test(fake-bridge): FakeTransferBridge implements IBC_METHOD

packages/vats/tools/fake-bridge.js

@@ -120,6 +120,17 @@ export const makeFakeBankBridge = (zone, opts = { balances: {} }) => {
   });
 };
 
+/** @param {any} obj */
+const toBridgeIbcMethod = obj => {
+  const { type, method, ...params } = obj;
+  assert.equal(type, 'IBC_METHOD');
+  if (method === 'sendPacket') {
+    const { packet } = params;
+    return harden({ ...packet, sequence: '39' });
+  }
+  return undefined;
+};
+
 /**
  * @param {import('@agoric/zone').Zone} zone
  * @param {(obj) => void} onToBridge
@@ -132,13 +143,7 @@ export const makeFakeIbcBridge = (zone, onToBridge) => {
     getBridgeId: () => 'dibc',
     toBridge: async obj => {
       onToBridge(obj);
-      const { method, type, ...params } = obj;
-      assert.equal(type, 'IBC_METHOD');
-      if (method === 'sendPacket') {
-        const { packet } = params;
-        return { ...packet, sequence: '39' };
-      }
-      return undefined;
+      return toBridgeIbcMethod(obj);
     },
     fromBridge: async obj => {
       if (!hndlr) throw Error('no handler!');
@@ -260,6 +265,9 @@ export const makeFakeTransferBridge = (zone, onToBridge = () => {}) => {
           registered.delete(params.target);
           return undefined;
         }
+        case 'IBC_METHOD': {
+          return toBridgeIbcMethod(obj);
+        }
         default:
           Fail`unknown type ${type}`;
       }