gas

package
v1.10.17 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Oct 18, 2021 License: MIT Imports: 24 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 (
	ErrNoSuitableTransactions = errors.New("no suitable transactions")
)

Functions

func BumpLegacyGasPriceOnly added in v1.10.17 

func BumpLegacyGasPriceOnly(config Config, currentGasPrice, originalGasPrice *big.Int, originalGasLimit uint64) (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 added in v1.10.17 

func IsBumpErr(err error) bool

Types

type Block 

type Block struct {
	Number        int64
	Hash          common.Hash
	ParentHash    common.Hash
	BaseFeePerGas *big.Int
	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 added in v1.10.17 

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

func (*BlockHistoryEstimator) BumpLegacyGas added in v1.10.17 

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

func (*BlockHistoryEstimator) Close 

func (b *BlockHistoryEstimator) Close() error

func (*BlockHistoryEstimator) EffectiveGasPrice added in v1.10.17 

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

func (*BlockHistoryEstimator) EffectiveTipCap added in v1.10.17 

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

func (*BlockHistoryEstimator) FetchBlocks 

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

func (*BlockHistoryEstimator) FetchBlocksAndRecalculate 

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

func (*BlockHistoryEstimator) GetDynamicFee added in v1.10.17 

func (b *BlockHistoryEstimator) GetDynamicFee(gasLimit uint64) (fee DynamicFee, chainSpecificGasLimit uint64, err error)

func (*BlockHistoryEstimator) GetLegacyGas added in v1.10.17 

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

func (*BlockHistoryEstimator) OnNewLongestChain 

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

FetchHeadsAndRecalculate 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() error

type Config 

type Config interface {
	BlockHistoryEstimatorBatchSize() uint32
	BlockHistoryEstimatorBlockDelay() uint16
	BlockHistoryEstimatorBlockHistorySize() uint16
	BlockHistoryEstimatorTransactionPercentile() uint16
	ChainType() chains.ChainType
	EvmEIP1559DynamicFees() bool
	EvmFinalityDepth() uint32
	EvmGasBumpPercent() uint16
	EvmGasBumpWei() *big.Int
	EvmGasFeeCap() *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 added in v1.10.17 

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

DynamicFee encompasses both FeeCap and TipCap for EIP1559 transactions

func BumpDynamicFeeOnly added in v1.10.17 

func BumpDynamicFeeOnly(config Config, currentTipCap *big.Int, originalFee DynamicFee, originalGasLimit uint64) (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, eth.Head)
	Start() error
	Close() error
	GetLegacyGas(calldata []byte, gasLimit uint64, opts ...Opt) (gasPrice *big.Int, chainSpecificGasLimit uint64, err error)
	BumpLegacyGas(originalGasPrice *big.Int, gasLimit uint64) (bumpedGasPrice *big.Int, chainSpecificGasLimit uint64, err error)
	GetDynamicFee(gasLimit uint64) (fee DynamicFee, chainSpecificGasLimit uint64, err error)
	BumpDynamicFee(original DynamicFee, gasLimit uint64) (bumped DynamicFee, chainSpecificGasLimit uint64, err error)
}

Estimator provides an interface for estimating gas price and limit

func NewBlockHistoryEstimator 

func NewBlockHistoryEstimator(lggr logger.Logger, ethClient eth.Client, config 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 eth.Client, config Config) Estimator

func NewFixedPriceEstimator 

func NewFixedPriceEstimator(config Config) Estimator

func NewOptimism2Estimator added in v1.10.17 

func NewOptimism2Estimator(lggr logger.Logger, config Config, client optimismRPCClient) Estimator

NewOptimism2Estimator returns a new optimism 2.0 estimator

func NewOptimismEstimator 

func NewOptimismEstimator(lggr logger.Logger, config Config, client optimismRPCClient) Estimator

NewOptimismEstimator returns a new optimism estimator

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 OptimismGasPricesResponse 

type OptimismGasPricesResponse struct {
	L1GasPrice *big.Int
	L2GasPrice *big.Int
}

OptimismGasPricesResponse is the shape of the response when calling rollup_gasPrices

func (*OptimismGasPricesResponse) UnmarshalJSON 

func (g *OptimismGasPricesResponse) UnmarshalJSON(b []byte) error

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

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