Centralized Signed Blobs

[l-monninger]

Summary

• RFCs: MD-6
• Categories: protocol-units
• Issues: Centralized Blob Signer Validation #563

Implements trusted-only blob reading and writing with the following:

• Signs blocks sent to DA.
• Checks signature on block was made by well-known signers.
• Moves compression and decompression of blobs for Celestia down into DA.

Testing

1. e2e tests confirm Suzuka Behavior is unchanged.
2. Unit tests for formatting and basic verification included.

Outstanding issues

1. Lots of potential for unit tests here.
2. Though this is using secp256k1, the key serialization and deserialization format is not yet compatible with ETH hex encoding: Permissioned Signers Private and Public Key Format Should Match ETH #710
3. There should probably be an e2e test for a malicious signer that is ignored: Include e2e tests covering malicious signer to ensure permissioned signer controls are always checked #711

[Primata]

Not sure if I could be of much help to evaluate code.