0g-chain/x/cdp/keeper/querier.go
Kevin Davis ae4aee46ff
Use sdk.Coin in cdp module (#466)
* Use sdk.Coin in cdp module
Co-authored-by: Federico Kunze <federico.kunze94@gmail.com>
Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Denali Marsh <denali@kava.io>
Co-authored-by: John Maheswaran <john@noreply>
2020-04-27 10:40:34 -04:00

167 lines
5.7 KiB
Go

package keeper
import (
"fmt"
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, err := keeper.LoadAugmentedCDP(ctx, cdp)
if err != nil {
return nil, sdkerrors.Wrap(types.ErrLoadingAugmentedCDP, fmt.Sprintf("%v: %d", err.Error(), cdp.ID))
}
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)
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, err := keeper.LoadAugmentedCDP(ctx, cdp)
if err == nil {
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, err := keeper.LoadAugmentedCDP(ctx, cdp)
if err == nil {
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
}