fix: Don't error on startup if min-gas-price is empty (cosmos#9621)

* fix: Don't error on startup if min-gas-price is empty

* remove test

* Update server/start.go

* Update server/start.go

Co-authored-by: Aaron Craelius <aaron@regen.network>

* Switch to error

Co-authored-by: Aaron Craelius <aaron@regen.network>

CHANGELOG.md

@@ -146,10 +146,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * [\#8628](https://github.com/cosmos/cosmos-sdk/issues/8628) Commands no longer print outputs using `stderr` by default
 * [\#9134](https://github.com/cosmos/cosmos-sdk/pull/9134) Renamed the CLI flag `--memo` to `--note`.
 * [\#9291](https://github.com/cosmos/cosmos-sdk/pull/9291) Migration scripts prior to v0.38 have been removed from the CLI `migrate` command. The oldest supported migration is v0.39->v0.42.
-* [\#9371](https://github.com/cosmos/cosmos-sdk/pull/9371) Non-zero default fees/Server will error if there's an empty value for min-gas-price in app.toml
-* [\#9827](https://github.com/cosmos/cosmos-sdk/pull/9827) Ensure input parity of validator public key input between `tx staking create-validator` and `gentx`.
-* [\#9781](https://github.com/cosmos/cosmos-sdk/pull/9781) Improve`withdraw-all-rewards` UX when broadcast mode `async` or `async` is used.
-* [\#9621](https://github.com/cosmos/cosmos-sdk/pull/9621) Rollback [\#9371](https://github.com/cosmos/cosmos-sdk/pull/9371) and log warning if there's an empty value for min-gas-price in app.toml
+
 
 ### Improvements
 

server/start.go

@@ -249,7 +249,7 @@ func startInProcess(ctx *Context, clientCtx client.Context, appCreator types.App
 	if err := config.ValidateBasic(); err != nil {
 		ctx.Logger.Error("WARNING: The minimum-gas-prices config in app.toml is set to the empty string. " +
 			"This defaults to 0 in the current version, but will error in the next version " +
-			"(SDK v0.45). Please explicitly put the desired minimum-gas-prices in your app.toml.")
+			"(SDK v0.44). Please explicitly put the desired minimum-gas-prices in your app.toml.")
 	}
 
 	app := appCreator(ctx.Logger, db, traceWriter, ctx.Viper)