Backport v21 !15409: Rollup node: RPCs to query the commitment including a block and the cementation status of a block

Backport !15409 (merged) to v21: Rollup node: RPCs to query the commitment including a block and the cementation status of a block

Commits

• 32f63354 Rollup node: Services encodings for committed/cemented RPC
• 8c47b2ac Rollup node: Helpers to compute comitted/cemented status of a block
• 43983780 Rollup node/Alpha: RPC for committed/cemented status
• 93350a1b Rollup node: backport committed/cemented RPCs to previous protocols
• 43cf9a0e Doc: changelog

Original MR description

What

This MR adds the RPC:

• GET /global/block/<block_id>/committed_status : retrieve if the block block_id's content is committed or cemented or neither

In the negative, the RPC indicates the estimated time at which the block will be committed (resp. cemented).

Why

This is useful to track commitment status of blocks and more particularly messages. For instance using the second RPC, one can estimate the time at which a withdrawal will be executable on L1.

How

By writing two helper functions to compute this information.

Manually testing the MR

The RPCs should return something like :

> curl -s localhost:8998/global/block/head/committed_status | jq
{
  "uncommitted": {
    "commitment_level": 8831262,
    "estimated_commitment_time": "2024-10-31T16:43:05.000-00:00",
    "estimated_cementation_time": "2024-11-14T16:42:55.000-00:00"
  }
}

> curl -s localhost:8998/global/block/8621113/committed_status | jq
{
  "committed": {
    "commitment_hash": "src13yLTnjgXtMJyUdV1hGoV6zTRcw7qo2asMZMpPs8dhUuiTjwHRt",
    "commitment_level": 8621202,
    "first_published_level": 8621205,
    "published_level": 8631070,
    "estimated_cementation_time": "2024-11-02T12:57:22.000-00:00"
  }
}

> curl -s localhost:8998/global/block/8550113/committed_status | jq
{
  "cemented": {
    "commitment_hash": "src147wpcs34QkxkGgDhmT8NTYePtt9j6RUu5biHRxM9b8rx8ycVAd",
    "commitment_level": 8550282,
    "first_published_level": 8550285,
    "published_level": 8563928,
    "blocks_cemented_since_cemented": 39049
  }
}