diff options
Diffstat (limited to 'common/resolver/resolver.go')
| -rw-r--r-- | common/resolver/resolver.go | 56 |
1 files changed, 43 insertions, 13 deletions
diff --git a/common/resolver/resolver.go b/common/resolver/resolver.go index 45afb2971..35f765349 100644 --- a/common/resolver/resolver.go +++ b/common/resolver/resolver.go @@ -52,7 +52,7 @@ func New(eth Backend, uhca, nrca string) *Resolver { func (self *Resolver) KeyToContentHash(khash common.Hash) (chash common.Hash, err error) { // look up in hashReg - key := storageAddress(1, khash[:]) + key := storageAddress(storageMapping(storageIdx2Addr(1), khash[:])) hash := self.backend.StorageAt("0x"+self.hashRegContractAddress, key) if hash == "0x0" || len(hash) < 3 { @@ -66,16 +66,23 @@ func (self *Resolver) KeyToContentHash(khash common.Hash) (chash common.Hash, er func (self *Resolver) ContentHashToUrl(chash common.Hash) (uri string, err error) { // look up in URL reg - key := storageAddress(1, chash[:]) - hex := self.backend.StorageAt("0x"+self.urlHintContractAddress, key) - uri = string(common.Hex2Bytes(hex[2:])) - l := len(uri) - for (l > 0) && (uri[l-1] == 0) { - l-- + 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("0x"+self.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++ } - uri = uri[:l] - if l == 0 { + if len(uri) == 0 { err = fmt.Errorf("GetURLhint: URL hint not found") } return @@ -91,10 +98,33 @@ func (self *Resolver) KeyToUrl(key common.Hash) (uri string, hash common.Hash, e return } -func storageAddress(varidx uint32, key []byte) string { +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) - binary.BigEndian.PutUint32(data[60:64], varidx) copy(data[0:32], key[0:32]) - //fmt.Printf("%x %v\n", key, common.Bytes2Hex(crypto.Sha3(data))) - return "0x" + common.Bytes2Hex(crypto.Sha3(data)) + copy(data[32:64], addr[0:32]) + return crypto.Sha3(data) +} + +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 "0x" + common.Bytes2Hex(addr) } |