57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
|
package node
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
|
||
|
|
"github.com/sirupsen/logrus"
|
||
|
|
|
||
|
|
"github.com/Secured-Finance/dione/node/wire"
|
||
|
|
|
||
|
|
"github.com/Secured-Finance/dione/blockchain/pool"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
MaxBlockCountForRetrieving = 500 // we do it just like in Bitcoin
|
||
|
|
)
|
||
|
|
|
||
|
|
type NetworkService struct {
|
||
|
|
blockpool *pool.BlockPool
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewNetworkService(bp *pool.BlockPool) *NetworkService {
|
||
|
|
return &NetworkService{
|
||
|
|
blockpool: bp,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *NetworkService) LastBlockHeight(ctx context.Context, arg interface{}, reply *wire.LastBlockHeightReply) {
|
||
|
|
height, err := s.blockpool.GetLatestBlockHeight()
|
||
|
|
if err != nil {
|
||
|
|
reply.Error = err
|
||
|
|
return
|
||
|
|
}
|
||
|
|
reply.Height = height
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *NetworkService) GetBlocks(ctx context.Context, arg wire.GetBlocksArg, reply *wire.GetBlocksReply) {
|
||
|
|
if arg.From > arg.To {
|
||
|
|
errText := "incorrect arguments: from > to"
|
||
|
|
reply.Error = &errText
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if arg.To-arg.From > MaxBlockCountForRetrieving {
|
||
|
|
errText := "incorrect arguments: count of block for retrieving is exceeded the limit"
|
||
|
|
reply.Error = &errText
|
||
|
|
return
|
||
|
|
}
|
||
|
|
for i := arg.From; i <= arg.To; i++ {
|
||
|
|
block, err := s.blockpool.FetchBlockByHeight(i)
|
||
|
|
if err != nil {
|
||
|
|
logrus.Warnf("failed to retrieve block from blockpool with height %d", i)
|
||
|
|
reply.FailedBlockHeights = append(reply.FailedBlockHeights, i)
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
reply.Blocks = append(reply.Blocks, *block)
|
||
|
|
}
|
||
|
|
}
|