NewBlockSyncer returns a new block syncer instance.

NewSlidingWindow returns a SlidingWindow instance.

WithNeighbors is the option to set the neighbors callback.

WithUnicastOutBound is the option to set the unicast callback.

Closed indicates a closed state.

Closing indicates a closing state.

Open indicates an open state.

ErrInvalidRange indicates invalid range.

WindowSize defines the bufferSize of window.

Config represents the config to setup blocksync.

SlidingWindow implements a sliding window.

BlockSync defines the interface of blocksyncer.

Option is the option to override the blocksync config.