parser: fixed hanging + global: snapshot

crates/brk_parser/src/block_state.rs

@@ -0,0 +1,25 @@
+use bitcoin::{Block, consensus::Decodable, io::Cursor};
+
+use crate::{XORBytes, XORIndex};
+
+pub enum BlockState {
+    Raw(Vec<u8>),
+    Decoded(Block),
+}
+
+impl BlockState {
+    pub fn decode(&mut self, xor_i: &mut XORIndex, xor_bytes: &XORBytes) {
+        let bytes = match self {
+            BlockState::Raw(bytes) => bytes,
+            _ => unreachable!(),
+        };
+
+        xor_i.bytes(bytes.as_mut_slice(), xor_bytes);
+
+        let mut cursor = Cursor::new(bytes);
+
+        let block = Block::consensus_decode(&mut cursor).unwrap();
+
+        *self = BlockState::Decoded(block);
+    }
+}