[EPIC]: Local DA Testing

[Manav-Aggarwal]

• Mock network tracking issues  #6 (comment)
• DA uptime should be configurable based on block height, how much time we want to simulate downtime. Make it randomized. Simulate DA node restarts, network connection lost, or crashes.
• Mempool congestion
  • tx size is too big
    • depends on size of other mempool blobs
  • Resolves with retries
    • improvement - gradually scale back blob size
      • ask node team
• Insufficient fees
  • Retries with pending blocks
• Context deadline exceeded
  • DA lag time
    • delay response time of the DA layer to the client
    • scenario → DA light node is still syncing
      • check if DA returns a specific error or just lags
• Randomize the order of GetIDs
  • go-da interface returns ids of all blobs at given height
    • we want to handle node returning a non-deterministic list of ids
    • submitted list might be different from retrieve
      • because maps are not determinstic in go
      • might be because of celestia-da
• Check if node has error codes and handle them
• Should mock namespace to allow testing code paths that depend on no blob for given namespace