I have an active channel with bitstamp with a balance on my side. Bitstamp has an active channel with advanced lighting users (lpu) with balance at its side (I checked with lncli queryroutes 0331f80652fb840239df8dc99205792bba2e559a05469915804c08420230e23c7c 70000) Lpu has a channel with me with a balance on his part (I used his service to rent incoming liquidity).
Now, since I rented liquidity from lpu only for a couple of days, I will soon lose incoming liquidity. I want to send a payment like this: me -> bitstamp -> lpu -> me. This will result in maintaining some incoming liquidity (in my channel with bitstamp) after lpu closes our channel.
I guess I need to use lncli sendtoroute to send payment for a specific route. For this, I need a payment hash and a route. I generated a payment hash with lncli addinvoice 70000 and I copied the value r_hash. I tried to generate a route with lncli queryroutes 0364f45ee43cd4b1d6db08972dfd6ab227e47adccee80ca7d76ae0bd107334c2aa 70000 (that's my pub_key) but I received the error "can't find a route to the destination".
First question: Is there any way to get the best route for me with queryroutes?
Then I tried to build the queryroutes answer by myself. I found a route with 3 jumps and tried to reverse engineer how the rates work. It seems that only the recipient charges a fee in hops. So, the first jump is from me to bitstamp (bitstamp charges a fee), the second jump is from bitstamp to lpu (lpu charges a fee), the last jump is from lpu to me (I don't charge a fee).
Second question: Is the above rate logic correct?
Ok, with all that data I generated the queryroutes response below
{
"routes": (
{
"total_time_lock": 590112,
"total_fees": "373",
"total_amt": "70373",
"hops": (
{
"chan_id": "648038959352250368",
"chan_capacity": "100000",
"amt_to_forward": "70373",
"fee": "0",
"expiry": 590072,
"amt_to_forward_msat": "70373500",
"fee_msat": "70",
"pub_key": "02a04446caa81636d60d63b066f2814cbd3a6b5c258e3172cbdded7a16e2cfff4c"
},
{
"chan_id": "630596306830950400",
"chan_capacity": "2500000",
"amt_to_forward": "70360",
"fee": "360",
"expiry": 589928,
"amt_to_forward_msat": "70360000",
"fee_msat": "13500",
"pub_key": "0331f80652fb840239df8dc99205792bba2e559a05469915804c08420230e23c7c"
},
{
"chan_id": "648098333019668480",
"chan_capacity": "500000",
"amt_to_forward": "70000",
"fee": "360",
"expiry": 589928,
"amt_to_forward_msat": "70000000",
"fee_msat": "360000",
"pub_key": "0364f45ee43cd4b1d6db08972dfd6ab227e47adccee80ca7d76ae0bd107334c2aa"
}
),
"total_fees_msat": "373570",
"total_amt_msat": "70373570"
}
)
}
Then I try to send this with cat my.route | lncli sendtoroute --pay_hash=hashIgenerated - and get a "payment_error": "FeeInsufficient... error.
How should I build the routes for this to work?
