Define genesis params

[liamsi]

Summary

We currently use the default params of most modules. We should settle on which params we want to launch with.

Problem Definition

The defaults might not be the best choices for Celestia. Also, changing a param might cause more friction if they are not modifiable via governance (see: #168).

Proposal

Decide on each parameter.

Most important ones include inflation, token name, max validators at launch. An non-exhaustive list can be found here:
https://github.com/gavinly/CosmosParametersWiki/blob/master/param_index.md

Most of the parameters are now also described in the docs of each module as well (example: https://github.com/cosmos/cosmos-sdk/blob/master/x/staking/spec/08_params.md).

While the genesis params could also be defined in the networks repository before launch, I would suggest discussing the parameters in here and maybe have a genesis file (with these decided on parama) we can use as a basis too.

While this could wait until launch, I suggest to prioritize this to have the next testnet with params as close as possible to the launch params.

[evan-forbes]

pushing this to the onsite, but we still need to do an initial investigation.

[evan-forbes]

We are moving the code to change the defaults the to the application per discussion in celestiaorg/cosmos-sdk#285

[evan-forbes]

marking as completed