Merge pull request #29 from rustaceanrob/8-12-kernel-hints

Initial program for building a hintfile with `bitcoinkernel`

Author: rustaceanrob

.gitignore

@@ -2,3 +2,4 @@
 Cargo.lock
 !justfile
 *.db
+*.hints

Cargo.toml

@@ -1,7 +1,7 @@
 [workspace]
 members = ["accumulator", "hintfile", "network"]
 default-members = ["accumulator", "hintfile", "network"]
-resolver = "3"
+resolver = "2"
 
 [workspace.dependencies]
 bitcoin = { git = "https://github.com/rust-bitcoin/rust-bitcoin", default-features = false, rev = "16cc257c3695dea0e7301a5fa9cab44b8ed60598" }

accumulator/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "accumulator"
 version = "0.1.0"
-edition = "2024"
+edition = "2021"
 
 [dependencies]
 bitcoin = { workspace = true } 

flake.lock

@@ -1,6 +1,11 @@
 [package]
 name = "hintfile"
 version = "0.1.0"
-edition = "2024"
+edition = "2021"
 
 [dependencies]
+bitcoin = { workspace = true }
+kernel = { package = "bitcoinkernel", git = "https://github.com/alexanderwiederin/rust-bitcoinkernel.git" }
+
+[[bin]]
+name = "construct"

flake.nix

@@ -0,0 +1,40 @@
+use std::{fs::File, sync::Arc};
+
+use bitcoin::consensus;
+use kernel::{ChainType, ChainstateManager, ChainstateManagerOptions, ContextBuilder, KernelError};
+
+fn main() {
+    let mut file = File::create("./signet.hints").unwrap();
+
+    let mut args = std::env::args();
+    let _ = args.next();
+    let data_dir = args.next().expect("Usage: <path_to_bitcoin_dir>");
+    let mut blocks_dir = data_dir.clone();
+    blocks_dir.push_str("/blocks");
+    println!("Initializing");
+    let ctx = ContextBuilder::new()
+        .chain_type(ChainType::SIGNET)
+        .build()
+        .unwrap();
+    let options = ChainstateManagerOptions::new(&ctx, &data_dir, &blocks_dir).unwrap();
+    let context = Arc::new(ctx);
+    let chainman = ChainstateManager::new(options, context).unwrap();
+    println!("Chain state initialized");
+    let genesis = chainman.get_block_index_genesis();
+    let mut current = chainman.get_next_block_index(genesis).unwrap();
+    loop {
+        let block = chainman.read_block_data(&current).unwrap();
+        let bytes: Vec<u8> = block.into();
+        let block = consensus::deserialize::<bitcoin::Block>(&bytes).unwrap();
+        let (_, transactions) = block.into_parts();
+        println!("On block {}", current.height());
+        let mut delta: u64 = 0;
+        let mut block_offsets: Vec<u64> = Vec::new();
+        for tx in transactions {}
+        match chainman.get_next_block_index(current) {
+            Ok(next) => current = next,
+            Err(KernelError::OutOfBounds) => break,
+            Err(e) => panic!("{e}"),
+        }
+    }
+}

hintfile/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "peers"
 version = "0.1.0"
-edition = "2024"
+edition = "2021"
 
 [dependencies]
 tokio = { version = "1", default-features = false, optional = true, features = [