dex: use dex/downloader in dex

To compatible with ethereum code base, make Downloader a
interface in internal/ethapi

14 files changed, 46 insertions, 42 deletions

diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 611db1975..21913e22a 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -40,8 +40,8 @@ import (
 	"github.com/dexon-foundation/dexon/crypto"
 	"github.com/dexon-foundation/dexon/dashboard"
 	"github.com/dexon-foundation/dexon/dex"
+	"github.com/dexon-foundation/dexon/dex/downloader"
 	"github.com/dexon-foundation/dexon/eth"
-	"github.com/dexon-foundation/dexon/eth/downloader"
 	"github.com/dexon-foundation/dexon/eth/gasprice"
 	"github.com/dexon-foundation/dexon/ethdb"
 	"github.com/dexon-foundation/dexon/ethstats"
diff --git a/dex/api_backend.go b/dex/api_backend.go
index 14969fd2a..0c8dfdb8a 100644
--- a/dex/api_backend.go
+++ b/dex/api_backend.go
@@ -29,8 +29,8 @@ import (
 	"github.com/dexon-foundation/dexon/core/state"
 	"github.com/dexon-foundation/dexon/core/types"
 	"github.com/dexon-foundation/dexon/core/vm"
-	"github.com/dexon-foundation/dexon/eth/downloader"
 	"github.com/dexon-foundation/dexon/eth/gasprice"
+	"github.com/dexon-foundation/dexon/internal/ethapi"
 
 	"github.com/dexon-foundation/dexon/ethdb"
 	"github.com/dexon-foundation/dexon/event"
@@ -186,7 +186,7 @@ func (b *DexAPIBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.S
 	return b.dex.TxPool().SubscribeNewTxsEvent(ch)
 }
 
-func (b *DexAPIBackend) Downloader() *downloader.Downloader {
+func (b *DexAPIBackend) Downloader() ethapi.Downloader {
 	return b.dex.Downloader()
 }
 
diff --git a/dex/backend.go b/dex/backend.go
index 36b28345c..8fe9e9ea3 100644
--- a/dex/backend.go
+++ b/dex/backend.go
@@ -33,7 +33,7 @@ import (
 	"github.com/dexon-foundation/dexon/core/rawdb"
 	"github.com/dexon-foundation/dexon/core/vm"
 	"github.com/dexon-foundation/dexon/dex/blockdb"
-	"github.com/dexon-foundation/dexon/eth/downloader"
+	"github.com/dexon-foundation/dexon/dex/downloader"
 	"github.com/dexon-foundation/dexon/eth/filters"
 	"github.com/dexon-foundation/dexon/eth/gasprice"
 	"github.com/dexon-foundation/dexon/ethdb"
@@ -266,12 +266,12 @@ func CreateDB(ctx *node.ServiceContext, config *Config, name string) (ethdb.Data
 	return db, nil
 }
 
-func (d *Dexon) AccountManager() *accounts.Manager  { return d.accountManager }
-func (d *Dexon) BlockChain() *core.BlockChain       { return d.blockchain }
-func (d *Dexon) TxPool() *core.TxPool               { return d.txPool }
-func (d *Dexon) DexVersion() int                    { return int(d.protocolManager.SubProtocols[0].Version) }
-func (d *Dexon) EventMux() *event.TypeMux           { return d.eventMux }
-func (d *Dexon) Engine() consensus.Engine           { return d.engine }
-func (d *Dexon) ChainDb() ethdb.Database            { return d.chainDb }
-func (d *Dexon) Downloader() *downloader.Downloader { return d.protocolManager.downloader }
-func (d *Dexon) NetVersion() uint64                 { return d.networkID }
+func (d *Dexon) AccountManager() *accounts.Manager { return d.accountManager }
+func (d *Dexon) BlockChain() *core.BlockChain      { return d.blockchain }
+func (d *Dexon) TxPool() *core.TxPool              { return d.txPool }
+func (d *Dexon) DexVersion() int                   { return int(d.protocolManager.SubProtocols[0].Version) }
+func (d *Dexon) EventMux() *event.TypeMux          { return d.eventMux }
+func (d *Dexon) Engine() consensus.Engine          { return d.engine }
+func (d *Dexon) ChainDb() ethdb.Database           { return d.chainDb }
+func (d *Dexon) Downloader() ethapi.Downloader     { return d.protocolManager.downloader }
+func (d *Dexon) NetVersion() uint64                { return d.networkID }
diff --git a/dex/config.go b/dex/config.go
index 438e959e3..4505ff59c 100644
--- a/dex/config.go
+++ b/dex/config.go
@@ -26,7 +26,7 @@ import (
 	"time"
 
