One thing we haven't really thought about yet: LazyLedger (app) messages could potentially become quite large. I'm not sure if the tendermint mempool in its current form will able to cope with these.

We should investigate:

• how well can the tendermint mempool deal with large Tx?
• could Tx gossiping pose any security issue?
• how should we cap the Tx size if it could cause a problem?
• how large do we expect ORU blocks to be that will be posted onto LL? Quoting John:

Just as a ballpark, 1 MB messages should probably a good starting point upper bound I think

Maybe @ValarDragon @marbar3778 have any insights on this.

related: tendermint/tendermint#7918