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Merge branch 'ethersphere-frontier/natspec' into develop

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This commit is contained in:
obscuren 2015-04-20 18:09:10 +02:00
commit 3b45fedb81
18 changed files with 5108 additions and 85 deletions
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18
cmd/geth/js.go
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@ -25,7 +25,8 @@ import (
"strings"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/common/docserver"
"github.com/ethereum/go-ethereum/common/natspec"
"github.com/ethereum/go-ethereum/eth"
re "github.com/ethereum/go-ethereum/jsre"
"github.com/ethereum/go-ethereum/rpc"
@ -139,10 +140,17 @@ var net = web3.net;
js.re.Eval(globalRegistrar + "registrar = new GlobalRegistrar(\"" + globalRegistrarAddr + "\");")
}
func (self *jsre) ConfirmTransaction(tx *types.Transaction) bool {
p := fmt.Sprintf("Confirm Transaction %v\n[y/n] ", tx)
answer, _ := self.Prompt(p)
return strings.HasPrefix(strings.Trim(answer, " "), "y")
var ds, _ = docserver.New(utils.JSpathFlag.String())
func (self *jsre) ConfirmTransaction(tx string) bool {
if self.ethereum.NatSpec {
notice := natspec.GetNotice(self.xeth, tx, ds)
fmt.Println(notice)
answer, _ := self.Prompt("Confirm Transaction\n[y/n] ")
return strings.HasPrefix(strings.Trim(answer, " "), "y")
} else {
return true
}
}
func (self *jsre) UnlockAccount(addr []byte) bool {

1
cmd/geth/main.go
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@ -231,6 +231,7 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
utils.MinerThreadsFlag,
utils.MiningEnabledFlag,
utils.NATFlag,
utils.NatspecEnabledFlag,
utils.NodeKeyFileFlag,
utils.NodeKeyHexFlag,
utils.RPCEnabledFlag,

5
cmd/utils/flags.go
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@ -93,6 +93,10 @@ var (
Name: "identity",
Usage: "node name",
}
NatspecEnabledFlag = cli.BoolFlag{
Name: "natspec",
Usage: "Enable NatSpec confirmation notice",
}
// miner settings
MinerThreadsFlag = cli.IntFlag{
@ -268,6 +272,7 @@ func MakeEthConfig(clientID, version string, ctx *cli.Context) *eth.Config {
MaxPeers: ctx.GlobalInt(MaxPeersFlag.Name),
Port: ctx.GlobalString(ListenPortFlag.Name),
NAT: GetNAT(ctx),
NatSpec: ctx.GlobalBool(NatspecEnabledFlag.Name),
NodeKey: GetNodeKey(ctx),
Shh: true,
Dial: true,

17
common/bytes.go
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@ -147,6 +147,23 @@ func Hex2Bytes(str string) []byte {
return h
}
func Hex2BytesFixed(str string, flen int) []byte {
h, _ := hex.DecodeString(str)
if len(h) == flen {
return h
} else {
if len(h) > flen {
return h[len(h)-flen : len(h)]
} else {
hh := make([]byte, flen)
copy(hh[flen-len(h):flen], h[:])
return hh
}
}
}
func StringToByteFunc(str string, cb func(str string) []byte) (ret []byte) {
if len(str) > 1 && str[0:2] == "0x" && !strings.Contains(str, "\n") {
ret = Hex2Bytes(str[2:])

82
common/docserver/docserver.go Normal file
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@ -0,0 +1,82 @@
package docserver
import (
"fmt"
"io/ioutil"
"net/http"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)
// http://golang.org/pkg/net/http/#RoundTripper
var (
schemes = map[string]func(*DocServer) http.RoundTripper{
// Simple File server from local disk file:///etc/passwd :)
"file": fileServerOnDocRoot,
}
)
func fileServerOnDocRoot(ds *DocServer) http.RoundTripper {
return http.NewFileTransport(http.Dir(ds.DocRoot))
}
type DocServer struct {
*http.Transport
DocRoot string
}
func New(docRoot string) (self *DocServer, err error) {
self = &DocServer{
Transport: &http.Transport{},
DocRoot: docRoot,
}
err = self.RegisterProtocols(schemes)
return
}
// Clients should be reused instead of created as needed. Clients are safe for concurrent use by multiple goroutines.
// A Client is higher-level than a RoundTripper (such as Transport) and additionally handles HTTP details such as cookies and redirects.
func (self *DocServer) Client() *http.Client {
return &http.Client{
Transport: self,
}
}
func (self *DocServer) RegisterProtocols(schemes map[string]func(*DocServer) http.RoundTripper) (err error) {
for scheme, rtf := range schemes {
self.RegisterProtocol(scheme, rtf(self))
}
return
}
func (self *DocServer) GetAuthContent(uri string, hash common.Hash) (content []byte, err error) {
// retrieve content
resp, err := self.Client().Get(uri)
defer func() {
if resp != nil {
resp.Body.Close()
}
}()
if err != nil {
return
}
content, err = ioutil.ReadAll(resp.Body)
if err != nil {
return
}
// check hash to authenticate content
hashbytes := crypto.Sha3(content)
var chash common.Hash
copy(chash[:], hashbytes)
if chash != hash {
content = nil
err = fmt.Errorf("content hash mismatch")
}
return
}

