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setup_lwk.md

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Setup lwk

Liquid Wallet Kit is a collection of Rust crates for Liquid Wallets and is used for PeerSwap L-BTC swaps.
To set up lwk for PeerSwap, follow the steps here.
lwk is currently under development and changes are being made.
peerswap has been tested only with cli_0.5.1.

wallet

peerswap assumes a wallet with blinding-key set in singlesig to lwk.

MNEMONIC=$(lwk_cli signer generate | jq -r .mnemonic)
lwk_cli signer load-software --mnemonic "$MNEMONIC" --signer <signer_name>
DESCRIPTOR=$(lwk_cli signer singlesig-desc --signer <signer_name> --descriptor-blinding-key slip77 --kind wpkh | jq -r .descriptor)
lwk_cli wallet load --wallet <wallet_name> -d "$DESCRIPTOR"

Below is an example of an appropriate descriptor. Confidential Transactions with SLIP-0077, P2WPKH output with the specified xpub.

"ct(slip77(220b6575205a476aac5a8c09f497ab084c13c269a7345846e617698f9beda171),elwpkh([4cd32cc8/84h/1h/0h]tpubDDbFo41vfUWdQMSjEjYVBNgEamvzpJWWqLspuDvStJyaCXC1EKxGyvABFCbax3k5adihtmWakYokMMWV67rZMjLjSuMnHSxKmZS92gKwbNw/<0;1>/*))"

server

peerswap uses lwk's json rpc, so you need to start lwk's server.
Follow lwk's document to start the server.

lwk_cli server start

electrum

peerswap uses esplora-electrs to communicate with the luqiud chain.
By default, peerswap connects to blockstream.info:995 used by lwk, so no configuration is needed.

If you want to use your own chain, follow the instructions in esplora-electrs to start Electrum JSON-RPC server.

config file

The following settings are available

  • wallet name
  • signer name
  • lwk endpoint : lwk jsonrpc endpoint
  • electrumEndpoint : electrum JSON-RPC serverのendpoint
  • network : liquid, liquid-testnet, liquid-regtest
  • liquidSwaps : true if used

Set up in INI (.ini) File Format for lnd and in toml format for cln

example

Example configuration in lnd

lwk.signername=signername
lwk.walletname=walletname
lwk.network=liquid
lwk.liquidswaps=true

Example configuration in cln

[LWK]
signername="signername"
walletname="walletname"
network="liquid"
liquidswaps=true