1 files changed, 0 insertions, 232 deletions
diff --git a/common/resolver/resolver.go b/common/resolver/resolver.go
deleted file mode 100644
index 9016547e1..000000000
--- a/common/resolver/resolver.go
+++ /dev/null
@@ -1,232 +0,0 @@
-package resolver
-
-import (
-	"encoding/binary"
-	"fmt"
-
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/ethereum/go-ethereum/logger"
-	"github.com/ethereum/go-ethereum/logger/glog"
-)
-
-/*
-Resolver implements the Ethereum DNS mapping
-HashReg : Key Hash (hash of domain name or contract code) -> Content Hash
-UrlHint : Content Hash -> Url Hint
-
-The resolver is meant to be called by the roundtripper transport implementation
-of a url scheme
-*/
-
-// // contract addresses will be hardcoded after they're created
-var UrlHintContractAddress, HashRegContractAddress string
-
-const (
-	txValue    = "0"
-	txGas      = "100000"
-	txGasPrice = "1000000000000"
-)
-
-func abi(s string) string {
-	return common.ToHex(crypto.Sha3([]byte(s))[:4])
-}
-
-var (
-	registerContentHashAbi = abi("register(uint256,uint256)")
-	registerUrlAbi         = abi("register(uint256,uint8,uint256)")
-	setOwnerAbi            = abi("setowner()")
-)
-
-type Backend interface {
-	StorageAt(string, string) string
-	Transact(fromStr, toStr, nonceStr, valueStr, gasStr, gasPriceStr, codeStr string) (string, error)
-}
-
-type Resolver struct {
-	backend Backend
-}
-
-func New(eth Backend) *Resolver {
-	return &Resolver{eth}
-}
-
-// for testing and play temporarily
-// ideally the HashReg and UrlHint contracts should be in the genesis block
-// if we got build-in support for natspec/contract info
-// there should be only one of these officially endorsed
-// addresses as constants
-// TODO: could get around this with namereg, check
-func (self *Resolver) CreateContracts(addr common.Address) (err error) {
-	HashRegContractAddress, err = self.backend.Transact(addr.Hex(), "", "", txValue, txGas, txGasPrice, ContractCodeHashReg)
-	if err != nil {
-		return
-	}
-	UrlHintContractAddress, err = self.backend.Transact(addr.Hex(), "", "", txValue, txGas, txGasPrice, ContractCodeURLhint)
-	glog.V(logger.Detail).Infof("HashReg @ %v\nUrlHint @ %v\n", HashRegContractAddress, UrlHintContractAddress)
-	return
-}
-
-// called as first step in the registration process on HashReg
-func (self *Resolver) SetOwner(address common.Address) (txh string, err error) {
-	return self.backend.Transact(
-		address.Hex(),
-		HashRegContractAddress,
-		"", txValue, txGas, txGasPrice,
-		setOwnerAbi,
-	)
-}
-
-// registers some content hash to a key/code hash
-// e.g., the contract Info combined Json Doc's ContentHash
-// to CodeHash of a contract or hash of a domain
-// kept
-func (self *Resolver) RegisterContentHash(address common.Address, codehash, dochash common.Hash) (txh string, err error) {
-	_, err = self.SetOwner(address)
-	if err != nil {
-		return
-	}
-	codehex := common.Bytes2Hex(codehash[:])
-	dochex := common.Bytes2Hex(dochash[:])
-
-	data := registerContentHashAbi + codehex + dochex
-	return self.backend.Transact(
-		address.Hex(),
-		HashRegContractAddress,
-		"", txValue, txGas, txGasPrice,
-		data,
-	)
-}
-
-// registers a url to a content hash so that the content can be fetched
-// address is used as sender for the transaction and will be the owner of a new
-// registry entry on first time use