38
common/docserver/docserver_test.go Normal file
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@ -0,0 +1,38 @@
package docserver
import (
"io/ioutil"
"os"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)
func TestGetAuthContent(t *testing.T) {
text := "test"
hash := common.Hash{}
copy(hash[:], crypto.Sha3([]byte(text)))
ioutil.WriteFile("/tmp/test.content", []byte(text), os.ModePerm)
ds, err := New("/tmp/")
content, err := ds.GetAuthContent("file:///test.content", hash)
if err != nil {
t.Errorf("no error expected, got %v", err)
}
if string(content) != text {
t.Errorf("incorrect content. expected %v, got %v", text, string(content))
}
hash = common.Hash{}
content, err = ds.GetAuthContent("file:///test.content", hash)
expected := "content hash mismatch"
if err == nil {
t.Errorf("expected error, got nothing")
} else {
if err.Error() != expected {
t.Errorf("expected error '%s' got '%v'", expected, err)
}
}
}

195
common/natspec/natspec.go
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@ -1,20 +1,137 @@
package natspec
import (
"bytes"
"encoding/json"
"fmt"
"github.com/robertkrimen/otto"
"strings"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/docserver"
"github.com/ethereum/go-ethereum/common/resolver"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/xeth"
)
type abi2method map[[8]byte]*method
type NatSpec struct {
jsvm *otto.Otto
jsvm *otto.Otto
userDocJson, abiDocJson []byte
userDoc userDoc
tx, data string
// abiDoc abiDoc
}
// TODO: should initialise with abi and userdoc jsons
func New() (self *NatSpec, err error) {
func getFallbackNotice(comment, tx string) string {
self = new(NatSpec)
self.jsvm = otto.New()
return "About to submit transaction (" + comment + "): " + tx
}
func GetNotice(xeth *xeth.XEth, tx string, http *docserver.DocServer) (notice string) {
ns, err := New(xeth, tx, http)
if err != nil {
if ns == nil {
return getFallbackNotice("no NatSpec info found for contract", tx)
} else {
return getFallbackNotice("invalid NatSpec info", tx)
}
}
notice, err2 := ns.Notice()
if err2 != nil {
return getFallbackNotice("NatSpec notice error \""+err2.Error()+"\"", tx)
}
return
}
func New(xeth *xeth.XEth, tx string, http *docserver.DocServer) (self *NatSpec, err error) {
// extract contract address from tx
var obj map[string]json.RawMessage
err = json.Unmarshal([]byte(tx), &obj)
if err != nil {
return
}
var tmp []map[string]string
err = json.Unmarshal(obj["params"], &tmp)
if err != nil {
return
}
contractAddress := tmp[0]["to"]
// retrieve contract hash from state
if !xeth.IsContract(contractAddress) {
err = fmt.Errorf("NatSpec error: contract not found")
return
}
codehex := xeth.CodeAt(contractAddress)
codeHash := common.BytesToHash(crypto.Sha3(common.Hex2Bytes(codehex[2:])))
// parse out host/domain
// set up nameresolver with natspecreg + urlhint contract addresses
res := resolver.New(
xeth,
resolver.URLHintContractAddress,
resolver.HashRegContractAddress,
)
// resolve host via HashReg/UrlHint Resolver
uri, hash, err := res.KeyToUrl(codeHash)
if err != nil {
return
}
// get content via http client and authenticate content using hash
content, err := http.GetAuthContent(uri, hash)
if err != nil {
return
}
// get abi, userdoc
var obj2 map[string]json.RawMessage
err = json.Unmarshal(content, &obj2)
if err != nil {
return
}
abi := []byte(obj2["abi"])
userdoc := []byte(obj2["userdoc"])
self, err = NewWithDocs(abi, userdoc, tx)
return
}
func NewWithDocs(abiDocJson, userDocJson []byte, tx string) (self *NatSpec, err error) {
var obj map[string]json.RawMessage
err = json.Unmarshal([]byte(tx), &obj)
if err != nil {
return
}
var tmp []map[string]string
err = json.Unmarshal(obj["params"], &tmp)
if err != nil {
return
}
data := tmp[0]["data"]
self = &NatSpec{
jsvm: otto.New(),
abiDocJson: abiDocJson,
userDocJson: userDocJson,
tx: tx,
data: data,
}
// load and require natspec js (but it is meant to be protected environment)
_, err = self.jsvm.Run(natspecJS)
if err != nil {
return
@ -24,20 +141,78 @@ func New() (self *NatSpec, err error) {
return
}
err = json.Unmarshal(userDocJson, &self.userDoc)
// err = parseAbiJson(abiDocJson, &self.abiDoc)
return
}
func (self *NatSpec) Notice(transaction, abi, method, expression string) (string, error) {
var err error
if _, err = self.jsvm.Run("var transaction = " + transaction + ";"); err != nil {
// type abiDoc []method
// type method struct {
// Name string `json:name`
// Inputs []input `json:inputs`
// abiKey [8]byte
// }
// type input struct {
// Name string `json:name`
// Type string `json:type`
// }
// json skeleton for abi doc (contract method definitions)
type method struct {
Notice string `json:notice`
name string
}
type userDoc struct {
Methods map[string]*method `json:methods`
}
func (self *NatSpec) makeAbi2method(abiKey [8]byte) (meth *method) {
for signature, m := range self.userDoc.Methods {
name := strings.Split(signature, "(")[0]
hash := []byte(common.Bytes2Hex(crypto.Sha3([]byte(signature))))
var key [8]byte
copy(key[:], hash[:8])
if bytes.Equal(key[:], abiKey[:]) {
meth = m
meth.name = name
return
}
}
return
}
func (self *NatSpec) Notice() (notice string, err error) {
var abiKey [8]byte
if len(self.data) < 10 {
err = fmt.Errorf("Invalid transaction data")
return
}
copy(abiKey[:], self.data[2:10])
meth := self.makeAbi2method(abiKey)
if meth == nil {
err = fmt.Errorf("abi key does not match any method")
return
}
notice, err = self.noticeForMethod(self.tx, meth.name, meth.Notice)
return
}
func (self *NatSpec) noticeForMethod(tx string, name, expression string) (notice string, err error) {
if _, err = self.jsvm.Run("var transaction = " + tx + ";"); err != nil {
return "", fmt.Errorf("natspec.js error setting transaction: %v", err)
}
if _, err = self.jsvm.Run("var abi = " + abi + ";"); err != nil {
if _, err = self.jsvm.Run("var abi = " + string(self.abiDocJson) + ";"); err != nil {
return "", fmt.Errorf("natspec.js error setting abi: %v", err)
}
if _, err = self.jsvm.Run("var method = '" + method + "';"); err != nil {
if _, err = self.jsvm.Run("var method = '" + name + "';"); err != nil {
return "", fmt.Errorf("natspec.js error setting method: %v", err)
}

