package keeper import ( abci "github.com/tendermint/tendermint/abci/types" "github.com/cosmos/cosmos-sdk/codec" sdk "github.com/cosmos/cosmos-sdk/types" "github.com/kava-labs/kava/x/cdp/types" ) // NewQuerier returns a new querier function func NewQuerier(keeper Keeper) sdk.Querier { return func(ctx sdk.Context, path []string, req abci.RequestQuery) (res []byte, err sdk.Error) { switch path[0] { case types.QueryGetCdp: return queryGetCdp(ctx, req, keeper) case types.QueryGetCdps: return queryGetCdpsByDenom(ctx, req, keeper) case types.QueryGetCdpsByCollateralization: return queryGetCdpsByRatio(ctx, req, keeper) case types.QueryGetParams: return queryGetParams(ctx, req, keeper) default: return nil, sdk.ErrUnknownRequest("unknown cdp query endpoint") } } } // query a specific cdp func queryGetCdp(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) { var requestParams types.QueryCdpParams err := keeper.cdc.UnmarshalJSON(req.Data, &requestParams) if err != nil { return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error())) } _, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom) if !valid { return nil, types.ErrInvalidCollateralDenom(keeper.codespace, requestParams.CollateralDenom) } cdp, found := keeper.GetCdpByOwnerAndDenom(ctx, requestParams.Owner, requestParams.CollateralDenom) if !found { return nil, types.ErrCdpNotFound(keeper.codespace, requestParams.Owner, requestParams.CollateralDenom) } bz, err := codec.MarshalJSONIndent(keeper.cdc, cdp) if err != nil { return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error())) } return bz, nil } // query cdps with matching denom and ratio LESS THAN the input ratio func queryGetCdpsByRatio(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) { var requestParams types.QueryCdpsByRatioParams err := keeper.cdc.UnmarshalJSON(req.Data, &requestParams) if err != nil { return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error())) } _, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom) if !valid { return nil, types.ErrInvalidCollateralDenom(keeper.codespace, requestParams.CollateralDenom) } cdps := keeper.GetAllCdpsByDenomAndRatio(ctx, requestParams.CollateralDenom, requestParams.Ratio) bz, err := codec.MarshalJSONIndent(keeper.cdc, cdps) if err != nil { return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error())) } return bz, nil } // query all cdps with matching collateral denom func queryGetCdpsByDenom(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) { var requestParams types.QueryCdpsParams err := keeper.cdc.UnmarshalJSON(req.Data, &requestParams) if err != nil { return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error())) } _, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom) if !valid { return nil, types.ErrInvalidCollateralDenom(keeper.codespace, requestParams.CollateralDenom) } cdps := keeper.GetAllCdpsByDenom(ctx, requestParams.CollateralDenom) bz, err := codec.MarshalJSONIndent(keeper.cdc, cdps) if err != nil { return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error())) } return bz, nil } // query params in the cdp store func queryGetParams(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) { // Get params params := keeper.GetParams(ctx) // Encode results bz, err := codec.MarshalJSONIndent(keeper.cdc, params) if err != nil { return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error())) } return bz, nil }