net.corda.core.transactions / BaseTransaction / mustSign

# mustSign

`val mustSign: List<PublicKeyTree>`

Public key trees that need to be fulfilled by signatures in order for the transaction to be valid. In a SignedTransaction this list is used to check whether there are any missing signatures. Note that there is nothing that forces the list to be the correct list of signers for this transaction until the transaction is verified by using LedgerTransaction.verify.

It includes the notary key, if the notary field is set.