WAVES smart account

let main_pubkey = base58'qweqwe'
let main_address = addressFromPublicKey(main_pubkey)
match tx {
    case t:ExchangeTransaction => sigVerify(tx.bodyBytes, tx.proofs[0], tx.senderPublicKey)
    case t:TransferTransaction => main_address == addressFromRecipient(t.recipient)
    case t:SetScriptTransaction => sigVerify(tx.bodyBytes, tx.proofs[0], main_pubkey)
    case _ => false
}