mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
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00dacbd00d
* Remove custom block body root and block root methods * Add nil checks and fix tests * Fmt * Typo
141 lines
5.1 KiB
Go
141 lines
5.1 KiB
Go
package stateutil
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import (
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"bytes"
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"encoding/binary"
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"github.com/pkg/errors"
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ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
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"github.com/prysmaticlabs/prysm/shared/bytesutil"
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"github.com/prysmaticlabs/prysm/shared/featureconfig"
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"github.com/prysmaticlabs/prysm/shared/hashutil"
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"github.com/prysmaticlabs/prysm/shared/htrutils"
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"github.com/prysmaticlabs/prysm/shared/params"
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)
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// BlockHeaderRoot computes the HashTreeRoot Merkleization of
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// a BeaconBlockHeader struct according to the eth2
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// Simple Serialize specification.
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func BlockHeaderRoot(header *ethpb.BeaconBlockHeader) ([32]byte, error) {
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fieldRoots := make([][]byte, 5)
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if header != nil {
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headerSlotBuf := make([]byte, 8)
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binary.LittleEndian.PutUint64(headerSlotBuf, header.Slot)
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headerSlotRoot := bytesutil.ToBytes32(headerSlotBuf)
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fieldRoots[0] = headerSlotRoot[:]
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proposerIdxBuf := make([]byte, 8)
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binary.LittleEndian.PutUint64(proposerIdxBuf, header.ProposerIndex)
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proposerIndexRoot := bytesutil.ToBytes32(proposerIdxBuf)
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fieldRoots[1] = proposerIndexRoot[:]
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parentRoot := bytesutil.ToBytes32(header.ParentRoot)
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fieldRoots[2] = parentRoot[:]
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stateRoot := bytesutil.ToBytes32(header.StateRoot)
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fieldRoots[3] = stateRoot[:]
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bodyRoot := bytesutil.ToBytes32(header.BodyRoot)
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fieldRoots[4] = bodyRoot[:]
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}
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return htrutils.BitwiseMerkleize(hashutil.CustomSHA256Hasher(), fieldRoots, uint64(len(fieldRoots)), uint64(len(fieldRoots)))
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}
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// Eth1Root computes the HashTreeRoot Merkleization of
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// a BeaconBlockHeader struct according to the eth2
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// Simple Serialize specification.
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func Eth1Root(hasher htrutils.HashFn, eth1Data *ethpb.Eth1Data) ([32]byte, error) {
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enc := make([]byte, 0, 96)
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fieldRoots := make([][]byte, 3)
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for i := 0; i < len(fieldRoots); i++ {
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fieldRoots[i] = make([]byte, 32)
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}
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if eth1Data != nil {
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if len(eth1Data.DepositRoot) > 0 {
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depRoot := bytesutil.ToBytes32(eth1Data.DepositRoot)
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fieldRoots[0] = depRoot[:]
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enc = append(enc, depRoot[:]...)
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}
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eth1DataCountBuf := make([]byte, 8)
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binary.LittleEndian.PutUint64(eth1DataCountBuf, eth1Data.DepositCount)
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eth1CountRoot := bytesutil.ToBytes32(eth1DataCountBuf)
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fieldRoots[1] = eth1CountRoot[:]
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enc = append(enc, eth1CountRoot[:]...)
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if len(eth1Data.BlockHash) > 0 {
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blockHash := bytesutil.ToBytes32(eth1Data.BlockHash)
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fieldRoots[2] = blockHash[:]
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enc = append(enc, blockHash[:]...)
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}
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if featureconfig.Get().EnableSSZCache {
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if found, ok := cachedHasher.rootsCache.Get(string(enc)); ok && found != nil {
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return found.([32]byte), nil
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}
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}
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}
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root, err := htrutils.BitwiseMerkleize(hasher, fieldRoots, uint64(len(fieldRoots)), uint64(len(fieldRoots)))
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if err != nil {
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return [32]byte{}, err
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}
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if featureconfig.Get().EnableSSZCache {
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cachedHasher.rootsCache.Set(string(enc), root, 32)
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}
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return root, nil
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}
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// Eth1DataVotesRoot computes the HashTreeRoot Merkleization of
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// a list of Eth1Data structs according to the eth2
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// Simple Serialize specification.
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func Eth1DataVotesRoot(eth1DataVotes []*ethpb.Eth1Data) ([32]byte, error) {
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eth1VotesRoots := make([][]byte, 0)
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enc := make([]byte, len(eth1DataVotes)*32)
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hasher := hashutil.CustomSHA256Hasher()
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for i := 0; i < len(eth1DataVotes); i++ {
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eth1, err := Eth1Root(hasher, eth1DataVotes[i])
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if err != nil {
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return [32]byte{}, errors.Wrap(err, "could not compute eth1data merkleization")
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}
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copy(enc[(i*32):(i+1)*32], eth1[:])
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eth1VotesRoots = append(eth1VotesRoots, eth1[:])
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}
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hashKey := hashutil.FastSum256(enc)
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if featureconfig.Get().EnableSSZCache {
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if found, ok := cachedHasher.rootsCache.Get(string(hashKey[:])); ok && found != nil {
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return found.([32]byte), nil
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}
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}
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eth1Chunks, err := htrutils.Pack(eth1VotesRoots)
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if err != nil {
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return [32]byte{}, errors.Wrap(err, "could not chunk eth1 votes roots")
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}
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eth1VotesRootsRoot, err := htrutils.BitwiseMerkleize(
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hasher,
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eth1Chunks,
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uint64(len(eth1Chunks)),
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params.BeaconConfig().EpochsPerEth1VotingPeriod*params.BeaconConfig().SlotsPerEpoch,
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)
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if err != nil {
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return [32]byte{}, errors.Wrap(err, "could not compute eth1data votes merkleization")
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}
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eth1VotesRootBuf := new(bytes.Buffer)
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if err := binary.Write(eth1VotesRootBuf, binary.LittleEndian, uint64(len(eth1DataVotes))); err != nil {
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return [32]byte{}, errors.Wrap(err, "could not marshal eth1data votes length")
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}
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// We need to mix in the length of the slice.
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eth1VotesRootBufRoot := make([]byte, 32)
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copy(eth1VotesRootBufRoot, eth1VotesRootBuf.Bytes())
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root := htrutils.MixInLength(eth1VotesRootsRoot, eth1VotesRootBufRoot)
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if featureconfig.Get().EnableSSZCache {
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cachedHasher.rootsCache.Set(string(hashKey[:]), root, 32)
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}
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return root, nil
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}
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// AddInMixin describes a method from which a lenth mixin is added to the
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// provided root.
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func AddInMixin(root [32]byte, length uint64) ([32]byte, error) {
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rootBuf := new(bytes.Buffer)
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if err := binary.Write(rootBuf, binary.LittleEndian, length); err != nil {
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return [32]byte{}, errors.Wrap(err, "could not marshal eth1data votes length")
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}
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// We need to mix in the length of the slice.
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rootBufRoot := make([]byte, 32)
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copy(rootBufRoot, rootBuf.Bytes())
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return htrutils.MixInLength(root, rootBufRoot), nil
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}
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