package bridge import ( "context" "fmt" "math/big" "strings" "github.com/ethereum/go-ethereum" "github.com/ethereum/go-ethereum/accounts/abi" "github.com/ethereum/go-ethereum/accounts/abi/bind" "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/ierc1155" "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 ERC1155TransferTxArgs struct { transactions.SendTxArgs TokenID *hexutil.Big `json:"tokenId"` Recipient common.Address `json:"recipient"` Amount *hexutil.Big `json:"amount"` } type ERC1155TransferBridge struct { rpcClient *rpc.Client transactor *transactions.Transactor } func NewERC1155TransferBridge(rpcClient *rpc.Client, transactor *transactions.Transactor) *ERC1155TransferBridge { return &ERC1155TransferBridge{rpcClient: rpcClient, transactor: transactor} } func (s *ERC1155TransferBridge) Name() string { return "ERC1155Transfer" } func (s *ERC1155TransferBridge) Can(from, to *params.Network, token *token.Token, balance *big.Int) (bool, error) { return from.ChainID == to.ChainID, nil } func (s *ERC1155TransferBridge) 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 *ERC1155TransferBridge) EstimateGas(fromNetwork *params.Network, toNetwork *params.Network, from common.Address, to common.Address, token *token.Token, amountIn *big.Int) (uint64, error) { ethClient, err := s.rpcClient.EthClient(fromNetwork.ChainID) if err != nil { return 0, err } var input []byte value := new(big.Int) abi, err := abi.JSON(strings.NewReader(ierc1155.Ierc1155ABI)) if err != nil { return 0, err } id, success := big.NewInt(0).SetString(token.Symbol, 0) if !success { return 0, fmt.Errorf("failed to convert %s to big.Int", token.Symbol) } input, err = abi.Pack("safeTransferFrom", from, to, id, amountIn, []byte{}, ) if err != nil { return 0, err } ctx := context.Background() if code, err := ethClient.PendingCodeAt(ctx, token.Address); err != nil { return 0, err } else if len(code) == 0 { return 0, bind.ErrNoCode } msg := ethereum.CallMsg{ From: from, To: &token.Address, Value: value, Data: input, } estimation, err := ethClient.EstimateGas(ctx, msg) if err != nil { return 0, err } increasedEstimation := float64(estimation) * IncreaseEstimatedGasFactor return uint64(increasedEstimation), nil } func (s *ERC1155TransferBridge) BuildTx(network *params.Network, fromAddress common.Address, toAddress common.Address, token *token.Token, amountIn *big.Int) (*ethTypes.Transaction, error) { contractAddress := types.Address(token.Address) // We store ERC1155 Token ID using big.Int.String() in token.Symbol tokenID, success := new(big.Int).SetString(token.Symbol, 10) if !success { return nil, fmt.Errorf("failed to convert ERC1155's Symbol %s to big.Int", token.Symbol) } sendArgs := &TransactionBridge{ ERC1155TransferTx: &ERC1155TransferTxArgs{ SendTxArgs: transactions.SendTxArgs{ From: types.Address(fromAddress), To: &contractAddress, Value: (*hexutil.Big)(amountIn), Data: types.HexBytes("0x0"), }, TokenID: (*hexutil.Big)(tokenID), Recipient: toAddress, Amount: (*hexutil.Big)(amountIn), }, ChainID: network.ChainID, } return s.BuildTransaction(sendArgs) } func (s *ERC1155TransferBridge) sendOrBuild(sendArgs *TransactionBridge, signerFn bind.SignerFn) (tx *ethTypes.Transaction, err error) { ethClient, err := s.rpcClient.EthClient(sendArgs.ChainID) if err != nil { return tx, err } contract, err := ierc1155.NewIerc1155(common.Address(*sendArgs.ERC1155TransferTx.To), ethClient) if err != nil { return tx, err } nonce, err := s.transactor.NextNonce(s.rpcClient, sendArgs.ChainID, sendArgs.ERC1155TransferTx.From) if err != nil { return tx, err } argNonce := hexutil.Uint64(nonce) sendArgs.ERC1155TransferTx.Nonce = &argNonce txOpts := sendArgs.ERC1155TransferTx.ToTransactOpts(signerFn) tx, err = contract.SafeTransferFrom( txOpts, common.Address(sendArgs.ERC1155TransferTx.From), sendArgs.ERC1155TransferTx.Recipient, sendArgs.ERC1155TransferTx.TokenID.ToInt(), sendArgs.ERC1155TransferTx.Amount.ToInt(), []byte{}, ) return tx, err } func (s *ERC1155TransferBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (hash types.Hash, err error) { tx, err := s.sendOrBuild(sendArgs, getSigner(sendArgs.ChainID, sendArgs.ERC1155TransferTx.From, verifiedAccount)) if err != nil { return hash, err } return types.Hash(tx.Hash()), nil } func (s *ERC1155TransferBridge) BuildTransaction(sendArgs *TransactionBridge) (*ethTypes.Transaction, error) { return s.sendOrBuild(sendArgs, nil) } func (s *ERC1155TransferBridge) CalculateAmountOut(from, to *params.Network, amountIn *big.Int, symbol string) (*big.Int, error) { return amountIn, nil } func (s *ERC1155TransferBridge) GetContractAddress(network *params.Network, token *token.Token) *common.Address { return &token.Address }