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UniswapV2.go
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UniswapV2.go
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package liquidityscrapers
import (
"encoding/json"
"io/ioutil"
"math"
"math/big"
"os"
"strconv"
"strings"
"time"
"github.com/diadata-org/diadata/pkg/dia/helpers/configCollectors"
"github.com/diadata-org/diadata/pkg/dia/scraper/exchange-scrapers/uniswap"
"github.com/diadata-org/diadata/pkg/dia"
"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"
)
type UniswapPair struct {
Token0 dia.Asset
Token1 dia.Asset
ForeignName string
Address common.Address
}
const (
restDialEthereum = ""
restDialBSC = ""
restDialPolygon = ""
restDialCelo = ""
restDialFantom = ""
restDialMoonriver = ""
restDialAurora = ""
restDialMetis = ""
restDialAvalanche = ""
restDialTelos = ""
restDialEvmos = ""
restDialAstar = ""
restDialMoonbeam = ""
restDialWanchain = ""
uniswapWaitMilliseconds = "25"
sushiswapWaitMilliseconds = "100"
pancakeswapWaitMilliseconds = "100"
dfynWaitMilliseconds = "100"
ubeswapWaitMilliseconds = "200"
spookyswapWaitMilliseconds = "200"
spiritswapWaitMilliseconds = "200"
solarbeamWaitMilliseconds = "200"
trisolarisWaitMilliseconds = "200"
metisWaitMilliseconds = "200"
moonriverWaitMilliseconds = "500"
avalancheWaitMilliseconds = "200"
telosWaitMilliseconds = "400"
evmosWaitMilliseconds = "400"
astarWaitMilliseconds = "1000"
moonbeamWaitMilliseconds = "1000"
wanchainWaitMilliseconds = "1000"
)
type UniswapScraper struct {
RestClient *ethclient.Client
poolChannel chan dia.Pool
doneChannel chan bool
blockchain string
waitTime int
exchangeName string
pathToPools string
}
var exchangeFactoryContractAddress string
func NewUniswapScraper(exchange dia.Exchange) (us *UniswapScraper) {
pathToPools := utils.Getenv("PATH_TO_POOLS", "")
switch exchange.Name {
case dia.UniswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialEthereum, uniswapWaitMilliseconds)
case dia.SushiSwapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialEthereum, sushiswapWaitMilliseconds)
case dia.SushiSwapExchangePolygon:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialPolygon, sushiswapWaitMilliseconds)
case dia.SushiSwapExchangeFantom:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialFantom, sushiswapWaitMilliseconds)
case dia.PanCakeSwap:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialBSC, pancakeswapWaitMilliseconds)
case dia.DfynNetwork:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialPolygon, dfynWaitMilliseconds)
case dia.QuickswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialPolygon, dfynWaitMilliseconds)
case dia.UbeswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialCelo, ubeswapWaitMilliseconds)
case dia.SpookyswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialFantom, spookyswapWaitMilliseconds)
case dia.SpiritswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialFantom, spiritswapWaitMilliseconds)
case dia.SolarbeamExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialMoonriver, solarbeamWaitMilliseconds)
case dia.TrisolarisExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialAurora, trisolarisWaitMilliseconds)
case dia.NetswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialMetis, metisWaitMilliseconds)
case dia.HuckleberryExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialMoonriver, moonriverWaitMilliseconds)
case dia.TraderJoeExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialAvalanche, avalancheWaitMilliseconds)
case dia.PangolinExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialAvalanche, avalancheWaitMilliseconds)
case dia.TethysExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialMetis, metisWaitMilliseconds)
case dia.HermesExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialMetis, metisWaitMilliseconds)
case dia.OmniDexExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialTelos, telosWaitMilliseconds)
case dia.DiffusionExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialEvmos, evmosWaitMilliseconds)
case dia.ArthswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialAstar, astarWaitMilliseconds)
case dia.ApeswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialAstar, astarWaitMilliseconds)
case dia.BiswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialAstar, astarWaitMilliseconds)
case dia.StellaswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialMoonbeam, moonbeamWaitMilliseconds)
case dia.WanswapExchange:
us = makeUniswapPoolScraper(exchange, pathToPools, restDialWanchain, wanchainWaitMilliseconds)
}
exchangeFactoryContractAddress = exchange.Contract
go func() {
us.fetchPools()
}()
return us
}
// makeUniswapPoolScraper returns an asset source as used in NewUniswapAssetSource.
