287 lines
9.4 KiB
Go
287 lines
9.4 KiB
Go
package pathprocessor
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import (
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"context"
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"math/big"
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"strconv"
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"sync"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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ethTypes "github.com/ethereum/go-ethereum/core/types"
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"github.com/status-im/status-go/account"
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"github.com/status-im/status-go/eth-node/types"
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"github.com/status-im/status-go/rpc"
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walletCommon "github.com/status-im/status-go/services/wallet/common"
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"github.com/status-im/status-go/services/wallet/thirdparty/paraswap"
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walletToken "github.com/status-im/status-go/services/wallet/token"
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"github.com/status-im/status-go/transactions"
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)
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type SwapParaswapTxArgs struct {
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transactions.SendTxArgs
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ChainID uint64 `json:"chainId"`
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ChainIDTo uint64 `json:"chainIdTo"`
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TokenIDFrom string `json:"tokenIdFrom"`
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TokenIDTo string `json:"tokenIdTo"`
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SlippagePercentage float32 `json:"slippagePercentage"`
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}
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type SwapParaswapProcessor struct {
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paraswapClient paraswap.ClientInterface
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transactor transactions.TransactorIface
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priceRoute sync.Map // [fromChainName-toChainName-fromTokenSymbol-toTokenSymbol, paraswap.Route]
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}
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const (
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partnerID = "status.app"
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)
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func getPartnerAddressAndFeePcnt(chainID uint64) (common.Address, float64) {
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const partnerFeePcnt = 0.7
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switch chainID {
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case walletCommon.EthereumMainnet:
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return common.HexToAddress("0xd9abc564bfabefa88a6C2723d78124579600F568"), partnerFeePcnt
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case walletCommon.OptimismMainnet:
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return common.HexToAddress("0xE9B59dC0b30cd4646430c25de0111D651c395775"), partnerFeePcnt
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case walletCommon.ArbitrumMainnet:
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return common.HexToAddress("0x9a8278e856C0B191B9daa2d7DD1f7B28268E4DA2"), partnerFeePcnt
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}
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return common.Address{}, 0
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}
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func NewSwapParaswapProcessor(rpcClient *rpc.Client, transactor transactions.TransactorIface, tokenManager *walletToken.Manager) *SwapParaswapProcessor {
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defaultChainID := walletCommon.EthereumMainnet
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partnerAddress, partnerFeePcnt := getPartnerAddressAndFeePcnt(defaultChainID)
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return &SwapParaswapProcessor{
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paraswapClient: paraswap.NewClientV5(
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defaultChainID,
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partnerID,
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partnerAddress,
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partnerFeePcnt,
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),
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transactor: transactor,
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priceRoute: sync.Map{},
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}
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}
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func createSwapParaswapErrorResponse(err error) error {
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switch err.Error() {
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case "Price Timeout":
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return ErrPriceTimeout
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case "No routes found with enough liquidity":
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return ErrNotEnoughLiquidity
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case "ESTIMATED_LOSS_GREATER_THAN_MAX_IMPACT":
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return ErrPriceImpactTooHigh
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}
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return createErrorResponse(ProcessorSwapParaswapName, err)
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}
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func (s *SwapParaswapProcessor) Name() string {
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return ProcessorSwapParaswapName
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}
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func (s *SwapParaswapProcessor) Clear() {
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s.priceRoute = sync.Map{}
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}
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func (s *SwapParaswapProcessor) AvailableFor(params ProcessorInputParams) (bool, error) {
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if params.FromChain == nil || params.ToChain == nil {
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return false, ErrNoChainSet
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}
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if params.FromToken == nil || params.ToToken == nil {
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return false, ErrToAndFromTokensMustBeSet
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}
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if params.FromChain.ChainID != params.ToChain.ChainID {
