global: add mining related datasets

crates/brk_structs/src/structs/difficultyepoch.rs

@@ -10,6 +10,8 @@ use zerocopy_derive::{FromBytes, Immutable, IntoBytes, KnownLayout};
 
 use super::Height;
 
+pub const BLOCKS_PER_DIFF_EPOCHS: u32 = 2016;
+
 #[derive(
     Debug,
     Clone,
@@ -79,7 +81,7 @@ impl Div<usize> for DifficultyEpoch {
 
 impl From<Height> for DifficultyEpoch {
     fn from(value: Height) -> Self {
-        Self((u32::from(value) / 2016) as u16)
+        Self((u32::from(value) / BLOCKS_PER_DIFF_EPOCHS) as u16)
     }
 }
 

crates/brk_structs/src/structs/height.rs

@@ -12,7 +12,7 @@ use vecdb::{CheckedSub, Printable, Stamp, StoredCompressed};
 use zerocopy::{FromBytes, IntoBytes};
 use zerocopy_derive::{FromBytes, Immutable, IntoBytes, KnownLayout};
 
-use crate::copy_first_4bytes;
+use crate::{BLOCKS_PER_DIFF_EPOCHS, copy_first_4bytes};
 
 use super::StoredU64;
 
@@ -72,6 +72,10 @@ impl Height {
     pub fn is_not_zero(self) -> bool {
         self != Self::ZERO
     }
+
+    pub fn left_before_next_diff_adj(self) -> u32 {
+        BLOCKS_PER_DIFF_EPOCHS - (*self % 2016)
+    }
 }
 
 impl PartialEq<u64> for Height {