ethash

Documentation

Overview

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

Index

• Variables
• func CalcDifficulty(config *params.ChainConfig, time uint64, parent *types.Header) *big.Int
• func CalcDifficultyFrontierU256(time uint64, parent *types.Header) *big.Int
• func CalcDifficultyHomesteadU256(time uint64, parent *types.Header) *big.Int
• func MakeDifficultyCalculatorU256(bombDelay *big.Int) func(time uint64, parent *types.Header) *big.Int
• type Ethash
  • func NewFakeDelayer(delay time.Duration) *Ethash
  • func NewFakeFailer(fail uint64) *Ethash
  • func NewFaker() *Ethash
  • func NewFullFaker() *Ethash
  • func (ethash *Ethash) APIs(chain consensus.ChainHeaderReader) []rpc.API
  • func (ethash *Ethash) Author(header *types.Header) (common.Address, error)
  • func (ethash *Ethash) CalcDifficulty(chain consensus.ChainHeaderReader, time uint64, parent *types.Header) *big.Int
  • func (ethash *Ethash) Close() error
  • func (ethash *Ethash) Finalize(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, ...)
  • func (ethash *Ethash) FinalizeAndAssemble(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, ...) (*types.Block, error)
  • func (ethash *Ethash) Prepare(chain consensus.ChainHeaderReader, header *types.Header) error
  • func (ethash *Ethash) Seal(chain consensus.ChainHeaderReader, block *types.Block, ...) error
  • func (ethash *Ethash) SealHash(header *types.Header) (hash common.Hash)
  • func (ethash *Ethash) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header) error
  • func (ethash *Ethash) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header) (chan<- struct{}, <-chan error)
  • func (ethash *Ethash) VerifyUncles(chain consensus.ChainReader, block *types.Block) error

Variables

var (
	FrontierBlockReward       = uint256.NewInt(5e+18) // Block reward in wei for successfully mining a block
	ByzantiumBlockReward      = uint256.NewInt(3e+18) // Block reward in wei for successfully mining a block upward from Byzantium
	ConstantinopleBlockReward = uint256.NewInt(2e+18) // Block reward in wei for successfully mining a block upward from Constantinople

)

Ethash proof-of-work protocol constants.

var DynamicDifficultyCalculator = makeDifficultyCalculator

var FrontierDifficultyCalculator = calcDifficultyFrontier

Exported for fuzzing

var HomesteadDifficultyCalculator = calcDifficultyHomestead

Functions

func CalcDifficulty

func CalcDifficulty(config *params.ChainConfig, time uint64, parent *types.Header) *big.Int

CalcDifficulty is the difficulty adjustment algorithm. It returns the difficulty that a new block should have when created at time given the parent block's time and difficulty.

func CalcDifficultyFrontierU256

func CalcDifficultyFrontierU256(time uint64, parent *types.Header) *big.Int

CalcDifficultyFrontierU256 is the difficulty adjustment algorithm. 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 Frontier rules.

func CalcDifficultyHomesteadU256

func CalcDifficultyHomesteadU256(time uint64, parent *types.Header) *big.Int

CalcDifficultyHomesteadU256 is the difficulty adjustment algorithm. 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 Homestead rules.

func MakeDifficultyCalculatorU256

func MakeDifficultyCalculatorU256(bombDelay *big.Int) func(time uint64, parent *types.Header) *big.Int

MakeDifficultyCalculatorU256 creates a difficultyCalculator with the given bomb-delay. the difficulty is calculated with Byzantium rules, which differs from Homestead in how uncles affect the calculation

Types

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 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 an 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 (*Ethash) APIs

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

APIs implements consensus.Engine, returning no APIs as ethash is an empty shell in the post-merge world.

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.ChainHeaderReader, time uint64, parent *types.Header) *big.Int

CalcDifficulty is the difficulty adjustment algorithm. It returns the difficulty that a new block should have when created at time given the parent block's time and difficulty.

func (*Ethash) Close

func (ethash *Ethash) Close() error

Close closes the exit channel to notify all backend threads exiting.

func (*Ethash) Finalize

func (ethash *Ethash) Finalize(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header, withdrawals []*types.Withdrawal)

Finalize implements consensus.Engine, accumulating the block and uncle rewards.

func (*Ethash) FinalizeAndAssemble

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

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

func (*Ethash) Prepare

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

Seal generates a new sealing request for the given input block and pushes the result into the given channel. For the ethash engine, this method will just panic as sealing is not supported anymore.

func (*Ethash) SealHash

func (ethash *Ethash) SealHash(header *types.Header) (hash common.Hash)

SealHash returns the hash of a block prior to it being sealed.

func (*Ethash) VerifyHeader

func (ethash *Ethash) VerifyHeader(chain consensus.ChainHeaderReader, header *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.ChainHeaderReader, headers []*types.Header) (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) VerifyUncles

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

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