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MPP receive timeout not implemented? #1050

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@t-bast

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@t-bast

I'm testing the latest version of the ldk-sample and I noticed that the receiver MPP timeout mechanism doesn't seem to work.

I sent a partial HTLC to the LDK sample node, it's correctly accepted, but even after 5 minutes without receiving the remaining HTLCs the LDK sample node doesn't fail the incoming HTLC.

I'm referring to the following requirement:

- otherwise, if the total amount_msat of this HTLC set is less than total_msat:
    - MUST fail all HTLCs in the HTLC set after some reasonable timeout.
        - SHOULD wait for at least 60 seconds after the initial HTLC.
        - SHOULD use mpp_timeout for the failure message.

Is that expected?

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