when it should be using the testnet4 path (or you forgot to set the flag in lncli).

Roasbeef · 2025-03-20T23:13:44Z

chainreg/chainparams.go

@@ -22,6 +22,14 @@ var BitcoinTestNetParams = BitcoinNetParams{
 	CoinType: keychain.CoinTypeTestnet,
 }

+// BitcoinTestNet4Params contains parameters specific to the 4th version of the


We should also update lncli to mention that testnet4 is an option for the --network command.

yep

$ lncli --network=testnet4 getinfo [lncli] could not load global options: unknown network: testnet4

I did add that. Are you sure you re-compiled and installed lncli from the branch?

yes, tried again, now lncli works, but lnd does not create admin.macaroon

~ $ lnd 2025-03-24 21:46:49.302 [WRN] LTND: Config 'dust-threshold' is deprecated, please remove it 2025-03-24 21:46:49.302 [INF] LTND: Version Info rev=d757bb version=0.18.99-beta commit=tor/v1.1.6-109-gd757bb51e debuglevel=production logging=info 2025-03-24 21:46:49.302 [INF] LTND: Network Info rev=d757bb active_chain=Bitcoin network=testnet4 2025-03-24 21:46:49.303 [INF] RPCS: RPC server listening on 0.0.0.0:10009 2025-03-24 21:46:49.335 [INF] RPCS: gRPC proxy started at 127.0.0.1:8080 2025-03-24 21:46:49.336 [INF] LTND: Opening the main database, this might take a few minutes... 2025-03-24 21:46:49.336 [INF] LTND: Opening bbolt database, sync_freelist=false, auto_compact=false 2025-03-24 21:46:49.351 [INF] LTND: Creating local graph and channel state DB instances 2025-03-24 21:46:49.360 [INF] CHDB: Checking for schema update: latest_version=33, db_version=33 2025-03-24 21:46:49.360 [INF] CHDB: Checking for optional update: prune_revocation_log=false, db_version=empty 2025-03-24 21:46:49.360 [INF] LTND: Database(s) now open (time_to_open=24.300106ms)! 2025-03-24 21:46:49.360 [INF] LTND: We're not running within systemd or the service type is not 'notify' 2025-03-24 21:46:49.360 [INF] LTND: Waiting for wallet encryption password. Use `lncli create` to create a wallet, `lncli unlock` to unlock an existing wallet, or `lncli changepassword` to change the password of an existing wallet and unlock it. $ lncli --network=testnet4 getinfo [lncli] could not load global options: unable to read macaroon path (check the network setting!): open /home/vlad/.lnd/data/chain/bitcoin/testnet4/admin.macaroon: no such file or directory $ ls ~/.lnd/data/chain/bitcoin/testnet4 macaroons.db

You need to unlock/create a wallet first.

Confirmed I can interact using lncli on testent4 np.

Roasbeef

LGTM 🏮

tACK

We'll work on standing up DNS infrastructure in the background so nodes can boostrap.

twofaktor · 2025-03-24T23:10:01Z

We'll work on standing up DNS infrastructure in the background so nodes can boostrap.

Will a testnet4 external fee estimator URL, such as https://nodes.lightning.computer/fees/v1/btctestnet4-fee-estimates.json, also be provided ?

Impa10r · 2025-03-26T01:22:25Z

if anyone wants to open a testnet4 channel, do 50/50, or want me to open to them, ping t.me/MiddleWayNode

It will be up 24/7 at 03a17ec2c693c82d7b8d6616dcaf57cbfb0df506045612e08c9580b0c55dda2c1d@72elnf2w7ahgqkwhqfh3pjrxdtwdszpl3bqhly6ipx6agz4sc6kwkfid.onion:9735

Impa10r · 2025-03-26T13:26:50Z

Hi @guggero. lncli reports all errors as "wallet is encrypted":

% lncli openchannel --node_key 030f289f0f931cd33cc3435dc5f5fc2a6a65bb0297327d43e82562aded10df74a7 --fee_rate_ppm 1 --local_amt 5000000
[lncli] wallet is encrypted - please unlock using 'lncli unlock', or set password using 'lncli create' if this is the first time starting lnd

while in the log:

2025-03-26 13:24:03.150 [INF] CHFD: Performing funding tx coin selection using 8626 sat/kw as fee rate
2025-03-26 13:24:03.150 [ERR] RPCS: unable to open channel to NodeKey(030f289f0f931cd33cc3435dc5f5fc2a6a65bb0297327d43e82562aded10df74a7): not enough witness outputs to create funding transaction, need 0.15000000 BTC only have 0 BTC available
2025-03-26 13:24:03.151 [ERR] RPCS: [/lnrpc.Lightning/OpenChannel]: not enough witness outputs to create funding transaction, need 0.15000000 BTC only have 0 BTC available

guggero · 2025-03-26T13:49:29Z

Can you create a new issue please? Might be a bug introduced by #9605.

adambor · 2025-05-10T21:43:25Z

if anyone needs a channel peer on clearnet, feel free to connect and open a channel: 024c6e1edd12f0792d0c1ddda3abc6e2fde6bf89f2848e00cf8d6a58fabb6c3ab6@81.17.102.136:9735

twofaktor · 2025-05-16T17:23:04Z

LGTM 🏮

tACK

We'll work on standing up DNS infrastructure in the background so nodes can boostrap.

We're already on rc5, and the mentioned infrastructure hasn't been implemented yet. Is it planned to be operational by the final version of v0.19.0?

guggero mentioned this pull request Mar 20, 2025

[feature]: testnet4 support #8966

Closed

guggero force-pushed the testnet4 branch from ac05fa9 to d0f49bd Compare March 20, 2025 17:09

Roasbeef reviewed Mar 20, 2025

View reviewed changes

guggero added 3 commits March 24, 2025 11:53

mod: bump btcwallet and neutrino to latest version

e5b9d96

multi: add testnet4 support

0aea482

docs: add release notes

d757bb5

guggero force-pushed the testnet4 branch from d0f49bd to d757bb5 Compare March 24, 2025 16:53

Roasbeef approved these changes Mar 24, 2025

View reviewed changes

Roasbeef merged commit 67d2eac into lightningnetwork:master Mar 24, 2025
34 of 35 checks passed

guggero deleted the testnet4 branch March 25, 2025 13:13

This was referenced Mar 30, 2025

feat: add testnet4 network apotdevin/thunderhub#623

Open

feat: add testnet4 network LN-Zap/lndconnect#32

Open

Impa10r mentioned this pull request Apr 3, 2025

Add testnet4 support ElementsProject/peerswap#369

Merged

chain: add testnet4 support #9620

chain: add testnet4 support #9620

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