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bedfd12e2d
## Why this should be merged Required for [ACP-194](https://github.com/avalanche-foundation/ACPs/tree/main/ACPs/194-streaming-asynchronous-execution#gas-charged) $\lambda$ bound on gas consumption. ## How this works Hook into `core.StateTransition.TransitionDb()` as this is the bottom of all execution paths (e.g. `core.ApplyTransaction()` as used in SAE, `core.StateProcessor.Process(*Block,...)`, etc.). Once consumed gas is no longer changing (i.e. after all spends and refunds), the transaction limit is passed to the hook to determine the minimum consumption, which is applied. ## How this was tested Unit test via `core.ApplyTransaction()` as this is our entry point in SAE. --------- Signed-off-by: Arran Schlosberg <519948+ARR4N@users.noreply.github.com> Co-authored-by: Stephen Buttolph <stephen@avalabs.org>
61 lines
2 KiB
Go
61 lines
2 KiB
Go
// Copyright 2024 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 core
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import (
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"github.com/ava-labs/libevm/log"
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"github.com/ava-labs/libevm/params"
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)
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func (st *StateTransition) rulesHooks() params.RulesHooks {
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bCtx := st.evm.Context
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rules := st.evm.ChainConfig().Rules(bCtx.BlockNumber, bCtx.Random != nil, bCtx.Time)
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return rules.Hooks()
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}
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// canExecuteTransaction is a convenience wrapper for calling the
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// [params.RulesHooks.CanExecuteTransaction] hook.
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func (st *StateTransition) canExecuteTransaction() error {
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hooks := st.rulesHooks()
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if err := hooks.CanExecuteTransaction(st.msg.From, st.msg.To, st.state); err != nil {
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log.Debug(
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"Transaction execution blocked by libevm hook",
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"from", st.msg.From,
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"to", st.msg.To,
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"hooks", log.TypeOf(hooks),
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"reason", err,
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)
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return err
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}
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return nil
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}
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// consumeMinimumGas updates the gas remaining to reflect the value returned by
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// [params.RulesHooks.MinimumGasConsumption]. It MUST be called after all code
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// that modifies gas consumption but before the balance is returned for
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// remaining gas.
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func (st *StateTransition) consumeMinimumGas() {
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limit := st.msg.GasLimit
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minConsume := min(
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limit, // as documented in [params.RulesHooks]
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st.rulesHooks().MinimumGasConsumption(limit),
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)
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st.gasRemaining = min(
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st.gasRemaining,
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limit-minConsume,
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)
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}
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