RelayLength

The MDI-BB84 finite key length per announced Bell state

4/4 passed in 5ms

Test	What it does	Result
test_block_monotone	The length and the length per emitted pulse pair both rise with the block size and fall with the span, to zero at 250 km. MidpointBlock.test_block_reach is the same pair through q.Swap.	✅ pass
test_epsilon_price	A weaker secrecy parameter buys a longer key.	✅ pass
test_length_units	The length is whole bits, floored rather than rounded so no uncertified bit is claimed, and zero on a block too short.	✅ pass
test_rate_ceiling	CROSS-ENGINE. The finite length per code bit, less its vacuum term, rises toward mdi_rate over the signal-setting gain without exceeding it, at exponent -0.5001 over four decades from 1e16.	✅ pass