The core protocol of WoopChain
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woop/api/service/syncing/downloader/client.go

122 lines
4.1 KiB

package downloader
import (
"context"
"fmt"
"time"
pb "github.com/harmony-one/harmony/api/service/syncing/downloader/proto"
"github.com/harmony-one/harmony/internal/utils"
"google.golang.org/grpc"
)
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// Client is the client model for downloader package.
type Client struct {
dlClient pb.DownloaderClient
opts []grpc.DialOption
conn *grpc.ClientConn
}
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// ClientSetup setups a Client given ip and port.
func ClientSetup(ip, port string) *Client {
client := Client{}
client.opts = append(client.opts, grpc.WithInsecure())
var err error
client.conn, err = grpc.Dial(fmt.Sprintf(ip+":"+port), client.opts...)
if err != nil {
utils.GetLogInstance().Info("client.go:ClientSetup fail to dial: ", "error", err)
return nil
}
client.dlClient = pb.NewDownloaderClient(client.conn)
return &client
}
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// Close closes the Client.
func (client *Client) Close() {
err := client.conn.Close()
if err != nil {
utils.GetLogInstance().Info("unable to close connection ")
}
}
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// GetBlockHashes gets block hashes from all the peers by calling grpc request.
func (client *Client) GetBlockHashes(startHash []byte) *pb.DownloaderResponse {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_HEADER, BlockHash: startHash}
response, err := client.dlClient.Query(ctx, request)
if err != nil {
utils.GetLogInstance().Info("[SYNC] GetBlockHashes query failed", "error", err)
}
return response
}
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// GetBlocks gets blocks in serialization byte array by calling a grpc request.
func (client *Client) GetBlocks(hashes [][]byte) *pb.DownloaderResponse {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_BLOCK}
request.Hashes = make([][]byte, len(hashes))
for i := range hashes {
request.Hashes[i] = make([]byte, len(hashes[i]))
copy(request.Hashes[i], hashes[i])
}
response, err := client.dlClient.Query(ctx, request)
if err != nil {
utils.GetLogInstance().Info("[SYNC] downloader/client.go:GetBlocks query failed.", "error", err)
}
return response
}
// Register will register node's ip/port information to peers receive newly created blocks in future
// hash is the bytes of "ip:port" string representation
func (client *Client) Register(hash []byte, ip, port string) *pb.DownloaderResponse {
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
defer cancel()
request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_REGISTER}
request.PeerHash = make([]byte, len(hash))
copy(request.PeerHash, hash)
request.Ip = ip
request.Port = port
response, err := client.dlClient.Query(ctx, request)
if err != nil || response == nil {
utils.GetLogInstance().Info("[SYNC] client.go:Register failed.", "error", err, "response", response)
}
return response
}
// PushNewBlock will send the lastest verified block to registered nodes
func (client *Client) PushNewBlock(selfPeerHash [20]byte, blockHash []byte, timeout bool) *pb.DownloaderResponse {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_NEWBLOCK}
request.BlockHash = make([]byte, len(blockHash))
copy(request.BlockHash, blockHash)
request.PeerHash = make([]byte, len(selfPeerHash))
copy(request.PeerHash, selfPeerHash[:])
if timeout {
request.Type = pb.DownloaderRequest_REGISTERTIMEOUT
}
response, err := client.dlClient.Query(ctx, request)
if err != nil {
utils.GetLogInstance().Info("[SYNC] unable to send new block to unsync node", "error", err)
}
return response
}
// GetBlockChainHeight gets the blockheight from peer
func (client *Client) GetBlockChainHeight() *pb.DownloaderResponse {
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_BLOCKHEIGHT}
response, err := client.dlClient.Query(ctx, request)
if err != nil {
utils.GetLogInstance().Info("[SYNC] unable to get blockchain height", "error", err)
}
return response
}