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121 lines
4.2 KiB
121 lines
4.2 KiB
package downloader
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import (
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"context"
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"fmt"
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"time"
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pb "github.com/harmony-one/harmony/api/service/syncing/downloader/proto"
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"github.com/harmony-one/harmony/internal/utils"
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"google.golang.org/grpc"
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)
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// Client is the client model for downloader package.
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type Client struct {
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dlClient pb.DownloaderClient
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opts []grpc.DialOption
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conn *grpc.ClientConn
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}
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// ClientSetup setups a Client given ip and port.
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func ClientSetup(ip, port string) *Client {
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client := Client{}
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client.opts = append(client.opts, grpc.WithInsecure())
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var err error
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client.conn, err = grpc.Dial(fmt.Sprintf(ip+":"+port), client.opts...)
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if err != nil {
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utils.GetLogInstance().Info("client.go:ClientSetup fail to dial: ", "error", err)
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return nil
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}
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utils.GetLogInstance().Info("[SYNC] grpc connect successfully", "ip", ip, "port", port)
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client.dlClient = pb.NewDownloaderClient(client.conn)
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return &client
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}
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// Close closes the Client.
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func (client *Client) Close() {
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err := client.conn.Close()
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if err != nil {
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utils.GetLogInstance().Info("unable to close connection ")
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}
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}
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// GetBlockHashes gets block hashes from all the peers by calling grpc request.
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func (client *Client) GetBlockHashes(startHash []byte, size uint32) *pb.DownloaderResponse {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_HEADER, BlockHash: startHash, Size: size}
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response, err := client.dlClient.Query(ctx, request)
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if err != nil {
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utils.GetLogInstance().Info("[SYNC] GetBlockHashes query failed", "error", err)
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}
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return response
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}
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// GetBlocks gets blocks in serialization byte array by calling a grpc request.
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func (client *Client) GetBlocks(hashes [][]byte) *pb.DownloaderResponse {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_BLOCK}
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request.Hashes = make([][]byte, len(hashes))
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for i := range hashes {
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request.Hashes[i] = make([]byte, len(hashes[i]))
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copy(request.Hashes[i], hashes[i])
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}
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response, err := client.dlClient.Query(ctx, request)
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if err != nil {
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utils.GetLogInstance().Info("[SYNC] downloader/client.go:GetBlocks query failed.", "error", err)
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}
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return response
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}
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// Register will register node's ip/port information to peers receive newly created blocks in future
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// hash is the bytes of "ip:port" string representation
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func (client *Client) Register(hash []byte, ip, port string) *pb.DownloaderResponse {
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ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
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defer cancel()
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request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_REGISTER}
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request.PeerHash = make([]byte, len(hash))
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copy(request.PeerHash, hash)
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request.Ip = ip
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request.Port = port
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response, err := client.dlClient.Query(ctx, request)
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if err != nil || response == nil {
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utils.GetLogInstance().Info("[SYNC] client.go:Register failed.", "error", err, "response", response)
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}
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return response
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}
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// PushNewBlock will send the lastest verified block to registered nodes
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func (client *Client) PushNewBlock(selfPeerHash [20]byte, blockHash []byte, timeout bool) *pb.DownloaderResponse {
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_NEWBLOCK}
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request.BlockHash = make([]byte, len(blockHash))
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copy(request.BlockHash, blockHash)
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request.PeerHash = make([]byte, len(selfPeerHash))
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copy(request.PeerHash, selfPeerHash[:])
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if timeout {
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request.Type = pb.DownloaderRequest_REGISTERTIMEOUT
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}
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response, err := client.dlClient.Query(ctx, request)
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if err != nil {
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utils.GetLogInstance().Info("[SYNC] unable to send new block to unsync node", "error", err)
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}
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return response
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}
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// GetBlockChainHeight gets the blockheight from peer
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func (client *Client) GetBlockChainHeight() *pb.DownloaderResponse {
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_BLOCKHEIGHT}
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response, err := client.dlClient.Query(ctx, request)
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if err != nil {
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utils.GetLogInstance().Info("[SYNC] unable to get blockchain height", "error", err)
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}
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return response
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}
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