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block_rewards.go
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/
block_rewards.go
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// VulcanizeDB
// Copyright © 2019 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 <http://www.gnu.org/licenses/>.
package common
import (
"math/big"
"github.com/ethereum/go-ethereum/core/types"
"github.com/vulcanize/vulcanizedb/pkg/core"
)
func CalcBlockReward(block core.Block, uncles []*types.Header) *big.Int {
staticBlockReward := staticRewardByBlockNumber(block.Number)
transactionFees := calcTransactionFees(block)
uncleInclusionRewards := calcUncleInclusionRewards(block, uncles)
tmp := transactionFees.Add(transactionFees, uncleInclusionRewards)
return tmp.Add(tmp, staticBlockReward)
}
func calcUncleMinerReward(blockNumber, uncleBlockNumber int64) *big.Int {
staticBlockReward := staticRewardByBlockNumber(blockNumber)
rewardDiv8 := staticBlockReward.Div(staticBlockReward, big.NewInt(8))
mainBlock := big.NewInt(blockNumber)
uncleBlock := big.NewInt(uncleBlockNumber)
uncleBlockPlus8 := uncleBlock.Add(uncleBlock, big.NewInt(8))
uncleBlockPlus8MinusMainBlock := uncleBlockPlus8.Sub(uncleBlockPlus8, mainBlock)
return rewardDiv8.Mul(rewardDiv8, uncleBlockPlus8MinusMainBlock)
}
func calcTransactionFees(block core.Block) *big.Int {
transactionFees := new(big.Int)
for _, transaction := range block.Transactions {
receipt := transaction.Receipt
gasPrice := big.NewInt(transaction.GasPrice)
gasUsed := big.NewInt(int64(receipt.GasUsed))
transactionFee := gasPrice.Mul(gasPrice, gasUsed)
transactionFees = transactionFees.Add(transactionFees, transactionFee)
}
return transactionFees
}
func calcUncleInclusionRewards(block core.Block, uncles []*types.Header) *big.Int {
uncleInclusionRewards := new(big.Int)
for range uncles {
staticBlockReward := staticRewardByBlockNumber(block.Number)
staticBlockReward.Div(staticBlockReward, big.NewInt(32))
uncleInclusionRewards.Add(uncleInclusionRewards, staticBlockReward)
}
return uncleInclusionRewards
}
func staticRewardByBlockNumber(blockNumber int64) *big.Int {
staticBlockReward := new(big.Int)
//https://blog.ethereum.org/2017/10/12/byzantium-hf-announcement/
if blockNumber >= 7280000 {
staticBlockReward.SetString("2000000000000000000", 10)
} else if blockNumber >= 4370000 {
staticBlockReward.SetString("3000000000000000000", 10)
} else {
staticBlockReward.SetString("5000000000000000000", 10)
}
return staticBlockReward
}