feat(sdk): implement sendMessage

feat: implement getMessageStatus

Version Packages

Develop -> Master PR

Update README.md

l2geth: fix nonce issue

chore(deps): bump node-fetch from 2.6.1 to 2.6.7

proxyd: Allow cached RPC keys to be evicted

go/proxyd: Add additional itests for cache, changeset

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) from 2.6.1 to 2.6.7.
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](https://github.com/node-fetch/node-fetch/compare/v2.6.1...v2.6.7)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: direct:production
...
Signed-off-by: dependabot[bot] <support@github.com>

go/batch-submitter: Add releases for go BSS

feat(sdk): implement L2 message gas estimation

maintenance: clean up typings in core utils

maintenance: improved docstrings for BCFG

l2geth: better error message for proxying user txs

This commit adds a better error message when there
is an error for proxying user requests to the sequencer.
This allows the change to be relatively backwards compatible
as a good error message is returned when the sequencer url
is not configured.

Enforced import ordering in eslint

go/proxyd: Properly handle null results

Both the `Error` and `Result` fields on `RPCRes` had `omitempty` tags, so null results were being swallowed. We didn't catch this in integration tests because JavaScript tolerates missing keys. This is now fixed by using a custom JSON marshaler.

Fixes #2049

l2geth: Add commands to initialize from a URL, and dump the current chainstate

This PR adds two commands to l2geth:

- `geth init <url> <genesisHash>`, which will download a remote genesis JSON file, compare its hash to the one specified on the CLI, then reinitialize the chain config.
- `geth dump-chain-cfg`, which will dump the current chain config to stdout.

These commands will make it easier for us to adopt the upcoming gas schedule hardfork.

Fixes: ENG-1906