ethash

package
v0.0.0-...-acc7c72 Latest Latest
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 Go to latest Published: May 8, 2020 License: GPL-3.0 Imports: 23 Imported by: 0

Documentation

Overview

Package ethash implements the ethash proof-of-work consensus engine.

Index

Constants

View Source 
const (
	TesterThreads = 1

	PowTargetSpacing       = 15
	DifficultyAdjustCycles = 1 // how many cycles to adjust
	MinDifficulty          = 131072
)

Variables

View Source 
var (
	PulsarBlockReward    *big.Int = new(big.Int).Mul(big.NewInt(128), big.NewInt(1e18)) // Block reward in wei for successfully mining a block
	FrontierBlockReward  *big.Int = PulsarBlockReward                                   // Block reward in wei for successfully mining a block
	ByzantiumBlockReward *big.Int = PulsarBlockReward                                   // Block reward in wei for successfully mining a block upward from Byzantium

	//InterestRate           *big.Int = big.NewInt(100)
	//InterestRatePrecision  *big.Int = big.NewInt(10000000000)
	FeeRatioPrecision *big.Int = big.NewInt(1000000)

	PosSupplyLimit          *big.Int = new(big.Int).Mul(new(big.Int).SetUint64(128*core.FixedHalveInterval(halveIntervalGoal)*2), big.NewInt(1e18)) // The PosSupplyLimit is equal to PowSupplyLimit
	PosSupplyN              *big.Int = new(big.Int).SetUint64(core.FixedHalveInterval(halveIntervalGoal) * 10)                                      // doubled after about 20 years, so 5% every year
	PowRewardRatioUncles    *big.Int = big.NewInt(3000)
	PowRewardRatioPrecision *big.Int = big.NewInt(10000)
)

Ethash proof-of-work protocol constants.

View Source 
var ErrInvalidDumpMagic = errors.New("invalid dump magic")

Functions

func CurPowReward 

func CurPowReward(baseReward *big.Int, blockNumber uint64) *big.Int

func GHash 

func GHash(data []byte) []byte

func IsInBlocks 

func IsInBlocks(hash common.Hash, blocks []*types.Block) bool

func IsInPreEpoch 

func IsInPreEpoch(hash common.Hash, ancestors []*types.Block) bool

func IsTopoPrepared 

func IsTopoPrepared(block *types.Block, ancestors []*types.Block, refBlocks []*types.Block) bool

Types

type Config 

type Config struct {
	PowMode Mode
}

Config are the configuration parameters of the ethash.

type Ethash 

type Ethash struct {
	// contains filtered or unexported fields
}

Ethash is a consensus engine based on proof-of-work implementing the ethash algorithm.

func New 

func New(config Config) *Ethash

New creates a full sized ethash PoW scheme.

func NewFakeDelayer 

func NewFakeDelayer(delay time.Duration) *Ethash

NewFakeDelayer creates a ethash consensus engine with a fake PoW scheme that accepts all blocks as valid, but delays verifications by some time, though they still have to conform to the Ethereum consensus rules.

func NewFakeFailer 

func NewFakeFailer(fail uint64) *Ethash

NewFakeFailer creates a ethash consensus engine with a fake PoW scheme that accepts all blocks as valid apart from the single one specified, though they still have to conform to the Ethereum consensus rules.

func NewFaker 

func NewFaker() *Ethash

NewFaker creates a ethash consensus engine with a fake PoW scheme that accepts all blocks' seal as valid, though they still have to conform to the Ethereum consensus rules.

func NewFullFaker 

func NewFullFaker() *Ethash

NewFullFaker creates an ethash consensus engine with a full fake scheme that accepts all blocks as valid, without checking any consensus rules whatsoever.

func NewShared 

func NewShared() *Ethash

NewShared creates a full sized ethash PoW shared between all requesters running in the same process.

func NewTester 

func NewTester() *Ethash

NewTester creates a small sized ethash PoW scheme useful only for testing purposes.

func (*Ethash) APIs 

func (ethash *Ethash) APIs(chain consensus.BlockReader) []rpc.API

APIs implements consensus.Engine, returning the user facing RPC APIs. Currently that is empty.

func (*Ethash) Author 

func (ethash *Ethash) Author(header *types.Header) (common.Address, error)

Author implements consensus.Engine, returning the header's coinbase as the proof-of-work verified author of the block.

