7298 #33
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7298 #33
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We'll need to pack feature vectors for route blinding, so we pull the encoding/decoding out into separate functions (currently contained in ChannelType). Though it's more lines of code, we keep most of the ChannelType assertions so that we strictly enforce use of the alias.
This commit adds encoding and decoding for blinded route data blobs. TLV fields such as path_id (which are only used for the final hop) are omitted to minimize the change size.
Co-authored-by: Calvin Zachman <calvin.zachman@protonmail.com>
Add blinding points to update_add_htlc. This TLV will be set for nodes that are relaying payments in blinded routes that are _not_ the introduction node.
This commit adds an optional blinding point to payment descriptors and persists them in our HTLC's extra data. A get/set pattern is used to populate the ExtraData on our disk representation of the HTLC so that callers do not need to worry about the underlying storage detail.
When we have payments inside of a blinded route, we need to know the incoming amount to be able to back-calculate the amount that we need to forward using the forwarding parameters provided in the blinded route encrypted data. This commit adds the payment amount to our DecodeHopIteratorRequest so that it can be threaded down to payment forwarding information creation in later commits.
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