refactor: refactor smartWallet to use watchedPromises

pulled offers.js and payments.js into smartWallet.js as they shared
plenty of state that needs to be durable in order to be callable from
the watchedPromise.

build an upgrade proposal; tested in
Agoric/agoric-3-proposals#34

packages/boot/test/bootstrapTests/test-vaults-integration.ts

@@ -13,6 +13,7 @@ import {
 } from '@agoric/vats/tools/board-utils.js';
 import type { TestFn } from 'ava';
 import { ParamChangesOfferArgs } from '@agoric/inter-protocol/src/econCommitteeCharter.js';
+
 import { makeSwingsetTestKit } from '../../tools/supports.ts';
 import { makeWalletFactoryDriver } from '../../tools/drivers.ts';
 
@@ -136,6 +137,8 @@ test('adjust balances', async t => {
   });
 });
 
+// This test isn't marked .serial, but it depends on previous tests.
+
 test('close vault', async t => {
   const { walletFactoryDriver } = t.context;
 
@@ -151,7 +154,8 @@ test('close vault', async t => {
   });
   t.like(wd.getLatestUpdateRecord(), {
     updated: 'offerStatus',
-    status: { id: 'open-vault', numWantsSatisfied: 1 },
+    status: { id: 'open-vault', result: 'UNPUBLISHED', numWantsSatisfied: 1 },
+    error: undefined,
   });
   t.log('try giving more than is available in the purse/vbank');
   await t.throwsAsync(
@@ -171,6 +175,7 @@ test('close vault', async t => {
 
   const message =
     'Offer {"brand":"[Alleged: IST brand]","value":"[1n]"} is not sufficient to pay off debt {"brand":"[Alleged: IST brand]","value":"[5025000n]"}';
+
   await t.throwsAsync(
     wd.executeOfferMaker(
       Offers.vaults.CloseVault,
@@ -181,10 +186,9 @@ test('close vault', async t => {
       },
       'open-vault',
     ),
-    {
-      message,
-    },
+    { message },
   );
+
   t.like(wd.getLatestUpdateRecord(), {
     updated: 'offerStatus',
     status: {
@@ -204,10 +208,13 @@ test('close vault', async t => {
     },
     'open-vault',
   );
+
   t.like(wd.getLatestUpdateRecord(), {
     updated: 'offerStatus',
     status: {
       id: 'close-well',
+      error: undefined,
+      numWantsSatisfied: 1,
       result: 'your vault is closed, thank you for your business',
       // funds are returned
       payouts: likePayouts(giveCollateral, 0),
@@ -226,6 +233,7 @@ test('open vault with insufficient funds gives helpful error', async t => {
   const wantMinted = giveCollateral * 100;
   const message =
     'Proposed debt {"brand":"[Alleged: IST brand]","value":"[904500000n]"} exceeds max {"brand":"[Alleged: IST brand]","value":"[63462857n]"} for {"brand":"[Alleged: ATOM brand]","value":"[9000000n]"} collateral';
+
   await t.throwsAsync(
     wd.executeOfferMaker(Offers.vaults.OpenVault, {
       offerId: 'open-vault',