feat(fungible): add query command to get all gas stability pool balances

docs/openapi/openapi.swagger.yaml

@@ -27810,6 +27810,21 @@ paths:
             $ref: '#/definitions/googlerpcStatus'
       tags:
         - Query
+  /zeta-chain/zetacore/fungible/gas_stability_pool_balance:
+    get:
+      summary: Queries all gas stability pool balances.
+      operationId: Query_GasStabilityPoolBalanceAll
+      responses:
+        "200":
+          description: A successful response.
+          schema:
+            $ref: '#/definitions/fungibleQueryAllGasStabilityPoolBalanceResponse'
+        default:
+          description: An unexpected error response.
+          schema:
+            $ref: '#/definitions/googlerpcStatus'
+      tags:
+        - Query
   /zeta-chain/zetacore/fungible/gas_stability_pool_balance/{chain_id}:
     get:
       summary: Queries the balance of a gas stability pool on a given chain.
@@ -50202,6 +50217,14 @@ definitions:
        - VOTE_OPTION_ABSTAIN: VOTE_OPTION_ABSTAIN defines an abstain vote option.
        - VOTE_OPTION_NO: VOTE_OPTION_NO defines a no vote option.
        - VOTE_OPTION_NO_WITH_VETO: VOTE_OPTION_NO_WITH_VETO defines a no with veto vote option.
+  QueryAllGasStabilityPoolBalanceResponseBalance:
+    type: object
+    properties:
+      chain_id:
+        type: string
+        format: int64
+      balance:
+        type: string
   commonBlockHeader:
     type: object
     properties:
@@ -50816,6 +50839,14 @@ definitions:
           $ref: '#/definitions/fungibleForeignCoins'
       pagination:
         $ref: '#/definitions/v1beta1PageResponse'
+  fungibleQueryAllGasStabilityPoolBalanceResponse:
+    type: object
+    properties:
+      balances:
+        type: array
+        items:
+          type: object
+          $ref: '#/definitions/QueryAllGasStabilityPoolBalanceResponseBalance'
   fungibleQueryGetForeignCoinsResponse:
     type: object
     properties:
@@ -50831,8 +50862,6 @@ definitions:
   fungibleQueryGetGasStabilityPoolBalanceResponse:
     type: object
     properties:
-      contract_address:
-        type: string
       balance:
         type: string
   fungibleQueryGetSystemContractResponse:

proto/fungible/query.proto

@@ -40,6 +40,11 @@ service Query {
   rpc GasStabilityPoolBalance(QueryGetGasStabilityPoolBalance) returns (QueryGetGasStabilityPoolBalanceResponse) {
     option (google.api.http).get = "/zeta-chain/zetacore/fungible/gas_stability_pool_balance/{chain_id}";
   }
+
+  // Queries all gas stability pool balances.
+  rpc GasStabilityPoolBalanceAll(QueryAllGasStabilityPoolBalance) returns (QueryAllGasStabilityPoolBalanceResponse) {
+    option (google.api.http).get = "/zeta-chain/zetacore/fungible/gas_stability_pool_balance";
+  }
 }
 
 // QueryParamsRequest is request type for the Query/Params RPC method.
@@ -86,6 +91,15 @@ message QueryGetGasStabilityPoolBalance {
 }
 
 message QueryGetGasStabilityPoolBalanceResponse {
-  string contract_address = 1;
   string balance = 2;
 }
+
+message QueryAllGasStabilityPoolBalance {}
+
+message QueryAllGasStabilityPoolBalanceResponse {
+  message Balance {
+    int64 chain_id = 1;
+    string balance = 2;
+  }
+  repeated Balance balances = 1 [(gogoproto.nullable) = false];
+}

x/fungible/client/cli/query.go

@@ -30,6 +30,7 @@ func GetQueryCmd(_ string) *cobra.Command {
 		CmdShowForeignCoins(),
 		CmdGasStabilityPoolAddress(),
 		CmdGasStabilityPoolBalance(),
+		CmdGasStabilityPoolBalances(),
 	)
 
 	return cmd

x/fungible/client/cli/query_gas_stability_pool.go

@@ -68,3 +68,28 @@ func CmdGasStabilityPoolBalance() *cobra.Command {
 
 	return cmd
 }
+
+func CmdGasStabilityPoolBalances() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "gas-stability-pool-balances",
+		Short: "query all gas stability pool balances",
+		Args:  cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			clientCtx := client.GetClientContextFromCmd(cmd)
+
+			queryClient := types.NewQueryClient(clientCtx)
+
+			res, err := queryClient.GasStabilityPoolBalanceAll(context.Background(), &types.QueryAllGasStabilityPoolBalance{})
+			if err != nil {
+				return err
+			}
+
+			return clientCtx.PrintProto(res)
+		},
+	}
+
+	flags.AddPaginationFlagsToCmd(cmd, cmd.Use)
+	flags.AddQueryFlagsToCmd(cmd)
+
+	return cmd
+}

x/fungible/keeper/grpc_gas_stability_pool.go

@@ -42,3 +42,40 @@ func (k Keeper) GasStabilityPoolBalance(
 
 	return &types.QueryGetGasStabilityPoolBalanceResponse{Balance: balance.String()}, nil
 }
+
+func (k Keeper) GasStabilityPoolBalanceAll(
+	c context.Context,
+	req *types.QueryAllGasStabilityPoolBalance,
+) (*types.QueryAllGasStabilityPoolBalanceResponse, error) {
+	if req == nil {
+		return nil, status.Error(codes.InvalidArgument, "invalid request")
+	}
+	ctx := sdk.UnwrapSDKContext(c)
+
+	// iterate supported chains
+	chains := k.observerKeeper.GetParams(ctx).GetSupportedChains()
+	balances := make([]types.QueryAllGasStabilityPoolBalanceResponse_Balance, 0, len(chains))
+	for _, chain := range chains {
+		if chain == nil {
+			return nil, status.Error(codes.Internal, "invalid chain")
+		}
+		chainID := chain.ChainId
+
+		balance, err := k.GetGasStabilityPoolBalance(ctx, chainID)
+		if err != nil {
+			return nil, status.Error(codes.Internal, err.Error())
+		}
+		if balance == nil {
+			return nil, status.Error(codes.NotFound, "no balance for the gas stability pool")
+		}
+
+		balances = append(balances, types.QueryAllGasStabilityPoolBalanceResponse_Balance{
+			ChainId: chainID,
+			Balance: balance.String(),
+		})
+	}
+
+	return &types.QueryAllGasStabilityPoolBalanceResponse{
+		Balances: balances,
+	}, nil
+}