feat: add onAbort interface

contracts/Revert.sol

@@ -29,10 +29,38 @@ struct RevertContext {
     bytes revertMessage;
 }
 
+/// @notice Struct containing abort context passed to onAbort.
+/// @param sender Address of account that initiated smart contract call.
+/// bytes is used as the crosschain transaction can be initiated from a non-EVM chain.
+/// @param asset Address of asset. On a connected chain, it contains the fungible
+/// token address or is empty if it's a gas token. On ZetaChain, it contains the
+/// address of the ZRC20.
+/// @param amount Amount specified with the transaction.
+/// @param outgoing Flag to indicate if the crosschain transaction was outgoing: from ZetaChain to connected chain.
+/// if false, the transaction was incoming: from connected chain to ZetaChain.
+/// @param chainID Chain ID of the connected chain.
+/// @param revertMessage Arbitrary data specified in the revert options
+struct AbortContext {
+    bytes sender;
+    address asset;
+    uint256 amount;
+    bool outgoing;
+    uint256 chainID;
+    bytes revertMessage;
+}
+
 /// @title Revertable
 /// @notice Interface for contracts that support revertable calls.
 interface Revertable {
     /// @notice Called when a revertable call is made.
     /// @param revertContext Revert context to pass to onRevert.
     function onRevert(RevertContext calldata revertContext) external;
 }
+
+/// @title Abortable
+/// @notice Interface for contracts that support abortable calls.
+interface Abortable {
+    /// @notice Called when a revertable call is aborted.
+    /// @param abortContext Abort context to pass to onAbort.
+    function onAbort(AbortContext calldata abortContext) external;
+}