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main.go
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main.go
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package main
import (
"context"
"fmt"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethclient"
"log"
"math/big"
"net/http"
"os"
"strconv"
"strings"
"time"
)
var (
eth *ethclient.Client
geth *GethInfo
delay int
watchingAddresses string
taskPrefix string
addresses map[string]Address
)
func init() {
geth = new(GethInfo)
addresses = make(map[string]Address)
geth.TotalEth = big.NewInt(0)
}
type GethInfo struct {
GethServer string
ContractsCreated int64
TokenTransfers int64
ContractCalls int64
EthTransfers int64
BlockSize float64
LoadTime float64
TotalEth *big.Int
CurrentBlock *types.Block
Sync *ethereum.SyncProgress
LastBlockUpdate time.Time
SugGasPrice *big.Int
PendingTx uint
NetworkId *big.Int
}
type Address struct {
Balance *big.Int
Address string
Nonce uint64
}
func main() {
var err error
defer eth.Close()
geth.GethServer = os.Getenv("GETH")
watchingAddresses = os.Getenv("ADDRESSES")
taskPrefix = os.Getenv("PREFIX")
if len(taskPrefix) == 0 {
taskPrefix = "geth-node"
}
delay, _ = strconv.Atoi(os.Getenv("DELAY"))
if delay == 0 {
delay = 500
}
log.Printf("Connecting to Ethereum node: %v\n", geth.GethServer)
eth, err = ethclient.Dial(geth.GethServer)
if err != nil {
panic(err)
}
geth.CurrentBlock, err = eth.BlockByNumber(context.TODO(), nil)
if err != nil {
panic(err)
}
go Routine()
log.Printf("Geth Exporter running on http://localhost:9090/metrics\n")
http.HandleFunc("/metrics", MetricsHttp)
err = http.ListenAndServe(":9090", nil)
if err != nil {
panic(err)
}
}
func CalculateTotals(block *types.Block) {
geth.TotalEth = big.NewInt(0)
geth.ContractsCreated = 0
geth.TokenTransfers = 0
geth.EthTransfers = 0
for _, b := range block.Transactions() {
if b.To() == nil {
geth.ContractsCreated++
}
if len(b.Data()) >= 4 {
method := hexutil.Encode(b.Data()[:4])
if method == "0xa9059cbb" {
geth.TokenTransfers++
}
}
if b.Value().Sign() == 1 {
geth.EthTransfers++
}
geth.TotalEth.Add(geth.TotalEth, b.Value())
}
size := strings.Split(geth.CurrentBlock.Size().String(), " ")
geth.BlockSize = stringToFloat(size[0]) * 1000
}
func Routine() {
var lastBlock *types.Block
ctx := context.Background()
for {
t1 := time.Now()
var err error
geth.CurrentBlock, err = eth.BlockByNumber(ctx, nil)
if err != nil {
log.Printf("issue with response from geth server: %v\n", geth.CurrentBlock)
time.Sleep(time.Duration(delay) * time.Millisecond)
continue
}
geth.SugGasPrice, _ = eth.SuggestGasPrice(ctx)
geth.PendingTx, _ = eth.PendingTransactionCount(ctx)
geth.NetworkId, _ = eth.NetworkID(ctx)
geth.Sync, _ = eth.SyncProgress(ctx)
if lastBlock == nil || geth.CurrentBlock.NumberU64() > lastBlock.NumberU64() {
log.Printf("Received block #%v with %v transactions (%v)\n", geth.CurrentBlock.NumberU64(), len(geth.CurrentBlock.Transactions()), geth.CurrentBlock.Hash().String())
geth.LastBlockUpdate = time.Now()
geth.LoadTime = time.Now().Sub(t1).Seconds()
}
if watchingAddresses != "" {
for _, a := range strings.Split(watchingAddresses, ",") {
addr := common.HexToAddress(a)
balance, _ := eth.BalanceAt(ctx, addr, geth.CurrentBlock.Number())
