feat(core): add separate withdrawals to implicit coin

Author: xdzurman

Diff for: packages/core/src/Cardano/util/computeImplicitCoin.ts

@@ -7,7 +7,11 @@ import { CertificateType, HydratedTxBody, Lovelace } from '../types';
  */
 export interface ImplicitCoin {
   /**
-   * Reward withdrawals + deposit reclaims
+   * Reward withdrawals
+   */
+  withdrawals?: Lovelace;
+  /**
+   * Reward withdrawals + deposit reclaims (total return)
    */
   input?: Lovelace;
   /**
@@ -44,6 +48,7 @@ export const computeImplicitCoin = (
   );
   return {
     deposit,
-    input: withdrawalsTotal + reclaimTotal
+    input: withdrawalsTotal + reclaimTotal,
+    withdrawals: withdrawalsTotal
   };
 };

Diff for: packages/core/test/Cardano/util/computeImplicitCoin.test.ts

@@ -24,5 +24,6 @@ describe('Cardano.util.computeImplicitCoin', () => {
     const coin = Cardano.util.computeImplicitCoin(protocolParameters, { certificates, withdrawals });
     expect(coin.deposit).toBe(2n + 2n);
     expect(coin.input).toBe(2n + 3n + 5n);
+    expect(coin.withdrawals).toBe(5n);
   });
 });