340
common/natspec/natspec_e2e_test.go Normal file
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@ -0,0 +1,340 @@
package natspec
import (
"io/ioutil"
"math/big"
"os"
"testing"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/docserver"
"github.com/ethereum/go-ethereum/common/resolver"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/rpc"
xe "github.com/ethereum/go-ethereum/xeth"
)
type testFrontend struct {
t *testing.T
ethereum *eth.Ethereum
xeth *xe.XEth
api *rpc.EthereumApi
coinbase string
stateDb *state.StateDB
txc uint64
lastConfirm string
makeNatSpec bool
}
const (
testAccount = "e273f01c99144c438695e10f24926dc1f9fbf62d"
testBalance = "1000000000000"
)
const testFileName = "long_file_name_for_testing_registration_of_URLs_longer_than_32_bytes.content"
const testNotice = "Register key `utils.toHex(_key)` <- content `utils.toHex(_content)`"
const testExpNotice = "Register key 0xadd1a7d961cff0242089674ec2ef6fca671ab15e1fe80e38859fc815b98d88ab <- content 0xc00d5bcc872e17813df6ec5c646bb281a6e2d3b454c2c400c78192adf3344af9"
const testExpNotice2 = `About to submit transaction (NatSpec notice error "abi key does not match any method"): {"id":6,"jsonrpc":"2.0","method":"eth_transact","params":[{"from":"0xe273f01c99144c438695e10f24926dc1f9fbf62d","to":"0xb737b91f8e95cf756766fc7c62c9a8ff58470381","value":"100000000000","gas":"100000","gasPrice":"100000","data":"0x31e12c20"}]}`
const testExpNotice3 = `About to submit transaction (no NatSpec info found for contract): {"id":6,"jsonrpc":"2.0","method":"eth_transact","params":[{"from":"0xe273f01c99144c438695e10f24926dc1f9fbf62d","to":"0x8b839ad85686967a4f418eccc81962eaee314ac3","value":"100000000000","gas":"100000","gasPrice":"100000","data":"0x300a3bbfc00d5bcc872e17813df6ec5c646bb281a6e2d3b454c2c400c78192adf3344af900000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000"}]}`
const testUserDoc = `
{
"source": "...",
"language": "Solidity",
"languageVersion": 1,
"methods": {
"register(uint256,uint256)": {
"notice": "` + testNotice + `"
}
},
"invariants": [
{ "notice": "" }
],
"construction": [
{ "notice": "" }
]
}
`
const testABI = `
[{
"name": "register",
"constant": false,
"type": "function",
"inputs": [{
"name": "_key",
"type": "uint256"
}, {
"name": "_content",
"type": "uint256"
}],
"outputs": []
}]
`
const testDocs = `
{
"userdoc": ` + testUserDoc + `,
"abi": ` + testABI + `
}
`
func (f *testFrontend) UnlockAccount(acc []byte) bool {
f.t.Logf("Unlocking account %v\n", common.Bytes2Hex(acc))
f.ethereum.AccountManager().Unlock(acc, "password")
return true
}
func (f *testFrontend) ConfirmTransaction(tx string) bool {
//f.t.Logf("ConfirmTransaction called tx = %v", tx)
if f.makeNatSpec {
ds, err := docserver.New("/tmp/")
if err != nil {
f.t.Errorf("Error creating DocServer: %v", err)
}
f.lastConfirm = GetNotice(f.xeth, tx, ds)
}
return true
}
var port = 30300
func testEth(t *testing.T) (ethereum *eth.Ethereum, err error) {
os.RemoveAll("/tmp/eth-natspec/")
err = os.MkdirAll("/tmp/eth-natspec/keys/e273f01c99144c438695e10f24926dc1f9fbf62d/", os.ModePerm)
if err != nil {
t.Errorf("%v", err)
return
}