func makeUniswapPoolScraper(exchange dia.Exchange, pathToPools string, restDial string, waitMilliseconds string) *UniswapScraper {
var (
restClient *ethclient.Client
err error
poolChannel = make(chan dia.Pool)
doneChannel = make(chan bool)
us *UniswapScraper
waitTime int
)
log.Infof("Init rest client for %s.", exchange.BlockChain.Name)
restClient, err = ethclient.Dial(utils.Getenv(strings.ToUpper(exchange.BlockChain.Name)+"_URI_REST", restDial))
if err != nil {
log.Fatal("init rest client: ", err)
}
waitTimeString := utils.Getenv(strings.ToUpper(exchange.BlockChain.Name)+"_WAIT_TIME", waitMilliseconds)
waitTime, err = strconv.Atoi(waitTimeString)
if err != nil {
log.Error("could not parse wait time: ", err)
waitTime = 500
}
us = &UniswapScraper{
RestClient: restClient,
poolChannel: poolChannel,
doneChannel: doneChannel,
blockchain: exchange.BlockChain.Name,
waitTime: waitTime,
exchangeName: exchange.Name,
pathToPools: pathToPools,
}
return us
}
// fetchPools iterates through all (Uniswap) pools and sends them into the pool channel.
// In case the path us.pathToPools is not empty, it only takes into account pools found in this path.
func (us *UniswapScraper) fetchPools() {
if us.pathToPools != "" {
// Collect all pool addresses from json file.
poolAddresses, err := getAddressesFromConfig("liquidity-scrapers/uniswapv2/" + us.pathToPools)
if err != nil {
log.Error("fetch pool addresses from config file: ", err)
}
numPairs := len(poolAddresses)
log.Infof("listening to %d pools: %v", numPairs, poolAddresses)
for _, pool := range poolAddresses {
time.Sleep(time.Duration(us.waitTime) * time.Millisecond)
pool, err := us.GetPoolByAddress(pool)
if err != nil {
log.Errorln("Error getting pool ", pool)
}
log.Info("found pool: ", pool)
us.poolChannel <- pool
}
} else {
numPairs, err := us.getNumPairs()
if err != nil {
log.Fatal(err)
}
log.Info("Found ", numPairs, " pools")
for i := 0; i < numPairs; i++ {
time.Sleep(time.Duration(us.waitTime) * time.Millisecond)
pool, err := us.GetPoolByID(int64(numPairs - 1 - i))
if err != nil {
log.Errorln("Error getting pair with ID ", numPairs-1-i)
}
log.Info("found pool: ", pool)
us.poolChannel <- pool
}
}
us.doneChannel <- true
}
// GetPoolByID returns the Uniswap Pool with the integer id @num.
func (us *UniswapScraper) GetPoolByID(num int64) (dia.Pool, error) {
var contract *uniswap.IUniswapV2FactoryCaller
contract, err := uniswap.NewIUniswapV2FactoryCaller(common.HexToAddress(exchangeFactoryContractAddress), us.RestClient)
if err != nil {
log.Error(err)
return dia.Pool{}, err
}
pairAddress, err := contract.AllPairs(&bind.CallOpts{}, big.NewInt(num))
if err != nil {
log.Error(err)
return dia.Pool{}, err
}
pool, err := us.GetPoolByAddress(pairAddress)
if err != nil {
log.Error(err)
return dia.Pool{}, err
}
return pool, err
}
// Get a pool by its LP token address.
