We should add back in checkpoints for the Xaya chain. This is non-trivial, though, as we need to store more data with them to support Xaya's continuous difficulty update. So probably each checkpoint should store the block hash, the chainwork up to that point, and the algo, timestamp and bits of the last 24 blocks for each algorithm.
We should add back in checkpoints for the Xaya chain. This is non-trivial, though, as we need to store more data with them to support Xaya's continuous difficulty update. So probably each checkpoint should store the block hash, the chainwork up to that point, and the algo, timestamp and bits of the last 24 blocks for each algorithm.