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consensus/ethash, params: implement eip-2384: bump difficulty bomb #20347

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merged 8 commits into from
Dec 6, 2019
Merged

consensus/ethash, params: implement eip-2384: bump difficulty bomb #20347

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b039981
consensus/ethash, params: implement eip-2384: bump difficulty bomb
holiman Nov 21, 2019
cdeba14
params: EIP 2384 compat checks
holiman Nov 21, 2019
a966a37
consensus, params: add Muir Glacier block number (mainnet,ropsten) + …
holiman Dec 2, 2019
da43f2c
core/forkid: forkid tests for muir glacier
holiman Dec 5, 2019
de424f3
params/config: address review concerns
holiman Dec 5, 2019
51172f0
params, core/forkid: review nitpicks
holiman Dec 5, 2019
ae43a47
cmd/geth,eth,les: add override option for muir glacier
holiman Dec 6, 2019
b726125
params: nit fix
karalabe Dec 6, 2019
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8 changes: 8 additions & 0 deletions consensus/ethash/consensus.go
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,12 @@ var (
maxUncles = 2 // Maximum number of uncles allowed in a single block
allowedFutureBlockTime = 15 * time.Second // Max time from current time allowed for blocks, before they're considered future blocks

// calcDifficultyEip2384 is the difficulty adjustment algorithm as specified by EIP 2384.
// It offsets the bomb 4M blocks from Constantinople, so in total 9M blocks.
// Specification EIP-2384 :https://github.com/ethereum/EIPs/pull/2384
// TODO: change link once it's merged
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calcDifficultyEip2384 = makeDifficultyCalculator(big.NewInt(9000000))

// calcDifficultyConstantinople is the difficulty adjustment algorithm for Constantinople.
// It returns the difficulty that a new block should have when created at time given the
// parent block's time and difficulty. The calculation uses the Byzantium rules, but with
Expand Down Expand Up @@ -311,6 +317,8 @@ func (ethash *Ethash) CalcDifficulty(chain consensus.ChainReader, time uint64, p
func CalcDifficulty(config *params.ChainConfig, time uint64, parent *types.Header) *big.Int {
next := new(big.Int).Add(parent.Number, big1)
switch {
case config.IsEip2384(next):
return calcDifficultyEip2384(time, parent)
case config.IsConstantinople(next):
return calcDifficultyConstantinople(time, parent)
case config.IsByzantium(next):
Expand Down
18 changes: 14 additions & 4 deletions params/config.go
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Expand Up @@ -213,16 +213,16 @@ var (
//
// This configuration is intentionally not using keyed fields to force anyone
// adding flags to the config to also have to set these fields.
AllEthashProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, new(EthashConfig), nil}
AllEthashProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, new(EthashConfig), nil}

// AllCliqueProtocolChanges contains every protocol change (EIPs) introduced
// and accepted by the Ethereum core developers into the Clique consensus.
//
// This configuration is intentionally not using keyed fields to force anyone
// adding flags to the config to also have to set these fields.
AllCliqueProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, &CliqueConfig{Period: 0, Epoch: 30000}}
AllCliqueProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, nil, &CliqueConfig{Period: 0, Epoch: 30000}}

TestChainConfig = &ChainConfig{big.NewInt(1), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, new(EthashConfig), nil}
TestChainConfig = &ChainConfig{big.NewInt(1), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, new(EthashConfig), nil}
TestRules = TestChainConfig.Rules(new(big.Int))
)

Expand Down Expand Up @@ -292,6 +292,7 @@ type ChainConfig struct {
ConstantinopleBlock *big.Int `json:"constantinopleBlock,omitempty"` // Constantinople switch block (nil = no fork, 0 = already activated)
PetersburgBlock *big.Int `json:"petersburgBlock,omitempty"` // Petersburg switch block (nil = same as Constantinople)
IstanbulBlock *big.Int `json:"istanbulBlock,omitempty"` // Istanbul switch block (nil = no fork, 0 = already on istanbul)
EIP2384Block *big.Int `json:"eip2384Block,omitempty"` // Eip-2384 (bomb delay) switch block (nil = no fork, 0 = already activated)
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EWASMBlock *big.Int `json:"ewasmBlock,omitempty"` // EWASM switch block (nil = no fork, 0 = already activated)

// Various consensus engines
Expand Down Expand Up @@ -329,7 +330,7 @@ func (c *ChainConfig) String() string {
default:
engine = "unknown"
}
return fmt.Sprintf("{ChainID: %v Homestead: %v DAO: %v DAOSupport: %v EIP150: %v EIP155: %v EIP158: %v Byzantium: %v Constantinople: %v Petersburg: %v Istanbul: %v Engine: %v}",
return fmt.Sprintf("{ChainID: %v Homestead: %v DAO: %v DAOSupport: %v EIP150: %v EIP155: %v EIP158: %v Byzantium: %v Constantinople: %v Petersburg: %v Istanbul: %v, EIP-2384: %v, Engine: %v}",
c.ChainID,
c.HomesteadBlock,
c.DAOForkBlock,
Expand All @@ -341,6 +342,7 @@ func (c *ChainConfig) String() string {
c.ConstantinopleBlock,
c.PetersburgBlock,
c.IstanbulBlock,
c.EIP2384Block,
engine,
)
}
Expand Down Expand Up @@ -380,6 +382,10 @@ func (c *ChainConfig) IsConstantinople(num *big.Int) bool {
return isForked(c.ConstantinopleBlock, num)
}

func (c *ChainConfig) IsEip2384(num *big.Int) bool {
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return isForked(c.EIP2384Block, num)
}

// IsPetersburg returns whether num is either
// - equal to or greater than the PetersburgBlock fork block,
// - OR is nil, and Constantinople is active
Expand Down Expand Up @@ -432,6 +438,7 @@ func (c *ChainConfig) CheckConfigForkOrder() error {
{"constantinopleBlock", c.ConstantinopleBlock},
{"petersburgBlock", c.PetersburgBlock},
{"istanbulBlock", c.IstanbulBlock},
{"eip2384Block", c.EIP2384Block},
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Please fix name, both sides actually.

} {
if lastFork.name != "" {
// Next one must be higher number
Expand Down Expand Up @@ -485,6 +492,9 @@ func (c *ChainConfig) checkCompatible(newcfg *ChainConfig, head *big.Int) *Confi
if isForkIncompatible(c.IstanbulBlock, newcfg.IstanbulBlock, head) {
return newCompatError("Istanbul fork block", c.IstanbulBlock, newcfg.IstanbulBlock)
}
if isForkIncompatible(c.EIP2384Block, newcfg.EIP2384Block, head) {
return newCompatError("EIP-2348 fork block", c.EIP2384Block, newcfg.EIP2384Block)
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Please change the error message to Muir Glacier

}
if isForkIncompatible(c.EWASMBlock, newcfg.EWASMBlock, head) {
return newCompatError("ewasm fork block", c.EWASMBlock, newcfg.EWASMBlock)
}
Expand Down