feat(core): Add `as_*_mut` methods on `TypedTransaction` (#1310)

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 ### Unreleased
 
+- Add `as_*_mut` methods on `TypedTransaction`
+  [#1310](https://github.com/gakonst/ethers-rs/pull/1310)
 - AWS EIP712 data signing no longer signs with EIP155
 - Added Cronos testnet to etherscan options [1276](https://github.com/gakonst/ethers-rs/pull/1276)
 - Fix parsing of a pending block

ethers-core/src/types/transaction/eip2718.rs

@@ -417,6 +417,25 @@ impl TypedTransaction {
             _ => None,
         }
     }
+
+    pub fn as_legacy_mut(&mut self) -> Option<&mut TransactionRequest> {
+        match self {
+            Legacy(tx) => Some(tx),
+            _ => None,
+        }
+    }
+    pub fn as_eip2930_mut(&mut self) -> Option<&mut Eip2930TransactionRequest> {
+        match self {
+            Eip2930(tx) => Some(tx),
+            _ => None,
+        }
+    }
+    pub fn as_eip1559_mut(&mut self) -> Option<&mut Eip1559TransactionRequest> {
+        match self {
+            Eip1559(tx) => Some(tx),
+            _ => None,
+        }
+    }
 }
 
 impl TypedTransaction {