mirror of
https://github.com/ethereum/go-ethereum.git
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adding in eras to difficulty adjustments.
This commit is contained in:
Derek May
parent
5f26883dc9
commit
e15369a119
1 changed files with 69 additions and 133 deletions
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@ -34,7 +34,15 @@ import (
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set "gopkg.in/fatih/set.v0"
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)
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// EGEM Ethash proof-of-work protocol constants.
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// Ethash proof-of-work protocol constants.
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var (
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maxUncles = 2 // Maximum number of uncles allowed in a single block
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allowedFutureBlockTime = 15 * time.Second // Max time from current time allowed for blocks, before they're considered future blocks
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FrontierBlockReward *big.Int = big.NewInt(5e+18) // Not used will be removed in furture EGEM update.
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ByzantiumBlockReward *big.Int = big.NewInt(3e+18) // Not used will be removed in furture EGEM update.
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)
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// EGEM Variables
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var (
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egem0BlockReward *big.Int = big.NewInt(8e+18) // 8 EGEM Block reward in wei for successfully mining a block.
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egem1BlockReward *big.Int = big.NewInt(4e+18) // 4 EGEM Block reward in wei for successfully mining a block.
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@ -42,14 +50,10 @@ var (
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egem0DevReward *big.Int = big.NewInt(1e+18) // Era0 Dev reward 1 EGEM per block.
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egem1DevReward *big.Int = big.NewInt(500000000000000000) // Era1 Dev reward 0.5 EGEM per block.
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egem2DevReward *big.Int = big.NewInt(100000000000000000) // Era2 Dev reward 0.1 EGEM per block.
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egemRewardSwitchBlockEra0 *big.Int = big.NewInt(5000) //5K Block era transition
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egemRewardSwitchBlockEra1 *big.Int = big.NewInt(10000000) // 10M block era transition
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egemRewardSwitchBlockEra2 *big.Int = big.NewInt(20000000) // 20M block era transtiton
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maxUncles = 2 // Maximum number of uncles allowed in a single block
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allowedFutureBlockTime = 15 * time.Second // Max time from current time allowed for blocks, before they're considered future blocks
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egemRewardSwitchBlockEra0 *big.Int = big.NewInt(5) //5K Block era transition
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egemRewardSwitchBlockEra1 *big.Int = big.NewInt(10) // 10M block era transition
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egemRewardSwitchBlockEra2 *big.Int = big.NewInt(20) // 20M block era transtiton
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devFund = common.HexToAddress("0xc393659c2918a64cdfb44d463de9c747aa4ce3f7") //r
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FrontierBlockReward *big.Int = big.NewInt(5e+18) // Not used
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ByzantiumBlockReward *big.Int = big.NewInt(3e+18) // Not used
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)
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// Various error messages to mark blocks invalid. These should be private to
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@ -323,137 +327,69 @@ var (
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big2 = big.NewInt(2)
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big9 = big.NewInt(9)
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big10 = big.NewInt(10)
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big15 = big.NewInt(15)
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big20 = big.NewInt(20)
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big50 = big.NewInt(50)
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bigMinus99 = big.NewInt(-99)
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big2999999 = big.NewInt(2999999)
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)
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// calcDifficultyByzantium is the difficulty adjustment algorithm. It returns
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// the difficulty that a new block should have when created at time given the
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// parent block's time and difficulty. The calculation uses the Byzantium rules.
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func calcDifficultyByzantium(time uint64, parent *types.Header) *big.Int {
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// https://github.com/ethereum/EIPs/issues/100.
