96 lines
2.5 KiB
Go
96 lines
2.5 KiB
Go
package types
|
|
|
|
import (
|
|
fmt "fmt"
|
|
math "math"
|
|
|
|
sdk "github.com/cosmos/cosmos-sdk/types"
|
|
)
|
|
|
|
// ErrorNegativeGasConsumed defines an error thrown when the amount of gas refunded results in a
|
|
// negative gas consumed amount.
|
|
// Copied from cosmos-sdk
|
|
type ErrorNegativeGasConsumed struct {
|
|
Descriptor string
|
|
}
|
|
|
|
// ErrorGasOverflow defines an error thrown when an action results gas consumption
|
|
// unsigned integer overflow.
|
|
type ErrorGasOverflow struct {
|
|
Descriptor string
|
|
}
|
|
|
|
type infiniteGasMeterWithLimit struct {
|
|
consumed sdk.Gas
|
|
limit sdk.Gas
|
|
}
|
|
|
|
// NewInfiniteGasMeterWithLimit returns a reference to a new infiniteGasMeter.
|
|
func NewInfiniteGasMeterWithLimit(limit sdk.Gas) sdk.GasMeter {
|
|
return &infiniteGasMeterWithLimit{
|
|
consumed: 0,
|
|
limit: limit,
|
|
}
|
|
}
|
|
|
|
func (g *infiniteGasMeterWithLimit) GasConsumed() sdk.Gas {
|
|
return g.consumed
|
|
}
|
|
|
|
func (g *infiniteGasMeterWithLimit) GasConsumedToLimit() sdk.Gas {
|
|
return g.consumed
|
|
}
|
|
|
|
func (g *infiniteGasMeterWithLimit) Limit() sdk.Gas {
|
|
return g.limit
|
|
}
|
|
|
|
// addUint64Overflow performs the addition operation on two uint64 integers and
|
|
// returns a boolean on whether or not the result overflows.
|
|
func addUint64Overflow(a, b uint64) (uint64, bool) {
|
|
if math.MaxUint64-a < b {
|
|
return 0, true
|
|
}
|
|
|
|
return a + b, false
|
|
}
|
|
|
|
func (g *infiniteGasMeterWithLimit) ConsumeGas(amount sdk.Gas, descriptor string) {
|
|
var overflow bool
|
|
// TODO: Should we set the consumed field after overflow checking?
|
|
g.consumed, overflow = addUint64Overflow(g.consumed, amount)
|
|
if overflow {
|
|
panic(ErrorGasOverflow{descriptor})
|
|
}
|
|
}
|
|
|
|
// RefundGas will deduct the given amount from the gas consumed. If the amount is greater than the
|
|
// gas consumed, the function will panic.
|
|
//
|
|
// Use case: This functionality enables refunding gas to the trasaction or block gas pools so that
|
|
// EVM-compatible chains can fully support the go-ethereum StateDb interface.
|
|
// See https://github.com/cosmos/cosmos-sdk/pull/9403 for reference.
|
|
func (g *infiniteGasMeterWithLimit) RefundGas(amount sdk.Gas, descriptor string) {
|
|
if g.consumed < amount {
|
|
panic(ErrorNegativeGasConsumed{Descriptor: descriptor})
|
|
}
|
|
|
|
g.consumed -= amount
|
|
}
|
|
|
|
func (g *infiniteGasMeterWithLimit) IsPastLimit() bool {
|
|
return false
|
|
}
|
|
|
|
func (g *infiniteGasMeterWithLimit) IsOutOfGas() bool {
|
|
return false
|
|
}
|
|
|
|
func (g *infiniteGasMeterWithLimit) String() string {
|
|
return fmt.Sprintf("InfiniteGasMeter:\n consumed: %d", g.consumed)
|
|
}
|
|
|
|
func (g *infiniteGasMeterWithLimit) GasRemaining() sdk.Gas {
|
|
return math.MaxUint64
|
|
}
|