gas

package
v1.6.0-debug-vrfv1-rin... Latest Latest
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 Go to latest Published: Aug 23, 2022 License: MIT Imports: 23 Imported by: 0

Documentation

Index

Constants

View Source 
const LegacyTxType = TxType(0x0)

Variables

View Source 
var (
	ErrBumpGasExceedsLimit = errors.New("gas bump exceeds limit")
	ErrBump                = errors.New("gas bump failed")
)
View Source 
var ErrMissingBlock = errors.New("missing block")
View Source 
var (
	ErrNoSuitableTransactions = errors.New("no suitable transactions")
)
View Source 
var MaxStartTime = 10 * time.Second

MaxStartTime is the maximum amount of time we are allowed to spend trying to fill initial data on start. This must be capped because it can block the application from starting.

Functions

func BumpLegacyGasPriceOnly 

func BumpLegacyGasPriceOnly(cfg Config, lggr logger.SugaredLogger, currentGasPrice, originalGasPrice *big.Int, originalGasLimit uint64, maxGasPriceWei *big.Int) (gasPrice *big.Int, chainSpecificGasLimit uint64, err error)

BumpLegacyGasPriceOnly will increase the price and apply multiplier to the gas limit

func HexToInt64 

func HexToInt64(input interface{}) int64

HexToInt64 performs the inverse of Int64ToHex Returns 0 on invalid input

func Int64ToHex 

func Int64ToHex(n int64) string

Int64ToHex converts an int64 into go-ethereum's hex representation

func IsBumpErr 

func IsBumpErr(err error) bool

Types

type Block 

type Block struct {
	Number        int64
	Hash          common.Hash
	ParentHash    common.Hash
	BaseFeePerGas *big.Int
	Timestamp     time.Time
	Transactions  []Transaction
}

Block represents an ethereum block This type is only used for the block history estimator, and can be expensive to unmarshal. Don't add unnecessary fields here.

func (Block) MarshalJSON 

func (b Block) MarshalJSON() ([]byte, error)

MarshalJSON implements json marshalling for Block

func (*Block) UnmarshalJSON 

func (b *Block) UnmarshalJSON(data []byte) error

UnmarshalJSON unmarshals to a Block

type BlockHistoryEstimator 

type BlockHistoryEstimator struct {
	utils.StartStopOnce
	// contains filtered or unexported fields
}

func (*BlockHistoryEstimator) BumpDynamicFee 

func (b *BlockHistoryEstimator) BumpDynamicFee(originalFee DynamicFee, originalGasLimit uint64, maxGasPriceWei *big.Int) (bumped DynamicFee, chainSpecificGasLimit uint64, err error)

func (*BlockHistoryEstimator) BumpLegacyGas 

func (b *BlockHistoryEstimator) BumpLegacyGas(originalGasPrice *big.Int, gasLimit uint64, maxGasPriceWei *big.Int) (bumpedGasPrice *big.Int, chainSpecificGasLimit uint64, err error)

func (*BlockHistoryEstimator) Close 

func (b *BlockHistoryEstimator) Close() error

func (*BlockHistoryEstimator) EffectiveGasPrice 

func (b *BlockHistoryEstimator) EffectiveGasPrice(block Block, tx Transaction) *big.Int

func (*BlockHistoryEstimator) EffectiveTipCap 

func (b *BlockHistoryEstimator) EffectiveTipCap(block Block, tx Transaction) *big.Int

func (*BlockHistoryEstimator) FetchBlocks 

func (b *BlockHistoryEstimator) FetchBlocks(ctx context.Context, head *evmtypes.Head) error

FetchBlocks fetches block history leading up to the given head.

func (*BlockHistoryEstimator) FetchBlocksAndRecalculate 

func (b *BlockHistoryEstimator) FetchBlocksAndRecalculate(ctx context.Context, head *evmtypes.Head)

FetchBlocksAndRecalculate fetches block history leading up to head and recalculates gas price.

func (*BlockHistoryEstimator) GetDynamicFee 

func (b *BlockHistoryEstimator) GetDynamicFee(gasLimit uint64, maxGasPriceWei *big.Int) (fee DynamicFee, chainSpecificGasLimit uint64, err error)

func (*BlockHistoryEstimator) GetLegacyGas 

func (b *BlockHistoryEstimator) GetLegacyGas(_ []byte, gasLimit uint64, maxGasPriceWei *big.Int, _ ...Opt) (gasPrice *big.Int, chainSpecificGasLimit uint64, err error)

func (*BlockHistoryEstimator) OnNewLongestChain 

func (b *BlockHistoryEstimator) OnNewLongestChain(ctx context.Context, head *evmtypes.Head)

OnNewLongestChain recalculates and sets global gas price if a sampled new head comes in and we are not currently fetching

func (*BlockHistoryEstimator) Recalculate 

func (b *BlockHistoryEstimator) Recalculate(head *evmtypes.Head)

Recalculate adds the given heads to the history and recalculates gas price.

func (*BlockHistoryEstimator) RollingBlockHistory 

func (b *BlockHistoryEstimator) RollingBlockHistory() []Block

func (*BlockHistoryEstimator) Start 

func (b *BlockHistoryEstimator) Start(ctx context.Context) error

Start starts BlockHistoryEstimator service. The provided context can be used to terminate Start sequence.