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// algorithm:
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// diff = (parent_diff +
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// (parent_diff / 2048 * max((2 if len(parent.uncles) else 1) - ((timestamp - parent.timestamp) // 9), -99))
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// ) + 2^(periodCount - 2)
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// EGEM Era Difficulty Algo
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bigTime := new(big.Int).SetUint64(time)
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bigParentTime := new(big.Int).Set(parent.Time)
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// holds intermediate values to make the algo easier to read & audit
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x := new(big.Int)
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y := new(big.Int)
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// (2 if len(parent_uncles) else 1) - (block_timestamp - parent_timestamp) // 9
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x.Sub(bigTime, bigParentTime)
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x.Div(x, big9)
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if parent.UncleHash == types.EmptyUncleHash {
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x.Sub(big1, x)
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} else {
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x.Sub(big2, x)
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}
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// max((2 if len(parent_uncles) else 1) - (block_timestamp - parent_timestamp) // 9, -99)
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if x.Cmp(bigMinus99) < 0 {
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x.Set(bigMinus99)
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}
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// parent_diff + (parent_diff / 2048 * max((2 if len(parent.uncles) else 1) - ((timestamp - parent.timestamp) // 9), -99))
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y.Div(parent.Difficulty, params.DifficultyBoundDivisor)
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x.Mul(y, x)
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x.Add(parent.Difficulty, x)
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// minimum difficulty can ever be (before exponential factor)
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if x.Cmp(params.MinimumDifficulty) < 0 {
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x.Set(params.MinimumDifficulty)
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}
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// calculate a fake block number for the ice-age delay:
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// https://github.com/ethereum/EIPs/pull/669
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// fake_block_number = min(0, block.number - 3_000_000
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fakeBlockNumber := new(big.Int)
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if parent.Number.Cmp(big2999999) >= 0 {
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fakeBlockNumber = fakeBlockNumber.Sub(parent.Number, big2999999) // Note, parent is 1 less than the actual block number
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}
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// for the exponential factor
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periodCount := fakeBlockNumber
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periodCount.Div(periodCount, expDiffPeriod)
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// the exponential factor, commonly referred to as "the bomb"
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// diff = diff + 2^(periodCount - 2)
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if periodCount.Cmp(big1) > 0 {
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y.Sub(periodCount, big2)
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y.Exp(big2, y, nil)
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x.Add(x, y)
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}
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return x
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}
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// calcDifficultyHomestead is the difficulty adjustment algorithm. It returns
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// the difficulty that a new block should have when created at time given the
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// parent block's time and difficulty. The calculation uses the Homestead rules.
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func calcDifficultyHomestead(time uint64, parent *types.Header) *big.Int {
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// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-2.md
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// algorithm:
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// diff = (parent_diff +
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// (parent_diff / 2048 * max(1 - (block_timestamp - parent_timestamp) // 10, -99))
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// ) + 2^(periodCount - 2)
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bigTime := new(big.Int).SetUint64(time)
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bigParentTime := new(big.Int).Set(parent.Time)
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// holds intermediate values to make the algo easier to read & audit
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x := new(big.Int)
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y := new(big.Int)
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// 1 - (block_timestamp - parent_timestamp) // 10
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x.Sub(bigTime, bigParentTime)
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x.Div(x, big10)
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x.Sub(big1, x)
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// max(1 - (block_timestamp - parent_timestamp) // 10, -99)
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if x.Cmp(bigMinus99) < 0 {
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x.Set(bigMinus99)
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}
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// (parent_diff + parent_diff // 2048 * max(1 - (block_timestamp - parent_timestamp) // 10, -99))
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y.Div(parent.Difficulty, params.DifficultyBoundDivisor)
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x.Mul(y, x)
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x.Add(parent.Difficulty, x)
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// minimum difficulty can ever be (before exponential factor)
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if x.Cmp(params.MinimumDifficulty) < 0 {
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x.Set(params.MinimumDifficulty)
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}
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// for the exponential factor
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periodCount := new(big.Int).Add(parent.Number, big1)
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periodCount.Div(periodCount, expDiffPeriod)
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// the exponential factor, commonly referred to as "the bomb"
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// diff = diff + 2^(periodCount - 2)
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if periodCount.Cmp(big1) > 0 {
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y.Sub(periodCount, big2)
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y.Exp(big2, y, nil)
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x.Add(x, y)
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}
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return x
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}
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// EGEM Difficulty Algo
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func calcDifficultyEGEM(time uint64, parent *types.Header) *big.Int {
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diff := new(big.Int)
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adjust := new(big.Int).Div(parent.Difficulty, big10)
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adjust0 := new(big.Int).Div(parent.Difficulty, big10)
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adjust1 := new(big.Int).Div(parent.Difficulty, big15)
