package keeper import ( abci "github.com/tendermint/tendermint/abci/types" "github.com/cosmos/cosmos-sdk/codec" sdk "github.com/cosmos/cosmos-sdk/types" sdkerrors "github.com/cosmos/cosmos-sdk/types/errors" "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 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) case types.QueryGetCdpDeposits: return queryGetDeposits(ctx, req, keeper) default: return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unknown %s query endpoint %s", types.ModuleName, path[0]) } } } // query a specific cdp func queryGetCdp(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) { var requestParams types.QueryCdpParams err := types.ModuleCdc.UnmarshalJSON(req.Data, &requestParams) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error()) } _, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom) if !valid { return nil, sdkerrors.Wrap(types.ErrCollateralNotSupported, requestParams.CollateralDenom) } cdp, found := keeper.GetCdpByOwnerAndDenom(ctx, requestParams.Owner, requestParams.CollateralDenom) if !found { return nil, sdkerrors.Wrapf(types.ErrCdpNotFound, "owner %s, denom %s", requestParams.Owner, requestParams.CollateralDenom) } augmentedCDP := keeper.LoadAugmentedCDP(ctx, cdp) bz, err := codec.MarshalJSONIndent(types.ModuleCdc, augmentedCDP) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error()) } return bz, nil } // query deposits on a particular cdp func queryGetDeposits(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) { var requestParams types.QueryCdpDeposits err := types.ModuleCdc.UnmarshalJSON(req.Data, &requestParams) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error()) } _, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom) if !valid { return nil, sdkerrors.Wrap(types.ErrCollateralNotSupported, requestParams.CollateralDenom) } cdp, found := keeper.GetCdpByOwnerAndDenom(ctx, requestParams.Owner, requestParams.CollateralDenom) if !found { return nil, sdkerrors.Wrapf(types.ErrCdpNotFound, "owner %s, denom %s", requestParams.Owner, requestParams.CollateralDenom) } deposits := keeper.GetDeposits(ctx, cdp.ID) bz, err := codec.MarshalJSONIndent(types.ModuleCdc, deposits) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, 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, error) { var requestParams types.QueryCdpsByRatioParams err := types.ModuleCdc.UnmarshalJSON(req.Data, &requestParams) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error()) } _, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom) if !valid { return nil, sdkerrors.Wrap(types.ErrCollateralNotSupported, requestParams.CollateralDenom) } ratio, err := keeper.CalculateCollateralizationRatioFromAbsoluteRatio(ctx, requestParams.CollateralDenom, requestParams.Ratio, "liquidation") if err != nil { return nil, sdkerrors.Wrap(err, "couldn't get collateralization ratio from absolute ratio") } cdps := keeper.GetAllCdpsByDenomAndRatio(ctx, requestParams.CollateralDenom, ratio) // augment CDPs by adding collateral value and collateralization ratio var augmentedCDPs types.AugmentedCDPs for _, cdp := range cdps { augmentedCDP := keeper.LoadAugmentedCDP(ctx, cdp) augmentedCDPs = append(augmentedCDPs, augmentedCDP) } bz, err := codec.MarshalJSONIndent(types.ModuleCdc, augmentedCDPs) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error()) } return bz, nil } // query all cdps with matching collateral denom func queryGetCdpsByDenom(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) { var requestParams types.QueryCdpsParams err := types.ModuleCdc.UnmarshalJSON(req.Data, &requestParams) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error()) } _, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom) if !valid { return nil, sdkerrors.Wrap(types.ErrCollateralNotSupported, requestParams.CollateralDenom) } cdps := keeper.GetAllCdpsByDenom(ctx, requestParams.CollateralDenom) // augment CDPs by adding collateral value and collateralization ratio var augmentedCDPs types.AugmentedCDPs for _, cdp := range cdps { augmentedCDP := keeper.LoadAugmentedCDP(ctx, cdp) augmentedCDPs = append(augmentedCDPs, augmentedCDP) } bz, err := codec.MarshalJSONIndent(types.ModuleCdc, augmentedCDPs) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error()) } return bz, nil } // query params in the cdp store func queryGetParams(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) { // Get params params := keeper.GetParams(ctx) // Encode results bz, err := codec.MarshalJSONIndent(types.ModuleCdc, params) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error()) } return bz, nil }