Log a message with the height when we get duplicate blocks.
Downgrade some verifier errors and warnings to info and debug, because
some peers on mainnet consistently provide bad blocks.
Reduce the amount of time that the block verifier waits for the previous
block, before polling again.
(Waiting for 2 seconds resulted in some apparent block verifier hangs.)
This is a temporary fix, until the state layer handles context checks.
We can use this network upgrade to implement different consensus rules
and chain context handling for genesis blocks.
Part of the chain state design in #682.
* make zebra-checkpoints
* fix LOOKAHEAD_LIMIT scope
* add a default cli path
* change doc usage text
* add tracing
* move MAX_CHECKPOINT_HEIGHT_GAP to zebra-consensus
* do byte_reverse_hex in a map
* Add checkpoint list generation scripts
* Limit the checkpoint block data size
* Limit the checkpoint height gap
* Add Mainnet and Testnet checkpoint lists
* Parse hard-coded checkpoint lists
The lists were generated using the following limits:
- 256 MB spacing, based on block byte size, and
- 2000 blocks.
* Add MIN and MAX for BlockHeight and LockTime
* Remove duplicate test cases
* fix a comment about the minimum lock time
The minimum LockTime::Time is 5 November 1985 00:53:20 UTC, so the first
day that only contains valid times is 6 November 1985 (in all timezones).
Similarly, the maximum LockTime::Time is 7 February 2106 06::28::15 UTC,
so the last day that only contains valid times in all time zones is
5 February 2106.
* fix: Reject checkpoint lists with bad hashes or heights
Reject the all-zeroes hash, because it is the parent hash of the genesis
block, and should never appear in a checkpoint list.
Reject checkpoint heights that are greater than the maximum block
height.
* fix: Resist CheckpointVerifier memory DoS attacks
Allow a maximum of 2 queued blocks at each height, as a tradeoff between
efficient bad block rejection, and memory usage.
Closes#628.
* fix: Make max queued blocks at height equal to fanout
* fix: Just allocate all the capacity upfront
* fix: Use with_capacity(1) and reserve_exact(1)
teor
Henry de Valence
Alfredo Garcia
Jane Lusby