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uniswapv3.go
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uniswapv3.go
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package source
import (
"math/big"
"strconv"
"strings"
uniswapcontract "github.com/diadata-org/diadata/pkg/dia/scraper/exchange-scrapers/uniswap"
uniswapcontractv3 "github.com/diadata-org/diadata/pkg/dia/scraper/exchange-scrapers/uniswapv3"
models "github.com/diadata-org/diadata/pkg/model"
"github.com/diadata-org/diadata/pkg/utils"
"github.com/diadata-org/diadata/pkg/dia"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethclient"
)
type UniswapV3AssetSource struct {
RestClient *ethclient.Client
WsClient *ethclient.Client
relDB *models.RelDB
// signaling channels for session initialization and finishing
assetChannel chan dia.Asset
doneChannel chan bool
exchange dia.Exchange
startBlock uint64
factoryContract string
waitTime int
}
// NewUniswapV3AssetSource returns a new UniswapV3AssetSource
func NewUniswapV3AssetSource(exchange dia.Exchange, relDB *models.RelDB) *UniswapV3AssetSource {
log.Info("NewUniswapV3Scraper ", exchange.Name)
log.Info("NewUniswapV3Scraper Address ", exchange.Contract)
var uas *UniswapV3AssetSource
switch exchange.Name {
case dia.UniswapExchangeV3:
uas = makeUniswapV3AssetSource(exchange, "", "", relDB, "200", uint64(12369621))
case dia.UniswapExchangeV3Polygon:
uas = makeUniswapV3AssetSource(exchange, "", "", relDB, "200", uint64(22757913))
case dia.UniswapExchangeV3Arbitrum:
uas = makeUniswapV3AssetSource(exchange, "", "", relDB, "200", uint64(165))
case dia.PanCakeSwapExchangeV3:
uas = makeUniswapV3AssetSource(exchange, "", "", relDB, "200", uint64(26956207))
}
go func() {
uas.fetchAssets()
}()
return uas
}
// makeUniswapV3AssetSource returns a uniswap asset source.
func makeUniswapV3AssetSource(exchange dia.Exchange, restDial string, wsDial string, relDB *models.RelDB, waitMilliseconds string, startBlock uint64) *UniswapV3AssetSource {
var (
restClient *ethclient.Client
wsClient *ethclient.Client
err error
uas *UniswapV3AssetSource
assetChannel = make(chan dia.Asset)
doneChannel = make(chan bool)
)
log.Infof("Init rest and ws 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)
}
wsClient, err = ethclient.Dial(utils.Getenv(strings.ToUpper(exchange.BlockChain.Name)+"_URI_WS", wsDial))
if err != nil {
log.Fatal("init rest client: ", err)
}
var waitTime int
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
}
uas = &UniswapV3AssetSource{
RestClient: restClient,
WsClient: wsClient,
relDB: relDB,
assetChannel: assetChannel,
doneChannel: doneChannel,
exchange: exchange,
startBlock: startBlock,
factoryContract: exchange.Contract,
waitTime: waitTime,
}
return uas
}
// getNumPairs returns the number of available pairs on Uniswap
func (uas *UniswapV3AssetSource) fetchAssets() {
// filter from contract created https://etherscan.io/tx/0x1e20cd6d47d7021ae7e437792823517eeadd835df09dde17ab45afd7a5df4603
log.Info("get pool creations from address: ", uas.factoryContract)
poolsCount := 0
var blocknumber int64
checkMap := make(map[string]struct{})
_, startblock, err := uas.relDB.GetScraperIndex(uas.exchange.Name, dia.SCRAPER_TYPE_ASSETCOLLECTOR)
if err != nil {
log.Error("GetScraperIndex: ", err)
} else {
uas.startBlock = uint64(startblock)
}
contract, err := uniswapcontractv3.NewUniswapV3Filterer(common.HexToAddress(uas.factoryContract), uas.WsClient)
if err != nil {
log.Error(err)
}
poolCreated, err := contract.FilterPoolCreated(
&bind.FilterOpts{Start: uas.startBlock},
[]common.Address{},
[]common.Address{},
[]*big.Int{},
)
if err != nil {
log.Error("filter pool created: ", err)
}
for poolCreated.Next() {
poolsCount++
log.Info("pools count: ", poolsCount)
blocknumber = int64(poolCreated.Event.Raw.BlockNumber)
// Don't repeat sending already sent assets
if _, ok := checkMap[poolCreated.Event.Token0.Hex()]; !ok {
checkMap[poolCreated.Event.Token0.Hex()] = struct{}{}
asset, err := uas.GetAssetFromAddress(poolCreated.Event.Token0)
if err != nil {
log.Warnf("cannot fetch asset from address %s: %v", poolCreated.Event.Token0.Hex(), err)
}
uas.assetChannel <- asset
}
if _, ok := checkMap[poolCreated.Event.Token1.Hex()]; !ok {
checkMap[poolCreated.Event.Token1.Hex()] = struct{}{}
asset, err := uas.GetAssetFromAddress(poolCreated.Event.Token1)
if err != nil {
log.Warnf("cannot fetch asset from address %s: %v", poolCreated.Event.Token1.Hex(), err)
}
uas.assetChannel <- asset
}
}
err = uas.relDB.SetScraperIndex(uas.exchange.Name, dia.SCRAPER_TYPE_ASSETCOLLECTOR, dia.INDEX_TYPE_BLOCKNUMBER, blocknumber)
if err != nil {
log.Error("SetScraperIndex: ", err)
}
uas.doneChannel <- true
}
func (uas *UniswapV3AssetSource) GetAssetFromAddress(address common.Address) (asset dia.Asset, err error) {
connection := uas.RestClient
var tokenContract *uniswapcontract.IERC20Caller
tokenContract, err = uniswapcontract.NewIERC20Caller(address, connection)
if err != nil {
log.Error(err)
}
symbol, err := tokenContract.Symbol(&bind.CallOpts{})
if err != nil {
log.Error(err)
}
name, err := tokenContract.Name(&bind.CallOpts{})
if err != nil {
log.Error(err)
}
decimals, err := tokenContract.Decimals(&bind.CallOpts{})
if err != nil {
log.Error(err)
}
asset = dia.Asset{
Symbol: symbol,
Name: name,
Address: address.Hex(),
Blockchain: uas.exchange.BlockChain.Name,
Decimals: decimals,
}
return
}
func (uas *UniswapV3AssetSource) Asset() chan dia.Asset {
return uas.assetChannel
}
func (uas *UniswapV3AssetSource) Done() chan bool {
return uas.doneChannel
}