Merge branch 'master' of github.com:simple-rules/harmony-benchmark

identitychain/identityblock.go

@@ -1,9 +1,70 @@
 package identitychain
 
-import "github.com/simple-rules/harmony-benchmark/p2p"
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/gob"
+	"log"
+	"time"
+
+	"github.com/simple-rules/harmony-benchmark/utils"
+	"github.com/simple-rules/harmony-benchmark/waitnode"
+)
 
 // IdentityBlock has the information of one node
 type IdentityBlock struct {
-	Peer          p2p.Peer
+	Timestamp     int64
+	PrevBlockHash [32]byte
 	NumIdentities int32
+	Identities    []*waitnode.WaitNode
+}
+
+// Serialize serializes the block
+func (b *IdentityBlock) Serialize() []byte {
+	var result bytes.Buffer
+	encoder := gob.NewEncoder(&result)
+	err := encoder.Encode(b)
+	if err != nil {
+		log.Panic(err)
+	}
+	return result.Bytes()
+}
+
+// DeserializeBlock deserializes a block
+func DeserializeBlock(d []byte) *IdentityBlock {
+	var block IdentityBlock
+	decoder := gob.NewDecoder(bytes.NewReader(d))
+	err := decoder.Decode(&block)
+	if err != nil {
+		log.Panic(err)
+	}
+	return &block
+}
+
+// NewBlock creates and returns a new block.
+func NewBlock(Identities []*waitnode.WaitNode, prevBlockHash [32]byte) *IdentityBlock {
+	block := &IdentityBlock{Timestamp: time.Now().Unix(), PrevBlockHash: prevBlockHash, NumIdentities: int32(len(Identities)), Identities: Identities}
+	return &block
+}
+
+// CalculateBlockHash returns a hash of the block
+func (b *IdentityBlock) CalculateBlockHash() []byte {
+	var hashes [][]byte
+	var blockHash [32]byte
+	hashes = append(hashes, utils.ConvertFixedDataIntoByteArray(b.Timestamp))
+	hashes = append(hashes, b.PrevBlockHash[:])
+	for _, id := range b.Identities {
+		hashes = append(hashes, id)
+	}
+	hashes = append(hashes, utils.ConvertFixedDataIntoByteArray(b.ShardId))
+	blockHash = sha256.Sum256(bytes.Join(hashes, []byte{}))
+	return blockHash[:]
+}
+
+// NewGenesisBlock creates and returns genesis Block.
+func NewGenesisBlock() *IdentityBlock {
+	numTxs := 0
+	var Ids []*waitnode.WaitNode
+	block := &IdentityBlock{Timestamp: time.Now().Unix(), PrevBlockHash: [32]byte{}, NumIdentities: 1, Identities: Ids}
+	return block
 }

identitychain/identitychain.go

@@ -1,7 +1,6 @@
 package identitychain
 
 import (
-	"fmt"
 	"net"
 	"os"
 	"sync"
@@ -12,7 +11,7 @@ import (
 )
 
 var mutex sync.Mutex
-
+var IdentityPerBlock := 100000
 // IdentityChain (Blockchain) keeps Identities per epoch, currently centralized!
 type IdentityChain struct {
 	Identities        []*IdentityBlock
@@ -20,10 +19,67 @@ type IdentityChain struct {
 	log               log.Logger
 }
 
-//IdentityChainHandler handles transactions
+//IdentityChainHandler handles registration of new Identities
 func (IDC *IdentityChain) IdentityChainHandler(conn net.Conn) {
-	fmt.Println("yay")
+	// Read p2p message payload
+	content, err := p2p.ReadMessageContent(conn)
+	if err != nil {
+		IDC.log.Error("Read p2p data failed", "err", err, "node", node)
+		return
+	}
+	
+	msgCategory, err := proto.GetMessageCategory(content)
+	if err != nil {
+		IDC.log.Error("Read node type failed", "err", err, "node", node)
+		return
+	}
+
+	msgType, err := proto.GetMessageType(content)
+	if err != nil {
+		IDC.log.Error("Read action type failed", "err", err, "node", node)
+		return
+	}
+
+	msgPayload, err := proto.GetMessagePayload(content)
+	if err != nil {
+		IDC.log.Error("Read message payload failed", "err", err, "node", node)
+		return
+	}
+	content, err := p2p.ReadMessageContent(conn)
+	if err != nil {
+		IDC.log.Error("Read p2p data failed", "err", err, "node", node)
+		return
 	}
+}
+
+// GetLatestBlock gests the latest block at the end of the chain
+func (IDC *IdentityChain) GetLatestBlock() *IdentityBlock {
+	if len(IDC.Identities) == 0 {
+		return nil
+	}
+	return IDC.Identities[len(IDC.Identities)-1]
+}
+
+//CreateNewBlock is to create the Blocks to be added to the chain
+func (IDC *IdentityChain) MakeNewBlock() *IdentityBlock {
+	
+	if len(IDC.Identities) == 0 {
+		return NewGenesisBlock()
+	}
+	//If there are no more Identities registring the blockchain is dead
+	if len(IDC.PendingIdentities) == 0 {
+		// This is abd, because previous block might not be alive
+		return IDC.GetLatestBlock()
+	}
+	prevBlock := IDC.GetLatestBlock()
+	NewIdentities  := IDC.PendingIdentities[:IdentityPerBlock]
+	IDC.PendingIdentities = IDC.PendingIdentities[IdentityPerBlock]:
+	//All other blocks are dropped.
+	IDBlock = NewBlock(NewIdentities,prevBlock.CalculateBlockHash())
+	IDC.Identities = append(IDBlock,IDC.Identities)
+	}
+}
+
 func (IDC *IdentityChain) listenOnPort(port string) {
 	listen, err := net.Listen("tcp4", ":"+port)
 	defer listen.Close()
@@ -49,6 +105,5 @@ func main() {
 		mutex.Lock()
 		IDC.Identities = append(IDC.Identities, genesisBlock)
 		mutex.Unlock()
-
 	}()
 }

proto/common.go

@@ -24,10 +24,12 @@ n - 2 bytes       - actual message payload
 // The message category enum
 type MessageCategory byte
 
+//CONSENSUS and other message categories
 const (
 	CONSENSUS MessageCategory = iota
 	NODE
 	CLIENT
+	IDENTITY
 	// TODO: add more types
 )
 

proto/identity/identity.go

@@ -0,0 +1,42 @@
+package identity
+
+import (
+	"errors"
+)
+
+// the number of bytes consensus message type occupies
+const IDENTITY_MESSAGE_TYPE_BYTES = 1
+
+type MessageType int
+
+const (
+	REGISTER MessageType = iota
+)
+
+// Returns string name for the MessageType enum
+func (msgType MessageType) String() string {
+	names := [...]string{
+		"REGISTER",
+	}
+
+	if msgType < REGISTER || msgType > REGISTER {
+		return "Unknown"
+	}
+	return names[msgType]
+}
+
+// GetIdentityMessageType Get the consensus message type from the identity message
+func GetIdentityMessageType(message []byte) (MessageType, error) {
+	if len(message) < 1 {
+		return 0, errors.New("Failed to get consensus message type: no data available.")
+	}
+	return MessageType(message[0]), nil
+}
+
+// GetIdentityMessagePayload message payload from the identity message
+func GetIdentityMessagePayload(message []byte) ([]byte, error) {
+	if len(message) < 2 {
+		return []byte{}, errors.New("Failed to get consensus message payload: no data available.")
+	}
+	return message[IDENTITY_MESSAGE_TYPE_BYTES:], nil
+}