err = os.MkdirAll("/tmp/eth-natspec/data", os.ModePerm)
if err != nil {
t.Errorf("%v", err)
return
}
ks := crypto.NewKeyStorePlain("/tmp/eth-natspec/keys")
ioutil.WriteFile("/tmp/eth-natspec/keys/e273f01c99144c438695e10f24926dc1f9fbf62d/e273f01c99144c438695e10f24926dc1f9fbf62d",
[]byte(`{"Id":"RhRXD+fNRKS4jx+7ZfEsNA==","Address":"4nPwHJkUTEOGleEPJJJtwfn79i0=","PrivateKey":"h4ACVpe74uIvi5Cg/2tX/Yrm2xdr3J7QoMbMtNX2CNc="}`), os.ModePerm)
port++
ethereum, err = eth.New(&eth.Config{
DataDir: "/tmp/eth-natspec",
AccountManager: accounts.NewManager(ks),
Name: "test",
})
if err != nil {
t.Errorf("%v", err)
return
}
return
}
func testInit(t *testing.T) (self *testFrontend) {
core.GenesisData = []byte(`{
"` + testAccount + `": {"balance": "` + testBalance + `"}
}`)
ethereum, err := testEth(t)
if err != nil {
t.Errorf("error creating ethereum: %v", err)
return
}
err = ethereum.Start()
if err != nil {
t.Errorf("error starting ethereum: %v", err)
return
}
self = &testFrontend{t: t, ethereum: ethereum}
self.xeth = xe.New(ethereum, self)
self.api = rpc.NewEthereumApi(self.xeth)
addr := self.xeth.Coinbase()
self.coinbase = addr
if addr != "0x"+testAccount {
t.Errorf("CoinBase %v does not match TestAccount 0x%v", addr, testAccount)
}
t.Logf("CoinBase is %v", addr)
balance := self.xeth.BalanceAt(testAccount)
/*if balance != core.TestBalance {
t.Errorf("Balance %v does not match TestBalance %v", balance, core.TestBalance)
}*/
t.Logf("Balance is %v", balance)
self.stateDb = self.ethereum.ChainManager().State().Copy()
return
}
func (self *testFrontend) insertTx(addr, contract, fnsig string, args []string) {
//cb := common.HexToAddress(self.coinbase)
//coinbase := self.ethereum.ChainManager().State().GetStateObject(cb)
hash := common.Bytes2Hex(crypto.Sha3([]byte(fnsig)))
data := "0x" + hash[0:8]
for _, arg := range args {
data = data + common.Bytes2Hex(common.Hex2BytesFixed(arg, 32))
}
self.t.Logf("Tx data: %v", data)
jsontx := `
[{
"from": "` + addr + `",
"to": "` + contract + `",
"value": "100000000000",
"gas": "100000",
"gasPrice": "100000",
"data": "` + data + `"
}]
`
req := &rpc.RpcRequest{
Jsonrpc: "2.0",
Method: "eth_transact",
Params: []byte(jsontx),
Id: 6,
}
var reply interface{}
err0 := self.api.GetRequestReply(req, &reply)
if err0 != nil {
self.t.Errorf("GetRequestReply error: %v", err0)
}
//self.xeth.Transact(addr, contract, "100000000000", "100000", "100000", data)
}
func (self *testFrontend) applyTxs() {
cb := common.HexToAddress(self.coinbase)
block := self.ethereum.ChainManager().NewBlock(cb)
coinbase := self.stateDb.GetStateObject(cb)
coinbase.SetGasPool(big.NewInt(10000000))
txs := self.ethereum.TxPool().GetTransactions()
for i := 0; i < len(txs); i++ {
for _, tx := range txs {
//self.t.Logf("%v %v %v", i, tx.Nonce(), self.txc)
if tx.Nonce() == self.txc {
_, gas, err := core.ApplyMessage(core.NewEnv(self.stateDb, self.ethereum.ChainManager(), tx, block), tx, coinbase)
//self.ethereum.TxPool().RemoveSet([]*types.Transaction{tx})
self.t.Logf("ApplyMessage: gas %v err %v", gas, err)
self.txc++
}
}
}
//self.ethereum.TxPool().RemoveSet(txs)
self.xeth = self.xeth.WithState(self.stateDb)
}