func (us *UniswapScraper) GetPoolByAddress(pairAddress common.Address) (pool dia.Pool, err error) {
var (
pairContract *uniswap.IUniswapV2PairCaller
token0Contract *uniswap.IERC20Caller
token1Contract *uniswap.IERC20Caller
)
connection := us.RestClient
pairContract, err = uniswap.NewIUniswapV2PairCaller(pairAddress, connection)
if err != nil {
log.Error(err)
return dia.Pool{}, err
}
// Getting tokens from pair
address0, _ := pairContract.Token0(&bind.CallOpts{})
address1, _ := pairContract.Token1(&bind.CallOpts{})
token0Contract, err = uniswap.NewIERC20Caller(address0, connection)
if err != nil {
log.Error(err)
}
token1Contract, err = uniswap.NewIERC20Caller(address1, connection)
if err != nil {
log.Error(err)
}
symbol0, err := token0Contract.Symbol(&bind.CallOpts{})
if err != nil {
log.Error(err)
}
symbol1, err := token1Contract.Symbol(&bind.CallOpts{})
if err != nil {
log.Error(err)
}
decimals0, err := token0Contract.Decimals(&bind.CallOpts{})
if err != nil {
log.Error(err)
}
decimals1, err := token1Contract.Decimals(&bind.CallOpts{})
if err != nil {
log.Error(err)
}
name0, err := us.GetName(address0)
if err != nil {
log.Error("get name: ", err)
}
name1, err := us.GetName(address1)
if err != nil {
log.Error("get name: ", err)
}
token0 := dia.Asset{
Address: address0.Hex(),
Blockchain: us.blockchain,
Symbol: symbol0,
Name: name0,
Decimals: decimals0,
}
token1 := dia.Asset{
Address: address1.Hex(),
Blockchain: us.blockchain,
Symbol: symbol1,
Name: name1,
Decimals: decimals1,
}
// Getting liquidity
liquidity, err := pairContract.GetReserves(&bind.CallOpts{})
if err != nil {
log.Error("get reserves: ", err)
}
amount0, _ := new(big.Float).Quo(big.NewFloat(0).SetInt(liquidity.Reserve0), new(big.Float).SetFloat64(math.Pow10(int(token0.Decimals)))).Float64()
amount1, _ := new(big.Float).Quo(big.NewFloat(0).SetInt(liquidity.Reserve1), new(big.Float).SetFloat64(math.Pow10(int(token1.Decimals)))).Float64()
// TO DO: Fetch timestamp using block number?
pool.Time = time.Now()
// Fill Pool type with the above data
pool.Assetvolumes = append(pool.Assetvolumes, dia.AssetVolume{
Asset: token0,
Volume: amount0,
})
pool.Assetvolumes = append(pool.Assetvolumes, dia.AssetVolume{
Asset: token1,
Volume: amount1,
})
pool.Address = pairAddress.Hex()
pool.Blockchain = dia.BlockChain{Name: us.blockchain}
pool.Exchange = dia.Exchange{Name: us.exchangeName}
return pool, nil
}
// GetDecimals returns the decimals of the token with address @tokenAddress
func (us *UniswapScraper) GetDecimals(tokenAddress common.Address) (decimals uint8, err error) {
var contract *uniswap.IERC20Caller
contract, err = uniswap.NewIERC20Caller(tokenAddress, us.RestClient)
if err != nil {
log.Error(err)
return
}
decimals, err = contract.Decimals(&bind.CallOpts{})
return
}
func (us *UniswapScraper) GetName(tokenAddress common.Address) (name string, err error) {
var contract *uniswap.IERC20Caller
contract, err = uniswap.NewIERC20Caller(tokenAddress, us.RestClient)
if err != nil {
log.Error(err)
return
}
name, err = contract.Name(&bind.CallOpts{})
return
}
func (us *UniswapScraper) Pool() chan dia.Pool {
return us.poolChannel
}
func (us *UniswapScraper) Done() chan bool {
return us.doneChannel
}
func (us *UniswapScraper) getNumPairs() (int, error) {
var contract *uniswap.IUniswapV2FactoryCaller
contract, err := uniswap.NewIUniswapV2FactoryCaller(common.HexToAddress(exchangeFactoryContractAddress), us.RestClient)
if err != nil {
log.Error(err)
}
numPairs, err := contract.AllPairsLength(&bind.CallOpts{})
return int(numPairs.Int64()), err
}
// getAddressesFromConfig returns a list of Uniswap pool addresses taken from a config file.
func getAddressesFromConfig(filename string) (pairAddresses []common.Address, err error) {
// Load file and read data
filehandle := configCollectors.ConfigFileConnectors(filename, ".json")
jsonFile, err := os.Open(filehandle)
if err != nil {
return
}
defer func() {
err = jsonFile.Close()
if err != nil {
log.Error(err)
}
}()
byteData, err := ioutil.ReadAll(jsonFile)
if err != nil {
return
}
// Unmarshal read data
type scrapedPair struct {
Address string `json:"Address"`
ForeignName string `json:"ForeignName"`
}
type scrapedPairList struct {
AllPairs []scrapedPair `json:"Pools"`
}
var allPairs scrapedPairList
err = json.Unmarshal(byteData, &allPairs)
if err != nil {
return
}
// Extract addresses
for _, token := range allPairs.AllPairs {
pairAddresses = append(pairAddresses, common.HexToAddress(token.Address))
}
return
}