Migrate from testnet4 to regtest

[machuPikacchuBTC]

Closes #7

This PR:

• migrates from testnet4 to regtest
• adds just recipes for:
  • mining N blocks
  • creating a wallet

We need a wallet in order to generate blocks, so it also includes a setup script to ensure that a wallet exists and we have at least 16 blocks.

[vnprc]

let's remove all these changes to config files in /test

[vnprc]

unless they are necessary, which would really surprise me

[machuPikacchuBTC]

I reset them back to what they were previously 👍

[vnprc]

Not a fan of this as a separate process since it clutters the devenv dashboard. I think you can just call the script from the pool process block similar to how the polling loops work.

[machuPikacchuBTC]

Agreed, that's a better place to put it.

[vnprc]

I tested this change by running rm -rf .devenv/state/bitcoind/regtest and then just up. It works! Awesome!

Before approving this PR I would like to clean up the unnecessary devenv process and get some clarity on whether the 16 blocks are really required. I suspect there is some state being carried over from old runs to new runs.

When I disable the bitcoind setup script it runs but never actually starts mining. I wonder if we can add an error message or something. Not a requirement to approve the PR.

[vnprc]

nice work!