 	"github.com/dexon-foundation/dexon/core"
-	"github.com/dexon-foundation/dexon/eth/downloader"
+	"github.com/dexon-foundation/dexon/dex/downloader"
 	"github.com/dexon-foundation/dexon/eth/gasprice"
 	"github.com/dexon-foundation/dexon/params"
 )
diff --git a/dex/handler.go b/dex/handler.go
index a1a158560..d66403fe6 100644
--- a/dex/handler.go
+++ b/dex/handler.go
@@ -54,8 +54,8 @@ import (
 	"github.com/dexon-foundation/dexon/core"
 	"github.com/dexon-foundation/dexon/core/types"
 	"github.com/dexon-foundation/dexon/crypto"
-	"github.com/dexon-foundation/dexon/eth/downloader"
-	"github.com/dexon-foundation/dexon/eth/fetcher"
+	"github.com/dexon-foundation/dexon/dex/downloader"
+	"github.com/dexon-foundation/dexon/dex/fetcher"
 	"github.com/dexon-foundation/dexon/ethdb"
 	"github.com/dexon-foundation/dexon/event"
 	"github.com/dexon-foundation/dexon/log"
diff --git a/dex/handler_test.go b/dex/handler_test.go
index 981362bb5..dc1ea1d73 100644
--- a/dex/handler_test.go
+++ b/dex/handler_test.go
@@ -27,7 +27,7 @@ import (
 	"github.com/dexon-foundation/dexon/core/state"
 	"github.com/dexon-foundation/dexon/core/types"
 	"github.com/dexon-foundation/dexon/crypto"
-	"github.com/dexon-foundation/dexon/eth/downloader"
+	"github.com/dexon-foundation/dexon/dex/downloader"
 	"github.com/dexon-foundation/dexon/ethdb"
 	"github.com/dexon-foundation/dexon/p2p"
 	"github.com/dexon-foundation/dexon/params"
diff --git a/dex/helper_test.go b/dex/helper_test.go
index 9a135d3e3..f57f3eff4 100644
--- a/dex/helper_test.go
+++ b/dex/helper_test.go
@@ -33,7 +33,7 @@ import (
 	"github.com/dexon-foundation/dexon/core/types"
 	"github.com/dexon-foundation/dexon/core/vm"
 	"github.com/dexon-foundation/dexon/crypto"
-	"github.com/dexon-foundation/dexon/eth/downloader"
+	"github.com/dexon-foundation/dexon/dex/downloader"
 	"github.com/dexon-foundation/dexon/ethdb"
 	"github.com/dexon-foundation/dexon/event"
 	"github.com/dexon-foundation/dexon/p2p"
diff --git a/dex/protocol_test.go b/dex/protocol_test.go
index b0e89230a..64d7fa3e7 100644
--- a/dex/protocol_test.go
+++ b/dex/protocol_test.go
@@ -34,7 +34,7 @@ import (
 	"github.com/dexon-foundation/dexon/common"
 	"github.com/dexon-foundation/dexon/core/types"
 	"github.com/dexon-foundation/dexon/crypto"
-	"github.com/dexon-foundation/dexon/eth/downloader"
+	"github.com/dexon-foundation/dexon/dex/downloader"
 	"github.com/dexon-foundation/dexon/p2p"
 	"github.com/dexon-foundation/dexon/rlp"
 )
diff --git a/dex/sync.go b/dex/sync.go
index 5af6076bc..b6a8035d4 100644
--- a/dex/sync.go
+++ b/dex/sync.go
@@ -23,7 +23,7 @@ import (
 
