Constant CONFIRMATION_FINALITY_DELAY 

pub const CONFIRMATION_FINALITY_DELAY: u64 = 6; // 6u64

Re-exported for existing callers; the constants live in the common crate so that the client can render peg-in confirmation progress against them. Number of confirmations required for a transaction to be considered as final by the federation. The block that mines the transaction does not count towards the number of confirmations.