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erc721_transfer.go
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erc721_transfer.go
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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/community-tokens/collectibles"
"github.com/status-im/status-go/eth-node/types"
"github.com/status-im/status-go/rpc"
"github.com/status-im/status-go/transactions"
)
type ERC721TransferTxArgs struct {
transactions.SendTxArgs
TokenID *hexutil.Big `json:"tokenId"`
Recipient common.Address `json:"recipient"`
}
type ERC721TransferBridge struct {
rpcClient *rpc.Client
transactor transactions.TransactorIface
}
func NewERC721TransferBridge(rpcClient *rpc.Client, transactor transactions.TransactorIface) *ERC721TransferBridge {
return &ERC721TransferBridge{rpcClient: rpcClient, transactor: transactor}
}
func (s *ERC721TransferBridge) Name() string {
return ERC721TransferName
}
func (s *ERC721TransferBridge) AvailableFor(params BridgeParams) (bool, error) {
return params.FromChain.ChainID == params.ToChain.ChainID && params.ToToken == nil, nil
}
func (s *ERC721TransferBridge) CalculateFees(params BridgeParams) (*big.Int, *big.Int, error) {
return big.NewInt(0), big.NewInt(0), nil
}
func (s *ERC721TransferBridge) PackTxInputData(params BridgeParams, contractType string) ([]byte, error) {
abi, err := abi.JSON(strings.NewReader(collectibles.CollectiblesMetaData.ABI))
if err != nil {
return []byte{}, err
}
id, success := big.NewInt(0).SetString(params.FromToken.Symbol, 0)
if !success {
return []byte{}, fmt.Errorf("failed to convert %s to big.Int", params.FromToken.Symbol)
}
return abi.Pack("safeTransferFrom",
params.FromAddr,
params.ToAddr,
id,
)
}
func (s *ERC721TransferBridge) EstimateGas(params BridgeParams) (uint64, error) {
ethClient, err := s.rpcClient.EthClient(params.FromChain.ChainID)
if err != nil {
return 0, err
}
value := new(big.Int)
input, err := s.PackTxInputData(params, "")
if err != nil {
return 0, err
}
msg := ethereum.CallMsg{
From: params.FromAddr,
To: ¶ms.FromToken.Address,
Value: value,
Data: input,
}
estimation, err := ethClient.EstimateGas(context.Background(), msg)
if err != nil {
return 0, err
}
increasedEstimation := float64(estimation) * IncreaseEstimatedGasFactor
return uint64(increasedEstimation), nil
}
func (s *ERC721TransferBridge) BuildTx(params BridgeParams) (*ethTypes.Transaction, error) {
contractAddress := types.Address(params.FromToken.Address)
// We store ERC721 Token ID using big.Int.String() in token.Symbol
tokenID, success := new(big.Int).SetString(params.FromToken.Symbol, 10)
if !success {
return nil, fmt.Errorf("failed to convert ERC721's Symbol %s to big.Int", params.FromToken.Symbol)
}
sendArgs := &TransactionBridge{
ERC721TransferTx: &ERC721TransferTxArgs{
SendTxArgs: transactions.SendTxArgs{
From: types.Address(params.FromAddr),
To: &contractAddress,
Value: (*hexutil.Big)(params.AmountIn),
Data: types.HexBytes("0x0"),
},
TokenID: (*hexutil.Big)(tokenID),
Recipient: params.ToAddr,
},
ChainID: params.FromChain.ChainID,
}
return s.BuildTransaction(sendArgs)
}
func (s *ERC721TransferBridge) 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 := collectibles.NewCollectibles(common.Address(*sendArgs.ERC721TransferTx.To), ethClient)
if err != nil {
return tx, err
}
nonce, err := s.transactor.NextNonce(s.rpcClient, sendArgs.ChainID, sendArgs.ERC721TransferTx.From)
if err != nil {
return tx, err
}
argNonce := hexutil.Uint64(nonce)
sendArgs.ERC721TransferTx.Nonce = &argNonce
txOpts := sendArgs.ERC721TransferTx.ToTransactOpts(signerFn)
tx, err = contract.SafeTransferFrom(txOpts, common.Address(sendArgs.ERC721TransferTx.From),
sendArgs.ERC721TransferTx.Recipient,
sendArgs.ERC721TransferTx.TokenID.ToInt())
return tx, err
}
func (s *ERC721TransferBridge) Send(sendArgs *TransactionBridge, verifiedAccount *account.SelectedExtKey) (hash types.Hash, err error) {
tx, err := s.sendOrBuild(sendArgs, getSigner(sendArgs.ChainID, sendArgs.ERC721TransferTx.From, verifiedAccount))
if err != nil {
return hash, err
}
return types.Hash(tx.Hash()), nil
}
func (s *ERC721TransferBridge) BuildTransaction(sendArgs *TransactionBridge) (*ethTypes.Transaction, error) {
return s.sendOrBuild(sendArgs, nil)
}
func (s *ERC721TransferBridge) CalculateAmountOut(params BridgeParams) (*big.Int, error) {
return params.AmountIn, nil
}
func (s *ERC721TransferBridge) GetContractAddress(params BridgeParams) (common.Address, error) {
return params.FromToken.Address, nil
}