 	"github.com/dexon-foundation/dexon/common"
 	"github.com/dexon-foundation/dexon/core/types"
-	"github.com/dexon-foundation/dexon/eth/downloader"
+	"github.com/dexon-foundation/dexon/dex/downloader"
 	"github.com/dexon-foundation/dexon/log"
 	"github.com/dexon-foundation/dexon/p2p/enode"
 )
diff --git a/eth/api_backend.go b/eth/api_backend.go
index 358e3512e..b8a525f02 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -28,10 +28,10 @@ import (
 	"github.com/dexon-foundation/dexon/core/state"
 	"github.com/dexon-foundation/dexon/core/types"
 	"github.com/dexon-foundation/dexon/core/vm"
-	"github.com/dexon-foundation/dexon/eth/downloader"
 	"github.com/dexon-foundation/dexon/eth/gasprice"
 	"github.com/dexon-foundation/dexon/ethdb"
 	"github.com/dexon-foundation/dexon/event"
+	"github.com/dexon-foundation/dexon/internal/ethapi"
 	"github.com/dexon-foundation/dexon/params"
 	"github.com/dexon-foundation/dexon/rpc"
 )
@@ -189,7 +189,7 @@ func (b *EthAPIBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.S
 	return b.eth.TxPool().SubscribeNewTxsEvent(ch)
 }
 
-func (b *EthAPIBackend) Downloader() *downloader.Downloader {
+func (b *EthAPIBackend) Downloader() ethapi.Downloader {
 	return b.eth.Downloader()
 }
 
diff --git a/eth/backend.go b/eth/backend.go
index a6a558823..90cfa1a9a 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -462,16 +462,16 @@ func (s *Ethereum) StopMining() {
 func (s *Ethereum) IsMining() bool      { return s.miner.Mining() }
 func (s *Ethereum) Miner() *miner.Miner { return s.miner }
 
-func (s *Ethereum) AccountManager() *accounts.Manager  { return s.accountManager }
-func (s *Ethereum) BlockChain() *core.BlockChain       { return s.blockchain }
-func (s *Ethereum) TxPool() *core.TxPool               { return s.txPool }
-func (s *Ethereum) EventMux() *event.TypeMux           { return s.eventMux }
-func (s *Ethereum) Engine() consensus.Engine           { return s.engine }
-func (s *Ethereum) ChainDb() ethdb.Database            { return s.chainDb }
-func (s *Ethereum) IsListening() bool                  { return true } // Always listening
-func (s *Ethereum) EthVersion() int                    { return int(s.protocolManager.SubProtocols[0].Version) }
-func (s *Ethereum) NetVersion() uint64                 { return s.networkID }
-func (s *Ethereum) Downloader() *downloader.Downloader { return s.protocolManager.downloader }
+func (s *Ethereum) AccountManager() *accounts.Manager { return s.accountManager }
+func (s *Ethereum) BlockChain() *core.BlockChain      { return s.blockchain }
+func (s *Ethereum) TxPool() *core.TxPool              { return s.txPool }
+func (s *Ethereum) EventMux() *event.TypeMux          { return s.eventMux }
+func (s *Ethereum) Engine() consensus.Engine          { return s.engine }
+func (s *Ethereum) ChainDb() ethdb.Database           { return s.chainDb }
+func (s *Ethereum) IsListening() bool                 { return true } // Always listening
+func (s *Ethereum) EthVersion() int                   { return int(s.protocolManager.SubProtocols[0].Version) }
+func (s *Ethereum) NetVersion() uint64                { return s.networkID }
+func (s *Ethereum) Downloader() ethapi.Downloader     { return s.protocolManager.downloader }
 
 // Protocols implements node.Service, returning all the currently configured
 // network protocols to start.
diff --git a/internal/ethapi/backend.go b/internal/ethapi/backend.go
index 945db74e3..85383a71f 100644
--- a/internal/ethapi/backend.go
+++ b/internal/ethapi/backend.go
@@ -21,24 +21,28 @@ import (
 	"context"
 	"math/big"
 
