c-lightning testnet

version

• c-lightning
  • commit: 74a444eb7aa29ffca693a3ae5fed43dfdcc722e0
• 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 c-lightning and ptarmigan.

Steps

Let’s create a channel

1. [btc] Edit ~/.bitcoin/bitcoin.conf

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

1. [btc] Running bitcoind

bitcoind -daemon

1. [btc] Waiting for synchronization

2. [ptarmigan] Running ptarmd

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

1. [c-lightning] Running c-lightning

• Remove old DB

rm -rf ~/.lightning

• Running c-lightning

./lightningd/lightningd --network=testnet

1. [c-lightning] Getting node_id

./cli/lightning-cli 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 one block.

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 –> c-lightning

1. [c-lightning] Generating an invoice

./cli/lightning-cli invoice 100000000 abc def

• A unit is msatoshi.
  • 100000000 msat = 1 mBTC
  • You don’t need to be concerned about “abc” or “def”.
• We can get its result in JSON format.
  • Invoice to use this time is "bolt11".

1. [ptarmigan] Sending payment

../ptarmcli -r <BOLT11 invoice>

1. [ptarmigan] Confirming the amount after running it

../showdb -w | jq

c-lightning –> ptarmigan

1. [ptarmigan] Cenerating an invoice

../ptarmcli -i 20000

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

1. [c-lightning] Sending payment

./cli/lightning-cli pay <BOLT11 invoice>

1. [c-lightning] Confirming the amount after running it

./cli/lightning-cli listpeers | jq