askrene: deprecate auto.no_mpp_support layer, use maxparts=1 instead#8998
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ThomsenDrake wants to merge 1 commit intoElementsProject:masterfrom
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askrene: deprecate auto.no_mpp_support layer, use maxparts=1 instead#8998ThomsenDrake wants to merge 1 commit intoElementsProject:masterfrom
ThomsenDrake wants to merge 1 commit intoElementsProject:masterfrom
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The auto.no_mpp_support layer was used to force single-path payments for destinations that don't support MPP. Since maxparts=1 already switches to the single-path algorithm, the layer is redundant. Changes: - askrene: remove remove_small_channel_layer() and auto.no_mpp_support handling from layer validation, creation, and algorithm override - xpay: when disable_mpp is set, send maxparts=1 to getroutes instead of adding the auto.no_mpp_support layer - tests: update test_getroutes_single_path, test_excessive_fee_cost, and test_impossible_payment to use maxparts=1 instead of the layer - docs: update getroutes.json to describe three automatic layers and point to maxparts=1 for single-path payments Fixes ElementsProject#8871
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The
auto.no_mpp_supportlayer was used to force single-path payments for destinations that don't support MPP. Sincemaxparts=1already switches to the single-path algorithm (line ~616 in askrene.c), the layer is redundant.Changes
plugins/askrene/askrene.c (net -44 lines):
remove_small_channel_layer()function entirelyauto.no_mpp_supportfrom layer name validationauto.no_mpp_supportbranch from layer creation/handlingplugins/xpay/xpay.c (+3/-2):
disable_mppis set (invoice doesn't offer OPT_BASIC_MPP), sendmaxparts=1to getroutes instead of adding theauto.no_mpp_supportlayertests/test_askrene.py (6 test calls updated):
layers=["auto.no_mpp_support"]withmaxparts=1intest_getroutes_single_path,test_excessive_fee_cost, andtest_impossible_paymentmaxpartsparameter support tocheck_getroute_paths()helperdoc/schemas/getroutes.json:
maxparts=1should be used for single-path payments instead of a layerFixes #8871