These are the steps that i’m using to build

  1. git pull main from bitcoin
  2. brew install cmake boost pkgconf libevent
  3. oh wait… let’s see first if we need to do this. perhaps bitcoin’s working already

okay, so i ended up not needing to do this…

my major need was to connect with LND to my Bitcoind to perform RPC commands. i had previously installed a prebuilt version of bitcoin in order to start the project. so i got LND installed, and pointed it towards my bitcoind and after a couple hours of not following the directions, i finally got it to work.

here’s what a LND command to build a route looks like (notice the hops are in a comma-separated string array with no spaces). this route is like:

(my node) -- [hop1] --> (node 3: ...f3f5) --[hop2]--> (node 2: ...017d)

lncli --macaroonpath '~/Library/Application Support/Lnd/data/chain/bitcoin/signet/admin.macaroon' \
buildroute \
 --hops "02ef09cab9ba578cfa5158d6951148a276cbb005bba5d61b8f630b75769d8df3f5,03ebc7280ff486f94cee51cff45a0fc521e9fe2560c02563ab191552fa90d4017d" \
 --payment_addr 37a931abbe5d6c7def93faa72dff676252cd34303d85bafbb803b614001bfba1 \
 --amt 2342 \
 --final_cltv_delta=80

here’s what a LND route object looks like:


{
    "route": {
        "total_time_lock": 6931,
        "total_fees": "1",
        "total_amt": "2343",
        "hops": [
            {
                "chan_id": "7404111301509120",
                "chan_capacity": "50000",
                "amt_to_forward": "2342",
                "fee": "1",
                "expiry": 6851,
                "amt_to_forward_msat": "2342000",
                "fee_msat": "1002",
                "pub_key": "02ef09cab9ba578cfa5158d6951148a276cbb005bba5d61b8f630b75769d8df3f5",
                "tlv_payload": true,
                "mpp_record": null,
                "amp_record": null,
                "custom_records": {},
                "metadata": "",
                "blinding_point": "",
                "encrypted_data": "",
                "total_amt_msat": "0"
            },
            {
                "chan_id": "6102289534222336",
                "chan_capacity": "100000000",
                "amt_to_forward": "2342",
                "fee": "0",
                "expiry": 6851,
                "amt_to_forward_msat": "2342000",
                "fee_msat": "0",
                "pub_key": "03ebc7280ff486f94cee51cff45a0fc521e9fe2560c02563ab191552fa90d4017d",
                "tlv_payload": true,
                "mpp_record": {
                    "payment_addr": "37a931abbe5d6c7def93faa72dff676252cd34303d85bafbb803b614001bfba1",
                    "total_amt_msat": "2342000"
                },
                "amp_record": null,
                "custom_records": {},
                "metadata": "",
                "blinding_point": "",
                "encrypted_data": "",
                "total_amt_msat": "0"
            }
        ],
        "total_fees_msat": "1002",
        "total_amt_msat": "2343002",
        "first_hop_amount_msat": "0",
        "custom_channel_data": ""
    }
}

lastly, here a command to send a payment across that route:

lncli --macaroonpath '~/Library/Application Support/Lnd/data/chain/bitcoin/signet/admin.macaroon' \
sendtoroute --payment_hash f874571681b44ee3f0e525264c9b8a573b545295b2f556a8dd63fbed44ffb9b7 - < route.json