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return false, ErrFromAndToChainsMustBeSame
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}
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if params.FromToken.Symbol == params.ToToken.Symbol {
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return false, ErrFromAndToTokensMustBeDifferent
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}
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chainID := params.FromChain.ChainID
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partnerAddress, partnerFeePcnt := getPartnerAddressAndFeePcnt(chainID)
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s.paraswapClient.SetChainID(chainID)
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s.paraswapClient.SetPartnerAddress(partnerAddress)
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s.paraswapClient.SetPartnerFeePcnt(partnerFeePcnt)
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searchForToken := params.FromToken.Address == ZeroAddress
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searchForToToken := params.ToToken.Address == ZeroAddress
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if searchForToToken || searchForToken {
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tokensList, err := s.paraswapClient.FetchTokensList(context.Background())
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if err != nil {
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return false, createSwapParaswapErrorResponse(err)
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}
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for _, t := range tokensList {
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if searchForToken && t.Symbol == params.FromToken.Symbol {
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params.FromToken.Address = common.HexToAddress(t.Address)
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params.FromToken.Decimals = t.Decimals
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if !searchForToToken {
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break
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}
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}
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if searchForToToken && t.Symbol == params.ToToken.Symbol {
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params.ToToken.Address = common.HexToAddress(t.Address)
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params.ToToken.Decimals = t.Decimals
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if !searchForToken {
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break
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}
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}
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}
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}
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if params.FromToken.Address == ZeroAddress || params.ToToken.Address == ZeroAddress {
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return false, ErrCannotResolveTokens
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}
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return true, nil
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}
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func calcReceivedAmountAndFee(baseDestAmount *big.Int, feePcnt float64) (destAmount *big.Int, destFee *big.Int) {
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destAmount = new(big.Int).Set(baseDestAmount)
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destFee = new(big.Int).SetUint64(0)
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if feePcnt > 0 {
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baseDestAmountFloat := new(big.Float).SetInt(baseDestAmount)
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feePcntFloat := big.NewFloat(feePcnt / 100.0)
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destFeeFloat := new(big.Float).Set(baseDestAmountFloat)
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destFeeFloat = destFeeFloat.Mul(destFeeFloat, feePcntFloat)
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destFeeFloat.Int(destFee)
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destAmount = destAmount.Sub(destAmount, destFee)
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}
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return
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}
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func (s *SwapParaswapProcessor) CalculateFees(params ProcessorInputParams) (*big.Int, *big.Int, error) {
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return ZeroBigIntValue, ZeroBigIntValue, nil
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}
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func (s *SwapParaswapProcessor) PackTxInputData(params ProcessorInputParams) ([]byte, error) {
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// not sure what we can do here since we're using the api to build the transaction
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return []byte{}, nil
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}
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func (s *SwapParaswapProcessor) EstimateGas(params ProcessorInputParams) (uint64, error) {
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if params.TestsMode {
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if params.TestEstimationMap != nil {
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if val, ok := params.TestEstimationMap[s.Name()]; ok {
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return val.Value, val.Err
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}
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}
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return 0, ErrNoEstimationFound
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}
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swapSide := paraswap.SellSide
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if params.AmountOut != nil && params.AmountOut.Cmp(ZeroBigIntValue) > 0 {
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swapSide = paraswap.BuySide
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}
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priceRoute, err := s.paraswapClient.FetchPriceRoute(context.Background(), params.FromToken.Address, params.FromToken.Decimals,
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params.ToToken.Address, params.ToToken.Decimals, params.AmountIn, params.FromAddr, params.ToAddr, swapSide)
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if err != nil {
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return 0, createSwapParaswapErrorResponse(err)
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}
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key := makeKey(params.FromChain.ChainID, params.ToChain.ChainID, params.FromToken.Symbol, params.ToToken.Symbol)
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s.priceRoute.Store(key, &priceRoute)
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return priceRoute.GasCost.Uint64(), nil
