Add the specified asset to the vault.
Returns the final asset in the account vault defined as follows: If asset is
a non-fungible asset, then returns the same as asset. If asset is a
fungible asset, then returns the total fungible asset in the account
vault after asset was added to it.
Creates a new note. asset is the asset to be included in the note. tag is
the tag to be included in the note. recipient is the recipient of the note.
Returns the id of the created note.
Verifies a signature against a public key and a message. The procedure gets as inputs the hash
of the public key and the hash of the message via the operand stack. The signature is expected
to be provided via the advice provider. The signature is valid if and only if the procedure
returns.