+	ethereum "github.com/dexon-foundation/dexon"
 	"github.com/dexon-foundation/dexon/accounts"
 	"github.com/dexon-foundation/dexon/common"
 	"github.com/dexon-foundation/dexon/core"
 	"github.com/dexon-foundation/dexon/core/state"
 	"github.com/dexon-foundation/dexon/core/types"
 	"github.com/dexon-foundation/dexon/core/vm"
-	"github.com/dexon-foundation/dexon/eth/downloader"
 	"github.com/dexon-foundation/dexon/ethdb"
 	"github.com/dexon-foundation/dexon/event"
 	"github.com/dexon-foundation/dexon/params"
 	"github.com/dexon-foundation/dexon/rpc"
 )
 
+type Downloader interface {
+	Progress() ethereum.SyncProgress
+}
+
 // Backend interface provides the common API services (that are provided by
 // both full and light clients) with access to necessary functions.
 type Backend interface {
 	// General Ethereum API
-	Downloader() *downloader.Downloader
+	Downloader() Downloader
 	ProtocolVersion() int
 	SuggestPrice(ctx context.Context) (*big.Int, error)
 	ChainDb() ethdb.Database
diff --git a/les/api_backend.go b/les/api_backend.go
index 49cb91be2..ab63be7d8 100644
--- a/les/api_backend.go
+++ b/les/api_backend.go
@@ -29,10 +29,10 @@ import (
 	"github.com/dexon-foundation/dexon/core/state"
 	"github.com/dexon-foundation/dexon/core/types"
 	"github.com/dexon-foundation/dexon/core/vm"
-	"github.com/dexon-foundation/dexon/eth/downloader"
 	"github.com/dexon-foundation/dexon/eth/gasprice"
 	"github.com/dexon-foundation/dexon/ethdb"
 	"github.com/dexon-foundation/dexon/event"
+	"github.com/dexon-foundation/dexon/internal/ethapi"
 	"github.com/dexon-foundation/dexon/light"
 	"github.com/dexon-foundation/dexon/params"
 	"github.com/dexon-foundation/dexon/rpc"
@@ -163,7 +163,7 @@ func (b *LesApiBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEven
 	return b.eth.blockchain.SubscribeRemovedLogsEvent(ch)
 }
 
-func (b *LesApiBackend) Downloader() *downloader.Downloader {
+func (b *LesApiBackend) Downloader() ethapi.Downloader {
 	return b.eth.Downloader()
 }
 
diff --git a/les/backend.go b/les/backend.go
index 651f26ba6..b56222bba 100644
--- a/les/backend.go
+++ b/les/backend.go
@@ -215,12 +215,12 @@ func (s *LightEthereum) ResetWithGenesisBlock(gb *types.Block) {
 	s.blockchain.ResetWithGenesisBlock(gb)
 }
 
-func (s *LightEthereum) BlockChain() *light.LightChain      { return s.blockchain }
-func (s *LightEthereum) TxPool() *light.TxPool              { return s.txPool }
-func (s *LightEthereum) Engine() consensus.Engine           { return s.engine }
-func (s *LightEthereum) LesVersion() int                    { return int(ClientProtocolVersions[0]) }
-func (s *LightEthereum) Downloader() *downloader.Downloader { return s.protocolManager.downloader }
-func (s *LightEthereum) EventMux() *event.TypeMux           { return s.eventMux }
+func (s *LightEthereum) BlockChain() *light.LightChain { return s.blockchain }
+func (s *LightEthereum) TxPool() *light.TxPool         { return s.txPool }
+func (s *LightEthereum) Engine() consensus.Engine      { return s.engine }
+func (s *LightEthereum) LesVersion() int               { return int(ClientProtocolVersions[0]) }
+func (s *LightEthereum) Downloader() ethapi.Downloader { return s.protocolManager.downloader }
+func (s *LightEthereum) EventMux() *event.TypeMux      { return s.eventMux }
 
 // Protocols implements node.Service, returning all the currently configured
 // network protocols to start.