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querier.go
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querier.go
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package keeper
import (
abci "github.com/tendermint/tendermint/abci/types"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/cosmos/cosmos-sdk/x/slashing/types"
)
// NewQuerier creates a new querier for slashing clients.
func NewQuerier(k Keeper, legacyQuerierCdc *codec.LegacyAmino) sdk.Querier {
return func(ctx sdk.Context, path []string, req abci.RequestQuery) ([]byte, error) {
switch path[0] {
case types.QueryParameters:
return queryParams(ctx, k, legacyQuerierCdc)
case types.QuerySigningInfo:
return querySigningInfo(ctx, req, k, legacyQuerierCdc)
case types.QuerySigningInfos:
return querySigningInfos(ctx, req, k, legacyQuerierCdc)
default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unknown %s query endpoint: %s", types.ModuleName, path[0])
}
}
}
func queryParams(ctx sdk.Context, k Keeper, legacyQuerierCdc *codec.LegacyAmino) ([]byte, error) {
params := k.GetParams(ctx)
res, err := codec.MarshalJSONIndent(legacyQuerierCdc, params)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
}
return res, nil
}
func querySigningInfo(ctx sdk.Context, req abci.RequestQuery, k Keeper, legacyQuerierCdc *codec.LegacyAmino) ([]byte, error) {
var params types.QuerySigningInfoRequest
err := legacyQuerierCdc.UnmarshalJSON(req.Data, ¶ms)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
}
signingInfo, found := k.GetValidatorSigningInfo(ctx, sdk.ConsAddress(params.ConsAddress))
if !found {
return nil, sdkerrors.Wrap(types.ErrNoSigningInfoFound, params.ConsAddress)
}
res, err := codec.MarshalJSONIndent(legacyQuerierCdc, signingInfo)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
}
return res, nil
}
func querySigningInfos(ctx sdk.Context, req abci.RequestQuery, k Keeper, legacyQuerierCdc *codec.LegacyAmino) ([]byte, error) {
var params types.QuerySigningInfosParams
err := legacyQuerierCdc.UnmarshalJSON(req.Data, ¶ms)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
}
var signingInfos []types.ValidatorSigningInfo
k.IterateValidatorSigningInfos(ctx, func(consAddr sdk.ConsAddress, info types.ValidatorSigningInfo) (stop bool) {
signingInfos = append(signingInfos, info)
return false
})
start, end := client.Paginate(len(signingInfos), params.Page, params.Limit, int(k.sk.MaxValidators(ctx)))
if start < 0 || end < 0 {
signingInfos = []types.ValidatorSigningInfo{}
} else {
signingInfos = signingInfos[start:end]
}
res, err := codec.MarshalJSONIndent(legacyQuerierCdc, signingInfos)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
}
return res, nil
}