mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2025-01-07 03:22:18 +00:00
6588bca40b
types.NewMessage now expects maxFeePerDataGas param, which will be used in transaction verification (preCheck). GetPayloadV3 method added to EngineAPI. Some cosmetic changes applied.
85 lines
2.8 KiB
Go
85 lines
2.8 KiB
Go
// Copyright 2021 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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//
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// The go-ethereum library 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package misc
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import (
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"fmt"
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"math/big"
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"github.com/ledgerwatch/erigon-lib/chain"
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"github.com/ledgerwatch/erigon/core/types"
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"github.com/ledgerwatch/erigon/params"
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)
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// CalcExcessDataGas implements calc_excess_data_gas from EIP-4844
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func CalcExcessDataGas(parentExcessDataGas *big.Int, newBlobs int) *big.Int {
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excessDataGas := new(big.Int)
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if parentExcessDataGas != nil {
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excessDataGas.Set(parentExcessDataGas)
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}
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consumedGas := big.NewInt(params.DataGasPerBlob)
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consumedGas.Mul(consumedGas, big.NewInt(int64(newBlobs)))
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excessDataGas.Add(excessDataGas, consumedGas)
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targetGas := big.NewInt(params.TargetDataGasPerBlock)
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if excessDataGas.Cmp(targetGas) < 0 {
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return new(big.Int)
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}
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return new(big.Int).Set(excessDataGas.Sub(excessDataGas, targetGas))
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}
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// FakeExponential approximates factor * e ** (num / denom) using a taylor expansion
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// as described in the EIP-4844 spec.
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func FakeExponential(factor, num, denom *big.Int) *big.Int {
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output := new(big.Int)
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numAccum := new(big.Int).Mul(factor, denom)
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for i := 1; numAccum.Sign() > 0; i++ {
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output.Add(output, numAccum)
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numAccum.Mul(numAccum, num)
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iBig := big.NewInt(int64(i))
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numAccum.Div(numAccum, iBig.Mul(iBig, denom))
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}
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return output.Div(output, denom)
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}
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// CountBlobs returns the number of blob transactions in txs
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func CountBlobs(txs []types.Transaction) int {
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var count int
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for _, tx := range txs {
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count += len(tx.GetDataHashes())
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}
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return count
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}
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// VerifyEip4844Header verifies that the header is not malformed
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func VerifyEip4844Header(config *chain.Config, parent, header *types.Header) error {
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if header.ExcessDataGas == nil {
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return fmt.Errorf("header is missing excessDataGas")
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}
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return nil
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}
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// GetDataGasPrice implements get_data_gas_price from EIP-4844
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func GetDataGasPrice(excessDataGas *big.Int) *big.Int {
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return FakeExponential(big.NewInt(params.MinDataGasPrice), excessDataGas, big.NewInt(params.DataGasPriceUpdateFraction))
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}
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func GetDataGasUsed(numBlobs int) uint64 {
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return uint64(numBlobs) * params.DataGasPerBlob
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}
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