peer: prevent last block height going backwards #1606
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This modifies the UpdateLastBlockHeight function to ensure the new height is after the existing height before updating it in order to prevent it from going backwards so it properly matches the intent of the function which is to report the latest known block height for the peer. Without this change, the value will properly start out at the latest known block height reported by the peer during version negotiation, however, it will be set to lower values when syncing from the peer due to requesting old blocks and blindly updating the height. It also adds a test to ensure proper functionality. This is a backport of decred/dcrd#1747
ShawkiS
approved these changes
Aug 5, 2020
jakesylvestre
approved these changes
Aug 28, 2020
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This modifies the UpdateLastBlockHeight function to ensure the new
height is after the existing height before updating it in order to
prevent it from going backwards so it properly matches the intent of the
function which is to report the latest known block height for the peer.
Without this change, the value will properly start out at the latest
known block height reported by the peer during version negotiation,
however, it will be set to lower values when syncing from the peer due
to requesting old blocks and blindly updating the height.
It also adds a test to ensure proper functionality.
This is a backport of decred/dcrd#1747