package backend import ( "bytes" "encoding/json" "errors" "fmt" "math/big" sdk "github.com/cosmos/cosmos-sdk/types" authtypes "github.com/cosmos/cosmos-sdk/x/auth/types" "github.com/ethereum/go-ethereum/common" ethtypes "github.com/ethereum/go-ethereum/core/types" abci "github.com/tendermint/tendermint/abci/types" "github.com/tendermint/tendermint/libs/log" "github.com/ethereum/go-ethereum/common/hexutil" "github.com/tharsis/ethermint/rpc/ethereum/types" evmtypes "github.com/tharsis/ethermint/x/evm/types" ) // SetTxDefaults populates tx message with default values in case they are not // provided on the args func (e *EVMBackend) SetTxDefaults(args evmtypes.TransactionArgs) (evmtypes.TransactionArgs, error) { if args.GasPrice != nil && (args.MaxFeePerGas != nil || args.MaxPriorityFeePerGas != nil) { return args, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified") } head := e.CurrentHeader() if head == nil { return args, errors.New("latest header is nil") } cfg := e.ChainConfig() // If user specifies both maxPriorityfee and maxFee, then we do not // need to consult the chain for defaults. It's definitely a London tx. if args.MaxPriorityFeePerGas == nil || args.MaxFeePerGas == nil { // In this clause, user left some fields unspecified. if cfg.IsLondon(head.Number) && args.GasPrice == nil { if args.MaxPriorityFeePerGas == nil { tip, err := e.SuggestGasTipCap() if err != nil { return args, err } args.MaxPriorityFeePerGas = (*hexutil.Big)(tip) } if args.MaxFeePerGas == nil { gasFeeCap := new(big.Int).Add( (*big.Int)(args.MaxPriorityFeePerGas), new(big.Int).Mul(head.BaseFee, big.NewInt(2)), ) args.MaxFeePerGas = (*hexutil.Big)(gasFeeCap) } if args.MaxFeePerGas.ToInt().Cmp(args.MaxPriorityFeePerGas.ToInt()) < 0 { return args, fmt.Errorf("maxFeePerGas (%v) < maxPriorityFeePerGas (%v)", args.MaxFeePerGas, args.MaxPriorityFeePerGas) } } else { if args.MaxFeePerGas != nil || args.MaxPriorityFeePerGas != nil { return args, errors.New("maxFeePerGas or maxPriorityFeePerGas specified but london is not active yet") } if args.GasPrice == nil { price, err := e.SuggestGasTipCap() if err != nil { return args, err } if cfg.IsLondon(head.Number) { // The legacy tx gas price suggestion should not add 2x base fee // because all fees are consumed, so it would result in a spiral // upwards. price.Add(price, head.BaseFee) } args.GasPrice = (*hexutil.Big)(price) } } } else { // Both maxPriorityfee and maxFee set by caller. Sanity-check their internal relation if args.MaxFeePerGas.ToInt().Cmp(args.MaxPriorityFeePerGas.ToInt()) < 0 { return args, fmt.Errorf("maxFeePerGas (%v) < maxPriorityFeePerGas (%v)", args.MaxFeePerGas, args.MaxPriorityFeePerGas) } } if args.Value == nil { args.Value = new(hexutil.Big) } if args.Nonce == nil { // get the nonce from the account retriever // ignore error in case tge account doesn't exist yet nonce, _ := e.getAccountNonce(*args.From, true, 0, e.logger) args.Nonce = (*hexutil.Uint64)(&nonce) } if args.Data != nil && args.Input != nil && !bytes.Equal(*args.Data, *args.Input) { return args, errors.New("both 'data' and 'input' are set and not equal. Please use 'input' to pass transaction call data") } if args.To == nil { // Contract creation var input []byte if args.Data != nil { input = *args.Data } else if args.Input != nil { input = *args.Input } if len(input) == 0 { return args, errors.New("contract creation without any data provided") } } if args.Gas == nil { // For