Constant COINS_DEFAULT_LIMIT 

pub const COINS_DEFAULT_LIMIT: u32 = COINS_BY_PARENT_DEFAULT_LIMIT; // 100u32

The page size control.wallet.coins uses when the caller names none (dig-node#381).

Pinned TO its sibling rather than restated. Both reads page the same WalletCoinRecord over the same transport frame, so the derivation that fixes one fixes the other, and a second literal here would be a second thing to forget when the frame limit moves.