fix: use proper db_backend type when reading chain-id

[k-yang]

Description

Closes: #XXXX

We noticed that after upgrading to cosmos-sdk v0.47.8+, our node panics upon restart. We traced the issue to https://github.com/cosmos/cosmos-sdk/pull/18920/files, which changes the way the node creates DefaultBaseappOptions at startup time.

Specifically, this line assumes that the node uses goleveldb and tries to read the db files in goleveldb format, but our nodes use rocksdb by default.

After a node stop and restart, the node panics with

nibid start
panic: failed to initialize database: EOF

goroutine 24 [running]:
github.com/cosmos/cosmos-sdk/server.DefaultBaseappOptions({0x4551480, 0x4000df9340})
	/home/ubuntu/go/pkg/mod/github.com/cosmos/[email protected]/server/util.go:467 +0x734
github.com/NibiruChain/nibiru/cmd/nibid/cmd.appCreator.newApp({{{0x458c7c0, 0x4000fe0480}, {0x45a4600, 0x4000fe8680}, {0x4594380, 0x4000ef4140}, 0x4000206060}}, {0x457f180, 0x40016cf1f0}, {0x4598438, ...}, ...)
	/home/ubuntu/projects/nibiru/nibiru/cmd/nibid/cmd/root.go:246 +0x64
github.com/cosmos/cosmos-sdk/server.startInProcess(_, {{0x0, 0x0, 0x0}, {0x4598df0, 0x4001664420}, 0x0, {0x4000e214e8, 0x11}, {0x45a4600, ...}, ...}, ...)
	/home/ubuntu/go/pkg/mod/github.com/cosmos/[email protected]/server/start.go:353 +0x31c
github.com/cosmos/cosmos-sdk/server.StartCmd.func2.2()
	/home/ubuntu/go/pkg/mod/github.com/cosmos/[email protected]/server/start.go:153 +0x48
github.com/cosmos/cosmos-sdk/server.wrapCPUProfile.func2()
	/home/ubuntu/go/pkg/mod/github.com/cosmos/[email protected]/server/start.go:617 +0x30
created by github.com/cosmos/cosmos-sdk/server.wrapCPUProfile in goroutine 1
	/home/ubuntu/go/pkg/mod/github.com/cosmos/[email protected]/server/start.go:616 +0x1d0

The fix is to respect the db_backend flag in the config. The bug is on both v0.47.8 and v0.47.9.

We'd ideally like to backport this feature onto a v0.47.10 release, because upgrading to v0.50 now is a much larger effort.

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[julienrbrt]

Hi, good find! Could you add a changelog as well?

[k-yang]

Hi, good find! Could you add a changelog as well?

Done!