Method is_valid_index

src/wallet.rs:397–404

(&self, index: u32)

    }

    pub fn is_valid_index(&self, index: u32) -> bool {
        if self.is_wildcard {
            // non-hardended derivation only
            index & (1 << 31) == 0
        } else {
            index == 0
        }
    }

    pub fn find_gap(&self, store: &MemoryStore) -> Option<usize> {
        // return None if this wallet has no history at all