Fix parsing of multisig errors

This is broken in Anchor, but we can do it by hand then ...

cli/src/error.rs

@@ -264,21 +264,78 @@ impl AsPrettyError for ClientError {
  }
 }
 
+/// Parse an error code back to a multisig error.
+///
+/// We need to write this manually, because `multisig::Error::from`
+/// unfortunately doesn’t convert back from error codes, it appears
+/// to be broken. See also <https://github.com/ChorusOne/solido/issues/177>.
+pub fn multisig_error_from_u32(error_code: u32) -> Option<multisig::ErrorCode> {
+ use multisig::ErrorCode;
+
+ let all_errors = [
+ ErrorCode::InvalidOwner,
+ ErrorCode::NotEnoughSigners,
+ ErrorCode::TransactionAlreadySigned,
+ ErrorCode::Overflow,
+ ErrorCode::UnableToDelete,
+ ErrorCode::AlreadyExecuted,
+ ErrorCode::InvalidThreshold,
+ ];
+
+ // The purpose of the match statement below is to trigger a compile error if
+ // the `ErrorCode` enum changes in a future version of the multisig program.
+ // If you ended up here to fix that, please also add the new variant to the
+ // list above!
+ match all_errors[0] {
+ ErrorCode::InvalidOwner => { /* See comment above! */ }
+ ErrorCode::NotEnoughSigners => { /* See comment above! */ }
+ ErrorCode::TransactionAlreadySigned => { /* See comment above! */ }
+ ErrorCode::Overflow => { /* See comment above! */ }
+ ErrorCode::UnableToDelete => { /* See comment above! */ }
+ ErrorCode::AlreadyExecuted => { /* See comment above! */ }
+ ErrorCode::InvalidThreshold => { /* See comment above! */ }
+ }
+
+ for &error in &all_errors {
+ match ProgramError::from(error) {
+ ProgramError::Custom(x) if x == error_code => return Some(error),
+ _ => continue,
+ }
+ }
+
+ None
+}
+
+#[cfg(test)]
+mod test {
+ use crate::error::multisig_error_from_u32;
+
+ #[test]
+ fn test_multisig_error_from_u32() {
+ // We use `assert!matches!` because `ErrorCode` does not implement `Eq`.
+ assert!(matches!(
+ multisig_error_from_u32(0x65),
+ Some(multisig::ErrorCode::NotEnoughSigners),
+ ));
+ assert!(matches!(multisig_error_from_u32(u32::MAX), None));
+ }
+}
+
 pub fn print_pretty_error_code(error_code: u32) {
  print_key("Error code interpretations:");
  println!("\n");
  match LidoError::from_u32(error_code) {
  Some(err) => println!(" Solido error {} is {:?}", error_code, err),
  None => println!(" Error {} is not a known Solido error.", error_code),
  }
- match multisig::Error::from(ProgramError::Custom(error_code)) {
- // Anchor calls it an "ErrorCode", but it's really an enum
- // with user-defined errors (as opposed to the Solana ProgramError).
- multisig::Error::ErrorCode(custom_error) => {
- println!(" Multisig error {} is {:?}", error_code, custom_error);
- println!(" {}", custom_error);
+ match multisig_error_from_u32(error_code) {
+ Some(multisig_error) => {
+  println!(
+  " Multisig error {} is {:?}: {}",
+ error_code, multisig_error, multisig_error
+ );
  }
- _ => {
+ None => {
  println!(" Error {} is not a known Multisig error.", error_code);
  }
  }

tests/test_multisig.py

@@ -201,11 +201,7 @@
  )
 except subprocess.CalledProcessError as err:
  assert err.returncode != 0
- # assert 'Not enough owners signed this transaction' in err.stderr
- # TODO(#177) Previously the error included a human-readable message, why does it
- # only include the error code now? Something to do with different Anchor
- # versions?
- assert 'custom program error: 0x65' in err.stdout
+ assert 'Not enough owners signed this transaction' in err.stdout
  new_info = solana_program_show(program_id)
  assert new_info == upload_info, 'Program should not have changed.'
  print('> Execution failed as expected.')
@@ -286,11 +282,7 @@
  )
 except subprocess.CalledProcessError as err:
  assert err.returncode != 0
- # assert 'The given transaction has already been executed.' in err.stderr
- # TODO(#177) Previously the error included a human-readable message, why does it
- # only include the error code now? Something to do with different Anchor
- # versions?
- assert 'custom program error: 0x69' in err.stdout
+ assert 'The given transaction has already been executed.' in err.stdout
  new_info = solana_program_show(program_id)
  assert new_info == upgrade_info, 'Program should not have changed.'
  print('> Execution failed as expected.')
@@ -455,11 +447,7 @@
  )
 except subprocess.CalledProcessError as err:
  assert err.returncode != 0
- # assert 'The given owner is not part of this multisig.' in err.stderr
- # TODO(#177) Previously the error included a human-readable message, why does it
- # only include the error code now? Something to do with different Anchor
- # versions?
- assert 'custom program error: 0x64' in err.stdout
+ assert 'The given owner is not part of this multisig.' in err.stdout
  result = multisig(
  'show-transaction',
  '--multisig-program-id',