FAQs

[zzzckck]

Q1: Clarification of the snapshots

As BSC will mainly support PBSS & PebbleDB, we will only cover snapshots of PBSS&PebbleDB and ignore snapshot of HashBased&LevelDB here.
This Q&A is based on #348
Currently(2024-03-25) there are 3 different kinds of sources:

• Source-1: Legacy Full Node(~2.4TB)
  Like this: https://pub-c0627345c16f47ab858c9469133073a8.r2.dev/geth-pbss-pebble-20240320.tar.lz4
  state: Only recent 90K blocks, but only the state of the most recent 129(128+1) blocks can be queried through RPC "eth.getStorageAt(...)". The older states are only used for big reorg, which is part of the PBSS design.
  block: Full chain
  receipts: Full chain
  header: Full chain

• Source-2: FullNode(~900GB) & FastNode(~200GB) By 48Club
  About BSC FastNode
  Currently, 48Club provides 2 kinds of snapshot which require less disk volume, as they only save the recent 90K blocks/receipts/headers. And for the 2 kinds of snapshot: 1 is full node with trie node, the other is fast node without trie node.
  48Club FullNode(~900GB):
  state: Only recent 129 blocks. <---- Just confirmed with this. But with --tries-verify-mode=none, state beyond 129 blocks will return missing trie node.
  block: Only recent 90k blocks
  receipts: Only recent 90k blocks
  header: Only recent 90k blocks
  48Club FastNode(~200GB):
  state: Only recent 129 blocks. <----- I'm running a fast node indeed and find this. And most importantly, if the state is not available, RPC won't report an error and returns 0!
  block: Only recent 90k blocks
  receipts: Only recent 90k blocks
  header: Only recent 90k blocks

• Source-3: Erigon Archive Node(~8TB)
  BSC Erigon is maintained by NodeReal in repo: https://github.com/node-real/bsc-erigon/, right now it is the only runnable archive node for BSC.
  state: Full chain
  block: Full chain
  receipts: Full chain
  header: Full chain

Q2: How To Get Hash Based Snapshot

Hash based snapshot has been replaced by PBSS.
The last update for mainnet is on 2024-03-20, check: https://github.com/bnb-chain/bsc-snapshots/pull/345/files
The last update for Testnet is on 2024-03-21, check: https://github.com/bnb-chain/bsc-snapshots/pull/346/files
The download links are not guaranteed and could be broken in the future.

[zhk101]

• 48Club FastNode(~200GB):
  state: Only recent 129 blocks. <----- I'm running a fast node indeed and find this. And most importantly, if the state is not available, RPC won't report an error and returns 0!
  block: Only recent 90k blocks
  receipts: Only recent 90k blocks
  header: Only recent 90k blocks

I assumes these number applies to the current fastnode snapshot which is not using PBSS.
Will this still be the case once they'll switch to PBSS, specifically for block/receipts/header?
I read somewhere that PBSS holds less state but this might affect only the state?

[zzzckck]

• 48Club FastNode(~200GB):
  state: Only recent 129 blocks. <----- I'm running a fast node indeed and find this. And most importantly, if the state is not available, RPC won't report an error and returns 0!
  block: Only recent 90k blocks
  receipts: Only recent 90k blocks
  header: Only recent 90k blocks

I assumes these number applies to the current fastnode snapshot which is not using PBSS. Will this still be the case once they'll switch to PBSS, specifically for block/receipts/header? I read somewhere that PBSS holds less state but this might affect only the state?

It will still be the case for FastNode-PBSS, since FastNode will not contain trie node, which means it is irrelevant to PBSS or HashBased, as it will not keep the trie node.