diff --git a/cmd/swarm/main.go b/cmd/swarm/main.go
index 603fd9b94130b03323aca618a0dc5a864a58f896..98a0352dcaf654873da82245db4a9252edccc41a 100644
--- a/cmd/swarm/main.go
+++ b/cmd/swarm/main.go
@@ -17,11 +17,9 @@
package main
import (
- "context"
"crypto/ecdsa"
"fmt"
"io/ioutil"
- "math/big"
"os"
"os/signal"
"runtime"
@@ -29,14 +27,13 @@ import (
"strconv"
"strings"
"syscall"
- "time"
+ "unicode"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/accounts/keystore"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/console"
- "github.com/ethereum/go-ethereum/contracts/ens"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethclient"
"github.com/ethereum/go-ethereum/internal/debug"
@@ -45,7 +42,6 @@ import (
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/params"
- "github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum/go-ethereum/swarm"
bzzapi "github.com/ethereum/go-ethereum/swarm/api"
"gopkg.in/urfave/cli.v1"
@@ -101,6 +97,10 @@ var (
Name: "sync",
Usage: "Swarm Syncing enabled (default true)",
}
+ EnsEndpointsFlag = cli.StringSliceFlag{
+ Name: "ens-endpoint",
+ Usage: "ENS API endpoint for a TLD and with contract address, can be repeated, format [tld:][contract-addr@]url",
+ }
EnsAPIFlag = cli.StringFlag{
Name: "ens-api",
Usage: "URL of the Ethereum API provider to use for ENS record lookups",
@@ -323,6 +323,7 @@ DEPRECATED: use 'swarm db clean'.
utils.PasswordFileFlag,
// bzzd-specific flags
CorsStringFlag,
+ EnsEndpointsFlag,
EnsAPIFlag,
EnsAddrFlag,
SwarmConfigPathFlag,
@@ -416,38 +417,6 @@ func bzzd(ctx *cli.Context) error {
return nil
}
-// detectEnsAddr determines the ENS contract address by getting both the
-// version and genesis hash using the client and matching them to either
-// mainnet or testnet addresses
-func detectEnsAddr(client *rpc.Client) (common.Address, error) {
- ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
- defer cancel()
-
- var version string
- if err := client.CallContext(ctx, &version, "net_version"); err != nil {
- return common.Address{}, err
- }
-
- block, err := ethclient.NewClient(client).BlockByNumber(ctx, big.NewInt(0))
- if err != nil {
- return common.Address{}, err
- }
-
- switch {
-
- case version == "1" && block.Hash() == params.MainnetGenesisHash:
- log.Info("using Mainnet ENS contract address", "addr", ens.MainNetAddress)
- return ens.MainNetAddress, nil
-
- case version == "3" && block.Hash() == params.TestnetGenesisHash:
- log.Info("using Testnet ENS contract address", "addr", ens.TestNetAddress)
- return ens.TestNetAddress, nil
-
- default:
- return common.Address{}, fmt.Errorf("unknown version and genesis hash: %s %s", version, block.Hash())
- }
-}
-
func registerBzzService(ctx *cli.Context, stack *node.Node) {
prvkey := getAccount(ctx, stack)
@@ -476,6 +445,7 @@ func registerBzzService(ctx *cli.Context, stack *node.Node) {
utils.Fatalf("SWAP is enabled but --swap-api is not set")
}
+ ensEndpoints := ctx.GlobalStringSlice(EnsEndpointsFlag.Name)
ensapi := ctx.GlobalString(EnsAPIFlag.Name)
ensAddr := ctx.GlobalString(EnsAddrFlag.Name)
@@ -491,34 +461,59 @@ func registerBzzService(ctx *cli.Context, stack *node.Node) {
}
}
- var ensClient *ethclient.Client
