Add database initialization implementation.

zcash_client_backend/src/data_api/mod.rs

@@ -21,7 +21,7 @@ pub trait DBOps {
     //    type TxRef;   // Backend-specific transaction handle
     //    type NoteRef; // Backend-specific note identifier`
 
-    //    fn init_db() -> Result<(), Self::Error>;
+    fn init_db(&self) -> Result<(), Self::Error>;
     //
     //    fn init_accounts(extfvks: &[ExtendedFullViewingKey]) -> Result<(), Self::Error>;
     //
@@ -42,8 +42,6 @@ pub trait DBOps {
         block_height: BlockHeight,
     ) -> Result<(), Self::Error>;
     //
-    //    // fn get_target_and_anchor_heights() -> Result<(u32, u32), Self::Error>;
-    //
     //    fn get_address(account: Account) -> Result<String, Self::Error>;
     //
     //    fn get_balance(account: Account) -> Result<Amount, Self::Error>;
@@ -84,6 +82,8 @@ pub trait DBOps {
 pub trait CacheOps {
     type Error;
 
+    fn init_cache(&self) -> Result<(), Self::Error>;
+
     // Validate the cached chain by applying a function that checks pairwise constraints
     // (top_block :: &CompactBlock, next_block :: &CompactBlock) -> Result<(), Self::Error)
     // beginning with the current maximum height walking backward through the chain, terminating

zcash_client_sqlite/src/lib.rs

@@ -59,6 +59,10 @@ impl DataConnection {
 impl DBOps for DataConnection {
     type Error = Error<rusqlite::Error>;
 
+    fn init_db(&self) -> Result<(), Self::Error> {
+        init::init_data_database(self).map_err(Error::Database)
+    }
+
     fn block_height_extrema(&self) -> Result<Option<(BlockHeight, BlockHeight)>, Self::Error> {
         chain::block_height_extrema(self).map_err(Error::Database)
     }
@@ -87,6 +91,10 @@ impl CacheConnection {
 impl CacheOps for CacheConnection {
     type Error = Error<rusqlite::Error>;
 
+    fn init_cache(&self) -> Result<(), Self::Error> {
+        init::init_cache_database(self).map_err(Error::Database)
+    }
+
     fn validate_chain<F>(
         &self,
         from_height: BlockHeight,