removed unused error types

src/error.rs

@@ -9,15 +9,6 @@ pub type Result<T> = std::result::Result<T, Error>;
 #[derive(Debug, Clone)]
 
 pub enum Error {
-    Foo,
-    CommitsDontAdd,
-    InvalidCredential,
-    TransactionPedersenCheckFailed,
-    TokenAlreadySpent,
-    InputTokenVerifyFailed,
-    RangeproofPedersenMatchFailed,
-    ProofsFailed,
-    MissingProofs,
     Io(std::io::ErrorKind),
     /// VarInt was encoded in a non-minimal way
     NonMinimalVarInt,
@@ -54,19 +45,6 @@ impl std::error::Error for Error {}
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> std::fmt::Result {
         match *self {
-            Error::Foo => f.write_str("foo"),
-            Error::CommitsDontAdd => f.write_str("Commits don't add up properly"),
-            Error::InvalidCredential => f.write_str("Credential is invalid"),
-            Error::TransactionPedersenCheckFailed => {
-                f.write_str("Transaction pedersens for input and output don't sum up")
-            }
-            Error::TokenAlreadySpent => f.write_str("This input token is already spent"),
-            Error::InputTokenVerifyFailed => f.write_str("Input token verify of credential failed"),
-            Error::RangeproofPedersenMatchFailed => {
-                f.write_str("Rangeproof pedersen check for match failed")
-            }
-            Error::ProofsFailed => f.write_str("Proof validation failed"),
-            Error::MissingProofs => f.write_str("Missing proofs"),
             Error::Io(ref err) => write!(f, "io error:{:?}", err),
             Error::NonMinimalVarInt => f.write_str("non-minimal varint"),
             Error::ParseFailed(ref err) => write!(f, "parse failed: {}", err),
@@ -164,4 +142,3 @@ impl From<state::VerifyFailed> for Error {
         Error::VerifyFailed
     }
 }
-