func (self *testFrontend) registerURL(hash common.Hash, url string) {
hashHex := common.Bytes2Hex(hash[:])
urlBytes := []byte(url)
var bb bool = true
var cnt byte
for bb {
bb = len(urlBytes) > 0
urlb := urlBytes
if len(urlb) > 32 {
urlb = urlb[:32]
}
urlHex := common.Bytes2Hex(urlb)
self.insertTx(self.coinbase, resolver.URLHintContractAddress, "register(uint256,uint8,uint256)", []string{hashHex, common.Bytes2Hex([]byte{cnt}), urlHex})
if len(urlBytes) > 32 {
urlBytes = urlBytes[32:]
} else {
urlBytes = nil
}
cnt++
}
}
func (self *testFrontend) setOwner() {
self.insertTx(self.coinbase, resolver.HashRegContractAddress, "setowner()", []string{})
/*owner := self.xeth.StorageAt("0x"+resolver.HashRegContractAddress, "0x0000000000000000000000000000000000000000000000000000000000000000")
self.t.Logf("owner = %v", owner)
if owner != self.coinbase {
self.t.Errorf("setowner() unsuccessful, owner != coinbase")
}*/
}
func (self *testFrontend) registerNatSpec(codehash, dochash common.Hash) {
codeHex := common.Bytes2Hex(codehash[:])
docHex := common.Bytes2Hex(dochash[:])
self.insertTx(self.coinbase, resolver.HashRegContractAddress, "register(uint256,uint256)", []string{codeHex, docHex})
}
func (self *testFrontend) testResolver() *resolver.Resolver {
return resolver.New(self.xeth, resolver.URLHintContractAddress, resolver.HashRegContractAddress)
}
func TestNatspecE2E(t *testing.T) {
tf := testInit(t)
defer tf.ethereum.Stop()
resolver.CreateContracts(tf.xeth, testAccount)
t.Logf("URLHint contract registered at %v", resolver.URLHintContractAddress)
t.Logf("HashReg contract registered at %v", resolver.HashRegContractAddress)
tf.applyTxs()
ioutil.WriteFile("/tmp/"+testFileName, []byte(testDocs), os.ModePerm)
dochash := common.BytesToHash(crypto.Sha3([]byte(testDocs)))
codehex := tf.xeth.CodeAt(resolver.HashRegContractAddress)
codehash := common.BytesToHash(crypto.Sha3(common.Hex2Bytes(codehex[2:])))
tf.setOwner()
tf.registerNatSpec(codehash, dochash)
tf.registerURL(dochash, "file:///"+testFileName)
tf.applyTxs()
chash, err := tf.testResolver().KeyToContentHash(codehash)
if err != nil {
t.Errorf("Can't find content hash")
}
t.Logf("chash = %x err = %v", chash, err)
url, err2 := tf.testResolver().ContentHashToUrl(dochash)
if err2 != nil {
t.Errorf("Can't find URL hint")
}
t.Logf("url = %v err = %v", url, err2)
// NatSpec info for register method of HashReg contract installed
// now using the same transactions to check confirm messages
tf.makeNatSpec = true
tf.registerNatSpec(codehash, dochash)
t.Logf("Confirm message: %v\n", tf.lastConfirm)
if tf.lastConfirm != testExpNotice {
t.Errorf("Wrong confirm message, expected '%v', got '%v'", testExpNotice, tf.lastConfirm)
}
tf.setOwner()
t.Logf("Confirm message for unknown method: %v\n", tf.lastConfirm)
if tf.lastConfirm != testExpNotice2 {
t.Errorf("Wrong confirm message, expected '%v', got '%v'", testExpNotice2, tf.lastConfirm)
}
tf.registerURL(dochash, "file:///test.content")
t.Logf("Confirm message for unknown contract: %v\n", tf.lastConfirm)
if tf.lastConfirm != testExpNotice3 {
t.Errorf("Wrong confirm message, expected '%v', got '%v'", testExpNotice3, tf.lastConfirm)
}
}