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}
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func (s *SwapParaswapProcessor) GetContractAddress(params ProcessorInputParams) (address common.Address, err error) {
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key := makeKey(params.FromChain.ChainID, params.ToChain.ChainID, params.FromToken.Symbol, params.ToToken.Symbol)
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priceRouteIns, ok := s.priceRoute.Load(key)
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if !ok {
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err = ErrPriceRouteNotFound
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return
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}
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priceRoute := priceRouteIns.(*paraswap.Route)
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return priceRoute.TokenTransferProxy, nil
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}
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func (s *SwapParaswapProcessor) prepareTransaction(sendArgs *MultipathProcessorTxArgs) error {
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slippageBP := uint(sendArgs.SwapTx.SlippagePercentage * 100) // convert to basis points
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key := makeKey(sendArgs.SwapTx.ChainID, sendArgs.SwapTx.ChainIDTo, sendArgs.SwapTx.TokenIDFrom, sendArgs.SwapTx.TokenIDTo)
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priceRouteIns, ok := s.priceRoute.Load(key)
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if !ok {
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return ErrPriceRouteNotFound
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}
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priceRoute := priceRouteIns.(*paraswap.Route)
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tx, err := s.paraswapClient.BuildTransaction(context.Background(), priceRoute.SrcTokenAddress, priceRoute.SrcTokenDecimals, priceRoute.SrcAmount.Int,
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priceRoute.DestTokenAddress, priceRoute.DestTokenDecimals, priceRoute.DestAmount.Int, slippageBP,
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common.Address(sendArgs.SwapTx.From), common.Address(*sendArgs.SwapTx.To),
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priceRoute.RawPriceRoute, priceRoute.Side)
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if err != nil {
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return createSwapParaswapErrorResponse(err)
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}
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value, ok := new(big.Int).SetString(tx.Value, 10)
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if !ok {
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return ErrConvertingAmountToBigInt
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}
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gas, err := strconv.ParseUint(tx.Gas, 10, 64)
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if err != nil {
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return createSwapParaswapErrorResponse(err)
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}
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gasPrice, ok := new(big.Int).SetString(tx.GasPrice, 10)
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if !ok {
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return ErrConvertingAmountToBigInt
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}
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sendArgs.ChainID = tx.ChainID
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sendArgs.SwapTx.ChainID = tx.ChainID
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toAddr := types.HexToAddress(tx.To)
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sendArgs.SwapTx.From = types.HexToAddress(tx.From)
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sendArgs.SwapTx.To = &toAddr
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sendArgs.SwapTx.Value = (*hexutil.Big)(value)
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sendArgs.SwapTx.Gas = (*hexutil.Uint64)(&gas)
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sendArgs.SwapTx.GasPrice = (*hexutil.Big)(gasPrice)
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sendArgs.SwapTx.Data = types.Hex2Bytes(tx.Data)
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return nil
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}
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func (s *SwapParaswapProcessor) BuildTransaction(sendArgs *MultipathProcessorTxArgs, lastUsedNonce int64) (*ethTypes.Transaction, uint64, error) {
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err := s.prepareTransaction(sendArgs)
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if err != nil {
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return nil, 0, createSwapParaswapErrorResponse(err)
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}
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return s.transactor.ValidateAndBuildTransaction(sendArgs.ChainID, sendArgs.SwapTx.SendTxArgs, lastUsedNonce)
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}
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func (s *SwapParaswapProcessor) Send(sendArgs *MultipathProcessorTxArgs, lastUsedNonce int64, verifiedAccount *account.SelectedExtKey) (types.Hash, uint64, error) {
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err := s.prepareTransaction(sendArgs)
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if err != nil {
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return types.Hash{}, 0, createSwapParaswapErrorResponse(err)
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}
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return s.transactor.SendTransactionWithChainID(sendArgs.ChainID, sendArgs.SwapTx.SendTxArgs, lastUsedNonce, verifiedAccount)
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}
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func (s *SwapParaswapProcessor) CalculateAmountOut(params ProcessorInputParams) (*big.Int, error) {
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key := makeKey(params.FromChain.ChainID, params.ToChain.ChainID, params.FromToken.Symbol, params.ToToken.Symbol)
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priceRouteIns, ok := s.priceRoute.Load(key)
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if !ok {
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return nil, ErrPriceRouteNotFound
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}
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priceRoute := priceRouteIns.(*paraswap.Route)
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_, partnerFeePcnt := getPartnerAddressAndFeePcnt(params.FromChain.ChainID)
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destAmount, _ := calcReceivedAmountAndFee(priceRoute.DestAmount.Int, partnerFeePcnt)
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return destAmount, nil
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}
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