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https://github.com/ethereum/go-ethereum.git
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9021836d7d
## Why this should be merged In lieu of modifications to `core.IntrinsicGas()`, required for support of Warp in SAE. If we were to introduce variadic `options.Option`s to `IntrinsicGas()`, it's impossible to guarantee that they would always be passed. The `types.Transaction` itself isn't actually passed to `IntrinsicGas()` either, so we can't rely on it to carry payloads/hooks. ## How this works `vm.Hooks` are extended to include `PreprocessingGasCharge(tx common.Hash) (uint64, error)`, which returns the amount of gas to be charged between `core.IntrinsicGas` and `vm.EVM` execution charges. The two entry points to execution, `vm.EVM.Call()` and `vm.EVM.Create()` are modified to first spend said charge before running upstream logic. The new hook is defined on a separate interface definition, embedded in `vm.Hooks`, to allow types to implement just that method and enforce it with the `var _ vm.Preprocessor = (*impl)(nil)` pattern. ## How this was tested Integration tests via both `core.ApplyTransaction()` and `core.ApplyMessage()`. The former is more comprehensive, while the latter allows for inspection of interim error values. --------- Signed-off-by: Arran Schlosberg <519948+ARR4N@users.noreply.github.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Co-authored-by: Austin Larson <78000745+alarso16@users.noreply.github.com>
44 lines
1.6 KiB
Go
44 lines
1.6 KiB
Go
// Copyright 2025 the libevm authors.
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//
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// The libevm additions to go-ethereum are free software: you can redistribute
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// them and/or modify them under the terms of the GNU Lesser General Public License
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// as published by the Free Software Foundation, either version 3 of the License,
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// or (at your option) any later version.
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//
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// The libevm additions are distributed in the hope that they will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
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// General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see
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// <http://www.gnu.org/licenses/>.
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package ethtest
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import (
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"github.com/ava-labs/libevm/common"
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"github.com/ava-labs/libevm/consensus"
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"github.com/ava-labs/libevm/core"
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"github.com/ava-labs/libevm/core/types"
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)
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// DummyChainContext returns a dummy that returns [DummyEngine] when its
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// Engine() method is called, and panics when its GetHeader() method is called.
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func DummyChainContext() core.ChainContext {
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return chainContext{}
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}
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// DummyEngine returns a dummy that panics when its Author() method is called.
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func DummyEngine() consensus.Engine {
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return engine{}
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}
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type (
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chainContext struct{}
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engine struct{ consensus.Engine }
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)
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func (chainContext) Engine() consensus.Engine { return engine{} }
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func (chainContext) GetHeader(common.Hash, uint64) *types.Header { panic("unimplemented") }
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func (engine) Author(h *types.Header) (common.Address, error) { panic("unimplemented") }
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