4042
common/natspec/natspec_js.go
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File diff suppressed because one or more lines are too long

168
common/natspec/natspec_test.go
View File

@ -4,75 +4,98 @@ import (
"testing"
)
func makeUserdoc(desc string) []byte {
return []byte(`
{
"source": "...",
"language": "Solidity",
"languageVersion": 1,
"methods": {
"multiply(uint256)": {
"notice": "` + desc + `"
},
"balance(address)": {
"notice": "` + "`(balanceInmGAV / 1000).fixed(0,3)`" + ` GAV is the total funds available to ` + "`who.address()`." + `"
}
},
"invariants": [
{ "notice": "The sum total amount of GAV in the system is 1 million." }
],
"construction": [
{ "notice": "Endows ` + "`message.caller.address()`" + ` with 1m GAV." }
]
}
`)
}
var data = "0xc6888fa1000000000000000000000000000000000000000000000000000000000000007a"
var tx = `
{
"jsonrpc": "2.0",
"method": "eth_call",
"params": [{
"to": "0x8521742d3f456bd237e312d6e30724960f72517a",
"data": "0xc6888fa1000000000000000000000000000000000000000000000000000000000000007a"
}],
"id": 6
}
`
var abi = []byte(`
[{
"name": "multiply",
"constant": false,
"type": "function",
"inputs": [{
"name": "a",
"type": "uint256"
}],
"outputs": [{
"name": "d",
"type": "uint256"
}]
}]
`)
func TestNotice(t *testing.T) {
tx := `
{
"jsonrpc": "2.0",
"method": "eth_call",
"params": [{
"to": "0x8521742d3f456bd237e312d6e30724960f72517a",
"data": "0xc6888fa1000000000000000000000000000000000000000000000000000000000000007a"
}],
"id": 6
}
`
abi := `
[{
"name": "multiply",
"constant": false,
"type": "function",
"inputs": [{
"name": "a",
"type": "uint256"
}],
"outputs": [{
"name": "d",
"type": "uint256"
}]
}]
`
desc := "Will multiply `a` by 7 and return `a * 7`."
method := "multiply"
ns, err := New()
if err != nil {
t.Errorf("NewNATSpec error %v", err)
}
notice, err := ns.Notice(tx, abi, method, desc)
if err != nil {
t.Errorf("expected no error got %v", err)
}
expected := "Will multiply 122 by 7 and return 854."
userdoc := makeUserdoc(desc)
ns, err := NewWithDocs(abi, userdoc, tx)
if err != nil {
t.Errorf("New: error: %v", err)
}
notice, err := ns.Notice()
if err != nil {
t.Errorf("expected no error, got %v", err)
}
if notice != expected {
t.Errorf("incorrect notice. expected %v, got %v", expected, notice)
} else {
t.Logf("returned notice \"%v\"", notice)
}
}
notice, err = ns.Notice(tx, abi, method, "Will multiply 122 by \"7\" and return 854.")
// test missing method
func TestMissingMethod(t *testing.T) {
expected = "natspec.js error setting expression: (anonymous): Line 1:41 Unexpected number"
desc := "Will multiply `a` by 7 and return `a * 7`."
userdoc := makeUserdoc(desc)
expected := "natspec.js error evaluating expression: Natspec evaluation failed, method does not exist"
if err == nil {
t.Errorf("expected error, got nothing (notice: '%v')", err, notice)
} else {
if err.Error() != expected {
t.Errorf("expected error '%s' got '%v' (notice: '%v')", expected, err, notice)
}
ns, err := NewWithDocs(abi, userdoc, tx)
if err != nil {
t.Errorf("New: error: %v", err)
}
// https://github.com/ethereum/natspec.js/issues/1
badDesc := "Will multiply `e` by 7 and return `a * 7`."
notice, err = ns.Notice(tx, abi, method, badDesc)
expected = "natspec.js error evaluating expression: Natspec evaluation failed, wrong input params"
notice, err := ns.noticeForMethod(tx, "missing_method", "")
if err == nil {
t.Errorf("expected error, got nothing (notice: '%v')", notice)
@ -81,10 +104,41 @@ func TestNotice(t *testing.T) {
t.Errorf("expected error '%s' got '%v' (notice: '%v')", expected, err, notice)
}
}
}
notice, err = ns.Notice(tx, abi, "missing_method", desc)
// test invalid desc
expected = "natspec.js error evaluating expression: Natspec evaluation failed, method does not exist"
func TestInvalidDesc(t *testing.T) {
desc := "Will multiply 122 by \"7\" and return 854."
expected := "invalid character '7' after object key:value pair"
userdoc := makeUserdoc(desc)
_, err := NewWithDocs(abi, userdoc, tx)
if err == nil {
t.Errorf("expected error, got nothing", err)
} else {
if err.Error() != expected {
t.Errorf("expected error '%s' got '%v'", expected, err)
}
}
}
// test wrong input params
func TestWrongInputParams(t *testing.T) {
desc := "Will multiply `e` by 7 and return `a * 7`."
expected := "natspec.js error evaluating expression: Natspec evaluation failed, wrong input params"
userdoc := makeUserdoc(desc)
ns, err := NewWithDocs(abi, userdoc, tx)
if err != nil {
t.Errorf("New: error: %v", err)
}
notice, err := ns.Notice()
if err == nil {
t.Errorf("expected error, got nothing (notice: '%v')", notice)

