Return a HashWriter primed for tagged hashes (as specified in BIP 340).
The returned object will have SHA256(tag) written to it twice (= 64 bytes). A tagged hash can be computed by feeding the message into this object, and then calling HashWriter::GetSHA256().
A HashWriter primed with the tag hash.
| Name | Description |
|---|---|
| tag | The tag string that identifies the hash domain. |