nonce, _ := eth.NonceAt(ctx, addr, geth.CurrentBlock.Number())
address := Address{
Address: addr.String(),
Balance: balance,
Nonce: nonce,
}
addresses[a] = address
}
}
lastBlock = geth.CurrentBlock
time.Sleep(time.Duration(delay) * time.Millisecond)
}
}
//
// HTTP response handler for /metrics
func MetricsHttp(w http.ResponseWriter, r *http.Request) {
var allOut []string
block := geth.CurrentBlock
if block == nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(fmt.Sprintf("issue receiving block from URL: %v", geth.GethServer)))
return
}
CalculateTotals(block)
allOut = append(allOut, fmt.Sprintf("%v_eth_block %v",taskPrefix, block.NumberU64()))
allOut = append(allOut, fmt.Sprintf("%v_eth_seconds_last_block %0.2f",taskPrefix, time.Now().Sub(geth.LastBlockUpdate).Seconds()))
allOut = append(allOut, fmt.Sprintf("%v_eth_block_transactions %v",taskPrefix, len(block.Transactions())))
allOut = append(allOut, fmt.Sprintf("%v_eth_block_value %v",taskPrefix, ToEther(geth.TotalEth)))
allOut = append(allOut, fmt.Sprintf("%v_eth_block_gas_used %v",taskPrefix, block.GasUsed()))
allOut = append(allOut, fmt.Sprintf("%v_eth_block_gas_limit %v",taskPrefix, block.GasLimit()))
allOut = append(allOut, fmt.Sprintf("%v_eth_block_nonce %v",taskPrefix, block.Nonce()))
allOut = append(allOut, fmt.Sprintf("%v_eth_block_difficulty %v",taskPrefix, block.Difficulty()))
allOut = append(allOut, fmt.Sprintf("%v_eth_block_uncles %v",taskPrefix, len(block.Uncles())))
allOut = append(allOut, fmt.Sprintf("%v_eth_block_size_bytes %v",taskPrefix, geth.BlockSize))
allOut = append(allOut, fmt.Sprintf("%v_eth_gas_price %v",taskPrefix, geth.SugGasPrice))
allOut = append(allOut, fmt.Sprintf("%v_eth_pending_transactions %v",taskPrefix, geth.PendingTx))
allOut = append(allOut, fmt.Sprintf("%v_eth_network_id %v",taskPrefix, geth.NetworkId))
allOut = append(allOut, fmt.Sprintf("%v_eth_contracts_created %v",taskPrefix, geth.ContractsCreated))
allOut = append(allOut, fmt.Sprintf("%v_eth_token_transfers %v",taskPrefix, geth.TokenTransfers))
allOut = append(allOut, fmt.Sprintf("%v_eth_eth_transfers %v",taskPrefix, geth.EthTransfers))
allOut = append(allOut, fmt.Sprintf("%v_eth_load_time %0.4f",taskPrefix, geth.LoadTime))
if geth.Sync != nil {
allOut = append(allOut, fmt.Sprintf("%v_eth_known_states %v",taskPrefix, int(geth.Sync.KnownStates)))
allOut = append(allOut, fmt.Sprintf("%v_eth_highest_block %v",taskPrefix, int(geth.Sync.HighestBlock)))
allOut = append(allOut, fmt.Sprintf("%v_eth_pulled_states %v",taskPrefix, int(geth.Sync.PulledStates)))
}
for _, v := range addresses {
allOut = append(allOut, fmt.Sprintf("%v_eth_address_balance{address=\"%v\"} %v",taskPrefix, v.Address, ToEther(v.Balance).String()))
allOut = append(allOut, fmt.Sprintf("%v_eth_address_nonce{address=\"%v\"} %v",taskPrefix, v.Address, v.Nonce))
}
w.Write([]byte(strings.Join(allOut, "\n")))
}
// stringToFloat will simply convert a string to a float
func stringToFloat(s string) float64 {
amount, _ := strconv.ParseFloat(s, 10)
return amount
}
//
// CONVERTS WEI TO ETH
func ToEther(o *big.Int) *big.Float {
pul, int := big.NewFloat(0), big.NewFloat(0)
int.SetInt(o)
pul.Mul(big.NewFloat(0.000000000000000001), int)
return pul
}