35 lines
1.0 KiB
Nim
35 lines
1.0 KiB
Nim
# Nimbus
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# Copyright (c) 2018-2024 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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{.push raises: [].}
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import
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eth/common, # GasInt
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../evm_errors,
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../types
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func init*(m: var GasMeter, startGas: GasInt) =
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m.gasRemaining = startGas
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m.gasRefunded = 0
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func consumeGas*(gasMeter: var GasMeter; amount: GasInt; reason: string): EvmResultVoid =
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if amount > gasMeter.gasRemaining:
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return err(memErr(OutOfGas))
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gasMeter.gasRemaining -= amount
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ok()
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func returnGas*(gasMeter: var GasMeter; amount: GasInt) =
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gasMeter.gasRemaining += amount
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# some gasRefunded operations still relying
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# on negative number
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func refundGas*(gasMeter: var GasMeter; amount: GasInt) =
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gasMeter.gasRefunded += amount
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