feat: blocks backup / restore

[n0izn0iz]

Fixes #1827

WIP

Help needed

Do you know how I could verify and save a block without the next block LastCommit?
Or should I try to add the end+1 block LastCommit to backup?

Description

• Adds a grpc service called Backup in the tendermint2 node that allows to stream blocks efficiently
  It has a single method StreamBlocks that take a start and end height. If end height is 0 it will stream to the latest height. It is disabled by default and require enabling it in the config.toml
• Adds a contribs binary named tm2backup that pulls blocks from the backup service and store them in compressed 100-blocks files. It takes a start and end height as well as supporting resuming.
  The tar format was chosen to bundle blocks since it's widely supported and efficient. The zstandard format was chosen for compression because it's fast, has a good compression ratio and is widely supported.
• Adds a restore subcommand to the gnoland binary that allows to replay blocks from a backup. It takes the options from the start subcommand as well as the backup directory and an optional end height.
  It will start at the current current node height + 1.

The restore command can only restore at backupEndHeight-1 because I did not figure a way to commit block n without block n+1. I'd gladly take ideas on how to do that. (See Help needed)

The backup is fast enough for now IMO (< 20min for test5 on my macbook) but can be optimized because it's not parallelized.
The restore bottleneck seems to be the gnovm currently but I would need to profile to be sure.

How to create a backup

• Enable the backup service in your node's config.toml

  [backup]
  
  laddr = "localhost:4242"
• (Re-)Start your node
• Run the tm2backup command

  cd contribs/tm2backup
  tm2backup-o blocks-backup -remote http://localhost:4242
  Example output:

  (...)

  

How to create a node from a backup

• Get the genesis file, for example:

  wget https://example.com/genesis.json
• Run the restore command

  gnoland restore --lazy --backup-dir ../contribs/tm2backup/blocks-backup
• Start your node

  gnoland start
  

TODO

• blocks streaming grpc service
• 100 blocks files generation command
• restore command
• find a way to restore up to backup height if possible
• tests

[Gno2D2]

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[codecov]

Codecov Report

Attention: Patch coverage is 24.88038% with 157 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
tm2/pkg/bft/backup/backup_svc.go	5.12%	37 Missing ⚠️
tm2/pkg/bft/blockchain/reactor.go	0.00%	36 Missing ⚠️
.../backup/backuppb/backuppbconnect/backup.connect.go	0.00%	29 Missing ⚠️
gno.land/cmd/gnoland/start.go	46.34%	18 Missing and 4 partials ⚠️
gno.land/cmd/gnoland/restore.go	58.69%	18 Missing and 1 partial ⚠️
tm2/pkg/bft/node/node.go	12.50%	12 Missing and 2 partials ⚠️

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