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ee5d75732d
* Add pkg crypto * Update go.yml Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
35 lines
1.3 KiB
Go
35 lines
1.3 KiB
Go
package stateutil
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import (
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"encoding/binary"
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"github.com/prysmaticlabs/prysm/crypto/hash"
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ethpb "github.com/prysmaticlabs/prysm/proto/prysm/v1alpha1"
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"github.com/prysmaticlabs/prysm/shared/bytesutil"
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"github.com/prysmaticlabs/prysm/shared/htrutils"
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)
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// BlockHeaderRoot computes the HashTreeRoot Merkleization of
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// a BeaconBlockHeader struct according to the Ethereum
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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, uint64(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, uint64(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(hash.CustomSHA256Hasher(), fieldRoots, uint64(len(fieldRoots)), uint64(len(fieldRoots)))
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}
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