Move errors to their own file.

Change-Id: If76fc6096f2788e13dad15ea088202159793fb0b

solana/bridge/program/src/api/governance.rs

@@ -16,6 +16,12 @@ use crate::{
         GuardianSet,
         GuardianSetDerivationData,
     },
+    error::Error::{
+        InvalidFeeRecipient,
+        InvalidGovernanceKey,
+        InvalidGovernanceWithdrawal,
+        InvalidGuardianSetUpgrade,
+    },
     types::{
         GovernancePayloadGuardianSetChange,
         GovernancePayloadSetMessageFee,
@@ -26,12 +32,6 @@ use crate::{
         ClaimableVAA,
         DeserializePayload,
     },
-    Error::{
-        InvalidFeeRecipient,
-        InvalidGovernanceKey,
-        InvalidGovernanceWithdrawal,
-        InvalidGuardianSetUpgrade,
-    },
     CHAIN_ID_SOLANA,
 };
 

solana/bridge/program/src/api/initialize.rs

@@ -5,8 +5,8 @@ use crate::{
         GuardianSet,
         GuardianSetDerivationData,
     },
+    error::Error::TooManyGuardians,
     types::*,
-    Error::TooManyGuardians,
     MAX_LEN_GUARDIAN_KEYS,
 };
 use solana_program::sysvar::clock::Clock;

solana/bridge/program/src/api/post_message.rs

@@ -7,14 +7,13 @@ use crate::{
         Sequence,
         SequenceDerivationData,
     },
-    Error::{
+    error::Error::{
         InsufficientFees,
         MathOverflow,
     },
     CHAIN_ID_SOLANA,
 };
 use solana_program::{
-    msg,
     pubkey::Pubkey,
     sysvar::clock::Clock,
 };

solana/bridge/program/src/api/post_vaa.rs

@@ -19,8 +19,11 @@ use crate::{
         SignatureSet,
         SignatureSetDerivationData,
     },
-    Error,
-    Error::GuardianSetMismatch,
+    error::Error::{
+        GuardianSetMismatch,
+        PostVAAConsensusFailed,
+        PostVAAGuardianSetExpired,
+    },
     CHAIN_ID_SOLANA,
 };
 use byteorder::{
@@ -29,7 +32,6 @@ use byteorder::{
 };
 use sha3::Digest;
 use solana_program::{
-    msg,
     program_error::ProgramError,
     pubkey::Pubkey,
 };
@@ -155,7 +157,7 @@ pub fn post_vaa(ctx: &ExecutionContext, accs: &mut PostVAA, vaa: PostVAAData) ->
     };
 
     if signature_count < required_consensus_count {
-        return Err(Error::PostVAAConsensusFailed.into());
+        return Err(PostVAAConsensusFailed.into());
     }
 
     // If the VAA originates from another chain we need to create the account and populate all fields
@@ -186,7 +188,7 @@ fn check_active<'r>(
     if guardian_set.expiration_time != 0
         && (guardian_set.expiration_time as i64) < clock.unix_timestamp
     {
-        return Err(Error::PostVAAGuardianSetExpired.into());
+        return Err(PostVAAGuardianSetExpired.into());
     }
     Ok(())
 }

solana/bridge/program/src/api/verify_signature.rs

@@ -7,7 +7,7 @@ use crate::{
         SignatureSet,
         SignatureSetDerivationData,
     },
-    Error::{
+    error::Error::{
         GuardianSetMismatch,
         InstructionAtWrongIndex,
         InvalidHash,

