Bitcoin covenants restrict how an output may be spent by placing conditions in that output’s locking script. Covenants can be used to construct vaults, which give an owner time to recover funds after an unauthorized withdrawal attempt. This report compares simplified vault constructions using presigned transactions, CTV, APO/APOAS, TXHASH, CCV, and the OP_CAT-based Purrfect Vault. We consider their tradeoffs in terms of withdrawal flexibility, fee management, operational complexity, and on-chain cost.