proofofstake

package
v0.0.0-...-37ff43f Latest Latest
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 Go to latest Published: Feb 27, 2023 License: GPL-3.0 Imports: 31 Imported by: 0

Documentation

Overview

Package proofofstake implements the proof-of-authority consensus engine.

Index

Constants

This section is empty.

Variables

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

)

Functions

func ProofOfStakeRLP 

func ProofOfStakeRLP(header *types.Header) []byte

ProofOfStakeRLP returns the rlp bytes which needs to be signed for the proof-of-authority sealing. The RLP to sign consists of the entire header apart from the 65 byte signature contained at the end of the extra data.

Note, the method requires the extra data to be at least 65 bytes, otherwise it panics. This is done to avoid accidentally using both forms (signature present or not), which could be abused to produce different hashes for the same header.

func SealHash 

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

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

Types

type API 

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

API is a user facing RPC API to allow controlling the signer and voting mechanisms of the proof-of-authority scheme.

func (*API) Discard 

func (api *API) Discard(address common.Address)

Discard drops a currently running proposal, stopping the signer from casting further votes (either for or against).

func (*API) GetSigner 

func (api *API) GetSigner(rlpOrBlockNr *blockNumberOrHashOrRLP) (common.Address, error)

GetSigner returns the signer for a specific proofofstake block. Can be called with either a blocknumber, blockhash or an rlp encoded blob. The RLP encoded blob can either be a block or a header.

func (*API) GetSigners 

func (api *API) GetSigners(number *rpc.BlockNumber) ([]common.Address, error)

GetSigners retrieves the list of authorized signers at the specified block.

func (*API) GetSignersAtHash 

func (api *API) GetSignersAtHash(hash common.Hash) ([]common.Address, error)

GetSignersAtHash retrieves the list of authorized signers at the specified block.

func (*API) GetSnapshot 

func (api *API) GetSnapshot(number *rpc.BlockNumber) (*Snapshot, error)

GetSnapshot retrieves the state snapshot at a given block.

func (*API) GetSnapshotAtHash 

func (api *API) GetSnapshotAtHash(hash common.Hash) (*Snapshot, error)

GetSnapshotAtHash retrieves the state snapshot at a given block.

func (*API) GetValidators 

func (api *API) GetValidators() ([]common.Address, error)

GetValidators retrieves the list of authorized signers at the specified block.

func (*API) Proposals 

func (api *API) Proposals() map[common.Address]bool

Proposals returns the current proposals the node tries to uphold and vote on.

func (*API) Propose 

func (api *API) Propose(address common.Address, auth bool)

Propose injects a new authorization proposal that the signer will attempt to push through.

func (*API) Status 

func (api *API) Status() (*status, error)

Status returns the status of the last N blocks, - the number of active signers, - the number of signers, - the percentage of in-turn blocks

type ProofOfStake 

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

ProofOfStake is the proof-of-authority consensus engine proposed to support the Ethereum testnet following the Ropsten attacks.

func New 

func New(chainConfig *params.ChainConfig, db ethdb.Database,
	ethAPI *ethapi.PublicBlockChainAPI, genesisHash common.Hash) *ProofOfStake

New creates a ProofOfStake proof-of-authority consensus engine with the initial signers set to the ones provided by the user.

func (*ProofOfStake) APIs 

func (c *ProofOfStake) APIs(chain consensus.ChainHeaderReader) []rpc.API

APIs implements consensus.Engine, returning the user facing RPC API to allow controlling the validator voting.

func (*ProofOfStake) Author 

func (c *ProofOfStake) Author(header *types.Header) (common.Address, error)

Author implements consensus.Engine, returning the Ethereum address recovered from the signature in the header's extra-data section.

func (*ProofOfStake) Authorize 

func (c *ProofOfStake) Authorize(validator common.Address, signFn SignerFn, signTxFn SignerTxFn)

Authorize injects a private key into the consensus engine to mint new blocks with.

func (*ProofOfStake) CalcDifficulty 

func (c *ProofOfStake) 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: * DIFF_NOTURN(2) if BLOCK_NUMBER % SIGNER_COUNT != SIGNER_INDEX * DIFF_INTURN(1) if BLOCK_NUMBER % SIGNER_COUNT == SIGNER_INDEX

func (*ProofOfStake) Close 

func (c *ProofOfStake) Close() error

Close implements consensus.Engine. It's a noop for proofofstake as there are no background threads.

