feat: wire in place testnet command

[julienrbrt]

Closes: #251

Fully based on ignite template: https://github.com/ignite/example/blob/master/cmd/exampled/cmd/root.go

[tbruyelle]

Looks like there is some required setup needed for this command to works properly. For example I had to set a value in app.toml min-gas-prices, and also it requires a genesis.json to exists. Do we need the mainnet genesis here ?

[julienrbrt]

Looks like there is some required setup needed for this command to works properly. For example I had to set a value in app.toml min-gas-prices, and also it requires a genesis.json to exists. Do we need the mainnet genesis here ?

Yes, a valid genesis should be used, this is for cometbft to start properly. Any current valid genesis is fine, as the chainID will be overwritten by the command.

[tbruyelle]

It's not as smooth as I had imagined it, after I copied a genesis to the expected folder, I have an other problem:

error reading GenesisDoc at /home/tom/.atomone/validator1/config/genesis.json: invalid 64-bit integer encoding "1", expected string

Suprisingly it expects the initial_heigth to be a string rather than a number... I'm confused... Changing it to string doesnt solve the problem since somehow the process switch back the field to an int ...

[julienrbrt]

It's not as smooth as I had imagined it, after I copied a genesis to the expected folder, I have an other problem:

error reading GenesisDoc at /home/tom/.atomone/validator1/config/genesis.json: invalid 64-bit integer encoding "1", expected string

Suprisingly it expects the initial_heigth to be a string rather than a number... I'm confused... Changing it to string doesnt solve the problem since somehow the process switch back the field to an int ...

Welcome in the differences between AppGenesis and CometBFT genesis :D. Let's fix in our fork and just use the decoding fallback.

Yes this is why in Ignite we had a wrapper making the UX better.

[julienrbrt]

Welcome in the differences between AppGenesis and CometBFT genesis :D. Let's fix in our fork and just use the decoding fallback.

The fallback is already there actually, so both genesis should work 🤔

[tbruyelle]

Now having a panic in the testnetify function because block is nil

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x38 pc=0x1acfae8]

goroutine 1 [running]:
github.com/cosmos/cosmos-sdk/server.testnetify(0xc0031fa0a0, 0x51b8358, {0x56672a0, 0xc001594d40}, {0x0, 0x0})
	/home/tom/gohack/github.com/cosmos/cosmos-sdk/server/start.go:863 +0x17a8
github.com/cosmos/cosmos-sdk/server.startApp(0xc0031fa0a0, 0x51b8358, {0x51b8b40, 0x0, 0x0, 0x0, 0x51b8b50})
	/home/tom/gohack/github.com/cosmos/cosmos-sdk/server/start.go:616 +0x14e
github.com/cosmos/cosmos-sdk/server.start(_, {{0x0, 0x0, 0x0}, {0x566da38, 0xc0013a98f0}, 0x0, {0x0, 0x0}, {0x5683b08, ...}, ...}, ...)
	/home/tom/gohack/github.com/cosmos/cosmos-sdk/server/start.go:227 +0x159