mirror of
https://github.com/OffchainLabs/prysm.git
synced 2026-01-08 15:13:57 -05:00
34 lines
1.2 KiB
Go
34 lines
1.2 KiB
Go
package stateutil
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import (
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"encoding/binary"
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"github.com/OffchainLabs/prysm/v7/encoding/bytesutil"
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"github.com/OffchainLabs/prysm/v7/encoding/ssz"
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ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
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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([][32]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 ssz.BitwiseMerkleize(fieldRoots, uint64(len(fieldRoots)), uint64(len(fieldRoots)))
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}
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