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

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package keeper
import (
"fmt"
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
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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)
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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)
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.ErrInternal(fmt.Sprintf("failed to parse params: %s", err))
}
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_, 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
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err := keeper.cdc.UnmarshalJSON(req.Data, &requestParams)
if err != nil {
return nil, sdk.ErrInternal(fmt.Sprintf("failed to parse params: %s", err))
}
_, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom)
if !valid {
return nil, types.ErrInvalidCollateralDenom(keeper.codespace, requestParams.CollateralDenom)
}
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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
}
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// 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.ErrInternal(fmt.Sprintf("failed to parse params: %s", err))
}
_, valid := keeper.GetDenomPrefix(ctx, requestParams.CollateralDenom)
if !valid {
return nil, types.ErrInvalidCollateralDenom(keeper.codespace, requestParams.CollateralDenom)
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}
cdps := keeper.GetAllCdpsByDenom(ctx, requestParams.CollateralDenom)
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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
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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
}