+ ensClientConfigs := []swarm.ENSClientConfig{}
if ensapi != "" {
- log.Info("connecting to ENS API", "url", ensapi)
- client, err := rpc.Dial(ensapi)
- if err != nil {
- return nil, fmt.Errorf("error connecting to ENS API %s: %s", ensapi, err)
- }
- ensClient = ethclient.NewClient(client)
-
- if ensAddr != "" {
- bzzconfig.EnsRoot = common.HexToAddress(ensAddr)
- } else {
- ensAddr, err := detectEnsAddr(client)
- if err == nil {
- bzzconfig.EnsRoot = ensAddr
- } else {
- log.Warn(fmt.Sprintf("could not determine ENS contract address, using default %s", bzzconfig.EnsRoot), "err", err)
+ ensClientConfigs = append(ensClientConfigs, swarm.ENSClientConfig{
+ Endpoint: ensapi,
+ ContractAddress: ensAddr,
+ })
+ }
+ if ensEndpoints != nil {
+ for _, s := range ensEndpoints {
+ if s != "" {
+ ensClientConfigs = append(ensClientConfigs, parseFlagEnsEndpoint(s))
}
}
}
+ if len(ensClientConfigs) == 0 {
+ log.Warn("No ENS, please specify non-empty --ens-api or --ens-endpoint to use domain name resolution")
+ }
- return swarm.NewSwarm(ctx, swapClient, ensClient, bzzconfig, swapEnabled, syncEnabled, cors)
+ return swarm.NewSwarm(ctx, swapClient, ensClientConfigs, bzzconfig, swapEnabled, syncEnabled, cors)
}
if err := stack.Register(boot); err != nil {
utils.Fatalf("Failed to register the Swarm service: %v", err)
}
}
+func parseFlagEnsEndpoint(s string) swarm.ENSClientConfig {
+ isAllLetterString := func(s string) bool {
+ for _, r := range s {
+ if !unicode.IsLetter(r) {
+ return false
+ }
+ }
+ return true
+ }
+ endpoint := s
+ var addr, tld string
+ if i := strings.Index(endpoint, ":"); i > 0 {
+ if isAllLetterString(endpoint[:i]) && len(endpoint) > i+2 && endpoint[i+1:i+3] != "//" {
+ tld = endpoint[:i]
+ endpoint = endpoint[i+1:]
+ }
+ }
+ if i := strings.Index(endpoint, "@"); i > 0 {
+ addr = endpoint[:i]
+ endpoint = endpoint[i+1:]
+ }
+ return swarm.ENSClientConfig{
+ Endpoint: endpoint,
+ ContractAddress: addr,
+ TLD: tld,
+ }
+}
+
func getAccount(ctx *cli.Context, stack *node.Node) *ecdsa.PrivateKey {
keyid := ctx.GlobalString(SwarmAccountFlag.Name)
diff --git a/cmd/swarm/main_test.go b/cmd/swarm/main_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..054034434b4b1e14c5491027eb74783e406b3825
--- /dev/null
+++ b/cmd/swarm/main_test.go
@@ -0,0 +1,141 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+ "testing"
+
+ "github.com/ethereum/go-ethereum/swarm"
+)
+
+func TestParseFlagEnsEndpoint(t *testing.T) {
+ for _, x := range []struct {
+ description string
+ value string
+ config swarm.ENSClientConfig
+ }{
+ {
+ description: "IPC endpoint",
+ value: "/data/testnet/geth.ipc",
+ config: swarm.ENSClientConfig{
+ Endpoint: "/data/testnet/geth.ipc",
+ },
+ },
+ {
+ description: "HTTP endpoint",
+ value: "http://127.0.0.1:1234",
+ config: swarm.ENSClientConfig{
+ Endpoint: "http://127.0.0.1:1234",
+ },
+ },
+ {
+ description: "WS endpoint",
+ value: "ws://127.0.0.1:1234",
+ config: swarm.ENSClientConfig{
+ Endpoint: "ws://127.0.0.1:1234",
+ },
+ },
+ {
+ description: "IPC Endpoint and TLD",
+ value: "test:/data/testnet/geth.ipc",
+ config: swarm.ENSClientConfig{
+ Endpoint: "/data/testnet/geth.ipc",
+ TLD: "test",
+ },
+ },
+ {
+ description: "HTTP endpoint and TLD",
