Macro get_payment_preimage_hash

macro_rules! get_payment_preimage_hash {
    ($dest_node: expr) => { ... };
    ($dest_node: expr, $min_value_msat: expr) => { ... };
    ($dest_node: expr, $min_value_msat: expr, $min_final_cltv_expiry_delta: expr) => { ... };
}

Get a payment preimage and hash.

Don’t use this, use the identically-named function instead.