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l2pricing.go
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l2pricing.go
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// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/nitro/blob/master/LICENSE
package l2pricing
import (
"math/big"
"github.com/offchainlabs/nitro/arbos/storage"
)
type L2PricingState struct {
storage *storage.Storage
speedLimitPerSecond storage.StorageBackedUint64
perBlockGasLimit storage.StorageBackedUint64
baseFeeWei storage.StorageBackedBigUint
minBaseFeeWei storage.StorageBackedBigUint
gasBacklog storage.StorageBackedUint64
pricingInertia storage.StorageBackedUint64
backlogTolerance storage.StorageBackedUint64
}
const (
speedLimitPerSecondOffset uint64 = iota
perBlockGasLimitOffset
baseFeeWeiOffset
minBaseFeeWeiOffset
gasBacklogOffset
pricingInertiaOffset
backlogToleranceOffset
)
const GethBlockGasLimit = 1 << 50
func InitializeL2PricingState(sto *storage.Storage) error {
_ = sto.SetUint64ByUint64(speedLimitPerSecondOffset, InitialSpeedLimitPerSecondV0)
_ = sto.SetUint64ByUint64(perBlockGasLimitOffset, InitialPerBlockGasLimitV0)
_ = sto.SetUint64ByUint64(baseFeeWeiOffset, InitialBaseFeeWei)
_ = sto.SetUint64ByUint64(gasBacklogOffset, 0)
_ = sto.SetUint64ByUint64(pricingInertiaOffset, InitialPricingInertia)
_ = sto.SetUint64ByUint64(backlogToleranceOffset, InitialBacklogTolerance)
return sto.SetUint64ByUint64(minBaseFeeWeiOffset, InitialMinimumBaseFeeWei)
}
func OpenL2PricingState(sto *storage.Storage) *L2PricingState {
return &L2PricingState{
sto,
sto.OpenStorageBackedUint64(speedLimitPerSecondOffset),
sto.OpenStorageBackedUint64(perBlockGasLimitOffset),
sto.OpenStorageBackedBigUint(baseFeeWeiOffset),
sto.OpenStorageBackedBigUint(minBaseFeeWeiOffset),
sto.OpenStorageBackedUint64(gasBacklogOffset),
sto.OpenStorageBackedUint64(pricingInertiaOffset),
sto.OpenStorageBackedUint64(backlogToleranceOffset),
}
}
func (ps *L2PricingState) BaseFeeWei() (*big.Int, error) {
return ps.baseFeeWei.Get()
}
func (ps *L2PricingState) SetBaseFeeWei(val *big.Int) error {
return ps.baseFeeWei.SetSaturatingWithWarning(val, "L2 base fee")
}
func (ps *L2PricingState) MinBaseFeeWei() (*big.Int, error) {
return ps.minBaseFeeWei.Get()
}
func (ps *L2PricingState) SetMinBaseFeeWei(val *big.Int) error {
// This modifies the "minimum basefee" parameter, but doesn't modify the current basefee.
// If this increases the minimum basefee, then the basefee might be below the minimum for a little while.
// If so, the basefee will increase by up to a factor of two per block, until it reaches the minimum.
return ps.minBaseFeeWei.SetChecked(val)
}
func (ps *L2PricingState) SpeedLimitPerSecond() (uint64, error) {
return ps.speedLimitPerSecond.Get()
}
func (ps *L2PricingState) SetSpeedLimitPerSecond(limit uint64) error {
return ps.speedLimitPerSecond.Set(limit)
}
func (ps *L2PricingState) PerBlockGasLimit() (uint64, error) {
return ps.perBlockGasLimit.Get()
}
func (ps *L2PricingState) SetMaxPerBlockGasLimit(limit uint64) error {
return ps.perBlockGasLimit.Set(limit)
}
func (ps *L2PricingState) GasBacklog() (uint64, error) {
return ps.gasBacklog.Get()
}
func (ps *L2PricingState) SetGasBacklog(backlog uint64) error {
return ps.gasBacklog.Set(backlog)
}
func (ps *L2PricingState) PricingInertia() (uint64, error) {
return ps.pricingInertia.Get()
}
func (ps *L2PricingState) SetPricingInertia(val uint64) error {
return ps.pricingInertia.Set(val)
}
func (ps *L2PricingState) BacklogTolerance() (uint64, error) {
return ps.backlogTolerance.Get()
}
func (ps *L2PricingState) SetBacklogTolerance(val uint64) error {
return ps.backlogTolerance.Set(val)
}
func (ps *L2PricingState) Restrict(err error) {
ps.storage.Burner().Restrict(err)
}