ipld-eth-server/pkg/geth/geth_blockchain.go

63 lines
1.8 KiB
Go
Raw Normal View History

package geth
2017-10-23 18:58:33 +00:00
import (
"fmt"
"math/big"
2017-11-06 18:53:43 +00:00
"github.com/8thlight/vulcanizedb/pkg/core"
"github.com/8thlight/vulcanizedb/pkg/geth/node"
"github.com/ethereum/go-ethereum"
2017-10-23 18:58:33 +00:00
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethclient"
"github.com/ethereum/go-ethereum/rpc"
2017-10-23 18:58:33 +00:00
"golang.org/x/net/context"
)
2017-10-23 18:58:33 +00:00
type GethBlockchain struct {
client *ethclient.Client
readGethHeaders chan *types.Header
outputBlocks chan core.Block
newHeadSubscription ethereum.Subscription
node core.Node
}
func (blockchain *GethBlockchain) Node() core.Node {
return blockchain.node
2017-10-23 18:58:33 +00:00
}
func (blockchain *GethBlockchain) GetBlockByNumber(blockNumber int64) core.Block {
gethBlock, _ := blockchain.client.BlockByNumber(context.Background(), big.NewInt(blockNumber))
2017-11-08 20:55:35 +00:00
return GethBlockToCoreBlock(gethBlock, blockchain.client)
}
func NewGethBlockchain(ipcPath string) *GethBlockchain {
2017-10-23 18:58:33 +00:00
blockchain := GethBlockchain{}
rpcClient, _ := rpc.Dial(ipcPath)
client := ethclient.NewClient(rpcClient)
blockchain.node = node.Retrieve(rpcClient)
2017-10-23 18:58:33 +00:00
blockchain.client = client
return &blockchain
}
func (blockchain *GethBlockchain) SubscribeToBlocks(blocks chan core.Block) {
blockchain.outputBlocks = blocks
fmt.Println("SubscribeToBlocks")
inputHeaders := make(chan *types.Header, 10)
myContext := context.Background()
blockchain.readGethHeaders = inputHeaders
subscription, _ := blockchain.client.SubscribeNewHead(myContext, inputHeaders)
blockchain.newHeadSubscription = subscription
2017-10-23 18:58:33 +00:00
}
func (blockchain *GethBlockchain) StartListening() {
for header := range blockchain.readGethHeaders {
block := blockchain.GetBlockByNumber(header.Number.Int64())
blockchain.outputBlocks <- block
2017-10-23 18:58:33 +00:00
}
}
func (blockchain *GethBlockchain) StopListening() {
blockchain.newHeadSubscription.Unsubscribe()
}