package bridge import ( "context" "math/big" "strings" "github.com/ethereum/go-ethereum" "github.com/ethereum/go-ethereum/accounts/abi" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/common/hexutil" ethTypes "github.com/ethereum/go-ethereum/core/types" "github.com/status-im/status-go/account" "github.com/status-im/status-go/contracts/ierc20" "github.com/status-im/status-go/eth-node/types" "github.com/status-im/status-go/params" "github.com/status-im/status-go/rpc" "github.com/status-im/status-go/services/wallet/token" "github.com/status-im/status-go/transactions" ) type TransferBridge struct { rpcClient *rpc.Client transactor *transactions.Transactor } func NewTransferBridge(rpcClient *rpc.Client, transactor *transactions.Transactor) *TransferBridge { return &TransferBridge{rpcClient: rpcClient, transactor: transactor} } func (s *TransferBridge) Name() string { return "Transfer" } func (s *TransferBridge) Can(from, to *params.Network, token *token.Token, balance *big.Int) (bool, error) { return from.ChainID == to.ChainID, nil } func (s *TransferBridge) CalculateFees(from, to *params.Network, token *token.Token, amountIn *big.Int, nativeTokenPrice, tokenPrice float64, gasPrice *big.Float) (*big.Int, *big.Int, error) { return big.NewInt(0), big.NewInt(0), nil } func (s *TransferBridge) EstimateGas(fromNetwork *params.Network, toNetwork *params.Network, from common.Address, to common.Address, token *token.Token, amountIn *big.Int) (uint64, error) { estimation := uint64(0) var err error if token.Symbol == "ETH" { estimation, err = s.transactor.EstimateGas(fromNetwork, from, to, amountIn, []byte("eth_sendRawTransaction")) if err != nil { return 0, err } } else { ethClient, err := s.rpcClient.EthClient(fromNetwork.ChainID) if err != nil { return 0, err } abi, err := abi.JSON(strings.NewReader(ierc20.IERC20ABI)) if err != nil { return 0, err } input, err := abi.Pack("transfer", to, amountIn, ) if err != nil { return 0, err } ctx := context.Background() msg := ethereum.CallMsg{ From: from, To: &token.Address, Data: input, } estimation, err = ethClient.EstimateGas(ctx, msg) if err != nil { return 0, err } } increasedEstimation := float64(estimation) * IncreaseEstimatedGasFactor return uint64(increasedEstimation), nil } func (s *TransferBridge) BuildTx(network *params.Network, fromAddress common.Address, toAddress common.Address, token *token.Token, amountIn *big.Int) (*ethTypes.Transaction, error) { toAddr := types.Address(toAddress) if strings.EqualFold(token.Symbol, "ETH") { sendArgs := &TransactionBridge{ TransferTx: &transactions.SendTxArgs{ From: types.Address(fromAddress), To: &toAddr, Value: (*hexutil.Big)(amountIn), Data: types.HexBytes("0x0"), }, ChainID: network.ChainID, } return s.BuildTransaction(sendArgs) } abi, err := abi.JSON(strings.NewReader(ierc20.IERC20ABI)) if err != nil { return nil, err } input, err := abi.Pack("transfer", toAddress, amountIn, ) if err != nil { return nil, err } sendArgs := &TransactionBridge{ TransferTx: &transactions.SendTxArgs{ From: types.Address(fromAddress), To: &toAddr, Value: (*hexutil.Big)(big.NewInt(0)), Data: input, }, ChainID: network.ChainID, } return s.BuildTransaction(sendArgs) } func (s *TransferBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (types.Hash, error) { return s.transactor.SendTransactionWithChainID(sendArgs.ChainID, *sendArgs.TransferTx, verifiedAccount) } func (s *TransferBridge) BuildTransaction(sendArgs *TransactionBridge) (*ethTypes.Transaction, error) { return s.transactor.ValidateAndBuildTransaction(sendArgs.ChainID, *sendArgs.TransferTx) } func (s *TransferBridge) CalculateAmountOut(from, to *params.Network, amountIn *big.Int, symbol string) (*big.Int, error) { return amountIn, nil } func (s *TransferBridge) GetContractAddress(network *params.Network, token *token.Token) *common.Address { return nil }