From ff590ac70e7a858a64d7a4835a22f6d94b31b886 Mon Sep 17 00:00:00 2001
From: littleblack111 <littleblack11111@gmail.com>
Date: Mon, 20 Oct 2025 23:05:54 +0800
Subject: init

---
 src/blocks.rs | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 src/blocks.rs

(limited to 'src/blocks.rs')

diff --git a/src/blocks.rs b/src/blocks.rs
new file mode 100644
index 0000000..39abde2
--- /dev/null
+++ b/src/blocks.rs
@@ -0,0 +1,88 @@
+use std::{
+    hash::{DefaultHasher, Hash, Hasher},
+    ops::Deref,
+};
+
+use serde::{Deserialize, Serialize};
+
+use crate::{ZERO_PREFIX_AMOUNT, transaction::Transaction};
+
+#[derive(Deserialize, Serialize, Clone, Copy)]
+pub struct Block {
+    pub prev_hash: u64,
+    pub trans: Transaction,
+    pub pow: Option<u64>,
+}
+
+impl Block {
+    fn new(prev_hash: Option<u64>, trans: Transaction) -> Self {
+        Self {
+            prev_hash: prev_hash.unwrap_or(0), // special blocks
+            trans,
+            pow: None,
+        }
+    }
+
+    fn calc_pow(&self) -> u64 {
+        for i in 0.. {
+            // reset every loop
+            let mut hasher = DefaultHasher::new();
+            (&self.prev_hash, &self.trans, i).hash(&mut hasher);
+            let hashed = hasher.finish();
+            if hashed
+                .to_string()
+                .starts_with(
+                    &"0".repeat(ZERO_PREFIX_AMOUNT)
+                        .to_string(),
+                )
+            {
+                return hashed;
+            }
+        }
+        unreachable!()
+    }
+
+    pub fn calc_set_pow(&mut self) {
+        self.pow = Some(self.calc_pow());
+    }
+}
+
+impl Hash for Block {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.prev_hash
+            .hash(state);
+        self.trans
+            .hash(state);
+        if self
+            .pow
+            .is_none()
+        {
+            Self::calc_pow(self).hash(state);
+        } else {
+            self.pow
+                .hash(state);
+        }
+    }
+}
+
+#[derive(Default, Deserialize, Serialize, Clone)]
+pub struct BlockChain {
+    blocks: Vec<Block>,
+}
+
+impl BlockChain {
+    pub fn new(blocks: Vec<Block>) -> Self {
+        Self {
+            blocks,
+        }
+    }
+
+    pub fn store(&mut self, block: Block) {}
+}
+
+impl Deref for BlockChain {
+    type Target = Vec<Block>;
+    fn deref(&self) -> &Self::Target {
+        &self.blocks
+    }
+}
-- 
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