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distribute.go
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distribute.go
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package main
import (
"encoding/csv"
"encoding/hex"
"io"
"log"
"math"
"os"
"strconv"
"time"
"github.com/opentradingnetworkfoundation/otn-go/api"
"github.com/opentradingnetworkfoundation/otn-go/wallet"
"go.uber.org/ratelimit"
"github.com/spf13/cobra"
"github.com/opentradingnetworkfoundation/otn-go/objects"
)
var distributeCmd = cobra.Command{
Use: "distribute",
Short: "Distribute funds",
Run: distribute,
}
var distributeOptions struct {
input string
output string
asset string
amount float64
percent float64
from string
pvtKey string
commit bool
rateLimit int
}
func init() {
rootCmd.AddCommand(&distributeCmd)
distributeCmd.Flags().StringVarP(&distributeOptions.input, "input", "i", "", "Input file (output from listaccounts command)")
distributeCmd.Flags().StringVarP(&distributeOptions.output, "output", "o", "log.csv", "File to output transaction list")
distributeCmd.Flags().StringVar(&distributeOptions.asset, "asset", "OTN", "Specify asset")
distributeCmd.Flags().StringVar(&distributeOptions.from, "from", "", "Account to distribute funds from")
distributeCmd.Flags().StringVar(&distributeOptions.pvtKey, "key", "", "Private key for the funding account")
distributeCmd.Flags().Float64Var(&distributeOptions.amount, "amount", 0, "Amount to distribute")
distributeCmd.Flags().Float64Var(&distributeOptions.percent, "percent", 0, "Percent to pay out")
distributeCmd.Flags().IntVar(&distributeOptions.rateLimit, "rate", 10, "Maximum transactions per second")
distributeCmd.Flags().BoolVarP(&distributeOptions.commit, "commit", "c", false, "Perform actual transfers")
}
type accountBalance struct {
ID objects.GrapheneID
Name string
Balance uint64
}
func loadAccountBalances() ([]*accountBalance, uint64) {
file, err := os.Open(distributeOptions.input)
if err != nil {
log.Fatal(err)
}
defer file.Close()
reader := csv.NewReader(file)
accounts := make([]*accountBalance, 0)
var total uint64
for {
line, error := reader.Read()
if error == io.EOF {
break
} else if error != nil {
log.Fatal(error)
}
if len(line) < 3 {
log.Fatal("Invalid input file format")
}
balance, err := strconv.ParseUint(line[2], 10, 64)
if err != nil {
log.Fatalf("Failed to parse balance '%s': %v", line[2], err)
}
acc := &accountBalance{
ID: *objects.NewGrapheneID(objects.ObjectID(line[0])),
Name: line[1],
Balance: balance,
}
accounts = append(accounts, acc)
total += acc.Balance
}
return accounts, total
}
func distribute(cmd *cobra.Command, args []string) {
rpc := createNodeConnection()
dbAPI, err := rpc.DatabaseAPI()
if err != nil {
log.Fatalf("Failed to get database API: %v", err)
}
asset := getAsset(dbAPI, distributeOptions.asset)
wallet := wallet.NewWallet()
log.Printf("Asset: %s (%s)", asset.Symbol, asset.ID)
prec := math.Pow10(asset.Precision)
accounts, total := loadAccountBalances()
totalFl := float64(total) / prec
log.Printf("Total users balance: %f (%d users)", totalFl, len(accounts))
if distributeOptions.percent != 0 {
distributeOptions.amount = totalFl * distributeOptions.percent / 100.0
}
if distributeOptions.amount == 0 {
return
}
log.Printf("Amount to distribute: %f (%.2f percent of user balances)",
distributeOptions.amount, distributeOptions.amount*100/totalFl)
fromAccount, err := dbAPI.GetAccountByName(distributeOptions.from)
if err != nil {
log.Fatalf("Failed to get account '%s': %v", distributeOptions.from, err)
}
fromBalance, err := dbAPI.GetAccountBalances(fromAccount.ID, asset.ID)
if err != nil {
log.Fatalf("Failed to get account balance: %v", err)
}
if distributeOptions.pvtKey != "" {
if err := wallet.AddPrivateKeys([]string{distributeOptions.pvtKey}); err != nil {
log.Fatalf("Failed to import key: %v", err)
}
}
funds := float64(fromBalance[0].Amount) / prec
log.Printf("Account '%s' has %f %s", fromAccount.Name, funds, asset.Symbol)
if funds < distributeOptions.amount {
log.Fatalf("Account don't have sufficient funds to distribute %f %s",
distributeOptions.amount, asset.Symbol)
}
output, err := os.Create(distributeOptions.output)
if err != nil {
log.Fatalf("Failed to create output file: %v", err)
}
defer output.Close()
writer := csv.NewWriter(output)
defer writer.Flush()
var totalPayments float64
throttle := ratelimit.New(distributeOptions.rateLimit)
broadcastAPI, err := rpc.BroadcastAPI()
if err != nil {
log.Fatalf("Unable to get broadcast API: %v", err)
}
for _, acc := range accounts {
if acc.Balance == 0 {
continue
}
balance := float64(acc.Balance) / prec
userAmount := balance / totalFl * distributeOptions.amount
log.Printf("User: %s, balance %f, payment %f", acc.Name, balance, userAmount)
totalPayments += userAmount
transfer := &objects.TransferOperation{
From: fromAccount.ID,
To: acc.ID,
Amount: objects.AssetAmount{
Asset: asset.ID,
Amount: objects.Int64(userAmount * prec),
},
Extensions: objects.Extensions{},
}
tx, err := api.ConstructTransaction(dbAPI, &objects.CoreAssetID, transfer)
if err != nil {
log.Fatalf("Failed to create transaction: %v", err)
}
if err := api.SignTransaction(dbAPI, wallet.GetKeys(), tx); err != nil {
log.Fatalf("Failed to sign transaction: %v", err)
}
// apply rate limiting
throttle.Take()
if distributeOptions.commit {
if err := broadcastAPI.BroadcastTransaction(tx); err != nil {
log.Fatalf("Failed to broadcast transacton: %v", err)
}
}
txID := hex.EncodeToString(tx.ID())
log.Printf("TxID: %s", txID)
writer.Write([]string{
time.Now().Format(time.RFC3339),
acc.ID.String(),
acc.Name,
strconv.FormatUint(acc.Balance, 10),
strconv.FormatUint(uint64(transfer.Amount.Amount), 10),
txID,
})
}
log.Printf("Total payout: %f (requested: %f)", totalPayments, distributeOptions.amount)
}