36
common/resolver/contracts.go Normal file
View File

@ -0,0 +1,36 @@
package resolver
const ( // built-in contracts address and code
ContractCodeURLhint = "0x60c180600c6000396000f30060003560e060020a90048063300a3bbf14601557005b6024600435602435604435602a565b60006000f35b6000600084815260200190815260200160002054600160a060020a0316600014806078575033600160a060020a03166000600085815260200190815260200160002054600160a060020a0316145b607f5760bc565b336000600085815260200190815260200160002081905550806001600085815260200190815260200160002083610100811060b657005b01819055505b50505056"
/*
contract URLhint {
function register(uint256 _hash, uint8 idx, uint256 _url) {
if (owner[_hash] == 0 || owner[_hash] == msg.sender) {
owner[_hash] = msg.sender;
url[_hash][idx] = _url;
}
}
mapping (uint256 => address) owner;
mapping (uint256 => uint256[256]) url;
}
*/
ContractCodeHashReg = "0x609880600c6000396000f30060003560e060020a9004806331e12c2014601f578063d66d6c1014602b57005b6025603d565b60006000f35b6037600435602435605d565b60006000f35b600054600160a060020a0316600014605357605b565b336000819055505b565b600054600160a060020a031633600160a060020a031614607b576094565b8060016000848152602001908152602001600020819055505b505056"
/*
contract HashReg {
function setowner() {
if (owner == 0) {
owner = msg.sender;
}
}
function register(uint256 _key, uint256 _content) {
if (msg.sender == owner) {
content[_key] = _content;
}
}
address owner;
mapping (uint256 => uint256) content;
}
*/
)

128
common/resolver/resolver.go Normal file
View File

@ -0,0 +1,128 @@
package resolver
import (
"encoding/binary"
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
xe "github.com/ethereum/go-ethereum/xeth"
)
/*
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 string = "0000000000000000000000000000000000000000000000000000000000001234"
var HashRegContractAddress string = "0000000000000000000000000000000000000000000000000000000000005678"
func CreateContracts(xeth *xe.XEth, addr string) {
var err error
URLHintContractAddress, err = xeth.Transact(addr, "", "100000000000", "1000000", "100000", ContractCodeURLhint)
if err != nil {
panic(err)
}
HashRegContractAddress, err = xeth.Transact(addr, "", "100000000000", "1000000", "100000", ContractCodeHashReg)
if err != nil {
panic(err)
}
}
type Resolver struct {
backend Backend
urlHintContractAddress string
hashRegContractAddress string
}
type Backend interface {
StorageAt(string, string) string
}
func New(eth Backend, uhca, nrca string) *Resolver {
return &Resolver{eth, uhca, nrca}
}
func (self *Resolver) KeyToContentHash(khash common.Hash) (chash common.Hash, err error) {
// look up in hashReg
key := storageAddress(storageMapping(storageIdx2Addr(1), khash[:]))
hash := self.backend.StorageAt(self.hashRegContractAddress, key)
if hash == "0x0" || len(hash) < 3 {
err = fmt.Errorf("GetHashReg: content hash not found")
return
}
copy(chash[:], common.Hex2BytesFixed(hash[2:], 32))
return
}
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(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++
}
if len(uri) == 0 {
err = fmt.Errorf("GetURLhint: URL hint not found")
}
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])
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 common.ToHex(addr)
}

88
common/resolver/resolver_test.go Normal file
View File

@ -0,0 +1,88 @@
package resolver
import (
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)
type testBackend struct {
// contracts mock
contracts map[string](map[string]string)
}
var (
text = "test"
codehash = common.StringToHash("1234")
hash = common.BytesToHash(crypto.Sha3([]byte(text)))
url = "bzz://bzzhash/my/path/contr.act"
)
func NewTestBackend() *testBackend {
self := &testBackend{}
self.contracts = make(map[string](map[string]string))
self.contracts[HashRegContractAddress] = make(map[string]string)
key := storageAddress(storageMapping(storageIdx2Addr(1), codehash[:]))
self.contracts[HashRegContractAddress][key] = hash.Hex()
self.contracts[URLHintContractAddress] = make(map[string]string)
mapaddr := storageMapping(storageIdx2Addr(1), hash[:])
key = storageAddress(storageFixedArray(mapaddr, storageIdx2Addr(0)))
self.contracts[URLHintContractAddress][key] = common.ToHex([]byte(url))
key = storageAddress(storageFixedArray(mapaddr, storageIdx2Addr(1)))
self.contracts[URLHintContractAddress][key] = "0x00"
return self
}
func (self *testBackend) StorageAt(ca, sa string) (res string) {
c := self.contracts[ca]
if c == nil {
return
}
res = c[sa]
return
}
func TestKeyToContentHash(t *testing.T) {
b := NewTestBackend()
res := New(b, URLHintContractAddress, HashRegContractAddress)
got, err := res.KeyToContentHash(codehash)
if err != nil {
t.Errorf("expected no error, got %v", err)
} else {
if got != hash {
t.Errorf("incorrect result, expected %x, got %x: ", hash.Hex(), got.Hex())
}
}
}
func TestContentHashToUrl(t *testing.T) {
b := NewTestBackend()
res := New(b, URLHintContractAddress, HashRegContractAddress)
got, err := res.ContentHashToUrl(hash)
if err != nil {
t.Errorf("expected no error, got %v", err)
} else {
if string(got) != url {
t.Errorf("incorrect result, expected %v, got %s: ", url, string(got))
}
}
}
func TestKeyToUrl(t *testing.T) {
b := NewTestBackend()
res := New(b, URLHintContractAddress, HashRegContractAddress)
got, _, err := res.KeyToUrl(codehash)
if err != nil {
t.Errorf("expected no error, got %v", err)
} else {
if string(got) != url {
t.Errorf("incorrect result, expected %v, got %s: ", url, string(got))
}
}
}

