Use `BestBlock` for chain state serialization (and somewhat parallelize init)#4266

Draft

TheBlueMatt wants to merge 22 commits intolightningdevkit:mainfrom

TheBlueMatt:2025-10-reorg-blocksource-swap

Commits on Nov 10, 2025

Commits on Dec 8, 2025

Update BestBlock to store ANTI_REORG_DELAY * 2 recent block hashes
TheBlueMatt
committed
Return `BestBlock` when deserializing chain-synced structs
TheBlueMatt
committed
Replace `Cache::block_disconnected` with `blocks_disconnected`

Matt Corallo
authored and
TheBlueMatt
committed
Pass a `BestBlock` to `init::synchronize_listeners`

Matt Corallo
authored and
TheBlueMatt
committed
Make the `Cache` trait priv, just use `UnboundedCache` publicly

Matt Corallo
authored and
TheBlueMatt
committed
Make `UnboundedCache` bounded

Matt Corallo
authored and
TheBlueMatt
committed
Consolidate all the pub aync utils to `native_async`
TheBlueMatt
committed
Add `async_poll.rs` to `lightning-block-sync`
TheBlueMatt
committed
Fetch blocks from source in parallel during initial sync
TheBlueMatt
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Silence "elided lifetime has a name" warnings in no-std locking
TheBlueMatt
committed
Use the header cache across listeners during initial disconnect
TheBlueMatt
committed