Optional setting to dip into trampoline relay fees - #3372
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Many service providers (lightning nodes that provide services to mobile wallets that support it) get paid by adding a fee to the routing hints of the end user's invoices: this lets them be paid a fee that may be larger than their usual relay fees when wallet users receive payments. That can compete with the fees collected by intermediate trampoline nodes, so we provide a new setting (disabled by default) that lets trampoline nodes relay payments without collecting their full relay fee. It is up to each trampoline node to decide whether they are ok with having more payments succeed with a smaller per-payment revenue or not.
pm47
reviewed
Aug 28, 2026
Another approach, slightly different from the previous commit, where we instead set a floor for trampoline fees that may be different from our local channel fees when trampoline payments contain a routing hint.
pm47
approved these changes
Sep 11, 2026
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Many service providers (lightning nodes that provide services to mobile wallets that support it) get paid by adding a fee to the routing hints of the end user's invoices: this lets them be paid a fee that may be larger than their usual relay fees when wallet users receive payments.
That can compete with the fees collected by intermediate trampoline nodes, so we provide a new setting (disabled by default) that lets trampoline nodes relay payments without collecting their full relay fee. It is up to each trampoline node to decide whether they are ok with having more payments succeed with a smaller per-payment revenue or not.