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105 lines
3.2 KiB
105 lines
3.2 KiB
// Copyright 2023 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it 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
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// GNU Lesser 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 <http://www.gnu.org/licenses/>.
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package catalyst
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import (
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"context"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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)
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// simulatedBeaconAPI provides a RPC API for SimulatedBeacon.
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type simulatedBeaconAPI struct {
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sim *SimulatedBeacon
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}
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// newSimulatedBeaconAPI returns an instance of simulatedBeaconAPI with a
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// buffered commit channel. If period is zero, it starts a goroutine to handle
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// new tx events.
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func newSimulatedBeaconAPI(sim *SimulatedBeacon) *simulatedBeaconAPI {
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api := &simulatedBeaconAPI{sim: sim}
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if sim.period == 0 {
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// mine on demand if period is set to 0
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go api.loop()
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}
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return api
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}
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// loop is the main loop for the API when it's running in period = 0 mode. It
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// ensures that block production is triggered as soon as a new withdrawal or
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// transaction is received.
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func (a *simulatedBeaconAPI) loop() {
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var (
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newTxs = make(chan core.NewTxsEvent)
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newWxs = make(chan newWithdrawalsEvent)
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newTxsSub = a.sim.eth.TxPool().SubscribeTransactions(newTxs, true)
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newWxsSub = a.sim.withdrawals.subscribe(newWxs)
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doCommit = make(chan struct{}, 1)
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)
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defer newTxsSub.Unsubscribe()
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defer newWxsSub.Unsubscribe()
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// A background thread which signals to the simulator when to commit
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// based on messages over doCommit.
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go func() {
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for range doCommit {
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a.sim.Commit()
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a.sim.eth.TxPool().Sync()
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// It's worth noting that in case a tx ends up in the pool listed as
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// "executable", but for whatever reason the miner does not include it in
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// a block -- maybe the miner is enforcing a higher tip than the pool --
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// this code will spinloop.
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for {
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if executable, _ := a.sim.eth.TxPool().Stats(); executable == 0 {
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break
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}
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a.sim.Commit()
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}
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}
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}()
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for {
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select {
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case <-a.sim.shutdownCh:
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close(doCommit)
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return
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case <-newWxs:
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select {
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case doCommit <- struct{}{}:
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default:
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}
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case <-newTxs:
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select {
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case doCommit <- struct{}{}:
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default:
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}
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}
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}
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}
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// AddWithdrawal adds a withdrawal to the pending queue.
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func (a *simulatedBeaconAPI) AddWithdrawal(ctx context.Context, withdrawal *types.Withdrawal) error {
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return a.sim.withdrawals.add(withdrawal)
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}
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// SetFeeRecipient sets the fee recipient for block building purposes.
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func (a *simulatedBeaconAPI) SetFeeRecipient(ctx context.Context, feeRecipient common.Address) {
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a.sim.setFeeRecipient(feeRecipient)
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}
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