Let's talk about sharding:
Cross-shard transactions need to pass messages between different shards to coordinate completion, and are generally more complex and slower than transactions within the same shard.
The challenge with sharding is security: each shard is handled by only a subset of validators, making it easier for attackers to concentrate their forces on a particular shard than to attack the entire chain.
$NEAR 5.004（+1.46%）
Cross-shard transactions need to pass messages between different shards to coordinate completion, and are generally more complex and slower than transactions within the same shard.
The challenge with sharding is security: each shard is handled by only a subset of validators, making it easier for attackers to concentrate their forces on a particular shard than to attack the entire chain.
$NEAR 5.004（+1.46%）