-// FIXME: silently doing nothing if sender is not the owner
-// note that with content addressed storage, this step is no longer necessary
-// it could be purely
-func (self *Resolver) RegisterUrl(address common.Address, hash common.Hash, url string) (txh string, err error) {
-	hashHex := common.Bytes2Hex(hash[:])
-	var urlHex string
-	urlb := []byte(url)
-	var cnt byte
-	n := len(urlb)
-
-	for n > 0 {
-		if n > 32 {
-			n = 32
-		}
-		urlHex = common.Bytes2Hex(urlb[:n])
-		urlb = urlb[n:]
-		n = len(urlb)
-		bcnt := make([]byte, 32)
-		bcnt[31] = cnt
-		data := registerUrlAbi +
-			hashHex +
-			common.Bytes2Hex(bcnt) +
-			common.Bytes2Hex(common.Hex2BytesFixed(urlHex, 32))
-		txh, err = self.backend.Transact(
-			address.Hex(),
-			UrlHintContractAddress,
-			"", txValue, txGas, txGasPrice,
-			data,
-		)
-		if err != nil {
-			return
-		}
-		cnt++
-	}
-	return
-}
-
-func (self *Resolver) Register(address common.Address, codehash, dochash common.Hash, url string) (txh string, err error) {
-
-	_, err = self.RegisterContentHash(address, codehash, dochash)
-	if err != nil {
-		return
-	}
-	return self.RegisterUrl(address, dochash, url)
-}
-
-// resolution is costless non-transactional
-// implemented as direct retrieval from  db
-func (self *Resolver) KeyToContentHash(khash common.Hash) (chash common.Hash, err error) {
-	// look up in hashReg
-	at := common.Bytes2Hex(common.FromHex(HashRegContractAddress))
-	key := storageAddress(storageMapping(storageIdx2Addr(1), khash[:]))
-	hash := self.backend.StorageAt(at, key)
-
-	if hash == "0x0" || len(hash) < 3 {
-		err = fmt.Errorf("content hash not found for '%v'", khash.Hex())
-		return
-	}
-	copy(chash[:], common.Hex2BytesFixed(hash[2:], 32))
-	return
-}
-
-// retrieves the url-hint for the content hash -
-// if we use content addressed storage, this step is no longer necessary
-func (self *Resolver) ContentHashToUrl(chash common.Hash) (uri string, err error) {
-	// look up in URL reg
-	var str string = " "
-	var idx uint32
-	for len(str) > 0 {
-		mapaddr := storageMapping(storageIdx2Addr(1), chash[:])
-		key := storageAddress(storageFixedArray(mapaddr, storageIdx2Addr(idx)))
-		hex := self.backend.StorageAt(UrlHintContractAddress, key)
-		str = string(common.Hex2Bytes(hex[2:]))
-		l := len(str)
-		for (l > 0) && (str[l-1] == 0) {
-			l--
-		}
-		str = str[:l]
-		uri = uri + str
-		idx++
-	}
-
-	if len(uri) == 0 {
-		err = fmt.Errorf("GetURLhint: URL hint not found for '%v'", chash.Hex())
-	}
-	return
-}
-
-func (self *Resolver) KeyToUrl(key common.Hash) (uri string, hash common.Hash, err error) {
-	// look up in urlHint
-	hash, err = self.KeyToContentHash(key)
-	if err != nil {
-		return
-	}
-	uri, err = self.ContentHashToUrl(hash)
-	return
-}
-
-func storageIdx2Addr(varidx uint32) []byte {
-	data := make([]byte, 32)
-	binary.BigEndian.PutUint32(data[28:32], varidx)
-	return data
-}
-
-func storageMapping(addr, key []byte) []byte {
-	data := make([]byte, 64)
-	copy(data[0:32], key[0:32])
-	copy(data[32:64], addr[0:32])
-	sha := crypto.Sha3(data)
-	return sha
-}
-
-func storageFixedArray(addr, idx []byte) []byte {
-	var carry byte
-	for i := 31; i >= 0; i-- {
-		var b byte = addr[i] + idx[i] + carry
-		if b < addr[i] {
-			carry = 1
-		} else {
-			carry = 0
-		}
-		addr[i] = b
-	}
-	return addr
-}
-
-func storageAddress(addr []byte) string {
-	return common.ToHex(addr)
-}