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@ -33,6 +33,8 @@ import (
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/params/forks"
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"github.com/ethereum/go-ethereum/rpc"
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)
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@ -95,6 +97,16 @@ type SimulatedBeacon struct {
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lastBlockTime uint64
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}
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func payloadVersion(config *params.ChainConfig, time uint64) engine.PayloadVersion {
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switch config.LatestFork(time) {
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case forks.Prague, forks.Cancun:
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return engine.PayloadV3
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case forks.Paris, forks.Shanghai:
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return engine.PayloadV2
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}
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panic("invalid fork, simulated beacon needs to be started post-merge")
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}
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// NewSimulatedBeacon constructs a new simulated beacon chain.
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func NewSimulatedBeacon(period uint64, eth *eth.Ethereum) (*SimulatedBeacon, error) {
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block := eth.BlockChain().CurrentBlock()
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@ -107,7 +119,8 @@ func NewSimulatedBeacon(period uint64, eth *eth.Ethereum) (*SimulatedBeacon, err
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// if genesis block, send forkchoiceUpdated to trigger transition to PoS
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if block.Number.Sign() == 0 {
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if _, err := engineAPI.ForkchoiceUpdatedV3(current, nil); err != nil {
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version := payloadVersion(eth.BlockChain().Config(), block.Time)
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if _, err := engineAPI.forkchoiceUpdated(current, nil, version, false); err != nil {
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return nil, err
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}
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}
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@ -171,6 +184,8 @@ func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal, timestamp u
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return fmt.Errorf("failed to sync txpool: %w", err)
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}
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version := payloadVersion(c.eth.BlockChain().Config(), timestamp)
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var random [32]byte
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rand.Read(random[:])
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fcResponse, err := c.engineAPI.forkchoiceUpdated(c.curForkchoiceState, &engine.PayloadAttributes{
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@ -179,7 +194,7 @@ func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal, timestamp u
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Withdrawals: withdrawals,
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Random: random,
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BeaconRoot: &common.Hash{},
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}, engine.PayloadV3, false)
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}, version, false)
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if err != nil {
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return err
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}
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@ -204,28 +219,39 @@ func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal, timestamp u
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}
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}
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// Independently calculate the blob hashes from sidecars.
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blobHashes := make([]common.Hash, 0)
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if envelope.BlobsBundle != nil {
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hasher := sha256.New()
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for _, commit := range envelope.BlobsBundle.Commitments {
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var c kzg4844.Commitment
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if len(commit) != len(c) {
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return errors.New("invalid commitment length")
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var (
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blobHashes []common.Hash
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beaconRoot *common.Hash
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requests [][]byte
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)
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// Compute post-shanghai fields
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if version > engine.PayloadV2 {
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// Independently calculate the blob hashes from sidecars.
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blobHashes = make([]common.Hash, 0)
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if envelope.BlobsBundle != nil {
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hasher := sha256.New()
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for _, commit := range envelope.BlobsBundle.Commitments {
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var c kzg4844.Commitment
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if len(commit) != len(c) {
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return errors.New("invalid commitment length")
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}
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copy(c[:], commit)
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blobHashes = append(blobHashes, kzg4844.CalcBlobHashV1(hasher, &c))
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}
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copy(c[:], commit)
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blobHashes = append(blobHashes, kzg4844.CalcBlobHashV1(hasher, &c))
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}
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beaconRoot = &common.Hash{}
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requests = envelope.Requests
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}
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// Mark the payload as canon
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_, err = c.engineAPI.newPayload(*payload, blobHashes, &common.Hash{}, envelope.Requests, false)
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_, err = c.engineAPI.newPayload(*payload, blobHashes, beaconRoot, requests, false)
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if err != nil {
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return err
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}
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c.setCurrentState(payload.BlockHash, finalizedHash)
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// Mark the block containing the payload as canonical
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if _, err = c.engineAPI.ForkchoiceUpdatedV3(c.curForkchoiceState, nil); err != nil {
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if _, err = c.engineAPI.forkchoiceUpdated(c.curForkchoiceState, nil, version, false); err != nil {
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return err
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}
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c.lastBlockTime = payload.Timestamp
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