4
core/genesis.go
View File

@ -36,7 +36,7 @@ func GenesisBlock(db common.Database) *types.Block {
Balance string
Code string
}
err := json.Unmarshal(genesisData, &accounts)
err := json.Unmarshal(GenesisData, &accounts)
if err != nil {
fmt.Println("enable to decode genesis json data:", err)
os.Exit(1)
@ -57,7 +57,7 @@ func GenesisBlock(db common.Database) *types.Block {
return genesis
}
var genesisData = []byte(`{
var GenesisData = []byte(`{
"0000000000000000000000000000000000000001": {"balance": "1"},
"0000000000000000000000000000000000000002": {"balance": "1"},
"0000000000000000000000000000000000000003": {"balance": "1"},

3
eth/backend.go
View File

@ -50,6 +50,7 @@ type Config struct {
LogLevel int
LogJSON string
VmDebug bool
NatSpec bool
MaxPeers int
Port string
@ -144,6 +145,7 @@ type Ethereum struct {
// logger logger.LogSystem
Mining bool
NatSpec bool
DataDir string
etherbase common.Address
clientVersion string
@ -205,6 +207,7 @@ func New(config *Config) (*Ethereum, error) {
clientVersion: config.Name, // TODO should separate from Name
ethVersionId: config.ProtocolVersion,
netVersionId: config.NetworkId,
NatSpec: config.NatSpec,
}
eth.chainManager = core.NewChainManager(blockDb, stateDb, eth.EventMux())

8
rpc/api.go
View File

@ -2,7 +2,7 @@ package rpc
import (
"encoding/json"
// "fmt"
"fmt"
"math/big"
"sync"
@ -167,6 +167,12 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
return err
}
// call ConfirmTransaction first
tx, _ := json.Marshal(req)
if !api.xeth().ConfirmTransaction(string(tx)) {
return fmt.Errorf("Transaction not confirmed")
}
v, err := api.xeth().Transact(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
if err != nil {
return err

10
xeth/frontend.go
View File

@ -1,9 +1,5 @@
package xeth
import (
"github.com/ethereum/go-ethereum/core/types"
)
// Frontend should be implemented by users of XEth. Its methods are
// called whenever XEth makes a decision that requires user input.
type Frontend interface {
@ -21,12 +17,12 @@ type Frontend interface {
//
// ConfirmTransaction is not used for Call transactions
// because they cannot change any state.
ConfirmTransaction(tx *types.Transaction) bool
ConfirmTransaction(tx string) bool
}
// dummyFrontend is a non-interactive frontend that allows all
// transactions but cannot not unlock any keys.
type dummyFrontend struct{}
func (dummyFrontend) UnlockAccount([]byte) bool { return false }
func (dummyFrontend) ConfirmTransaction(*types.Transaction) bool { return true }
func (dummyFrontend) UnlockAccount([]byte) bool { return false }
func (dummyFrontend) ConfirmTransaction(string) bool { return true }

10
xeth/xeth.go
View File

@ -148,10 +148,10 @@ func (self *XEth) AtStateNum(num int64) *XEth {
}
}
return self.withState(st)
return self.WithState(st)
}
func (self *XEth) withState(statedb *state.StateDB) *XEth {
func (self *XEth) WithState(statedb *state.StateDB) *XEth {
xeth := &XEth{
backend: self.backend,
}
@ -608,6 +608,12 @@ func (self *XEth) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr st
return common.ToHex(res), err
}
func (self *XEth) ConfirmTransaction(tx string) bool {
return self.frontend.ConfirmTransaction(tx)
}
func (self *XEth) Transact(fromStr, toStr, valueStr, gasStr, gasPriceStr, codeStr string) (string, error) {
var (
from = common.HexToAddress(fromStr)