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supply.go
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/
supply.go
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package supplyservice
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"math"
"math/big"
"os"
"time"
"github.com/diadata-org/diadata/pkg/dia"
utils "github.com/diadata-org/diadata/pkg/utils"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethclient"
log "github.com/sirupsen/logrus"
)
var (
numMaxRetryCG = 4
waitRetrySeconds = 60
apiKey = utils.Getenv("COINGECKO_SUPPLY_API_KEY", "")
)
type CGCoin struct {
Address string `json:"contract_address"`
MarketData CGMarketData `json:"market_data"`
Platform string `json:"asset_platform_id"`
}
type CGMarketData struct {
TotalSupply float64 `json:"total_supply"`
CirculatingSupply float64 `json:"circulating_supply"`
}
func GetETHSuppliesFromCG() (supplies []dia.Supply, err error) {
IDs, err := getAllIDsCG()
if err != nil {
return
}
for _, ID := range IDs {
retries := 0
var coin CGCoin
var err error
var status int
for retries < numMaxRetryCG {
coin, status, err = getCGCoinInfo(ID)
if err != nil {
if status == 429 {
time.Sleep(time.Duration(waitRetrySeconds) * time.Second)
log.Info("rate limitation: sleep")
retries++
} else {
log.Error("get coin info: ", err)
break
}
} else {
time.Sleep(1000 * time.Millisecond)
break
}
}
if coin.Address != "" && coin.Platform == "ethereum" {
supply := dia.Supply{
Asset: dia.Asset{
Address: common.HexToAddress(coin.Address).Hex(),
Blockchain: dia.ETHEREUM,
},
Supply: coin.MarketData.TotalSupply,
CirculatingSupply: coin.MarketData.CirculatingSupply,
}
supplies = append(supplies, supply)
}
}
return
}
func getCGCoinInfo(id string) (coin CGCoin, status int, err error) {
var resp []byte
resp, status, err = utils.GetRequest("https://pro-api.coingecko.com/api/v3/coins/" + id + "?x_cg_pro_api_key=" + apiKey)
if err != nil {
return
}
err = json.Unmarshal(resp, &coin)
if err != nil {
return
}
if id == "ethereum" {
coin.Address = "0x0000000000000000000000000000000000000000"
coin.Platform = "ethereum"
}
return
}
func getAllIDsCG() (IDs []string, err error) {
resp, _, err := utils.GetRequest("https://api.coingecko.com/api/v3/coins/list")
if err != nil {
return
}
var data []interface{}
err = json.Unmarshal(resp, &data)
if err != nil {
return
}
for _, item := range data {
token := item.(map[string]interface{})
IDs = append(IDs, token["id"].(string))
}
return
}
// GetLockedWalletsFromConfig returns a map which maps an asset to the list of its locked wallets
func GetLockedWalletsFromConfig(filename string) (allAssetsMap map[string][]string, err error) {
var jsonFile *os.File
executionMode := os.Getenv("EXEC_MODE")
if executionMode == "production" {
jsonFile, err = os.Open(fmt.Sprintf("/config/token_supply/%s.json", filename))
} else {
jsonFile, err = os.Open(fmt.Sprintf("../../../config/token_supply/%s.json", filename))
}
if err != nil {
log.Errorln("Error opening file", err)
return
}
defer func() {
cerr := jsonFile.Close()
if err == nil {
err = cerr
}
}()
byteData, err := ioutil.ReadAll(jsonFile)
if err != nil {
log.Error(err)
return
}
type lockedAsset struct {
Address string `json:"asset"`
LockedWallets []string `json:"wallets"`
}
type lockedAssetList struct {
AllAssets []lockedAsset `json:"lockedWallets"`
}
var allAssets lockedAssetList
err = json.Unmarshal(byteData, &allAssets)
if err != nil {
return
}
// make map[string][]string from allAssets. This accounts for erroneous addition of new entry
// for already existing asset in config file.
var diff []string
for _, asset := range allAssets.AllAssets {
if _, ok := allAssetsMap[asset.Address]; !ok {
allAssetsMap[asset.Address] = asset.LockedWallets
} else {
diff = utils.SliceDifference(asset.LockedWallets, allAssetsMap[asset.Address])
allAssetsMap[asset.Address] = append(allAssetsMap[asset.Address], diff...)
}
}
return
}
// GetWalletBalance returns balance of token with address @tokenAddr in wallet with address @walletAddr
func GetWalletBalance(walletAddr string, tokenAddr string, c *ethclient.Client) (balance float64, err error) {
instance, err := NewERC20(common.HexToAddress(tokenAddr), c)
if err != nil {
log.Fatal(err)
return
}
decimals, err := instance.Decimals(&bind.CallOpts{})
if err != nil {
log.Error(err)
return
}
walletBal, err := instance.BalanceOf(&bind.CallOpts{}, common.HexToAddress(walletAddr))
if err != nil {
log.Errorf("failed to retrieve token owner balance from wallet %s: %v \n", walletAddr, err)
return
}
fbal := new(big.Float)
fbal.SetString(walletBal.String())
balance, _ = new(big.Float).Quo(fbal, big.NewFloat(math.Pow10(int(decimals)))).Float64()
return
}
// GetTotalSupplyfromMainNet returns total supply minus wallets' balances from list of wallets
func GetTotalSupplyfromMainNet(tokenAddress string, lockedWallets []string, client *ethclient.Client) (supply dia.Supply, err error) {
instance, err := NewERC20(common.HexToAddress(tokenAddress), client)
if err != nil {
log.Error("error getting token contract: ", err)
return
}
totalSupply, err := instance.TotalSupply(&bind.CallOpts{})
if err != nil {
return
}
symbol, err := instance.Symbol(&bind.CallOpts{})
if err != nil {
return
}
name, err := instance.Name(&bind.CallOpts{})
if err != nil {
return
}
decimals, err := instance.Decimals(&bind.CallOpts{})
if err != nil {
return
}
// Get total supply
fbal := new(big.Float)
fbal.SetString(totalSupply.String())
valuei := new(big.Float).Quo(fbal, big.NewFloat(math.Pow10(int(decimals))))
totalSupp, _ := valuei.Float64()
// Subtract locked wallets' balances from total supply for circulating supply
circulatingSupply := totalSupp
for _, walletAddress := range lockedWallets {
var balance float64
balance, err = GetWalletBalance(walletAddress, tokenAddress, client)
if err != nil {
log.Errorf("error getting wallet balance for wallet %s \n", walletAddress)
}
circulatingSupply = circulatingSupply - balance
}
header, err := client.HeaderByNumber(context.Background(), nil)
if err != nil {
log.Fatal(err)
}
asset := dia.Asset{
Symbol: symbol,
Name: name,
Decimals: decimals,
Address: common.HexToAddress(tokenAddress).Hex(),
Blockchain: dia.ETHEREUM,
}
supply = dia.Supply{
Asset: asset,
Supply: totalSupp,
CirculatingSupply: circulatingSupply,
Source: "diadata.org",
Time: time.Unix(int64(header.Time), 0),
}
return
}