+ value: "test:http://127.0.0.1:1234",
+ config: swarm.ENSClientConfig{
+ Endpoint: "http://127.0.0.1:1234",
+ TLD: "test",
+ },
+ },
+ {
+ description: "WS endpoint and TLD",
+ value: "test:ws://127.0.0.1:1234",
+ config: swarm.ENSClientConfig{
+ Endpoint: "ws://127.0.0.1:1234",
+ TLD: "test",
+ },
+ },
+ {
+ description: "IPC Endpoint and contract address",
+ value: "314159265dD8dbb310642f98f50C066173C1259b@/data/testnet/geth.ipc",
+ config: swarm.ENSClientConfig{
+ Endpoint: "/data/testnet/geth.ipc",
+ ContractAddress: "314159265dD8dbb310642f98f50C066173C1259b",
+ },
+ },
+ {
+ description: "HTTP endpoint and contract address",
+ value: "314159265dD8dbb310642f98f50C066173C1259b@http://127.0.0.1:1234",
+ config: swarm.ENSClientConfig{
+ Endpoint: "http://127.0.0.1:1234",
+ ContractAddress: "314159265dD8dbb310642f98f50C066173C1259b",
+ },
+ },
+ {
+ description: "WS endpoint and contract address",
+ value: "314159265dD8dbb310642f98f50C066173C1259b@ws://127.0.0.1:1234",
+ config: swarm.ENSClientConfig{
+ Endpoint: "ws://127.0.0.1:1234",
+ ContractAddress: "314159265dD8dbb310642f98f50C066173C1259b",
+ },
+ },
+ {
+ description: "IPC Endpoint, TLD and contract address",
+ value: "test:314159265dD8dbb310642f98f50C066173C1259b@/data/testnet/geth.ipc",
+ config: swarm.ENSClientConfig{
+ Endpoint: "/data/testnet/geth.ipc",
+ ContractAddress: "314159265dD8dbb310642f98f50C066173C1259b",
+ TLD: "test",
+ },
+ },
+ {
+ description: "HTTP endpoint, TLD and contract address",
+ value: "eth:314159265dD8dbb310642f98f50C066173C1259b@http://127.0.0.1:1234",
+ config: swarm.ENSClientConfig{
+ Endpoint: "http://127.0.0.1:1234",
+ ContractAddress: "314159265dD8dbb310642f98f50C066173C1259b",
+ TLD: "eth",
+ },
+ },
+ {
+ description: "WS endpoint, TLD and contract address",
+ value: "eth:314159265dD8dbb310642f98f50C066173C1259b@ws://127.0.0.1:1234",
+ config: swarm.ENSClientConfig{
+ Endpoint: "ws://127.0.0.1:1234",
+ ContractAddress: "314159265dD8dbb310642f98f50C066173C1259b",
+ TLD: "eth",
+ },
+ },
+ } {
+ t.Run(x.description, func(t *testing.T) {
+ config := parseFlagEnsEndpoint(x.value)
+ if config.Endpoint != x.config.Endpoint {
+ t.Errorf("expected Endpoint %q, got %q", x.config.Endpoint, config.Endpoint)
+ }
+ if config.ContractAddress != x.config.ContractAddress {
+ t.Errorf("expected ContractAddress %q, got %q", x.config.ContractAddress, config.ContractAddress)
+ }
+ if config.TLD != x.config.TLD {
+ t.Errorf("expected TLD %q, got %q", x.config.TLD, config.TLD)
+ }
+ })
+ }
+}
diff --git a/swarm/api/api.go b/swarm/api/api.go
index 79de29a1cfcf54193197033e8be07befbab68e6a..d0c3754e00c18e055ae9c22680d8cd4261593693 100644
--- a/swarm/api/api.go
+++ b/swarm/api/api.go
@@ -17,6 +17,7 @@
package api
import (
+ "errors"
"fmt"
"io"
"net/http"
@@ -40,6 +41,69 @@ type Resolver interface {
Resolve(string) (common.Hash, error)
}
+// errNoResolver is returned by MultiResolver.Resolve if no resolver
+// can be found for the address.
+var errNoResolver = errors.New("no resolver")
+
+// MultiResolver is used to resolve URL addresses based on their TLDs.
+// Each TLD can have multiple resolvers, and the resoluton from the
+// first one in the sequence will be returned.
