macro_rules! expect_payment_sent { ($node: expr, $expected_payment_preimage: expr) => { ... }; ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr) => { ... }; ($node: expr, $expected_payment_preimage: expr, $expected_fee_msat_opt: expr, $expect_paths: expr) => { ... }; }