Module zebrad::components::sync

The syncer downloads and verifies large numbers of blocks from peers to Zebra.

It is used when Zebra is a long way behind the current chain tip.

Modules

• end_of_support
  End of support checking task.

Structs

• ChainSync
• Config
  Sync configuration section.
• RecentSyncLengths
  A helper type which holds a list of recent syncer response lengths. These sync lengths can be used to work out if Zebra has reached the end of the chain.
• SyncStatus
  A helper type to determine if the synchronizer has likely reached the chain tip.

Enums

• BlockGossipError
  Errors that can occur when gossiping committed blocks

Constants

• DEFAULT_CHECKPOINT_CONCURRENCY_LIMIT
  The default for the user-specified lookahead limit.
• MAX_TIPS_RESPONSE_HASH_COUNT
  The expected maximum number of hashes in an ObtainTips or ExtendTips response.
• MIN_CHECKPOINT_CONCURRENCY_LIMIT
  A lower bound on the user-specified checkpoint verification concurrency limit.
• MIN_CONCURRENCY_LIMIT
  A lower bound on the user-specified concurrency limit.
• PEER_GOSSIP_DELAY
  Controls how long we wait between gossiping successive blocks or transactions.
• TIPS_RESPONSE_TIMEOUT
  Controls how long we wait for a tips response to return.
• VERIFICATION_PIPELINE_SCALING_MULTIPLIER
  A multiplier used to calculate the extra number of blocks we allow in the verifier, state, and block commit pipelines, on top of the lookahead limit.

Functions

• gossip_best_tip_block_hashes
  Run continuously, gossiping newly verified block::Hashes to peers.
• show_block_chain_progress
  Logs Zebra’s estimated progress towards the chain tip every minute or so, and updates a terminal progress bar every few seconds.