// VulcanizeDB // Copyright © 2020 Vulcanize // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU Affero General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Affero General Public License for more details. // You should have received a copy of the GNU Affero General Public License // along with this program. If not, see . package manual import ( "errors" "fmt" "sync/atomic" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/core/types" "github.com/ethereum/go-ethereum/rlp" "github.com/vulcanize/tx_spammer/pkg/shared" ) // TxGenerator generates and signs txs type TxGenerator struct { // keep track of account nonces locally so we aren't spamming to determine the nonce // this assumes these accounts are not sending txs outside this process nonces map[common.Address]*uint64 } // NewTxGenerator creates a new tx generator func NewTxGenerator(params []TxParams) *TxGenerator { nonces := make(map[common.Address]*uint64) for _, p := range params { nonces[p.Sender] = &p.StartingNonce } return &TxGenerator{ nonces: nonces, } } // GenerateTx generates tx from the provided params func (tg TxGenerator) GenerateTx(params TxParams) ([]byte, error) { tx := make([]byte, 0) switch params.Type { case shared.OptimismL2: return tg.genL2(params) case shared.Standard: return tg.gen(params) case shared.EIP1559: return tg.gen1559(params) default: return nil, fmt.Errorf("unsupported tx type: %s", params.Type.String()) } return tx, nil } func (gen TxGenerator) genL2(params TxParams) ([]byte, error) { nonce := atomic.AddUint64(gen.nonces[params.Sender], 1) tx := new(types.Transaction) if params.To == nil { tx = types.NewContractCreation(nonce, params.Amount, params.GasLimit, params.GasPrice, params.Data, params.L1SenderAddr, params.L1RollupTxId, params.QueueOrigin) if err := shared.WriteContractAddr(params.ContractAddrWritePath, params.Sender, nonce); err != nil { return nil, err } } else { tx = types.NewTransaction(nonce, *params.To, params.Amount, params.GasLimit, params.GasPrice, params.Data, params.L1SenderAddr, params.L1RollupTxId, params.QueueOrigin, params.SigHashType) } signer, err := shared.TxSigner(shared.OptimismL2, params.ChainID) if err != nil { return nil, err } signedTx, err := types.SignTx(tx, signer, params.SenderKey) if err != nil { return nil, err } txRlp, err := rlp.EncodeToBytes(signedTx) if err != nil { return nil, err } return txRlp, nil } func (gen TxGenerator) gen(params TxParams) ([]byte, error) { // TODO: support standard geth return nil, errors.New("L1 support not yet available") } func (gen TxGenerator) gen1559(params TxParams) ([]byte, error) { // TODO: support EIP1559 return nil, errors.New("1559 support not yet available") }