Abstract: The present disclosure relates generally to roofing products, for example, shingles suitable for covering and protecting the roofs of houses, buildings, and other structures. The present disclosure relates more particularly to a roofing shingle including an upper edge, a lower edge, a first end, a second end, a headlap section, and an exposed section. A nail zone extends across the roofing shingle from the first end to the second end within the headlap section. The roofing shingle includes a top shingle layer including a top surface and a bottom surface. A reinforcement strip is secured to the bottom surface of the top shingle layer and overlaps with the nail zone. Further, a self-sealing material is disposed within the nail zone and is configured to form a seal around a mechanical fastener that punctures the roofing shingle in order to secure the roofing shingle to an underlying roof structure.

Abstract: Embodiments of the present invention provide a system for central authority-permissioned transfer of blockchain tokens. In particular, the a request is received to transfer a set of blockchain tokens that represent an ownership share in a physical asset from a first user to a second user. Information about the first user and second user is compared to a central authority repository that comprises a listing of vetted users permitted to perform transactions with blockchain tokens associated with the physical asset to determine that the first and second users are verified. In response to determining that the first and second users are verified a transaction function is built for the transfer of the set of blockchain tokens from a digital wallet of the first user to a digital wallet of the second user. Finally, the transaction function is published to a blockchain network associated with the set of blockchain tokens.