backwards-compatibility reason, we try both input and data // but input is preferred. input := args.Input if input == nil { input = args.Data } callArgs := evmtypes.TransactionArgs{ From: args.From, To: args.To, Gas: args.Gas, GasPrice: args.GasPrice, MaxFeePerGas: args.MaxFeePerGas, MaxPriorityFeePerGas: args.MaxPriorityFeePerGas, Value: args.Value, Data: input, AccessList: args.AccessList, } blockNr := types.NewBlockNumber(big.NewInt(0)) estimated, err := e.EstimateGas(callArgs, &blockNr) if err != nil { return args, err } args.Gas = &estimated e.logger.Debug("estimate gas usage automatically", "gas", args.Gas) } if args.ChainID == nil { args.ChainID = (*hexutil.Big)(e.chainID) } return args, nil } // getAccountNonce returns the account nonce for the given account address. // If the pending value is true, it will iterate over the mempool (pending) // txs in order to compute and return the pending tx sequence. // Todo: include the ability to specify a blockNumber func (e *EVMBackend) getAccountNonce(accAddr common.Address, pending bool, height int64, logger log.Logger) (uint64, error) { queryClient := authtypes.NewQueryClient(e.clientCtx) res, err := queryClient.Account(types.ContextWithHeight(height), &authtypes.QueryAccountRequest{Address: sdk.AccAddress(accAddr.Bytes()).String()}) if err != nil { return 0, err } var acc authtypes.AccountI if err := e.clientCtx.InterfaceRegistry.UnpackAny(res.Account, &acc); err != nil { return 0, err } nonce := acc.GetSequence() if !pending { return nonce, nil } // the account retriever doesn't include the uncommitted transactions on the nonce so we need to // to manually add them. pendingTxs, err := e.PendingTransactions() if err != nil { logger.Error("failed to fetch pending transactions", "error", err.Error()) return nonce, nil } // add the uncommitted txs to the nonce counter // only supports `MsgEthereumTx` style tx for _, tx := range pendingTxs { for _, msg := range (*tx).GetMsgs() { ethMsg, ok := msg.(*evmtypes.MsgEthereumTx) if !ok { // not ethereum tx break } sender, err := ethMsg.GetSender(e.chainID) if err != nil { continue } if sender == accAddr { nonce++ } } } return nonce, nil } // AllTxLogsFromEvents parses all ethereum logs from cosmos events func AllTxLogsFromEvents(events []abci.Event) ([][]*ethtypes.Log, error) { allLogs := make([][]*ethtypes.Log, 0, 4) for _, event := range events { if event.Type != evmtypes.EventTypeTxLog { continue } logs, err := ParseTxLogsFromEvent(event) if err != nil { return nil, err } allLogs = append(allLogs, logs) } return allLogs, nil } // TxLogsFromEvents parses ethereum logs from cosmos events for specific msg index func TxLogsFromEvents(events []abci.Event, msgIndex int) ([]*ethtypes.Log, error) { for _, event := range events { if event.Type != evmtypes.EventTypeTxLog { continue } if msgIndex > 0 { // not the eth tx we want msgIndex-- continue } return ParseTxLogsFromEvent(event) } return nil, fmt.Errorf("eth tx logs not found for message index %d", msgIndex) } // ParseTxLogsFromEvent parse tx logs from one event func ParseTxLogsFromEvent(event abci.Event) ([]*ethtypes.Log, error) { logs := make([]*evmtypes.Log, 0, len(event.Attributes)) for _, attr := range event.Attributes { if !bytes.Equal(attr.Key, []byte(evmtypes.AttributeKeyTxLog)) { continue } var log evmtypes.Log if err := json.Unmarshal(attr.Value, &log); err != nil { return nil, err } logs = append(logs, &log) } return evmtypes.LogsToEthereum(logs), nil }