func (*Ethash) CalcDifficulty 

func (ethash *Ethash) CalcDifficulty(chain consensus.BlockReader, time uint64, parent *types.Header, headers []*types.Header) *big.Int

func (*Ethash) CalcLastCyclePosSupply 

func (ethash *Ethash) CalcLastCyclePosSupply(chain consensus.BlockReader, header *types.Header, parent *types.Header, headers []*types.Header) *big.Int

func (*Ethash) CalcLastCyclePowSupply 

func (ethash *Ethash) CalcLastCyclePowSupply(chain consensus.BlockReader, header *types.Header, parent *types.Header, headers []*types.Header) *big.Int

func (*Ethash) CalcTarget 

func (ethash *Ethash) CalcTarget(chain consensus.BlockReader, header *types.Header, headers []*types.Header) *big.Int

calculate the pos target.

func (*Ethash) CheckSupplies 

func (ethash *Ethash) CheckSupplies(chain consensus.BlockReader, header *types.Header, parent *types.Header, headers []*types.Header) bool

sanity check the supplies in this header

func (*Ethash) Finalize 

func (ethash *Ethash) Finalize(chain consensus.BlockReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error)

Finalize implements consensus.Engine, accumulating the block and uncle rewards, setting the final state and assembling the block.

func (*Ethash) FindInHeaders 

func (ethash *Ethash) FindInHeaders(header *types.Header, headers []*types.Header) bool

func (*Ethash) FindInHeadersByNum 

func (ethash *Ethash) FindInHeadersByNum(blockNum uint64, buf []*types.Header) *types.Header

func (*Ethash) GetPosMatureTotalSupply 

func (ethash *Ethash) GetPosMatureTotalSupply(chain consensus.BlockReader, header *types.Header, headers []*types.Header) *big.Int

returns the total supply of pos in all previous mature cycles.

func (*Ethash) GetPowMatureTotalSupply 

func (ethash *Ethash) GetPowMatureTotalSupply(chain consensus.BlockReader, header *types.Header, headers []*types.Header) *big.Int

returns the total supply of pow in all previous mature cycles.

func (*Ethash) HashimotoforHeader 

func (ethash *Ethash) HashimotoforHeader(hash []byte, nonce uint64) []byte

func (*Ethash) Hashrate 

func (ethash *Ethash) Hashrate() float64

Hashrate implements PoW, returning the measured rate of the search invocations per second over the last minute.

func (*Ethash) PosWeight 

func (ethash *Ethash) PosWeight(chain consensus.BlockReader, header *types.Header, parent *types.Header, headers []*types.Header) uint32

returns the pos weight in a certain cycle.

func (*Ethash) Prepare 

func (ethash *Ethash) Prepare(chain consensus.BlockReader, header *types.Header) error

Prepare implements consensus.Engine, initializing the difficulty field of a header to conform to the ethash protocol. The changes are done inline.

func (*Ethash) Seal 

func (ethash *Ethash) Seal(chain consensus.BlockReader, block *types.Block, stop <-chan struct{}) (*types.Block, error)

Seal implements consensus.Engine, attempting to find a nonce that satisfies the block's difficulty requirements.

func (*Ethash) SetThreads 

func (ethash *Ethash) SetThreads(threads int)

SetThreads updates the number of mining threads currently enabled. Calling this method does not start mining, only sets the thread count. If zero is specified, the miner will use all cores of the machine. Setting a thread count below zero is allowed and will cause the miner to idle, without any work being done.

func (*Ethash) Threads 

func (ethash *Ethash) Threads() int

Threads returns the number of mining threads currently enabled. This doesn't necessarily mean that mining is running!

func (*Ethash) UpdateSupplies 

func (ethash *Ethash) UpdateSupplies(chain consensus.BlockReader, header *types.Header, parent *types.Header, headers []*types.Header)

update the supplies

func (*Ethash) VerifyHeader 

func (ethash *Ethash) VerifyHeader(chain consensus.BlockReader, header *types.Header, seal bool, headers []*types.Header) error

VerifyHeader checks whether a header conforms to the consensus rules of the stock Ethereum ethash engine.

func (*Ethash) VerifyHeaders 

func (ethash *Ethash) VerifyHeaders(chain consensus.BlockReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error)

VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers concurrently. The method returns a quit channel to abort the operations and a results channel to retrieve the async verifications.

func (*Ethash) VerifySeal 

func (ethash *Ethash) VerifySeal(chain consensus.BlockReader, header *types.Header, headers []*types.Header) error

func (*Ethash) VerifyUncles 

func (ethash *Ethash) VerifyUncles(chain consensus.BlockReader, block *types.Block) error

VerifyUncles verifies that the given block's uncles conform to the consensus rules of the stock Ethereum ethash engine.

type Mode 

type Mode uint

Mode defines the type and amount of PoW verification an ethash engine makes. 

const (
	ModeNormal Mode = iota
	ModeShared
	ModeTest
	ModeFake
	ModeFullFake
)

Source Files

View all Source files

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