Add config option to set maximum total routing fee#2417

Merged

TheBlueMatt merged 8 commits intolightningdevkit:mainfrom

tnull:2023-07-max-total-fee

Sep 26, 2023

Commits on Sep 26, 2023

Introduce `RouteParameters::max_total_routing_fee_msat`
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Consider `RouteParameters::max_total_routing_fee_msat` in `get_route`
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Test we adhere to `max_total_routing_fee_msat`
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Account for leftover fee budget when retrying `PartialFailure`s
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Account for leftover fee budget when retrying via `check_retry_payment`
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Check `max_total_routing_fee` is reduced in `mpp_retry` test
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Check `max_total_routing_fee` is accounted for in `test_threaded_payment_retries`
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Test `max_total_routing_fee_msat` handling when retrying overpaid paths
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