48 lines
1.5 KiB
Go
48 lines
1.5 KiB
Go
package keeper
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import (
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abci "github.com/tendermint/tendermint/abci/types"
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"github.com/cosmos/cosmos-sdk/codec"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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"github.com/cosmos/cosmos-sdk/x/params/types"
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"github.com/cosmos/cosmos-sdk/x/params/types/proposal"
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)
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// NewQuerier returns a new querier handler for the x/params module.
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func NewQuerier(k Keeper, legacyQuerierCdc *codec.LegacyAmino) sdk.Querier {
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return func(ctx sdk.Context, path []string, req abci.RequestQuery) ([]byte, error) {
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switch path[0] {
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case types.QueryParams:
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return queryParams(ctx, req, k, legacyQuerierCdc)
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default:
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return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unknown query path: %s", path[0])
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}
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}
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}
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func queryParams(ctx sdk.Context, req abci.RequestQuery, k Keeper, legacyQuerierCdc *codec.LegacyAmino) ([]byte, error) {
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var params types.QuerySubspaceParams
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if err := legacyQuerierCdc.UnmarshalJSON(req.Data, ¶ms); err != nil {
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return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
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}
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ss, ok := k.GetSubspace(params.Subspace)
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if !ok {
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return nil, sdkerrors.Wrap(proposal.ErrUnknownSubspace, params.Subspace)
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}
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rawValue := ss.GetRaw(ctx, []byte(params.Key))
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resp := types.NewSubspaceParamsResponse(params.Subspace, params.Key, string(rawValue))
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bz, err := codec.MarshalJSONIndent(legacyQuerierCdc, resp)
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if err != nil {
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return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
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}
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return bz, nil
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}
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