lnd testnet

version

• lnd
  • commit: 45eaa70814e8f94a569bc277c52a79a5c4351c43
• ptarmigan
  • tag: 2018-03-13
  • When ptarmigan version up with DB change is done, you need DB clean(rm -rf db).

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Set up nodes in separate computers

• First, IP adresses are xx.xx.xx.xx and yy.yy.yy.yy respectively for lnd and ptarmigan.

Steps

Let’s create a channel.

1. Running bitcoin node

• [bitcoind] ~/.bitcoin/bitcoin.conf

rpcuser=bitcoinuser
rpcpassword=bitcoinpassword
server=1
txindex=1
testnet=1

• [btcd] ~/.btcd/btcd.conf

testnet=1
txindex=1
rpcuser=nayuta
rpcpass=nayuta

• [btcd] ~/.btcctl/btcctl.conf

rpcuser=nayuta
rpcpass=nayuta

• [lnd] ~/.lnd/lnd.conf

[Application Options]
debughtlc=true
maxpendingchannels=10
no-macaroons=true
debuglevel=trace
nobootstrap=1

[Bitcoin]
bitcoin.active=1
bitcoin.testnet=1
bitcoin.node=btcd

1. Running bitcoind/btcd

bitcoind -daemon

btcd&

1. Waiting for synchronization

2. [ptarmigan] Running ptarmd

cd install
./new_nodedir.sh
cd node
../ptarmd --network=testnet&

1. [lnd] Running lnd

• Remove old DB

rm -rf ~/.lnd/data

• Running lnd

lnd --no-macaroons

• Creating a wallet
  • All you have to do is using lncli --no-macaroons unlock next time.

lncli --no-macaroons create

1. [lnd] Getting node_id

lncli --no-macaroons getinfo

1. [ptarmigan] Creating fund-in transaction

../pay_fundin.py 1000000 0

• Create a channel that sends you 10mBTC and the other person 0.
  • 1000000 (fund-in satoshi) is the amount of money that is sent to an adress before sending payment to the channel.
  • 1000000 (channel satoshi) is the amount of sending payment to the channel.
  • 0 (push msatoshi) is the amount out of channel satoshi to be sent to the other person.
• pay_fundin.py will create a file in fund_yyyymmddhhmmss.conf format.

1. [ptarmigan] Starting Channel Establishment

../ptarmcli -c [PEER NODE_ID]@[IPv4 ADDR]:[PORT]
../ptarmcli -c [PEER NODE_ID] -f fund_yyyymmddhhmmss.conf

1. [btc] Waiting for generating a block

The channel is gererated after reaching three blocks.

When status is established in a result of ptarmcli -l, we can confirm that if the channel is generated.
Combining watch and jq is also available for observing it.

watch -n 10 "../ptarmcli -l | jq '.result.client[].status'"

Now we will move on how to send payment.

ptarmigan –> lnd

1. [lnd] Generating an invoice

lncli --no-macaroons addinvoice --amt 100000

• A unit is msatoshi.
  • 100000 satoshi = 1 mBTC

1. [ptarmigan] Sending payment

../ptarmcli -r <BOLT11 invoice>

1. [ptarmigan] Confirming the amount after running it

../showdb -w | jq

lnd –> ptarmigan

1. [ptarmigan] Cenerating an invoice

../ptarmcli -i 20000

• A unit is msatoshi.
  • 20000 msat = 20 satoshi

1. [lnd] Sending payment

lncli --no-macaroons payinvoice <BOLT11 invoice>

1. [lnd] Confirming the amount after running it

lncli --no-macaroons listchannels