feat: repair KREAd contract on zoe upgrade

golang/cosmos/app/app.go

@@ -936,6 +936,8 @@ func unreleasedUpgradeHandler(app *GaiaApp, targetUpgrade string) func(sdk.Conte
 			CoreProposalSteps = []vm.CoreProposalStep{
 				// Upgrade Zoe + ZCF
 				vm.CoreProposalStepForModules("@agoric/builders/scripts/vats/replace-zoe.js"),
+				// Revive KREAd characters
+				vm.CoreProposalStepForModules("@agoric/builders/scripts/vats/revive-kread.js"),
 
 				// upgrade the provisioning vat
 				vm.CoreProposalStepForModules("@agoric/builders/scripts/vats/replace-provisioning.js"),

packages/builders/scripts/vats/revive-kread.js

@@ -0,0 +1,13 @@
+import { makeHelpers } from '@agoric/deploy-script-support';
+
+/** @type {import('@agoric/deploy-script-support/src/externalTypes.js').CoreEvalBuilder} */
+export const defaultProposalBuilder = async () =>
+  harden({
+    sourceSpec: '@agoric/vats/src/proposals/kread-proposal.js',
+    getManifestCall: ['getManifestForKread'],
+  });
+
+export default async (homeP, endowments) => {
+  const { writeCoreProposal } = await makeHelpers(homeP, endowments);
+  await writeCoreProposal('revive-kread', defaultProposalBuilder);
+};

packages/vats/src/proposals/kread-proposal.js

@@ -0,0 +1,24 @@
+import { E } from '@endo/far';
+
+/**
+ * @param {BootstrapPowers & {
+ *   consume: { kreadKit: any };
+ * }} powers
+ */
+export const repairKread = async ({ consume: { kreadKit: kreadKitP } }) => {
+  console.log('repairSubscribers');
+
+  const kreadKit = await kreadKitP;
+  const creatorFacet = kreadKit.creatorFacet;
+  console.log(`KREAd creatorFacet`, creatorFacet);
+  await E(creatorFacet).reviveMarketExitSubscribers();
+  console.log('KREAd subscribers were revived!');
+};
+
+export const getManifestForKread = _powers => ({
+  manifest: {
+    [repairKread.name]: {
+      consume: { kreadKit: true },
+    },
+  },
+});