+type MultiResolver struct {
+ resolvers map[string][]Resolver
+}
+
+// MultiResolverOption sets options for MultiResolver and is used as
+// arguments for its constructor.
+type MultiResolverOption func(*MultiResolver)
+
+// MultiResolverOptionWithResolver adds a Resolver to a list of resolvers
+// for a specific TLD. If TLD is an empty string, the resolver will be added
+// to the list of default resolver, the ones that will be used for resolution
+// of addresses which do not have their TLD resolver specified.
+func MultiResolverOptionWithResolver(r Resolver, tld string) MultiResolverOption {
+ return func(m *MultiResolver) {
+ if _, ok := m.resolvers[tld]; !ok {
+ m.resolvers[tld] = []Resolver{}
+ }
+ m.resolvers[tld] = append(m.resolvers[tld], r)
+ }
+}
+
+// NewMultiResolver creates a new instance of MultiResolver.
+func NewMultiResolver(opts ...MultiResolverOption) (m *MultiResolver) {
+ m = &MultiResolver{
+ resolvers: map[string][]Resolver{},
+ }
+ for _, o := range opts {
+ o(m)
+ }
+ return m
+}
+
+// Resolve resolves address by choosing a Resolver by TLD.
+// If there are more default Resolvers, or for a specific TLD,
+// the Hash from the the first one which does not return error
+// will be returned.
+func (m MultiResolver) Resolve(addr string) (h common.Hash, err error) {
+ rs, _ := m.resolvers[""]
+ if i := strings.LastIndex(addr, "."); i >= 0 {
+ rstld, ok := m.resolvers[addr[i+1:]]
+ if ok {
+ rs = rstld
+ }
+ }
+ if rs == nil {
+ return h, errNoResolver
+ }
+ for _, r := range rs {
+ h, err = r.Resolve(addr)
+ if err == nil {
+ return
+ }
+ }
+ return
+}
+
/*
Api implements webserver/file system related content storage and retrieval
on top of the dpa
diff --git a/swarm/api/api_test.go b/swarm/api/api_test.go
index f9caed27f56a0a69168068ee4f905f014c2969c9..36cbdb83c52c33f3996214a59761cc3d33e59494 100644
--- a/swarm/api/api_test.go
+++ b/swarm/api/api_test.go
@@ -237,3 +237,120 @@ func TestAPIResolve(t *testing.T) {
})
}
}
+
+func TestMultiResolver(t *testing.T) {
+ doesntResolve := newTestResolver("")
+
+ ethAddr := "swarm.eth"
+ ethHash := "0x2222222222222222222222222222222222222222222222222222222222222222"
+ ethResolve := newTestResolver(ethHash)
+
+ testAddr := "swarm.test"
+ testHash := "0x1111111111111111111111111111111111111111111111111111111111111111"
+ testResolve := newTestResolver(testHash)
+
+ tests := []struct {
+ desc string
+ r Resolver
+ addr string
+ result string
+ err error
+ }{
+ {
+ desc: "No resolvers, returns error",
+ r: NewMultiResolver(),
+ err: errNoResolver,
+ },
+ {
+ desc: "One default resolver, returns resolved address",
+ r: NewMultiResolver(MultiResolverOptionWithResolver(ethResolve, "")),
+ addr: ethAddr,
+ result: ethHash,
+ },
+ {
+ desc: "Two default resolvers, returns resolved address",
+ r: NewMultiResolver(
+ MultiResolverOptionWithResolver(ethResolve, ""),
+ MultiResolverOptionWithResolver(ethResolve, ""),
+ ),
+ addr: ethAddr,
+ result: ethHash,
+ },
+ {
+ desc: "Two default resolvers, first doesn't resolve, returns resolved address",
+ r: NewMultiResolver(
+ MultiResolverOptionWithResolver(doesntResolve, ""),
+ MultiResolverOptionWithResolver(ethResolve, ""),
+ ),
+ addr: ethAddr,
+ result: ethHash,
+ },
+ {
+ desc: "Default resolver doesn't resolve, tld resolver resolve, returns resolved address",
+ r: NewMultiResolver(
+ MultiResolverOptionWithResolver(doesntResolve, ""),
+ MultiResolverOptionWithResolver(ethResolve, "eth"),
+ ),
+ addr: ethAddr,
+ result: ethHash,
+ },
+ {
+ desc: "Three TLD resolvers, third resolves, returns resolved address",
+ r: NewMultiResolver(
+ MultiResolverOptionWithResolver(doesntResolve, "eth"),