type Config 

type Config interface {
	BlockHistoryEstimatorBatchSize() uint32
	BlockHistoryEstimatorBlockDelay() uint16
	BlockHistoryEstimatorBlockHistorySize() uint16
	BlockHistoryEstimatorTransactionPercentile() uint16
	BlockHistoryEstimatorEIP1559FeeCapBufferBlocks() uint16
	ChainType() config.ChainType
	EvmEIP1559DynamicFees() bool
	EvmFinalityDepth() uint32
	EvmGasBumpPercent() uint16
	EvmGasBumpThreshold() uint64
	EvmGasBumpWei() *big.Int
	EvmGasFeeCapDefault() *big.Int
	EvmGasLimitMultiplier() float32
	EvmGasPriceDefault() *big.Int
	EvmGasTipCapDefault() *big.Int
	EvmGasTipCapMinimum() *big.Int
	EvmMaxGasPriceWei() *big.Int
	EvmMinGasPriceWei() *big.Int
	GasEstimatorMode() string
}

Config defines an interface for configuration in the gas package

type DynamicFee 

type DynamicFee struct {
	FeeCap *big.Int
	TipCap *big.Int
}

DynamicFee encompasses both FeeCap and TipCap for EIP1559 transactions

func BumpDynamicFeeOnly 

func BumpDynamicFeeOnly(config Config, lggr logger.SugaredLogger, currentTipCap *big.Int, currentBaseFee *big.Int, originalFee DynamicFee, originalGasLimit uint64, maxGasPriceWei *big.Int) (bumped DynamicFee, chainSpecificGasLimit uint64, err error)

BumpDynamicFeeOnly bumps the tip cap and max gas price if necessary

type Estimator 

type Estimator interface {
	OnNewLongestChain(context.Context, *evmtypes.Head)
	Start(context.Context) error
	Close() error
	// Calculates initial gas fee for non-EIP1559 transaction
	// maxGasPriceWei parameter is the highest possible gas fee cap that the function will return
	GetLegacyGas(calldata []byte, gasLimit uint64, maxGasPriceWei *big.Int, opts ...Opt) (gasPrice *big.Int, chainSpecificGasLimit uint64, err error)
	// Increases gas price and/or limit for non-EIP1559 transactions
	// if the bumped gas fee is greater than maxGasPriceWei, the method returns an error
	BumpLegacyGas(originalGasPrice *big.Int, gasLimit uint64, maxGasPriceWei *big.Int) (bumpedGasPrice *big.Int, chainSpecificGasLimit uint64, err error)
	// Calculates initial gas fee for gas for EIP1559 transactions
	// maxGasPriceWei parameter is the highest possible gas fee cap that the function will return
	GetDynamicFee(gasLimit uint64, maxGasPriceWei *big.Int) (fee DynamicFee, chainSpecificGasLimit uint64, err error)
	// Increases gas price and/or limit for non-EIP1559 transactions
	// if the bumped gas fee or tip caps are greater than maxGasPriceWei, the method returns an error
	BumpDynamicFee(original DynamicFee, gasLimit uint64, maxGasPriceWei *big.Int) (bumped DynamicFee, chainSpecificGasLimit uint64, err error)
}

Estimator provides an interface for estimating gas price and limit

func NewBlockHistoryEstimator 

func NewBlockHistoryEstimator(lggr logger.Logger, ethClient evmclient.Client, cfg Config, chainID big.Int) Estimator

NewBlockHistoryEstimator returns a new BlockHistoryEstimator that listens for new heads and updates the base gas price dynamically based on the configured percentile of gas prices in that block

func NewEstimator 

func NewEstimator(lggr logger.Logger, ethClient evmclient.Client, cfg Config) Estimator

NewEstimator returns the estimator for a given config

func NewFixedPriceEstimator 

func NewFixedPriceEstimator(cfg Config, lggr logger.Logger) Estimator

NewFixedPriceEstimator returns a new "FixedPrice" estimator which will always use the config default values for gas prices and limits

func NewL2SuggestedEstimator added in v1.5.0 

func NewL2SuggestedEstimator(lggr logger.Logger, config Config, client rpcClient) Estimator

NewL2SuggestedEstimator returns a new Estimator which uses the L2 suggested gas price.

type Opt 

type Opt int

Opt is an option for a gas estimator 

const (
	// OptForceRefetch forces the estimator to bust a cache if necessary
	OptForceRefetch Opt = iota
)

type Transaction 

type Transaction struct {
	GasPrice             *big.Int
	GasLimit             uint64
	MaxFeePerGas         *big.Int
	MaxPriorityFeePerGas *big.Int
	Type                 TxType
	Hash                 common.Hash
}

Transaction represents an ethereum transaction Use our own type because geth's type has validation failures on e.g. zero gas used, which can occur on other chains. This type is only used for the block history estimator, and can be expensive to unmarshal. Don't add unnecessary fields here.

func (*Transaction) UnmarshalJSON 

func (t *Transaction) UnmarshalJSON(data []byte) error

UnmarshalJSON unmarshals a Transaction

type TxType 

type TxType uint8

func (*TxType) UnmarshalJSON 

func (txt *TxType) UnmarshalJSON(data []byte) error

NOTE: Need to roll our own unmarshaller since geth's hexutil.Uint64 does not handle double zeroes e.g. 0x00

Source Files

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