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scanblocks.go
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scanblocks.go
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package main
import (
"encoding/json"
"flag"
"fmt"
"math/big"
"os"
"strconv"
"github.com/btcsuite/btclog"
apitypes "github.com/coolsnady/hcexplorer/dcrdataapi"
"github.com/coolsnady/hcexplorer/rpcutils"
"github.com/coolsnady/hcexplorer/txhelpers"
"github.com/coolsnady/hcd/blockchain"
"github.com/coolsnady/hcd/chaincfg"
"github.com/coolsnady/hcutil"
"github.com/coolsnady/hcrpcclient"
)
var host = flag.String("host", "127.0.0.1:9109", "node RPC host:port")
var user = flag.String("user", "hcd", "node RPC username")
var pass = flag.String("pass", "bananas", "node RPC password")
var cert = flag.String("cert", "hcd.cert", "node RPC TLS certificate (when notls=false)")
var notls = flag.Bool("notls", true, "Disable use of TLS for node connection")
var (
activeNetParams = &chaincfg.MainNetParams
backendLog *btclog.Backend
rpcclientLogger btclog.Logger
)
func mainCore() int {
//defer profile.Start(profile.CPUProfile).Stop()
defer func() {
logFILE.Close()
os.Stdout.Sync()
}()
flag.Parse()
client, _, err := rpcutils.ConnectNodeRPC(*host, *user, *pass, *cert, *notls)
if err != nil {
log.Fatalf("Unable to connect to RPC server: %v", err)
return 1
}
infoResult, err := client.GetInfo()
if err != nil {
log.Errorf("GetInfo failed: %v", err)
return 1
}
log.Info("Node connection count: ", infoResult.Connections)
_, height, err := client.GetBestBlock()
if err != nil {
log.Error("GetBestBlock failed: ", err)
return 2
}
blockSummaries := make([]apitypes.BlockDataBasic, height+1)
blocks := make(map[int64]*hcutil.Block)
for i := int64(0); i < height+1; i++ {
blockhash, err := client.GetBlockHash(i)
if err != nil {
log.Errorf("GetBlockHash(%d) failed: %v", i, err)
return 3
}
msgBlock, err := client.GetBlock(blockhash)
if err != nil {
log.Errorf("GetBlock failed (%s): %v", blockhash, err)
return 4
}
blocks[i] = hcutil.NewBlock(msgBlock)
// info, err := client.GetInfo()
// if err != nil {
// log.Errorf("GetInfo failed: %v", err)
// return 5
// }
if i%500 == 0 {
log.Infof("%d", msgBlock.Header.Height)
}
header := msgBlock.Header
diffRatio := getDifficultyRatio(header.Bits)
blockSummaries[i] = apitypes.BlockDataBasic{
Height: header.Height,
Size: header.Size,
Hash: blockhash.String(),
Difficulty: diffRatio,
StakeDiff: hcutil.Amount(header.SBits).ToCoin(),
Time: header.Timestamp.Unix(),
PoolInfo: apitypes.TicketPoolInfo{
Size: header.PoolSize,
},
}
}
log.Info("Building stake tree to compute pool values...")
dbName := "ffldb_stake"
stakeDB, poolValues, err := txhelpers.BuildStakeTree(blocks,
activeNetParams, client, 0, dbName)
if err != nil {
log.Errorf("Failed to create stake db: %v", err)
return 8
}
defer os.RemoveAll(dbName)
defer stakeDB.Close()
log.Info("Extracting pool values...")
for i := range blockSummaries {
blockSummaries[i].PoolInfo.Value = hcutil.Amount(poolValues[i]).ToCoin()
if blockSummaries[i].PoolInfo.Size > 0 {
blockSummaries[i].PoolInfo.ValAvg = blockSummaries[i].PoolInfo.Value / float64(blockSummaries[i].PoolInfo.Size)
} else {
blockSummaries[i].PoolInfo.ValAvg = 0
}
}
// write
fname := "fullscan.json"
//fullfile := filepath.Join(folder, fname)
fp, err := os.Create(fname)
if err != nil {
log.Errorf("Unable to open file %v for writing: %v", fname, err)
return 6
}
defer fp.Close()
if err := json.NewEncoder(fp).Encode(blockSummaries); err != nil {
log.Printf("JSON encode error: %v", err)
return 7
}
return 0
}
func main() {
os.Exit(mainCore())
}
func init() {
err := InitLogger()
if err != nil {
fmt.Printf("Unable to start logger: %v", err)
os.Exit(1)
}
backendLog = btclog.NewBackend(log.Writer())
rpcclientLogger = backendLog.Logger("RPC")
hcrpcclient.UseLogger(rpcclientLogger)
rpcutils.UseLogger(rpcclientLogger)
}
// getDifficultyRatio returns the proof-of-work difficulty as a multiple of the
// minimum difficulty using the passed bits field from the header of a block.
func getDifficultyRatio(bits uint32) float64 {
// The minimum difficulty is the max possible proof-of-work limit bits
// converted back to a number. Note this is not the same as the proof of
// work limit directly because the block difficulty is encoded in a block
// with the compact form which loses precision.
max := blockchain.CompactToBig(activeNetParams.PowLimitBits)
target := blockchain.CompactToBig(bits)
difficulty := new(big.Rat).SetFrac(max, target)
outString := difficulty.FloatString(8)
diff, err := strconv.ParseFloat(outString, 64)
if err != nil {
log.Errorf("Cannot get difficulty: %v", err)
return 0
}
return diff
}