I only have a surface-level understanding of smart contracts, but you'd need an ...

		Arnavion on Dec 24, 2022 \| parent \| context \| favorite \| on: Evolution of the Ethereum proof-of-stake consensus... I only have a surface-level understanding of smart contracts, but you'd need an oracle for the off-chain validation part of the three situations you mentioned, and https://ethereum.org/en/developers/docs/oracles/ seems to have some contract examples.