+ MultiResolverOptionWithResolver(doesntResolve, "eth"),
+ MultiResolverOptionWithResolver(ethResolve, "eth"),
+ ),
+ addr: ethAddr,
+ result: ethHash,
+ },
+ {
+ desc: "One TLD resolver doesn't resolve, returns error",
+ r: NewMultiResolver(
+ MultiResolverOptionWithResolver(doesntResolve, ""),
+ MultiResolverOptionWithResolver(ethResolve, "eth"),
+ ),
+ addr: ethAddr,
+ result: ethHash,
+ },
+ {
+ desc: "One defautl and one TLD resolver, all doesn't resolve, returns error",
+ r: NewMultiResolver(
+ MultiResolverOptionWithResolver(doesntResolve, ""),
+ MultiResolverOptionWithResolver(doesntResolve, "eth"),
+ ),
+ addr: ethAddr,
+ result: ethHash,
+ err: errors.New(`DNS name not found: "swarm.eth"`),
+ },
+ {
+ desc: "Two TLD resolvers, both resolve, returns resolved address",
+ r: NewMultiResolver(
+ MultiResolverOptionWithResolver(ethResolve, "eth"),
+ MultiResolverOptionWithResolver(testResolve, "test"),
+ ),
+ addr: testAddr,
+ result: testHash,
+ },
+ }
+ for _, x := range tests {
+ t.Run(x.desc, func(t *testing.T) {
+ res, err := x.r.Resolve(x.addr)
+ if err == nil {
+ if x.err != nil {
+ t.Fatalf("expected error %q, got result %q", x.err, res.Hex())
+ }
+ if res.Hex() != x.result {
+ t.Fatalf("expected result %q, got %q", x.result, res.Hex())
+ }
+ } else {
+ if x.err == nil {
+ t.Fatalf("expected no error, got %q", err)
+ }
+ if err.Error() != x.err.Error() {
+ t.Fatalf("expected error %q, got %q", x.err, err)
+ }
+ }
+ })
+ }
+}
diff --git a/swarm/swarm.go b/swarm/swarm.go
index 9db15325aee701a9179a4dfc2a676c05f482d386..9b6abc5b96a083f39796b161e7c7f9f017fea9f3 100644
--- a/swarm/swarm.go
+++ b/swarm/swarm.go
@@ -21,7 +21,9 @@ import (
"context"
"crypto/ecdsa"
"fmt"
+ "math/big"
"net"
+ "time"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
@@ -33,6 +35,7 @@ import (
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
+ "github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum/go-ethereum/swarm/api"
httpapi "github.com/ethereum/go-ethereum/swarm/api/http"
@@ -76,7 +79,7 @@ func (self *Swarm) API() *SwarmAPI {
// creates a new swarm service instance
// implements node.Service
-func NewSwarm(ctx *node.ServiceContext, backend chequebook.Backend, ensClient *ethclient.Client, config *api.Config, swapEnabled, syncEnabled bool, cors string) (self *Swarm, err error) {
+func NewSwarm(ctx *node.ServiceContext, backend chequebook.Backend, ensClientConfigs []ENSClientConfig, config *api.Config, swapEnabled, syncEnabled bool, cors string) (self *Swarm, err error) {
if bytes.Equal(common.FromHex(config.PublicKey), storage.ZeroKey) {
return nil, fmt.Errorf("empty public key")
}
@@ -133,18 +136,22 @@ func NewSwarm(ctx *node.ServiceContext, backend chequebook.Backend, ensClient *e
self.dpa = storage.NewDPA(dpaChunkStore, self.config.ChunkerParams)
log.Debug(fmt.Sprintf("-> Content Store API"))
- // set up high level api
- transactOpts := bind.NewKeyedTransactor(self.privateKey)
-
- if ensClient == nil {
- log.Warn("No ENS, please specify non-empty --ens-api to use domain name resolution")
- } else {
- self.dns, err = ens.NewENS(transactOpts, config.EnsRoot, ensClient)
+ if len(ensClientConfigs) == 1 {
+ self.dns, err = newEnsClient(ensClientConfigs[0].Endpoint, ensClientConfigs[0].ContractAddress, config)
if err != nil {
return nil, err
}
+ } else if len(ensClientConfigs) > 1 {
+ opts := []api.MultiResolverOption{}
+ for _, c := range ensClientConfigs {
+ r, err := newEnsClient(c.Endpoint, c.ContractAddress, config)
+ if err != nil {
+ return nil, err
+ }
+ opts = append(opts, api.MultiResolverOptionWithResolver(r, c.TLD))
+ }
+ self.dns = api.NewMultiResolver(opts...)
