miner

Documentation

Overview

Package miner implements Ethereum block creation and mining.

Index

• Variables
• type Backend
• type BackendWithHistoricalState
• type BuildPayloadArgs
  • func (args *BuildPayloadArgs) Id() engine.PayloadID
• type Config
• type Miner
  • func New(eth Backend, config *Config, chainConfig *params.ChainConfig, ...) *Miner
  • func (miner *Miner) BuildPayload(args *BuildPayloadArgs) (*Payload, error)
  • func (miner *Miner) Close()
  • func (miner *Miner) Hashrate() uint64
  • func (miner *Miner) Mining() bool
  • func (miner *Miner) Pending() (*types.Block, *state.StateDB)
  • func (miner *Miner) PendingBlock() *types.Block
  • func (miner *Miner) PendingBlockAndReceipts() (*types.Block, types.Receipts)
  • func (miner *Miner) SetEtherbase(addr common.Address)
  • func (miner *Miner) SetExtra(extra []byte) error
  • func (miner *Miner) SetGasCeil(ceil uint64)
  • func (miner *Miner) SetRecommitInterval(interval time.Duration)
  • func (miner *Miner) Start()
  • func (miner *Miner) Stop()
  • func (miner *Miner) SubscribePendingLogs(ch chan<- []*types.Log) event.Subscription
• type Payload
  • func (payload *Payload) Resolve() *engine.ExecutionPayloadEnvelope
  • func (payload *Payload) ResolveEmpty() *engine.ExecutionPayloadEnvelope
  • func (payload *Payload) ResolveFull() *engine.ExecutionPayloadEnvelope

Variables

var DefaultConfig = Config{
	GasCeil:  30000000,
	GasPrice: big.NewInt(params.GWei),

	Recommit:          2 * time.Second,
	NewPayloadTimeout: 2 * time.Second,
}

DefaultConfig contains default settings for miner.

Types

type Backend

type Backend interface {
	BlockChain() *core.BlockChain
	TxPool() *txpool.TxPool
}

Backend wraps all methods required for mining. Only full node is capable to offer all the functions here.

type BackendWithHistoricalState

type BackendWithHistoricalState interface {
	StateAtBlock(ctx context.Context, block *types.Block, reexec uint64, base *state.StateDB, readOnly bool, preferDisk bool) (*state.StateDB, tracers.StateReleaseFunc, error)
}

type BuildPayloadArgs

type BuildPayloadArgs struct {
	Parent       common.Hash       // The parent block to build payload on top
	Timestamp    uint64            // The provided timestamp of generated payload
	FeeRecipient common.Address    // The provided recipient address for collecting transaction fee
	Random       common.Hash       // The provided randomness value
	Withdrawals  types.Withdrawals // The provided withdrawals
	BeaconRoot   *common.Hash      // The provided beaconRoot (Cancun)

	NoTxPool     bool                 // Optimism addition: option to disable tx pool contents from being included
	Transactions []*types.Transaction // Optimism addition: txs forced into the block via engine API
	GasLimit     *uint64              // Optimism addition: override gas limit of the block to build
}

BuildPayloadArgs contains the provided parameters for building payload. Check engine-api specification for more details. https://github.com/ethereum/execution-apis/blob/main/src/engine/cancun.md#payloadattributesv3

func (*BuildPayloadArgs) Id

func (args *BuildPayloadArgs) Id() engine.PayloadID

Id computes an 8-byte identifier by hashing the components of the payload arguments.

type Config

type Config struct {
	Etherbase common.Address `toml:",omitempty"` // Public address for block mining rewards
	ExtraData hexutil.Bytes  `toml:",omitempty"` // Block extra data set by the miner
	GasFloor  uint64         // Target gas floor for mined blocks.
	GasCeil   uint64         // Target gas ceiling for mined blocks.
	GasPrice  *big.Int       // Minimum gas price for mining a transaction
	Recommit  time.Duration  // The time interval for miner to re-create mining work.

	NewPayloadTimeout time.Duration // The maximum time allowance for creating a new payload

	RollupComputePendingBlock bool // Compute the pending block from tx-pool, instead of copying the latest-block
}

Config is the configuration parameters of mining.

type Miner

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

Miner creates blocks and searches for proof-of-work values.

func New

func New(eth Backend, config *Config, chainConfig *params.ChainConfig, mux *event.TypeMux, engine consensus.Engine, isLocalBlock func(header *types.Header) bool) *Miner

func (*Miner) BuildPayload

func (miner *Miner) BuildPayload(args *BuildPayloadArgs) (*Payload, error)

BuildPayload builds the payload according to the provided parameters.

func (*Miner) Close

func (miner *Miner) Close()

func (*Miner) Hashrate

func (miner *Miner) Hashrate() uint64

func (*Miner) Mining

func (miner *Miner) Mining() bool

func (*Miner) Pending

func (miner *Miner) Pending() (*types.Block, *state.StateDB)

Pending returns the currently pending block and associated state. The returned values can be nil in case the pending block is not initialized

func (*Miner) PendingBlock

func (miner *Miner) PendingBlock() *types.Block

PendingBlock returns the currently pending block. The returned block can be nil in case the pending block is not initialized.

Note, to access both the pending block and the pending state simultaneously, please use Pending(), as the pending state can change between multiple method calls

func (*Miner) PendingBlockAndReceipts

func (miner *Miner) PendingBlockAndReceipts() (*types.Block, types.Receipts)

PendingBlockAndReceipts returns the currently pending block and corresponding receipts. The returned values can be nil in case the pending block is not initialized.

func (*Miner) SetEtherbase

func (miner *Miner) SetEtherbase(addr common.Address)

func (*Miner) SetExtra

func (miner *Miner) SetExtra(extra []byte) error

func (*Miner) SetGasCeil

func (miner *Miner) SetGasCeil(ceil uint64)

SetGasCeil sets the gaslimit to strive for when mining blocks post 1559. For pre-1559 blocks, it sets the ceiling.

func (*Miner) SetRecommitInterval

func (miner *Miner) SetRecommitInterval(interval time.Duration)

SetRecommitInterval sets the interval for sealing work resubmitting.

func (*Miner) Start

func (miner *Miner) Start()

func (*Miner) Stop

func (miner *Miner) Stop()

func (*Miner) SubscribePendingLogs

func (miner *Miner) SubscribePendingLogs(ch chan<- []*types.Log) event.Subscription

SubscribePendingLogs starts delivering logs from pending transactions to the given channel.

type Payload

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

Payload wraps the built payload(block waiting for sealing). According to the engine-api specification, EL should build the initial version of the payload which has an empty transaction set and then keep update it in order to maximize the revenue. Therefore, the empty-block here is always available and full-block will be set/updated afterwards.

func (*Payload) Resolve

func (payload *Payload) Resolve() *engine.ExecutionPayloadEnvelope

Resolve returns the latest built payload and also terminates the background thread for updating payload. It's safe to be called multiple times.

func (*Payload) ResolveEmpty

func (payload *Payload) ResolveEmpty() *engine.ExecutionPayloadEnvelope

ResolveEmpty is basically identical to Resolve, but it expects empty block only. It's only used in tests.

func (*Payload) ResolveFull

func (payload *Payload) ResolveFull() *engine.ExecutionPayloadEnvelope

ResolveFull is basically identical to Resolve, but it expects full block only. Don't call Resolve until ResolveFull returns, otherwise it might block forever.