Add get_transaction_receipt method to Chain API

Author: Bhargavasomu

eth/chains/base.py

@@ -272,6 +272,10 @@ def create_unsigned_transaction(cls,
     def get_canonical_transaction(self, transaction_hash: Hash32) -> BaseTransaction:
         raise NotImplementedError("Chain classes must implement this method")
 
+    @abstractmethod
+    def get_transaction_receipt(self, transaction_hash: Hash32) -> Receipt:
+        raise NotImplementedError("Chain classes must implement this method")
+
     #
     # Execution API
     #
@@ -653,6 +657,17 @@ def create_unsigned_transaction(self,
             data=data,
         )
 
+    def get_transaction_receipt(self, transaction_hash: Hash32) -> Receipt:
+        transaction_block_number, transaction_index = self.chaindb.get_transaction_index(
+            transaction_hash,
+        )
+        receipt = self.chaindb.get_receipt_by_index(
+            block_number=transaction_block_number,
+            receipt_index=transaction_index,
+        )
+
+        return receipt
+
     #
     # Execution API
     #

eth/db/chain.py

@@ -125,6 +125,12 @@ def get_block_transactions(
     def get_block_transaction_hashes(self, block_header: BlockHeader) -> Iterable[Hash32]:
         raise NotImplementedError("ChainDB classes must implement this method")
 
+    @abstractmethod
+    def get_receipt_by_index(self,
+                             block_number: BlockNumber,
+                             receipt_index: int) -> Receipt:
+        raise NotImplementedError("ChainDB classes must implement this method")
+
     @abstractmethod
     def get_receipts(self,
                      header: BlockHeader,