1	import Base
2	import 0x9ee2e9a299991dcc089fe22c7f3ceb5f/src/crypto/sha/sha256.bend as SHA
3	
4	# Single checksum for SSTable v2 framing. The hub SHA-256 is trusted as-is
5	# (its own PROOF.bend proves it against the executable FIPS 180-4 spec);
6	# our laws only cover framing (digest placed after '#', verified on parse).
7	def digest(+body: String) -> String:
8	  SHA.hex(SHA.sha256(SHA.ascii(body)))
9	
10	def verify(+body: String, +claimed: String) -> Bool:
11	  String.eq(digest(body), claimed)