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blip2: add advisory for invoice feature bit maximum #24

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May 2, 2023
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blip2: add advisory for invoice feature bit maximum #24

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1 change: 1 addition & 0 deletions blip-0002.md
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Expand Up @@ -40,6 +40,7 @@ network split.
Feature bits are specified in [Bolt 9](https://github.com/lightning/bolts/blob/master/09-features.md).
They let nodes publicly advertise that they support or require a given feature.
Feature bits in the `0`-`255` range are reserved for BOLTs: bLIPs must use feature bits above that range.
Custom feature bits used in the `I` [Bolt 11](https://github.com/lightning/bolts/blob/master/11-payment-encoding.md) context must be <= 5114 due to the [size limitations on tagged fields](https://github.com/lightning/bolts/blob/master/11-payment-encoding.md#tagged-fields).

bLIPs may reserve feature bits by adding them to the following table:

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