0g-chain/x/cdp/keeper/querier.go

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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"
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"github.com/kava-labs/kava/x/cdp/types"
)
// NewQuerier returns a new querier function
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func NewQuerier(keeper Keeper) sdk.Querier {
return func(ctx sdk.Context, path []string, req abci.RequestQuery) (res []byte, err error) {
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switch path[0] {
case types.QueryGetCdp:
return queryGetCdp(ctx, req, keeper)
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case types.QueryGetCdps:
return queryGetCdpsByDenom(ctx, req, keeper)
case types.QueryGetCdpsByCollateralization:
return queryGetCdpsByRatio(ctx, req, keeper)
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case types.QueryGetParams:
return queryGetParams(ctx, req, keeper)
case types.QueryGetCdpDeposits:
return queryGetDeposits(ctx, req, keeper)
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default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unknown %s query endpoint %s", types.ModuleName, path[0])
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}
}
}
// 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())
}
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_, 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)
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if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
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}
_, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom)
if !valid {
return nil, sdkerrors.Wrap(types.ErrCollateralNotSupported, requestParams.CollateralDenom)
}
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ratio, err := keeper.CalculateCollateralizationRatioFromAbsoluteRatio(ctx, requestParams.CollateralDenom, requestParams.Ratio)
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
}
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// 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)
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}
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)
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if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
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}
return bz, nil
}
// query params in the cdp store
func queryGetParams(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
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// Get params
params := keeper.GetParams(ctx)
// Encode results
bz, err := codec.MarshalJSONIndent(types.ModuleCdc, params)
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if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
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}
return bz, nil
}