solana/bridge/program/src/error.rs

@@ -0,0 +1,35 @@
+//! Define application level errors that can be returned by the various instruction handlers that
+//! make up the wormhole bridge.
+
+use crate::trace;
+use solitaire::SolitaireError;
+
+#[derive(Debug)]
+pub enum Error {
+    GuardianSetMismatch,
+    InstructionAtWrongIndex,
+    InsufficientFees,
+    InvalidFeeRecipient,
+    InvalidGovernanceAction,
+    InvalidGovernanceChain,
+    InvalidGovernanceKey,
+    InvalidGovernanceModule,
+    InvalidGovernanceWithdrawal,
+    InvalidGuardianSetUpgrade,
+    InvalidHash,
+    InvalidSecpInstruction,
+    MathOverflow,
+    PostVAAConsensusFailed,
+    PostVAAGuardianSetExpired,
+    TooManyGuardians,
+    VAAAlreadyExecuted,
+}
+
+/// Errors thrown by the program will bubble up to the solitaire wrapper, which needs a way to
+/// translate these errors into something Solitaire can log and handle.
+impl From<Error> for SolitaireError {
+    fn from(e: Error) -> SolitaireError {
+        trace!("ProgramError: {:?}", e);
+        SolitaireError::Custom(e as u64)
+    }
+}

solana/bridge/program/src/lib.rs

@@ -2,10 +2,9 @@
 #![allow(non_upper_case_globals)]
 #![allow(incomplete_features)]
 
-use solana_program::msg;
-
 pub mod accounts;
 pub mod api;
+pub mod error;
 pub mod types;
 pub mod vaa;
 
@@ -50,39 +49,8 @@ pub use vaa::{
 };
 
 const MAX_LEN_GUARDIAN_KEYS: usize = 19;
-
 const CHAIN_ID_SOLANA: u16 = 1;
 
-#[derive(Debug)]
-enum Error {
-    GuardianSetMismatch,
-    InstructionAtWrongIndex,
-    InsufficientFees,
-    InvalidFeeRecipient,
-    InvalidGovernanceAction,
-    InvalidGovernanceChain,
-    InvalidGovernanceKey,
-    InvalidGovernanceModule,
-    InvalidGovernanceWithdrawal,
-    InvalidGuardianSetUpgrade,
-    InvalidHash,
-    InvalidSecpInstruction,
-    MathOverflow,
-    PostVAAConsensusFailed,
-    PostVAAGuardianSetExpired,
-    TooManyGuardians,
-    VAAAlreadyExecuted,
-}
-
-/// Translate from program specific errors to Solitaire framework errors. Log the error on the way
-/// out of the program for debugging.
-impl From<Error> for SolitaireError {
-    fn from(e: Error) -> SolitaireError {
-        msg!("ProgramError: {:?}", e);
-        SolitaireError::Custom(e as u64)
-    }
-}
-
 solitaire! {
     Initialize(InitializeData)                  => initialize,
     PostMessage(PostMessageData)                => post_message,

solana/bridge/program/src/types.rs

@@ -21,7 +21,6 @@ use solitaire::{
         AccountOwner,
         Owned,
     },
-    trace,
     SolitaireError,
 };
 use std::{
@@ -309,7 +308,6 @@ pub struct GovernancePayloadSetMessageFee {
 
 impl SerializePayload for GovernancePayloadSetMessageFee {
     fn serialize<W: Write>(&self, v: &mut W) -> std::result::Result<(), SolitaireError> {
-        use byteorder::WriteBytesExt;
         let mut fee_data = [0u8; 32];
         self.fee.to_big_endian(&mut fee_data);
         v.write(&fee_data[..])?;
@@ -359,11 +357,10 @@ pub struct GovernancePayloadTransferFees {
 
 impl SerializePayload for GovernancePayloadTransferFees {
     fn serialize<W: Write>(&self, v: &mut W) -> std::result::Result<(), SolitaireError> {
-        use byteorder::WriteBytesExt;
         let mut amount_data = [0u8; 32];
         self.amount.to_big_endian(&mut amount_data);
         v.write(&amount_data)?;
-        v.write(&self.to);
+        v.write(&self.to)?;
         Ok(())
     }
 }

solana/bridge/program/src/vaa.rs

@@ -3,13 +3,13 @@ use crate::{
         Claim,
         ClaimDerivationData,
     },
-    types::PostedMessage,
-    Error::{
+    error::Error::{
         InvalidGovernanceAction,
         InvalidGovernanceChain,
         InvalidGovernanceModule,
         VAAAlreadyExecuted,
     },
+    types::PostedMessage,
     Result,
     CHAIN_ID_SOLANA,
 };