48 lines
1.6 KiB
Rust
48 lines
1.6 KiB
Rust
use std::sync::Arc;
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use std::path::PathBuf;
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use std::fs::create_dir_all;
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use app_dirs::{app_dir, AppDataType};
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use {storage, APP_INFO};
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use db;
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use config::Config;
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use chain::IndexedBlock;
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pub fn open_db(data_dir: &Option<String>, db_cache: usize) -> storage::SharedStore {
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let db_path = match *data_dir {
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Some(ref data_dir) => custom_path(&data_dir, "db"),
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None => app_dir(AppDataType::UserData, &APP_INFO, "db").expect("Failed to get app dir"),
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};
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Arc::new(db::BlockChainDatabase::open_at_path(db_path, db_cache).expect("Failed to open database"))
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}
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pub fn node_table_path(cfg: &Config) -> PathBuf {
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let mut node_table = match cfg.data_dir {
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Some(ref data_dir) => custom_path(&data_dir, "p2p"),
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None => app_dir(AppDataType::UserData, &APP_INFO, "p2p").expect("Failed to get app dir"),
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};
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node_table.push("nodes.csv");
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node_table
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}
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pub fn init_db(cfg: &Config) -> Result<(), String> {
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// insert genesis block if db is empty
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let genesis_block: IndexedBlock = cfg.network.genesis_block().into();
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match cfg.db.block_hash(0) {
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Some(ref db_genesis_block_hash) if db_genesis_block_hash != genesis_block.hash() => Err("Trying to open database with incompatible genesis block".into()),
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Some(_) => Ok(()),
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None => {
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let hash = genesis_block.hash().clone();
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cfg.db.insert(genesis_block).expect("Failed to insert genesis block to the database");
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cfg.db.canonize(&hash).expect("Failed to canonize genesis block");
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Ok(())
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}
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}
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}
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fn custom_path(data_dir: &str, sub_dir: &str) -> PathBuf {
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let mut path = PathBuf::from(data_dir);
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path.push(sub_dir);
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create_dir_all(&path).expect("Failed to get app dir");
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path
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}
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