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grpc_query.go
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grpc_query.go
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package keeper
import (
"context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
proto "github.com/gogo/protobuf/proto"
"github.com/cosmos/cosmos-sdk/codec"
codectypes "github.com/cosmos/cosmos-sdk/codec/types"
"github.com/cosmos/cosmos-sdk/store/prefix"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/types/query"
"github.com/cosmos/cosmos-sdk/x/authz"
)
var _ authz.QueryServer = Keeper{}
// Authorizations implements the Query/Grants gRPC method.
func (k Keeper) Grants(c context.Context, req *authz.QueryGrantsRequest) (*authz.QueryGrantsResponse, error) {
if req == nil {
return nil, status.Errorf(codes.InvalidArgument, "empty request")
}
granter, err := sdk.AccAddressFromBech32(req.Granter)
if err != nil {
return nil, err
}
grantee, err := sdk.AccAddressFromBech32(req.Grantee)
if err != nil {
return nil, err
}
ctx := sdk.UnwrapSDKContext(c)
store := ctx.KVStore(k.storeKey)
key := grantStoreKey(grantee, granter, "")
authStore := prefix.NewStore(store, key)
if req.MsgTypeUrl != "" {
authorization, expiration := k.GetCleanAuthorization(ctx, grantee, granter, req.MsgTypeUrl)
if authorization == nil {
return nil, status.Errorf(codes.NotFound, "no authorization found for %s type", req.MsgTypeUrl)
}
authorizationAny, err := codectypes.NewAnyWithValue(authorization)
if err != nil {
return nil, status.Errorf(codes.Internal, err.Error())
}
return &authz.QueryGrantsResponse{
Grants: []*authz.Grant{{
Authorization: authorizationAny,
Expiration: expiration,
}},
}, nil
}
var authorizations []*authz.Grant
pageRes, err := query.FilteredPaginate(authStore, req.Pagination, func(key []byte, value []byte, accumulate bool) (bool, error) {
auth, err := unmarshalAuthorization(k.cdc, value)
if err != nil {
return false, err
}
auth1 := auth.GetAuthorization()
if accumulate {
msg, ok := auth1.(proto.Message)
if !ok {
return false, status.Errorf(codes.Internal, "can't protomarshal %T", msg)
}
authorizationAny, err := codectypes.NewAnyWithValue(msg)
if err != nil {
return false, status.Errorf(codes.Internal, err.Error())
}
authorizations = append(authorizations, &authz.Grant{
Authorization: authorizationAny,
Expiration: auth.Expiration,
})
}
return true, nil
})
if err != nil {
return nil, err
}
return &authz.QueryGrantsResponse{
Grants: authorizations,
Pagination: pageRes,
}, nil
}
// unmarshal an authorization from a store value
func unmarshalAuthorization(cdc codec.BinaryCodec, value []byte) (v authz.Grant, err error) {
err = cdc.Unmarshal(value, &v)
return v, err
}