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adjust2 := new(big.Int).Div(parent.Difficulty, big20)
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adjust3 := new(big.Int).Div(parent.Difficulty, big50)
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bigTime := new(big.Int)
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bigParentTime := new(big.Int)
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bigTime.SetUint64(time)
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bigParentTime.Set(parent.Time)
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if bigTime.Sub(bigTime, bigParentTime).Cmp(params.DurationLimit) < 0 {
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diff.Add(parent.Difficulty, adjust)
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if (parent.Number.Cmp(egemRewardSwitchBlockEra2) == 1) {
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if bigTime.Sub(bigTime, bigParentTime).Cmp(params.DurationLimit) < 0 {
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diff.Add(parent.Difficulty, adjust0)
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} else {
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diff.Sub(parent.Difficulty, adjust0)
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}
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if diff.Cmp(params.MinimumDifficulty) < 0 {
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diff.Set(params.MinimumDifficulty)
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}
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return diff
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} else if (parent.Number.Cmp(egemRewardSwitchBlockEra1) == 1) {
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if bigTime.Sub(bigTime, bigParentTime).Cmp(params.DurationLimit) < 0 {
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diff.Add(parent.Difficulty, adjust1)
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} else {
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diff.Sub(parent.Difficulty, adjust1)
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}
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if diff.Cmp(params.MinimumDifficulty) < 0 {
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diff.Set(params.MinimumDifficulty)
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}
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return diff
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} else if (parent.Number.Cmp(egemRewardSwitchBlockEra0) == 1) {
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if bigTime.Sub(bigTime, bigParentTime).Cmp(params.DurationLimit) < 0 {
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diff.Add(parent.Difficulty, adjust2)
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} else {
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diff.Sub(parent.Difficulty, adjust2)
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}
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if diff.Cmp(params.MinimumDifficulty) < 0 {
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diff.Set(params.MinimumDifficulty)
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}
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return diff
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} else {
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diff.Sub(parent.Difficulty, adjust)
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if bigTime.Sub(bigTime, bigParentTime).Cmp(params.DurationLimit) < 0 {
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diff.Add(parent.Difficulty, adjust3)
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} else {
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diff.Sub(parent.Difficulty, adjust3)
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}
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if diff.Cmp(params.MinimumDifficulty) < 0 {
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diff.Set(params.MinimumDifficulty)
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}
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return diff
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}
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if diff.Cmp(params.MinimumDifficulty) < 0 {
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diff.Set(params.MinimumDifficulty)
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}
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return diff
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}
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// VerifySeal implements consensus.Engine, checking whether the given block satisfies
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@ -541,9 +477,9 @@ func accumulateRewards(config *params.ChainConfig, state *state.StateDB, header
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// Accumulate the rewards for the miner and any included uncles
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// if block.Number > 5000 dev rewards kick in 8/1.
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if (header.Number.Cmp(egemRewardSwitchBlockEra0) == 1) {
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reward := new(big.Int).Set(block0Reward)
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// if block.Number > 5000 dev rewards kick in 2/0.1.
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if (header.Number.Cmp(egemRewardSwitchBlockEra2) == 1) {
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reward := new(big.Int).Set(block2Reward)
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r := new(big.Int)
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for _, uncle := range uncles {
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r.Add(uncle.Number, big8)
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@ -557,9 +493,9 @@ func accumulateRewards(config *params.ChainConfig, state *state.StateDB, header
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state.AddBalance(header.Coinbase, reward)
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//dev rewards
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state.AddBalance(devFund, d0Reward) //ridz
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state.AddBalance(devFund, d2Reward) //ridz
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//Era2 Reward scheme Block and dev reward halving 4/0.1.
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//Era2 Reward scheme Block and dev reward halving 4/0.5.
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} else if (header.Number.Cmp(egemRewardSwitchBlockEra1) == 1) {
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reward := new(big.Int).Set(block1Reward)
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r := new(big.Int)
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@ -577,9 +513,9 @@ func accumulateRewards(config *params.ChainConfig, state *state.StateDB, header
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//dev rewards
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state.AddBalance(devFund, d1Reward) //ridz
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//Final form and final halving of block and dev rewards 2/0.001.
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} else if (header.Number.Cmp(egemRewardSwitchBlockEra2) == 1) {
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reward := new(big.Int).Set(block2Reward)
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//Final form and final halving of block and dev rewards 8/1.
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} else if (header.Number.Cmp(egemRewardSwitchBlockEra0) == 1) {
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reward := new(big.Int).Set(block0Reward)
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r := new(big.Int)
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for _, uncle := range uncles {
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r.Add(uncle.Number, big8)
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@ -593,7 +529,7 @@ func accumulateRewards(config *params.ChainConfig, state *state.StateDB, header
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state.AddBalance(header.Coinbase, reward)
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//dev rewards
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state.AddBalance(devFund, d2Reward) //ridz
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state.AddBalance(devFund, d0Reward) //ridz
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// Fair Launch upto block 5000 then dev fee system kicks in.
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} else {
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