Feature: add revert reason to receipt

src/confirm.rs

@@ -86,6 +86,7 @@ async fn send_transaction_with_confirmation_<T: Transport>(
         .transaction_receipt(hash)
         .await?
         .expect("receipt can't be null after wait for confirmations; qed");
+
     Ok(receipt)
 }
 
@@ -163,6 +164,7 @@ mod tests {
             logs_bloom: Default::default(),
             transaction_type: None,
             effective_gas_price: Default::default(),
+            revert_reason: None,
         };
 
         let poll_interval = Duration::from_secs(0);

src/error.rs

@@ -47,13 +47,17 @@ pub enum Error {
     /// web3 internal error
     #[display(fmt = "Internal Web3 error")]
     Internal,
+    /// Transaction reverted
+    #[display(fmt = "Transaction reverted: {}", _0)]
+    #[from(ignore)]
+    Revert(String),
 }
 
 impl std::error::Error for Error {
     fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
         use self::Error::*;
         match *self {
-            Unreachable | Decoder(_) | InvalidResponse(_) | Transport { .. } | Internal => None,
+            Unreachable | Decoder(_) | InvalidResponse(_) | Transport { .. } | Internal | Revert(_) => None,
             Rpc(ref e) => Some(e),
             Io(ref e) => Some(e),
             Recovery(ref e) => Some(e),
@@ -79,6 +83,7 @@ impl Clone for Error {
             Io(e) => Io(IoError::from(e.kind())),
             Recovery(e) => Recovery(e.clone()),
             Internal => Internal,
+            Revert(s) => Revert(s.clone()),
         }
     }
 }
@@ -94,6 +99,7 @@ impl PartialEq for Error {
             (Rpc(a), Rpc(b)) => a == b,
             (Io(a), Io(b)) => a.kind() == b.kind(),
             (Recovery(a), Recovery(b)) => a == b,
+            (Revert(a), Revert(b)) => a == b,
             _ => false,
         }
     }

src/types/transaction.rs

@@ -108,6 +108,16 @@ pub struct Receipt {
     /// Effective gas price
     #[serde(rename = "effectiveGasPrice")]
     pub effective_gas_price: Option<U256>,
+    /// Transaction revert reason
+    #[serde(rename = "revertReason")]
+    pub revert_reason: Option<String>,
+}
+
+impl Receipt {
+    /// Checks transaction execution reverted
+    pub fn is_txn_reverted(&self) -> bool {
+        self.status == Some(0.into())
+    }
 }
 
 /// Raw bytes of a signed, but not yet sent transaction