}
- log.Debug(fmt.Sprintf("-> Swarm Domain Name Registrar @ address %v", config.EnsRoot.Hex()))
self.api = api.NewApi(self.dpa, self.dns)
// Manifests for Smart Hosting
@@ -156,6 +163,78 @@ func NewSwarm(ctx *node.ServiceContext, backend chequebook.Backend, ensClient *e
return self, nil
}
+// ENSClientConfig holds information to construct ENS resolver. If TLD is non-empty,
+// the resolver will be used only for that TLD. If ContractAddress is empty,
+// it will be discovered by the client, or used one from the configuration.
+type ENSClientConfig struct {
+ Endpoint string
+ ContractAddress string
+ TLD string
+}
+
+// newEnsClient creates a new ENS client for that is a consumer of
+// a ENS API on a specific endpoint. It is used as a helper function
+// for creating multiple resolvers in NewSwarm function.
+func newEnsClient(endpoint, addr string, config *api.Config) (*ens.ENS, error) {
+ log.Info("connecting to ENS API", "url", endpoint)
+ client, err := rpc.Dial(endpoint)
+ if err != nil {
+ return nil, fmt.Errorf("error connecting to ENS API %s: %s", endpoint, err)
+ }
+ ensClient := ethclient.NewClient(client)
+
+ ensRoot := config.EnsRoot
+ if addr != "" {
+ ensRoot = common.HexToAddress(addr)
+ } else {
+ a, err := detectEnsAddr(client)
+ if err == nil {
+ ensRoot = a
+ } else {
+ log.Warn(fmt.Sprintf("could not determine ENS contract address, using default %s", ensRoot), "err", err)
+ }
+ }
+ transactOpts := bind.NewKeyedTransactor(config.Swap.PrivateKey())
+ dns, err := ens.NewENS(transactOpts, ensRoot, ensClient)
+ if err != nil {
+ return nil, err
+ }
+ log.Debug(fmt.Sprintf("-> Swarm Domain Name Registrar %v @ address %v", endpoint, ensRoot.Hex()))
+ return dns, err
+}
+
+// detectEnsAddr determines the ENS contract address by getting both the
+// version and genesis hash using the client and matching them to either
+// mainnet or testnet addresses
+func detectEnsAddr(client *rpc.Client) (common.Address, error) {
+ ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+ defer cancel()
+
+ var version string
+ if err := client.CallContext(ctx, &version, "net_version"); err != nil {
+ return common.Address{}, err
+ }
+
+ block, err := ethclient.NewClient(client).BlockByNumber(ctx, big.NewInt(0))
+ if err != nil {
+ return common.Address{}, err
+ }
+
+ switch {
+
+ case version == "1" && block.Hash() == params.MainnetGenesisHash:
+ log.Info("using Mainnet ENS contract address", "addr", ens.MainNetAddress)
+ return ens.MainNetAddress, nil
+
+ case version == "3" && block.Hash() == params.TestnetGenesisHash:
+ log.Info("using Testnet ENS contract address", "addr", ens.TestNetAddress)
+ return ens.TestNetAddress, nil
+
+ default:
+ return common.Address{}, fmt.Errorf("unknown version and genesis hash: %s %s", version, block.Hash())
+ }
+}
+
/*
Start is called when the stack is started
* starts the network kademlia hive peer management