Use onion amount in MPP set calculation#1040
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t-bast merged 2 commits intolightning:masterfrom Nov 22, 2022
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The sender chooses the amounts that are set in the onion payload (`amt_to_forward`) but cannot predict what amounts will be set in the HTLCs (`amount_msat`) since intermediate nodes are allowed to overpay.
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joostjager
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Nov 18, 2022
These requirements were missed when integrating lightning#1032
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ACK |
TheBlueMatt
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Nov 21, 2022
carlaKC
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Nov 21, 2022
halseth
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Nov 22, 2022
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halseth
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As mentioned during the call, this was discussed earlier: #1032 (comment). The conclusion then was that the change was not strictly needed (sender should always be able to handle a premature preimage release).
But I'm for it, this makes it simpler to reason about, and gives routing nodes less room to play around with the settlement.
ACK
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Right, thanks for the link! I only focused on the |
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The sender chooses the amounts that are set in the onion payload (
amt_to_forward) but cannot predict what amounts will be set in the HTLCs (amount_msat) since intermediate nodes are allowed to overpay.This was pointed out by @joostjager here.