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grpc_query.go
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/
grpc_query.go
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package keeper
import (
"context"
"github.com/gogo/protobuf/proto"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
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/feegrant"
)
var _ feegrant.QueryServer = Keeper{}
// Allowance returns fee granted to the grantee by the granter.
func (q Keeper) Allowance(c context.Context, req *feegrant.QueryAllowanceRequest) (*feegrant.QueryAllowanceResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "invalid request")
}
granterAddr, err := sdk.AccAddressFromBech32(req.Granter)
if err != nil {
return nil, err
}
granteeAddr, err := sdk.AccAddressFromBech32(req.Grantee)
if err != nil {
return nil, err
}
ctx := sdk.UnwrapSDKContext(c)
feeAllowance, err := q.GetAllowance(ctx, granterAddr, granteeAddr)
if err != nil {
return nil, status.Errorf(codes.Internal, err.Error())
}
msg, ok := feeAllowance.(proto.Message)
if !ok {
return nil, status.Errorf(codes.Internal, "can't proto marshal %T", msg)
}
feeAllowanceAny, err := codectypes.NewAnyWithValue(msg)
if err != nil {
return nil, status.Errorf(codes.Internal, err.Error())
}
return &feegrant.QueryAllowanceResponse{
Allowance: &feegrant.Grant{
Granter: granterAddr.String(),
Grantee: granteeAddr.String(),
Allowance: feeAllowanceAny,
},
}, nil
}
// Allowances queries all the allowances granted to the given grantee.
func (q Keeper) Allowances(c context.Context, req *feegrant.QueryAllowancesRequest) (*feegrant.QueryAllowancesResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "invalid request")
}
granteeAddr, err := sdk.AccAddressFromBech32(req.Grantee)
if err != nil {
return nil, err
}
ctx := sdk.UnwrapSDKContext(c)
var grants []*feegrant.Grant
store := ctx.KVStore(q.storeKey)
grantsStore := prefix.NewStore(store, feegrant.FeeAllowancePrefixByGrantee(granteeAddr))
pageRes, err := query.Paginate(grantsStore, req.Pagination, func(key []byte, value []byte) error {
var grant feegrant.Grant
if err := q.cdc.Unmarshal(value, &grant); err != nil {
return err
}
grants = append(grants, &grant)
return nil
})
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return &feegrant.QueryAllowancesResponse{Allowances: grants, Pagination: pageRes}, nil
}
// AllowancesByGranter queries all the allowances granted by the given granter
func (q Keeper) AllowancesByGranter(c context.Context, req *feegrant.QueryAllowancesByGranterRequest) (*feegrant.QueryAllowancesByGranterResponse, error) {
if req == nil {
return nil, status.Error(codes.InvalidArgument, "invalid request")
}
granterAddr, err := sdk.AccAddressFromBech32(req.Granter)
if err != nil {
return nil, err
}
ctx := sdk.UnwrapSDKContext(c)
var grants []*feegrant.Grant
store := ctx.KVStore(q.storeKey)
prefixStore := prefix.NewStore(store, feegrant.FeeAllowanceKeyPrefix)
pageRes, err := query.Paginate(prefixStore, req.Pagination, func(key []byte, value []byte) error {
var grant feegrant.Grant
// ParseAddressesFromFeeAllowanceKey expects the full key including the prefix.
granter, _ := feegrant.ParseAddressesFromFeeAllowanceKey(append(feegrant.FeeAllowanceKeyPrefix, key...))
if !granter.Equals(granterAddr) {
return nil
}
if err := q.cdc.Unmarshal(value, &grant); err != nil {
return err
}
grants = append(grants, &grant)
return nil
})
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return &feegrant.QueryAllowancesByGranterResponse{Allowances: grants, Pagination: pageRes}, nil
}