87 lines
2.8 KiB
Go
87 lines
2.8 KiB
Go
// VulcanizeDB
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// Copyright © 2020 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package tx_spammer
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import (
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"fmt"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/rlp"
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)
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// TxGenerator generates and signs txs
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type TxGenerator struct {
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// keep track of account nonces locally so we aren't spamming to determine the nonce
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// this assumes these accounts are not sending txs outside this process
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nonces map[common.Address]uint64
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}
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// NewTxGenerator creates a new tx generator
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func NewTxGenerator(params []TxParams) *TxGenerator {
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nonces := make(map[common.Address]uint64)
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for _, p := range params {
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nonces[p.Sender] = p.StartingNonce
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}
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return &TxGenerator{
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nonces: nonces,
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}
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}
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// GenerateTx generates tx from the provided params
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func (tg TxGenerator) GenerateTx(params TxParams) ([]byte, error) {
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tx := make([]byte, 0)
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switch params.Type {
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case Standard, OptimismL1ToL2, OptimismL2:
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return tg.gen(params)
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case EIP1559:
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return tg.gen1559(params)
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default:
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return nil, fmt.Errorf("unsupported tx type: %s", params.Type.String())
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}
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return tx, nil
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}
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func (gen TxGenerator) gen(params TxParams) ([]byte, error) {
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nonce := gen.nonces[params.Sender]
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tx := new(types.Transaction)
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if params.To == nil {
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tx = types.NewContractCreation(nonce, params.Amount, params.GasLimit, params.GasPrice, params.Data, params.L1SenderAddr, params.L1RollupTxId, params.QueueOrigin)
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} else {
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tx = types.NewTransaction(nonce, *params.To, params.Amount, params.GasLimit, params.GasPrice, params.Data, params.L1SenderAddr, params.L1RollupTxId, params.QueueOrigin, params.SigHashType)
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}
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signer, err := TxSigner(params.Type, params.ChainID)
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if err != nil {
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return nil, err
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}
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signedTx, err := types.SignTx(tx, signer, params.SenderKey)
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if err != nil {
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return nil, err
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}
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txRlp, err := rlp.EncodeToBytes(signedTx)
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if err != nil {
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return nil, err
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}
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gen.nonces[params.Sender]++
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return txRlp, nil
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}
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func (gen TxGenerator) gen1559(params TxParams) ([]byte, error) {
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// TODO: support EIP1559; new to make a new major version, vendor it, or release with different pkg name so that we can import both optimism and eip1559 geth
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return nil, fmt.Errorf("1559 support not yet available")
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}
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