// Update the fee on the middle hop to ensure PaymentSent events have the correct (retried) fee
// and not the original fee. We also update node[1]'s relevant config as
// do_claim_payment_along_route expects us to never overpay.
// Update the fee on the middle hop to ensure PaymentSent events have the correct (retried) fee
// and not the original fee. We also update node[1]'s relevant config as
// do_claim_payment_along_route expects us to never overpay.