/
querier.go
99 lines (91 loc) · 3.03 KB
/
querier.go
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package keeper
import (
"fmt"
"strings"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
commontypes "github.com/datachainlab/cosmos-sdk-interchain-dns/x/ibc-dns/common/types"
"github.com/datachainlab/cosmos-sdk-interchain-dns/x/ibc-dns/server/types"
"github.com/gogo/protobuf/proto"
abci "github.com/tendermint/tendermint/abci/types"
)
const (
queryDomain = "domain"
queryDomains = "domains"
)
// NewQuerier is the module level router for state queries
func NewQuerier(keeper Keeper) sdk.Querier {
return func(ctx sdk.Context, path []string, req abci.RequestQuery) (res []byte, err error) {
switch path[0] {
case queryDomain:
return handleQueryDomain(ctx, keeper, req)
case queryDomains:
return handleQueryDomains(ctx, keeper, req)
default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unknown DNS %s query endpoint", commontypes.ModuleName)
}
}
}
func handleQueryDomain(ctx sdk.Context, k Keeper, req abci.RequestQuery) ([]byte, error) {
var query types.QueryDomainRequest
if err := types.ModuleCdc.UnmarshalJSON(req.Data, &query); err != nil {
return nil, err
}
res, err := k.QueryDomain(ctx, query)
if err != nil {
return nil, err
}
return types.ModuleCdc.MarshalJSON(res)
}
func handleQueryDomains(ctx sdk.Context, k Keeper, req abci.RequestQuery) ([]byte, error) {
var query types.QueryDomainsRequest
if err := types.ModuleCdc.UnmarshalJSON(req.Data, &query); err != nil {
return nil, err
}
res, err := k.QueryDomains(ctx)
if err != nil {
return nil, err
}
return types.ModuleCdc.MarshalJSON(res)
}
// QueryDomain returns a domain info corresponding to a given name
func (k Keeper) QueryDomain(ctx sdk.Context, req types.QueryDomainRequest) (*types.QueryDomainResponse, error) {
store := ctx.KVStore(k.storeKey)
var info types.DomainChannelInfo
bz := store.Get(types.KeyForwardDomain(req.Name))
if bz == nil {
return nil, fmt.Errorf("domain not found: %v", req.Name)
}
if err := proto.Unmarshal(bz, &info); err != nil {
return nil, err
}
return &types.QueryDomainResponse{
Domain: types.DomainInfo{
Name: req.Name,
Metadata: info.Metadata,
DnsId: commontypes.NewLocalDNSID(info.Channel.SourcePort, info.Channel.SourceChannel),
Channel: info.Channel,
},
}, nil
}
// QueryDomains returns all domain info
func (k Keeper) QueryDomains(ctx sdk.Context) (*types.QueryDomainsResponse, error) {
store := ctx.KVStore(k.storeKey)
prefix := types.KeyPrefixBytes(types.KeyForwardDomainPrefix)
iter := sdk.KVStorePrefixIterator(store, prefix)
var res types.QueryDomainsResponse
for ; iter.Valid(); iter.Next() {
var info types.DomainChannelInfo
if err := proto.Unmarshal(iter.Value(), &info); err != nil {
return nil, err
}
name := strings.TrimPrefix(string(iter.Key()), string(prefix))
res.Domains = append(res.Domains, types.DomainInfo{
Name: name,
Metadata: info.Metadata,
DnsId: commontypes.NewLocalDNSID(info.Channel.SourcePort, info.Channel.SourceChannel),
Channel: info.Channel,
})
}
return &res, nil
}