finality_provider_info returns response even if the fp doesn't exist

[gusin13]

One of the FP's below doesn't exist in contract storage but I think contract should return an error instead of success response if FP is not existing in storage.

root@11ff6ff54ba4:/ibcsim-bcd# bcd  q wasm contract-state smart bbnc1nc5tatafv6eyq7llkr2gv50ff9e22mnf70qgjlv737ktmt4eswrqgn0kq0 '{"finality_provider_info": {"btc_pk_hex":"1eac9bca6174365dec6a814edc588de407364dbad6260babe8dcface7c3448d8"}}'
data:
  btc_pk_hex: 1eac9bca6174365dec6a814edc588de407364dbad6260babe8dcface7c3448d8
  power: 0

root@11ff6ff54ba4:/ibcsim-bcd# bcd  q wasm contract-state smart bbnc1nc5tatafv6eyq7llkr2gv50ff9e22mnf70qgjlv737ktmt4eswrqgn0kq0 '{"finality_provider_info": {"btc_pk_hex":"4dada33478a8341c11082ce264a007335d530695e41bf5ddb35ba9e529311887"}}'
data:
  btc_pk_hex: 4dada33478a8341c11082ce264a007335d530695e41bf5ddb35ba9e529311887
  power: 0

[gusin13]

for example this is what babylond returns when a FP doesn't exist

root@4d576afaeb0b:/# babylond q btcstaking finality-provider-power-at-height 1eac9bca6174365dec6a814edc588de407364dbad6260babe8dcface7c3448d8 198
Error: rpc error: code = Unknown desc =
github.com/cosmos/cosmos-sdk/baseapp.gRPCErrorToSDKError
	github.com/cosmos/cosmos-sdk@v0.50.7/baseapp/abci.go:1169
github.com/cosmos/cosmos-sdk/baseapp.(*BaseApp).handleQueryGRPC
	github.com/cosmos/cosmos-sdk@v0.50.7/baseapp/abci.go:1141
github.com/cosmos/cosmos-sdk/baseapp.(*BaseApp).Query
	github.com/cosmos/cosmos-sdk@v0.50.7/baseapp/abci.go:177
github.com/cosmos/cosmos-sdk/server.cometABCIWrapper.Query
	github.com/cosmos/cosmos-sdk@v0.50.7/server/cmt_abci.go:24
github.com/cometbft/cometbft/abci/client.(*localClient).Query
	github.com/cometbft/cometbft@v0.38.7/abci/client/local_client.go:106
github.com/cometbft/cometbft/proxy.(*appConnQuery).Query
	github.com/cometbft/cometbft@v0.38.7/proxy/app_conn.go:181
github.com/cometbft/cometbft/rpc/core.(*Environment).ABCIQuery
	github.com/cometbft/cometbft@v0.38.7/rpc/core/abci.go:22
reflect.Value.call
	reflect/value.go:596
reflect.Value.Call
	reflect/value.go:380
github.com/cometbft/cometbft/rpc/jsonrpc/server.RegisterRPCFuncs.makeJSONRPCHandler.func3
	github.com/cometbft/cometbft@v0.38.7/rpc/jsonrpc/server/http_json_handler.go:108
github.com/cometbft/cometbft/rpc/jsonrpc/server.RegisterRPCFuncs.handleInvalidJSONRPCPaths.func4
	github.com/cometbft/cometbft@v0.38.7/rpc/jsonrpc/server/http_json_handler.go:140
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2171
net/http.(*ServeMux).ServeHTTP
	net/http/server.go:2688
github.com/cometbft/cometbft/node.(*Node).startRPC.(*Cors).Handler.func9
	github.com/rs/cors@v1.8.3/cors.go:236
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2171
github.com/cometbft/cometbft/rpc/jsonrpc/server.maxBytesHandler.ServeHTTP
	github.com/cometbft/cometbft@v0.38.7/rpc/jsonrpc/server/http_server.go:256
github.com/cometbft/cometbft/rpc/jsonrpc/server.Serve.RecoverAndLogHandler.func1
	github.com/cometbft/cometbft@v0.38.7/rpc/jsonrpc/server/http_server.go:229
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2171
net/http.serverHandler.ServeHTTP
	net/http/server.go:3142
net/http.(*conn).serve
	net/http/server.go:2044
the finality provider is not found: unknown request
Usage:
  babylond query btcstaking finality-provider-power-at-height [fp_btc_pk_hex] [height] [flags]

[maurolacy]

Fixed by #71.