func (*ProofOfStake) Finalize 

func (c *ProofOfStake) Finalize(chain consensus.ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, uncles []*types.Header) error

Finalize implements consensus.Engine, ensuring no uncles are set, nor block rewards given.

func (*ProofOfStake) FinalizeAndAssemble 

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

FinalizeAndAssemble implements consensus.Engine, ensuring no uncles are set, nor block rewards given, and returns the final block.

func (*ProofOfStake) GetDepositor 

func (p *ProofOfStake) GetDepositor(validator common.Address, blockHash common.Hash) (common.Address, error)

func (*ProofOfStake) GetValidators 

func (p *ProofOfStake) GetValidators(number uint64, blockHash common.Hash) ([]common.Address, error)

func (*ProofOfStake) GetValidators1 

func (p *ProofOfStake) GetValidators1(blockHash common.Hash) ([]common.Address, error)

func (*ProofOfStake) GetValidatorsAddress1 

func (p *ProofOfStake) GetValidatorsAddress1(number uint64, blockHash common.Hash) ([]common.Address, error)

func (*ProofOfStake) Prepare 

func (c *ProofOfStake) Prepare(chain consensus.ChainHeaderReader, header *types.Header) error

Prepare implements consensus.Engine, preparing all the consensus fields of the header for running the transactions on top.

func (*ProofOfStake) Seal 

func (c *ProofOfStake) Seal(chain consensus.ChainHeaderReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error

Seal implements consensus.Engine, attempting to create a sealed block using the local signing credentials.

func (*ProofOfStake) SealHash 

func (c *ProofOfStake) SealHash(header *types.Header) common.Hash

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

func (*ProofOfStake) VerifyHeader 

func (c *ProofOfStake) VerifyHeader(chain consensus.ChainHeaderReader, header *types.Header, seal bool) error

VerifyHeader checks whether a header conforms to the consensus rules.

func (*ProofOfStake) VerifyHeaders 

func (c *ProofOfStake) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error)

VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers. The method returns a quit channel to abort the operations and a results channel to retrieve the async verifications (the order is that of the input slice).

func (*ProofOfStake) VerifyUncles 

func (c *ProofOfStake) VerifyUncles(chain consensus.ChainReader, block *types.Block) error

VerifyUncles implements consensus.Engine, always returning an error for any uncles as this consensus mechanism doesn't permit uncles.

type SignerFn 

type SignerFn func(signer accounts.Account, mimeType string, message []byte) ([]byte, error)

SignerFn hashes and signs the data to be signed by a backing account.

type SignerTxFn 

type SignerTxFn func(accounts.Account, *types.Transaction, *big.Int) (*types.Transaction, error)

type Snapshot 

type Snapshot struct {
	Number           uint64                      `json:"number"`             // Block number where the snapshot was created
	Hash             common.Hash                 `json:"hash"`               // Block hash where the snapshot was created
	Signers          map[common.Address]struct{} `json:"signers"`            // Set of authorized signers at this moment
	Recents          map[uint64]common.Address   `json:"recents"`            // Set of recent signers for spam protections
	RecentForkHashes map[uint64]string           `json:"recent_fork_hashes"` // Set of recent forkHash
	Votes            []*Vote                     `json:"votes"`              // List of votes cast in chronological order
	Tally            map[common.Address]Tally    `json:"tally"`              // Current vote tally to avoid recalculating
	// contains filtered or unexported fields
}

Snapshot is the state of the authorization voting at a given point in time.

type Tally 

type Tally struct {
	Authorize bool `json:"authorize"` // Whether the vote is about authorizing or kicking someone
	Votes     int  `json:"votes"`     // Number of votes until now wanting to pass the proposal
}

Tally is a simple vote tally to keep the current score of votes. Votes that go against the proposal aren't counted since it's equivalent to not voting.

type Vote 

type Vote struct {
	Signer    common.Address `json:"signer"`    // Authorized signer that cast this vote
	Block     uint64         `json:"block"`     // Block number the vote was cast in (expire old votes)
	Address   common.Address `json:"address"`   // Account being voted on to change its authorization
	Authorize bool           `json:"authorize"` // Whether to authorize or deauthorize the voted account
}

Vote represents a single vote that an authorized signer made to modify the list of authorizations.

Source Files

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