Merge pull request #75 from 0xripleys/0xripleys_add_new_fn

Add 'new_from_bytes' function and update dependencies

rust/switchboard-v2/Cargo.toml

@@ -22,10 +22,10 @@ cpi = ["no-entrypoint"]
 devnet = []
 
 [dependencies]
-anchor-lang = "0.25.0"
-anchor-spl = "0.25.0"
-rust_decimal = { version = "1.18.0" }
-solana-program = "~1.10.29"
+anchor-lang = { git = "https://github.com/coral-xyz/anchor.git" }
+anchor-spl = { git = "https://github.com/coral-xyz/anchor.git" }
+rust_decimal = "1.26.0"
+solana-program = "1.10"
 bytemuck = "1.7.2"
 superslice = "1"
-spl-token = "3.3.1"
+spl-token = "3.3"

rust/switchboard-v2/src/aggregator.rs

@@ -175,6 +175,34 @@ impl AggregatorAccountData {
             bytemuck::from_bytes(&data[8..std::mem::size_of::<AggregatorAccountData>() + 8])
         }))
     }
+
+    /// Returns the deserialized Switchboard Aggregator account
+    ///
+    /// # Arguments
+    ///
+    /// * `data` - A Solana AccountInfo's data buffer
+    ///
+    /// # Examples
+    ///
+    /// ```ignore
+    /// use switchboard_v2::AggregatorAccountData;
+    ///
+    /// let data_feed = AggregatorAccountData::new(feed_account_info.try_borrow_data()?)?;
+    /// ```
+    pub fn new_from_bytes(data: &[u8]) -> anchor_lang::Result<&AggregatorAccountData> {
+        if data.len() < AggregatorAccountData::discriminator().len() {
+            return Err(ErrorCode::AccountDiscriminatorNotFound.into());
+        }
+
+        let mut disc_bytes = [0u8; 8];
+        disc_bytes.copy_from_slice(&data[..8]);
+        if disc_bytes != AggregatorAccountData::discriminator() {
+            return Err(ErrorCode::AccountDiscriminatorMismatch.into());
+        }
+
+        Ok(bytemuck::from_bytes(&data[8..std::mem::size_of::<AggregatorAccountData>() + 8]))
+    }
+
     /// If sufficient oracle responses, returns the latest on-chain result in SwitchboardDecimal format
     ///
     /// # Examples

rust/switchboard-v2/src/buffer_relayer.rs

@@ -101,9 +101,7 @@ impl BufferRelayerAccountData {
     }
 }
 impl Discriminator for BufferRelayerAccountData {
-    fn discriminator() -> [u8; 8] {
-        [50, 35, 51, 115, 169, 219, 158, 52]
-    }
+    const DISCRIMINATOR: [u8; 8] = [50, 35, 51, 115, 169, 219, 158, 52];
 }
 impl Owner for BufferRelayerAccountData {
     fn owner() -> solana_program::pubkey::Pubkey {