pub fn chain_step_block_kernel(
salted_nonce: [b8; 16],
secret: [b8; 18],
) -> [b8; 64]Expand description
Builds the zero-tailed DSig chain block from its two live fields.
Inputs: the 16-byte salted nonce and the 18-byte node. Output: the
64-byte block of dsig_chain_block.
Pure wiring: no gates. The other chain hashes in crate::chain_lane
reuse it.