Inter-neighborhood messaging PoC

[tysloan]

Description: The goal is to create a basic PoC execution environment. Meant for demo purposes, no way a performant, secure, or bug-free PoC. Expected to work with exact script provided. Expands on previous execution work. Will live in many-rs for simplicity. Scope of the is that the PoC will be able to communicate from Blockchain to non-Blockchain. We could use delegation between the neighborhood's key and its nodes for message signing. PoC will be ledger calling out to another neighborhood.

• [x] Should allow communication from blockchain to non-blockchain neighborhoods.
• [x] Should have the capability to call other networks.
• [x] Should be able to sign the message as a neighborhood.
• [x] Not meant to be secure, just PoC. Can be thrown out afterwards and rebuilt properly.
• [x] Should be demoed.

Notes:

• Need to come up with a high-level design.

• Main problem - currently we don't have a single key for a neighborhood. Several come back.

• Should generate a new public key and sign a message.

• Delegation could be an alternative that could be explored - but it can be 'cheated'.

• What goes into sending messages?

• Who signs the request?

• Needs to be compatible with our installation of Tendermint.

• Could a cronjob on the network be useful for a PoC?

• Tie inter-neighborhood messaging to dWeb hosting. Web serving.

• Work together for it. Blockchain element and inter-generational.

• Kvstore. Send them here and serve them that.

[fmorency]

Some difficulties were encountered, not going to be finished for Sprint 7.