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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/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/cosmos/cosmos-sdk/x/auth/types"
)
// NewQuerier creates a querier for auth REST endpoints
func NewQuerier(k AccountKeeper, legacyQuerierCdc *codec.LegacyAmino) sdk.Querier {
return func(ctx sdk.Context, path []string, req abci.RequestQuery) ([]byte, error) {
switch path[0] {
case types.QueryAccount:
return queryAccount(ctx, req, k, legacyQuerierCdc)
case types.QueryParams:
return queryParams(ctx, k, legacyQuerierCdc)
default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unknown query path: %s", path[0])
}
}
}
func queryAccount(ctx sdk.Context, req abci.RequestQuery, k AccountKeeper, legacyQuerierCdc *codec.LegacyAmino) ([]byte, error) {
var params types.QueryAccountRequest
if err := legacyQuerierCdc.UnmarshalJSON(req.Data, ¶ms); err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
}
addr, err := sdk.AccAddressFromBech32(params.Address)
if err != nil {
return nil, err
}
account := k.GetAccount(ctx, addr)
if account == nil {
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownAddress, "account %s does not exist", params.Address)
}
bz, err := codec.MarshalJSONIndent(legacyQuerierCdc, account)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
}
return bz, nil
}
func queryParams(ctx sdk.Context, k AccountKeeper, 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
}