Allow hardcoded spork IDs and liquidity admin address to be configurable

[georgezgeorgez]

Is your feature request related to a problem? Please describe.
HyperCore.One is spinning up a testnet. While existing sporks can be specified in genesis config, we will not be able to create sporks with the same IDs as on mainnet. The initial liquidity admin address is also hardcoded, and we need to be able to configure it.

Describe the solution you'd like
Allow the definition of constant overrides in config.json and make sporkIds and and initial liquidity admin address to look for those overrides before using the existing hardcoded values as defaults.

Describe alternatives you've considered
We could have a custom binary for testnets with tesnet-specific code patches. But this seems inferior in all regards.

Additional context
n/a

[georgezgeorgez]

I have an initial implementation at https://github.com/hypercore-one/go-zenon/tree/feature/configure-hardcoded
It uses a simple map of strings to strings in config.json, and by setting predefined keys, you can override certain behavior
the implementation doesn't scale well right now
and might need some refactoring in the future

[georgezgeorgez]

cryptofish did a quick test on the bridge/liquidity admin override by calling the rpc on the info methods

for the spork id overrides:
just did a test

created a new devnet without the htlc spork id in genesis
created a spork called htlcs
added the following to config.json
Overrides:
HtlcSpork:

activated the spork
successful activation

created a new random spork
and activated (with no implementation / override)
and got failure
the node shut itself down

this should mean that the spork overrides in working

[georgezgeorgez]

Long term I think I have a better solution in mind to put all constants into database state
This would allow for migration scripts including an "init" migration script to seed the initial values

[sol-znn]

Great work, George!
Here's an updated copy of the testnet config.
config.testnet.json.txt