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LND Setup

This guide walks through the steps necessary to setup the PeerSwap standalone daemon with LND for mainnet Bitcoin and Liquid swaps.

Install dependencies

PeerSwap requires LND.

For L-BTC swaps, an elementsd installation is required. To setup elementsd for PeerSwap, check our guide.

Install golang from https://golang.org/doc/install

Peerswap

Build

Clone the repository and build PeerSwap

git clone https://github.com/ElementsProject/peerswap.git && \
cd peerswap && \
make lnd-release

This will install peerswapd and pscli to your GOPATH

Config file

In order to get PeerSwap running we need a configuration

mkdir -p ~/.peerswap

Add config file. Replace the paths to the TLS certificate and macaroon file.

For every peer you want to allow swaps with add a line with allowlisted_peers=<REPLACE_WITH_PUBKEY_OF_PEER>

BTC swaps only config:

cat <<EOF > ~/.peerswap/peerswap.conf
lnd.tlscertpath=/home/<username>/.lnd/tls.cert
lnd.macaroonpath=/home/<username>/.lnd/data/chain/bitcoin/mainnet/admin.macaroon
EOF

BTC and L-BTC swaps config. Replace the RPC parameters as needed:

cat <<EOF > ~/.peerswap/peerswap.conf
lnd.tlscertpath=/home/<username>/.lnd/tls.cert
lnd.macaroonpath=/home/<username>/.lnd/data/chain/bitcoin/mainnet/admin.macaroon
elementsd.rpcuser=<REPLACE_ME>
elementsd.rpcpass=<REPLACE_ME>
elementsd.rpchost=http://127.0.0.1 # the http:// is mandatory
elementsd.rpcport=<REPLACE_ME>
elementsd.rpcwallet=peerswap
elementsd.liquidswaps=true # set to false to manually disable L-BTC swaps
EOF

L-BTC only config.

cat <<EOF > ~/.peerswap/peerswap.conf

bitcoinswaps=false # disables BTC swaps
lnd.tlscertpath=/home/<username>/.lnd/tls.cert
lnd.macaroonpath=/home/<username>/.lnd/data/chain/bitcoin/mainnet/admin.macaroon
elementsd.rpcuser=<REPLACE_ME>
elementsd.rpcpass=<REPLACE_ME>
elementsd.rpchost=http://127.0.0.1 # the http:// is mandatory
elementsd.rpcport=<REPLACE_ME>
elementsd.rpcwallet=peerswap
EOF

LWK BTC and L-BTC swaps config. Replace the RPC parameters as needed:

cat <<EOF > ~/.peerswap/peerswap.conf
lnd.tlscertpath=/home/<username>/.lnd/tls.cert
lnd.macaroonpath=/home/<username>/.lnd/data/chain/bitcoin/mainnet/admin.macaroon
lwk.signername=signername
lwk.walletname=walletname
lwk.Network=liquid
lwk.liquidswaps=true
EOF

Policy

On first startup of the plugin a policy file will be generated (default path: ~/.peerswap/policy.conf) in which trusted nodes will be specified. This can be done manually by adding a line with allowlisted_peers=<REPLACE_WITH_PUBKEY_OF_PEER> or with pscli addpeer <PUBKEY>.

Warning
One could set the accept_all_peers=true policy to ignore the allowlist and allow all peers with direct channels to send swap requests.

Run

Start the PeerSwap daemon in background:

peerswapd

In order to check if your daemon is setup correctly run

pscli reloadpolicy