let (our_payment_preimage, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000);
// Provide preimage to node 2 by claiming payment
let (our_payment_preimage, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000);
// Provide preimage to node 2 by claiming payment