func (b *DirectoryBlock) BuildKeyMerkleRoot() (keyMR interfaces.IHash, err error) {
// Create the Entry Block Key Merkle Root from the hash of Header and the Body Merkle Root
hashes := make([]interfaces.IHash, 0, 2)
binaryEBHeader, _ := b.GetHeader().MarshalBinary()
hashes = append(hashes, primitives.Sha(binaryEBHeader))
hashes = append(hashes, b.GetHeader().GetBodyMR())
merkle := primitives.BuildMerkleTreeStore(hashes)
keyMR = merkle[len(merkle)-1] // MerkleRoot is not marshalized in Dir Block
b.KeyMR = keyMR
return keyMR, nil
}
func (b *DirectoryBlock) BuildBodyMR() (mr interfaces.IHash, err error) {
hashes := make([]interfaces.IHash, len(b.GetDBEntries()))
for i, entry := range b.GetDBEntries() {
data, _ := entry.MarshalBinary()
hashes[i] = primitives.Sha(data)
}
if len(hashes) == 0 {
hashes = append(hashes, primitives.Sha(nil))
}
merkle := primitives.BuildMerkleTreeStore(hashes)
return merkle[len(merkle)-1], nil
}
func (b *DirectoryBlock) BuildKeyMerkleRoot() (keyMR interfaces.IHash, err error) {
// Create the Entry Block Key Merkle Root from the hash of Header and the Body Merkle Root
hashes := make([]interfaces.IHash, 0, 2)
bodyKeyMR := b.BodyKeyMR() //This needs to be called first to build the header properly!!
headerHash, err := b.HeaderHash()
if err != nil {
return nil, err
}
hashes = append(hashes, headerHash)
hashes = append(hashes, bodyKeyMR)
merkle := primitives.BuildMerkleTreeStore(hashes)
keyMR = merkle[len(merkle)-1] // MerkleRoot is not marshalized in Dir Block
b.KeyMR = keyMR
b.GetFullHash() // Create the Full Hash when we create the keyMR
return primitives.NewHash(keyMR.Bytes()), nil
}
func (b *DirectoryBlock) BuildBodyMR() (interfaces.IHash, error) {
hashes := make([]interfaces.IHash, len(b.GetDBEntries()))
for i, entry := range b.GetDBEntries() {
data, err := entry.MarshalBinary()
if err != nil {
return nil, err
}
hashes[i] = primitives.Sha(data)
}
if len(hashes) == 0 {
hashes = append(hashes, primitives.Sha(nil))
}
merkleTree := primitives.BuildMerkleTreeStore(hashes)
merkleRoot := merkleTree[len(merkleTree)-1]
b.GetHeader().SetBodyMR(merkleRoot)
return merkleRoot, nil
}
// MR calculates the Merkle Root of the Entry Block Body. See func
// primitives.BuildMerkleTreeStore(hashes []interfaces.IHash) (merkles []interfaces.IHash) in common/merkle.go.
func (e *EBlockBody) MR() interfaces.IHash {
mrs := primitives.BuildMerkleTreeStore(e.EBEntries)
r := mrs[len(mrs)-1]
return r
}