Official Go implementation of the Ethereum protocol
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go-ethereum/common/resolver/resolver.go

46 lines
986 B

package resolver
import (
"fmt"
"net/url"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/xeth"
)
/*
Resolver implements the Ethereum DNS mapping
NameReg : Domain Name (or Code hash of Contract) -> Content Hash
UrlHint : Content Hash -> Url Hint
*/
const (
urlHintContractAddress = "urlhint"
nameRegContractAddress = "nameReg"
)
type Resolver struct {
xeth *xeth.XEth
}
func (self *Resolver) NameToContentHash(name string) (hash common.Hash, err error) {
// look up in nameReg
copy(hash[:], []byte(name)[:32])
return
}
func (self *Resolver) ContentHashToUrl(hash common.Hash) (uri *url.URL, err error) {
// look up in nameReg
rawurl := fmt.Sprintf("bzz://%x/my/path/mycontract.sud", hash[:])
// mime type?
return url.Parse(rawurl)
}
func (self *Resolver) NameToUrl(name string) (uri *url.URL, err error) {
// look up in urlHint
hash, err := self.NameToContentHash(name)
if err != nil {
return
}
return self.ContentHashToUrl(hash)
}