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block: document hash caching better

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Signed-off-by: Roman Khimov <roman@nspcc.ru>
This commit is contained in:
Roman Khimov 2024-11-14 22:42:28 +03:00
parent 7af2ab92d2
commit bbec25de43
1 changed files with 6 additions and 2 deletions
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8
pkg/core/block/header.go
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@ -73,7 +73,10 @@ type baseAux struct {
Witnesses []transaction.Witness `json:"witnesses"`
}
// Hash returns the hash of the block.
// Hash returns the hash of the block. Notice that it is cached internally,
// so no matter how you change the [Header] after the first invocation of this
// method it won't change. To get an updated hash in case you're changing
// the [Header] please encode/decode it.
func (b *Header) Hash() util.Uint256 {
if b.hash.Equals(util.Uint256{}) {
b.createHash()
@ -81,7 +84,8 @@ func (b *Header) Hash() util.Uint256 {
return b.hash
}
// DecodeBinary implements the Serializable interface.
// DecodeBinary implements the [io.Serializable] interface. Notice that it
// also automatically updates the internal hash cache, see [Header.Hash].
func (b *Header) DecodeBinary(br *io.BinReader) {
b.decodeHashableFields(br)
witnessCount := br.ReadVarUint()